CN104608988B - Pulling-on piece and the packing container containing the pulling-on piece - Google Patents
Pulling-on piece and the packing container containing the pulling-on piece Download PDFInfo
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- CN104608988B CN104608988B CN201510019377.6A CN201510019377A CN104608988B CN 104608988 B CN104608988 B CN 104608988B CN 201510019377 A CN201510019377 A CN 201510019377A CN 104608988 B CN104608988 B CN 104608988B
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Abstract
Pulling-on piece the present invention relates to be used for packing container, pulling-on piece includes the layer of following order：Aluminium foil layer, MPE/LDPE/LLDPE mixture layer packing containers, the invention further relates to packing container, including packing container main body, packing container main body includes being arranged on opening portion of the container top for pouring out food, the opening portion is covered by pulling-on piece, and sealed along the periphery of opening portion from pulling-on piece top, opening portion is from following by interior band covering, the lower surface of the periphery of opening portion and the combination fused with one another of the inner surface of pulling-on piece.Pulling-on piece has opens effect well.
Description
Technical field
The present invention relates to a kind of packing container pulling-on piece, further relate to manufacture the method and the packaging using the pulling-on piece of the pulling-on piece
Container.
Background technology
Packing container for food has packing container main body, is arranged on container top for pouring out the opening of food
Portion, the shedding motion such as mouth of pipe, cover or lid and pulling-on piece or suction pipe.Fig. 2 shows of the packing container sealed with pulling-on piece 4
Example.The packing container 1 has main body 2 and is arranged on container top for the opening portion 3 of food.
Fig. 1 is the sectional view of the peripheral part for representing opening portion and opening portion.In order to seal opening portion 3, opening portion 3 is drawn
Piece 4 is covered, and is sealed along the periphery 3a of opening portion 3 from the top of pulling-on piece 4.Additionally, opening portion 3 is covered from following by interior band 5, open
The inner surface of lower surface and pulling-on piece 4 combination fused with one another of the periphery 3a of oral area 3, to seal.
In order to pour out food, the piece of the unsealing part of pull-up pulling-on piece 4, interior band 5 is near the marginal portion of opening portion
Part disconnects, and with peel-open tab 4, disconnects the sealing of opening portion 3.In above process, whether packing container easily tears extremely important,
, it is necessary to obtain good unlatching effect when peeling off pulling-on piece, tear that is irregular and having fiber to drop can contaminated food products.
The content of the invention
One aspect of the present invention provides pulling-on piece, the pulling-on piece at least layer including following order：Aluminium foil layer, MPE/
LDPE/LLDPE mixture layers.
The quality of the MPE accounts for the 20-50% of MPE/LDPE/LLDPE mixture layers.
The pulling-on piece also includes LDPE/LLDPE mixture layers, and the LDPE/LLDPE mixture layers are arranged on the aluminium foil
Between layer, MPE/LDPE/LLDPE mixture layers.
The pulling-on piece also include LLDPE layers, it is described be arranged on the aluminium foil layer, MPE/LDPE/LLDPE mixture layers it
Between.
The pulling-on piece is described to be arranged between the aluminium foil layer, LDPE/LLDPE mixture layers also including LLDPE layers.
The weight ratio of LLDPE is more than in LDPE/LLDPE mixture layers in the MPE/LDPE/LLDPE mixture layers
The weight ratio of LLDPE.
The another aspect of the application is related to a kind of method for manufacturing pulling-on piece, comprises the following steps：
According to order co-extrusion pressure following component as described below：Aluminium foil layer, MPE/LDPE/LLDPE mixture layers；Or aluminium foil
Layer, LDPE/LLDPE mixture layers, MPE/LDPE/LLDPE mixture layers；Or aluminium foil layer, LLDPE layer, MPE/LDPE/LLDPE
Mixture layer or aluminium foil layer, LLDPE layer, LDPE/LLDPE mixture layers, MPE/LDPE/LLDPE mixture layers, these layers are pressed
According to said sequence lamination.The raw material used in the above method is conventional raw material, has no special requirements, and each step lamination can be basic
Carried out under identical process conditions, to process equipment also without particular/special requirement.Preparation can also be processed by the way of blowing.
