JP2019131253A - Delamination container - Google Patents

Abstract

To provide a delamination container capable of sufficiently reducing peel resistance to a trunk of a storage part, and easy to manufacture.SOLUTION: A synthetic resin delamination container 1 formed by blow-molding a preform assembly in which an inner preform is assembled into the inside of an outer preform comprises: an external layer body 10 having a cylindrical outer mouth part 11 and a bottomed cylindrical trunk 12 continuing to the outer mouth part 11; an internal layer body 20 having a cylindrical inner mouth part arranged inside the outer mouth part 11, and a freely volume-reduced and deformable storage part 22 peelably laminated on the inner surface of the trunk 12; and a fresh air introducing port 13 for introducing fresh air to between the external layer body 10 and the internal layer body 20. A vapor deposition film is provided at least on any one of the inner surface of the trunk 12 and the outer surface of the storage part 22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a synthetic resin laminated release container formed by blow molding a preform assembly in which an inner preform is incorporated inside an outer preform.

  By blow-molding a preform assembly that incorporates the inner preform inside the outer preform as a container for storing food seasonings such as soy sauce, beverages, cosmetics, shampoo, rinse, liquid soap, etc. An outer layer body having a cylindrical outer mouth portion and a bottomed cylindrical trunk portion connected to the outer mouth portion, and a cylindrical inner mouth portion disposed inside the outer mouth portion and the inner surface of the trunk portion are peeled off 2. Description of the Related Art A synthetic resin delamination container (delamination container) formed in a double structure having an inner layer body including a volume-reducing and deformable accommodating portion laminated in a possible manner is known.

  Such a delamination container is used, for example, as a squeeze-type pour-out container combined with a pour-out cap equipped with a check valve, or as a container with a pump combined with a pump, and squeezes the trunk of the outer layer body. The content liquid can be poured out by (squeezing) or operating the pump. On the other hand, after the content liquid is poured out, the outer layer body is restored or maintained in its original shape by introducing outside air between the outer layer body and the inner layer body from the outside air inlet provided in the outer layer body. Only the housing portion can be reduced in volume. Therefore, according to the delamination container, the content liquid stored in the inner layer body container is discharged outside without replacing it with the outside air, and the outside air is discharged into the content liquid stored inside the inner layer body. The contact can be reduced, and the content liquid can be prevented from being deteriorated or altered.

  However, since the conventional delamination container is formed by blow molding a preform assembly in which the inner preform is incorporated inside the outer preform, the inner layer is formed by high pressure and heat during blow molding. There is a risk that the outer surface of the body housing portion is in close contact with the inner surface of the body portion of the outer layer body, which increases the peeling resistance to the body portion of the housing portion and causes the housing portion to fail to peel when the content liquid is poured out. There was a problem that there was.

  For such problems, for example, as described in Patent Document 1, a delamination release container in which a release agent layer containing liquid paraffin is provided between an outer surface of a housing portion and an inner surface of a trunk portion has been proposed. Yes.

JP 2017-186059 A

  However, even if the release agent layer containing liquid paraffin is provided between the outer surface of the housing part and the inner surface of the body part as in the delamination container described in Patent Document 1, The peel resistance could not be reduced sufficiently, and further improvements for solving the above-described problems have been demanded.

  In the conventional delamination container, the inner surface of the outer preform or the inner preform is formed so that a release agent layer containing liquid paraffin is provided between the outer surface of the housing portion and the inner surface of the trunk portion. After applying a release agent containing liquid paraffin on the outer surface, it is necessary to incorporate the inner preform inside the outer preform. However, the release agent containing liquid paraffin has fluidity and is applied to the inner surface of the outer preform or the outer surface of the inner preform in a wet state. When the preform is incorporated, there is a possibility that the release agent may sag or uneven in thickness, and there is a problem that handling of the outer preform or the inner preform becomes complicated.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a delamination container that can sufficiently reduce the peel resistance of the housing portion with respect to the body portion and can be easily manufactured. There is.

  A delamination container of the present invention is a synthetic resin delamination container formed by blow molding a preform assembly in which an inner preform is incorporated inside an outer preform, and has a cylindrical outer mouth portion and An outer layer body including a bottomed cylindrical body portion connected to the outer mouth portion, a cylindrical inner mouth portion disposed inside the outer mouth portion, and an inner surface of the body portion are detachably stacked. An inner layer body having a volume-reducing and deformable accommodating portion, and an outside air introduction port for introducing outside air between the outer layer body and the inner layer body, and the inner surface of the trunk portion or the accommodating portion A vapor deposition film is provided on at least one of the outer surfaces.

  In the delamination container according to the present invention, in the above-described configuration, the vapor deposition film is preferably provided dispersed in a number of vapor deposition film pieces.

  In the laminated peeling container of the present invention, the outer layer body and the inner layer body are preferably formed of a polyethylene terephthalate resin in the above-described configuration.

  In the laminated peeling container of the present invention, in the above structure, the vapor deposition film is preferably formed of silicon oxide.

