Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
  • B65D77/10—Container closures formed after filling
  • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
  • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
  • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
  • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
  • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
  • B65D77/2048—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut
  • B65D77/2056—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened
  • B65D77/206—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened so as to uncover one or more preformed openings made through some layers of the cover
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
  • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/04—Interconnection of layers
  • B32B7/06—Interconnection of layers permitting easy separation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D43/00—Lids or covers for rigid or semi-rigid containers
  • B65D43/02—Removable lids or covers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
  • B65D53/04—Discs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
  • B65D77/10—Container closures formed after filling
  • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
  • B65D2577/10—Container closures formed after filling
  • B65D2577/20—Container closures formed after filling by applying separate lids or covers
  • B65D2577/2041—Pull tabs
  • B65D2577/205—Pull tabs integral with the closure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
  • B65D2577/10—Container closures formed after filling
  • B65D2577/20—Container closures formed after filling by applying separate lids or covers
  • B65D2577/2075—Lines of weakness or apertures
  • B65D2577/2091—Lines of weakness or apertures in cover

Definitions

• the present invention relates to a lid having excellent openability and being suitable for use in containers for instant foods and the like.
• the lid of a container for storing ready-to-eat foods such as cup noodles and instant yakisoba is easy to pouring when opened and can be easily sealed while being held for about 3 minutes. Is preferred.
• the opened lid In order to facilitate pouring at the time of opening, it is necessary that the opened lid is strongly curled and the opened state is maintained.
• the opening portion (flap portion) of the lid In order to facilitate resealing, it is necessary that the opening portion (flap portion) of the lid is easily engaged with the remaining portion of the lid or the container body, and the flap portion is held in a sealed state. It is.
• Patent Document 1 discloses a lid sealed to an upper end flange portion la of a container main body 1 for storing contents as shown in FIGS.
• a lid 200 is disclosed which has an opening tab portion 21 and tearing start points 22a and 22b provided on both sides of the opening tab portion 21. Since the lid 200 is made of at least a laminated sheet having a paper sheet with a dead hold property and a sealant film, when the tab 21 for opening is lifted, as shown in FIG. 32, the lid 200 is extended at the tear start points 22a and 22b. The strip is torn along the lines 220a and 220b to form a strip flap 3.
• the remaining side edges 2a and 2b of the lid 2 and the side edges 3a and 3b of the strip-shaped flapper 3 are jagged because the tear surface of the paper sheet is exposed. Therefore, after pouring in a state where the flap portion 3 has risen, when the flap portion 3 is resealed, the jagged side edges 2a and 2b of the lid 200 and the jagged side edges 3a and 3b of the band-shaped flap portion 3 are formed. Are engaged, and the flap portion 3 is tightly resealed. However, since the lid 200 has only the paper sheet as the dead-holding property-imparting layer, it was found that the rising of the flap portion 3 may not be sufficient.
• Patent Document 2 discloses a polybutylene terephthalate (PBT) film, a paper sheet, and a A cover 300 made of a laminated sheet having a sealant film is disclosed. Since the lid 300 has a PBT film having excellent dead-hold properties, the curl of the flap portion 3 is superior to the lid described in Patent Document 2. However, since the lid 300 has the flap portion 3 on the entire lower surface side of the paper sheet, for example, when the lid body 300 has a highly rigid resin film or the like on the lower surface side of the paper sheet, the lid 300 has It turned out that the rise was not always enough.
• PBT polybutylene terephthalate
• Patent Document 1 JP-A-2002-302154
• Patent Document 2 JP-A-2004-83099
• an object of the present invention is to provide a lid suitable for containers of instant foods and the like having a sufficient dead-hold property to hold an opened state.
• the present inventor has found that the flap portion obtained by opening the lid has a plastic layer having a large curl property on the entire surface, and does not have the entire layer portion on the entire surface.
• the present inventors have found that the provision of a partially easy-peeling layer can achieve excellent openability due to large curling properties, and reached the present invention.
• the first container sealing lid of the present invention has a paper sheet, a curable plastic layer, and a partially easily peelable layer, and the paper sheet is positioned below the curl plastic layer.
• the opening tab portion provided on the outer peripheral edge, and the tear starting points provided on both sides of the opening tab portion, and the partial easy peeling layer is provided with the tear tab. It is characterized by being provided outside the tearing direction extension line of the starting point.
• the partial easily peelable layer is formed from the tear starting point to a position beyond the center of the lid.
• the lid is provided with a peel stop mark, and the partial easily peelable layer is formed from the tear starting point to the position of the peel stop mark.
• a half force for opening is provided on the lower side of the lid along each extension line in the tear direction at the tear start point.
• the start end of the opening half-cut is Preferably, it is slightly separated from the point.
• the lid is composed of a laminated sheet having at least a curable plastic film, a paper sheet, and a heat-sealing film in order from the upper surface, and the opening half cut reaches at least the paper sheet in the laminated sheet.
• the opening half-cut preferably reaches a depth of at least about 30% of the thickness of the paper sheet.
• the second container sealing lid of the present invention has a paper sheet, a curable plastic layer, and a partially easily peelable layer, and the paper sheet is positioned below the curl plastic layer.
• a container sealing lid sealed to a container comprising: an opening tab provided on an outer peripheral edge; a tab cut-off half-cut provided on a lower surface side of the opening tab; A pouring hole forming annular half cut engraved below the lid at a center side of the peeling half cut, and the partially easy peeling layer surrounds the pouring hole forming annular half cut. It is characterized by being provided as follows.
• the partial easy peeling layer is formed from the half cut for peeling off the tab portion to a position beyond the center of the lid. It is preferable that a peeling stop mark is provided on the lid body, and the partial easy peeling layer is formed from the half cut for peeling off the tab portion to the position of the peeling stop mark.
• the third container sealing lid of the present invention affixed to the instant food container to be drained after pouring has the following features in addition to the features of the first or second lid. That is, the container sealing lid has a hot water cutout forming tab portion, and the hot water cutout forming tab portion has a pair of cuts and the open end facing inward between the pair of cuts.
