JP2007001638A - Lid material with hot water drain hole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid material which is provided with an improved dead hold characteristic preventing the generation of a curl during storage and use and which makes it possible to use a metal detector for testing a product as it does not contain aluminum foil. <P>SOLUTION: This lid material comprises an outer lid made of a resin layer and a paper layer and an inner lid made of an extrusion resin layer, a plastic film layer and a heat adhesive resin layer. The outer lid and the inner lid are laminated separably at least partially through a separation layer, and when the outer lid is separated, the inner lid forms a hot water drain hole. As to the structure of the paper layer forming the lid material, a 10-25% additive is added, its pulp freeness is set to 450-550 cc and its water content is 3.5-5.5%. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a lid with a hot water hole that does not contain aluminum foil used for containers such as instant fried noodles, and a metal detector can be used for inspection of a product packaged using the lid, The present invention relates to a lid member with a hot water cut-out hole that can prevent the lid member from curling in a state of being punched into a shape and can maintain a shape obtained by partially peeling the lid member.

Conventionally, like lids of containers such as instant fried noodles, the lid is peeled off about half from the container to form an opening, hot water is poured into the container, steamed instant noodles, etc. The container lid is composed of an outer lid and an inner lid each having an opening knob projecting outward, and the inner lid has a hot water cut notch formed at a position facing the opening knob. Is a lid member having an outer lid cut portion that divides the outer lid into the opening knob part side in the vicinity of the hot water cut notch, and is located on the opposite side of the lid member from the opening knob part. An outwardly projecting hot water picking portion is formed, and an exfoliation incision that divides the inner lid into two parts is formed between the hot water pouring portion and the hot water cutting notch, and at least an exfoliation incision Whether the outer lid and the inner lid are laminated via the release layer in the area surrounded by the outer lid cut line Become hot cutting perforated lid (e.g., see Patent Document 1) is known.
JP 2000-203654 A

  However, in the lid material with a hot water cut hole, the outer lid is composed of a single paper layer or a plastic film layer and a paper layer, and the inner lid is composed of a polyethylene layer, an aluminum foil layer, and a heat-adhesive resin layer, and includes an aluminum foil. Therefore, the lid is plasticized by the aluminum foil, so even if curling occurs in the lid, it can be re-curled by hand to correct the curl, and the lid is supplied at the time of packaging. However, when the lid material with a hot water cut hole is replaced with a plastic film without using an aluminum foil layer, the lid is like a configuration including aluminum foil. Since plasticity is not given to the material, even if the paper layer expands and contracts and curls occur, it is difficult to correct the curl even if you try to re-set it by hand. It caused a drawback in that it does not allow to be supply of the lid smoothly. In the former case, when the inner lid is made of a structure in which the aluminum foil is replaced with a biaxially stretched plastic film, the lid has increased rigidity and repulsive force, and the lid has no dead-holding properties. Since the lid member thus returned returns to block the opening, there is a drawback that it becomes difficult to perform the operation of pouring hot water into the container from the opening formed by peeling off the lid member.

  The present invention can use a metal detector for inspecting a product packaged using a lid material, and can prevent curling from occurring in a lid material punched into a sheet during storage or use. Moreover, it is related with the cover material with a hot water cut hole which does not contain aluminum foil in the laminated structure which can hold | maintain the shape which peeled off the cover material partially.

  An outer lid made of a resin layer and a paper layer, and an inner lid made of an extruded resin layer, a plastic film layer, and a heat-adhesive resin layer are at least partially disposed through a release layer formed on the paper layer surface of the inner surface of the outer lid. The outer cover is formed so as to be peeled off, and a knob part protruding outward is formed on the outer peripheral edge, and an outer cover peeling start notch is formed on the inner lid adjacent to the inner side of the knob part and for a plurality of hot water cutting In the cover material which has a structure in which a cut is formed and a hot water cutting hole can be formed by peeling off the outer cover, the paper layer is added with 10 to 25% of filler, and the pulp freeness is 450 to 550 cc. It is a lid material with a hot water cut-off hole of the composition.

  In the lid member with a hot water cut hole, the water content of the paper layer is 3.5 to 5.5%.

  In the lid member with a hot water cut hole, the surface in contact with the paper layer surface on which the release layer of the extruded resin layer is formed is subjected to ozone treatment.

  In the lid member with a hot water cut hole, a hot water cut notch is formed on the inner lid on the peripheral edge opposite to the knob portion, and an opening is formed in a region between the hot water cut notch and the outer lid peeling start cut. A cut is formed, and a release layer is formed on the paper layer surface of the inner surface of the outer lid, in a region surrounded by the lid material peripheral edge inside the outer lid peeling start cut and outside the hot water cut cut and the opening cut. It is the structure which was made.

