JP5739607B2 - Lid - Google Patents

Description

  The present invention relates to a lid for sealing an opening of a cup container used as a packaging container for food or the like.

  As a lid for sealing an opening of a packaging container for food or the like, a configuration in which paper or a resin film and an aluminum foil are laminated is widely used.

  Aluminum foil is soft and foldable and has excellent shape retention capability. By using a material having such properties, when the lid of a packaging container such as food is opened, the lid can be imparted with a property capable of maintaining the opened state (hereinafter referred to as “dead hold property”). It is possible to improve the usability of the user when taking out food or the like inside the container.

JP 2001-10657 A JP 2002-37311 A JP 2002-104513 A JP 2003-95336 A

  For lids containing aluminum foil as described above, it is difficult to separate when packaging materials are discarded, aluminum itself is not a material suitable for incineration, and internal inspection of products using metal detectors is difficult. There are problems such as.

  Therefore, in recent years, a lid having a laminated structure of paper or a resin film may be used instead of the lid using the aluminum foil as described above.

  However, the lid made of a laminated structure of paper or resin film has a problem that the dead hold property is insufficient because the lid that has been partially opened attempts to return to its original state by the repulsive force of the material. .

  Therefore, an object of the present invention is to provide a lid for a cup container excellent in dead hold property without using aluminum.

The present invention is a lid that seals an opening of a cup container, and is formed of one or both of paper and a resin film, one surface of which is sealed by the opening, and a paper and a resin film And a second sheet attached to the other surface of the first sheet. A 1st sheet | seat has the strip | belt-shaped 1st area | region containing a part of outer periphery and another part, and the 2nd area | region and 3rd area | region isolate | separated by the 1st area | region. Further, the first region and the second region are cut, and the first region and the second sheet of the first sheet are detachably bonded at the boundary surface, and the third region and the second sheet of the first sheet are bonded to each other. The adhesive strength of the first sheet is set to be higher than the adhesive strength between the first region of the first sheet and the second sheet, and the first region of the first sheet and the second sheet are attached via a release layer. The second region and the third region of the first sheet are bonded to the second sheet via an adhesive, and the boundary line between the first region and the third region is a straight line, and a part of the second sheet is formed. A straight perforation extending along the boundary line between the first region and the third region is formed only in the layer, and no perforation is formed in the layer provided on the upper layer of some layers . A part of the two regions protrudes outward, and the second region and the second sheet of the first sheet are integrally formed with the cup container. An opening tab that peels and opens from the mouth, and a part of the third region protrudes outward, and the first region of the first sheet, the third region, and the second sheet are integrated into the opening of the cup container. And a fully opened tab to be peeled off.

  If comprised in this way, when opening from the 2nd area | region side of a 1st sheet | seat toward the 3rd area | region side at the time of use, the 1st sheet | seat and the 2nd sheet | seat peeled in the 1st area | region, and were isolate | separated from the cup container. A part of the lid is connected to the cup container only through the second sheet at the boundary between the first region and the third region.

  According to the present invention, since the repulsive force of the lid can be reduced by partially delaminating a part of the lid when it is opened, a lid excellent in dead hold property is realized without using an aluminum foil. It becomes possible to do.

The top view of the lid concerning an embodiment of the present invention Back view of the lid shown in FIG. Sectional drawing along the AA 'line of the cover body shown in FIG. The perspective view which shows the use condition of the packaging container using the cover which concerns on embodiment of this invention. Top view of the packaging container shown in FIG. Sectional drawing along the BB 'line shown in FIG.

  FIG. 1 is a plan view of a lid according to an embodiment of the present invention, and FIG. 2 is a back view of the lid shown in FIG. FIG. 3 is a cross-sectional view of the lid shown in FIG. 1 taken along the line AA ′.

  The lid 1 is for sealing the opening 3 of the cup container 2 used as a packaging container for foods and the like, and a first sheet 7 whose one surface is sealed to the opening 3 of the cup container 2. And a second sheet 8 adhered on the other surface of the first sheet.