• each U-shaped half cut comprises a pair of linear portions and a connecting portion of both linear portions, Both the cut and the front end of the U-shaped half cut are located in the seal portion of the lid, and the hot water cutout is formed from the portion surrounded by the U-shaped half cut and the tips of the pair of straight portions. Between the straight lines extending in the opening direction of the tab portion, a partially easy peeling layer for forming a hot water cutout is provided.
• the direction of easy tearing of the lid substantially coincides with the direction of the cut, and when the lid is peeled off from the container body with the hot water cutout forming tab portion, the cut is formed. And the lid is torn from the tip of the U-shaped half cut, It is preferable that a portion on the lower surface side of the partially peelable layer for application remains in close contact with the upper end flange portion of the container body so that a plurality of hot water outlets are formed.
• the U-shaped half cut has a depth from the lower surface of the lid to the partial easily peelable layer. It is preferable that the partially cut-off layer for forming the cutout is provided from the U-shaped half-piece to the position of the peeling stop mark for the tab for forming the cutout.
• the pair of straight portions of the U-shaped half-cut is inclined so that the distance between the straight portions decreases. It is preferable that a pair of line portions that are inclined so as to increase the interval as they go forward are provided at the ends of the pair of cuts.
• a tip of the cut and a tip of a pair of straight portions of the U-shaped half-cut are located on an outer peripheral side with respect to a center line of a seal portion of the lid. It is more preferable that the positions of the leading end of the cut and the leading ends of the pair of straight portions of the U-shaped half-cut in the seal portion are within a range of 30 to 50% of the width of the seal portion from the outer periphery.
• a half cut for forming a hot water cutout is provided on a straight line extending in the opening direction from each end of the cut. It is preferable that a half cut for forming a hot water outlet is provided below the lid along a straight line extending from each end of the U-shaped half cut in the opening direction.
• the fourth container sealing lid of the present invention which is affixed to the instant food container to be drained after pouring, has the following features in addition to the features of the first or second lid. That is, in this container sealing lid, (a) a plurality of rectangular cutout forming half cuts are engraved on the lower side of the lid at a position substantially opposed to the opening tab. b) The partial easily peelable layer extends in the opening direction from the tearing start point of the opening tab portion and is connected in a region inside the opening tab portion or a region beyond the center of the lid. And (c) a region not having the U-shaped partially easily peelable layer, and the U-shaped partially easily peelable layer. A half-cut for layer separation is engraved on the lower side of the lid along a boundary substantially orthogonal to the opening direction among the boundaries with the region having the opening.
• the U-shaped partially easy peeling layer has a boundary with a region having no U-shaped partially peelable layer in the opening direction. It is preferable that the substantially perpendicular boundary is provided so as to be curved toward the center of the lid.
• each of the first to fourth container sealing lids has a polybutylene terephthalate film as the curable plastic layer.
• Each of the first to fourth container sealing lids has a curable plastic layer, a paper sheet, an adhesive layer, a rigid plastic film, and a sealant layer from the upper surface side, and the partially easily peelable layer is It is preferably provided on the adhesive layer.
• the rigid film is preferably made of a biaxially oriented polyethylene terephthalate film having a uniaxial orientation or a different degree of orientation.
• the partial easily peelable layer is on the upper surface or the lower surface of the adhesive layer, or is in the same plane as the adhesive layer.
• an adhesive plastic (for example, polyethylene) film is provided on both sides of the partially easy release layer so that the paper sheet is not exposed on the release surface.
• the container sealing lid of the present invention has a large curl property because the flap portion obtained by opening has a plastic layer having a large curl property on the entire surface and does not have the entire layer part on the entire surface. This makes it possible to utilize the excellent open holding property. Therefore, at the time of opening, the flap portion can be maintained in a large raised state so that pouring is easy. Further, when the partially easy peeling layer is provided on the upper surface side of the paper sheet, the jagged broken surface of the paper sheet is exposed at the flap portion obtained by opening, and excellent re-engagement due to engagement of the jagged broken surface of the paper sheet is achieved. Sealability can also be used.
• the flap portion is simply returned to the original position, and the lid is brought into firm engagement with the lid, so that the resealed state can be reliably maintained.
• the lid having the partially easily peelable layer on the upper surface side of the paper sheet is excellent in both the openability and the resealability.
• the lid of the present invention having such characteristics is suitable as a lid for instant food such as a cup ⁇ which is poured with hot water and eaten.
• the food container provided with a lid having excellent curling properties of the present invention is also useful as a small container for containing a flavor additive that can be used only for ready-to-eat foods.
• FIG. 1 is a perspective view showing a container sealing lid according to one embodiment of the present invention attached to a cup ramen container.
• FIG. 2 is a plan view showing the lid of FIG. 1.
• FIG. 3 is a bottom view showing the lid of FIG. 1.
• FIG. 4 is an enlarged cross-sectional view taken along the line A—A in FIG. 2.
• FIG. 5 is an enlarged sectional view showing a portion X in FIG. 4.
• FIG. 6 is an enlarged sectional view taken along line B_B of FIG. 5.
• FIG. 7 is an enlarged sectional view showing another layer configuration of the lid.
• FIG. 8 is a perspective view showing a state where the lid of FIG. 1 attached to the cup ramen container is opened.
• FIG. 9 is a perspective view showing a state where the lid of FIG. 1 attached to the cup ramen container is opened and then resealed.
• FIG. 10 is a plan view showing a lid according to another embodiment of the present invention.
• FIG. 11 is a plan view showing a state where the flap portion formed by opening the lid in FIG.
• FIG. 12 is an enlarged cross-sectional view taken along the line CC of FIG. 10.
• FIG. 13 is a plan view showing a lid according to still another embodiment of the present invention.
• FIG. 14 is a bottom view showing the lid of FIG. 13.
• FIG. 15 is a partially enlarged view showing the vicinity of a hot water cutout forming tab portion of the lid of FIG.
• FIG. 14 is another partially enlarged view showing the vicinity of the hot water cutout forming tab portion of the lid of FIG.
• FIG. 17 is an enlarged sectional view taken along the line D_D in FIG. 13.
• FIG. 18 is an enlarged cross-sectional view taken along line EE of FIG. 13.