  The laminate peeling container according to the present invention has an adhesive film formed of an organosilicon compound between the inner surface of the barrel portion or the outer surface of the housing portion on which the vapor deposition film is provided and the vapor deposition film in the above configuration. It is preferred that

  In the above configuration, the delamination container according to the present invention is preferably provided with the vapor deposition film only on the inner surface of the body portion.

  In the delamination container according to the present invention, in the above configuration, the thickness of the vapor deposition film is preferably 100 nm or more and 300 nm or less.

  ADVANTAGE OF THE INVENTION According to this invention, the peeling resistance with respect to the trunk | drum of an accommodating part can fully be reduced, and the lamination peeling container which can be manufactured easily can be provided.

It is a side view which cuts out one part and shows the lamination peeling container which is one embodiment of this invention. It is a top view of the lamination peeling container shown in FIG. It is sectional drawing of the part of the outer opening part and inner opening part of the lamination peeling container shown in FIG. It is an enlarged view which expands and shows a part of inner surface of the trunk | drum shown in FIG. It is sectional drawing which follows the AA line in FIG. FIG. 2 is a side view showing a preform assembly for forming the delamination container shown in FIG. 1 with a part thereof cut away. FIG. 7 is a side view showing the outer preform shown in FIG. 6 with a part thereof cut away.

  Hereinafter, the present invention will be described more specifically with reference to the drawings.

  A delamination container 1 according to an embodiment of the present invention shown in FIG. 1 is made of a synthetic resin, also called a delamination container (delamination container), and has a double structure having an outer layer body 10 and an inner layer body 20. It has become. Below, the case where the lamination peeling container 1 shall be used as a squeeze-type extraction container which accommodates food seasonings, such as soy sauce, as a content liquid is demonstrated.

  In the present specification, claims and drawings, the vertical direction means the vertical direction in the state where the delamination container 1 is in the upright posture as shown in FIG. 1, and the radial direction is the stacking direction. It means a direction along a straight line that passes through the axis O of the peeling container 1 and is perpendicular to the axis O.

  The outer layer body 10 is a part constituting the outer shell of the delamination container 1 and has a bottle shape including an outer mouth part 11 and a bottomed cylindrical body part 12 integrally connected to the lower end of the outer mouth part 11. ing.

  As shown in FIGS. 1 and 2, the outer opening 11 has a cylindrical shape, and a male screw 11 a is integrally provided on the outer peripheral surface thereof. The outer mouth portion 11 can be fitted with a pouring cap (not shown) provided with a spout by being screw-coupled to the male screw 11a.

  In addition, the outer port part 11 can also be set as the structure which replaces with the external thread 11a, and is equipped with an annular protrusion, and a pouring cap engages | wears with the said protrusion by an undercut shape by a stopper. In this case, the outer opening 11 is not limited to a cylindrical shape, and may be, for example, a rectangular tube shape or an elliptical tube shape as long as it is a cylinder shape.

  The outer opening portion 11 is provided with a pair of outside air introduction ports 13. The pair of outside air introduction ports 13 are elongated through holes that extend in the circumferential direction and extend through the outer port portion 11 in the radial direction, and are symmetrical to each other on both sides of the axis O of the outer port portion 11. Is arranged. The pair of outside air introduction ports 13 communicate with each other between the outer layer body 10 and the inner layer body 20, and outside air can be introduced between the outer layer body 10 and the inner layer body 20 through these outside air introduction ports 13. .

  A neck ring 14 is integrally provided below the outside air introduction port 13 of the outside port 11. The neck ring 14 extends in an annular shape over the entire circumference of the outer opening portion 11, and protrudes from the outer peripheral surface of the outer opening portion 11 toward the radially outer side.

  The trunk | drum 12 has the shoulder part 12a, the trunk | drum main-body part 12b, and the bottom part 12c.

  The shoulder portion 12 a is integrally connected to the lower end of the outer opening portion 11, gradually increases in diameter toward the lower side, and projects outward in the radial direction with respect to the outer opening portion 11. The trunk body portion 12b is formed in a cylindrical shape having a substantially circular cross section having a constricted portion, and is integrally connected to the lower end of the shoulder portion 12a at the upper end thereof. The bottom 12c is integrally connected to the lower end of the trunk body 12b and closes the lower end of the trunk body 12b. The bottom portion 12c has a shape in which the inside of the annular outer peripheral edge is recessed, and the delamination container 1 can be arranged in an upright posture by grounding the bottom portion 12c.

  The trunk body 12b has flexibility, and can be elastically deformed and dented radially inward by being squeezed (squeezed), and from its depressed state to its original shape. It can be restored on its own. By adopting a configuration in which the trunk body 12b can be elastically deformed by squeezing, when the delamination container 1 is used as a squeeze-type dispensing container, the content liquid can be easily dispensed. At the same time, the body main body 12b is easily restored to its original shape after the content liquid is poured out, so that the outside air is reliably introduced through the outside air inlet 13 between the outer layer body 10 and the inner layer body 20. And the function as the lamination peeling container 1 can be exhibited reliably.

