JP4882493B2 - Package - Google Patents

Description

  The present invention relates to an outer packaging box for a steam release packaging bag applied to an outer packaging of a steam release packaging bag in which cooked food such as retort food is hermetically sealed so that microwave heating is possible. Specifically, when the packaging bag is cooked and cooked with steam holes that are peeled and opened by internal pressure due to gas such as water vapor generated by heating the packaging bag with a microwave oven, the stored items are filled in the packaging bag. The present invention relates to an outer packaging box for a steam release packaging bag that does not scatter in a microwave oven.

  Conventionally, many foods and the like are packed in air-tight and liquid-tight packaging bags made of laminated films such as synthetic resins and are distributed as sealed packaged foods.

  Some of the sealed packaged foods are shipped after being cooked in a sealed package. In addition, in order to prevent spoilage, alteration, discoloration, taste change, etc. due to germs that may be mixed in the sealed packaged food until it is manufactured, stored, distributed, and eaten, The product may be shipped after being subjected to heat sterilization or heat / pressure sterilization in a state.

  As described above, the sealed packaged food is often heated before shipment. However, when a general consumer eats the packaged food, the sealed packaged food is often heated in a microwave oven or the like.

  The microwave oven vibrates water molecules contained in food by high-frequency (ultra-high frequency) irradiation, and heats the food with frictional heat generated by the vibration of the water molecules.

  Water vapor is generated along with the high-frequency heating by the microwave oven, and the normal sealed bag formed of the plastic film expands and bursts due to the water vapor.

  For this reason, in order to avoid the bursting of the sealed packaging food packaging bag due to an increase in the internal vapor pressure during heating, the packaging bag is opened and the contents are put in another container and heated in that container. There are things to do.

  Further, in a state of opening the packaging bag stored in the outer box, the food packaging body is heated with the opening opening facing upward so that the contents do not spill with the packaging box using the stored outer box. A microwave heating method (see, for example, Patent Document 1) is known.

  In this microwave heating method of a food packaging body, as shown in FIG. 13, a self-standing means 101 is provided from a component of the packaging box 100 in a packaging box 100 that houses a heat-resistant storage bag body 103. The self-supporting means 101 is separated from the packaging box, and the packaging box is attached to the self-supporting means 101. Then, the heat-resistant storage bag 103 is placed in a standing packaging box 100, and heated by being irradiated with microwaves.

  In addition, recently, due to the development of food processing technology and packaging technology and the spread of microwave ovens, etc., a packaging bag containing cooked foods that can be heated in a microwave oven that does not need to be opened unnecessarily when heating is proposed, It has been put into practical use.

  The cooked food-containing packaging bag capable of heating in the microwave oven is provided with a steam escape portion that opens when the internal vapor pressure rises above a predetermined pressure. And it can heat without opening.

  The cooked food-containing packaging bag capable of heating in the microwave oven is provided with a steam escape portion that opens when the internal vapor pressure rises above a predetermined pressure.

  For example, in order to discharge water vapor generated inside the bag by high-frequency heating of a microwave oven to the outside of the bag, a part of the pouch body is opened during heating, or an escape hole is provided in the pouch body.

  Also, make a water vapor adjustment hole and seal this water vapor adjustment hole with an adhesive seal, and peel off the seal before heating, or if the steam pressure in the pouch body increases by heating, the seal part will open easily Whether the valve is opened or not.

  On the other hand, the wrapping bag containing cooked food is made of paper for convenient storage, transportation, display, etc., and for displaying decoration, explanation of food, eating method, etc. at the distribution stage to consumers. It is often packed in a uniform packaging box.

  Many of the packaging boxes have flattened packaging bags containing cooked foods. In general, many flat rectangular parallelepiped shapes are observed.

  Furthermore, the microwave oven heating package which heats a microwave oven without taking out this packaging bag from the packaging box made from paper etc. in which the packaging bag containing the cooked food which can be heated with a microwave oven is accommodated (for example, refer patent document 2). ) And hermetically packaged food packaging boxes and hermetically packaged foods packaged in a packaging box (see, for example, Patent Document 3).

  As shown in FIG. 14, the microwave heating package is a microwave heating package 200 including an outer box 113 applied to the outer packaging of a packaging bag 112 in which cooked food is hermetically filled. And when it heats, the relief part for releasing the internal pressure of the packaging bag 112 is formed in the back sticking part.

  Further, when the microwave heating package 200 is heated, a cut-and-open portion 114 for exposing the back pasting portion from the exterior box 113 is formed. And when heating with a microwave oven, the separation opening part 114 is opened and the part for pressure relief is exposed.

  Further, a package box body of sealed packaged food and a package box body 300 of packaged packaged food packaged in a package box are packaged in such a manner that the food is sealed and packaged in a packaging bag 121 provided with a steam escape portion as shown in FIG. Housed in a box 122.

  And when heating with a microwave oven, in order to expose a vapor escape part, as shown in FIG. 16, the part from the front wall 116 of the top wall 115 is opened.

  It has been pointed out that heating the entire box in this way reduces the risk of burns when taken out from the microwave oven.

Prior art documents are shown below.
JP-A-4-214126 JP 2001-039476 A JP 2002-19776 A

  However, many of the packaging bags described above have a flat overall shape. For this reason, when it heats with the microwave oven hold | maintaining in the attitude | position which stood the packaging bag like patent document 1, in the microwave oven used in many households, the irradiation efficiency of the microwave to a packaging bag falls. And there exists a problem that heating takes time.

  Most of the boxes that can hold the packaging bag in a standing position are flat in transportation, storage, display, and the like. And the structure for deform | transforming so that a packaging bag may be hold | maintained to a standing posture becomes complicated, and there exists a problem that it takes an effort.

  Moreover, when opening a packaging bag, transferring to another container and heating with a microwave oven, preparation of a container etc. takes time and effort. And when taking out a container etc. from a microwave oven, there exists a possibility of burning a hand etc.

  Moreover, when the part which escapes the vapor | steam etc. by the internal pressure of a packaging bag like patent document 2 or 3 is exposed from an outer box and it heats with a microwave oven, the stored item in a packaging bag spouts from the part which escapes a vapor | steam etc. There is a case. And there is a problem that the inside of the microwave oven must be soiled and cleaned.

  The present invention has been made in order to solve the above-described problem, and a container such as a liquid substance, a solid substance, a solid-liquid mixture, or a viscous body is hermetically packaged, and the internal vapor pressure rises above a predetermined pressure. Heat-cooking is possible with a microwave oven or the like in a state in which the steam release package provided with steam holes opened by the steam pressure is stored in a flat posture. It is another object of the present invention to provide an outer packaging box for a steam release packaging bag that has no danger at the time of handling and that does not contaminate the inside of the microwave oven even if stored items are ejected during heating of the microwave oven or the like. To do.

In order to solve the above problems, the invention according to claim 1 of the present invention provides:
In a package composed of an outer box and a packaging bag stored in the outer box, the package that heats and cooks the contents of the packaging bag while storing the packaging bag in the outer box,
The packaging bag is flat, and the packaging bag is provided with vapor holes that are peeled open by an internal pressure of a gas such as water vapor generated by heating,
A part of the upper surface of the outer box is provided with a detachable opening that can form an opening,
The packaging bag is stored in the outer box so that the steam hole faces the upper surface in a flat posture .
The opening is arranged so as to avoid the position facing the vapor hole, the upper surface of the vapor hole is covered with the inner surface of the outer packaging box, and the outer packaging box is used to swell the packaging bag upon heating. The package is characterized in that it is provided with ruled lines that swell the outer box into a cylindrical shape in synchronization .

Next, the invention according to claim 2 of the present invention is as follows:
And the separation opening portion is a packaging body according to claim 1, characterized in that provided in the strip in the lateral direction of the approximate center of the outer box top for venting packaging bag covering the steam holes.

Next, the invention according to claim 3 of the present invention is
The packaging body according to claim 1, wherein the separating and opening portion is provided in a state in which the window is convex upward in the upper direction of the upper surface of the outer packaging box for the steam vent packaging bag covering the steam hole. It is.

Since the outer box for a steam release packaging bag according to the present invention has the above-described configuration, a steam vent provided with a steam hole opened by the steam pressure when the internal steam pressure rises to a predetermined pressure or higher due to heating of a microwave oven or the like. A packaging bag can be stored. And, the structure is simple, it is inexpensive, and it does not take much time for heating.

  In addition, when heating the contents of the steam release packaging bag stored in the steam release packaging bag outer box of the present invention with a microwave oven or the like, the whole steam release packaging bag outer box is placed in the microwave oven. And cooked. And since the outer packaging box for steam release packaging bags does not become hot, it can be easily taken out from the microwave oven after cooking.

  As described above, since the steam-free packaging bag is not directly touched when taking out, there is no burn.