• Garden 19 is a partially enlarged view showing a state in which the hot water cutout forming tab portion of FIG. 13 is opened.
• FIG. 20 is a plan view showing a lid according to still another embodiment of the present invention.
• FIG. 21 is a bottom view showing the lid of FIG. 20.
• FIG. 22 is an enlarged sectional view taken along line FF of FIG. 20.
• FIG. 23 is an enlarged sectional view taken along line G_G in FIG. 20.
• FIG. 21 is a perspective view showing a state in which a flap portion formed by opening the lid of FIG. 20 attached to the instant noodles container is removed.
• FIG. 25 is a perspective view showing a lid according to still another embodiment of the present invention attached to a cup ramen container.
• FIG. 26 is a perspective view showing a lid according to still another embodiment of the present invention attached to a cup ramen container.
• FIG. 27 is a perspective view showing a lid according to still another embodiment of the present invention attached to a container for instant yakisoba.
• FIG. 28 is an enlarged sectional view showing still another layer configuration of the lid of the present invention.
• FIG. 29 is an enlarged sectional view showing still another layer configuration of the lid according to the present invention.
• FIG. 30 is a plan view showing a state in which a plurality of lids are punched from a laminated sheet.
• FIG. 31 is a perspective view showing an example of a conventional lid attached to a cup ramen container.
• FIG. 32 is a perspective view showing a state where the lid of FIG. 31 attached to the cup ramen container is opened.
• FIG. 13 shows a first lid of the present invention.
• the lid 2 attached to the cup ramen container 1 has an opening tab portion 21 and tearing start points 22a and 22b provided on both sides of the opening tab portion 21.
• Partially easily exfoliated layers 23a and 23b are provided outside the tearing direction extension lines 220a and 220b of the pair of tear starting points 22a and 22b.
• the tear start points 22a and 22b can be cut or notched. In the present embodiment, a description will be given below by taking a cut as an example of the tear starting points 22a and 22b.
• the distance d between the pair of cuts 22a and 22b can be set as appropriate according to the type of the content. For example
• the distance d between the cuts 22a and 22b is about 4 cm.
• another opening tab may be integrally provided on the lid 2 at a position facing the outer peripheral edge.
• the tips of the pair of cuts 22a and 22b are provided with lids for sealing the contents.
• the tolerance is about lmm. Therefore, the ends of the pair of cuts 22a and 22b are connected to the center line 25a of the sealing portion 25 of the lid 2.
• the outer peripheral force which is more preferably on the outer side, is more preferably in the range of 30 to 50% of the width of the seal portion 25, and is preferably in the range of 30 to 40% of the width of the seal portion 25 from the outer periphery.
• the partially easily peelable layers 23a and 23b be formed up to a position exceeding the center 0 of the lid 2. For example, as shown in FIG. 2, the partially easily peelable layers 23a and 23b are formed at least to the position of the peeling stop mark 26.
• opening half cuts 24 a and 24 b are engraved on the lower side of the lid 2 along extension lines 220 a and 220 b.
• the lid 2 can be easily torn.
• the pair of cuts 22a, 22b and the opening ends 240a, 240b of the opening half cuts 24a, 24b must be slightly separated. This is because the lid 2 must be heat-sealed to the container body 1 without any gap before opening.
• the distance d between the pair of cuts 22a, 22b and the opening ends 240a, 240b of the opening half cuts 24a, 24b is preferably 1 to 10 mm, more preferably 2 to 5 mm.
• the opening half cuts 24a and 24b are preferably formed up to a position beyond the center 0 of the lid 2. For example, as shown in FIG. 3, the opening half cuts 24a and 24b are peeled off and formed up to the position of the stop mark 26.
• the lid 2 is composed of a curable plastic (PBT) film 201, an extruded laminated polyethylene layer 203a, an adhesive layer 202, an extruded laminated polyethylene layer 203b, a paper sheet 204, and an adhesive layer.
• PBT curable plastic
• 205 an extruded laminated polyethylene layer 206, a rigid plastic (PET) film 207, a light-shielding ink layer 208, an adhesive layer 209, an extruded laminated polyethylene layer 210, and a sealant layer 211.
• the partially easily peelable layers 23a and 23b are formed as a part of the adhesive layer 202.
• the half cuts 24a and 24b for opening are formed by penetrating the sealant layer 211, the polyethylene layer 210, the adhesive layer 209, the light-shielding ink layer 208, the rigid plastic film 207, the polyethylene layer 206, and the adhesive layer 205 from the lower surface of the lid 2 to paper. Part of sheet 204 has been reached.
• the opening half cuts 24a, 24b preferably reach a depth d which corresponds to at least about 30% of the thickness d of the paper sheet 204.
• perforations along the extension lines 220a, 220b may be provided only on the paper sheet 22.
• an adhesive layer 202 is formed between a pair of polyethylene layers 203a and 203b between a curable plastic (PBT) film 201 and a paper sheet 204.
• a part is a partially easy peeling layer 23b.
• the partially easily peelable layer 23b has a structure in which the point-like peelable resin 125 is uniformly distributed in the adhesive layer 202, as shown in FIG.
• the partially easily peelable layer is not limited to this, and may be a peelable resin layer applied in a thin film form on the upper surface side or the lower surface side of the adhesive layer 202.
• FIG. 7 shows another configuration of the lid 2 of the present invention.
• the partially easy release layers 23a, 23b are formed as part of an adhesive layer 205 provided between a pair of polyethylene layers 206a, 206b between the paper sheet 204 and the rigid plastic (PET) film 207.
• PET rigid plastic
• the opening half cuts 24a and 24b pass through the sealant layer 211, the polyethylene layer 210, the adhesive layer 209, the light-shielding ink layer 208, the rigid plastic film 207, and the polyethylene layer 206b from the lower surface of the lid 2, and reach the adhesive layer 205. are doing.
• the lid 2 When the opening tab 21 of the lid 2 made of the laminated sheet 20 shown in FIG. 4 is lifted, the lid 2 is peeled off from the upper end flange portion la of the container 1 as shown in FIG.
