JP5964539B2 - Lid and container using the lid - Google Patents

Description

  The present invention is a lid material suitable for sealing and sealing an upper end portion or a flange portion of a container body having a storage portion and having an opening portion at an upper end and a flange portion formed at an end portion of the opening portion or a peripheral edge of the opening portion. In particular, the present invention relates to a lid that does not contain aluminum foil, and a container that uses the lid, which is used in a food container in which instant noodles and the like are stored in a storage portion, hot water is poured, cooking, and eating and drinking.

  Conventionally, a base material mainly made of plastic film or paper that seals the upper end or flange of a container body having an opening at the upper end and a flange formed at the end of the opening or the periphery of the opening with a seal or the like. An aluminum foil and a sealant layer laminated on the lower side are used as a cover material. The lid is sealed by a flange formed at the end of the opening at the upper end of the container or at the periphery of the opening, and the lid is opened by using a tab for opening formed at the periphery of the lid. Lift and peel off the lid so that it peels off the container. In particular, in the case of food containers containing instant noodles etc., the lid material with the above-described aluminum foil intervening can be maintained in a state where it is peeled off (dead) when it is peeled off to substantially the center of the lid material. Holdability).

  For example, in the case of instant noodles that return to a state where they can be eaten with hot water, the lid material having the dead hold property is peeled off from the container main body, and the lid material is left in a half-open state. If you can pour hot water easily and then re-seal the lid in a half-open state once to warm and loosen the noodles, the lid will also have a resealability that can be returned to its original state, for opening It can be configured to have a property of flattening without curling when the tab is wrapped around the end or flange of the container body, or when the lid is returned from the half-open state to the resealed state. .

  However, when metal foil such as aluminum foil is used in the composition of the lid, it is difficult to ensure safety because it cannot be inspected using a metal detector that inspects for contamination of metallic foreign matter. In addition, there are environmental problems because the waste disposal conditions vary depending on the region, such as when incineration is not possible due to environmental concerns or when sorting for disposal is persistent.

  Therefore, as a matter of consideration for the environment, a cover material mainly composed of a paper base material or a plastic film has been studied as a base material without using an aluminum foil. Since such a lid material easily curls when peeled, if the lid material is opened in a half-open state and then returned to its original flat state for resealing, the lid material becomes curled (warped). Also, even if you try to stop the opening tab around the end or flange of the container body, the winding force is weak and it immediately returns to the curled state, so the edge of the container body is attached to the opening tab of the lid to be resealed. Folding hooks to be hooked (Patent Documents 1 and 2), and other than the opening tab, a folding piece to be wound around the end or flange of the container body is provided and fixed by hooking (Patent Documents 3 and 4) Also, it is hard to become a curled state by providing a lid locking portion on a part of the flange of the container body (Patent Document 5) or by providing one or more cut lines such as half cuts on the lid. That technique (Patent Document 6, 7, 8, 9) have been proposed.

JP 2004-168404 A JP 2005-289391 A Japanese Patent Laid-Open No. 10-316168 Japanese Patent Laid-Open No. 2001-180737 JP 2004-161312 A Japanese Patent Laid-Open No. 2001-10657 JP 2002-46763 A JP 2003-276774 A Japanese Patent Laid-Open No. 2004-345661 JP 2002-37311 A

  However, when the folding tab is formed on the edge of the container body in the opening tabs of Patent Documents 1 and 2, it is difficult to stop the hook on the edge of the container body because the curled lid material is warped. It has been necessary to change the shape of the container, such as making a cut or forming a bite. Further, in addition to the unsealing tabs of Patent Documents 3 and 4, fixing by folding pieces or the like also causes strong warping of the lid material, and the lid material often cannot be fixed. Furthermore, since the lid | cover material latching | locking part for lid | cover materials formed in the container of patent document 5 has the specific shape of a container, positioning with a lid | cover material is needed. Next, in Patent Documents 6, 7, 8, and 9, the cover material is cut and the like, and in Patent Document 10, a part of the cover material is peeled off so that it can be easily bent and returned to the original state. However, since the action of the former differs depending on the depth and number of cuts, it is difficult to make the lid material easy and reliable, and there is anxiety due to the cuts in the lid material. Yes, the latter is difficult to design and look because the cuts of the part to be peeled are exposed on the surface. In particular, Patent Document 1-5 forces the user to perform complicated operations, and Patent Document 6-9 manufactures a lid material that reliably exhibits dead hold and resealability. Higher management is needed.