The another aspect of the application is related to a kind of packing container using above-mentioned pulling-on piece, the packing container to hold including packaging
Device main body, the packing container main body includes being arranged on opening portion of the container top for pouring out food, and the opening portion is drawn
Piece is covered, and is sealed along the periphery of opening portion from pulling-on piece top, and opening portion is covered from following by interior band, the periphery of opening portion
The inner surface combination fused with one another of lower surface and pulling-on piece, the pulling-on piece includes the layer of following order：Aluminium foil layer, MPE/LDPE/
LLDPE mixture layers, the quality of the MPE accounts for the 20-50% of MPE/LDPE/LLDPE mixture layers.
The above-mentioned of the application and other features, aspect and advantage is more readily understood with reference to described further below.
Brief description of the drawings
Fig. 1 is the sectional view of the neighbouring part for representing opening portion and opening portion.
Fig. 2 is a perspective view for example for representing packing container.
Symbol description
1 packing container
2 packing container main bodys
3 opening portions
4 pulling-on pieces
Band in 5
3a opening portions periphery
Specific embodiment
The participation in the election detailed description for being preferable to carry out method of the invention below and including embodiment this public affairs can be more easily understood
Open content.A large amount of terms can be referred in description below and claims, these terms are defined as following meanings.
Singulative includes that plural number discusses object, unless the context clearly dictates otherwise.
" optional " or " optionally " refers to that the item that describes thereafter or event may or may not occur, and this is retouched
State the situation that situation and event including event generation do not occur.
Approximate term in specification and claims is used for modifying quantity, represents that the present invention is not limited to this specific
Quantity, also including the acceptable part without cause the amendment of the change of related basic function close to the quantity.Phase
Answer, a numerical value is modified with " about ", " about " etc., mean the invention is not restricted to the exact numerical.In some examples, approximately
Term likely corresponds to the precision of the instrument of measured value.In present specification and claims, scope is limited can be with
Combine and/or exchange, these scopes include all subranges contained therebetween if not stated otherwise.
" polymer blend " refers to the different homopolymers of two or more molecular structure, copolymer or homopolymers and is total to
The physical mixture of polymers.There is no the contact of covalent bond between the macromolecular of general two component.The mixing of polymer is to absorb heat
Journey, is the heterogeneous system being dispersed in by a kind of polymer in another polymer.The purpose of blending is prepared in some property
Can on improve to some extent or unique energy polymeric material.Polymer blend is a kind of earliest heterogeneous polymerization for occurring
Thing.Early in 20 beginnings of the century, just there is the patent report that shock proof polystyrene is obtained by blending.More letter is blended in technique
Single, the range of choice of component is larger, the new material with property can be conveniently fabricated, so have developed rapidly.
Term " LDPE " used herein, refers to low density polyethylene (LDPE), and term " LLDPE " used herein is
Refer to LLDPE.
Term " MPE " used in this application is metallocene PE, is the polyethylene synthesized as catalyst with metallocene.Cause
This, the PE being polymerized with traditional Ziegler-Natta catalyst in performance has significant difference.
Pulling-on piece, the pulling-on piece includes the layer of following order：Aluminium foil layer, MPE/LDPE/LLDPE mixture layers, the matter of the MPE
Amount accounts for the 20-50% of MPE/LDPE/LLDPE mixture layers.It is demonstrated experimentally that 20-50% is a ratio with good operation of opening/locking effect,
After LDPE is mixed with LLDPE, mixture layer has general heat sealability.
Used as a preferred technical scheme, pulling-on piece also includes LDPE/LLDPE mixture layers, and the LDPE/LLDPE is mixed
Compound layer is arranged between the aluminium foil layer, MPE/LDPE/LLDPE mixture layers.LDPE/LLDPE mixture layers can be as
The buffering of aluminium foil layer, MPE/LDPE/LLDPE mixture layers, can effectively improve unlatching effect.
Used as a preferred technical scheme, pulling-on piece is described to be arranged on the aluminium foil layer, MPE/ also including LLDPE layers
Between LDPE/LLDPE mixture layers.After adding LLDPE layers, open better excellent, obtain from the inside to the outside, LLDPE is dense
Several layers for tapering into are spent, unlatching effect is improve.
Used as a preferred technical scheme, pulling-on piece is described to be arranged on the aluminium foil layer, LDPE/ also including LLDPE layers
Between LLDPE mixture layers.
Used as a preferred technical scheme, the weight ratio of LLDPE is more than in MPE/LDPE/LLDPE mixture layers
The weight ratio of LLDPE in LDPE/LLDPE mixture layers.The program can obtain more excellent unlatching effect.
