JP2004299784A - Sheet-like cover body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive sheet-like cover body with a hot water drain opening which is suitable for a container having an air-tight characteristic, is convenient because it is not troublesome to drain hot water speedily, safely and surely, and above all which is not likely to be dropped. <P>SOLUTION: This sheet-like cover body is provided with a holding tab for forming a hot water discharge opening and a holding tab for opening and for forming a hot water pouring opening. The cover body has a front base material and a back base material laminated through an adhesive layer.The area between the front base material and the back base material is divided into two areas, i.e. a separable area comprising a half-tone dot separation layer on the side of the holding tab for forming the discharge opening and an inseparable area adjoining the separable area. A separation cut line is formed on the tab for forming the discharge opening in the separable area, and the first hot water discharge opening forming cut line is formed on the tab side for opening and for forming the pouring opening in the separable area. Each line is formed from the back base material, i.e. the inner face side, partially touching the front base material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sheet-like lid used for a packaging container for instant noodles and the like, and more specifically, a use for performing hot water draining after noodles are reconstituted in a container such as instant food such as fried noodles and raw noodles. The present invention relates to a sheet-like lid used for the present invention.

  Conventionally, containers that are used after hot-watering noodles in containers such as fried noodles and raw noodles are used for instant noodles such as fried noodles and bags of raw noodles in a plastic molded container body such as expanded polystyrene. Ingredients, seasonings, etc. are housed, and a plastic molded lid with a notch serving as a hot water outlet provided on the periphery is fitted into the plastic molded container body, and the whole is packaged with a shrink film, and is generally used. ing.

  However, this kind of container is problematic in that the operation of attaching and detaching the lid to and from the container body is troublesome, and the operation of securing the through-hole by opening the notch provided in the lid is quite troublesome, and when the notch is manually raised. The problem that the finger may be injured, the notch for securing the through hole can be formed only in a part of the flange portion, so that it takes a little time to drain the hot water, Water must be drained while holding the container body and lid, but there is a risk that hot water may be spilled due to the large amount of hot water required for hot water reconstitution with respect to the container capacity. When spilling, there is a problem that there is a danger of burns.Also, when the hot water is drained, the container must be tilted and drained from the through hole, but a considerable weight of noodles containing hot water is unevenly distributed on one side, so the container Body It is necessary to press the container body and the lid with a predetermined force or more so that the lid does not come off, problems such as tiredness of fingers and problems such as hot, and sometimes spilled noodles from the container, and furthermore, However, although the container is covered with a shrink film, there is a problem that the container body and the lid are not sealed, and insects and the like may be mixed.

  As a solution to the above-mentioned problem of the container made of a plastic molded product, a sheet-like lid whose inner layer is made of a thermo-adhesive resin is used instead of the plastic molded lid, and this is heated by the flange portion of the plastic molded container body. At the time of bonding and sealing and hot water reconstitution, a pouring port is formed using a pouring port forming means provided in advance on the sheet-like lid, and pouring is performed. There is a container in which a drain hole is formed using the drain hole forming means provided and the hot water is discharged from the drain hole (for example, see Patent Document 1).

The container described in Patent Document 1 has an excellent effect of solving the above-mentioned problem of the container made of a plastic molded product. However, the lid has a peeling region between the layers of the lid and the peeling. It is necessary to provide at least a non-peeling area in the area, and to provide a half-cut for forming a hot water outlet that serves as a hot water outlet for discharging hot water so as to substantially coincide with the non-peeling area. The reason for this is that if the position of the non-peeling area and the half-hole for forming the drain hole are shifted, the half-cut for forming the drain port will be formed in the peeling area, and the half-cut part for forming the drain port will be processed by the lid. This is because there is a possibility that the product will sometimes fall off or fall on the contents such as instant noodles after the product is made. Therefore, the alignment between the non-peeling area and the drain cut half-cut is a rather complicated operation, and the die roll or the like for forming the drain cut half-cut is one point uniform according to the size of the lid. Therefore, it goes without saying that the management is complicated, and as a result, the cost is increased.
Japanese Utility Model Publication No. 61-3810

  Therefore, the present invention provides a sheet-like lid body which is excellent in the sealing property as a container, can be easily, quickly, safely, and securely drained without the trouble of the draining operation. An object of the present invention is to provide an inexpensive sheet-like lid having a hot water outlet which is free from the risk of occurrence.

