CN1829642A - Cover body for sealing container with excellent unsealing retainability - Google Patents

Cover body for sealing container with excellent unsealing retainability Download PDF

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Publication number
CN1829642A
CN1829642A CNA2004800216000A CN200480021600A CN1829642A CN 1829642 A CN1829642 A CN 1829642A CN A2004800216000 A CNA2004800216000 A CN A2004800216000A CN 200480021600 A CN200480021600 A CN 200480021600A CN 1829642 A CN1829642 A CN 1829642A
Authority
CN
China
Prior art keywords
described
lid
part
kaifeng
seal
Prior art date
Application number
CNA2004800216000A
Other languages
Chinese (zh)
Inventor
加川清二
Original Assignee
加川敦子
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP280364/2003 priority Critical
Priority to JP2003280364 priority
Application filed by 加川敦子 filed Critical 加川敦子
Publication of CN1829642A publication Critical patent/CN1829642A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D77/00Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10Container closures formed after filling
    • B65D77/20Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024Container 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
    • B65D77/2028Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2044Means 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
    • B65D77/2048Means 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
    • B65D77/2056Means 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
    • B65D77/206Means 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered 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
    • B32B27/10Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered 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
    • B32B7/04Interconnection of layers
    • B32B7/06Interconnection of layers permitting easy separation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2577/00Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10Container closures formed after filling
    • B65D2577/20Container closures formed after filling by applying separate lids or covers
    • B65D2577/2041Pull tabs
    • B65D2577/205Pull tabs integral with the closure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2577/00Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10Container closures formed after filling
    • B65D2577/20Container closures formed after filling by applying separate lids or covers
    • B65D2577/2075Lines of weakness or apertures
    • B65D2577/2091Lines of weakness or apertures in cover

Abstract

A cover body (2) for sealing a container having a paper sheet (204), a curling plastic layer (201), and partially easily peelable layers (23) and sealed to the container with the paper sheet (204) positioned on the lower side of the curling plastic layer (201), comprising an unsealing tab part (21) formed at the outer peripheral edge of the cover body and breaking start points (22a) and (22b) formed on both sides of the unsealing tab part (21), wherein the partially easily peelable layers (23) are formed on the outsides of extension lines (220a) and (220b) from the breaking start points in the breaking direction.

Description

The seal of vessel lid of Kaifeng retentivity excellence

Technical area

The retentivity that the present invention relates to break a seal is excellent and be applicable to the lid of the container of instant food etc.

Background technology

The lid of the container that the instant food of cup-shaped hand-pulled noodles or fast food fried flour and so on is accommodated preferably injects hot water easily when Kaifeng, simultaneously can sealing easily during keeping about 3 minutes.For easy injection hot water when breaking a seal, need the strong curling and maintenance Kaifeng state of lid in Kaifeng.In addition, for capping once more easily, (wing flap portion: flap) easily engage with residual of lid or container body, portion remains on sealing state with wing flap need to make the seal opening portion of lid.

About the Kaifeng retentivity, shown in Figure 31 and 32, open on the 1a of upper end flange portion that discloses the container body 1 of accommodating content in 2002-302154 number (patent documentation 1) the spy and to carry out leak free lid 200, it has Kaifeng with tab portion 21, tear starting point 22a, 22b in Kaifeng with the both sides setting of tab portion 21.Lid 200 is to be made of the laminated sheet that has the paper sheet of giving quiet retentivity (dead hold) and sealing film at least, so when mentioning Kaifeng with tab portion 21, shown in figure 32, lid 200 is torn along the extended line 220a, the 220b that tear starting point 22a, 22b, forms banded wing flap portion 3.Side edge part 3a, the 3b of side edge part 2a, the 2b of residual lid 2 and banded wing flap portion 3 exposes the face of tearing of paper sheet, so have zig-zag.Therefore, if after injecting hot water under the state that wing flap portion 3 holds up, seal wing flap portion 3 once more, then zig-zag side edge part 3a, the 3b engaging of zig-zag side edge part 2a, the 2b of lid 200 and banded wing flap portion 3, wing flap portion 3 is closely sealed once more.But, in the lid 200 as quiet retentivity give the layer have only paper sheet, so as can be known wing flap portion 3 hold up abundant inadequately sometimes.

The spy opens 2004-83099 (patent documentation 2) in order to ensure enough the holding up of wing flap portion 3, and discloses the lid 300 that constitutes by from the top laminated sheet that mainly has polybutylene terephthalate (PBT) film, paper sheet and sealing film in order.Lid 300 has the PBT film of quiet retentivity excellence, so compare with patent documentation 2 described lids, the crimpiness of wing flap portion 3 is more excellent.But, with regard to lid 300 because wing flap portion 3 has the part of side below the paper sheet on comprehensively, so, for example when lid 300 side below paper sheet has the high resin film of rigidity etc., as can be known wing flap portion 3 hold up abundant inadequately sometimes.

Patent documentation 1: the spy opens the 2002-302154 communique

Patent documentation 2: the spy opens the 2004-83099 communique

Summary of the invention

So, the objective of the invention is to, provide a kind of and have enough quiet retentivities so that the lid state that is used for keeping breaking a seal, that be applicable to the container of aspect food etc.

In view of above-mentioned purpose, the inventor concentrates on studies, found that, if have the plastic layer that wing flap portion that the Kaifeng by lid obtains has bigger crimpiness comprehensively, and easily peel ply of part is set according to the mode that does not have holostrome portion comprehensively, then can realize by Kaifeng retentivity, thereby expect the present invention than the excellence of major coil acquisition.

Promptly, the first seal of vessel lid of the present invention, has easily peel ply of paper sheet, crimpiness plastic layer and part, from above-mentioned crimpiness plastic layer, making above-mentioned paper sheet is that downside comes airtight container, wherein, have in Kaifeng of outer peripheral edges setting with tab portion with in above-mentioned Kaifeng and tear starting point with what the both sides of tab portion were provided with, the easy peel ply of above-mentioned part is arranged on the above-mentioned outside of tearing the direction extended line of tearing starting point.

The easy peel ply of above-mentioned part is preferably formed in from the above-mentioned starting point of tearing to the position that surmounts above-mentioned lid center.Preferably be provided with on above-mentioned lid and tear the stripping stop flag, the easy peel ply of above-mentioned part is formed on from the above-mentioned starting point of tearing to above-mentioned position of tearing the stripping stop flag.

Preferably along above-mentioned tear starting point respectively tear the direction extended line, be provided with Kaifeng hemisection groove at the downside of above-mentioned lid.Preferably separate with the above-mentioned starting point of tearing a little with the initiating terminal of hemisection groove in above-mentioned Kaifeng.Preferred above-mentioned lid is to be made of laminated sheet, and described laminated sheet has crimpiness plastic sheeting, paper sheet and a heat seal film in order at least from top, and above-mentioned Kaifeng arrives above-mentioned paper sheet in the above-mentioned laminated sheet at least with the hemisection groove.Above-mentioned Kaifeng preferably arrive with the hemisection groove above-mentioned paper sheet thickness at least about 30% the degree of depth.

The second seal of vessel lid of the present invention, has paper sheet, the crimpiness plastic layer, with the easy peel ply of part, compare with above-mentioned crimpiness plastic layer, make above-mentioned paper sheet more downside come airtight container, wherein, has the Kaifeng tab portion that is provided with in outer peripheral edges, use the hemisection groove with peeling off in the tab portion of above-mentioned Kaifeng side setting below tab portion, more lean on central side to be located at the hot water inlet formation ring-type hemisection groove of the downside of above-mentioned lid quarter with peeling off than above-mentioned tab portion with the hemisection groove, wherein, the easy peel ply of above-mentioned part is set up according to surrounding the mode of above-mentioned hot water inlet formation with ring-type hemisection groove.

The easy peel ply of above-mentioned part is preferably formed in from above-mentioned tab portion and peels off with the position of hemisection groove to the center that surmounts above-mentioned lid.Preferably be provided with on above-mentioned lid and tear the stripping stop flag, the easy peel ply of above-mentioned part is formed on from above-mentioned tab portion and peels off with the hemisection groove to above-mentioned position of tearing the stripping stop flag.

Be attached to the 3rd seal of vessel lid of the present invention that injects the container for fast food of separated material behind the hot water, except the feature of first or second lid, also have following feature.Promptly, this seal of vessel has separated material interruption-forming tab portion with lid, this separated material interruption-forming has a pair of crack with tab portion, and between above-mentioned a pair of crack, make the open end also carve the hemisection groove of a plurality of U of being essentially fonts of the downside that is located at above-mentioned lid towards the inboard, each U font hemisection groove is that the connecting portion by a pair of line part and two line parts constitutes, the front end of above-mentioned crack and above-mentioned U font hemisection groove all is positioned at the sealing of above-mentioned lid, between each straight line that above-mentioned separated material interruption-forming extends with the Kaifeng direction of tab portion, be provided with the separated material interruption-forming with the easy peel ply of part from the front end of the part of being surrounded and above-mentioned a pair of line part by above-mentioned U font hemisection groove.