  In the lid member with a hot water cut hole, the release layer is peeled in a band shape having a predetermined width in a direction orthogonal to a line connecting the knob and the center of the cover material in an area between the cut line for hot water cut and the cut for opening. The second release layer has a high strength, and a region other than the region where the second release layer is formed is a first release layer having a lower peel strength than the second release layer.

  In the lid member with a hot water cut hole, the release layer is formed in a region surrounded by the opening notch in the direction orthogonal to the line connecting the knob and the center of the lid and the periphery of the lid. A second release layer having a high peel strength is formed in a stripe shape extending in a direction orthogonal to the line connecting the centers, and a region other than the region where the second release layer is formed has a peel strength lower than that of the second release layer. It is the structure made into 1 mold release layer.

  In the lid member with a hot water cut hole, the inner lid has a configuration in which a plurality of parallel linear cuts in a direction orthogonal to a line connecting the knob and the center of the lid member are formed in an area inside the opening cut. is there.

  By using the lid material with hot water cut holes according to the present invention, the laminate constituting the lid material does not contain aluminum foil, so inspection of the product attached by thermally bonding the lid material to a container containing instant fried noodles etc. It is possible to use a metal detector for the paper layer, and the paper layer forming the cover material absorbs moisture in the air. The paper layer does not easily expand and contract even when changed, and curling occurs during storage of the cover material that has been punched into a sheet and during the packaging process for attaching the cover material to the container, hindering the packaging operation. There is nothing to do.

  In the invention according to claim 2, since the moisture content of the lid is the moisture content of the paper layer in a state of approximately equilibrium with the humidity of the storage room or the packaging room, the moisture content of the paper layer is affected by the humidity in the air. It is possible to prevent the paper layer from expanding and contracting and the curling of the lid material from occurring when the rate is changed.

  In the invention according to claim 3, since the adhesive strength between the paper layer surface on which the release layer on the inner surface of the outer lid is formed and the extruded resin layer surface can be prevented from varying in the width direction and the flow direction of the original fabric during processing, The adhesive strength between the inner surface of the outer lid and the extruded resin layer can be made uniform.

  In the invention according to claim 4, the outer lid is peeled off about half to form an opening in the inner lid, hot water is poured into the container from the formed opening and the contents such as noodles are scalded, and then the outer lid is removed. It can be completely peeled off to form a hot water cut hole and cut hot water.

  In the invention according to claim 5, when the outer lid is peeled off from the inner lid and peeling reaches the location of the second release layer where the peeling strength in the region between the hot water cut and the opening cut is large, the peeling is heavy. Therefore, peeling of the cover material can be stopped in a half-open state without completely peeling the outer lid.

  In the invention according to claim 6, the outer lid is peeled off from the inner lid, and the peeling becomes heavy when reaching the location of the second release layer having a large lattice-like peeling strength formed on the outer lid. The outer cover is bent into a polygonal shape, and even if the peeling is stopped, the peeled outer lid does not return and closes the opening formed.

  In the invention according to claim 7, since the parallel linear cut is formed in the inner lid in the area surrounded by the opening cut that is adhered and removed to the outer lid when the outer lid is peeled off, the opening cut The lid member peeled off in a state where the inner lid of the region surrounded by the adhesive is adhered to the outer lid does not block the opening formed by returning to the original.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a bottom view showing a first embodiment of the present invention, FIG. 2 is a view showing a release layer formed on the inner surface of the outer lid of the first embodiment, and FIG. 3 is a laminated structure of the first embodiment. FIG. 4 is a bottom view showing a second embodiment of the present invention, FIG. 5 is a view showing a release layer formed on the inner surface of the outer lid of the second embodiment, and FIG. 6 is an enlarged cross-sectional view taken along the line II-II in FIG. 4 showing the laminated structure of the second embodiment, wherein 2 is a knob, 3 is an outer lid peeling start cut, 4 is an opening cut, 4a is a protrusion, 5 is a cut for hot water cutting, 6 is a parallel linear cut, 7 is a first release layer, 8 is a second release layer, 10 and 10 'are outer lids, 11 is a paper layer, and 12 and 22 are plastic film layers , 13 is an adhesive layer, 14 is a resin coat layer, 20 is an inner lid, 21 is an extruded resin layer, and 23 is a heat-adhesive resin layer.