  The 1st sheet | seat 7 is a sheet | seat body which consists of a material which does not contain aluminum, and is specifically formed with the single body of paper or a resin film, or the laminated body of paper and a resin film. Each laminated material constituting the first sheet 7 is subjected to printing for displaying merchandise or the like and light-shielding printing for improving the light-shielding property of the lid 1.

  As the paper material, for example, double art paper, single art paper, double side coated paper, single side coated paper or synthetic paper can be used. As the resin film, for example, a polyethylene terephthalate (PET) film having a thickness of 6 to 40 μm, a biaxially stretched polyethylene (0PE) film, a biaxially stretched nylon (ONy) film, a biaxially stretched polypropylene (OPP), or the like can be used. .

  On the exposed surface (the lower surface in FIG. 3) of the first sheet 7, a heat seal layer for heat sealing the lid 1 to the opening 3 of the cup container 2 is provided with a thickness of 15 to 100 μm. The heat seal layer is, for example, linear low density polyethylene (LLDPE), low density polyethylene (LDPE), high density polyethylene (HDPE), unstretched polypropylene (CPP), ethylene / vinyl acetate copolymer (EVA), ethylene / Hot melt adhesives made of resinous films such as acrylic acid copolymer (EAA), ethylene / methacrylic acid copolymer (EMAA), ethylene / vinyl acetate copolymer resin, ethylene / acrylic acid copolymer resin, etc. It can be formed by coating.

  As shown in FIG. 2, the first sheet 7 includes a part 11 a of the outer peripheral edge and another part 11 b separated from the part 11 a, and extends in a first region 11 ( A portion with a right-up hatching), a second region 12 (a portion with a right-down hatching with a narrow interval) separated by the first region 11, and a third region 13 (a right-down hatching with a wide interval). Attached portion).

  A boundary line 16 between the first region 11 and the second region 12 is a curved line convex toward the third region 13, and a boundary line 17 between the first region 11 and the third region 12 is a straight line. On the boundary line 16 between the first region 11 and the second region 12, as shown in FIG. 3, a half cut 10 extending from the first sheet 7 to the inside of the second sheet 8 is formed. Thus, the first region 11 and the second region 12 of the first sheet 7 are cut.

  On the other hand, the second sheet 8 is a sheet body made of a material that does not contain aluminum, and is formed of a single piece of paper or a resin film or a laminate of paper and a resin film, like the first sheet 7. As the material of the second sheet 8, the above-described paper or resin film can be used.

  The second sheet 8 is formed with a plurality of perforations 6 extending linearly on the boundary 17 between the first region 11 and the third region 13 of the first sheet 7. The perforation 6 may be formed so as to penetrate all layers of the second sheet 8, or may be formed only in a part of the layers constituting the second sheet 8. In the latter case, for example, if the perforation is formed only in the intermediate layer of the second sheet 8 and the perforation is not provided in the layer provided on the upper layer, the appearance becomes clean and the lid body The sealing property of 1 is also improved.

  Here, the adhesion state between the first sheet 7 and the second sheet 8 will be described.

  The first region 11 of the first sheet 7 and the second sheet 8 are bonded to each other through a release layer 14 made of a peelable material such as a wax-based release varnish so as to be peelable at the boundary surface. . The release layer 14 may be formed on the entire first region 11 or may be formed partially, for example, like a dot pattern or a stripe pattern.

  On the other hand, the second region 12 and the third region 13 of the first sheet 7 are integrated with the second sheet 8 via an adhesive. Further, the adhesive strength between the third region 13 of the first sheet 7 and the second sheet 8 is at least greater than the adhesive strength between the first region 11 of the first sheet 7 and the second sheet 8. Is set.