  Further, when the steam release packaging bag housed in the steam release packaging bag outer box is heated, the steam escape hole is covered with the inner surface of the steam release packaging bag outer box.

  For this reason, even when the contents of the steam-extracting packaging bag are ejected, the contents and the like are not scattered or fouled in the microwave oven.

  Further, since the steam release packaging bag is stored in a flat posture in the steam release packaging bag outer box, it can be efficiently heated. And a vapor | steam etc. can escape smoothly from a vapor | steam hole of a vapor | steam extraction packaging bag, without scattering in a microwave oven.

  In addition, since the steam release packaging bag outer box of the present invention covers the steam hole of the stored steam release packaging bag with the inner surface of the steam release packaging bag outer packaging, the contents may be blown out after cooking. There is little fear.

  Further, the outer packaging box for a steam release packaging bag of the present invention is provided with an opening and a ruled line connected to the opening. For this reason, the steam release packaging bag outer box can be formed in a cylindrical shape as the steam release packaging bag expands with heating.

  And with the shrinkage | contraction of a vapor release packaging bag, the steam release packaging bag exterior box can also return to the shape before heating.

The outer packaging box for a steam release packaging bag of the present invention will be described in detail below along the embodiment with reference to the drawings.

  FIG. 1 is a perspective view showing a form of a packaging box of one embodiment in which a steam venting packaging bag is accommodated in an outer packaging box for steam venting packaging bag of the present invention. FIG. 2 is a perspective view showing a state in which the packaging bag housed in the steam wrapping packaging bag outer box of FIG. 1 is heated. Further, FIG. 3 is a plan view showing a planar shape of a blank of the outer box for a steam release packaging bag of FIG.

  The outer packaging box for a steam release packaging bag of the present invention stores a steam release packaging bag in which a stored product such as a liquid, a solid, a solid-liquid mixture, and a viscous body is sealed. And the vapor | steam hole of a vapor release packaging bag is stored in the upper surface.

  In addition, the outer packaging box for the steam release packaging bag of the present invention, when cooking the stored items such as liquid, solid, solid-liquid mixture, and viscous body of the steam release packaging bag in a microwave oven, etc. Place it in the microwave oven with the steam release packaging bag in the steam release packaging bag outer box.

  When placing in the microwave oven with the steam release packaging bag placed in the steam release packaging bag outer box, the knob formed on the upper surface of the steam release packaging bag outer box is pulled.

  Then, after the zipper portion by the cut line is cut off and the opening is formed, the outer packaging box for the steam-release packaging bag is placed in the microwave oven.

  Moreover, the steam release packaging bag accommodated by heating the outer packaging box for the steam release packaging bag placed in the microwave oven expands.

  Then, steam is formed by the openings and ruled lines formed on the upper surface of the outer packaging box for steam-extracting packaging bags, and the ruled lines formed on the left side plate or the right side, bottom plate, and lower side plate connected to the ruled lines. It swells in a cylindrical shape in synchronism with the expansion of the punched packaging bag.

  As the heating is completed, the steam release packaging bag is depressurized to return to the shape substantially before heating, and the steam release packaging bag outer box also returns to the shape placed in the microwave oven.

  When the outer box for the steam release packaging bag is taken out from the microwave oven, the steam hole of the steam release packaging bag stored in the outer box for the steam release packaging bag is covered with the inner surface of the outer box for the steam release packaging bag. Therefore, there is no risk of burns even if steam suddenly occurs.

  Next, as shown in FIG. 1, the steam release packaging bag outer box 60 of the present invention is a flat steam release packaging in which cooked foods such as retort foods are hermetically sealed so that microwave heating is possible. The bag 50 is stored.

  The outer packaging box 60 for the steam release packaging bag is formed with an outer surface from the rectangular front plate 1, bottom plate 2, lower left plate 3, right plate 4, upper front plate 5 and lower front plate 6. .

  Moreover, for opening so that a part of the upper front plate 5 direction can open to the entire lateral width direction of the front plate 1 in a state of covering the steam hole peripheral edge 21 of the vapor vent packaging bag 50 accommodated in the approximate center of the front plate 1. Two zippers 7 having a J-shaped cut are formed.

  And the zipper knob | pick part 8 by the cut line is provided in the left side board 3 direction front-end | tip of the front board 1. As shown in FIG.

  The cutting shape of the zipper 7 by the cutting is not particularly limited to a J shape. For example, a known zipper 7 such as an I-shape, Y-shape, C-shape, or T-shape can be used.

  Further, the front plate 1 has two zippers 7 formed by notches formed in the entire width direction of the front plate 1. The corners of the upper front plate 5 and the lower front plate 6 of the front plate 1 are diagonally formed in the outer direction. Ruled lines 9 to 12 are formed in the state (X-shaped).

  Further, the ruled lines 13 and 14 hanging obliquely in the direction of the lower front plate 6 at both ends of the zipper 7 by cutting in the direction of the lower front plate 6 formed in the entire width direction of the front plate 1 are the left side plate 3 and the right side. It is formed on the face plate 4.

  Further, the bottom plate 2 is formed with ruled lines 15 that connect the ends of the ruled lines 13 and 14 formed on the left side plate 3 and the right side plate 4.

Further, the steam release packaging bag outer box 60 of the present invention is formed with the steam hole 22 of the steam release packaging bag 50 accommodated in the lower direction in which the zipper 7 is formed by cutting in the direction of the lower front plate 6. ing. And the vapor hole 22 is covered with the inner surface of the outer packaging box 60 for vapor release packaging bag without being exposed.

  Further, when heating the contents of the steam release packaging bag 50 stored in the steam release packaging bag outer box 60, the zipper of the zipper 7 formed by cutting formed in the front plate 1 as shown in FIG. By picking the knob portion 8 as described above and pulling it upward, the front plate 1 covers the vapor hole peripheral edge 21 of the vapor release packaging bag 50, and the opening portion 16 has a belt-like shape in the entire width direction at the approximate center of the front plate 1. Formed.

  Next, as shown in FIG. 3, the blank plate 30 of the steam release packaging bag outer box 60 of the present invention has a rectangular bottom plate 2, a left side plate 3, a front plate 1, a right side plate 4, and an adhesive face plate 44 in order. They are connected via ruled lines 23, 24, 25 and 26.

  Further, a lower bottom plate 42 and an upper bottom plate 43 are formed at both upper and lower ends of the bottom plate 2 via ruled lines 27 and 28. A ruled line 48 is formed in the entire width direction of the bottom plate 2 in parallel with the ruled line 27 in the direction of the lower bottom side plate 42.

  The ruled line 48 expands when the steam release packaging bag 50 accommodated in the steam release packaging bag outer box 60 is heated. For this reason, it forms so that the upper side surface of the outer packaging box 60 for steam release packaging bags may always swell stably in a suitable shape.

  The left side plate 3 is also formed with a lower left side plate 40 and an upper left side plate 41 via ruled lines 29 and 30 at both upper and lower ends. A ruled line 48 of the bottom plate 2 and a ruled line 13 connected to the zipper 7 by cutting in the lower front plate direction of the front plate 1 are formed in the direction of the lower left plate 40 of the left side plate 3.

  When the steam release packaging bag 50 housed in the steam release packaging bag outer box 60 is heated, the upper surface of the steam release packaging bag outer box 60 synchronizes with the swelling of the steam release packaging bag 50. And it is formed in order to always swell stably.

  The front plate 1 is also formed with a lower front plate 6 and an upper front plate 5 via ruled lines 31 and 32 at both upper and lower ends. And the zipper 7 by the J-shaped notch for opening is provided so that a part of front plate 1 can be opened in the state which covers the steam hole periphery 21 of the steam release packaging bag 50 accommodated in the approximate center of the front plate 1. Two are formed in parallel to the width direction of the front plate 1.

  Further, the front plate 1 is formed with two zips 7 by cutting. The ruled line 9 is formed so that the corners of the upper front plate 5 corner and the lower front plate 6 of the front plate 1 are diagonal (X-shaped) in the diagonal direction. ~ 12 are formed.

  The ruled lines 9 to 12 formed in the diagonal line state (X shape) are such that when the steam release packaging bag 50 is heated, the upper side surface direction of the front plate 1 of the steam release packaging bag outer box 60 has an appropriate shape. It is formed to always inflate stably.

  The right side plate 4 is also formed with a lower right side plate 46 and an upper right side plate 47 via ruled lines 33 and 34 at both upper and lower ends.

  And the ruled line 14 which connects the zipper 7 by the notch | incision of the lower front plate direction of the front plate 1 and the ruled line 51 formed in the lower direction of the adhesive face plate 44 is formed in the lower right plate 46 direction of the right side plate 4. ing.