  A plurality (18) of concave ribs 15 extending in the vertical direction are arranged on the shoulder portion 12a at regular intervals over the entire circumference in the circumferential direction. In FIGS. 1 and 2, for convenience, only one concave rib 15 is denoted by a reference numeral. By providing the plurality of concave ribs 15 on the shoulder 12a, the inner layer body 20 can be easily peeled from the outer layer body 10 at the shoulder 12a. In addition, it can also be set as the structure which does not provide the concave rib 15. FIG.

  The inner layer body 20 has an inner port portion 21 and a housing portion 22.

  As shown in FIG. 3, the inner opening 21 has a cylindrical shape with a smaller diameter than the outer opening 11, and is arranged on the inner side of the outer opening 11 and coaxially with the outer opening 11. A gap 23 having a predetermined interval is provided between the inner peripheral surface of the outer port portion 11 and the outer peripheral surface of the inner port portion 21. An enlarged diameter portion 24 is integrally provided at the upper end of the inner mouth portion 21, and the outer peripheral surface of the enlarged diameter portion 24 abuts the inner circumference surface of the outer mouth portion 11 over the entire circumference, thereby A gap 23 between the mouth part 11 and the inner mouth part 21 is closed to the outside at the upper end part of the outer mouth part 11 or the inner mouth part 21. A flange portion 25 that extends radially outward is integrally provided at the upper end of the enlarged diameter portion 24, and the inner mouth portion 21 is in contact with the outer mouth portion 11 by the flange portion 25 coming into contact with the upper end of the outer mouth portion 11. Are positioned in the axial direction.

  The inner port portion 21 is not limited to a cylindrical shape, and may be a cylindrical shape. For example, when the outer port portion 11 is formed in a rectangular tube shape or an elliptical tube shape, similarly, a rectangular tube shape or an elliptical shape is used. It can be formed in a cylindrical shape.

  As shown in FIG. 1, the accommodating portion 22 is formed in a bag shape thinner than the trunk portion 12, and is integrally connected to the lower end of the inner mouth portion 21 and is peelably laminated on the inner surface of the trunk portion 12. The interior of the storage portion 22 is a storage space S for content liquid. The content liquid can be filled in the storage portion 22 through the inner port portion 21 and is stored in the storage portion 22 through the inner port portion 21. Can be poured out to the outside. Accommodating portion 22 can be reduced in volume (deformed so as to reduce the internal volume) while being peeled off from the inner surface of body 12 as the content liquid is poured out. With the volume reduction deformation of the housing part 22, outside air is introduced between the outer layer body 10 and the inner layer body 20 from the outside air introduction port 13, so that the trunk body part 12 b is maintained or restored to the original shape, Only the housing portion 22 can be easily peeled off from the inner surface of the body portion 12 and can be deformed and reduced in volume.

  As shown in FIG. 3, vertical ribs 26 are integrally provided on the outer surface of the inner layer body 20 in order to secure an air passage for the outside air from the outside air inlet 13 to the body portion 12 and the accommodating portion 22. ing. Although not shown in detail, in the delamination container 1 of the present embodiment, three vertical ribs 26 are provided on the outer surface of the inner layer body 20 in a predetermined range in the circumferential direction around the one outside air inlet 13. In addition to being provided side by side in the direction, three vertical ribs 26 are provided side by side in a predetermined range in the circumferential direction centered on the other outside air inlet 13. At least one of these vertical ribs 26 faces each outside air introduction port 13. Each of the vertical ribs 26 protrudes radially outward from the outer surface of the inner layer body 20 and extends in a direction along the axis O from the inner port portion 21 to the accommodating portion 22, and the outer layer body 10 and the inner layer body 20. In the meantime, an air passage for outside air that reaches from the outside air inlet 13 to the portion between the shoulder portion 12a and the accommodating portion 22 beyond the neck ring 14 is formed. Thereby, the air passage of the outside air introduced from the outside air introduction port 13 can be surely introduced between the shoulder portion 12 a and the accommodating portion 22.

  The vertical ribs 26 may be provided on the inner peripheral surface of the outer opening portion 11. Furthermore, it is also possible to adopt a configuration in which the vertical ribs 26 are not provided in any of the outer opening portion 11 and the inner opening portion 21.

  Both the outer layer body 10 and the inner layer body 20 are made of polyethylene terephthalate resin (PET). By making each of the outer layer body 10 and the inner layer body 20 made of polyethylene terephthalate resin, the delamination container 1 can be made lightweight and highly transparent.

  FIG. 4 is an enlarged view showing a part of the inner surface of the body 12 shown in FIG. As shown in FIG. 4, in order to reduce the peeling resistance with respect to the body part 12 of the accommodating part 22, the inner surface of the body part 12 of the outer layer body 10 has a large number of vapor deposition film pieces as a vapor deposition film over the entire surface. 30 are provided in a distributed manner. For convenience, in FIG. 4, only some of the vapor deposition film pieces 30 are denoted by reference numerals.