  When the lid 1 is sealed to the cup container 2, a part of the second region 12 and a part of the third region 13 facing the second region 12 protrude outwardly from the opening 3 in the form of a flange so that the lid 1 is opened. The tab 4 (second region 12 side) and the fully open tab 5 (third region 13 side) can be formed in a shape and size. The opening tab 4 and the fully opening tab 5 are provided to make it easy to grasp the lid 1 when opening the packaging container.

  FIG. 4 is a perspective view showing a usage state of the packaging container using the lid according to the embodiment of the present invention, and FIG. 5 is a top view of the packaging container shown in FIG. FIG. 6 is a cross-sectional view taken along the line BB ′ shown in FIG.

  When opening the lid body 1 (the state shown in FIGS. 1 and 3) sealed in the opening 3 of the cup container 2, the second tab 12 is moved from the second region 12 of the first sheet 7 while grasping and lifting the opening tab 4. 3. Move in the direction toward the region 13 (the right direction in FIGS. 1 and 3). Since the second region 12 of the first sheet 7 and the second sheet 8 are bonded with an adhesive, the second sheet 8 and the second region 12 of the first sheet 7 Are integrally peeled from the opening 3 of the cup container 2.

  When the unsealing tab 4 is further moved to the fully opened tab 5 side, the peeling of the seal portion between the first sheet 7 and the opening 3 further proceeds along the opening 3, and as shown by the broken line in FIG. Reach up to position 10. As described above, the first region 11 and the second region 12 of the first sheet 7 are cut by the half-cut 10, and the first region 11 and the second sheet 8 of the first sheet 7 are separated from each other. Layer 14 is interposed. Therefore, when the opening tab 4 is further moved to the fully opened tab 5 side, the second sheet 8 is peeled from the first region 11 of the first sheet 7 as shown in FIGS. The region 11 remains in the cup container 2 while being sealed in the opening 3.

  In addition, since the 3rd area | region 13 of the 1st sheet | seat 7 and the 2nd sheet | seat 8 are adhere | attached with the adhesive agent, peeling of the 2nd sheet | seat 8 from the 1st sheet | seat formed the perforation 6. Stop near the boundary between the first region 11 and the third region 13.

  As described above, when the lid 1 is opened from the opening tab 4 side (second region 12 side) toward the fully opened tab 5 side (third region 13 side), the first sheet and the second sheet in the first region 11 are opened. And a part of the lid body 1 separated from the opening 3 is connected to the cup container 2 only through the second sheet 8 at the boundary between the first region 11 and the third region 13. It becomes. In this state, a part of the lid 1 separated from the opening 3 can be bent at the connection portion of only the second sheet 8, but the repulsive force of the connection portion is the first sheet 7 and the second sheet 8. It is relatively small compared with the laminated body. Therefore, when the lid 1 is opened halfway, the connecting portion between the lid 1 and the cup container 2 can be easily bent, and once the connecting portion is bent, the repulsive force of the second sheet 2 is resisted. Thus, it is easy to keep the lid 1 open.

  In addition, in applications such as foods such as instant noodles in which hot water is put in the cup container 2 and steamed and cooked, it is necessary to close the opened lid 1 again. If the weight of the opened portion is adjusted by weighing the sheet 7 and the second sheet 8, etc., the resealability can be improved by the dead weight of the lid 1.

  In addition, after steaming cooking, it moves to the direction (left direction in FIG. 1 and 3) which goes to the 2nd area | region 12 from the 3rd area | region 13 of the 1st sheet | seat 7, grasping and pulling up the fully open tab 5. FIG. Since the third region 13 of the first sheet 7 and the second sheet 8 are bonded by an adhesive, the first sheet 7 and the second sheet 8 are integrally peeled from the opening 3 by this opening operation. The lid 1 can be completely removed from the cup container 2.