Preferred above-mentioned lid easily to tear direction consistent in fact with the direction in above-mentioned crack, thereby, when pinching above-mentioned separated material interruption-forming with tab portion with above-mentioned lid when the said vesse main body is peeled off, torn from the above-mentioned lid of front end of above-mentioned crack and above-mentioned U font hemisection groove, the part of above-mentioned separated material interruption-forming side below the easy peel ply of part is residual under the state of the upper end flange portion that sticks to container body, forms a plurality of separated material mouths.

Above-mentioned U font hemisection groove preferably has below above-mentioned lid the degree of depth to the easy peel ply of above-mentioned part.Above-mentioned separated material interruption-forming preferably is set to the position of tearing stripping stop flag of above-mentioned separated material interruption-forming with tab portion from above-mentioned U font hemisection groove with the easy peel ply of part.

The a pair of straight line quality award from the ministry choosing of above-mentioned U font hemisection groove is tilted according to the mode that distolateral interval is narrow more more forward.Preferably the front end in above-mentioned a pair of crack is provided with a pair of line of the mode bevelled portion according to distolateral interval is broad more more forward.

The front end of a pair of line part of the front end in above-mentioned crack and above-mentioned U font hemisection groove is preferably placed at the outer circumferential side of line of centers of the sealing of above-mentioned lid.The position of front end in above-mentioned sealing of a pair of line part of the front end in above-mentioned crack and above-mentioned U font hemisection groove is more preferably in 30~50% scope of the width that begins above-mentioned sealing from periphery.

Preferably each front end from above-mentioned crack is provided with separated material interruption-forming hemisection groove to the straight line of Kaifeng direction extension.Preferably along the straight line that extends to the Kaifeng direction from each front end of above-mentioned U font hemisection groove, be provided with separated material interruption-forming hemisection groove at the downside of above-mentioned lid.

Be attached to the 4th seal of vessel lid of the present invention that injects the container for fast food of separated material behind the hot water, except the feature of first or second lid, also have following feature.Promptly, this seal of vessel lid is, (a) with above-mentioned Kaifeng with tab portion roughly on the position of subtend, the separated material interruption-forming of a plurality of rectangles is carved the downside that is located at lid with the hemisection groove, (b) the easy peel ply of above-mentioned part, the starting point of tearing from above-mentioned Kaifeng with tab portion is extended setting in the Kaifeng direction, connect and formation U font with tab portion area inside or the zone that surmounts the center of above-mentioned lid simultaneously in above-mentioned Kaifeng, and surround above-mentioned rectangle separated material interruption-forming hemisection groove, (c) in the border in zone that does not have the easy peel ply of above-mentioned U font part and zone with the easy peel ply of above-mentioned U font part, along with the direction border of quadrature roughly, Kaifeng, carve at the downside of lid and to establish layer and separate and use a hemisection groove.

Above-mentioned U font part easily peel ply preferably is configured to, and roughly becomes shape towards the central portion bending of lid in the border of quadrature with the Kaifeng direction in the border that does not have it.

First~the 4th seal of vessel preferably all has the polybutylene terephthalate film as above-mentioned crimpiness plastic layer with lid.

First~the 4th seal of vessel all is to begin to have crimpiness plastic layer, paper sheet, adhesive linkage, rigidity plastics film and sealing layer from upper face side with lid, and the easy peel ply of above-mentioned part preferably is set on the above-mentioned adhesive linkage.Above-mentioned stiffness films preferably is made of the pet film of the different double orientation of one-way orientation or the degree of orientation.The easy peel ply of above-mentioned part be preferably placed at the top of above-mentioned adhesive linkage or below, perhaps with above-mentioned adhesive linkage with the one side in.Preferably be provided with gleyness plastics (for example polyethylene) film in the both sides of the easy peel ply of above-mentioned part so that on release surface, can not expose paper sheet.

Seal of vessel lid of the present invention, on it is comprehensive, has plastic layer as follows, promptly the wing flap portion that obtains by Kaifeng in this plastic layer has than major coil, and does not have holostrome portion comprehensively, so can utilize the Kaifeng retentivity than major coil acquisition excellence.For this reason, wing flap portion can be remained on the state of holding up more greatly so that when Kaifeng, inject hot water easily.And then have part easily during peel ply when upper face side at paper sheet, and expose the zigzag fault face of paper sheet in the wing flap portion that Kaifeng obtains, can utilize the engaging of the zigzag fault face of paper sheet to obtain excellent leak tightness once more.For this reason, making wing flap portion be back to original position when insulation just can closely engage with lid, can keep sealing state once more infalliblely.So, have the easily lid of peel ply of part, have excellent Kaifeng retentivity and leak tightness once more simultaneously at the upper face side of paper sheet.

Lid of the present invention with such feature is suitable as and injects the aspect food lids such as cup face of taking food behind the hot water.Possess the containers for food use with lid of excellent crimpiness of the present invention, not only useful as the container of instant food, and also be useful as the small containers that is used to accommodate flavoring additives.

Description of drawings

Fig. 1 is that expression is attached to the block diagram of the seal of vessel of the one embodiment of the invention on the cup-shaped hand-pulled noodles container with lid.

Fig. 2 is the birds-eye view of the lid of presentation graphs 1.

Fig. 3 is the upward view of the lid of presentation graphs 1.

Fig. 4 is the A-A amplification sectional view of presentation graphs 2.

Fig. 5 is the amplification sectional view of the part X of presentation graphs 4.

Fig. 6 is the B-B amplification sectional view of presentation graphs 5.

Fig. 7 is the amplification sectional view of other layers structure of expression lid.

Fig. 8 is that expression makes the lid that is attached to the Fig. 1 on the cup-shaped hand-pulled noodles container be in the block diagram of the state in Kaifeng.

Fig. 9 is that expression makes behind the lid Kaifeng that is attached to the Fig. 1 on the cup-shaped hand-pulled noodles container block diagram of leak free state once more.

Figure 10 is the birds-eye view of the lid of expression other embodiment of the present invention.

Figure 11 is the birds-eye view that the wing flap portion of the lid Kaifeng back formation of expression Figure 10 launches 180 ° state.

Figure 12 is the C-C amplification sectional view of expression Figure 10.

Figure 13 is the birds-eye view of the lid of expression other embodiment of the present invention.

Figure 14 is the upward view of the lid of expression Figure 13.

Figure 15 is near the separated material interruption-forming of the lid of the expression Figure 13 part enlarged drawing of tab portion.

Figure 16 is near the separated material interruption-forming of the lid of the expression Figure 13 another part enlarged drawing of tab portion.

Figure 17 is the amplification sectional view of the D-D of expression Figure 13.

Figure 18 is the amplification sectional view of the E-E of expression Figure 13.

Figure 19 is that expression makes the separated material interruption-forming of Figure 13 be in the part enlarged drawing of the state in Kaifeng with tab portion.

Figure 20 is the birds-eye view of the lid of expression other embodiment of the present invention.

Figure 21 is the upward view of the lid of expression Figure 20.

Figure 22 is the F-F amplification sectional view of expression Figure 20.

Figure 23 is the G-G amplification sectional view of expression Figure 20.

Figure 24 is the block diagram that the state that is attached to the wing flap portion that forms behind the lid Kaifeng of fast food fried flour with the Figure 20 on the container is removed in expression.

Figure 25 is the block diagram that expression is attached to the lid of other embodiment of the present invention on the cup-shaped hand-pulled noodles container.

Figure 26 is the block diagram that expression is attached to the lid of other embodiment of the present invention on the cup-shaped hand-pulled noodles container.

Figure 27 is that expression is attached to the block diagram of fast food fried flour with the lid of the other embodiments of the invention on the container.

Figure 28 is the amplification sectional view of other layers structure of expression lid of the present invention.

Figure 29 is the amplification sectional view of other layers structure of expression lid of the present invention.

Figure 30 is the birds-eye view of expression appearance of a plurality of lids of punching press from the laminated sheet.

Figure 31 is the block diagram that expression is attached to the example of the lid in the past on the cup-shaped hand-pulled noodles container.

Figure 32 is the block diagram that expression is attached to the state that the lid of the Figure 31 on the cup-shaped hand-pulled noodles container broken a seal.