These vapor-deposited film pieces 30 are thin film pieces formed by finely dividing the vapor-deposited film on the inner surface of the body portion 12, and the inner surface of the body portion 12 is spaced apart from each other in the vertical direction and the circumferential direction. It is fixed to. In this embodiment, each of the deposited film pieces 30, thickness has a substantially rectangular shape of the film pieces of about 100 nm, The area of each deposited film pieces 30, 30μm ² ~100μm ² range of about There are variations.

  In addition, the area, thickness, and shape of the vapor deposition film piece 30 are not restricted above, Various area, thickness, and shape may be sufficient. Moreover, in the many vapor deposition film pieces 30, what the adjacent vapor deposition film pieces 30 contact mutually may be contained.

  The surface of the inner layer body 20 of the large number of vapor deposition film pieces 30 facing the housing portion 22 side is slidably in contact with the housing portion 22 without being fixed to the housing portion 22. That is, the accommodating part 22 is laminated | stacked on the inner surface of the trunk | drum 12 through many vapor deposition film pieces 30 so that peeling is possible.

  In the present embodiment, a large number of vapor-deposited film pieces 30 are each formed of silicon oxide (silica: SiOx). Further, as shown in FIG. 5, an adhesive film piece 31 as an adhesive film formed of an organosilicon compound is provided between the vapor deposition film piece 30 formed of silicon oxide and the inner surface of the body portion 12. ing. By providing the adhesive film piece 31 between the vapor deposition film piece 30 and the inner surface of the body portion 12, the vapor deposition film piece 30 can be firmly fixed to the inner surface of the body portion 12. Note that the vapor deposition film piece 30 may be directly fixed to the inner surface of the body portion 12 without providing the adhesive film piece 31.

  The delamination container 1 having the above-described configuration can be formed by blow-molding a synthetic resin preform assembly 40 shown in FIG. This preform assembly 40 has a double structure in which an inner preform 60 made of a synthetic resin for forming the inner layer body 20 is incorporated inside an outer preform 50 made of a synthetic resin for forming the outer layer body 10. It has become.

  The outer preform 50 is formed in a predetermined shape corresponding to the outer layer body 10 by injection-molding the same synthetic resin material as that of the outer layer body 10 using a mold. In the present embodiment, the outer preform 50 is made of polyethylene terephthalate resin like the outer layer body 10.

  The outer preform 50 has an outer opening 51 having the same shape as the outer opening 11 of the outer layer body 10. That is, the outer opening 51 has a cylindrical shape, and a male screw 51 a is integrally provided on the outer peripheral surface thereof, and a pair of outside air introduction ports 52 that respectively penetrate the outer opening 51 in the radial direction are axial centers of the outer opening 51. It is provided symmetrically with each other on both sides. In addition, a substantially test tube extending portion 53 having a hemispherical bottom is integrally provided at the lower end of the outer opening 51. The extending portion 53 is thicker than the outer opening 51. A flange-shaped neck ring 54 is integrally provided between the outer opening portion 51 and the extending portion 53.

  The inner preform 60 is formed in a predetermined shape corresponding to the inner layer body 20 by injection-molding the same synthetic resin material as that of the inner layer body 20 using a mold. In the present embodiment, the inner preform 60 is made of polyethylene terephthalate resin like the inner layer body 20.

  The inner preform 60 has an inner mouth portion 61 having the same shape as the inner mouth portion 21 of the inner layer body 20. That is, the inner opening 61 has a cylindrical shape with a smaller diameter than the outer opening 51, and is disposed on the inner side of the outer opening 51 and coaxially with the outer opening 51. An enlarged diameter portion 62 is integrally provided at the upper end of the inner opening portion 61, and the outer peripheral portion of the enlarged diameter portion 62 is in contact with the inner peripheral surface of the outer opening portion 51 over the entire circumference. The upper end portion of the gap between the inner opening 61 and the inner opening 61 is closed to the outside. A flange portion 63 that extends radially outward is integrally provided at the upper end of the enlarged diameter portion 62, and the inner mouth portion 61 is in contact with the outer mouth portion 51 by the flange portion 63 coming into contact with the upper end of the outer mouth portion 51. Are positioned in the axial direction. At the lower end of the inner opening 61, a substantially test tube extending portion 64 having a hemispherical bottom is integrally provided. The outer diameter of the extending portion 64 is smaller than the outer diameter of the inner opening 61. A gap is provided between the outer peripheral surface of the extending portion 64 and the inner peripheral surface of the extending portion 53, and when the inner preform 60 is incorporated into the outer preform 50, the outer peripheral surface of the extending portion 64 and the extending portion 53 are provided. The inner peripheral surface of the is not damaged. Although not shown in detail, on the outer surface of the inner preform 60, three vertical ribs are provided in a predetermined range in the circumferential direction centered on one of the outside air introduction ports 52, and are arranged side by side in the circumferential direction. Three vertical ribs are provided in a predetermined range in the circumferential direction centered on the other outside air introduction port 52 and arranged at intervals in the circumferential direction. The shape of each vertical rib is the same as that of the vertical rib 26 provided on the outer peripheral surface of the inner opening 21.