  As described above, the first sheet 7 sealed in the opening 3 of the cup container 2 has the second region bonded to the upper second sheet 8 in order from the opening tab 4 side to the fully opened tab 5 side. 12, a first region 11 that is separated from the second region 12 and is detachably bonded to the second sheet 8 via the release layer 14, and a third region 13 that is bonded to the second sheet 8 is provided. ing. When the lid 1 is opened from the opening tab 4 side toward the fully opened tab 5 side in use, the first sheet 7 and the second sheet 8 are peeled off in the first region 11 as the second sheet 8 moves. Then, peeling stops at the boundary line portion between the first region 11 and the third region 13. As a result, since the repulsive force at the boundary line portion between the first region 11 and the third region 13 can be reduced, the dead hold property of the lid 1 can be improved without using an aluminum foil.

  In the present embodiment, the second sheet 8 is formed with perforations 6 extending on the boundary line between the first region 11 and the third region 13. Since the repelling force of the second sheet 8 can be further reduced by the perforation 6, the second sheet 8 can be bent more easily and the dead hold property can be further improved.

  Furthermore, in the present embodiment, the boundary line (half cut 10) between the first region 11 and the second region 12 of the first sheet 7 is configured by a curved line convex toward the third region 13 side. When the half cut 10 is formed in this way, a portion of the first region 11 held in the opening 3 is peeled first, and then peeling proceeds along the half cut 10. Therefore, the first sheet 7 and the second sheet 8 can be easily peeled when opened, and the easy-to-use lid 1 can be configured.

  Further, when the boundary line between the first region 11 and the second region 12 of the first sheet 7 is cut by the half cut 10, the first region 11 and the second region are simultaneously or continuously with the punching of the lid body 1 with a mold. Since the boundary with 12 can be cut, the lid 1 can be manufactured efficiently.

  In the above embodiment, a plurality of perforations 6 are formed on the second sheet 8, but the number of perforations may be arbitrary. Further, the perforation 6 is not always necessary, and even when the second sheet 8 without the perforation 6 is used, the repulsive force is reduced by partial peeling of the lid 1 as in the above embodiment. In addition, the dead hold property can be improved.

  In the above-described embodiment, the example in which the third region 13 of the first sheet 7 and the second sheet 8 are completely bonded by the adhesive has been described. However, the third region 13 of the first sheet 7 and the second region 8 The adhesive strength between the two sheets 8 may be set larger than the adhesive strength between the second region 12 of the first sheet 7 and the second sheet 12. If the magnitude relationship of the adhesive strength is set in this way, a difference occurs in the peelability between the first sheet 7 and the second sheet 8, so the first sheet 7 and the second sheet 8 when the lid body 1 is opened. The progress of the peeling between the first region 11 and the third region 13 can be suppressed to some extent near the boundary.

  Furthermore, in the above embodiment, the region where the release layer 14 is provided and the first region 11 coincide with each other, but if the first sheet 7 and the second sheet 8 can be peeled at least in the first region 11, A release layer 14 may be provided so as to protrude from the first region 11.

  Furthermore, in the above embodiment, the outer shape of the lid body 1 is substantially circular, but it goes without saying that the lid body 1 may be other than a circle.

  Furthermore, in the above embodiment, the boundary line 16 (FIG. 2) between the first region 11 and the second region 12 is a curved curve convex toward the third region 13, but the first sheet 7 and the second sheet 8 at the time of opening. The boundary line 16 may have other shapes as long as separation between the two is possible.

  Further, in the above-described embodiment, the half cut 10 extending from the first sheet 7 to the inside of the second sheet 8 is formed at the boundary line 16 (FIG. 2) between the first region 11 and the second region 12. However, this configuration is not necessarily required, and it is sufficient that the first region 11 and the second region 12 are cut.

  Examples in which the present invention is specifically implemented will be described below. The following embodiment corresponds to the configuration shown in FIG.