  In order to solve the above-mentioned problems, the present invention according to claim 1 has a heat-sealing portion formed on an upper peripheral surface forming the opening of a bottomed container body having an opening on an upper surface. A sheet-like sheet having substantially the same outer shape as the opening portion which is thermally bonded and sealed so that it can be peeled off, and provided with a pick-out piece for forming a drain hole and a pick-out piece for forming an opening and pouring port at opposing positions of a peripheral edge. In the lid, the sheet-shaped lid is formed by laminating a front base material and a back base material with an adhesive layer interposed between the front base material and the back base material on the side of the drainage port forming tab. It is divided into two areas, a peeling area composed of a halftone dot release layer and a non-peeling area adjacent to the peeling area, and a separating line for peeling is on the inner surface side on the side of the drainage port forming knob protruding piece side of the peeling area. From the backing substrate is provided so that a part thereof reaches the front substrate and from the cutting line for peeling. A protrusion protruding toward the drain port forming knob protruding piece side for forming a drain port in the peeling area on the opening and pouring port forming knob protruding piece side and extending away from both ends of the protruding section. The drain port forming knob projection and the opening and pouring port formation such that a first drain port forming cut line formed of a curved portion extends from the back base material on the inner surface side to a part of the front base material. And a horizontal line is provided at a predetermined interval in parallel with a direction perpendicular to a straight line connecting the knob and the projection.

  According to a second aspect of the present invention, in the sheet-like lid according to the first aspect, the peeling cut line connects the pick-out piece for forming the drain hole and the pick-out piece for forming the opening and pouring port. It has an axis parallel to the direction perpendicular to the straight line, and has a substantially continuous waveform having an inflection point at a position equidistant from the axis. The inflection point is formed at a position that becomes the circumferential heat bonding portion in the vicinity of the tapping piece for forming a drain hole.

  According to a third aspect of the present invention, in the sheet-like lid according to any one of the first and second aspects, a drain port is provided on the separation line side of the first drain port forming line in the separation region. A second cutout forming line for forming a drain hole is formed at a predetermined interval in parallel to a direction perpendicular to a straight line connecting the picking protrusion for forming the drainage hole and the picking protrusion for opening and pouring. It is characterized in that a plurality of rows are provided in a horizontal row or in a staggered manner.

  According to a fourth aspect of the present invention, in the sheet-like lid according to any one of the first to third aspects, the peeling corresponding to the peeling cut line and / or the second drain hole forming cut line. The region is formed of a solid release layer.

  According to a fourth aspect of the present invention, in the sheet-like lid according to any one of the first to third aspects, the halftone dot release layer has a halftone dot area ratio of 50 to 95%. It is assumed that.

  The sheet-like lid of the present invention is provided with a non-peeling area in the peeling area as described in the section of the prior art, and from a half-cut for forming a hot water outlet for discharging hot water so as to substantially coincide with the non-peeling area. It is not necessary to provide a hot water outlet, and a first and a second hot water outlet forming cutting line and a separating line for peeling are formed continuously as hot water outlets for discharging hot water to a peeling area provided continuously in the winding direction. Therefore, it is possible to eliminate the rather complicated operation of aligning the non-peeling area and the half-cut for forming the drain hole according to the related art, so that the productivity can be improved and the cost can be reduced accordingly. There is no danger of falling off on the contents such as instant noodles at the time of processing or after the part serving as the drain outlet becomes a product, and the die roll provided with a protruding blade for forming the drain outlet is a sheet-like lid body. Shared regardless of size In which exhibits an excellent effect capable. Furthermore, the sheet-like lid of the present invention has an excellent effect that it is excellent in the sealing property as a container, and can be easily, quickly, and safely and securely drained without the trouble of the draining operation. Is played.