Among the figure: the 1-container body, 1a-upper end flange portion, 2,200, the 300-lid, 2a, 2b, the zigzag fault face of 2c-paper sheet, the 20-laminated sheet, 201-crimpiness plastic sheeting, 202,203,203a, 203b, 205,206,206a, 206b, 209, the 210-adhesive linkage, the 204-paper sheet, 207-rigidity plastics film, 208-light-proofness ink lay, the 211-sealing film, the 212-aluminium foil, 21-Kaifeng tab portion, 22a, 22b-tears starting point (crack), 220a, 220b-tears the extended line of starting point, the slot-shaped through hole of 221-, 222-uses tab portion, 23 in other Kaifeng, 23a, 23b, the 23c-part is peel ply easily, the 230-border, 24a, 24b-Kaifeng hemisection groove, 240a, 240b-Kaifeng forms with ring-type hemisection groove with the initiating terminal of hemisection groove, 24c-hot water inlet, and the 24d-tab portion is peeled off and used the hemisection groove, the 24e-layer separates uses the hemisection groove, the 25-sealing, the line of centers of 25a-sealing, 26, the 260-mark, 27-separated material interruption-forming tab portion, 28a, the 28b-crack, 280a, the line part in 280b-crack, 28a, the front end rake in 28b-crack, the 282-extended line, 283-separated material interruption-forming hemisection groove, 29-U font hemisection groove, 290-connecting portion, the 291-rake, the 292-extended line, 293-separated material interruption-forming hemisection groove, 293 '-separated material interruption-forming initiating terminal of hemisection groove, 294-separated material interruption-forming rectangle hemisection groove, 3-wing flap portion, the holostrome portion of 31-wing flap portion, 32,32a, 32b-crimpiness part, 3a, 3b, the zigzag fault face of 3c-paper sheet layer, 10-is near part (hatching part) the 11-strap portion that the separated material interruption-forming is peeled off with tab portion, 12-separated material mouth, 125-fissility resin.

The specific embodiment

Describe with reference to the structure of accompanying drawing lid of the present invention, unless otherwise specified, in the position additional phase identical reference numbering together with the position shown in Figure 31 and 32.Therefore, please refer to the explanation of the lid shown in Figure 31 and 32.

[1] structure of lid

(1) first lid

Fig. 1~3 expressions, first lid of the present invention.Be attached to the lid 2 on the cup-shaped hand-pulled noodles container 1, have Kaifeng with tab portion 21, tear starting point 22a, 22b in Kaifeng with the setting of the both sides of tab portion 21.In a pair of arranged outside of tearing direction extended line 220a, 220b of tearing starting point 22a, 22b part easily peel ply 23a, 23b are arranged.Tearing starting point 22a, 22b can be the crack, can also be indentation.In the present embodiment, be that example is carried out following explanation with the crack as the situation of tearing starting point 22a, 22b.

The interval d of a pair of crack 22a, 22b 1Can suitably set according to the kind of content.For example, being to inject under the situation of cup face of hot water, if make the external diameter of the 1a of upper end flange portion of container body 1 be about 10cm, the interval d of crack 22a, 22b then 1Preferably be about 4~8cm.Wherein, lid 2 is broken a seal on the feed the time comprehensively, can on subtend position, be wholely set another Kaifeng tab portion on the lid 2, in outer peripheral edges.

As shown in Figure 2, the front end of a pair of crack 22a, 22b is positioned at the sealing 25 of lid 2 (with the thermosealed part of the 1a of upper end flange portion of container body 1), so that the sealing content.

Continuous laminated sheet 20 is punched and the about 1mm of tolerance when at a high speed making lid 2, so the front end of a pair of crack 22a, 22b is preferably placed at the more lateral of the 25a of Central Line of the sealing 25 of lid 2, more preferably from outside in 30~50% the scope of width of thoughtful sealing 25, particularly preferably in from outward thoughtfully in 30~40% of the width of sealing 25 the scope.

Part easy peel ply 23a, 23b are preferably formed to the position of the center O that surmounts lid 2.For example as shown in Figure 2, easy peel ply 23a, 23b of part is at least to the position of tearing stripping stop flag 26.

As shown in Figure 3, preferably along extended line 220a, 220b, the downside that is located at lid 2 is carved in Kaifeng with hemisection groove 24a, 24b.By Kaifeng being set, make tearing of lid 2 become easy with hemisection groove 24a, 24b.But, a pair of crack 22a, 22b and Kaifeng must separate a little with initiating terminal 240a, the 240b of hemisection groove 24a, 24b.This is because lid 2 must have not a particle of heat seal with gap with container body 1 before Kaifeng.A pair of crack 22a, 22b and Kaifeng with initiating terminal 240a, the 240b of hemisection groove 24a, 24b apart from d 2Be preferably 1~10mm, more preferably 2~5mm.Kaifeng is preferably formed to the position of the center O that surmounts lid 2 with hemisection groove 24a, 24b.For example, as shown in Figure 3, Kaifeng is formed up to the position of tearing stripping stop flag 26 with hemisection groove 24a, 24b.

Layer formation to lid 2 describes.In example shown in Figure 4, lid 2 is by crimpiness plastics (PBT) film 201, be extruded stacked polyethylene layer 203a, adhesive linkage 202, be extruded stacked polyethylene layer 203b, paper sheet 204, adhesive linkage 205, be extruded stacked polyethylene layer 206, rigidity plastics (PET) film 207, light-proofness ink lay 208, adhesive linkage 209, be extruded stacked polyethylene layer 210 and sealing layer 211 constitutes.Part easily peel ply 23a, 23b forms as the part of adhesive linkage 202.Kaifeng hemisection groove 24a, 24b perforation sealing layer 211, polyethylene layer 210, adhesive linkage 209, light-proofness ink lay 208, rigidity plastics film 207, polyethylene layer 206, adhesive linkage 205 below lid 2, and the part of arrival paper sheet 204.Kaifeng preferably arrives the thickness d that is equivalent to paper sheet 204 with hemisection groove 24a, 24b 3At least about 30% depth d 4Wherein, the stitching along extended line 220a, 220b can only be set on paper sheet 22, replace Kaifeng hemisection groove 24a, 24b.

In example shown in Figure 5, between a pair of polyethylene layer 203a, the 203b between crimpiness plastics (PBT) film 201 and the paper sheet 204, be formed with adhesive linkage 202, the part of adhesive linkage 202 becomes easily peel ply 23b of part.As shown in Figure 6, part easily the fissility resin 125 of peel ply 23b with point-like be evenly distributed on structure on the adhesive linkage 202.But part easily peel ply is not limited to this, can be the upper face side of adhesive linkage 202 or below side be coated with into the fissility resin bed of film like.

Fig. 7 represents other formations of lid 2 of the present invention.In this embodiment, easy peel ply 23a, 23b of part is formed as the part of the adhesive linkage 205 that is provided with between a pair of polyethylene layer 206a, 206b between paper sheet 204 and rigidity plastics (PET) film 207.Kaifeng arrives adhesive linkage 205 with hemisection groove 24a, 24b perforation sealing layer 211, polyethylene layer 210, adhesive linkage 209, light-proofness ink lay 208, rigidity plastics film 207, polyethylene layer 206b below lid 2.

When tab portion 21 is used in the Kaifeng of mentioning the lid 2 that is made of laminated sheet shown in Figure 4 20, as shown in Figure 8, lid 2 is peeled off from the 1a of upper end flange portion of container 1, torn along extended line 220a, 220b, easily peel ply 23a, 23b separate the part of crimpiness plastics (PBT) film 201 side below paper sheet 204 by part.Because tear paper sheet 204,, also form jagged area of fracture 3a, 3b in wing flap portion 3 simultaneously so form jagged area of fracture 2a, 2b in a side of residual lid 2 at extended line 220a, 220b place.For this reason, as shown in Figure 9, when sealing wing flap portion 3 once more, jagged area of fracture 2a, the 2b of lid 2 and jagged area of fracture 3a, the 3b of wing flap portion 3 closely engage, and infallible ground seals wing flap portion 3 once more.

When rigidity plastics (PET) film 207 of the laminated sheet 20 that constitutes lid 2 has easy-to-rupture, can omit Kaifeng hemisection groove 24a, 24b.This be because, when rigidity plastics (PET) film 207 of the laminated sheet 20 that constitutes lid 2 has easy-to-rupture, by make its easily tear direction and lid 2 to tear direction essence consistent, when pinching Kaifeng when peeling off lid 2 with tab portion 21, lid 2 from a pair of crack 22a, 22b along easily tear the direction quilt easily rectilinearity tear.