• the film is torn along 220a and 220b, and the curl plastic (PBT) film 201 is separated from the lower portion of the paper sheet 204 by the partially easily peelable layers 23a and 23b. Since the paper sheet 204 is torn along the extension lines 220a and 220b, the jagged fractured surfaces 2a and 2b are formed on the side of the remaining lid 2, and the jagged fractured surfaces 3a and 3b are also formed on the flap portion 3. . Therefore, as shown in FIG.
• the opening half cuts 24a and 24b can be omitted. That is, when the rigid plastic (PET) film 207 of the laminated sheet 20 constituting the lid 2 has an easy tearing property, the easy tearing direction substantially coincides with the tearing direction of the lid 2 so that the lid 2 can be opened. This is because, when the lid 2 is peeled off by holding the tab 21, the lid 2 is easily and linearly torn from the pair of cuts 22 a and 22 b along the easy tearing direction.
• the cup ramen container 1 has a sufficient opening for pouring. in this way
• the lid 2 having the partially easily peelable layers 23a and 23b on the upper surface side of the paper sheet 204 is excellent in both the unsealing holding property and the resealability.
• the lid 2 affixed to the cup ramen container 1 includes an opening tab portion 21, a tab portion peeling half cut 24d provided on the lower surface side of the tab portion 21, and a tab side peeling half cut 24d at a center side from the tab portion peeling half cut 24d. It has a pouring port forming annular half cut 24c engraved on the lower side of the lid 2, and a partially easy peeling layer 23 provided so as to surround the pouring port forming annular half cut 24c.
• annular half cut 24c for forming a pouring port has a size sufficient for pouring.
• the pouring port forming annular half cut 24c may be an annular shape so as to form a pouring port, and may have a rectangular shape, a trapezoidal shape or the like other than the elliptical shape as shown in FIG.
• the partially easy-peeling layer 23 be formed from the tab-cutting half-cut 24 d provided on the opening tab 21 to a position beyond the center 0 of the lid 2.
• the partial easily peelable layer 23 is formed at least to the position of the peeling stop mark 26.
• the lid 2 has the same layer configuration as that shown in FIG. 4, and the partially easy-peeling layer 23 is formed by a pair of curlable plastic films 201 and a paper sheet 204. It is provided as a part of the adhesive layer 202 between the polyethylene layers 203a and 203b.
• An annular half cut 24c for forming a pouring port and a half cut 24d for separating a tab portion are provided on the lower surface of the lid 2 from the sealant layer 211, polyethylene layer 210, adhesive layer 209, light-shielding ink layer 208, rigid plastic film 207, and polyethylene layer 206. , Through the adhesive layer 205 and the paper sheet 204 to reach the adhesive layer 202.
• the curl plastic (PBT) film 201 is separated from the paper sheet 204 by the partial easy-peeling layer 23 from the paper sheet 204. I do. Since the jagged fractured surface 2c is formed on the side of the remaining lid 2 and the jagged fractured surface 3c is also formed on the flap portion 3, the resealing of the flap portion 3 can be ensured similarly to the first lid.
• FIG. 13 16 shows a third lid of the present invention.
• the cover 2 has (a) a hot water cutout forming tab 27 at a position substantially opposite to the opening tab 21, and (b) a pair of cuts 28 a, 28 b and both cuts 28 a in the tab 27. And a plurality of substantially U-shaped half-cuts 29 engraved on the lower side of the lid 2 at substantially equal intervals between the U-shaped half-cuts 29 and 28b.
• Each of the cuts 28a and 28b may be linear, but in order to improve tearability, the straight portions 280a and 280b extending from the outer peripheral edge of the lid 2 and the direction of expanding from the straight portions 280a and 280b It is preferable that each of the end portions 281a and 281b be inclined.
• Each U-shaped half cut 29 is composed of a pair of inclined portions 291 and 291 that are inclined so that the distance between them becomes smaller as going forward, and their connecting portions 290, with the open ends facing inward. Preferably, it is substantially U-shaped, thereby improving tearability. However, the pair of inclined portions 291 and 291 may be parallel straight lines.
• the number of U-shaped half cuts 29 is preferably 1 to 6, more preferably 2 to 5.
• the tip inclined portions 281a and 281b and the inclined portions 291 and 291 must all be located within the seal portion 25 of the lid 2. Nanare.
• the tolerance is about lmm, so that the tip of the pair of cuts 28a, 28b and the tip of the inclined portion 281a, 281b, and each U-shape.
• the tip of the inclined portions 291, 291 of the half cut 29 is preferably 30-50 of the width d of the seal portion 25 from the outer peripheral side, which is more preferably on the outer peripheral side than the center line 25 a of the seal portion 25 of the lid 2. within / o
• the width of the seal part 25 from the outer periphery which is more preferable, is 30-40. Particularly preferred is in the range of / o. Also, when the lid 2 is peeled off by holding the hot water cutout forming tab 27, the tightness of the strip 11 From the viewpoint of not deteriorating the adhesion, the connecting portion 290 of the U-shaped half cut 29 is preferably located in the seal portion 25.
• the opening resistance increases.
• the opening resistance is maximum at the start of peeling, and when the peeling area with the seal portion 25 is large, a large initial opening resistance is felt. Therefore, as shown in FIG. 15, the exfoliated area from the seal portion 25 is gradually increased by the tip portions 281a and 281b inclined in the expanding direction and the inclined portions 291 and 291 having a smaller interval as going forward. It is possible to smoothly open the hot water cutout forming tab portion 27 without feeling a large initial resistance.
• each tip inclined portion 281a, 281b and each inclined portion 291 be 0.5-3 mm.
• the angle ⁇ between the inclined portions 281a and 281b and the straight portions 280a and 280b, and the angle ⁇ between the inclined portion 291 and the straight line 292 are both preferably 120 ° to 170 °. May be the same. If these angles are out of this range, even if the lid 2 is easily tearable, the lid 2 is torn linearly along the direction of easy tearing from each of the inclined portions 281a and 281b and the inclined portion 291. May not be.
• the distance d between the tips of the inclined portions 291 and 291 is 0.5 to 3 mm larger than the width d of the U-shaped half cut 29.