The present invention will be described in detail below with reference to the drawings and the like.
FIG. 1 is a schematic perspective view of a container using the sheet-like lid according to the present invention, FIG. 2 is a rear view showing a first embodiment of the sheet-like lid according to the present invention, and FIG. 3 is XX of FIG. FIG. 4 is a perspective view of a main part of the sheet-like lid body shown in FIG. 2, FIG. 5 is an enlarged view of a cut line for forming the first drain port shown in FIG. 2, and FIG. 6 is a sheet-like lid according to the present invention. FIG. 7 is a view showing a main part of another example of a separating line for peeling provided on a body, FIG. 7 is a view corresponding to FIG. 4 showing a second embodiment of a sheet-like lid according to the present invention, and FIG. FIG. 9 schematically shows a third embodiment of a sheet-like lid, corresponding to FIG. 2, and FIG. 9 shows a main part of another example of a second drainage hole forming cut line provided in the sheet-like lid according to the present invention. FIG. 10 is a plan view showing a state in which a container using the sheet-like lid according to the first embodiment of the present invention is drained, and FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows the state which drains the container using the sheet-shaped lid body of embodiment, and 1,1 ', 1 "in the figure is a sheet-shaped lid body, 2 is a picking protrusion for opening and pouring a spout. Reference numeral 3 denotes a pick-out piece for forming a drain hole, 4 denotes a peeling area, 5 denotes a non-peeling area, 6, 6 ′ denotes a cutting line for separating, 7, 7 ′ denotes a cutting line for forming a first drain port, and 7a denotes a substantially U-shape. 7b is a curved portion, 10 is a front substrate, 20 is a back substrate, 30 is an adhesive layer, 40 is a halftone release layer, 41 is a solid release layer, 50 is a container body, and 51 is a container body. The upper peripheral surface of the opening, A is a container, H is a position to be a peripheral heat bonding portion, K and K1 are drain outlets, F is a drain lid, and α is an inflection point.

  FIG. 1 is a schematic perspective view of a container using a sheet-like lid according to the present invention. The container A has the opening (not shown) of a container body 50 having an opening (not shown) on the upper surface. A sheet having substantially the same outer shape as the opening (not shown) having, on an outer peripheral surface thereof, an opening / pouring port forming knob protrusion 2 and a drain hole forming knob protrusion 3 opposed to each other on an upper peripheral surface 51 to be formed. The lid 1 is heat-bonded releasably at a peripheral heat bonding portion (not shown) and sealed. In FIG. 1, the front side of the lid 1 is visible.

  2 is a rear view showing a first embodiment of the sheet-like lid according to the present invention, FIG. 3 is an enlarged sectional view taken along line XX of FIG. 2, and FIG. 4 is a perspective view of a main part of the sheet-like lid shown in FIG. FIG. 5 and FIG. 5 are enlarged views of the cut line for forming the first drain hole shown in FIG. 2, and the sheet-like lid 1 has a front base material 10 and a back base material 20 laminated with an adhesive layer 30 interposed therebetween. Between the adhesive layer 30 and the backing substrate 20, a peeling area 4 in which a halftone release layer 40 is provided on the side of the drainage port forming knob 3, and a non-peeling area adjacent to the peeling area 4. 5 and the halftone release layer 40 and the adhesive layer 30 from the backing substrate 20 where the separating line 6 for peeling is located on the inner surface side of the picking piece 3 for forming a drain hole in the peeling region 4. The zigzag shape so that a part thereof reaches the front base material 10 through the front base material 10 in an uncut state at the apex thereof, and The peeling is provided in parallel with a direction perpendicular to a straight line connecting the opening and pouring port forming knob 2 and the opening and pouring port forming knob 2 from the separating line 6. A substantially U-shaped protruding portion 7a protruding to the side of the discharge spout forming knob 3 for forming a hot water outlet in the region 4, and curves extending away from both ends of the substantially U-shaped protruding portion 7a. The drain port forming knob 3 and the unsealing part are arranged such that a part of the first drain port forming cutting line 7 composed of the portion 7b reaches the front substrate 10 from the back substrate 20 on the inner surface side. It is provided in a horizontal line at a fixed interval in parallel to a direction perpendicular to a straight line connecting the knob 2 and the pouring port forming knob. Therefore, the separating line 6 for peeling and the cutting line 7 for forming the first drain hole can be seen from the back side (inner side) of the sheet-like lid 1 as shown in FIG. Can not. In FIG. 2, the arc-shaped dashed line connecting both rising portions of the opening and pouring port forming knob 2 and the drain port forming knob 3 is an opening of the container body 50 (see FIG. 1). It shows the position of the outer peripheral edge (not shown), and the arc-shaped broken lines shown in other figures have the same meaning. The separating line 6 for peeling is formed at the position of the outer peripheral edge of the opening (not shown) of the container main body 50 (see FIG. 1) of the tapping piece 3 for forming the drain hole or at the distal end side from this position.