In addition, in the easy zone of peel ply 23a, 23b of part, in fact only adhere to by crimpiness plastic sheeting 201 in the both sides of the holostrome portion 31 of wing flap portion 3 and to constitute crimpiness part 32a, 32b, so the crimpiness of wing flap portion 3 is very big.Therefore, under the state in lid 2 Kaifeng, cup-shaped hand-pulled noodles container 1 has the hot water of injection and required enough width.Thus, has the easily lid 2 of peel ply 23a, 23b of part, in Kaifeng retentivity and excellence aspect two of the leak tightnesss once more at the upper face side of paper sheet 204.

(2) second lids

Figure 10 and 11 expressions, second lid of the present invention.In Figure 10 and 11, additional phase reference numbering together on parts identical or part with Fig. 1~3.Be attached to the lid 2 on the cup-shaped hand-pulled noodles container 1, have: Kaifeng is peeled off with hemisection groove 24d, peeling off than tab portion with hemisection groove 24d with the tab portion of tab portion 21, side setting below tab portion 21 and more is located at the hot water inlet formation of downside of lid 2 quarter with ring-type hemisection groove 24c and the easy peel ply 23 of part that is provided with the mode of ring-type hemisection groove 24c with the formation of encirclement hot water inlet by central side.

The formation of hot water inlet has the needed enough sizes of the hot water of injection with ring-type hemisection groove 24c and gets final product.Be to form the hot water inlet, the hot water inlet forms and forms ring-type with ring-type hemisection groove 24c and get final product, and except elliptical shape as shown in figure 10, can also be rectangle, trapezoidal etc.

The easy peel ply 23 of part is preferably formed in from being arranged at Kaifeng and peels off the position to the center O that surmounts lid 2 with hemisection groove 24d with the tab portion of tab portion 21.For example, as shown in figure 10, part easily peel ply 23 is formed into the position of tearing stripping stop flag 26 at least.

In example shown in Figure 12, lid 2 has the layer structure that is same as lid shown in Figure 4, part is peel ply 23 easily, as the part formation of the adhesive linkage 202 between a pair of polyethylene layer 203a, the 203b between crimpiness plastic sheeting 201 and the paper sheet 204.The hot water inlet forms with ring-type hemisection groove 24c and tab portion and peels off with hemisection groove 24d, perforation sealing layer 211, polyethylene layer 210, adhesive linkage 209, light-proofness ink lay 208, rigidity plastics film 207, polyethylene layer 206b, adhesive linkage 205, paper sheet 204 below lid 2 arrive adhesive linkage 202.

For this reason, when mentioning Kaifeng, as shown in figure 11, the part of crimpiness plastics (PBT) film 201 side below paper sheet 204 is separated by the easy peel ply 23 of part with tab portion 21.Can form jagged area of fracture 2c in residual lid 2 one sides, also form jagged area of fracture 3c in wing flap portion 3 simultaneously.So, can seal wing flap portion 3 once more in the same infallible ground with first lid.

In addition, the same with first lid, in the zone of the easy peel ply 23c of part, constitute crimpiness part 32 in fact only the adhering to by crimpiness plastic sheeting 201 of holostrome portion 31 of wing flap portion 3 on every side, so the crimpiness of wing flap portion 32 is very big.

(3) the 3rd lids

Figure 13~16 expressions the 3rd lid of the present invention.In Figure 13~16, additional phase reference numbering together on parts identical or part with Fig. 1~3.This lid 2 (a) roughly has separated material interruption-forming usefulness tab portion 27 on the position of subtend with Kaifeng with tab portion 21, (b) has a pair of crack 28a in tab portion 27,28b, with at two crack 28a, between the 28b roughly uniformly-spaced to carve the hemisection groove 29 of a plurality of U of being essentially fonts of the downside be located at lid 2, (c) and in pair of angled portion 291 from the partial sum U font hemisection groove 29 that surrounded by U font hemisection groove 29,291 front end, to separated material interruption-forming each straight line 292 with the Kaifeng direction extension of tab portion 27, between 292, be provided with separated material interruption-forming easily peel ply 23c of part, in addition, identical with the first lid essence, be attached on the fast food fried flour container 1.

Each crack 28a, 28b can be rectilinear forms, but in order to improve tearing property, preferably are made of each line part 280a, 280b of extending from the outer peripheral edges of lid 2 and direction bevelled each leading section 281a, 281b of opening to expansion from line part 280a, 280b.

The hemisection groove 29 of each U font preferably is made of narrow more bevelled pair of angled portion 291,291 of its spacing more forward and their connecting portion 290, and tearing property thus, is improved towards inboard and form the U font in fact in the open end.But, pair of angled portion 291,291 can be parallel rectilinear form.The quantity of U font hemisection groove 29 is preferably 1~6, more preferably 2~5.

As shown in figure 15, in order to ensure enough heat seals, front end rake 281a, 281b and rake 291,291 all must be positioned at the sealing 25 of lid 2.

Continuous laminated sheet 20 is punched and tolerance when at a high speed making lid 2 is about 1mm, so front end of the rake 291,291 of the front end of front end rake 281a, the 281b of a pair of crack 28a, 28b and each U font hemisection groove 29, preferably at the more outer circumferential side of the 25a of Central Line of the sealing 25 of lid 2, more preferably at 25 width d from the outer circumferential side to the sealing 1030~50% scope in, particularly preferably in from outside in 30~40% the scope of width of thoughtful sealing 25.In addition, when pinching the separated material interruption-forming and peel off lid 2 with tab portion 27, never damage the viewpoint of the close property of strap portion 11, the connecting portion 290 of the hemisection groove 29 of U font is preferably placed in the sealing 25.

In order to shorten the separated material time, preferably enlarge the width d of separated material mouth 12 as far as possible 11, so since, the area of the cap portion of peeling off from sealing 25 increases, the Kaifeng resistance increases.If Kaifeng resistance maximum when beginning to peel off bigger with the stripping area of sealing 25, can be felt bigger initial stage Kaifeng resistance.Therefore, as shown in figure 15, by expanding acclivitous each leading section 281a, 281b of evolution and the narrow more at interval rake 291,291 of forward end more, increase gradually from the stripping area of sealing 25, so can not feel and bigger initial stage resistance can successfully carry out the Kaifeng of separated material interruption-forming with tab portion 27.

The length of each front end rake 281a, 281b and each rake 291 is preferably 0.5~3mm.As shown in figure 16, the angle θ of each front end rake 281a, 281b and line part 280a, 280b, all be preferably 120 °~170 ° with the angle θ ' of rake 291 and straight line 292, can be identical.If their angle is outside this scope,,, also might easily tears the direction straight line and tear along this from each front end rake 281a, 281b and each rake 291 even lid 2 has easy-to-rupture.

Interval d between the front end of rake 291,291 12Preferably than the width d of U font hemisection groove 29 6Narrow 0.5~3mm.Specifically, the instant food in container is under the situation of fried flour, the interval d of the front end of rake 291,291 12Be preferably 6~8mm, the width d of separated material mouth 12 11Be preferably 4~7mm.

In the example shown in Figure 13~16, a pair of crack 22a, the width d of 22b that are provided with the both sides of tab portion 21 in Kaifeng 5Can suitably set according to the kind of content.For example, being to inject under the situation of cup face of hot water, if make the external diameter of the 1a of upper end flange portion of container body 1 be about 18cm, the interval d of crack 22a, 22b then 5Preferably be about 9~15cm.In addition, the width d of U font hemisection groove 29 6, each crack 28a, 28b and U font hemisection groove 29 interval d 7, and U font hemisection groove 29 interval d each other 8, preferably be respectively 3~10mm.

As shown in figure 13, the straight line 282,282 that preferably extends at each front end from crack 28a, 28b is carved and is established separated material interruption-forming hemisection groove 283.And then as shown in figure 14, preferably the straight line 292 that extends at the front end from each rake 291 of U font hemisection groove 29 is carved and is established the separated material interruption-forming with hemisection groove 293.By establishing separated material interruption-forming hemisection groove 283,293 quarter, improve the tearing property of lid 2.But, as mentioned above, from the viewpoint of the leak tightness of lid 2, as shown in figure 15, the front end of each rake 291 of U font hemisection groove 29 and separated material interruption-forming must be kept apart in sealing 25 a little with the initiating terminal 293 ' of hemisection groove 293.Each front end of each rake 291,291 and separated material interruption-forming with the initiating terminal 293 ' of hemisection groove 293 apart from d 9Be preferably 1~10mm, more preferably 2~5mm.Each separated material interruption-forming is number cm with the terminal preferred distance upper end flange portion of hemisection groove 283,293.