• the instant food in the container is fried noodles
• the distance d between the tips of 291 and 291 is preferably 6 to 8 mm.
• the distance d between the pair of cuts 22a and 22b provided on both sides of the opening tab portion 21 can be appropriately set according to the type of the contents. For example, a cup that pours boiling water.
• the distance d between the cuts 22a and 22b is preferably about 9-115 cm. Also, U-shaped half cut 29 width d, each cut
• the distance d between the U-shaped half cut 29 and the distance d between the U-shaped half cuts 29 is 3 to 10 mm, respectively.
• a half cut 283 for forming a hot water outlet on straight lines 282, 282 extending from the respective ends of the cuts 28a, 28b.
• a half-cut for forming a hot water cutout is formed on a straight line 292 extending at the tip end of each inclined portion 291 of the U-shaped half cut 29.
• 293 is engraved.
• each inclined portion 291 of the U-shaped half cut 29 and the starting end 293 ′ of the half cut 293 for forming a hot water outlet are formed.
• the distance d between the tip of each inclined portion 291 and the starting end 293 'of the half cut 293 for forming a hot water outlet is preferably 1 to 10 mm, more preferably 2 to 5 mm.
• the ends of the half cuts 283 and 293 for forming the hot water outlet are preferably several cm from the upper end flange.
• the direction of easy tearing substantially coincides with the direction of tearing of the lid 2.
• the lid 2 when the lid 2 is peeled off by holding the hot water port forming tab 27, the lid 2 extends along the easy tearing direction from the tips of the pair of cuts 28a and 28b and the tips of the U-shaped half cuts 29. Almost and linearly.
• the lid 2 has an easy tearing property, it is possible to omit the half cuts 283 and 293 for forming the hot water outlet.
• the lid 2 has the same layer configuration as the laminated sheet 20 shown in FIG. 4, and the partially easily peelable layer 23c is a pair of the paper sheet 204 and the rigid plastic film 207. It is provided as a part of the adhesive layer 205 between the polyethylene layers 206a and 206b.
• the U-shaped half cut 29 is formed by sealing the sealant layer 211, the extruded polyethylene layer 210, the adhesive layer 209, the light-shielding ink layer 208, the rigid plastic (PET) film 207, and the extruded lamination from the lower surface of the lid 2. It penetrates through the polyethylene layer 206b and reaches the adhesive layer 205.
• the half cut 283 for forming the hot water outlet is at least about the thickness of the paper sheet 204 which preferably reaches a part of the paper sheet 204 from the upper surface of the lid 2. More preferably, a depth corresponding to 30% is reached. It is preferable that the half cut 293 for forming the hot water outlet reaches the adhesive layer 205 from the lower surface of the lid 2 as in the case of the U-shaped half cut 29.
• a mark 260 indicating a peeling limit is provided on the lid 2 at a position where the instant food (eg, fried noodles) in the container can be efficiently drained without leaking.
• the position of the mark 260 is preferably set such that the length of the hot water outlet 12 is about 115 cm.
• the length of the partially easy peeling layer 23c may be substantially the same as the length of the hot water cutout 12 to be formed.
• the third lid may have the features of the second lid with respect to the function of holding the lid 2 in unsealing.
• 20 and 21 show a fourth lid of the present invention. 20 and 21, the same reference numerals are given to the same members or parts as in FIGS.
• the lid 2 is provided with a plurality of rectangular half cuts 294 for forming a hot water cutout at a position substantially opposed to the opening tab portion 21 on the lower side of the lid 2.
• the easily peelable layer 23 extends in the opening direction from the tear start point of the tab portion 21 with the extension lines 220a and 220b as boundaries, and is connected in a region beyond the center 0 of the lid 2 to form a U-shape, and (C) of the boundary between the region having no U-shaped partially easily peelable layer 23 and the region having the U-shaped partially easily peelable layer 23 It is substantially the same as the first lid except that a half cut 24e for layer separation is engraved on the lower side of the lid 2 along a boundary 230 substantially orthogonal to the opening direction. As shown in FIG. 20, the partial easily peelable layer 23 is preferably provided so that a boundary 230 with a region not having the layer 230 is curved toward the center of the lid 2.
• the partially easily peelable layer 23 is formed in a region inside the opening tab portion 21 (from the tab portion 21 to the center 0), which is not necessarily intended to be limited to the connection beyond the center 0 of the lid 2. Area).
• the lid 2 has the same layer configuration as that shown in FIG. 4, and the partially easy-peeling layer 23 is formed by a pair of curlable plastic films 201 and a paper sheet 204. It is provided as a part of the adhesive layer 202 between the polyethylene layers 203a and 203b.
• the half-cut 24e for layer separation is formed from the lower surface of the lid 2 from the sealant layer 211, polyethylene layer 210, adhesive layer 209, light-shielding ink layer 208, rigid plastic film 207, polyethylene layer 206, adhesive layer 205, and paper sheet 204.
• the rectangular half cut 294 for forming the hot water outlet also reaches the adhesive layer 202 from the lower surface of the lid 2.
• the fourth lid may have the feature of the second lid with respect to the function of holding the lid 2 unsealed.
• first to fourth lids are not limited to those illustrated, and various changes can be made without changing the spirit of the present invention.
• FIG. 25 shows the lid 2 provided with a slit-like through hole 221 at a position corresponding to the outer edge of the upper end flange portion la in the opening tab portion 21.
• the lid 2 is the same as the first lid except for the slit-shaped through hole 221.
• the upper flange portion la can be engaged with the slit-shaped through hole 221 so that the resealability is improved.
• a cut may be provided instead of the slit-shaped through hole 221.
• FIG. 26 shows an example in which a lid 2 is provided with a slit-shaped through hole 221 and another tab portion 222.
• the lid 2 is the same as the first lid except for the slit-shaped through hole 221 and the tab portion 222. By opening the tab portion 222 with the slit-shaped through hole 221, the lid 2 can be kept open.
• the lid 2 shown in FIG. 27 is to be affixed to the square instant fried noodle container 1, and the opening tab 21 and the hot water cutout forming tab 27 are provided at substantially diagonal corners. .