  Further, the reason why the curved portion 7b extending so as to be separated from both ends of the substantially U-shaped projecting portion 7a in the first cutout line 7 for forming a drain hole is provided is as follows. When the forming tab 3 is pinched and peeled, the peeling interface shifts to the halftone dot release layer 40 at the peeling cutting line 6 and, when the peeling operation is further continued, as shown in FIG. The back substrate 20 in a region surrounded by the gate forming cut line 7 is peeled off in a state where the back substrate 20 adheres to the front substrate 10 by the effect of the halftone dot release layer 40, and the back substrate on which the drain gate K is formed is formed. The drainage lid F made of the material 20 is formed in a state of being adhered to the container body 50, and further separated by the effect of the curved portion 7b (see FIG. 5) provided in the first drainage hole forming cutting line 7. At the same time as the operation is blocked, This is because you can stop.

  The size and number of the first drain port forming cutting lines 7 provided in the peeling region 4 are not limited to the illustrated sizes and numbers, and the shapes thereof are not limited to those illustrated, but may be the curved portions 7b. And a shape having a protruding portion 7a protruding on the side of the drainage port forming knob protruding piece 3 as long as it does not deviate from the gist of the present invention. Also, the separating line 6 for peeling is not limited to the zigzag shape illustrated as an example. For example, a large number of oblique lines may be arranged in a staggered pattern as shown in FIG. , C-shaped, C-shaped, 1-shaped, 10-shaped, and X-shaped are provided at minute intervals with the discharge port forming knob 3 and the opening and pouring port forming. It suffices that a plurality of rows be provided in a row or in a staggered manner in parallel with a direction orthogonal to a straight line connecting the picking projection 2.

  Further, by forming the peeling region 4 with the halftone dot release layer 40, when the die is cut into the shape of the sheet-like lid 1, the peeling region 4 is partially formed by the front base material 10 and the back base material 20. It is possible to prevent peeling from this part because of the fact that the first drain hole is formed, and when the peeling operation is performed with the knob 3 for drain hole formation being pinched as described above, the first drain hole is formed. The back substrate 20 in a region surrounded by the forming cut line 7 is peeled off in a state where the back substrate 20 is adhered to the front substrate 10, and is formed of the back substrate 20 in which a drain hole K is formed as shown in FIG. 10. The drainage lid F is formed in a state of being adhered to the container body 50. The halftone dot area ratio of the halftone dot release layer 40 is suitably from 50 to 95%. If the halftone dot area ratio is lower than 50%, peeling becomes difficult, and there is a possibility that a drain hole cannot be formed. If it is higher than 95%, the front base material 10 and the back base material 20 may be peeled off from this portion when the sheet-like lid 1 is die-cut, and the drainage port forming knob 3 may be removed. When the pinch and peeling operation is performed, there is a possibility that the back substrate 20 in a region surrounded by the first drain hole forming cutting line 7 may not be peeled while being adhered to the front substrate 10, and the first drainage may be performed. Depending on the shape of the gate forming cutting line 7, there is a possibility that drainage cannot be performed smoothly. In FIG. 4, the peeling region 4 composed of the halftone dot release layer 40 extends beyond the curved portion 7 b of the first drainage hole forming cutting line 7 to the side of the opening and pouring gate forming knob 2. However, since the peeling operation is prevented by the effect of the curved portion 7b when the picking piece 3 for forming the drain hole is picked and peeled, the opening and pouring port for forming the opening of the peeling region 4 is formed. The boundary of the picking projection 2 side may be formed so as to substantially coincide with the curved portion 7b of the first drainage port forming cutting line 7.

  FIG. 7 is a view corresponding to FIG. 4 showing a second embodiment of the sheet-like lid according to the present invention, wherein the sheet-like lid 1 ′ is the first cover of the sheet-like lid 1 shown in FIG. A substantially horseshoe-shaped second drainage hole forming cutting line 7 ′ is provided between the drainage hole forming cutting line 7 and the separation line 6 so that both ends thereof are positioned on the drainage hole forming picking piece 3 side, and 4 in which the stripping area 4 corresponding to the stripping line 6 and the second drain port forming line 7 ′ is formed by a solid release layer 41. It is the same as the sheet-like lid 1 shown. With this configuration, the first drain port forming cutting line 7 and the second drain port forming cutting line 7 ′ can be used as drain ports, so that the draining speed can be improved. Also, a desired hot water discharge speed can be easily obtained.