Using above-mentioned preferred technical scheme, by experiment, it is able to demonstrate that, preferred scheme can obtain breaking performance
More preferable pulling-on piece, is more easy to obtain neat fiberless fracture port.
Prevent from causing film to peel off during tear, occur film residual or wire drawing and release surface poor appearance the problems such as.It is excellent
Selection of land, it is adaptable to the binder resin hyperbranched type nano modified polyurethane adhesive of the selection with ad hoc structure of above-mentioned condition
（CPUAD）, it is prepared by following steps：
（1）By acid alcohol mol ratio 1：(1.0~1.2) weigh ternary acid and dihydroxylic alcohols is added in reactor, are warming up to 140
DEG C, addition accounts for the catalyst of reaction system gross mass 2 ‰, is stirred under nitrogen protective condition；
The structure of the ternary acid is as follows：
The dihydroxylic alcohols is propane diols；
（2）When tower top cut point is less than 80 DEG C, when starting to be gradually heating to 210 DEG C of reaction temperature, in nitrogen protection
Under the conditions of be incubated 2~3h；
（3）At 210 DEG C of reaction temperature, gradually vacuumize from low to high, closed less than 1mg KOH/g to product acid number
Lattice polyester；
（4）Being added in reactor through the polyester after vacuum dehydration for number needed for formula is weighed, 80 DEG C are warming up to；
（5）The chain extender through distillation dehydration of number needed for adding, is well mixed；
（6）The isocyanates of number needed for adding, rapid stirring when stirring difficult, is gradually added into mixed solvent；
（7）Number catalyst, 1h is stirred under the conditions of 60~80 DEG C needed for adding；
（8）The nano silicon and silane coupler through dried process of number needed for adding, in 60~80 DEG C of bars
1h is stirred under part；
（9）The polymerization inhibitor of number needed for adding, stirs 10min；
（10）The finished product through inspection, loading sebific duct.
When above-mentioned isocyanates is solid aromatic race isocyanates, add again after need to being melted in 60~80 DEG C of hot water
Enter.
The adhesive is used to be bonded aluminium foil and resin, and bonding is realized in the way of spraying or be laminated.
For pulling-on piece-interior band opening structure, because interior band has at least 5 Rotating fields, pulling-on piece also has 2 Rotating fields, each layer it
Between adhesive strength should be significantly greater than in band fracture strength, in another patent of present invention applicant, there is provided one
Brand-new interior band structure is planted, interior band has more preferable breaking property so that fracture port is neatly without fiber.
The structure of pulling-on piece can be bonded hot sealing layer and aluminium foil using adhesive, but adhesive may be such that hot sealing layer more
Easy fracture, so as to cause the irregular fracture of hot sealing layer.The present inventor is had found by substantial amounts of experiment, for being bonded heat
The adhesive of sealing and aluminium foil layer it is not necessary to, the present invention keeps hot sealing layer by improving the tearing strength of hot sealing layer
Heat sealability, you can obtain that fracture port is neat and fiberless pulling-on piece.People in the art is breached using the solution of the present invention
The conventional thought of member（Unlatching effect is improved by improving layers cementing power）, simply increase the tearing strength of hot sealing layer
The pulling-on piece opened and work well can be obtained.
The another aspect of the application is related to a kind of method for manufacturing pulling-on piece, comprises the following steps：
According to order co-extrusion pressure following component as described below：Aluminium foil layer, MPE/LDPE/LLDPE mixture layers；Or aluminium foil
Layer, LDPE/LLDPE mixture layers, MPE/LDPE/LLDPE mixture layers；Or aluminium foil layer, LLDPE layer, MPE/LDPE/LLDPE
Mixture layer or aluminium foil layer, LLDPE layer, LDPE/LLDPE mixture layers, MPE/LDPE/LLDPE mixture layers, these layers are pressed
According to said sequence lamination.The raw material used in the above method is conventional raw material, has no special requirements, and each step lamination can be basic
Carried out under identical process conditions, to process equipment also without particular/special requirement.Preparation can also be processed by the way of blowing.
The another aspect of the application is related to a kind of packing container using above-mentioned interior band.