  In the first embodiment of the lid member with a hot water cut hole of the present invention, the bottom surface shape is shown in FIG. 1, the shape of the release layer formed on the inner surface of the outer lid is shown in FIG. 2, and the cross-sectional configuration is shown in FIG. It is as follows. The lid material according to the first embodiment includes an outer lid 10 in which a resin layer made of a plastic film layer 12 and a paper layer 11 are laminated via an adhesive layer 13, and an extruded resin layer 21 and a plastic film layer 22 that are thermally bonded. An inner lid 20 made of a conductive resin layer 23 is configured to be peeled off through a release layer formed on the surface of the paper layer 11 of the outer lid 10. As shown in FIG. 1, the bottom face shape of the first embodiment is formed with a knob portion 2 that protrudes outward on the outer peripheral edge, and an outer lid peeling start cut 3 is formed inside the knob portion 2. A plurality of circular hot water cuts 5 are formed on the peripheral edge opposite to 2, and the outer cover is peeled off in a substantially quadrangular shape in the region between the hot water cuts 5 and the outer cover peeling start cut 3. An opening notch 4 having a shape with a protruding portion 4a protruding inward at a portion adjacent to the starting notch 3 is formed, and a line connecting the knob 2 and the center of the lid material in an area inside the opening notch 4 In this configuration, a plurality of parallel linear cuts 6 having a predetermined interval in the orthogonal direction are formed.

  The shape of the release layer formed on the inner surface of the outer lid 10 in the first embodiment is such that the knob 2 and the lid material are located in the region between the hot water cut 5 and the opening cut 4 as shown in FIG. A strip-shaped second release layer 8 having a predetermined width in the direction orthogonal to the line connecting the centers and having a large peel strength is formed, and an opening notch 4 in the direction orthogonal to the line connecting the knob 2 and the center of the lid material A plurality of second release layers 8 having a large peel strength are formed at predetermined intervals in a stripe shape extending in a direction orthogonal to the line connecting the knob 2 and the center of the lid material in a region surrounded by the periphery of the lid material, A region other than the region where the second release layer 8 is formed has a configuration in which the first release layer 7 having a lower peel strength than the second release layer 8 is formed.

  As shown in FIG. 3, the laminated structure of the first embodiment is composed of an outer lid 10 in which a resin layer composed of a plastic film layer 12 and a paper layer 11 are laminated via an adhesive layer 13, an extruded resin layer 21, and a plastic. The film layer 22 and the inner lid 20 made of the heat-adhesive resin layer 23 are interposed through the release layer made up of the first release layer 7 and the second release layer 8 formed on the surface of the paper layer 11 of the outer lid 10. The inner lid 20 is formed with an outer lid peeling start cut 3, a hot water cut 5, an opening cut 4, and a parallel linear cut 6 penetrating the inner lid 20. It is the composition which is. The printed pattern 9 is formed on the outer surface of the paper layer 11.

  In the second embodiment of the lid member with a hot water cut hole of the present invention, the bottom surface shape is shown in FIG. 4, the shape of the release layer formed on the inner surface of the outer lid is shown in FIG. 5, and the sectional configuration is shown in FIG. It is as follows. As shown in FIG. 4, the shape of the bottom side of the second embodiment is different from that of the first embodiment except that the parallel linear cut 6 is not formed in the area inside the opening cut 4 of the inner lid 20. Is the same.

  The shape of the release layer formed on the inner surface of the outer lid 10 in the second embodiment is as shown in FIG. 5, which is inside the outer lid peeling start cut 3, It is formed in a region outside the opening notch 4, and in a region having a predetermined width in a direction perpendicular to the line connecting the knob 2 and the center of the lid material in the region between the hot water notching 5 and the opening notch 4. The first release layer 7 having a smaller release strength than that of the second release layer 8 is formed in a region excluding the region where the second release layer 8 is formed as the second release layer 8 having a high peel strength. Shape.

  As shown in FIG. 6, the laminated structure of the second embodiment is such that an outer lid 10 ′ in which a resin layer composed of a resin coat layer 14 and a paper layer 11 are laminated, an extruded resin layer 21, and a plastic film layer 22 are thermally bonded. An inner lid 20 made of a conductive resin layer 23 is detachably laminated via a release layer made up of a first release layer 7 and a second release layer 8 formed on the surface of the paper layer 11 of the outer lid 10. In the inner lid 20, the outer lid peeling start cut 3, the hot water cut 5, and the opening cut 4 are formed so as to penetrate the inner lid 20. The printed pattern 9 is formed on the outer surface of the paper layer 11.