  By the way, in the embodiment, the shape of the second drain hole forming cutting line 7 ′ has a substantially horseshoe shape. However, the shape is not limited to this as long as the drain hole can be formed. Although not shown, the shape may be a V-shape, a U-shape, or the like, or may be arranged in a horizontal line in parallel with the separating line 6 without being arranged in a staggered manner. Alternatively, a large number of straight lines as shown in FIG. 9A and a large number of curved lines as shown in FIG. 9B may be arranged in a staggered manner. Further, in the embodiment, the peeling region 4 corresponding to the peeling cut line 6 and the second drain hole forming cut line 7 ′ is formed by the solid release layer 41. The dot release layer 40 may be used, or any of them may be the dot release layer 40.

  FIG. 8 is a diagram corresponding to FIG. 2 schematically showing a third embodiment of the sheet-like lid according to the present invention, wherein the sheet-like lid 1 ″ is the same as the sheet-like lid 1 shown in FIG. In place of the zigzag peeling cut line 6 with the apex portion in an uncut state, a straight line connecting the drainage port forming knob 3 and the opening and pouring hole forming knob 2 is formed. 8 has an axis parallel to the direction perpendicular to the axis (indicated by a dashed line in FIG. 8), and has a separating line 6 ′ having a continuous substantially waveform having an inflection point at a position equidistant from the axis. And the inflection point α located on the side of the drain port forming knob 3 of the substantially waveform of the separating line 6 ′ is the circumferential thermal bonding near the drain port forming knob 3. It is the same as the sheet-like lid 1 shown in Fig. 2 except that it has a configuration formed at a position H serving as a part. By this, the sheet-like lid 1 ″ is thermally bonded releasably to the upper peripheral surface 51 of the container main body opening portion of the bottomed container main body 50 having an opening on the upper surface at a position H to be a peripheral heat bonding portion. Then, when draining the hot water, the pick-out piece 3 for forming a drain port is picked up by a finger and peeled off. First, the back base material 20 is adhered to the front base material 10. When the peeling is performed from the upper peripheral surface 51 of the container body opening portion, the peeling cut line 6 ′ having a substantially waveform is reached, the molten metal is transferred to the halftone dot release layer 40, and the drain hole K 1 is formed. As shown in FIG. 11, the back substrate 20 in a region surrounded by the first drain hole forming cutting line 7 is peeled off while being bonded to the front substrate 10 by the effect of the halftone dot release layer 40, The drainage lid F made of the backing substrate 20 having the drainage opening K is adhered to the container body 50. With the effect of the curved portion 7b (see FIG. 5) provided on the first drainage port forming cutting line 7, further stripping operation is prevented and the drainage lid F is torn. Can also be prevented. In addition, since the hot water outlet K1 is formed so as to be connected to the inner edge of the upper peripheral surface 51 of the container main body opening, the hot water can be almost completely drained and the draining speed can be improved. . The reference numerals shown in FIGS. 8 and 11 have the same meanings as those shown in FIGS.

Next, the front base material and the back base material constituting the sheet-like lid of the present invention will be described. The front substrate 10 may be a single layer or a multi-layer as long as the substrate has at least a printable substrate, and the back substrate 20 may include at least a heat-adhesive resin layer. The configuration is not particularly limited as long as it has a configuration provided with, and various configurations can be adopted depending on physical properties required for the sheet-like lids 1, 1 ', 1 ". lid 1,1 ', 1 if the waist is required to ", the table base 10 as 40 g / m ² or more paper, more particularly of 50 to 80 g / m ² coated paper or bleached kraft Paper is suitable and has a surface gloss for a luxurious design, or as one of the cores when the sheet-like lid 1, 1 ', 1 "is peeled off from the container. From polypropylene, polyester, polyamide, etc. A film made of a synthetic resin having a thickness of 6 to 20 μm stretched in a uniaxial or biaxial direction can be used for the surface layer, and when the sheet-like lids 1, 1 ′, 1 ″ are required to have dead-hold suitability. In the layer structure, aluminum foil can be used as the backing substrate 20, and in the case where strength is required for the backing substrate 20, uniaxial or biaxial directions such as polypropylene, polyester, and polyamide are used. A stretched synthetic resin film having a thickness of 6 to 20 μm can be used in the layer structure. The above-mentioned paper, synthetic resin film, aluminum foil, etc. constituting the front base material 10 and the back base material 20 can be easily adhered to the required surface by corona discharge treatment, ozone treatment, plasma treatment, etc., if necessary. Processing can be appropriately performed.