  When the steam release packaging bag 50 accommodated in the steam release packaging bag outer box 50 is heated, the upper surface of the steam release packaging bag outer box 60 is the steam release packaging bag 50 as described above. It is formed so as to always swell in a cylindrical shape stably in a synchronized shape.

  When the ruled line 51 formed in the lower direction of the adhesive face plate 44 is also heated with the steam release packaging bag 50 housed in the steam release packaging bag exterior box 60, the steam release packaging bag exterior box The upper side surface of 60 is formed in order to always inflate stably into a cylindrical shape in synchronization with the expansion of the steam release packaging bag 50.

  When the blank plate 30 having the shape described above is manufactured, a front punching die in which cutting edges and ruled line blades (pressing blades that form ruled lines) that are generally used for paper machine processing are embedded can be used.

  Usually, the die is attached to a Thomson punching machine or a Victoria punching machine. Then, it is punched by a flat pressure method, or by a known punching method such as a circular pressure method or a rotary method.

  Moreover, generally, the die used for paper container processing is composed of a male mold and a female mold. Then, in the male mold, a groove is cut with a laser cutting device or the like in accordance with the shape of the box on a plywood or the like, and a ruled line blade for forming a ruled line on paper or the like and a cutting blade for cutting are embedded.

  In the female mold, a press paper, which is a hard paper, is pasted on an iron plate (called a face plate or a cutting plate). And a groove | channel is produced in the part which a ruled line blade hits.

  It can also be produced by an in-line machine equipped with a printing machine and a punching process (Bobst Champlen machine: manufactured by Bobst, Zealand machine: manufactured by Zealand).

  In the production, a punching machine is appropriately selected depending on a material to be punched or a production quantity, a material size, a thickness, and the like.

  Next, after the blank board 30 is produced by the punching machine described above, the outer box 60 for the steam release packaging bag of the present invention is a known sack pasting machine (sack pasting machine) or long pasting machine (long pasting). Cans can be made into sleeves using a box machine.

  Then, a blank board 30 made into a sleeve shape is set in a vertical or horizontal cartoning machine, and a steam vent in which stored items such as a liquid material, a solid material, a solid-liquid mixture, and a viscous body are sealed. The packaging bag 50 is laid down and filled and stored in the outer packaging box 60 for steam release packaging bag.

  Alternatively, without taking a method of filling and storing after forming into a sleeve shape, the steam venting packaging bag 50 in which stored items such as liquid material, solid material, solid-liquid mixture, and viscous material are sealed on one blank plate at a time is laid. A so-called lapland packaging form in which the product is filled and stored in a state of being stored may be used.

  Furthermore, when forming the outer packaging box 60 for steam release packaging bag of the present invention from a folded state into a slave-like flat tube, it can be formed stably and easily by an automatic packaging machine or by manual work. Can do.

As described above, when forming the outer packaging box 60 for steam release packaging bag of the present invention from a folded state into a slave shape, the blank plate 3 is formed on the sack-attached box making machine so that it can be easily raised.
The third ruled line (ruled line 24) and the first ruled line (ruled line 26) of 0 are folded inward by about 120 ° to 180 ° and then returned to the flat state again.

  And an adhesive agent is apply | coated to the back side surface (front side surface of a blank board) of the adhesive face board 44 of the blank board 30 with a gluing apparatus.

  The application is performed in a state where the adhesive on the glue wheel of the gluing device is transferred onto the adhesive face plate 44 of the blank plate 30. At the same time as the application, the right side plate 4 and the adhesive side plate 44 are folded inward from the second ruled line (ruled line 25) and overlap the front plate 1.

  Further, the front side surface (back side surface of the blank plate) of the bottom plate 2 is folded onto the bonding surface plate 44 from the fourth ruled line (ruled line 23) and bonded and bonded. Then, an outer packaging box 60 for a steam release packaging bag that is easy to assemble and easy to assemble when assembling the packaging box is produced.

  Further, as the adhesive, when the blank board 30 is a paperboard, a known adhesive such as vinyl acetate emulsion, polyvinyl alcohol, or polyurethane is used.

  A hot melt adhesive or the like can also be used. Then, an appropriate adhesive and adhesive width or coating amount are selected according to the type, thickness, surface processing state of the paperboard used for the blank board 30, or the stored items or distribution / use conditions stored in the packaging bag. The

  Next, FIG. 4 is a perspective view showing a form of another embodiment in which a steam release packaging bag is accommodated in the steam release packaging bag outer box of the present invention. FIG. 5 is a perspective view showing a state in which the contents stored in the steam release packaging bag stored in the steam release packaging bag outer box of FIG. 4 are heated.

  Further, FIG. 6 is a plan view showing a planar shape of a blank plate of the outer package box for the steam release packaging bag of FIG.

  As shown in FIG. 4, the outer box 80 for a steam release packaging bag of the present invention is a state in which a flat steam release packaging bag 70 in which a stored item such as a liquid, a solid, a solid-liquid mixture, or a viscous body is sealed is laid. Store in. And the vapor hole 22 of the vapor release packaging bag 70 is accommodated with the upper surface.

  In addition, the steam release packaging bag outer box 80 of the present invention is used when cooking stored items such as liquids, solids, solid-liquid mixtures, and viscous bodies of the steam release packaging bag 70 in a microwave oven or the like. Is placed in the microwave oven with the steam release packaging bag 70 in the steam release packaging bag outer box 80.

  When placing the steam release packaging bag 70 in the steam release packaging bag outer box 80 in the microwave oven, the knob 8 formed on the upper surface of the steam release packaging bag outer box 80 is used. pull.

  And after cutting off the part of the zipper 7 by cutting and forming the opening part 16, the steam-wrapping packaging bag exterior box 80 is placed in the microwave oven.

  Moreover, the steam release packaging bag 70 accommodated by the heating of the outer packaging box 80 for steam release packaging bag placed in the microwave oven expands.

  The steam release packaging bag 70 is formed by the opening 16 formed on the upper surface of the outer packaging box 80 for steam release packaging bag, the ruled lines 57 and 58, and the ruled line hanging from the lower front plate 6 connected to the ruled line. The outer packaging box 80 for steam release packaging bag swells in a cylindrical shape in synchronism with the bulge.

  As the heating is finished, the steam release packaging bag 70 is depressurized to return to the shape substantially before heating, and the steam release packaging bag outer box 80 is also substantially returned to the shape placed in the microwave oven.

  Then, when taking out the steam release packaging bag outer box 80 from the microwave oven, the steam release packaging bag without exposing the steam hole 22 of the steam release packaging bag 70 accommodated in the steam release packaging bag outer box 80 is exposed. The outer packaging box 80 is covered with the inner surface. For this reason, there is no risk of burns even if steam suddenly occurs.

  Further, as shown in FIG. 4, the outer packaging box 80 for steam venting packaging bag according to the present invention has a rectangular front plate 1, bottom plate 2, left side plate 3, right side plate 4, upper front plate 5, and lower front plate 6. An outer surface is formed from the outer side.

  Further, the front plate 1 has a J-shaped notch for opening so that a part of the front plate 1 in the direction of the upper front plate 5 can be opened in a state in which the vapor hole periphery 21 of the vapor release packaging bag 70 is covered. It is formed on the left and right edges in the width direction of the face plate 1. And the zipper knob | pick part 8 is formed in the center position on the ruled line 32 currently formed in the upper direction front plate 5 direction tip of the front plate 1. As shown in FIG.

  The cut shape of the zipper 7 is not particularly limited to a J shape. For example, a known zipper 7 such as an I-shape, Y-shape, T-shape, or C-shape can be used.

  Further, a cut line 56 for connecting the zipper 7 by the left and right cuts is formed at the front end of the front plate 6 in the lower front plate 6 direction by the cuts formed on the left and right in the width direction of the front plate 1. And the upper surface of the steam hole 22 formed in the steam release packaging bag 70 in the lower front plate direction in which the cut line 56 is formed is covered with the inner surface of the steam release packaging bag outer box 80 without being exposed. Yes.

  Further, ruled lines 57 and 58 that hang in the direction of the lower front plate 6 are formed at both ends of the cut line 56.

  A steam hole 22 of the steam release packaging bag 70 is formed in the direction of the lower front plate 6 where a cut line 56 connecting the zipper 7 by the notch is formed. And the upper surface of the steam hole 22 is covered with the inner surface of the outer packaging box 80 for steam release packaging bag.

  Further, the lower front plate 6 is formed with ruled lines 59 and 61 that are connected to two ruled lines 57 and 58 that are formed to hang down in the direction of the lower front plate 6 of the front plate 1 so as to be inclined inward. Yes.

  And when heating the contents of the steam release packaging bag 70 stored in the steam release packaging bag outer box 80, as shown in FIG. 5, the center position of the front plate 1 in the front direction of the upper front plate 5 as shown in FIG. The zipper knob 8 formed on the ruled line 32 is opened to open the zipper 7 by cutting.