The packing container includes being arranged on opening portion of the container top for pouring out food, and the opening portion is covered by pulling-on piece
Lid, and sealed along the periphery of opening portion from pulling-on piece top, opening portion is covered from following by interior band, the following table of the periphery of opening portion
The inner surface combination fused with one another of face and pulling-on piece, the pulling-on piece includes the layer of following order：Aluminium foil layer, MPE/LDPE/LLDPE are mixed
Compound layer, the quality of the MPE accounts for the 20-50% of MPE/LDPE/LLDPE mixture layers.
In one embodiment, the LDPE in the layer such as MPE/LDPE/LLDPE mixture layers can be homopolymers, but
Condition is another alpha-olefin that the homopolymers can optionally comprise up to 5%.Although potentially there are a small amount of other α-
Alkene, LDPE is commonly referred to as Natene.
In one embodiment, the LDPE for being suitable for the application can have according to the following close of ASTM D1505 measure
Degree：It is 0.910~0.925, preferably 0.918~0.925；According to the following fusing point that ASTM D3418 are determined：About 102 DEG C to greatly
About 110 DEG C, alternatively from about 102 DEG C to about 106 DEG C, or alternatively from about 106 DEG C to about 110 DEG C；And root
According to the vicat softening temperature that ASTM D1525 are determined：From about 86 DEG C to about 102 DEG C, alternatively from about 92 DEG C to about
102℃。
In one embodiment, can be used for the density of the LLDPE of the application for 0.918~0.930, preferably 0.919~
0.925。
In one embodiment, it is suitable for the MPE of the application for ethene rubs with about 0.2 mole of % to about 0.5
The copolymer of the 1- hexenes of your %.In embodiments, it is suitable for the MPE of the application, such as MLLDPE, can has according to ASTM
D1505 determine with lower density：From about 0.913g/cc to about 0.918g/cc, alternatively from about 0.913g/cc to big
About 0.915g/cc；Or the following fusing point determined according to ASTM D3418：From about 112 DEG C to about 120 DEG C, alternatively from
About 112 DEG C to about 115 DEG C, or alternatively from about 115 DEG C to about 119 DEG C；Or determined according to ASTM D1238
Following melt index (MI)：From about 0.7g/10min. to about 1.6g/10min., alternatively from about 0.9g/10min. to big
About 1.3g/10min.；Or the vicat softening temperature determined according to ASTM D1525：From about 100 DEG C to about 106 DEG C, can
Selection of land from about 100 DEG C to about 103 DEG C, or alternatively from about 103 DEG C to about 106 DEG C.
The thickness of the aluminium foil of pulling-on piece can select 5-100 microns, LLDPE layers 1-20 microns, LDPE/LLDPE mixture layers
1-12 microns, 8-20 microns of MPE/LDPE/LLDPE mixture layers.Lamination is carried out in the order described above obtains pulling-on piece.
The present invention is described in detail referring to several examples.
Example 1
Pulling-on piece：
Aluminium foil:Tianjin Eastern Mountain, 40 microns.
MPE/LDPE/LLDPE mixture layers：MPE/LDPE/LLDPE=1:1:1.
LLDPE：Melt index 2.0, density 0.918 g/cm3, MPE：Melt index 1.0, the g/cm3 of density 0.918,
LDPE：Melt index 2.0, the g/cm3 of density 0.924, the above is mass ratio.
Resin as described above is heated and melts, each layer respectively 40 microns of MPE/ of aluminium foil for the plural layers being molded
25 microns of LDPE/LLDPE mixture layers.
Interior band：
Each layer that band is used in preparing is respectively：Low density polyethylene (LDPE) is 1/5 common with LLDPE weight ratio
Outer layer, low density polyethylene (LDPE) and the LLDPE weight of thing are mixed than the intermediate layer for 5/1, including adhesive (Ad)
The barrier layer of adhesive phase and ethylene-vinyl alcohol copolymer (EVOH).
Resin as described above is heated and melts, the resin of fusing is according to low density polyethylene (LDPE) and LLDPE
Blend/low density polyethylene (LDPE) and LLDPE blend/adhesive/ethylene-vinyl alcohol copolymer/adhesive
Layer/low density polyethylene (LDPE) and LLDPE blend/low density polyethylene (LDPE) and LLDPE blend
Order be filled with co-extrusion compression mould, and be molded into film.The plural layers being molded have includes LLDPE (thickness degree
It is 6 microns)/LDPE (thickness degree is 2 microns)/Ad (thickness degree is 5 microns)/EVOH (thickness degree is 7 microns)/Ad (thickness degree
It is 5 microns) hierarchy of/LDPE (thickness degree be 9 microns)/LLDPE (thickness degree is 6 microns).