  In addition, the heat-adhesive resin layer used for the backing substrate 20 needs to be configured to be thermally adhered to the container main body 50 (see FIG. 1) in a releasable manner. It is important that the container body 50 (see FIG. 1) is appropriately selected and used depending on the material to be used. However, the container body 50 is usually made of polystyrene paper, a high-impact polystyrene sheet, a polypropylene sheet, a laminated sheet of polyamide and polyethylene or polypropylene, and a polyethylene and polypropylene sheet. A container formed by molding a laminated sheet or the like by a known vacuum forming method or a pressure forming method, a container formed by injection molding a resin for injection molding such as polypropylene, polystyrene, polyester, or various types of injection molding Injection molding of resin for multiple layers to give, for example, oxygen gas barrier properties, etc. Is a container made of expanded styrene, a container made of paper, or a double container made of these, and the like, so that polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, ethylene-acetic acid is used as the heat-adhesive resin layer. Vinyl copolymer, chlorinated polyethylene, chlorinated polypropylene, ionomer resin, vinyl chloride-vinyl acetate copolymer, acrylic resin, methacrylic resin, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene By appropriately selecting and using an acrylic ester copolymer, an ethylene-methacrylic ester copolymer, a polyester resin, or the like, it is possible to releasably and thermally adhere to the container body 50.

Next, the release layer and the adhesive layer constituting the sheet-like lid of the present invention will be described.
The release agent forming the halftone dot release layer 40 and the solid release layer 41 should be appropriately selected according to a method of designing a surface to be coated or a release interface on which the release agent is applied. There is no particular limitation, and the coating amount of the halftone release layer 40 and the solid release layer 41 should be determined appropriately. As the adhesive layer 30 for laminating the front base material 10 and the back base material 20, a polyethylene layer formed by heating and melt extruding polyethylene or the like using a T-die extruder is suitable. In this case, a well-known appropriate anchor coating agent can be applied to a required surface as needed.

Next, a typical layer structure of the sheet-like lid of the present invention is exemplified as follows: (1) [Picture printing layer / paper] / release layer // polyethylene layer (adhesive layer) / heat-adhesive resin layer , (2) [pattern printed layer / paper] / release layer // polyethylene layer (adhesive layer) / aluminum foil / heat-adhesive resin layer , (3) [pattern printed layer / paper] / release layer // polyethylene Layer (adhesive layer) / synthetic paper / heat-adhesive resin layer , (4) [Picture print layer / paper] / release layer // polyethylene layer (adhesive layer) / synthetic resin film / polyethylene layer / aluminum foil / heat Adhesive resin layer , (5) [synthetic resin film / pattern printing layer / polyethylene layer / paper] / release layer // polyethylene layer (adhesive layer) / synthetic resin film / polyethylene layer / aluminum foil / thermal adhesion Resin layer , (6) [synthetic resin film / pattern printing layer / polyethylene layer / synthetic resin Film] / release layer // polyethylene layer (adhesive layer) / synthetic resin film / polyethylene layer / aluminum foil / heat-adhesive resin layer , (7) [pattern printing layer / paper] / polyethylene layer (adhesive layer) / Release layer // aluminum foil / heat-adhesive resin layer , (8) [pattern printing layer / paper] / polyethylene layer (adhesive layer) / release layer // synthetic paper / heat-adhesive resin layer , (9) [ Picture print layer / paper] / polyethylene layer (adhesive layer) / release layer // synthetic resin film / polyethylene layer / aluminum foil / heat-adhesive resin layer , (10) [synthetic resin film / pattern print layer / polyethylene Layer / paper] / polyethylene layer (adhesive layer) / release layer // synthetic resin film / polyethylene layer / aluminum foil / heat-adhesive resin layer . In the above layer configuration, the layer surrounded by [] is the front substrate 10, the underlined layer is the back substrate 20, and the portion indicated by // is the peeling interface.

  Next, the present invention described above will be specifically described with reference to examples.