  Then, the opening 16 is formed in the front plate 1 by pulling the zipper knob 8 upward. The upper surface of the steam hole 22 of the steam release packaging bag 70 is covered with the inner surface of the steam release packaging bag exterior box 80 without being exposed in the direction of the lower front plate 6 where the opening 16 is formed.

  Next, as shown in FIG. 6, the blank 90 of the outer packaging box 80 for steam release packaging bag of the present invention has a rectangular left side plate 3, front plate 1, right side plate 4, bottom plate 2 and adhesive face plate 44 in order. 23, 24, 25, and 26 are connected.

  Further, the front plate 1 has a J-shaped notch Z for opening so that a part of the front plate 1 in the direction of the upper front plate 5 can be opened with the steam hole 22 peripheral edge 21 of the steam release packaging bag 70 covered. It is formed on the left and right edges of the front plate 1 in the width direction.

  Further, the zipper knob 8 is formed on the approximate center position of the ruled line 32 formed at the tip of the upper front plate 5 in the direction.

  Further, a cut line 56 for connecting the zipper 7 by cutting is formed at the left and right ends of the lower zipper 7 by cutting formed at the left and right edges of the front plate 1 in the width direction. Further, ruled lines 57 and 58 that hang in the direction of the lower front plate 6 are formed at both ends of the cut line 56.

  Further, the lower front plate 6 is formed with ruled lines 59 and 61 that are connected to two ruled lines 57 and 58 that are formed so as to hang down in the direction of the lower front plate 6 of the front plate 1 in an obliquely inward direction. .

  The ruled lines 57, 58, 59, 61 formed on the front plate 1 and the lower front plate 6 are used to release steam when the steam release packaging bag 70 housed in the steam release packaging bag outer box 80 is heated. The upper side surface of the packaging bag outer box 80 is formed so as to be constantly inflated into an appropriate shape.

As described above with reference to FIG. 3, the blank plate 90 is formed by a known sack pasting box or long past box making machine or box making machine. In the same manner, the outer packaging box 80 for the steam release packaging bag is created, and the steam release packaging bag 70 filled with the stored items and sealed is stored.
Further, as the blank plates 30 and 90 shown in FIGS. 3 and 9, decorative paperboard sheets such as paperboard, micro flute, and E flute, plastic sheets, and the like can be used.

  When the blank plates 30 and 90 are paperboards, for example, ordinary paperboards such as ivory paper, postcards, double-sided card papers, Manila cardboards, white paperboards that are white balls can be used.

  Also, depending on the size of the steam-decomposable packaging bags 70 and 50, the contents to be stored, the distribution / use conditions, or the intended use, paper using used paper as the intermediate layer of paper, yellow balls, chip balls, colored balls (double-sided craft balls) Lower grade paper such as single-sided craft balls) can also be used.

  In addition, when cosmetics are required for the outer packaging boxes 60 and 80 for steam release packaging bags of the present invention, printing processing, foil pressing processing, flocking processing or bulging processing (raising processing using foamed resin ink or male processing) is performed on the paperboard. Embossing with a female die) is performed.

  In addition, the printing applied to the front side of the paperboard is a printing method such as letterpress printing, offset printing, gravure printing, flexographic printing, or screen printing, which is used to print the product photo, description, expiration date, etc. The display that contributes to the purchase motivation of can be performed.

  Then, a printing method is appropriately selected depending on the production quantity (lot) or application of the paperboard to be printed, the design, the surface material to be printed, and the like.

  Furthermore, surface processing for protecting the printed surface subjected to the printing process according to distribution conditions or over-the-counter sales conditions is also performed.

  The ink for offset printing uses a vehicle that combines synthetic resin, drying oil, and high-boiling solvent, and the composition is adjusted according to various conditions such as gloss, friction resistance, setability, and drying time. A known ink is used in consideration of interfacial suitability related to the balance with the plate surface with water.

  For example, when the ink is an oil-based ink type (referring to an ink mainly composed of an oxidation polymerization type drying oil), a synthetic resin, a drying oil (vegetable oil), a solvent, an auxiliary agent and the like are required as a vehicle.

  Usually, rosin-modified phenol, petroleum resin, alkyd resin, or the like is used as the synthetic resin. In addition, as the drying oil, linseed oil, drill oil, soybean oil, synthetic drying oil and the like are used. Further, a high boiling point petroleum solvent or the like is used as the solvent.

  Further, as the auxiliary agent, a compound or the like is used as a viscosity adjusting agent, and a drying agent (dryer), a drying inhibitor, or the like is used as a drying adjusting agent.

  In addition, gravure printing inks include color materials composed of fine particle pigments and dyes that give color to the ink, a resin that is fixed to the print body, and a solvent that can transfer the appropriate amount of ink from the printing plate. And an auxiliary agent composed of a surfactant and the like. In particular, the colorant is preferably a pigment with good weather resistance.

  Auxiliary agents composed of the above surfactants and the like are used for the purpose of improving the dispersibility of the coloring material, improving the coloring property, preventing precipitation, and improving the fluidity. The solvent dissolves the resin to be fixed to the printed body. And many organic solvents are used.

  In the case of the gravure printing method, an organic solvent type ink type is used. For example, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, polymethyl is used as the resin in which the gloss material is dispersed. A thermoplastic polymer resin such as methacrylic, polyurethane, polyester, polyamide, nitrocellulose, or cellulose derivative, or a thermosetting polymer resin such as melamine or urea can be used. And it selects from these suitably.

  Furthermore, the organic solvent for dissolving the resin is not particularly limited as long as the resin can be dissolved or dispersed.

  For example, esters such as ethyl acetate and butyl acetate, ketones such as methyl ethyl ketone and methyl isobutyl ketone, and aromatic hydrocarbons such as toluene and xylene can be used singly or arbitrarily.

  Furthermore, in order to make the printed surface more beautiful and beautiful, the gloss overprint varnish or the front side of the paperboard is printed on, for example, polyethylene (PE) or polypropylene (PP) or polyethylene terephthalate (PET). Laminate resin films of about 0.015-0.02mm such as polyimide (PI), polyacrylonitrile (PAN), polyvinyl chloride (PVC), etc., and print using a flat pressure press or roll press The surface can be polished.

In addition, UV curing using UV offset printing machine with acrylic and unsaturated polyester prepolymers on the front side of paperboard, monomer components such as acrylic and styrene, photopolymerization initiators and other additives as composition components Glossiness and friction resistance can be imparted by printing the type gloss.

  And since the rubbing which generate | occur | produces at the distribution | circulation process and use of goods can be prevented, this high value-added exterior box excellent also from the physical property side can be produced.

  Further, the gloss and gloss of the surface can be increased by an extrusion coating process in which a resin is heat-melted and applied on the front side of the paperboard, or a lamination process in which a film is laminated.

  In addition, the gloss and gloss can be increased by press coating or the like in which a resin dissolved resin such as vinyl acetate or vinylidene chloride is coated with a rubber roll and then heat-pressed to an endless steel belt for a certain period of time.

  Further, embossing (embossing or embossing) for imparting cosmetic or decorative properties to the surface of the paperboard is a flat pressure type or a circular pressure type for producing a blank board having a predetermined ruled line (crease line) and shape from the paperboard. Alternatively, it can be applied on a rotary punching machine (punching ruled line processing machine).

  Moreover, it can also apply on the foil stamping machine which performs foil stamping. Furthermore, embossing can be performed simultaneously with foil stamping on a foil stamping machine.

  Embossing is also called an embosser. As described above, there are a method in which die is formed by a hydraulic method by vertical movement and a method in which pressure embossing is performed by embedding one of two rotating rolls.

  In the method of performing the molding by the water pressure method, a cardboard called a press board is used instead of the male and female dies. Of the two rolls, a roll molded to one roll is generally called a paper roll or a cotton roll.

  Then, a male die heated while applying humidification (water or steam) to the paper roll or cotton roll is pressed over little by little while being called a paper roll or cotton roll, and is molded into the roll.

  Further, the paperboard for producing the blank boards 30 and 90 is given water resistance, oil resistance, chemical resistance, etc. depending on conditions used, for example, storage method, storage period, contents, distribution conditions, store sales conditions, and the like. The

  When water resistance is imparted to the paperboard at the time of papermaking, for example, the added waterproofing agent is usually an internally added waterproofing agent that is internally added to the pulp suspension before papermaking.

  As a method for imparting water resistance, heat resistance, or chemical resistance to the paperboard, there are a method of performing paperboard processing during papermaking and a method of impregnating or coating the paperboard processed.

  Examples of wet paper strength enhancers include urea-formaldehyde resin, melamine-formaldehyde resin, epoxidized polyamide resin, polyethyleneimine resin, dialdehyde starch, and glyoxalized polyacrylamide resin.