  As shown in FIG. 7, a vapor deposition film 55 is provided on the inner surface of the outer preform 50. The vapor deposition film 55 forms the vapor deposition film piece 30 by finely cracking. Although not shown in detail, an adhesive film corresponding to the adhesive film piece 31 is provided between the inner surface of the outer preform 50 and the vapor deposition film 55.

The vapor deposition film 55 and the adhesive film are deposited on the inner surface of the outer preform 50 by chemical vapor deposition (CVD) using a mixed gas in which hexamethyldisiloxane (HMDSO) and oxygen (O ₂ ) are mixed. It is formed.

  More specifically, first, the outer preform 50 is set inside the outer electrode, and the inner electrode is inserted into the outer preform 50 from the outer opening 51. Next, after reducing the pressure inside the electrode and maintaining a predetermined pressure, a mixed gas obtained by mixing hexamethyldisiloxane and oxygen is supplied into the outer preform 50 at a predetermined flow rate. Next, a high frequency of 13.56 MHz is applied between the external electrode and the internal electrode under predetermined power output conditions, and plasma is generated between the external electrode and the internal electrode to be introduced into the outer preform 50. The mixed gas is decomposed and deposited on the inner surface of the outer preform 50. Thereby, an adhesive film made of an organosilicon compound is formed on the inner surface of the outer preform 50. Next, the adhesion formed on the inner surface of the outer preform 50 by changing the power output conditions of the outer electrode and the inner electrode and changing the flow rate of hexamethyldisiloxane and oxygen and performing vapor deposition in the same manner as described above. A vapor deposition film 55 made of silicon oxide is formed on the surface of the film so as to overlap the adhesive layer.

  In the chemical vapor deposition method, application of a high frequency between the external electrode and the internal electrode can be performed by pulse discharge that is turned on / off at a predetermined duty ratio. In this case, the duty ratio of the pulse discharge is preferably set to an arbitrary value such that the outer preform 50 is not excessively heated and contracts.

  Further, in the illustrated case, the vapor deposition film 55 is formed on the entire inner surface of the outer preform 50. However, the present invention is not limited to this, and by performing masking or the like during vapor deposition, the inner surface of the outer preform 50 is formed. Of these, the vapor deposition film 55 may be formed only on the inner surface of the extending portion 53 corresponding to the inner surface of the body portion 12 after blow molding. In this case, the vapor deposition film 55 may be formed only on the portion corresponding to the trunk main body portion 12b of the extending portion 53, and the vapor deposition film 55 may not be provided on the hemispherical portion corresponding to the bottom portion 12c.

  By performing blow molding of the preform assembly 40 having such a configuration, the delamination container 1 shown in FIG. 1 can be manufactured. In the present embodiment, biaxial stretch blow molding is employed as blow molding.

  More specifically, the biaxially stretched blow molding of the preform assembly 40 is performed by using a blow molding die (not shown) constituting a blow molding device, in which the outer mouth portion 51 and the inner mouth portion 61 are made of a die. The preform assembly 40 is set so that the neck ring 54 protrudes from the cavity and the neck ring 54 is supported on the upper surface of the mold so that the extending portions 53 and 64 are located inside the cavity. In this state, the extending portions 53 and 64 are While a stretching rod is stretched in the axial direction, a pressurized medium such as pressurized air or pressurized liquid is supplied to the inside of the preform assembly 40 through the inner opening 61, and the stretching portions 53 and 64 extend along the inner surface of the cavity. Blow molding into shape. In this way, the preform assembly 40 in which the inner preform 60 formed by injection molding is incorporated inside the outer preform 50 formed by injection molding is biaxially stretch blow molded, whereby the laminate having the above-described configuration is formed. The peeling container 1 can be manufactured easily.

  Here, in blow molding, the stretched portion 53 of the outer preform 50 is stretched in the vertical direction (the direction of the axis O) and in the radial direction, but the vapor deposition film 55 formed on the inner surface of the outer preform 50 and adhesion Since the film is poor in stretchability, the film is not stretched together with the stretched portion 53, but is subjected to a tensile load in the vertical direction and the circumferential direction by the stretching, and is finely divided in the vertical direction and the circumferential direction. The vapor deposition film 55 and the adhesive film are finely divided in the vertical direction and the circumferential direction in this way, so that a large number of vapor deposition film pieces 30 or adhesive film pieces 31 are formed on the inner surface of the body portion 12 formed by blow molding. Will be.

  Further, since the vapor deposition film 55 is formed in a dry state on the inner surface of the outer preform 50, when the inner preform 60 is incorporated inside the outer preform 50, dripping or unevenness in thickness occurs in the vapor deposition film 55. The outer preform 50 or the inner preform 60 is easy to handle.