Form under the situation of lids 2 at the laminated sheet by having tearing property 20, preferably make its easily tear direction and lid 2 to tear direction essence consistent.Thus, when pinching the separated material interruption-forming and peel off lid 2 with tab portion 27, lid 2 is torn by rectilinearity easily along easily tearing direction from the front end of the front end of a pair of crack 28a, 28b and each U font hemisection groove 29.In addition, have at lid 2 under the situation of easy-to-rupture, can omit separated material interruption-forming hemisection groove 283,293.

In example shown in Figure 17, lid 2 has the layer structure identical with laminated sheet shown in Figure 4 20, part is peel ply 23c easily, as the part formation of the adhesive linkage 205 between a pair of polyethylene layer 206a, the 206b between paper sheet 204 and the rigidity plastics film 207.U font hemisection groove 29 below lid 2 perforation sealing layer 211, be extruded stacked polyethylene layer 210, adhesive linkage 209, light-proofness ink lay 208, rigidity plastics (PET) film 207 and be extruded stacked polyethylene layer 206, arrive adhesive linkage 205.

As shown in figure 18, the separated material interruption-forming preferably reaches the parts of paper sheet 204 with hemisection groove 283 above lid 2, more preferably arrive the thickness that is equivalent to paper sheet 204 at least about 30% the degree of depth.The separated material interruption-forming is identical with U font hemisection groove 29 with hemisection groove 293, preferably arrival adhesive linkage 205 below lid 2.

When pinching the separated material interruption-forming with tab portion 27 with lid 2 when container body 1 strips down and only peels off with the part 10 shown in the hatching, as shown in figure 19, obtain a plurality of separated material mouths 12, with regard to the strap portion 11 that constitutes by part of being surrounded and prolongation thereof by U font hemisection groove 29, by the easy peel ply 23c of part, the part of side sticks under the state of the 1a of upper end flange portion of container body 1 residual below rigidity plastics (PET) film 207.

As shown in figure 15, on lid 2, preferably, the mark 260 of expression stripping borderline is set instant food (fried flour etc.) in the container being spilt and can effectively carrying out on the position of separated material.The length that the optimum seeking site of mark 260 is configured to separated material mouth 12 is about 1~5cm.Part easily peel ply 23c length can with the same length of the separated material mouth 12 that should form.In addition, with regard to the 3rd lid,, can possess the feature of second lid about the Kaifeng maintenance function of lid.

(4) the 4th lids

Figure 20 and 21 expressions the 4th lid of the present invention.In Figure 20 and 21, additional phase reference numbering together on parts identical or part with Fig. 1~3.This lid 2 (a) with Kaifeng with tab portion 21 roughly on the position of subtend, a plurality of separated material interruption-formings are located at the downside of lid 2 294 quarters with rectangle hemisection groove, (b) the easy peel ply 23 of part is with extended line 220a, 220b is that extend in the Kaifeng direction from the starting point of tearing of tab portion 21 on the border, simultaneously be connected to form the U font in the zone of the center O that surmounts lid 2, and encirclement separated material interruption-forming rectangle hemisection groove 294, (c) do not have the easily zone of peel ply 23 of U font part, with have U font part easily in the border in the zone of peel ply 23, along with the direction border 230 of quadrature roughly, Kaifeng, carve at the downside of lid 2 and to be provided with layer and to separate with a hemisection groove 24e, in addition, identical with the first lid essence.As shown in figure 20, part easily peel ply 23 preferably be provided with according to the mode that the border 230 with the zone that does not have it becomes towards the shape of the central portion bending of lid 2.

Part easily peel ply 23 is not to be defined as to connect in the position of the center O that surmounts lid 2, can the area inside (zone from tab portion 21 to center O) with tab portion 21 connect in Kaifeng yet.

In example shown in Figure 22, lid 2 has the layer identical with laminated sheet shown in Figure 4 20 and constitutes, part is peel ply 23c easily, as the part formation of the adhesive linkage 202 between a pair of polyethylene layer 203a, the 203b between crimpiness plastic sheeting 201 and the paper sheet 204.Layer separates perforation sealing layer 211, polyethylene layer 210, adhesive linkage 209, light-proofness ink lay 208, rigidity plastics film 207 and polyethylene layer 206, adhesive linkage 205, paper sheet 204 below lid 2 with hemisection groove 24e, arrives adhesive linkage 202.In addition, shown in Figure 22 and 23, separated material interruption-forming also arrival adhesive linkage 202 below lid 2 of rectangle hemisection groove 294.

For this reason, on the feed under the situation of fried flour, under the state that keeps lid 2 Kaifeng, inject hot water, then under the state of closure body 2, keep specified time, pinching Kaifeng then and further drawing back lid 2 in the Kaifeng direction with tab portion 21, at this moment, as shown in figure 24 by the easy peel ply 23 of part, crimpiness plastic sheeting 201 separates fully from the part of the more following side of paper sheet 204, can form separated material mouth 12.

Wherein, with regard to the 4th lid,, can possess the feature of second lid about the Kaifeng maintenance function of lid 2.

(5) other examples

The shape of first~the 4th lid is not limited to illustrated embodiment, as long as do not change purport of the present invention, can apply various changes.

Figure 25 is illustrated in to break a seal with the lid 2 that is provided with slot-shaped through hole 221 in the tab portion 21, on the position of the outer rim that is equivalent to the 1a of upper end flange portion.This lid 2 is except slot-shaped through hole 221, and is identical with first lid.In the container that possesses this lid 2, when making the lid 2 that has broken a seal turn back to original locked position of coupler, engaging has the 1a of upper end flange portion on slot-shaped through hole 221, so leak tightness improves once more.The crack can be set replace slot-shaped through hole 221.

Figure 26 is illustrated in the example that is provided with slot-shaped through hole 221 and other tab portion 222 on the lid 2.This lid is except slot-shaped through hole 221 and tab portion 222, and is identical with first lid.By engaging tab portion 222 on slot-shaped through hole 221, the Kaifeng that can keep lid 2.

Lid 2 shown in Figure 27 is attached to square fast food fried flour with on the container 1, and Kaifeng is arranged on bight on the diagonal line roughly with tab portion 21 and separated material interruption-forming with tab portion 27.The structure of lid 2 is identical with the 3rd lid.

Heat extraction water function about third and fourth lid, open as described in the flat 2000-109141 as the spy, its formation can be that easily peel ply of part is set in the zone with separated material mouth, carves to be set at the downside of lid 2 to reach the easily a plurality of circular hemisection groove used of the separated material interruption-forming of peel ply of part.

[the layer structure of lid]

The layer of lid 2 of the present invention is constituted unqualified, the preferred layer structure example except Fig. 4 and example shown in Figure 7 described.Laminated sheet 20 shown in Figure 28 is not except having rigidity plastics film 207, and is identical with laminated sheet 20 shown in Figure 4.Give layer as light-proofness in the laminated sheet 20 shown in Figure 29, replace light-proofness ink lay 208 with aluminium foil 212, in addition, identical with example shown in Figure 4.

Below, each layer is described in detail.

(1) crimpiness plastic sheeting

Lid 2 of the present invention has crimpiness plastic sheeting 201 in the outside of paper sheet 204.As crimpiness plastic sheeting 201, the preferred polyester film.As mylar, can enumerate the film that constitutes by polybutylene terephthalate (PBT), polyethylene terephthalate (PET), PEN (PEN), PBN (PBN) etc.PBT film and PET film can obtain with low price as commercially available product.Particularly the PBT film is very excellent aspect quiet retentivity, fragrance protectiveness, gas barrier property and resistance to effect of heat, so preferred.

The PBT film is basically by 1, the saturated polyester film that 4-butylene glycols and terephthalic acid constitute.But, do not influencing in the scope of rerum naturas such as heat-shrinkable, can contain 1, diol component beyond the 4-butylene glycols or the carboxylic acid composition beyond the terephthalic acid as copolymer composition.As such diol component, for example can enumerate ethylene glycol, diethylene-glycol, neopentyl glycol, 1,4-cyclohexane methanol etc.In addition, as the dicarboxylic acid composition, for example, can enumerate isophthalic acid, decanedioic acid, adipic acid, azelaic acid, succinate etc.As the concrete example of the PBT resin that constitutes the PBT film, can enumerate the homopolymerization PBT resin that for example is called " ト レ コ Application " by east beautiful (strain) commercially available commodity.

The PET film is the saturated polyester film that is made of ethylene glycol and terephthalic acid basically.But, in the scope of the characteristic that does not influence the PET film, can contain ethylene glycol diol component or terephthalic acid carboxylic acid composition in addition in addition as copolymer composition.As such diol component, for example can enumerate diethylene-glycol, 1,4-butylene glycols, neopentyl glycol, 1,4-cyclohexane methanols etc. in addition, as the carboxylic acid composition, for example, can be enumerated isophthalic acid, decanedioic acid, adipic acid, azelaic acid, succinate etc.The PET film is used as biaxially oriented film usually and sells, and for example can enumerate " the Le ミ ラ one " in east beautiful (strain), " ester film spins in Japan " of Japan's weaving (strain) or " the エ Application Block レ Star ト PC " of ユ ニ チ カ (strain) etc.