  The amount of the water-resistant agent added varies depending on the type of pulp to be used, the type of chemical, and the intended water resistance.

  In addition, as secondary processing chemicals that impart water resistance to paperboards that have been processed, waxes such as carnauba wax, paraffin wax, polyethylene wax, etc., which have an excellent balance in price or performance, are often used. .

  Further, a polymer solution or emulsion such as polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, ethylene-vinyl acetate copolymer, vinylidene chloride-vinyl acetate copolymer insoluble in water is used.

  Also, roll paper coaters, air knife coaters, metering bar coaters, fountain blade coaters, bevel blade coaters, short dwell coaters, curtain coaters, etc. are used for processing water-resistant or chemical-resistant agents on the paperboard processed above. it can.

  And although it does not specifically limit, a water-resistant agent, a chemical-resistant agent, etc. are applied to the front side surface or back side surface or both side surfaces of the paperboard using any appropriate coating machine.

  In order to impart oil resistance to paperboard, it is usually necessary to make the sea surface tension of the processed surface smaller than the surface tension of the oily substance.

  A chemical having such a function is referred to as an oil-resistant agent, and a fluorine-based oil-resistant paper is generally used, as known as oil-resistant paper, mainly using a fluorine compound such as a perfluorinated hydrogen acrylate or phosphate ester. It is treated with an agent.

  In addition, when applying the oil proofing agent to the paperboard that has been processed, the roll coater, the air knife coater, the metering bar coater, the fountain blade coater, the bevel blade coater, the short dwell coater, the curtain coater and the like are not particularly limited. Using the appropriate coating machine, it is applied to the front side, back side or both sides of the paperboard.

  Further, by forming a resin layer on the inner surface of the paperboard to which water resistance or oil resistance is imparted, functionality such as water resistance or oil resistance can be further improved.

  The resin layer is formed by, for example, polyethylene (PE), low density polyethylene (LDPE), high density polyethylene (HDPE), polyvinyl chloride (PVC), polyfluorinated ethylene (PTFE), polyvinylidene chloride (PVDC), polycarbonate. (PC), nylon 6 (NY), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene terephthalate (PET), acrylonitrile (AN), linear low density polyethylene (LLDPE), polyacrylonitrile (PAN), impact resistance Resins such as reactive polystyrene (HIPS) and polyacrylonitrile (PAN) can be used.

  Further, the resin layer applied to the inner surface of the paperboard is applied by either an extrusion coating process in which a thermoplastic resin or the like is melted and applied, or a lamination process in which a film is bonded.

  Examples of the laminating process include wet laminating, dry laminating, non-solvent laminating, knee laminating, and extrusion laminating. Then, an appropriate laminating method is selected.

Next, the steam release packaging bags 70 and 50 accommodated in the outer packaging boxes 80 and 60 for the steam release packaging bag of the present invention are packaging bags in which cooked or semi-cooked foods are sealed, and a cooking device such as a microwave oven. Gases such as water vapor inside the steam release packaging bodies 70 and 50 that are pressurized with heating inside can be smoothly released by the steam release means formed in the steam release packaging bags 70 and 50.

  Steam-wrapped packaging bags are produced and used in large quantities due to the development of food processing technology and packaging technology, the spread of microwave ovens, and the like.

  The microwave oven vibrates water molecules contained in food by high-frequency (ultra-high frequency) irradiation, and heats the food with frictional heat generated by the vibration of the water molecules.

  Water vapor is generated along with the high-frequency heating by the microwave oven, and the normal sealed bag formed of the plastic film expands and bursts due to the water vapor.

  Therefore, in a conventional microwave oven pouch, in order to discharge water vapor generated inside the bag by high-frequency heating of the microwave oven to the outside of the bag, a part of the pouch body is opened during heating, or an escape hole is provided in the pouch body. ing.

  As the steam release packaging bags 70 and 50 accommodated in the outer packaging boxes 80 and 60 for steam release packaging bags of the present invention, for example, steam release packaging bags 70 and 50 as shown in FIGS. It is used.

  As shown in FIGS. 7A and 7B and FIG. 8, the steam release packaging bag is formed by laminating a front side laminated film 61 and a back side laminated film 62 which are laminated films.

  Then, as shown in FIGS. 7A, 7B and 8, the periphery of the end portion is heat-sealed by heat sealing with the heat-adhesive sealant layers 63 and 64 laminated on the overlapped inner surface. Thus, a bottom seal portion 65 and side seal portions 66 on both sides are formed. Then, storage items such as a liquid material, a solid material, and a solid-liquid mixture can be stored from the opening 68.

  The back-side laminated film 62 has a V-shaped folded portion end 69 on the back-side laminated film 62 in parallel with the bottom seal portion 65 on the bottom seal portion 65 side over the entire width of the steam release packaging bags 70 and 50. Is formed.

  Further, an outer folded portion 72 and an inner folded portion 71 are formed at the end of the folded portion. And inside the outer folding | returning part 72 and the inner side folding | returning part 71, the peelable tape material 67 which has easy peelability is inserted over the whole breadth of the steam release packaging bag in parallel with the folding | returning part edge part.

  Further, the peelable tape material 67 (shown in FIG. 12) is formed on an adhesive resin layer 73 that exhibits adhesiveness to the sealant layers 63 and 64 of the front side and back side laminated films 61 and 62, and the sealant layers 63 and 64. On the other hand, a peelable tape material 67 is formed from a two-layer structure of a peelable resin layer 74 that exhibits peelability by vapor pressure.

  And it is heat-sealed by the center pattern seal | sticker part 75 of reverse concave shape, the right-and-left pattern seal parts 76 and 77, and the side seal parts 66 and 66, and interposes.

  Moreover, as shown in FIG. 8, the upper end part area | region of the peelable tape material 67 is extended long upwards rather than the inner side folding | returning part 71 folded in V shape. And the upper region (upper side of the drawing) of the peelable tape material 67 which is the extended portion is the back side laminated layer outside the outer folded portion 72 of the back side laminated film 62 facing the adhesive resin layer surface of the upper end region. The sealant layer 64 on the inner surface of the film 62 is heat sealed.

  And it adheres in a state where peeling by vapor pressure is impossible, and the lower region (the lower side of the drawing) region of the peelable tape material 67 is heat sealed against the sealant layer surface of the inner surface of the back side laminated film facing it. In addition, the center pattern seal portion having an inverted concave shape and the unsealed portions of the left and right pattern seal portions are not bonded.

  7 and 8, the lower end region of the peelable tape material 67 is the back side lamination of the inner surface of the seal portion 78 provided inside the unsealed portion of the central seal portion 75. The film 62 is heat-sealed on the surface of the sealant layer 64.

  In this way, the adhesive resin layer surface of the peelable tape material 67 is heat-sealed so that it cannot be peeled off by the vapor pressure on the sealant layer 64 on the inner surface of the back side laminated film 62 on the outer side of the V-shaped folded portion 71 of the inner folded portion 71. Has been.

  And the peelable resin layer surface of the peelable tape material 67 is heat-sealed to the sealant layer 64 on the inner surface of the back side laminated film 62 inside the V-shaped folded back of the inner folded portion so as to be peelable by vapor pressure.

  In addition, in the unsealed portion 81 region of the central pattern seal portion 75 of the steam release packaging bag, the back side laminated film 62 of the outer folded portion 72 and the peelable tape material 67 on the inner surface of the outer folded portion 72, A reverse vent-shaped cut-out line steam vent hole 22 is provided therethrough.

  Since the shape of the steam release hole 22 is a reverse concave shape having a short straight line that is oblique or vertically downward at both ends of a straight line parallel to the straight line of the outer folded end, the opening diameter is three-dimensional. It has a structure in which water vapor is smoothly discharged.

  Further, the steam vent hole 22 of the steam vent packaging bag is sealed and sealed by the central pattern seal portion 75 at room temperature (normal atmosphere) before filling the contents into the packaging bag and after filling and sealing and packaging. Yes.

  Then, as shown in FIG. 9 or FIG. 10, in the heating chamber of the heating means such as a microwave oven, the steam venting packaging bag is horizontally mounted with the outer folded portion 72 side as the upper surface while being stored in the steam vent packaging bag outer box. By placing and heating, the internal pressure such as atmospheric pressure and vapor pressure in the vapor vent packaging bag is increased, and the vapor vent packaging bag is inflated to generate an expansion force.

  Due to the expansion force, the central pattern seal portion 75 undergoes seal peeling and retreat, and the surface of the outer folded portion 72 of the back side laminated film 62 and the surface of the peelable resin layer 74 of the peelable tape material 67 are peeled off. The inside of the packaging bag, the unsealed part, and the outside communicate with each other.