• the structure of the lid 2 itself is the same as that of the third lid.
• a partially easy-peeling layer is provided in a region having a hot water outlet, and the lower side of the lid 2 is provided. It is good also as the composition which carved a plurality of circular half cuts for forming a hot water cut reaching the easily peelable layer
• the laminated sheet 20 shown in FIG. 28 is the same as the laminated sheet 20 shown in FIG. 4 except that it does not have the rigid plastic film 207.
• the laminated sheet 20 shown in FIG. 29 is the same as the example shown in FIG. 4 except that an aluminum foil 212 is used instead of the light-shielding ink layer 208 as a light-shielding property imparting layer.
• the lid 2 of the present invention has a curable plastic film 201 outside a paper sheet 204.
• a polyester film is preferable.
• the polyester film include films made of polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), and the like.
• PBT and PET films are commercially available at low cost.
• a PBT film is preferable because it has excellent dead hold properties, fragrance retention properties, gas barrier properties, and heat resistance.
• the PBT film is basically a saturated polyester film that is powerful with 1,4-butanediol and terephthalic acid.
• a diol component other than 1,4-butanediol or a cambonic acid component other than terephthalic acid may be contained as a copolymer component as long as physical properties such as heat shrinkage are not impaired.
• Examples of such a diol component include ethylene glycol, diethylene glycol, neopentyl glycol, 1,4-cyclohexanemethanol and the like.
• the dicarboxylic acid component include isophthalic acid, sebacic acid, adipic acid, azelaic acid, and succinic acid.
• Specific examples of the PBT resin constituting the PBT film include, for example, a homo-PBT resin commercially available from Toray Industries, Inc. under the trade name “Trecon”.
• the PET film is basically a saturated polyester film composed of ethylene glycol, terephthalic acid, and strength.
• a diol component other than ethylene glycol or a cambonic acid component other than terephthalic acid may be included as a copolymer component as long as the properties of the PET film are not impaired.
• Such diol components include, for example, diethylene glycol, 1,4-butanediol, neopentyl glycol, 1,4-cyclohexanemethanol, etc.
• the dicarboxylic acid component includes, for example, isophthalic acid, sebacic acid, adipic acid, azelaic acid, and succinic acid.
• PET finolems are usually marketed as biaxially stretched films, such as “Lumirror” from Toray Industries, Inc., “Toyobo Ester Film” from Toyobo Co., Ltd., and “Emblet PC” from Unitika Ltd. Being done.
• the polyester film is not limited to one composed of a single resin component, and may be composed of a plurality of resin components.
• the combination of resin components include, in addition to a combination of a plurality of polyester resins, one or two or more kinds of polyester resins to which other thermoplastic resins are added as long as their properties are not impaired.
• thermoplastic resins include polyphenylene sulfide (PPS); polyamide (PA); polyimide (PI); polyamide imide (PAI); polyether sulfone (PES); polyether ether ketone (PEEK); Polycarbonate; Polyurethane; Fluororesin; Polyolefin such as polyethylene and polypropylene; Polyvinyl chloride; Thermoplastic elastomer.
• PPS polyphenylene sulfide
• PA polyamide
• PI polyimide
• PAI polyamide imide
• PES polyether sulfone
• PEEK polyether ether ketone
• Polycarbonate Polyurethane
• Fluororesin Polyolefin such as polyethylene and polypropylene
• Polyvinyl chloride Polyvinyl chloride
• Thermoplastic elastomer polycarbonate; Polyurethane; Fluororesin; Polyolefin such as polyethylene and polypropylene; Polyvinyl chloride
• the proportion is preferably 5 to 20% by mass, more preferably 5 to 15% by mass, assuming that the entire polyester film is 100% by mass. — 10% by weight is particularly preferred. Therefore, unless otherwise specified, the terms ⁇ PET film '' and ⁇ PBT film '' used herein refer not only to PET or PBT alone, but also to PET or PBT + other thermoplastic resin compositions. Should be understood to include.
• the curable plastic film 201 may be made of a plasticizer, a stabilizer such as an oxidizing agent or an ultraviolet absorber, an antistatic agent, a surfactant, a dye, a pigment, or the like, depending on the use of the instant food container. Colorants, lubricants for improving fluidity, and additives such as inorganic fillers may be appropriately contained.
• the thickness of the curling plastic film 201 is practically preferably about 5 to 50 ⁇ m. It is technically difficult to make the thickness of the curl plastic film 201 less than about 5 ⁇ m. Further, if the thickness of the curling plastic film 201 is set to more than about 50 ⁇ m, the cost increases. Preferably, it is 10-30 ⁇ . 5 Film with a thickness of about 5-50 / im Has good hold properties, fragrance retention properties and gas barrier properties.
• the thermal shrinkage of the PBT film is preferably 2% or less for both MD (machine direction) and TD (width direction).
• the heat shrinkage was measured by heating the PBT film to 150 ° C for 10 minutes.
• Heat shrinkage ratio is 2.
• PBT films with a size of / 0 or less can be manufactured by air-cooled inflation molding. Examples of a method for producing a PBT film by an air-cooled inflation molding method include a method described in WO 2004/026558.
• the transparent resin may be either water-soluble or non-water-soluble, but a water-soluble resin is preferred because an organic solvent is not required.
• the water-soluble transparent resin include polyvinyl alcohol, cellulosic polymers, polyvinylpyrrolidone, polyethylene glycol, polyacrylamide and the like.
• the polyvinyl alcohol may be modified with an anion, a cation, an acetal, or the like, or may be an ethylene-vinyl alcohol copolymer, a partially saponified polyvinyl acetate, or the like.
• the polymerization degree of the poly (vinyl alcohol) is preferably 1,000 or less.
• water-insoluble transparent resin examples include an acrylic resin, a polyurethane resin, an epoxy resin, a polystyrene resin, an ultraviolet-curable unsaturated acrylic resin, an ultraviolet-curable unsaturated ester resin, and a polycarbonate resin.
• the thickness of the transparent resin coating layer is not limited, but is preferably 24 ⁇ m, more preferably 1 ⁇ m to 5 ⁇ m.