Mylar is not limited to the material that only is made of single resinous principle, can be made of the various kinds of resin composition.As the combination of resinous principle, except the combination of multiple alkide resin, can also enumerate in the scope of not damaging its characteristic the material that has added other thermoplastic base resins to one or more alkide resin.As other thermoplastic base resins, can enumerate polyphenylene sulfide (PPS), polyamide (PA), polyimide (PI), polyamidoimide (PAI), polyethersulfone (PES), polyetheretherketone (PEEK), polycarbonate, polyurethane, fluorine resin, polyolefin such as polyethylene, polypropylene, polyvinylchloride, thermoplastic elastomer etc.For example, when using the PBT film,, then can improve the film forming when making film, can obtain the PBT film of the excellent in uniformity of thickness if contain polyethylene in the PBT resin as film raw material as crimpiness plastic sheeting 201.When containing other thermoplastic base resins, with regard to its ratio, be preferably 5~20 quality % when whole mylar is made as 100 quality %, more preferably 5~15 quality % are preferably 5~10 quality % especially.Therefore, unless otherwise specified, the term of Shi Yonging " PET film " and " PBT film " are interpreted as not only being meant the material of PET or these single compositions of PBT in this manual, also comprise the composite that is made of PET or other thermoplastic base resins of PBT+.

According to the different purposes of container for fast food, can suitably contain additives such as colorants such as stabilizers such as plasticizer, antioxidant or ultraviolet absorbent, antistatic agent, inhibiter, dyestuff or pigment, the lubricant that is used to improve liquidity, inorganic filler in the crimpiness plastic sheeting 201.

Consider that from practical aspect the thickness of crimpiness plastic sheeting 201 is preferably about 5~50 μ m.If the thickness that will make crimpiness plastic sheeting 201 is difficult to realize less than about 5 μ m technically.In addition, when the thickness of crimpiness plastic sheeting 201 surpasses about 50 μ m, cost up.Be preferably 10~30 μ m.The PBT film of about 5~50 μ m of thickness has sufficient quiet retentivity, fragrance protectiveness and gas barrier property.

The percent thermal shrinkage of PBT film all is below 2% on MD (operating direction) and TD (Width) preferably.Percent thermal shrinkage was measured by the PBT film is heated down at 150 ℃ in 10 minutes.Percent thermal shrinkage is the PBT film below 2%, can inflate the shaping manufactured by air cooling.As method, can enumerate the method for for example in WO2004/026558, putting down in writing by air cooling inflation shaping manufactured PBT film.

If form many parallel in fact linear traces and/or many minute apertures on crimpiness plastic sheeting 201, then the straight line easy-to-rupture of lid 2 improves.

(2) transparent resin overlay

When on PBT film 201, the transparent resin overlay being set, the fine surface irregularity in the PBT film 201 be absorbed and obtain the transparency and high-resolution.For this reason, it is beautiful and clear to see through the printed layers that PBT film 201 sees.Transparent resin can be water-soluble or water-insoluble in any, but from can be not with an organic solvent viewpoint, preferred water miscible resin.As water-soluble transparent resin, for example can enumerate polyvinyl alcohol, cellulose-based poly-mer, polyvinyl pyrrolidone, carbowax, polyacrylamide etc.Polyvinyl alcohol can pass through anion, cation, acetal etc. modification takes place, and in addition, can be ethene-vinyl alcohol copolymer, the partly-hydrolysed thing of polyvinyl acetate etc.The polymeric level of polyvinyl alcohol is preferably below 1000.

As water-insoluble transparent resin, can enumerate acrylic resin, urethane resin, epoxy resin, polystyrene resin, ultra-violet solidified unsaturated acrylic resin, ultra-violet solidified beta-unsaturated esters resin, polycarbonate resin etc.

Thickness to the transparent resin overlay is unqualified, but is preferably 1~5 μ m, more preferably 2~4 μ m.When the thickness of transparent resin overlay during less than 1 μ m, the raising of the leglibility of printing is abundant inadequately, in addition, if surpass 5 μ m, cost up.

(3) paper sheet

Paper sheet 204 is as layer performance function of giving of quiet retentivity.Kind to paper is unqualified, also comprises synthetic paper.The weight of the unit area of paper sheet 204 preferably is about 60~120g/m 2, be more preferably 75~110g/m 2If the weight of the unit area of paper sheet 204 is less than about 60g/m 2, a little less than then the deflection of paper sheet can be undue, can not pay sufficient quiet retentivity.On the other hand, if the weight of the unit area of paper sheet 204 surpasses about 120g/m 2, then only can cause the increase of cost, can further not improve quiet retentivity.

(4) rigidity plastics film

Rigidity plastics film 207 preferably is made of the PET film.In order to improve the straight line easy-to-rupture of lid 2,, preferably use the PET film of the different double orientation of the one-way orientation or the degree of orientation as the PET film.The different double orientation PET film of the degree of orientation as " エ Application Block レ Star ト PC " (ユ ニ チ カ (strain)) by commercially available.In addition, when forming a plurality of parallel in fact linear traces and/or many minute apertures on rigidity plastics film 207, the straight line easy-to-rupture of lid 2 improves.The direction of the straight line easy-to-rupture of lid 2 is preferably parallel with hemisection groove 24a, 24b with Kaifeng.Its thickness can suit to set as required.

(5) light-proofness is given layer

Because daylight or ultraviolet ray cause the rotten of instant food, lid 2 has light-proofness ink lay 208 or aluminium foil 212 in order to prevent.Light-proofness printing ink 208, so long as for example contain the such black of image-stone China ink or the printing ink of dark coloured pigment or dyestuff, just there is no particular limitation.Light-proofness ink lay 208 has benefit free from environmental pollution when burning disposal, also has the benefit that can utilize metal detector to carry out the detection of the metallic foreign body in the airtight container simultaneously.Therefore, not only further improved the safety of instant food, also can make and check that cost significantly reduces by utilizing metal detector.Aluminium foil 212 has remarkable light-proofness, gas barrier property, fragrance protectiveness etc.

The thickness of light-proofness ink lay 208 depends on the black pigment in the printing ink or the concentration of dyestuff, as long as but generally can fully cover the degree of ultraviolet ray and visual ray.The thickness of aluminium foil 212 is preferably 3~15 μ m, more preferably 7~12 μ m.

(6) sealing layer

Thermosealed layer is sealing film 211 or hot melt layer at the upper end flange portion 1a place of vessel 1.Sealing film 211 can be formed by polyethylene foil, no stretched polypropene film, ionomer resin film, plasticon etc.In addition, can easily peel off from vessel 1 in order to make lid 2, sealing film 211 preferably has easy fissility.Therefore, sealing film 211 preferably has more weak thermal bonding.Hot melt layer can use material known.

As sealing film 211, can use laminated sheet, described laminated sheet for example has polyethylene basis film and low molecular weight polyethylene film in turn from paper sheet 204 1 sides.The thickness of this polyethylene basis film preferably is about 10~40 μ m, is more preferably 20~30 μ m.In addition, the thickness of low molecular weight polyethylene film preferably is about 5~20 μ m, is more preferably 7~15 μ m.Stacked polyethylene foil is so for example sold on market with 760FD (eastern beautiful built up membrane (strain) system).In addition, as sealing film 211, also can use the film that constitutes by ethene-vinyl acetate co-polymer (EVA) and poly compound.In the film that constitutes by this compound, as polyethylene, preferred wire low density polyethylene (LDPE) (LLDPE).The thickness of the film that is made of this compound preferably is about 10~40 μ m, is more preferably 20~30 μ m.In addition, the thickness of hot melt layer is preferably 10~50 μ m, more preferably 20~40 μ m.

As sealing film 211, can enumerate the sealing film (spy opens 2004-26190 number) that constitutes by resin combination, described resin combination comprises straight chain shape ethene-alpha-olefin copolymer [density (JISK6922): 0.870~0.910g/m 3, MFR (JIS K6921,190 ℃, 2.16kg load): 1~100g/10 minute] and polystyrene; Above-mentioned straight chain shape ethene-alpha-olefin copolymer is to be that 3~18 alpha-olefin carries out copolymerization and obtains by ethene and carbon number.Lid 2 with the heat sealing layer that is made of the sealing film if be used for the heat seal of vessel 1, can guarantee that then leak tightness and easily openable exist simultaneously.