  Then, the opening diameter is expanded three-dimensionally, the heated steam or gas in the expanded packaging bag is released from the steam vent hole 22, and the contents are heated or cooked without rupturing the packaging bag. It is something that can be done.

  Further, even if the steam vent packaging bag has the outer folded portion of the packaging bag, that is, the steam vent hole 22 on the lower side, the film ends on both sides sandwiching the cut line through which the steam vent hole 22 extends. It is a steam vent packaging bag having a structure in which the edges are hermetically sealed to be in a closed state, and the contents are difficult to leak from the steam vent hole 22 portion, and the contents have a check effect.

As the peelable tape material 67, for example, as shown in FIG. 12, an adhesive resin layer 73 showing adhesiveness to the sealant layer on the inner surface of the packaging bag and the vapor pressure of steam generated by heating the packaging bag are used. The tape material etc. which consist of two layers with the peelable resin layer 74 which shows easy peelability can be mentioned.

  As the adhesive resin layer 73 exhibiting adhesiveness to the sealant layer on the inner surface of the packaging bag, the heat-sealable adhesive thermoplastic resin constituting the inner surface sealant layer of the laminated films 1 and 2 described above is used as it is. A layer made of a propylene-based polymer (copolymer or terpopolymer) called CPP or a linear low-density polyethylene called LLDPE or LLD is preferably used. The thickness is often 20 to 150 μm.

  Examples of the peelable resin layer 74 exhibiting easy peelability with respect to the sealant layer on the inner surface of the packaging bag include, for example, block polypropylene copolymers, random polypropylene copolymers, ethylene copolymers such as ethylene / vinyl acetate, and the like. Are preferably used. As the ethylene-based copolymer, a copolymer having an ethylene component content of 85 to 98% by weight is particularly desirable.

  Here, a typical example of the block polypropylene-based copolymer is a polypropylene-polyethylene block copolymer, and a typical example of the random polypropylene-based copolymer is a propylene-ethylene random copolymer.

  The method for laminating the adhesive resin layer 73 and the peelable resin layer 74 is not limited, and examples thereof include dry lamination, extrusion coating, and coextrusion.

  In addition, the laminated films 61 and 62 constituting the steam-extracting packaging bag are constituted by laminating at least a base film layer and a sealant layer.

  The base film layer is a layer that serves as a base material for a steam-free packaging bag, and is a sheet or film, such as polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate). A relatively heat-resistant plastic film or sheet that is usually used as a packaging material, such as phthalate), polyamide (nylon-6, nylon-66, polyimide, etc.), or a copolymer of these polymers can be used.

  The base film layer is a subsidiary material depending on required quality, resistance, use conditions, etc., for example, a stabilizer such as a plasticizer or an antioxidant, an ultraviolet absorber, an inorganic pigment, an organic pigment, a surfactant. Additives such as anti-aging agent, mold release agent and dye can be added.

  And it selects suitably as needed, and after adding to the resin used and stirring uniformly, it forms with an extruder etc. It is selected as appropriate, and is formed by an extruder or the like after being uniformly stirred with the resin to be used.

  Further, the above-mentioned auxiliary materials are usually known ones. For example, when coloring a base film, a colored pellet (colored pellet), a masterbatch, a dry color, etc. are used.

  In addition, the master batch is obtained by dispersing a pigment in a high concentration in the same kind of material as the resin to be colored, and is widely used because it is easy to measure and handle.

The dry color is obtained by surface-treating a powdery material to improve dispersibility, and is used for polyethylene (PE), polystyrene (PS), polyamide (PA) acrylic resin, and the like.

  Furthermore, since plastics are generally very excellent in electrical insulation, charging easily occurs when they are rubbed or overlapped. As a result, dust may adhere to it, and the appearance may be lost.

  An antistatic agent is used to prevent this. Moreover, there are a kneading type and a coating type as a method of use, but the kneading type is superior in sustaining the prevention effect. As the known antistatic agent, nonionic and cationic ones are mainly used.

  Further, the ultraviolet absorber is used to absorb ultraviolet energy (light of 400 nm or less) and consume it for the internal change of the absorbent molecule, so that the energy is not exerted on the polymer.

  Furthermore, the surface of the base film layer can be subjected to surface modification such as corona discharge treatment or anchor coating treatment, thereby improving adhesion with a sealant layer 32 and the like described later.

  Moreover, a printing layer (not shown) can be formed in the surface or back surface of a base film layer as needed.

  In the same way as when printing on general plastic film bags, the printing layer is designed to improve the sales promotion effect of products on the inner surface of the base film layer, taking into account the friction resistance and weather resistance of the ink. It is preferable to provide a printing layer with a beautiful pattern.

  As the printing ink for forming the printing layer, there are a coloring material composed of pigments and dyes of fine particles that give color to the ink, a resin that is fixed to the printing body, and a solvent that can transfer an appropriate amount of ink from the printing plate. And an auxiliary agent composed of a surfactant and the like. In particular, the colorant is preferably a pigment with good weather resistance.

  Auxiliary agents composed of the above surfactants and the like are used for the purpose of improving the dispersibility of the coloring material, improving the coloring property, preventing precipitation, and improving the fluidity.

  Further, when printing on the base film layer, if necessary to improve the adhesion between the base film layer and the printing ink, the surface of the base film layer on which the printing layer is provided is treated with ozone, corona. Pretreatment such as treatment is preferably performed. Further, an anchor coating agent or the like may be coated.

  Examples of the anchor coating agent include isocyanate-based (urethane-based), polyethyleneimine-based, polybutadiene-based, and organic titanium-based anchor coating agents, or polyurethane-based, polyacrylic-based, polyester-based, epoxy-based, and polyvinyl acetate. Series, cellulosic and other laminating adhesives can be used.

  As a method for coating the anchor coating agent, a known gravure roll coating method, bar coating method, reverse roll coating method, or the like can be used.

The heat seal layers 63 and 64 are provided as adhesive layers when forming the packaging bag or the like. Any resin that has heat-fusibility can be used. For example, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-methacrylic acid copolymer, ethylene-methacrylic acid ester copolymer, ethylene-acrylic. Resins such as acid copolymers, ethylene-acrylic acid ester copolymers, and metal cross-linked products thereof are used.

  In consideration of retort sterilization suitability in food packaging, polypropylene resin can be used more preferably.

  And although thickness is decided according to the objective, generally it is the range of 15-200 micrometers. Moreover, as a forming method, it is common to use a dry laminating method or the like in which a film-like material made of the above resin is bonded using an adhesive such as a two-component curable urethane resin. Can be stacked.

  Moreover, when it is necessary to improve the drop strength, puncture strength, and gas barrier properties of the packaging bag, an intermediate layer can be interposed between the base film layer and the sealant layer.

  Furthermore, when a gas barrier property is required for the steam-release packaging bag, for example, a gas barrier laminated film as shown in FIG. 11 can be used. And 95 of the lamination | stacking film | membrane 61 (62) shown in FIG. 11 is a gas barrier lamination film layer.

  The base 91 in the gas barrier laminated film 95 is a film made of a plastic material.

  A primer layer 92 made of a composite of trifunctional organosilane, acrylic polyol, isocyanate compound, etc., a vapor-deposited thin film layer 93 made of an inorganic oxide having a thickness of 5 to 300 nm, and a gas barrier coating layer 94 are sequentially laminated thereon. ing. In this case, the gas barrier coating layer 94 may not be provided depending on the required quality.

  The substrate 91 is a plastic material, and a transparent film is preferable in order to make use of the transparency of the deposited thin film layer. For example, a polyester film such as polyethylene terephthalate (PET) or polyethylene naphthalate, a polyolefin film such as polyethylene or polypropylene, a polystyrene film, a polyamide film, a polyvinyl chloride film, a polycarbonate film, a polyacrylonitrile film, or a polyimide film is used.

  And any of extending | stretching and unstretching may be sufficient, and what has mechanical strength and dimensional stability is good. These are processed into a film and used. In particular, polyethylene terephthalate arbitrarily stretched in the biaxial direction is preferably used.

  In addition, various known additives and stabilizers such as an antistatic agent, an anti-ultraviolet agent, a plasticizer, and a lubricant may be used on the surface of the base material 91 to improve the adhesion to the thin film. Therefore, corona treatment, low temperature plasma treatment, ion bombardment treatment may be performed as pretreatment, and chemical treatment, solvent treatment, etc. may be performed.

  The thickness of the substrate 91 is not particularly limited, but is suitable as a packaging material, may be laminated with other layers, a primer layer 92 and a vapor-deposited thin film layer 93 made of an inorganic oxide, a gas barrier coating Considering the workability when forming the layer 94, it is practically in the range of 3 to 200 μm and preferably 6 to 30 μm depending on the application.