• the thickness of the transparent resin coating layer is less than lzm, the sharpness of printing is not sufficiently improved, and when it exceeds 5zm, the cost increases.
• the paper sheet 204 functions as a dead-hold property imparting layer.
• the type of paper is not limited, and includes synthetic paper.
• the basis weight of the paper sheet 204 is preferably about 60 to 120 g / m 2 , more preferably about 75 to 110 g / m 2 . When the basis weight of the paper sheet 204 is less than about 60 g / m 2, the paper The seat is too weak to provide sufficient dead hold. On the other hand, even if the basis weight of the paper sheet 204 exceeds about 120 g / m 2 , further improvement in the dead-hold property is not recognized only at the cost increase.
• Rigid plastic film 207 preferably comprises a PET film.
• a biaxially oriented PET film having a uniaxial orientation or a different degree of orientation as the PET film.
• Biaxially oriented PET films with different degrees of orientation are commercially available as "Emblet PC" (Unitichika Co., Ltd.).
• Emblet PC Unitichika Co., Ltd.
• the linear tearability of the lid 2 is improved. It is preferable that the direction of the straight tearability of the lid 2 is parallel to the opening half cuts 24a and 24b. The thickness may be appropriately set as needed.
• the lid 2 has a light-shielding ink layer 208 or an aluminum foil 212 to prevent deterioration of the ready-to-eat food due to sunlight or ultraviolet rays.
• the light-shielding ink 208 is not particularly limited as long as it is an ink containing a black or dark pigment or dye such as carbon black.
• the light-shielding ink layer 208 has the advantage that there is no adverse effect on the environment during the incineration treatment, and also has the advantage that metal foreign substances in a sealed container can be detected by a metal detector. There is also an IJ point. Therefore, the use of metal detectors that not only enhance the safety of ready-to-eat foods can significantly reduce inspection costs.
• the aluminum foil 212 has excellent light shielding properties, gas barrier properties, fragrance retention properties, and the like.
• the thickness of the light-shielding ink layer 208 is not particularly limited as long as it is a force that depends on the concentration of the black pigment or dye in the ink.
• the thickness of the aluminum foil 212 is preferably 315 ⁇ m, more preferably 712 ⁇ m.
• the layer that is heat-sealed to the upper end flange portion la of the container body 1 is the sealant film 211 or the hot melt layer.
• the sealant film 211 can be formed from a polyethylene film, an unstretched polypropylene finolem, an ionomer resin film, a polystyrene film, or the like.
• the sealant film 211 has an easy-to-use seal so that the lid 2 can be easily peeled off from the container body 1. It is preferable to have a single property. For this reason, it is preferable that the sealant film 211 has relatively weak thermal adhesiveness. A known hot melt can be used.
• the sealant film 211 for example, a laminated film having a polyethylene base film and a low molecular weight polyethylene film in the order of the paper sheet 204 can be used.
• the thickness of this polyethylene-based film is preferably about 10-40 ⁇ m, more preferably about 20-30 ⁇ m.
• the thickness of the low molecular weight polyethylene film is preferably about 520 x m, more preferably about 7 to 15 ⁇ m.
• Such a laminated polyethylene film is commercially available, for example, as 760FD (manufactured by Toray Synthetic Film Co., Ltd.).
• the sealant film 211 a film made of a mixture of ethylene-vinyl acetate copolymer (EVA) and polyethylene can be used.
• EVA ethylene-vinyl acetate copolymer
• polyethylene linear low density polyethylene
• the film thickness of this mixture is also preferably about 10-40 ⁇ m, more preferably about 20-30 ⁇ .
• the thickness of the hot melt layer is preferably from 10 to 50 / im, more preferably from 20 to 40 ⁇ .
• sealant film 211 a linear ethylene ' ⁇ -olefin copolymer obtained by copolymerizing ethylene and ⁇ -olefin having 3 to 18 carbon atoms [density (JIS 692): 0.870 to 0.910 g / cm 3, MFR QIS K6921, 190. C, 2.16 kg load): 100 g / 10 min] and a sealant film made of a resin composition containing polystyrene (JP-A-2004-26190).
• JP-A-2004-26190 a sealant film made of a resin composition containing polystyrene
• the sealant film 211 may be formed with a number of substantially parallel linear marks and / or a number of micropores.
• the adhesive layer is not particularly limited, but is preferably made of a film-like plastic having adhesive properties.
• a transparent adhesive should be used for the layers 202 and 203 (203a, 203b) for bonding the rollable plastic film 201 and the paper sheet 204.
• the transparent adhesive is not particularly limited as long as it has transparency.
• a polyurethane resin for example, trade name “Rock Bond RU-40”, manufactured by Rock Paint Co., Ltd.
• an epoxy resin for example, an acrylic resin, ethylene-butyl resin alcohol Copolymer resins (EVA), polybulacetal resins (eg, polybulformal, polybutyral (PVB resin), modified PVB, etc.), and Shiridani butyl resin.
• the material forming the partially easy peeling layer 23 is made of acrylic resin, polyamide resin, polyester resin, butyral resin, vinyl chloride vinyl acetate copolymer, ethylene-vinyl acetate copolymer, Nitrified cotton and the like. If necessary, a small amount of silicone or wax may be added.
• the easily peelable layer can be formed by printing an ink containing the above material on the paper sheet 204 or the PBT finolem 201.
• the partially easily peelable layer 23 may be formed by coating the upper or lower surface of the adhesive layer, but as shown in FIG. 5, a point-like easily peelable resin is uniformly distributed in the adhesive layer. Is also good.
• the partially easily peelable layer 23 must be accurately positioned with each of the half cuts 24a to 24e, 29, 283, 293 and 294, so that when forming the raw material of the lid 2 (laminated sheet 20), It is preferable to prepare the sheet 204 or the plastic film 201 by a method such as gravure printing in alignment with the printing layer.
• At least one of the curl plastic film 201, the rigid plastic film 207 and the sealant film 211 is provided with a number of substantially parallel linear marks by the method described below. May be formed.