In order to give the tearing property of straight line of lid 2 excellences, on sealing film 211, also can form a plurality of parallel in fact linear traces and/or many minute apertures.

(7) adhesive linkage

Adhesive linkage is not particularly limited, but preferably constitutes by the plastics of film like with gleyness.For example, when on paper sheet 204, having the printed layers of literal or pattern etc., preferably crimpiness plastic sheeting 201 and paper sheet 204 are being carried out using transparent adhesive among bonding layer 202 and 203 (203a, the 203b).As long as transparent adhesive has the transparency, just be not particularly limited, but for example can enumerate urethane resin (for example trade name " ロ Star Network ボ Application De RU-40 ", ロ Star Network ペ イ Application ト (strain) system), epoxy resin, acrylic resin, ethene-vinyl alcohol copolymer resins (EVA), polyvinyl acetal is resin (for example polyvinyl formal, polyvinyl butyral (PVB resin), modification PVB etc.), Koroseal etc.

On the adhesive linkage 205,206 (206a, 206b), 208 and 209 of the lower floor of paper sheet 204, can use hot melt, to push stacked polyethylene etc.

(8) the easy peel ply of part

The material that forms the easy peel ply 23 (23a, 23b, 23c) of part is acrylic resin, amilan, alkide resin, butyral resin, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate ester copolymer, nitrocotton etc.Can add a spot of silicone, wax etc. as required.Easily peel ply can form on paper sheet 204 or PBT film 201 by the ink printing that will contain above-mentioned material.Part easily peel ply 23 also can be by being coated on top or following formation of adhesive linkage, but as shown in Figure 5, can also be in adhesive linkage the easy fissility resin of rectangular distribution point-like.Part easily peel ply 23 must accurately be located with half and half grooving 24a~24e, 29,283,293 and 294, so when forming the raw MAT'L (laminated sheet 20) of lid 2, it is made with the printed layers integration of paper sheet 204 or PBT film 201 and by methods such as photogravures.

[3] preparative treatment of each film

(1) formation of linear trace

In order to improve the easy-to-rupture of lid 2, at least one in crimpiness plastic sheeting 201, rigidity plastics film 207 and sealing film 211, can form a plurality of parallel in fact linear traces according to following method.

In order to have film strength and good straight line easy-to-rupture simultaneously, the degree of depth of linear trace is preferably 1~40% of each film thickness, specifically is preferably 0.1~10 μ m.The width of linear trace is preferably 0.1~10 μ m, and the interval between the linear trace is preferably 10~200 μ m.

In order on each film 201,207 and 211, to form linear trace, for example can adopt disclosed method among the WO03/091003.In the method, have on the surface on the roll or metal sheet of the particulate of a plurality of Mohs' scale of hardnesss more than 5,, on film, form a plurality of parallel in fact linear traces while the film of continuous walking is pushed moving contact.As particulate, preferred diamond particle.As the mechanism that film is pressed on roll or the metal sheet, preferred blast injection mechanism or the brush of moving contact on film.By the linear trace of this method acquisition, because do not connect film, so, also can guarantee sufficient fragrance protectiveness and gas barrier property even will form the PET film of linear trace uses as rigidity plastics film 207.

Preferred whole formation the on the single face of each film 201,207 and 211 at least of linear trace.Thus, irrelevant with the orientation of film self, each film 201,207 and 211 is endowed the straight line easy-to-rupture that folk prescription makes progress, and can tear in the mode of straight line from any part along linear trace.

(2) formation of minute aperture

In order to improve the easy-to-rupture of lid 2, at least one in crimpiness plastic sheeting 201, rigidity plastics film 207 and the sealing film 211, can form many minute apertures by following method comprehensively.

Minute aperture preferably has average opening footpath and the about 500/cm of 0.5~100 μ m 2Above distribution density.If the distribution density of minute aperture is less than about 500/cm 2, then tearing property is with deficiency.From the viewpoint of film strength, the distribution density of minute aperture more preferably 1 * 10 3~1 * 10 4Individual/cm 2, be preferably 1 * 10 especially 3~5 * 10 3Individual/cm 2

In order on each film 201,207 and 211, to form minute aperture, for example can adopt No. the 2063411st, Japanese Patent and spy to open disclosed method in 2002-59487 number.For example in No. 2063411 disclosed method of Japanese Patent, adhere to from the teeth outwards and a plurality ofly have between first roll that acute angle part, Mohs' scale of hardness are the particulate more than 5 (roll that above-mentioned linear trace uses is identical with forming) and ganoid second roll, film is passed through while bearing impartial pressing force, so, on film, form many minute apertures.As second roll, can use iron such as having implemented nickel plating, chromium plating is that roll, corrosion-resistant steel are roll, special steel roll etc.

When forming fine holes on sealing film 211, minute aperture can be through hole or non-through hole.When on crimpiness plastic sheeting 201 or rigidity plastics film 207 fine holes being set, from the leak tightness viewpoint of container, minute aperture is preferably non-through hole.By regulating the pressing force between first roll and second roll, can form a side or two sides in through hole and non-through hole.

[4] manufacture method of lid

(1) manufacture method of lamination thin slice

For example under the situation that forms the laminated sheet 20 shown in Fig. 4, formation contains the easily adhesive linkage of peel ply 23a, 23b of part on strip shape paper sheet 21, form simultaneously adhesive linkage below, the stacked crimpiness plastic sheeting 201 of side in the above, the laminated sheet that forms of stacked rigidity plastics film 207 of side and light-proofness ink lay 208 and sealing film 211 below simultaneously.On each film 207 or 211, also can set in advance a plurality of parallel in fact linear traces and/or many minute apertures as required.Make the easy-to-rupture direction of each film 207 or 211 consistent with the length direction of strip paper sheet 21.

Under situation about crimpiness plastic sheeting 201 being laminated on the paper sheet 204, preferably under the state that the MD direction in crimpiness plastic sheeting 201 being applied elastic deformation zone (1~3% elongation) stretches, bond on the paper sheet 204.Thus, can give crimpiness to laminated sheet 20.

In order to carry out 1~3% extension, the tension force that applies 10~20kgf/m width on crimpiness plastic sheeting 201 gets final product.Bond in that crimpiness plastic sheeting 201 is extended under the situation on the paper sheet 204, be applied to tension force on the crimpiness plastic sheeting 201 below the 5kgf/ width.As the resin that can stretch in the mode of elastic deformation, PBT is more suitable.

On one side on crimpiness plastic sheeting 201, apply tension force, on one side with the paper sheet 204 bonding laminated sheets that form 20, have reverse crimpiness in crimpiness plastic sheeting 201 sides, therefore, make crimpiness plastic sheeting 201 carry out rollback for the outside.Thus, laminated sheet 20 in fact curl (As time goes on laminated sheet 20 takes place curling certainly) during rollback.Because it is of short duration smooth that laminated sheet 20 keeps, so do not have obstacle to the punching press/heat seal operation of lid 2.If thermosealed lid 2 is peeled off from vessel 1, then lid 2 becomes rolled state.

Using under the situation of PBT as crimpiness plastic sheeting 201, utilizing the shape memory of PBT, can make laminated sheet 20 memory coil curved shape.For example adopt 2 kinds of methods described in the WO 2004/026577, can make the PBT laminated sheet 20 of memory coil curved shape.

First method (a) will comprise the laminated sheet 20 of PBT film, and one side keeps the temperature T of curly form one side below the glass temperature Tg of PBT 1Carry out figuration and handle (cool working); (b) in the temperature T that surpasses Tg 2Figuration laminated sheet 20 is deformed into smooth shape down; (c) be cooled to the following temperature T of Tg 3After be fixed as smooth shape and form.In addition, second method, (a) (i) laminated sheet 20 one side that will comprise the PBT film remains curly form, and one side is surpassing Tg~the do not arrive temperature T of fusing point 4Under carry out figuration and handle, perhaps (ii) the PBT film is remained curly form on one side on one side in temperature T 4Under carry out figuration and handle, then by carrying out the stacked laminated sheet 20 made from curly form with the thin-film laminate that comprises paper sheet 204; (b) figuration laminated sheet 20 is cooled to temperature T below the Tg 5Be fixed into curly form; (c) figuration laminated sheet 20 is being surpassed Tg~do not arrive T 4Temperature T 6Under be deformed into even shape; (d) be cooled to the following temperature T of Tg 7Be fixed into even shape and constitute.Though the shape memory PBT laminated sheet 20 that uses these methods to make is smooth, recovered crimpiness through the lid 2 behind punch process/heat seal subsequently, therefore if peel off, then take place to curl from vessel 1.