Example 2
Pulling-on piece：
Aluminium foil:Tianjin Eastern Mountain, 40 microns.
MPE/LDPE/LLDPE mixture layers：MPE/LDPE/LLDPE=1:2:2.
LLDPE：Melt index 2.0, density 0.918 g/cm3, MPE：Melt index 1.0, the g/cm3 of density 0.918,
LDPE：Melt index 2.0, the g/cm3 of density 0.924, the above is mass ratio.
Resin as described above is heated and melts, each layer respectively 40 microns of MPE/ of aluminium foil for the plural layers being molded
25 microns of LDPE/LLDPE mixture layers.
It is interior with same as Example 1.
Example 3
Pulling-on piece：
Aluminium foil:Tianjin Eastern Mountain, 40 microns.
MPE/LDPE/LLDPE mixture layers：MPE/LDPE/LLDPE=4:3:3.
LLDPE：Melt index 2.0, density 0.918 g/cm3, MPE：Melt index 1.0, the g/cm3 of density 0.918,
LDPE：Melt index 2.0, the g/cm3 of density 0.924, the above is mass ratio.
Resin as described above is heated and melts, each layer respectively 40 microns of MPE/ of aluminium foil for the plural layers being molded
30 microns of LDPE/LLDPE mixture layers.
It is interior with same as Example 1.
Example 4
Pulling-on piece：
Aluminium foil:Tianjin Eastern Mountain, 40 microns.
LLDPE layers：Melt index 2.0, the g/cm3 of density 0.918
MPE/LDPE/LLDPE mixture layers：MPE/LDPE/LLDPE=1:2:2.
LLDPE：Melt index 2.0, density 0.918 g/cm3, MPE：Melt index 1.0, the g/cm3 of density 0.918,
LDPE：Melt index 2.0, the g/cm3 of density 0.924, the above is mass ratio.
Resin as described above is heated and melts, each layer respectively 40 microns of aluminium foil of the plural layers being molded,
LLDPE layers 15 microns, 15 microns of MPE/LDPE/LLDPE mixture layers.
It is interior with same as Example 1.
Example 5
Pulling-on piece：
Aluminium foil:Tianjin Eastern Mountain, 40 microns.
LDPE/LLDPE mixture layers：LDPE/LLDPE=1:1
MPE/LDPE/LLDPE mixture layers：MPE/LDPE/LLDPE=1:2:2.
LLDPE：Melt index 2.0, density 0.918 g/cm3, MPE：Melt index 1.0, the g/cm3 of density 0.918,
LDPE：Melt index 2.0, the g/cm3 of density 0.924, the above is mass ratio.
Resin as described above is heated and melts, each layer respectively 40 microns of aluminium foil of the plural layers being molded,
LLDPE layers 15 microns, 10 microns of LDPE/LLDPE mixture layers, 10 microns of MPE/LDPE/LLDPE mixture layers.
It is interior with same as Example 1.
Example 6
Pulling-on piece：
Aluminium foil:Tianjin Eastern Mountain, 40 microns.
LLDPE layers：Melt index 2.0, the g/cm3 of density 0.918
LDPE/LLDPE mixture layers：LDPE/LLDPE=1:3
MPE/LDPE/LLDPE mixture layers：MPE/LDPE/LLDPE=1:1:1.
LLDPE：Melt index 2.0, density 0.918 g/cm3, MPE：Melt index 1.0, the g/cm3 of density 0.918,
LDPE：Melt index 2.0, the g/cm3 of density 0.924, the above is mass ratio.
Resin as described above is heated and melts, each layer respectively 40 microns of aluminium foil of the plural layers being molded,
LLDPE layers 10 microns, 10 microns of LDPE/LLDPE mixture layers, 10 microns of MPE/LDPE/LLDPE mixture layers.
It is interior with same as Example 1.
Example 7
Pulling-on piece：
Aluminium foil:Tianjin Eastern Mountain, 40 microns.
MPE/LDPE/LLDPE mixture layers：MPE/LDPE/LLDPE=4:1:1.
LLDPE：Melt index 2.0, density 0.918 g/cm3, MPE：Melt index 1.0, the g/cm3 of density 0.918,
LDPE：Melt index 2.0, the g/cm3 of density 0.924, the above is mass ratio.