  The paper layer used for the lid member with a hot water hole in the first and second embodiments has a configuration in which 10 to 25% of filler is added to the paper layer and pulp freeness is 450 to 550 cc. When the pulp freeness is less than 450 cc, the paper easily expands and contracts and curls easily. When the pulp freeness exceeds 550 cc, a paper layer cannot be formed. As the filler, white clay, talc, calcium carbonate, titanium oxide, diatomaceous earth, barium sulfate, aluminum hydroxide, calcium carbonate and the like can be used. By configuring the paper layer as described above, even when the moisture content of the paper layer changes, the dimensional change of the paper layer due to the change of the moisture content can be kept small, thus preventing curling of the lid material. can do.

  Further, the water content of the paper layer is set to 3.5 to 5.5%. The relative humidity is generally about 40 to 60% at the place where the lid material with hot water cut holes is stored or where the lid material with hot water holes is attached by heat bonding to the container and filled with the contents. The equilibrium water content of the paper layer when the cover material is left in a room where is 40 to 60% is about 4.5 to 6.5%. Therefore, by setting the moisture content of the paper layer to 3.5 to 5.5%, which is close to the equilibrium moisture content, moisture absorption or dehumidification of the paper layer is extremely reduced and expansion and contraction due to moisture in the paper layer can be suppressed. It is possible to prevent curling of the cover member with the cut hole.

  The lid material with hot water cut holes of the first and second embodiments is attached by heat bonding to the mouth portion of a container containing instant fried noodles, etc. to form a package, and then the handle is grasped and the lid material is peeled off from the container The outer lid is peeled off from the inner lid at the outer lid peeling start cut point, and when the second release layer is reached, the outer lid becomes difficult to peel from the inner lid, and the outer lid is peeled off by the second mold release. Since it can stop at the location of the layer, it is possible to prevent the outer lid from being completely peeled off from the inner lid.

  In the lid material with a hot water cut hole of the second embodiment, when the grip part is grasped and the lid material is peeled off from the container and the outer lid is peeled off from the inner lid at the location of the outer lid peeling start cut, the knob part and the lid material In the region of the second release layer 8 having a plurality of strips formed in a stripe shape extending in a direction orthogonal to the line connecting the centers of the two layers, the peel strength is increased, so that the outer lid is peeled and peeled in a bent state. Since the lid has a polygonal shape, the opening formed by returning to the original shape is not blocked. In addition, when the opening is formed by extracting the part surrounded by the opening notch of the inner lid to the outer lid and forming the opening, the area surrounded by the opening notch being bonded to the outer lid The inner lid bends along multiple parallel linear cuts, reducing the rigidity of the outer lid where the inner lid is adhered and reducing the repulsive force, so the peeled lid material returns to the original It is possible to prevent the formed opening from being blocked.

  In the first embodiment of the present invention, it is preferable that the interval between the plurality of parallel linear cuts 6 is 5 to 10 mm and is formed in the entire region surrounded by the opening cuts 4. If the interval between the parallel linear cuts 6 is 5 mm or less, the rigidity as the lid member is lowered, and conversely, if it is 10 mm or more, the peeled lid member returns to the original state, which is not preferable. By setting the interval between the parallel linear cuts 6 in the above range, the lid material is peeled off by grasping the grip portion 2, and when the outer lid 10 is peeled off from the inner lid 20, it is extracted while being adhered to the outer lid 10. Since the region surrounded by the opening cut 4 of the inner lid 20 is bent along the parallel line cut 6, the elasticity of the outer lid 10 is reduced and the peeled shape can be maintained. The width of the second release layer 8 in the direction orthogonal to the line connecting the knob 2 and the center of the lid member in the first and second embodiments is preferably about 5 to 10 mm.

  As the releasable resin for forming the first release layer 7 and the second release layer 8, a single substance or a mixture of nitrified cotton, polyamide resin, polyester resin, acrylic resin, butyral resin, or the like can be used. If necessary, a small amount of silicone or the like may be added. The release layer is formed by printing on the paper surface by gravure printing using the ink made of the above resin. The first release layer and the second release layer are formed using one type of printing plate by forming a halftone dot printing plate having a dot area ratio of 55 to 100%. It becomes possible to do. If the halftone dot area ratio is less than 55%, the possibility of paper peeling increases, which is not preferable. The first release layer is formed using a halftone dot printing plate having a dot area ratio of 65 to 100%, and the second release layer is a halftone dot printing plate having a dot area ratio of 55 to 65%. Formed.