(B) punching press/hemisection processing

As shown in figure 30, with crimpiness plastic sheeting 201 1 sides mounting laminated sheet 20 up,, then once can make a plurality of lids 2 if carry out punching press/hemisection processing by a plurality of drifts.Itself can be undertaken punching press/hemisection processing by known method.Make a pair of crack 22a, 22b, Kaifeng with hemisection groove 24a, 24b, U font hemisection groove 29 and separated material interruption-forming direction with hemisection groove 283,293,294, consistent with the long side direction of strip shape paper sheet.Punch process and hemisection processing can simultaneously or be carried out continuously.

As mentioned above, the present invention will be described with reference to accompanying drawing, but the present invention is not limited to these, only otherwise change purport of the present invention, can apply various changes.For example, as long as a side who has peeled off has bigger crimpiness, then part easily can be any position in the position in the layer of peel ply.

Claims (27)

1, a kind of seal of vessel lid has easily peel ply of paper sheet, crimpiness plastic layer and part, makes described paper sheet be positioned at the downside of described crimpiness plastic layer, come and seal of vessel, wherein,
Have in Kaifeng of outer peripheral edges setting with tab portion with in described Kaifeng and tear starting point with what the both sides of tab portion were provided with,
The easy peel ply of described part is arranged on the described outside of tearing the direction extended line of tearing starting point.
2, seal of vessel lid as claimed in claim 1, wherein,
The easy peel ply of described part is torn the position that starting point is formed up to the center that surmounts described lid from described.
3, as claim 1 or 2 described seal of vessel lids, wherein,
Described lid is provided with and tears the stripping stop flag, and the easy peel ply of described part is formed up to described position of tearing the stripping stop flag from the described starting point of tearing.
4, as any described seal of vessel lid in the claim 1~3, wherein,
Along described tear starting point respectively tear the direction extended line, be provided with Kaifeng hemisection groove at the downside of described lid.
5, seal of vessel lid as claimed in claim 4, wherein,
Described Kaifeng separates a little with the initiating terminal and the described starting point of tearing of hemisection groove.
6, as claim 4 or 5 described seal of vessel lids, wherein,
Described lid is to be made of laminated sheet, and described laminated sheet has crimpiness plastic sheeting, paper sheet and a heat seal film in order at least from top,
Described Kaifeng arrives described paper sheet in the described laminated sheet at least with the hemisection groove.
7, seal of vessel lid as claimed in claim 6, wherein,
Described Kaifeng arrive with the hemisection groove described paper sheet thickness at least about 30% the degree of depth.
8, a kind of seal of vessel lid has easily peel ply of paper sheet, crimpiness plastic layer and part, and described paper sheet is positioned at the downside of described crimpiness plastic layer, come and seal of vessel, wherein,
Have in Kaifeng of outer peripheral edges setting to peel off with the hemisection groove with peeling off than described tab portion and more form with ring-type hemisection groove by the hot water inlet that the downside that is located at described lid is carved in the position of central side with the hemisection groove with tab portion with in the tab portion of described Kaifeng side setting below tab portion
The easy peel ply of described part is set up according to surrounding the mode of described hot water inlet formation with ring-type hemisection groove.
9, seal of vessel lid as claimed in claim 8, wherein,
The easy peel ply of described part is peeled off the position that is formed up to the center that surmounts described lid with the hemisection groove from described tab portion.
10, as claim 8 or 9 described seal of vessel lids, wherein,
Be provided with on described lid and tear the stripping stop flag, the easy peel ply of described part is peeled off with the hemisection groove from described tab portion and is formed up to described position of tearing the stripping stop flag.
11, as any described seal of vessel lid in the claim 1~10, wherein,
Described lid also has separated material interruption-forming tab portion except having described Kaifeng with the tab portion,
Described separated material interruption-forming has a pair of crack with tab portion and makes the open end carve the hemisection groove of a plurality of U of being essentially fonts of the downside that is located at described lid towards the inboard between described a pair of crack,
Each U font hemisection groove is that the connecting portion by a pair of line part and two line parts constitutes,
The front end of described crack and described U font hemisection groove all is positioned at the sealing of described lid,
At the part of being surrounded and the front end of described a pair of line part, with between upwardly extending each straight line in Kaifeng side of tab portion, be provided with separated material interruption-forming easily peel ply of part to described separated material interruption-forming from described U font hemisection groove.
12, container for fast food as claimed in claim 11, wherein,
Described lid easily to tear direction consistent in fact with the direction in described crack, thereby when pinching described separated material interruption-forming with tab portion with described lid when described container body is peeled off, tear described lid from the front end of described crack and described U font hemisection groove, the part of described separated material interruption-forming side below the easy peel ply of part is residual under the state of the upper end flange portion that adheres to container body, forms a plurality of separated material mouths.
13, as claim 11 or 12 described container for fast food, wherein,
Described U font hemisection groove has below described lid the degree of depth to the easy peel ply of described part.
14, as any described seal of vessel lid in the claim 11~13, wherein,
Described separated material interruption-forming is set to the position of tearing the stripping stop flag that described separated material interruption-forming is used with tab portion with the easy peel ply of part from described U font hemisection groove.
15, as any described seal of vessel lid in the claim 11~14, wherein,
The a pair of line part of described U font hemisection groove tilts according to the mode that distolateral interval is narrow more more forward.
16, as any described seal of vessel lid in the claim 11~15, wherein,
Front end in described a pair of crack is provided with a pair of line of the mode bevelled portion according to distolateral interval is broad more more forward.
17, as any described seal of vessel lid in the claim 11~16, wherein,
The front end of a pair of line part of the front end in described crack and described U font hemisection groove is positioned at the outer circumferential side of line of centers of the sealing of described lid.
18, seal of vessel lid as claimed in claim 17, wherein,
The position of front end in described sealing of a pair of line part of the front end in described crack and described U font hemisection groove is in periphery begins 30~50% the scope of width of described sealing.
19, as any described seal of vessel lid in the claim 11~18, wherein,
From each front end in described crack on the straight line that the Kaifeng direction is extended, be provided with separated material interruption-forming hemisection groove.
20, as any described seal of vessel lid in the claim 11~19, wherein,
Along the straight line that each front end from described U font hemisection groove extends to the Kaifeng direction, the downside of described lid is provided with separated material interruption-forming hemisection groove.
21, as any described seal of vessel lid in the claim 1~10, wherein,
(a) roughly on the position of subtend, the separated material interruption-forming of a plurality of rectangles is being carved the downside that is located at lid with the hemisection groove with tab portion with described Kaifeng,
(b) the easy peel ply of described part from described Kaifeng with tab portion tear starting point Kaifeng direction extend, simultaneously be connected to form the U font with the area inside of tab portion or the zone that surmounts the center of described lid in described Kaifeng, and surround described rectangle separated material interruption-forming hemisection groove
(c) do not have described U font part easily peel ply the zone and have described U font part easily in the border in the zone of peel ply, along with the Kaifeng direction border of quadrature roughly, carve at the downside of lid and to be provided with layer and to separate and use a hemisection groove.
22, seal of vessel lid as claimed in claim 21, wherein,
Described U font part easily peel ply is configured to, with do not have this U font part easily in the border in the zone of peel ply with the Kaifeng direction roughly the border of quadrature towards the shape of the central portion bending of lid.
23, as any described seal of vessel lid in the claim 1~22, wherein,
Described crimpiness plastic layer is to be made of the polybutylene terephthalate film.
24, as any described seal of vessel lid in the claim 1~23, wherein,
Begin to have crimpiness plastic layer, paper sheet, adhesive linkage, rigidity plastics film and sealing layer from upper face side,
The easy peel ply of described part is set on the described adhesive linkage.
25, container for fast food as claimed in claim 24, wherein,
Described stiffness films is that the pet film by the different double orientation of one-way orientation or the degree of orientation constitutes.
26, as claim 24 or 25 described seal of vessel lids, wherein,
The easy peel ply of described part be positioned at the top of described adhesive linkage or below, perhaps with described adhesive linkage with the one side in.
27, seal of vessel lid as claimed in claim 26, wherein,
Both sides at the easy peel ply of described part are provided with the gleyness plastic sheeting.
CNA2004800216000A 2003-07-25 2004-07-23 Cover body for sealing container with excellent unsealing retainability CN1829642A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP280364/2003 2003-07-25
JP2003280364 2003-07-25

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JP (2) JP4353944B2 (en)
KR (1) KR20060039406A (en)
CN (1) CN1829642A (en)
WO (1) WO2005009868A1 (en)

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KR20060039406A (en) 2006-05-08
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JP4353944B2 (en) 2009-10-28
WO2005009868A1 (en) 2005-02-03

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