  Thus, by performing blow molding of the preform assembly 40 using the outer preform 50 having the vapor deposition film 55 formed on the inner surface, a large number of vapor deposition film pieces 30 are provided on the inner surface of the body portion 12. In addition, the delamination container 1 having the above configuration can be manufactured easily and at low cost.

  The delamination container 1 of the present embodiment having such a configuration can be configured as a squeeze container by attaching a pouring cap to the outer opening portion 11. In this case, as the pouring cap, for example, an outside air check valve that allows outside air to be introduced into the outside air introduction port 13 and prevents outflow of outside air from the outside air introduction port 13 to the outside, and an inside port portion 21 are used. It is possible to use a configuration including a content liquid check valve that allows the content liquid to be discharged to the outside and prevents backflow of outside air into the storage portion 22.

  In the delamination container 1 configured as a squeeze container, when the trunk main body 12b of the outer layer body 10 is squeezed (squeezed), the container 22 is deformed and deformed, and the content liquid is pushed out from the dispensing cap to the outside. Be poured out. When the squeeze of the body main body 12b is released after the content liquid is poured out, the body main body 12b attempts to restore the original shape. At this time, the outer layer body 10 and the inner layer body are introduced from the outside air introduction port 13. 20, while the outside air is being introduced, the housing portion 22 of the inner layer body 20 is peeled from the inner surface of the body portion 12, so that only the body main body portion 12 b is restored to its original shape while the housing portion 22 is deformed and deformed. . Thereby, the content liquid accommodated in the accommodating part 22 is poured out without replacing it with the outside air, the contact of the external air with the content liquid accommodated in the accommodating part 22 is reduced, and the deterioration and alteration are suppressed. it can.

  Here, in the delamination container 1 according to the present embodiment, since a large number of vapor deposition film pieces 30 are dispersed and provided on the inner surface of the body 12 of the outer layer body 10, the separation of the container 22 from the body 12 is performed. The resistance can be sufficiently reduced to such an extent that the accommodating portion 22 does not cause a peeling failure. Thus, when the content liquid is poured out, the accommodating portion 22 can be surely separated from the body portion 12, thereby preventing the separation failure of the accommodating portion 22. Moreover, since the accommodating part 22 can be reliably peeled from the trunk | drum 12 at the time of the content liquid extraction as above-mentioned, the trunk | drum 12 squeezed for the content liquid extraction is the original shape. Can be restored quickly. Therefore, it is possible to make the delamination container 1 exhibit its functions with certainty and make the delamination container 1 more convenient to use.

  Furthermore, the peeling resistance with respect to the trunk | drum 12 of the accommodating part 22 reduces, After forming the lamination peeling container 1 by blow molding, the work of the initial peeling which peels the accommodating part 22 from the inner surface of the trunk | drum 12 in advance is performed. Even if the content liquid is filled into the storage space S of the delamination container 1, the container 22 can be reliably peeled from the inner surface of the body 12 when the content liquid is poured out. Thereby, the work of initial peeling after blow molding becomes unnecessary, and the manufacturing cost of this lamination exfoliation container 1 can be reduced.

  Moreover, in the lamination peeling container 1 of this Embodiment, since many vapor deposition film pieces 30 were what was formed with the silicon oxide, the peeling resistance with respect to the outer surface of the accommodating part 22 was reduced more, and the said effect was ensured more. Can get to. In particular, by forming a large number of vapor-deposited film pieces 30 from silicon oxide, even when the outer layer body 10 and the inner layer body 20 are both made of polyethylene terephthalate resin, the housing portion 22 of the inner layer body 20 is formed as the outer layer body. The above-described effects can be obtained with certainty by ensuring that the 10 body portions 12 are peeled off.

  Furthermore, in the delamination container 1 according to the present embodiment, since a large number of vapor deposition film pieces 30 are provided only on the inner surface of the body 12 of the outer layer body 10, the volume is reduced as the content liquid is poured out. The above-described effect is ensured by reliably peeling the housing portion 22 of the inner layer body 20 from the body portion 12 of the outer layer body 10 while keeping the housing portion 22 to be deformed flexible so that the vapor deposition film piece 30 is not provided. Can get to.

  Furthermore, in the delamination container 1 according to the present embodiment, as shown in FIG. 5, an organic silicon compound is formed between a large number of vapor deposition film pieces 30 each formed of silicon oxide and the inner surface of the body portion 12. Since the adhesive film piece 31 is provided, a large number of vapor-deposited film pieces 30 can be reliably fixed to the inner surface of the body portion 12. Therefore, it is possible to prevent the vapor deposition film piece 30 from being peeled off from the inner surface of the body 12 due to a load, vibration, or the like when the body 12 is squeezed.

  Here, in the lamination peeling container 1 of this Embodiment, it is preferable that the thickness of many vapor deposition film pieces 30 shall be 100 nm or more and 300 nm or less.