  In particular, in the case of a lid using a laminated material composed of a paper layer excluding an aluminum foil, a sealant layer, etc., the lid is easily closed without dead hold property, and it is difficult to pour hot water, There is a risk of burns due to hot water splashing on the closed lid material and spilling around it. Also, when resealing the lid material peeled off half-open after pouring hot water, the lid curls with hot water etc. There was a problem that it was difficult to reseal.

  Therefore, the present invention solves the above-described problems of the prior art, and the problem is that there is no concern about environmental problems when disposing of used containers, and metal detection as a countermeasure against contamination of products. In order to enable inspection of products by a machine, it is a laminated body having a structure that does not use aluminum foil, and a lid for an instant food container that has a sufficiently opened state (dead hold property) and resealability and its lid A container using a material is provided.

The present invention, which has been made to solve the above problems,
A lid that is adhesively sealed with a flange formed around the opening of the container body, and is peeled off from the container body when opened,
The lid member is formed by laminating an upper sheet having a plastic film and an upper substrate, a thermoplastic film, a lower substrate and a lower sheet having a sealant layer,
An opening tab for opening the outer periphery of the lid member and a peeling tab for peeling a part of the lid member;
Between the upper sheet and the lower sheet, a strip-shaped release layer that divides into a peeled part and a non-peeled part toward the opposite ends of the peeling tab,
The upper sheet has a release region corresponding to the release layer portion connected to the release tab and a cutting line engraved with a cut dividing an adhesive region other than the release region,
In the vicinity of the peeling tab, two notches for starting peeling are provided facing each other, and a notch line is formed on the back surface of the lower sheet that connects the notches and intersects the cutting line,
The notch is a lid material having a divergent shape as seen from the peeling direction,
While pulling off the peeling tab, the upper sheet is peeled and removed along the cutting line, and when the opening tab is lifted and the lid material is partially peeled open, the lid material is It can be held in a bent state ,
The plastic film has a straight-cut property, and the easy-cutting direction is substantially matched with the peeling direction of the peeling tab,
The cutting line is formed by cutting only the upper substrate, the plastic film is not cut, the cutting line is not exposed to the outside,
In addition, the cutting line is formed of a row having a plurality of continuous cuts, and a plurality of rows are formed on both sides of the boundary between the peeling region and the bonding region, and the notch is formed of a plurality of rows of the cutting line. It is a lid | cover material arrange | positioned in the area | region .

  As a result, when the tab for peeling the upper sheet of the lid is lifted and pulled in the opposite direction, the upper sheet is peeled off because the portion corresponding to the strip-shaped peeling layer of the upper sheet peels from the lower sheet along the cutting line. Since the lower part is a thin film of a lower sheet consisting of a thermoplastic film, lower base material, sealant layer, etc., the opening tab is then pulled, and the lid is peeled off to the part where the upper sheet is peeled off When the peeled lid is folded, the peeled portion can be maintained in a folded state. When the part is returned to its original position, there is no rigid layer that warps the shape of the part, so the lid does not curl, the lid is easy to return to a flat state, and the container is opened. It can be capped part is one that exhibits a resealing properties sufficient open state (dead hold property).

Moreover, the plastics can be reduced from the waste because the upper base material is a single paper base material.

In addition, by making the easy-cut direction of the plastic film having the straight cut property substantially coincide with the peel direction of the peeling tab, the plastic film having the straight cut property can be easily cut and peeled off along with the cutting of the upper substrate.
In addition, since the cutting line formed in an upper sheet is under the plastic film which has a straight cut property, a cutting line is not exposed outside.

  Further, by providing a light shielding layer between the thermoplastic film and the lower base material, it is possible to prevent irradiation of sunlight, the room, and the like from the outside of the lid member.

  In addition, by having a light-shielding layer on one or both of the upper sheet and the lower sheet, foodstuffs such as instant noodles stored in the container body sealed with the lid material deteriorate due to gas components such as oxygen and water vapor. Can be prevented.