  The outer lid 10 has a structure in which a resin layer and a paper layer are laminated. The resin layer is an overprint layer by printing, a coating layer, or a biaxially stretched plastic film. The paper layer used for the outer lid 10 is preferably coated paper having a basis weight of 50 to 150 g. When the basis weight is 50 g or less, the outer lid peeling start cut, the opening cut, the hot water cut, the parallel line cut by half-cut from the inner surface of the laminated body for the lid material in which the outer lid and the inner lid are laminated. When forming so as to penetrate the inner lid and reach the paper layer of the outer lid, it is difficult to stop half-cutting at the paper layer. The inner lid 20 has a configuration in which an extruded polyethylene layer, a biaxially stretched plastic film, and a heat-adhesive resin layer are laminated. As the biaxially stretched plastic film, a biaxially stretched polyethylene terephthalate film (PET) can be suitably used.

  As a laminated structure of the lid material, for example, PET / dry lamination (DL) / printing layer / one piece art paper / release layer / ozone treatment / extruded polyethylene (PE) / PET / anchor agent layer / extruded polyethylene (PE) / Thermal adhesive resin layer, overprint layer / printing layer / art paper / release layer / ozone treatment / extruded polyethylene (PE) / PET / anchor agent layer / extruded polyethylene (PE) / thermal adhesive resin layer, etc. .

The bottom view which shows 1st Embodiment of this invention. The top view which shows the mold release layer formed in the inner surface of the outer cover of the cover material of 1st Embodiment. FIG. 2 is an enlarged cross-sectional view taken along the line I-I in FIG. 1, illustrating the stacked configuration of the first embodiment. The bottom view which shows 2nd Embodiment of this invention. The top view which shows the mold release layer formed in the inner surface of the outer cover of the cover material of 2nd Embodiment. The II-II line expanded sectional view of Drawing 4 showing the lamination composition of a 2nd embodiment.

Explanation of symbols

2 Knob 3 Cut for starting peeling of outer lid 4 Cut for opening
4a Protrusion 5 Cut for hot water cutting 6 Parallel cut line 7 First release layer 8 Second release layer 9 Pattern layer
10, 10 'outer lid
11 Paper layer
12, 22 Plastic film layer
13 Adhesive layer
14 Resin coat layer
20 Inner lid
21 Extruded resin layer
23 Thermal adhesive resin layer

Claims (7)

An outer lid made of a resin layer and a paper layer, and an inner lid made of an extruded resin layer, a plastic film layer, and a heat-adhesive resin layer are at least partially disposed through a release layer formed on the paper layer surface of the inner surface of the outer lid. The outer cover is formed so as to be peeled off, and a knob part protruding outward is formed on the outer peripheral edge, and an outer cover peeling start notch is formed on the inner lid adjacent to the inner side of the knob part and for a plurality of hot water cutting In the cover material which has a structure in which a cut is formed and a hot water cutting hole can be formed by peeling off the outer cover, the paper layer is added with 10 to 25% of filler, and the pulp freeness is 450 to 550 cc. A lid material with a hot water cut hole, characterized by comprising the above structure. 2. The lid member with a hot water hole according to claim 1, wherein the water content of the paper layer is 3.5 to 5.5%. 3. The lid material with hot water cut holes according to claim 1 or 2, wherein the surface of the extruded resin layer in contact with the paper layer surface on which the release layer is formed is treated with ozone. On the inner lid, a hot water cutting notch is formed at the peripheral edge opposite to the knob, an opening notch is formed in a region between the hot water cutting notch and the outer lid peeling start cut, and an inner surface of the outer lid is formed. It is characterized in that the release layer is formed on the paper layer surface in a region surrounded by a lid material periphery inside the outer lid peeling start cut and outside the hot water cut and the opening cut. The lid | cover material with a hot water cut-off hole in any one of Claims 1-3. The release layer is a second release layer having a high peel strength in a band shape having a predetermined width in a direction perpendicular to a line connecting the knob and the center of the lid material in a region between the hot water cut and the opening cut. 5. The hot water cutting device according to claim 4, wherein the region other than the region where the second release layer is formed is a first release layer having a peel strength smaller than that of the second release layer. Cover material with holes. A stripe extending in a direction orthogonal to the line connecting the knob and the center of the lid in a region surrounded by the opening notch in the direction orthogonal to the line connecting the knob and the center of the lid and the periphery of the lid. A second release layer having a high peel strength is formed, and a region other than the region where the second release layer is formed is a first release layer having a peel strength lower than that of the second release layer. The lid member with a hot water cut hole according to claim 4 or 5. 7. The inner lid has a configuration in which a plurality of parallel linear cuts in a direction orthogonal to a line connecting the knob and the center of the lid material are formed in an area inside the opening cut. The lid material with a hot water cut-out hole according to any one of the above.

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