  That is, in the case where both the outer layer body and the inner layer body are made of polyethylene terephthalate resin as in the conventional delamination container, the peeling resistance to the barrel portion of the housing portion is higher, so that When the outer surface of the housing portion is rubbed against the inner surface of the trunk portion when the portion is squeezed, there is a problem that stagnation occurs between them and the tactile sensation of the trunk portion becomes uncomfortable. become. In this respect, in the delamination container 1 configured as described above, since a large number of vapor-deposited film pieces 30 are provided dispersedly on the inner surface of the trunk portion 12, there is a gap between the inner surface of the trunk portion 12 and the outer surface of the accommodating portion 22. If there is a region where the vapor deposition film piece 30 is not provided, and the thickness of the vapor deposition film piece 30 is too small with respect to the area of the region, the container portion 22 is obtained when the body portion 12 is squeezed to pour out the content liquid. There is a possibility that the outer surface of the film contacts with the inner surface of the vapor deposition film piece 30 and rubs against each other, causing stagnation between them.

  In order to solve such a problem, the body 12 is squeezed in order to pour out the content liquid by setting the thickness of the large number of vapor deposition film pieces 30 to 100 nm or more and 300 nm or less in the delamination container 1 configured as described above. The outer surface of the housing portion 22 is prevented from contacting the inner surface of the vapor deposition film piece 30 in a region where the vapor deposition film piece 30 between the inner surface of the body portion 12 and the outer surface of the housing portion 22 is not provided, It is possible to reliably prevent stagnation between them.

  In order to confirm the above effect, each of the layers had the configuration of the above-described delamination container 1, and the delamination container and the adhesive film layer of Example 1 in which the thickness of the vapor deposition film piece including the adhesive film layer was 50 nm were included. A delamination container of Example 3 in which the thickness of the vapor deposition film piece was 100 nm and a delamination film container of Example 2 in which the thickness of the vapor deposition film piece including the adhesive film layer was 300 nm were prepared.

  Here, as described above, the vapor deposition film piece and the adhesive film piece provided on the inner surface of the barrel portion are formed on the inner surface of the barrel portion by vapor deposition using a chemical vapor deposition method. The film forming conditions for forming the film are as shown in Table 1.

  About the lamination peeling container of these Examples 1-3, the test which determines the quality of the tactile sense of the said trunk | drum when the trunk | drum was squeezed was done. Here, when a squeeze (stagnation sound) occurs between the inner surface of the body part and the outer surface of the housing part when the body part is squeezed, it is evaluated as x (defect), and even if the body part is squeezed, the body part In the case where no stagnation occurs between the inner surface of the container and the outer surface of the housing portion, the evaluation was good (good). In addition, in the delamination container of the above-described three Examples 1 to 3, five vapor depositions selected as samples based on an image obtained by observing the inner surface of the body portion at a predetermined portion with a microscope. While measuring the area of each film piece, the average value of the area of five vapor-deposited film pieces was calculated. The test results are shown in Table 2.

  As can be seen from Table 2, the lamination peeling container of Example 2 in which the thickness of the vapor deposition film piece including the adhesive film layer was 100 nm and the lamination of Example 3 in which the thickness of the vapor deposition film piece including the adhesive film layer was 300 nm. In the peeling container, no stagnation occurred even if the body part was squeezed, and the judgment of the tactile sensation was ○ (good). On the other hand, in the delamination container of Example 1 in which the thickness of the vapor deposition film piece including the adhesive film layer was 50 nm, squeezing occurred when the body portion was squeezed, and the tactile sensation was evaluated as x (defective).

  Also, from Table 2, the area of the vapor deposition film piece increases as the thickness of the vapor deposition film piece including the adhesive film layer increases, that is, only the area of the vapor deposition film piece with the thickness kept constant. It turned out to be difficult to increase or decrease.

  From the above results, it was found that if the thickness of the vapor deposition film piece including the adhesive film layer is set to 100 nm or more and 300 nm or less, it is possible to prevent stagnation when the body portion is squeezed.

  In addition, when it is set as the structure which does not provide an adhesive film layer, if the thickness of a vapor deposition film piece shall be 100 nm or more and 300 nm or less, the squeeze when a trunk | drum is squeezed can be prevented.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, in the above-described embodiment, the vapor deposition film is provided dispersed in a large number of vapor deposition film pieces 30. However, the present invention is not limited to this, and the inner surface of the body portion 12 is not dispersed in the large number of vapor deposition film pieces 30. It may be provided as one layer covering the whole. In this case, the adhesive film can also be provided as a single layer between the vapor deposition film and the inner surface of the body portion 12 without being dispersed in the adhesive film pieces 31 corresponding to the many vapor deposition film pieces 30. .

  Further, in the above-described embodiment, a large number of vapor deposition film pieces 30 are provided only on the inner surface of the outer layer body 10, but not limited to this, a large number of vapor deposition film pieces 30 are provided only on the outer surface of the inner layer body 20. Alternatively, a large number of vapor deposition film pieces 30 may be provided on both the inner surface of the outer layer body 10 and the outer surface of the inner layer body 20.