  One side of a PET film (thickness 12 μm) subjected to discharge treatment on both sides was subjected to light-shielding printing (urethane-based ink, three-color printing by Smith Smith), and LDPE was extrusion-molded thereon (thickness 15 μm). An adhesive easy peel layer (thickness: 45 μm) made of polyethylene was formed on the other surface of the PET film. The laminated sheet thus formed was used as the first sheet.

One side of a piece of art paper (weighing 104.7 g / cm ² ) was printed with a pattern ink (nitrified cotton + urethane system), and a PET film (thickness 12 μm) was laminated thereon. A sealing varnish (nitrified cotton + urethane system) was applied to the other side of one piece of art paper. The laminated sheet thus formed was used as the second sheet. In addition, three perforations (perforation width 3 mm, tether 1 mm) were formed at a 1 mm interval at a predetermined position (perforation 6 forming position in FIG. 1) of the piece of art paper.

  The first sheet and the second sheet are bonded to each other by interposing a wax-based release varnish in a portion corresponding to the first region of the first sheet, and the bonded laminated sheet is punched out by a mold, and the diameter is 104 mm. A lid was formed. A half cut reaching the inside of the piece of art paper of the second sheet was formed on the first sheet together with the punching process.

  The lid formed in this way was heat-sealed in a cup container whose flange portion of the opening was covered with polyethylene to obtain a sample of a packaging container.

  When the opening operation shown in FIGS. 4 to 6 was performed using the obtained packaging container, the first sheet and the second sheet were easily separated at the portion sandwiched between the half cut and the perforation, and the peelability was It was good. In addition, if only the upper second sheet is bent at the perforation, the repulsive force due to the perforation is reduced, and the lid is kept open by its own weight separated from the cup container. It was confirmed that it has a good dead hold property. Further, since the stiffness of the piece of art paper is reduced by the perforation, a part of the lid can be freely opened and closed around the perforation part, and the resealability is also good.

  Furthermore, when the lid was peeled from the side opposite to the opened state (the fully opened tab side), the cup container could be fully opened without breaking the lid part. Since the lid according to this example does not contain aluminum, the internal inspection of the packaging container by the metal detector could be performed without any problem.

  INDUSTRIAL APPLICABILITY The present invention can be used for a cup container lid used for food packaging containers and the like.

DESCRIPTION OF SYMBOLS 1 Cover body 2 Cup container 3 Opening part 6 Perforation 7 1st sheet 8 2nd sheet 9 Half cut 11 1st area | region 12 2nd area | region 13 3rd area | region 14 Peeling layer

Claims (3)

A lid for sealing the opening of the cup container,
A first sheet formed of one or both of paper and a resin film, one surface of which is sealed in the opening;
A second sheet formed from one or both of paper and a resin film and adhered to the other surface of the first sheet;
The first sheet has a band-shaped first region including a part of an outer peripheral edge and another part, and a second region and a third region separated by the first region,
The first region and the second region are cut;
The first region of the first sheet and the second sheet are detachably bonded at the interface,
The adhesive strength between the third region of the first sheet and the second sheet is higher than the adhesive strength between the first region of the first sheet and the second sheet,
The first region of the first sheet and the second sheet are attached via a release layer,
The second and third regions of the first sheet and the second sheet are bonded through an adhesive,
The boundary line between the first region and the third region is a straight line,
A layer provided on an upper layer of the partial layer, in which a straight perforation extending along a boundary line of the first region and the third region is formed only in a partial layer constituting the second sheet. Has no perforations,
A part of the second region is configured to protrude outward, and the opening tab that peels and opens the second region of the first sheet and the second sheet integrally from the opening of the cup container; A part of the third region protrudes outward, and the first region of the first sheet, the third region, and the second sheet are peeled and removed integrally from the opening of the cup container. A lid having a tab.   2. The lid according to claim 1, wherein the first region and the second region are cut by a half cut reaching from the one surface of the first sheet to the inside of the second sheet. body.   3. The lid according to claim 1, wherein a boundary line between the first region and the second region is a curved line that protrudes toward the third region.

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