The primer layer 92 is provided on a base material 91 made of a plastic material, improves adhesion between the base material 91 and the vapor-deposited thin film layer 93 made of an inorganic oxide, and after heating such as retort sterilization in the food packaging field. The purpose is to prevent the occurrence of delamination.

  It has been found that a trifunctional organosilane or a hydrolyzate thereof, and a composite of an acrylic polyol and an isocyanate compound can be used as a primer resin for achieving the above-mentioned object.

Further, the composite constituting the primer layer 92 will be described in detail. The trifunctional organosilane is a general formula R′Si (OR) ₃ such as ethyltrimethoxysilane, vinyltrimethoxysilane, glycidoxypropyltrimethoxysilane (where R ′ is an alkyl group, vinyl group, glycidoxypropyl group, etc.) , R is an alkyl group or the like), or a hydrolyzate thereof.

  Of the above, glycidoxytrimethoxysilane, epoxycyclohexylethyltrimethoxysilane and the like in which R ′ contains an epoxy group are particularly preferable. A method for obtaining a hydrolyzate can be obtained by a known method such as a method of performing hydrolysis by directly adding an acid, an alkali or the like to a trifunctional organosilane.

  An acrylic polyol is a polymer compound obtained by polymerizing an acrylic acid derivative monomer, or a polymer compound obtained by copolymerizing an acrylic acid derivative monomer and other monomers, with a hydroxyl group at the terminal. It is made to react with the isocyanate group of the isocyanate compound added later.

  Among the above, preferred are those obtained by polymerizing acrylic acid derivative monomers such as ethyl methacrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, and hydroxybutyl methacrylate alone, and acrylic polyols copolymerized by adding other monomers such as styrene. Used. In consideration of the reactivity with the isocyanate compound, the hydroxyl value is preferably between 5 and 200 (KOHmg / g).

  The mixing ratio of the acrylic polyol and the trifunctional organosilane is preferably in the range of 1/1 to 100/1 by weight, more preferably in the range of 2/1 to 50/1.

  The dissolving and diluting solvent is not particularly limited as long as it can be dissolved and diluted. For example, esters such as ethyl acetate and butyl acetate, alcohols such as methanol, ethanol and isopropyl alcohol, and ketones such as methyl ethyl ketone , Aromatic hydrocarbons such as toluene and xylene, etc. can be used alone or in any combination.

  However, since an aqueous solution of hydrochloric acid or the like may be used to hydrolyze trifunctional organosilane or the like, it is more preferable to use a solvent in which isopropyl alcohol or the like and ethyl acetate that is a polar solvent are arbitrarily mixed as a cosolvent.

In addition, a reaction catalyst may be added to accelerate the reaction when the trifunctional organosilane and acrylic polyol are blended. The catalyst to be added is a tin compound such as tin chloride (SnCl ₂ , SnCl ₄ ), tin oxychloride (SnOHCl, Sn (OH) ₂ Cl ₂ ), tin alkoxide and the like in terms of reactivity and polymerization stability. Is preferred.

These catalysts may be added directly at the time of blending, or may be added after being dissolved in a solvent such as methanol. If the addition amount is too small or too large, the catalytic effect cannot be obtained, so the molar ratio with respect to the trifunctional organosilane is preferably in the range of 1/10 to 1/10000, and more preferably 1/100 to 1 More preferably, it is in the range of / 2000.

  Furthermore, the isocyanate compound to be mixed is added in order to improve the adhesion with the base material 17 or the vapor-deposited thin film layer 19 made of an inorganic oxide by a urethane bond formed by reacting with an acrylic polyol. Acts as a curing agent.

  To achieve this, as isocyanate compounds, monomers such as aromatic tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), aliphatic xylene diisocyanate (XDI), and hexadiisocyanate (HMDI), These polymers and derivatives are used, and these are used alone or as a mixture.

  Further, the blending ratio of the acrylic polyol and the isocyanate compound is not particularly limited, but if the isocyanate compound is too small, the curing may be poor, and if it is too much, blocking or the like occurs, which causes a processing problem. is there.

  Therefore, the blending ratio of the acrylic polyol and the insocyanate compound is preferably that the NCO group derived from the isocyanate compound is 50 times or less of the OH group derived from the acrylic polyol, and particularly preferably the NCO group and the OH group are blended in an equivalent amount. This is the case. As a mixing method, a known method can be used and is not particularly limited.

Furthermore, in order to improve the liquid stability during preparation of the composite, it is possible to add a metal alkoxide or a hydrolyzate thereof. The metal alkoxide is a general formula M (OR) _n (M is Si, Al, Ti, Zr) such as tetraethoxysilane [Si (OC ₂ H ₅ ) ₄ ], tripropoxy aluminum [Al (OC ₃ H ₇ ) ₃ ], etc. Or a metal such as R, an alkyl group such as CH ₃ or C ₂ H ₅ ), or a hydrolyzate thereof.

  Among these, tetraethoxysilane, tripropoxyaluminum, or a mixture of both is preferable because it is relatively stable in an aqueous solvent. The metal alkoxide hydrolyzate may be hydrolyzed with the trifunctional organosilane, or a metal alkoxide hydrolyzate may be added.

  The mixing ratio of the trifunctional organosilane and the metal alkoxide is preferably in the range of 10: 1 to 1:10 in terms of molar ratio from the viewpoint of liquid stability. Preferably, both are blended in equimolar amounts.

  The composite film is obtained by hydrolyzing such trifunctional organosilane in advance or by hydrolyzing trifunctional organosilane together with metal alkoxide (in this case, the above-described reaction catalyst may be used. ) Is mixed with an acrylic polyol or an isocyanate compound to prepare a composite solution, or trifunctional organosilane and acrylic polyol are mixed in advance in a solvent (at this time, the above-mentioned reaction catalyst and metal alkoxide may be added. No) Hydrolysis reaction.

  Alternatively, the base material 17 may be a mixture of trifunctional organosilane and acrylic polyol (in this case, the above-mentioned reaction catalyst or metal alkoxide may be added) to which a composite solution is prepared by adding an isocyanate compound. Form by coating.

Various additives such as tertiary amines, imidazole derivatives, metal salt compounds of carboxylic acids, quaternary ammonium salts, quaternary phosphonium salts and other curing accelerators, phenolic, sulfur-based, phosphite-based, etc. It is also possible to add an antioxidant, a leveling agent, a flow regulator, a catalyst, a crosslinking reaction accelerator, a filler and the like.

  The thickness of the primer layer 92 is not particularly limited as long as a uniform coating film can be formed, but generally it is preferably in the range of 0.01 to 2 μm.

  On the other hand, if the thickness is less than 0.01 μm, it is difficult to obtain a uniform coating film and the adhesion may be lowered. When the thickness exceeds 2 μm, the coating film cannot be kept flexible because it is thick, and there is a possibility that the coating film may crack due to external factors, which is not preferable. Particularly preferred is a range of 0.05 to 0.5 μm.

  In addition, as a method for forming the primer layer 92, for example, a known printing method such as an offset printing method, a gravure printing method, a silk screen printing method, or a known coating method such as roll coating, knife edge coating, or gravure coating is used. Can do. The drying conditions may be those generally used.

  The vapor-deposited thin film layer 93 made of an inorganic oxide is made of a vapor-deposited film of an inorganic oxide such as aluminum oxide, silicon oxide, tin oxide, magnesium oxide, or a mixture thereof, and has transparency and a gas barrier such as oxygen and water vapor. What is necessary is just to have.

  Among these, aluminum oxide and silicon oxide are particularly preferable. However, the vapor-deposited thin film layer 3 of the present invention is not limited to the inorganic oxide described above, and any material that meets the above conditions can be used.

  The optimum thickness of the vapor-deposited thin film layer 93 varies depending on the type and configuration of the inorganic compound used, but is generally within the range of 5 to 300 nm, and the value is appropriately selected. However, if the film thickness is less than 5 nm, a uniform film may not be obtained or the film thickness may not be sufficient, and the function as a gas barrier material may not be sufficiently achieved.

  On the other hand, when the film thickness exceeds 300 nm, flexibility cannot be maintained in the thin film, and the thin film may be cracked due to external factors such as bending and pulling after the film formation. The thickness of the deposited thin film layer 93 is preferably in the range of 10 to 150 nm.

  There are various methods for forming the vapor-deposited thin film layer 93 made of an inorganic oxide on the primer layer 92, which can be formed by a normal vacuum vapor deposition method, but other thin film forming methods such as sputtering and ion plating. Alternatively, plasma vapor deposition (CVD) or the like can be used. However, considering productivity, the vacuum deposition method is the best at present.

  As the heating means of the vacuum deposition apparatus by the vacuum deposition method, an electron beam heating method, a resistance heating method, and an induction heating method are preferable. In order to improve the adhesion between the thin film and the substrate and the denseness of the thin film, a plasma assist method or An ion beam assist method can also be used.