  Moreover, the cutting line of the cover material is formed of a row having a plurality of continuous cuts, and a plurality of rows of cuts are formed by carving a plurality of rows on both sides of the boundary between the peeling region and the bonding region. This facilitates cutting of the upper substrate.

  In addition, by cutting the cutting line only in the upper base material, no cut is made in the plastic film having a linear cut property, so that the strength of the film is not lowered and the barrier property is improved.

  The peeling tab is peeled off by the cut line by providing a notch for starting peeling in the vicinity of the peeling tab at two locations facing each other, and providing a cut line connecting the notches and intersecting the cutting line on the back surface of the lower sheet. It becomes easy to peel, and it can be made easy to peel by guiding to the cutting line from the notches on both sides of the peeling tab.

  When the notch has a divergent shape (reverse C shape) when viewed from the peeling direction, the peeling tab can be easily pinched.

  In addition, by providing the release layer on the back side from the center when viewed from the opening tab, the peeled portion is located away from the opening tab. Since it can be widened and overlaps with the lid material surface of the non-peeled portion by its own weight, the dead hold property is high.

  Further, the peeling tab and the opening tab may be provided at an angle of approximately 90 ° or more from the center of the lid member.

  Furthermore, the container according to the present invention is a container formed by sealing the lid of the container main body having an opening on the upper part of the opening or the flange formed on the periphery of the opening, and the storage stability of the contents And when it eats, it has sufficient open state (dead hold property) and resealability so that a cover material may return to a flat state easily.

  According to the present invention, it can be used for containers made of various plastics and papers, and as a lid for instant food containers having a sufficiently opened state (dead hold property) and resealability, when pouring hot water While being able to make sufficient opening, it can pour hot water in comfort by setting it as a half-opened opened state. In addition, when the bent portion is returned to the original state in order to reseal the lid member in the half-open state, the lid member returns to a flat state, and thus it is not necessary to press the lid member. Further, since the metal foil such as aluminum foil is not included in the lid material structure, it can be applied to a metal detector used for foreign matter contamination inspection, and safety can be ensured.

It is a perspective view of the container using the lid | cover material of this invention. (A) is a front view which shows an example of the cover material of this invention before peeling, (b) is a front view which shows an example of the cover material of this invention after peeling. It is sectional drawing in the AA of FIG. It is sectional drawing in the BB line of FIG. It is sectional drawing in the CC line of FIG. It is a perspective view which shows an example of the peeling state before opening of the cover material in the container using the cover material of this invention. It is sectional drawing of the container which shows the dead hold property in the opened state of the cover material of this invention. It is sectional drawing of the container which shows the resealability in the reseal state of the lid | cover material of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The present invention provides a lid member (5) for sealing with a seal to a flange portion (4) formed at the upper end of the opening (3) of the container body (2) or the periphery of the opening shown in the perspective view of FIG. Yes, the lid (5) seals and seals the opening (3) of the container body (2) to form the container (1). In particular, it is used as a lid for instant food containers. The container body (2) has a polyethylene resin layer on the inside, especially the flange (4).

  As shown in FIG. 2 (a), an opening tab (6) for opening on the outer peripheral edge of the lid member (5) and a peeling tab (7) for peeling a part of the lid member (5). There is. The position of the opening tab (6) and the peeling tab (7) can be provided so as to have an angle in the range of 45 ° to 135 °. However, considering the ease of opening, approximately 90 ° is preferable. .

  The peeling tab (7) is provided on the opposite side of the center of the opening tab (6), and the peeling tab (7) is a cutting line (9) engraved on the upper sheet (10). ) To peel off the upper sheet (10) of the peeled portion, and the opening tab (6) is for peeling and opening the lid (5) from the flange portion (4) of the container. .

  There is a notch (8) provided in the vicinity of the peeling tab (7), and a cutting line (9) consisting of a cut cut in the lid (5), and the peeling tab (7) is lifted up in the opposite direction. As shown in FIG. 2B, a part of the lid member (5) is peeled along the cutting line (9). Thereby, a cover material (5) becomes easy to bend | fold from the part which peeled.

  As shown in FIG. 3, which is a cross-sectional view taken along line AA of FIG. 2 (a), this lid member (5) is a laminate that does not use a conventional aluminum foil, and includes a plastic film (11) and an upper substrate. A laminated body in which an upper sheet (10) having (12) and a lower sheet (16) having a thermoplastic film (13), a lower substrate (14) and a sealant layer (15) are laminated, The sealant layer (15) of the material (5) and the flange portion (4) of the container main body (2) are sealed by heat sealing or the like and sealed.