A release agent (colored with a blue pigment) made of an acrylic resin by gravure printing on one surface of a biaxially oriented polypropylene film (hereinafter referred to as OPP) of 20 μm that has been subjected to a corona discharge treatment on both sides and isocyanate Region is composed of a halftone dot release layer (halftone dot area ratio: 85%) formed of a release agent by printing an anchorage agent endlessly in the winding direction so as to be adjacent to each other, and isocyanate type anchor agent application A printed film having a non-peeled region 5 formed of a surface was formed. The coated surface of this print film and the bleached kraft of 50 g / m ² were extruded with a T-die extruder from a hot-melt polyethylene to a thickness of 15 μm and sandwich-laminated to produce a first intermediate laminate. Thereafter, an imine-based anchoring agent was applied to the other surface of the OPP surface of the first intermediate laminate, and this applied surface and one surface of the 7 μm aluminum foil were heated to a thickness of 15 μm using a T-die extruder. And extrude it into a sandwich lamination, and extrude an ethylene-methacrylic acid copolymer (hereinafter referred to as EMAA) to a thickness of 20 μm on the other surface of the aluminum foil using a T-die extruder to form a second intermediate laminate. Produced. Then, the separating line 6 for peeling and the cutting line 7 for forming the first drain hole are formed in the peeling region 4 by a die roll provided with a protruding blade for forming the separating line 6 for separating and the first discharging hole forming line 7 on the circumference. It is processed endlessly in the winding direction so that a part of the second intermediate laminate is provided on the bleached kraft from the side on which the ethylene-methacrylic acid copolymer is provided, as shown in FIG. A third intermediate laminate to be related was produced. Further, the bleached kraft surface of the third intermediate laminate and a 12 μm biaxially stretched polyethylene terephthalate film (hereinafter referred to as PET) provided with a beautiful pattern printing layer on one surface by a gravure printing method in advance. After the isocyanate-based anchor agent is applied to the pattern printing layer, the anchor agent application surface is positioned on the exposed kraft side, and the width direction of the pattern printing layer and the release layer are aligned. A hot-melt polyethylene was extruded with a T-die extruder so as to have a thickness of 15 μm, and sandwiched and laminated to produce a long sheet-like laminate. In the long sheet-like laminate, the front substrate 10 is PET 12 μm / pattern printed layer / polyethylene 15 μm / bleached kraft 50 g / m ² , and the back substrate 20 is OPP 20 μ / polyethylene 15 μm / aluminum foil 7 μm / EMAA 20 μm, and the peel interface in this case is between the release layer and the OPP. In this example, a release agent colored in blue was used to facilitate alignment in the width direction, but the color pigment is not limited to blue and may not be colored. .

  After that, the long sheet-like laminate was cut into large pieces into small pieces, cut into small pieces, and punched into the shape shown in FIG. 2 to obtain a sheet-like lid of the present invention. This sheet-like lid was thermally bonded to a polystyrene container main body containing instant noodles with a cup sealer to produce the container shown in FIG. 1, and thereafter, a knob for opening and pouring a spout shown in FIG. The piece 2 is pinched by a finger, the opening of the polystyrene container body is peeled off by about １ ／ to open the opening, a predetermined amount of hot water is poured from this opening, and the opening is sealed with a sheet-like lid. After the elapse of a predetermined time, when the pick-out piece 3 for forming a drain hole is picked up with a finger and peeled off, the peeling interface shifts to the peeling area 4 composed of the halftone dot release layer 40 along the separating line 6 for peeling, and the peeling operation is further continued. As shown in FIG. 10, the back substrate 20 in a region surrounded by the first drain hole forming cutting line 7 is peeled off while being bonded to the front substrate 10 by the effect of the halftone dot release layer 40, The drainage lid F composed of the backing substrate 20 having the drainage opening K formed thereon is It is formed in a state of being adhered to the vessel main body 50, and further the peeling operation is prevented by the effect of the curved portion 7b provided in the first drainage port forming cutting line 7, thereby preventing unnecessary peeling operation. If the drainage operation was performed in this state, the noodles could be smoothly drained from the drainage port K without flowing out.

  As described in the examples, the sheet-like lid of the present invention has a release line, a separation line for release provided in a release region formed by the release layer, and a first and second cut line for forming a drain hole. Positioning can be performed only in a direction (width direction) orthogonal to the winding direction, and the sheet can be provided endlessly in the winding direction. Since it can be easily manufactured, it can be manufactured with high productivity.