  In addition, in order to increase the transparency of the deposited film, it is possible to carry out reactive deposition by blowing oxygen gas or the like during deposition.

  Next, the gas barrier coating layer 94 is provided on the vapor-deposited thin film layer 93 made of an inorganic oxide in order to provide a gas barrier property as high as that of an aluminum foil depending on the required quality.

  The gas barrier coating layer 94 is mainly composed of an aqueous solution or a water / alcohol mixed solution containing at least one of a water-soluble polymer and (a) one or more metal alkoxides and hydrolysates or (b) tin chloride. It is formed using a coating agent.

  In addition, a solution in which a water-soluble polymer and tin chloride are dissolved in an aqueous (water or water / alcohol mixed) solvent, or a solution in which a metal alkoxide is directly or previously hydrolyzed is mixed. A vapor-deposited thin film layer 93 made of an inorganic oxide is coated, heated and dried. Each component contained in the coating agent will be described in more detail.

  Examples of the water-soluble polymer used in the coating agent in the present invention include polyvinyl alcohol, polyvinyl pyrrolidone, starch, methyl cellulose, carboxymethyl cellulose, sodium alginate and the like.

  In particular, when polyvinyl alcohol (hereinafter abbreviated as PVA) is used as the coating agent of the laminate of the present invention, the gas barrier property is most excellent. The PVA here is generally obtained by saponifying polyvinyl acetate, and includes from so-called partially saponified PVA in which several dozen percent of acetate groups remain to complete PVA in which only several percent of acetate groups remain. There is no particular limitation.

The tin chloride may be stannous chloride (SnCl ₂ ), stannic chloride (SnCl ₄ ), or a mixture thereof, and may be used as an anhydride or a hydrate.

Furthermore, the metal alkoxide is represented by a general formula M (OR) _n (M) such as tetraethoxysilane [Si (OC ₂ H ₅ ) ₄ ], triisopropoxy aluminum [Al (O-2′-C ₃ H ₇ ) ₃ ]. : Metal such as Si, Ti, Al, Zr, R: alkyl group such as CH ₃ and C ₂ H ₅ ). Among these, tetraethoxysilane and triisopropoxyaluminum are preferable because they are relatively stable in an aqueous solvent after hydrolysis.

  Each of the above components can be added to the coating agent alone or in combination, and further, an isocyanate compound, a silane coupling agent, or a dispersant, stabilizer, viscosity adjustment, as long as the gas barrier properties of the coating agent are not impaired. Known additives such as coloring agents and coloring agents can be added.

  For example, the isocyanate compound added to the coating agent has two or more isocyanate groups (NCO groups) in the molecule. For example, monomers such as tolylene diisocyanate, triphenylmethane triisocyanate, and tetramethylxylene diisocyanate. And their polymers and derivatives.

  As a method for applying the coating agent, conventionally known means such as a dipping method, a roll coating method, a screen printing method, a spray method and the like that are usually used can be used.

  The thickness of the coating film varies depending on the type of coating agent and the processing conditions, but the thickness after drying should be 0.01 μm or more, but if the thickness exceeds 50 μm, cracks are likely to occur in the film, The range of 0.01-50 micrometers is preferable.

  In addition, the intermediate layer 96 is provided to increase the bag breaking strength. Generally, from the viewpoint of mechanical strength and thermal stability, the intermediate layer 96 includes a biaxially stretched nylon film, a biaxially stretched polyethylene terephthalate film, and a biaxially stretched polypropylene film. Chosen from.

  And although thickness is decided according to a material, required quality, etc., generally it is the range of 10-30 micrometers. As a forming method, lamination can be performed by a known method such as a dry laminating method in which an adhesive such as a two-component curable urethane resin is used.

The heat seal layer 97 is provided as an adhesive layer when forming a packaging bag or the like as described above. Any resin having heat-fusibility can be used.

  For example, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-methacrylic acid copolymer, ethylene-methacrylic acid ester copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer and their Resins such as metal cross-linked products are used. Considering retort sterilization suitability in food packaging, polypropylene resin can be used more preferably.

  And although thickness is decided according to the objective, generally it is the range of 15-200 micrometers. Moreover, as a forming method, it is common to use a dry laminating method or the like in which a film-like material made of the above resin is bonded using an adhesive such as a two-component curable urethane resin. Can be stacked.

  When cooking the contents of the steam release packaging bag stored in the steam release packaging bag outer box of the present invention, the steam release packaging bag can be cooked while being stored in the steam release packaging bag outer box. And it is a wonderful invention that can be used not only in the outer packaging box for steam-developing packaging bags, but also in the medical / pharmaceutical fields, etc., in which the stored items do not scatter in the microwave oven.

It is a perspective view which shows the external shape of one Example of the form of the exterior box for steam-release packaging bags of this invention in which the steam-release packaging bag is accommodated. It is explanatory drawing for demonstrating at the time of microwave-heating the outer packaging box for steam-release packaging bags of FIG. It is a top view of the blank board which expand | deployed the steam-wrapping packaging bag exterior box of FIG. It is a perspective view which shows the external shape of other one Example of the form of the exterior box for steam-release packaging bags of this invention in which the steam-release packaging bag is accommodated. It is explanatory drawing for demonstrating at the time of microwave-heating the outer packaging box for steam-release packaging bags of FIG. It is a top view of the blank board which expand | deployed the outer packaging box for steam-release packaging bags of FIG. (A) is a top view which shows an example of the steam release packaging bag accommodated in the exterior box for steam release packaging bags of this invention. Further, (b) is a cross-sectional view showing a cross section along line AA ′ of (a). It is the enlarged view to which the B section of FIG.7 (b) was expanded. It is explanatory drawing for demonstrating the state at the time of filling the contents in the vapor-development packaging bag accommodated in the exterior box for vapor-development packaging bags of this invention, and heating a microwave oven. It is explanatory drawing which shows the cross section of the side surface of the steam release packaging bag accommodated in the outer packaging box for steam release packaging bags of this invention. It is explanatory drawing for demonstrating the material structure used for a steam release packaging bag. It is explanatory drawing for demonstrating the material structure used for a steam release packaging bag. It is the schematic for demonstrating the conventional packaging bag for microwave oven heating, a packaging box, and a heating method. It is the schematic for demonstrating the conventional packaging box for microwave oven heating, a heating method, etc. FIG. It is the schematic for demonstrating the conventional packaging box for microwave oven heating, a heating method, etc. FIG. It is the schematic for demonstrating the conventional packaging box for microwave oven heating, a heating method, etc. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Front plate 2 ... Bottom plate 3 ... Left side plate 4 ... Right side plate 5 ... Upper front plate 6 ... Lower front plate 7 ... Zipper 8 ... Zipper knob 9 ... Ruled line 10 ... Ruled line 11 ... Ruled line 12 ... Ruled line 13 ... Ruled line 13 14 ... Ruled Line 15 ... Ruled Line 16 ... Opening 17 ... Ruled Line 18 ... Ruled Line 19 ... Ruled Line 20 ... Ruled Line 21 ... Steam Hole Perimeter 22 ... Steam Hole 23 ... Ruled Line 24 ... Ruled Line 25 ... Ruled Line 26 ... Ruled Line 30 ... Blank Plate 40 ... Bottom Side left side plate 41 ... Upper left side plate 42 ... Lower side bottom plate 43 ... Upper side bottom plate 44 ... Adhesive side plate 50 ... Steam vent packaging bag 60 ... Steam vent packaging bag exterior box 70 ... Steam vent packaging bag 80 ... Steam vent packaging bag Exterior box 90 ... Blank board

Claims (3)

In a package composed of an outer box and a packaging bag stored in the outer box, the package that heats and cooks the contents of the packaging bag while storing the packaging bag in the outer box,
The packaging bag is flat, and the packaging bag is provided with vapor holes that are peeled open by an internal pressure of a gas such as water vapor generated by heating,
A part of the upper surface of the outer box is provided with a detachable opening that can form an opening,
The packaging bag is stored in the outer box so that the steam hole faces the upper surface in a flat posture .
The opening is arranged so as to avoid the position facing the vapor hole, the upper surface of the vapor hole is covered with the inner surface of the outer packaging box, and the outer packaging box is used to swell the packaging bag upon heating. A packaging body provided with ruled lines that swell the outer box into a cylindrical shape in synchronization . The packaging body according to claim 1, wherein the separating and opening portion is provided in a strip shape in a width direction substantially at the center of the upper surface of the outer package box for a steam release packaging bag covering the steam hole. The packaging body according to claim 1, wherein the separating and opening portion is provided in a state in which the window is convex upward in the upper direction of the upper surface of the outer packaging box for the steam vent packaging bag covering the steam hole. .

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