  Furthermore, in the said embodiment, although many vapor deposition film pieces 30 shall be formed with the silicon oxide, it is not restricted to this, It was formed by vapor deposition on the inner surface of the outer layer body 10 or the outer surface of the inner layer body 20. For example, it may be made of other materials such as DLC (diamond-like carbon).

  Furthermore, the thickness of many vapor deposition film pieces 30 is not restricted to the said numerical range, but can be variously changed.

  Furthermore, in the embodiment, the pair of outside air introduction ports 13 are provided in the outside port portion 11, but it is sufficient that at least one outside air introduction port 13 is provided.

  Furthermore, the outside air inlet 13 is a through hole provided in the outer mouth portion 11 and penetrating the outer mouth portion 11. However, the present invention is not limited to this, and for example, the upper end of the outer mouth portion 11 and the inner mouth portion 21. You may comprise as a clearance gap provided between upper ends and opening outside. Alternatively, the outside air inlet 13 may be provided in the shoulder 12a, the trunk main body 12b, or the bottom 12c.

  Further, the material of the outer layer body 10 is not limited to polyethylene terephthalate resin, and for example, polyester resin, polyolefin resin, nylon resin, polycarbonate resin (PC resin), cycloolefin copolymer resin (COC resin), cycloolefin polymer resin (COP resin). Other synthetic resin materials such as) can also be employed.

  Further, the material of the inner layer body 20 is not limited to polyethylene terephthalate resin, and for example, polyester resin, polyolefin resin, nylon resin, polycarbonate resin (PC resin), cycloolefin copolymer resin (COC resin), cycloolefin polymer resin (COP resin). ), Other synthetic resin materials such as ethylene-vinyl alcohol copolymer resin (EVOH resin) can also be employed. When an ethylene-vinyl alcohol copolymer resin is used as the material of the inner layer body 20, an appropriate ethylene content can be employed in consideration of barrier properties and flexibility. Further, the inner layer body 20 may have a multilayer structure in which a barrier layer such as an MX nylon resin layer is provided between a pair of polyethylene terephthalate resin layers in order to ensure barrier properties.

  Further, the outer opening portion 11 may be configured not to include the neck ring 14, and the shapes of the shoulder portion 12a, the trunk main body portion 12b, and the bottom portion 12c can be variously changed.

  Furthermore, in the said embodiment, the squeeze type injection | pouring which pours the content liquid by attaching the extraction | pouring cap provided with the spout to the outer opening part 11 and squeezing the trunk | drum 12 is carried out. Although the case where it was assumed to be used for a discharge container has been shown, the trunk portion 12 has a predetermined rigidity that does not easily squeeze and is used for a pump-equipped container in which a pump type pouring tool is attached to the outer opening portion 11 It can also be.

DESCRIPTION OF SYMBOLS 1 Lamination peeling container 10 Outer layer body 11 Outer port part 11a Male thread 12 Trunk part 12a Shoulder part 12b Trunk body part 12c Bottom part 13 Outside air introduction port 14 Neck ring 15 Concave rib 20 Inner layer body 21 Inner mouth part 22 Storage part 23 Gap 24 Expansion of diameter Part 25 Flange part 26 Vertical rib 30 Deposition film piece (deposition film)
31 Adhesive film piece (adhesive film)
40 Preform Assembly 50 Outer Preform 51 Outer Portion 51a Male Screw 52 Outside Air Inlet 53 Stretching Portion 54 Neck Ring 55 Deposition Film 60 Inner Preform 61 Inner Portion Portion 62 Expanding Portion 63 Flange Portion 64 Stretching Portion O Axis S Containment space

Claims (7)

A laminated release container made of synthetic resin formed by blow molding a preform assembly in which an inner preform is incorporated inside an outer preform,
An outer layer body provided with a cylindrical outer opening and a bottomed cylindrical trunk connected to the outer opening;
An inner layer body including a cylindrical inner mouth portion disposed inside the outer mouth portion and a volume-reducing and deformable accommodating portion that is detachably stacked on the inner surface of the trunk portion;
An outside air inlet for introducing outside air between the outer layer body and the inner layer body,
A delamination container, wherein a vapor deposition film is provided on at least one of the inner surface of the body portion and the outer surface of the housing portion.   The delamination container according to claim 1, wherein the vapor deposition film is provided dispersed in a number of vapor deposition film pieces.   The laminated peeling container according to claim 1 or 2, wherein the outer layer body and the inner layer body are each formed of a polyethylene terephthalate resin.   The delamination container according to any one of claims 1 to 3, wherein the vapor-deposited film is formed of silicon oxide.   5. The delamination according to claim 4, wherein an adhesive film formed of an organosilicon compound is provided between the inner surface of the body portion on which the deposited film is provided or the outer surface of the housing portion and the deposited film. container.   The delamination container according to any one of claims 1 to 5, wherein the vapor deposition film is provided only on the inner surface of the body portion.   The delamination container according to any one of claims 1 to 6, wherein the vapor deposition film has a thickness of 100 nm or more and 300 nm or less.

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