  Between the upper sheet (10) and the lower sheet (16), there is a strip-shaped release layer (17) that is divided into a peeled portion and a non-peeled portion toward the opposite end of the peeling tab (6), The cut | disconnection which engraved the cut part (20) of the half cut which divides | segments into the adhesion | attachment area | region (19) other than a peeling area | region (18) and peeling area corresponding to a peeling layer (19) part on the back surface side of an upper sheet | seat (10). With line (9).

In FIG. 3, the cut line (9) is provided with a cut (20) without penetrating the upper sheet (10), and the cut line (9) may not be provided on the plastic film (11). For example, in the case of using a plastic film having a linear cut property such as a uniaxially stretched film (uniaxially stretched polypropylene, uniaxially stretched high density polyethylene, or the like), the cutting line may not be provided. Unless a cut is made in a plastic film having a straight cut property, the strength of the film is not lowered, the barrier property is improved, and the cutting line is not exposed to the outside, so that the design is excellent.
Moreover, if the peeling layer (17) is formed wider than the width between the two cutting lines (9), the peeling portion is easy to peel off.

The lid member (5) is partitioned into a release region (18) of the release layer (17) formed by application of a release agent and an adhesive region (19) other than the release layer (17), and the upper sheet on the upper side (10) and the lower lower sheet (16) are laminated and bonded, and the back surface of the upper sheet (10) has a half in the vicinity of the boundary line between the peeling region (18) and the bonding region (19). A plurality of cut lines (9) in which a plurality of cut lines (20) are cut are formed (three rows in FIG. 2).
The cut (20) by the half cut of the lid material (5) may or may not penetrate the upper base material (12), and the upper sheet (10) can be reliably cut by the cutting line (9). Just do it.

  The cutting line (9) of the present invention does not define the number thereof, but does not deviate from the cutting line (9) and the other parts of the upper sheet (10) are not torn and are linear. Multiple rows are preferable as long as they can be easily cut. The cut line (9) has a "perforation", a "C-shaped cut" in which a number of C-shaped lines continue in the peeling direction as viewed from the peeling tab (7) side, and a short diagonal line in the peeling direction. It is also possible to make a “no-character break” or similar cut. Moreover, it is good also as a continuous straight line.

  Further, as shown in FIGS. 2 (a), 4 and 5, two notches (8) for initiating peeling are provided on both sides in the vicinity of the base of the peeling tab (7), connecting these notches, and By providing on the back surface of the lower sheet (16) a cut line (21) (shown by a dotted line in FIG. 5) that intersects the cut line (9) vertically, along the notch (8) from the peeling tab (7). Delamination can be induced to the cutting line (9).

The notch (8) is preferably formed in an “inverted square shape” extending in the outer peripheral direction of the peeling tab (7). That is, when the peeling tab (7) is viewed from the peeling direction, it becomes easier to pinch by making it a “end-spread” shape or a “trumpet” shape, and the notch when the peeling tab (7) is pinched and pulled in the peeling direction Cutting at the cutting line (9) from (8) becomes easy. In addition, by providing the cut line (21), the peeling tab (7) is easier to pinch and can easily be peeled to the cutting line (9).
Thereafter, the cutting proceeds along the cutting line (9), the peeling region (18) of the upper sheet (10) is peeled from the peeling layer (17), and the concave portion (24) is formed.
The cut line (21) may be a half cut from the lower sheet (16) to the middle of the upper substrate (12) of the upper sheet (10).

  Moreover, in this invention, as shown in FIG. 3 thru | or FIG. 5, the upper sheet | seat (10) which has a plastic film (11), a printing layer (22), and an upper base material (12), and a thermoplastic film (13) And a lower sheet (16) having a light shielding layer (23), a lower substrate (14) and a sealant layer (15).

The upper base material (12) may be a paper base material or a thermoplastic film, and may retain a light shielding function such as a gas barrier layer (not shown) or a light shielding material added to the upper base material (12) as necessary. it can. Similarly, the lower substrate (14) may be a paper substrate or a thermoplastic film. The thermoplastic film (13) is provided with adhesiveness to the upper sheet (10), and is formed by extrusion, for example. It is a polyethylene layer.
In addition, when accommodating the content which does not require light shielding, the structure without a light shielding layer (23) may be sufficient.