It is a schematic perspective view of the container using the sheet-like lid concerning the present invention. It is a rear view showing a 1st embodiment of a sheet lid concerning the present invention. FIG. 3 is an enlarged sectional view taken along line XX of FIG. 2. FIG. 3 is a perspective view of a main part of the sheet-like lid shown in FIG. 2. FIG. 3 is an enlarged view of a cutting line for forming a first drain port shown in FIG. 2. It is a figure which shows the principal part of other Example of the peeling cut line provided in the sheet-shaped lid body concerning this invention. It is a figure corresponding to Drawing 4 showing a 2nd embodiment of a sheet-like lid concerning the present invention. It is a figure corresponding to Drawing 2 which shows a 3rd embodiment of a sheet-like lid concerning the present invention schematically. It is a figure which shows the principal part of another Example of the cutting line for 2nd drainage opening formation provided in the sheet-shaped lid body concerning this invention. It is a top view which shows the state which drains the container using the sheet-shaped lid body concerning this invention. It is a top view showing the state where a container using the sheet-like lid of a 3rd embodiment concerning the present invention is drained.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1, 1 ', 1 "Sheet-shaped lid 2 Opening and pouring port forming knob 3 Piece for discharging hole forming knob 4 Peeling area 5 Non-peeling area 6, 6' Peeling cutting line 7, 7 'First Cut line for forming a drain hole 7a Substantially U-shaped protrusion 7b Curved portion 10 Front base material 20 Back base material 30 Adhesive layer 40 Halftone release layer 41 Solid release layer 50 Container body 51 Upper peripheral surface of container body opening A Container H Position to become the circumferential heat bonding part K, K1 Drain outlet F Drain cover α Inflection point

Claims (5)

The bottomed container body having an opening on the upper surface has substantially the same outer shape as the opening and is sealed to the upper peripheral surface forming the opening by the peripheral heat bonding portion so as to be peelable with a peripheral heat bonding portion, and the peripheral edges are opposed to each other. In the sheet-like lid body provided with a tapping piece for forming a drain hole and a gripping piece for opening and pouring a hole at a position where the front base material and the back base material have an adhesive layer interposed therebetween. The layers between the front base material and the back base material are laminated between a peeling region composed of a halftone dot release layer located on the side of the tapping protrusion for forming the drain hole and a non-peeling region adjacent to the peeling region. A separation line is provided on the side of the discharge port forming knob protruding piece side of the separation area, from the back substrate, which is on the inner surface side, to a part of the front substrate, and the separation line is provided. A drain hole is formed in the peeling area on one side of the tab for opening and pouring from the cut line. The back base material, in which a first drainage port forming cutting line composed of a protruding portion protruding to the side of the drainage port forming knob protruding piece and a curved portion extending away from both ends of the protruding portion is located on the inner surface side. A predetermined interval is provided in parallel to a direction orthogonal to a straight line connecting the pick-out piece for forming the drain hole and the pick-out piece for forming the opening and pouring port so that a part thereof reaches the front base material. A sheet-like lid body provided in a horizontal line. The separating line for peeling has an axis parallel to a direction orthogonal to a straight line connecting the picking piece for forming the drain hole and the picking piece for forming the opening and pouring port, and is equidistant from the axis. It consists of a continuous substantially waveform having an inflection point at a distant position, and the inflection point located on the side of the drain port forming knob protruding piece side of the substantially waveform is the circumferential heat near the drain port forming knob protruding piece. The sheet-like lid according to claim 1, wherein the sheet-like lid is formed at a position to be an adhesive portion. A second drain port forming cut line for forming a drain port on the stripping cut line side of the first drain port forming cut line in the peeling area is formed by the drain port forming knob projection and the opening and pouring port. 3. The method according to claim 1, wherein a plurality of rows are provided in a single row or in a staggered manner at predetermined intervals in parallel to a direction orthogonal to a straight line connecting the tabs. Sheet lid. The sheet-like lid according to any one of claims 1 to 3, wherein the peeling region corresponding to the peeling cut line and / or the second drain hole forming cut line is formed of a solid release layer. . The sheet-like lid according to any one of claims 1 to 4, wherein the halftone dot release layer has a halftone dot area ratio of 50 to 95%.

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