• the depth of the linear marks be 1 to 40% of the thickness of each film, specifically 0.1 10 zm It is preferred that The width of the linear marks is preferably 0.110 ⁇ m, and the interval between the linear marks is preferably 10200 ⁇ m.
• a method disclosed in WO 03/091003 can be adopted.
• a continuous running film is pressed against a roll or plate having a large number of fine particles with Mohs hardness of 5 or more on its surface while sliding. This forms a number of substantially parallel linear traces on the film.
• the fine particles diamond fine particles are preferable.
• a means for pressing the film against the roll or plate a means for blowing air or a brush sliding on the film is preferable. Since the linear marks obtained by this method penetrate through the film, even if the PET film on which the linear marks are formed is used as the rigid plastic film 207, sufficient fragrance retention and gas barrier properties are obtained. Can be secured.
• the linear marks are preferably formed entirely on at least one side of each of the films 201, 207 and 211.
• each of the films 201, 207, and 211 is provided with a linear tearing property in one direction regardless of the orientation of the film itself. it can.
• a large number of fine holes are formed on the entire surface of at least one of the curl plastic film 201, the rigid plastic film 207 and the sealant film 211 by the method described below. Is also good.
• micropores is preferably that having a mean opening diameter and about 500 / cm 2 or more in the distribution density of 0.5- 100 mu m. If the distribution density of the micropores is less than about 500 / cm 2 , the tearability is insufficient. From the viewpoint of film strength, the distribution density of the fine pores is 1 X 10 3 - 1 X 10 4 cells / cm and more preferably 2 instrument 1 X 10 3 5 X 10 3 cells / cm 2 in which the particularly preferable.
• JP-A-2063411 and JP-A-2002-59487 can be adopted.
• a first roll (same as the above-mentioned linear mark forming roll) having a large number of fine particles having Mohs hardness of 5 or more having sharp corners and a flat surface are used. Since the film passes while receiving a uniform pressing force between the second roll and the smooth roll, a large number of fine holes are formed in the film.
• an iron-based roll, a stainless-based roll, a special steel roll, or the like provided with Ni plating, Cr plating, or the like can be used.
• an adhesive layer including the partially easily peelable layers 23a and 23b is formed on the upper surface of the long paper sheet 204, and an adhesive layer is formed on the lower surface, and the upper surface side is formed.
• a curable plastic film 201 is laminated on the lower surface, and a laminated film of a rigid plastic film 207, a light-shielding ink layer 208, and a sealant film 211 is laminated on the lower surface side.
• Each film 207 or 211 may be provided with a large number of substantially parallel linear marks and / or a large number of fine holes as necessary.
• the easy tear direction of each film 207 or 211 matches the longitudinal direction of the long paper sheet 204.
• the curl plastic film 201 When laminating the curl plastic film 201 on the paper sheet 204, the curl plastic film 201 is stretched in the MD direction within the elastic deformation region (11 to 13% elongation) and adhered to the paper sheet 204. Is preferred. Thereby, curl properties can be imparted to the laminated sheet 20.
• a tension of 10 to 20 kgf / m width may be applied to the curable plastic film 201.
• the tension applied to the curl plastic film 201 is 5 kgfZm or less.
• PBT is suitable as the resin that can be stretched so as to be elastically deformable.
• the laminated sheet 20 formed by adhering the curl plastic film 201 to the paper sheet 204 while applying tension thereto has curl property that is warped to the curl plastic film 201. Roll. As a result, the laminated sheet 20 does not substantially curl when unwound (of course, the laminated sheet 20 curls over time). Since the laminated sheet 20 remains flat for a while, there is no hindrance to the punching / heat sealing work on the lid 2. When the heat-sealed lid 2 is peeled off from the container body 1, the lid 2 is in a curled state.
• the curl shape can be stored in the laminated sheet 20 by utilizing the shape memory of the PBT.
• Write curl shape In order to produce the PBT laminated sheet 20, for example, two methods described in WO 2004/026577 can be adopted.
• the first method is (a) shaping (cold working) the laminated sheet 20 containing the PBT film at a temperature T equal to or lower than the glass transition temperature Tg of the PBT while keeping the laminated sheet 20 in a curled shape, and (b) ) Shaped laminated sheet
• G is transformed into a flat shape at a temperature T above Tg, and (c) cooled to a temperature T below Tg.
• the laminate sheet 20 containing the PBT film is subjected to a shaping treatment at a temperature T lower than a melting point of more than Tg while maintaining the curl shape.
• a laminated sheet 20 having a curl shape is produced by laminating with a film laminate including 204, and (b) the shaped laminated sheet 20 is cooled to a temperature T of Tg or less and fixed in a curl shape, and (c)
• the shaped laminate sheet 20 is deformed into a flat shape at a temperature T of more than Tg and less than 1 T, and (d) a temperature of Tg or less.
• the shape memory PBT laminated sheet 20 produced by these methods has a flat force, and then the punched / heat-sealed lid 2 has recovered its curl properties.
• a plurality of lids 2 can be manufactured at once. it can.
• the punching / half-cut processing itself can be performed by a known method.
• the direction of the pair of cuts 22a and 22b, the opening half cuts 24a and 24b, the U-shaped half cut 29, and the half cuts 283, 293 and 294 for forming the hot water outlet are aligned with the longitudinal direction of the long paper sheet. Punching and half-cutting may be performed simultaneously or continuously.
• the present invention has been described with reference to the drawings.
• the present invention is not limited thereto, and various changes can be made without changing the spirit of the present invention.
• the position of the partially easily peelable layer in the layer may be anywhere as long as one of the peeled layers has a large curl property.

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• 2004
  • 2004-07-23 CN CNA2004800216000A patent/CN1829642A/zh active Pending
  • 2004-07-23 JP JP2005512032A patent/JP4353944B2/ja not_active Expired - Fee Related
  • 2004-07-23 KR KR1020057025505A patent/KR20060039406A/ko not_active Application Discontinuation
  • 2004-07-23 WO PCT/JP2004/010494 patent/WO2005009868A1/ja active Application Filing
• 2009
  • 2009-06-29 JP JP2009154344A patent/JP2009263010A/ja active Pending

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