  Further, the lower substrate (14) may be provided with a gas barrier property, and a metal vapor deposition layer such as aluminum or an inorganic metal oxide vapor deposition layer such as silicon oxide, aluminum oxide or magnesium oxide is used as a thermoplastic resin film such as polyethylene terephthalate. Further, a vapor deposition layer may be formed by a forming means such as a vacuum vapor deposition method or a sputtering method.

Furthermore, an overcoat layer made of a compound containing the following (A) and (B) can be laminated on the above-mentioned vapor-deposited layer to improve the gas barrier property.
(A): Water-soluble polymer.
(B): a silane monomer represented by the general formula R—Si (OR ′) 3 or a hydrolyzate thereof, one or more metal alkoxides represented by the general formula M (OR ′) n or a hydrolyzate thereof, Silane coupling agent or hydrolyzate thereof, or a mixture thereof [wherein R is a functional group selected from an alkyl group, a (meth) acryloyl group, a vinyl group, an amino group, an epoxy group, and an isocyanate group, and R ′ is An alkyl group, M is a metal ion, and n is the valence of the ion. ].

  As described above, as shown in FIG. 6, the opening of the container (1) using the lid material (5) of the present invention is performed by pinching the peeling tab (7) at the tip and via the notch (8). 7) The peeling tab (7) is bent upward from the cut line (21) applied to the base of the back surface of the back surface, and then pulled in the direction of the arrow, so that the cutting line (9) is continuously connected to the cut line (21). A part of the upper sheet (10) in the peeling region is peeled off along with the peeling tab (7) by peeling the peeling portion of the upper sheet (10) from the peeling layer (17) in the peeling region in a strip shape. As shown in FIG. 7, the portion becomes only a thin lower sheet (16), and a recess (24) is formed.

  Next, as shown in FIG. 7, the upper sheet (10) is peeled from the flange (4) of the container (1) while pulling up the opening tab (6) as shown by the arrow. In the half-open state, the peeled lid member (5), that is, the concave portion (24) of only the lower sheet (16), can be easily folded, and the concave portion is formed by the weight of the peeled lid member (5). The state of being bent at (24) can be maintained, and the dead hold property is excellent.

Further, when the lid (5) opened in the half-opened state shown in FIG. 8 is returned to the original flat state shown in FIG. 7 as indicated by the arrow, the concave sheet (24) has no upper sheet (10). Therefore, there is no warp such as curling due to hot water, and the flat state is obtained, and the resealability that can maintain this flat state is excellent.
Thus, as a lid for instant food containers, hot water can be poured into the container from the opening easily and safely in a folded state, and the flat state can be maintained, so that the noodles and the like can be warmed and loosened. In addition, it is not necessary to place a weight or the like on the lid material so that the lid material does not warp or to newly provide means for fastening the lid material to the container.

As the upper sheet (10) constituting the lid member (5) of the present invention, the plastic film (11) is a polyethylene terephthalate resin, and the thickness is preferably 6 to 16 μm. Upper substrate (12) is paper, preferably has a multicolor printability at least the surface is a white, basis weight 50g / m ² ~150g / m ² about both art paper, migraine art paper or double-sided coated Paper, single-sided coated paper, synthetic paper, and the like can be used.

  A sealing varnish layer can be used on the lower sheet (16) side of the upper substrate (12). Sealing varnishes include (urethane resin, nitrified cotton (cellulose) resin, blended resin of nitrified cotton (cellulose) and urethane resin, etc., and these resins include polyethylene, polyester, fatty acid amide, etc. There is added 5% or more of wax, preferably a blended resin of nitrified cotton (cellulose) and urethane resin, and the coating thickness is preferably 0.2 to 20 μm.

  Further, as the sealant layer (15) constituting the lower sheet (16), linear low density polyethylene (LLDPE), low density polyethylene (LDPE), high density polyethylene (HDPE), unstretched polypropylene (excellent in heat sealability) ( CPP) or other polyolefin resin or ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA) or the like is used. be able to. Further, these polyolefin resins may be mixed with a component incompatible with a polyolefin resin made of polystyrene, polybutene or the like. Moreover, the hot melt adhesive which consists of ethylene-vinyl acetate copolymer resin, ethylene-acrylic acid copolymer resin, etc. can be provided in the range of 20-100 micrometers in thickness. Thereby, these sealant layers (15) have sufficient hermetic sealability, peelability and openability with the flange portion (4) of the container body (2).

  As the lower substrate (14), a polyethylene terephthalate (PET) film having a thickness of 6 to 16 μm, a biaxially stretched polyethylene (0PE) film having a thickness of 15 to 25 μm, a biaxially stretched nylon (ONy) film, a thickness of 10 to A 25 μm biaxially stretched polypropylene (OPP) film or the like, preferably a relatively thin film having no waist, can be selected as appropriate.

  As the thermoplastic film layer (13), heat-fused low density polyethylene (LDPE), linear low density polyethylene (LLDPE), low density polyethylene (LDPE) and ethylene-methacrylic acid copolymer resin (EMAA) are mixed. Resins and the like can be mentioned, and these can be extruded to a thickness of 5 to 20 μm and formed by lamination.

  The light-shielding layer (23) provided as necessary can be a three-color printing of urethane-based ink / white / sumi ink, and carbon-containing ink can also be used. Further, the lower base (14) and For the purpose of adhering to the thermoplastic film (13), a mixture of an ethylene-methacrylic acid copolymer resin (EMAA) or an anchor coat agent such as urethane can be used. Can be formed.

  Examples of the release layer (17) include polyethylene wax, polyester wax, fatty acid amide wax, or a mixture thereof. These can be obtained by partially applying a mesh pattern (or a dot pattern pattern, a checkered pattern pattern, or a grain pattern pattern) as a peeling varnish by a known coating method such as a gravure method or a screen method.

In addition, when the release layer (17) is formed on the sealing varnish layer, it is possible to prevent the release layer from penetrating the release agent (when the release agent penetrates, the role of the adhesive does not increase and the adhesive strength increases). As a result, the peelability is improved.
The print layer (22) has a design of desired characters, designs, etc. formed by a known gravure printing method, offset printing method, flexographic printing method, etc. using commonly used printing ink for paper. The

The plastic film (11) is a polyethylene terephthalate resin, 12 μm thick emblet PC (trade name, manufactured by Unitika Co., Ltd.) is laminated, and the upper substrate (12) has a basis weight of 104 with a pattern or the like printed on the surface. A piece of 0.7 g / m ² of art paper was used, and on the reverse side, a mixture of nitrified cotton and urethane resin was formed as a sealing varnish. Further, the release layer (17) was formed by applying and drying a release agent made of polyethylene wax on a strip-like release region having a width of 20 mm (preferably, 2 mm from the outer edge of the sewing machine) to obtain an upper sheet (10). .

  The lower substrate (12) is a 12 μm thick polyethylene terephthalate (PET) film laminated by extruding a 45 μm thick low density polyethylene (LDPE) film, and the other side of the urethane ink sumi / shiro / sumi Laminate by extruding a low-density polyethylene (LDPE) melted between the light-shielding layer (23) for color printing and the release layer (17) of the upper sheet (10) as a thermoplastic film (13) having a thickness of 15 μm. As a result, a lower sheet (16) was obtained.

  In the separation area on the back side of the upper sheet (10) obtained above, three rows of “C-shaped cuts” (9) (in the case of “C” perforations, “C” 2 groups with 3 rows, width 5 mm, center 11 mm (perforation inner end to inner end 6 mm), and the separation between them was peeled off, and the peeling varnish was 20 mm wide (outer end of perforation) To 2 mm outside), coated with a solid), and a stripping tab (7) on the outer peripheral edge in the direction of the strip-shaped peeling region, and a tab for opening on the peripheral edge in the direction of the strip-shaped peeling region (approximately 90 °) 6) and a cover material (5) having a diameter of 100 mm, in which the lower sheet (16) was cut with a cut line (21) on the back surface of the peeling tab (7).

  This lid material (5) was heat-sealed and sealed on a flange portion of a paper cup container on which polyethylene was formed, to prepare a container (1).

  When this container (1) was inspected for the presence of metallic foreign objects using a metal detector, the inspection could be carried out without any trouble.

  As shown in FIG. 6, the cup container is opened by removing the lid (5) from the flange (4) of the cup container while pulling up the opening tab (6). When the sheet (10) peels well and peels to the peeling region (18), and the upper sheet (10) is bent at the recess (24) of the peeling region (18) removed from the cutting line, as shown in FIG. The state of being completely bent at about 180 ° can be maintained, and the state in which the lid (5) is returned to the original flat state as shown in FIG. 7 by pouring hot water into the container is maintained. I was able to. It was confirmed that the lid material (5) was excellent in both dead hold property and resealability.

  Moreover, when the cover material (5) was created using a gas barrier film (trade name “GL film” manufactured by Toppan Printing Co., Ltd.) instead of the polyethylene terephthalate (PET) film of the lower substrate (12), the oxygen permeability was determined. 5ml / m2 / day / MPa, water vapor permeability 0.6g / m2 / day, instant noodles stored in a container using this lid material have no abnormalities in quality even after 6 months storage and good storage stability It was confirmed that there was.

  In the same way as above, when the cutting line is three rows of “C-shaped cuts”, if the peel width is 2 mm, the cover material is cut and peeled at the innermost of the three rows of C-shape. However, if the peel width is set to 2 mm or less from the inner end to the perforated line, the dead hold property cannot be exhibited. If the peel width exceeds 2 mm, the dead hold property is exhibited. It is valid.

DESCRIPTION OF SYMBOLS 1 ... Container 2 ... Container main body 3 ... Opening part 4 ... Flange part 5 ... Cover material 6 ... Opening tab 7 ... Stripping tab 8 ... Notch 9 ... Cutting line 10 ... Upper sheet 11 ... Plastic film 12 ... Upper base material 13 ... Plastic film 14 ... Lower substrate 15 ... Sealant layer 16 ... Lower sheet 17 ... Release layer 18 ... Release area 19 ... Adhesion area 20 ... Cut line 21 ... Cut line 22 ... Print layer 23 ... Light shielding layer 24 ... Recess

Claims (7)

A lid that is adhesively sealed with a flange formed around the opening of the container body, and is peeled off from the container body when opened,
The lid member is formed by laminating an upper sheet having a plastic film and an upper substrate, a thermoplastic film, a lower substrate and a lower sheet having a sealant layer,
An opening tab for opening the outer periphery of the lid member and a peeling tab for peeling a part of the lid member;
Between the upper sheet and the lower sheet, a strip-shaped release layer that divides into a peeled part and a non-peeled part toward the opposite ends of the peeling tab,
The upper sheet has a release region corresponding to the release layer portion connected to the release tab and a cutting line engraved with a cut dividing an adhesive region other than the release region,
In the vicinity of the peeling tab, two notches for starting peeling are provided facing each other, and a notch line is formed on the back surface of the lower sheet that connects the notches and intersects the cutting line,
The notch is a lid material having a divergent shape as seen from the peeling direction,
While pulling off the peeling tab, the upper sheet is peeled and removed along the cutting line, and when the opening tab is lifted and the lid material is partially peeled open, the lid material is It can be held in a bent state,
The plastic film has a straight-cut property, and the easy-cutting direction is substantially matched with the peeling direction of the peeling tab,
The cutting line is formed by cutting only the upper substrate, the plastic film is not cut, the cutting line is not exposed to the outside ,
And the cutting line consists of a row having a plurality of continuous cuts, each of which is engraved with a plurality of rows on both sides of the boundary between the peeling region and the bonding region,
The lid material , wherein the notch is disposed in a region of the cutting line composed of a plurality of rows .   The lid material according to claim 1, wherein the upper base material is made of a single paper base material.   The lid member according to claim 1, wherein a light shielding layer is provided on one or both of the upper sheet and the lower sheet.   The lid material according to claim 1, wherein a barrier layer is provided between the thermoplastic film and the lower base material.   The lid according to claim 1, wherein the release layer is provided on the back side from the center as viewed from the opening tab.   The lid member according to claim 1, wherein the peeling tab and the opening tab are provided at an angle of approximately 90 ° from a center. The lid material according to any one of claims 1 to 6 is sealed to a flange portion formed at an upper end portion of the opening portion or a peripheral edge of the opening portion of a container body having an opening portion at an upper portion. A container characterized by.

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