Resin as described above is heated and melts, each layer respectively 40 microns of aluminium foil of the plural layers being molded,
25 microns of MPE/LDPE/LLDPE mixture layers.It is interior with same as Example 1.
Example 8
Pulling-on piece：
Aluminium foil:Tianjin Eastern Mountain, 40 microns.
LLDPE layers：Melt index 2.0, the g/cm3 of density 0.918
LDPE/LLDPE mixture layers：LDPE/LLDPE=3:1
MPE/LDPE/LLDPE mixture layers：MPE/LDPE/LLDPE=1:1:1.
LLDPE：Melt index 2.0, density 0.918 g/cm3, MPE：Melt index 1.0, the g/cm3 of density 0.918,
LDPE：Melt index 2.0, the g/cm3 of density 0.924, the above is mass ratio.
Resin as described above is heated and melts, each layer respectively 40 microns of aluminium foil of the plural layers being molded,
25 microns of MPE/LDPE/LLDPE mixture layers.It is interior with same as Example 1.
Comparative example 1
Pulling-on piece：
Aluminium foil:Tianjin Eastern Mountain, 40 microns.
LLDPE layers：Melt index 2.0, the g/cm3 of density 0.918
Resin as described above is heated and melts, each layer respectively 40 microns of aluminium foil of the plural layers being molded,
LLDPE layers 25 microns.It is interior with same as Example 1
Comparative example 2
Pulling-on piece：
Aluminium foil:Tianjin Eastern Mountain, 40 microns.
LDPE layer：Melt index 2.0, the g/cm3 of density 0.924.
Resin as described above is heated and melts, each layer respectively 40 microns of aluminium foil of the plural layers being molded,
25 microns of LDPE layer.It is interior with same as Example 1.
Comparative example 3
Pulling-on piece：
Aluminium foil:Tianjin Eastern Mountain, 40 microns.
MPE layers：Melt index 1.0, the g/cm3 of density 0.918.
Resin as described above is heated and melts, each layer respectively 40 microns of aluminium foil of the plural layers being molded,
25 microns of LDPE layer.It is interior with same as Example 1.
Assay method
Plural layers according to being obtained in above-mentioned example can obtain the pulling-on piece and interior band of various types.Use these various types
The interior band and pulling-on piece of formula, the lower surface of the opening portion sealed with the pulling-on piece of paper container as shown in Figure 2 along periphery sealing, so that
From lower side seals opening portion.When open seal off opening portion using the pulling-on piece in above-mentioned example when, visually observe pulling-on piece exist
How to be disconnected at part near the marginal portion of opening portion.When pulling-on piece is peeled off, interior band is promptly cut off, interior band or pulling-on piece
There is no a part to leave fiber or fritter, then test passes.Conversely, after if interior band disconnects, the part of pulling-on piece leave fiber and
Fritter, then test failure.
Every kind of pulling-on piece takes 1000 samples, and determines the quantity of wherein qualified samples, as a result as shown in table 1.
Table 1
| Sample | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | To 1 | To 2 | To 3 |
| Qualified % | 81 | 83 | 79 | 95 | 96 | 98 | 95 | 85 | 56 | 59 | 64 |
By the test result that above-mentioned requirements are extremely strict, show, can be significantly using the scheme of MPE/LDPE/LLDPE
The unlatching effect of pulling-on piece is reduced, and is individually then unable to reach using any polymer and is opened effect well.Such scheme
In, increase and use foregoing adhesive, the adhesive to be prepared using aforementioned preparation process.Example 1-3 can improve qualification rate extremely
Few 19%.
Foregoing example is merely illustrative, some features of the feature for explaining the disclosure.Appended claim
The scope as wide as possible for requiring to be contemplated that is intended to, and embodiments as presented herein is only according to all possible embodiment
Combination selection implementation method explanation.Therefore, the purpose of applicant is appended claim not by the explanation present invention
Feature example selectional restriction.And the progress in science and technology by formed language performance it is inaccurate due to and not
The possible equivalent or son being presently considered are replaced, and these changes should also be interpreted by appended in the conceived case
Claim is covered.
Claims (2)
1. the layer of pulling-on piece, including following order：Aluminium foil layer, LLDPE layer, LDPE/LLDPE mixture layers, MPE/LDPE/LLDPE
Mixture layer；
The LDPE/LLDPE mixture layers are arranged between the aluminium foil layer, MPE/LDPE/LLDPE mixture layers；
Described LLDPE layers is arranged between the aluminium foil layer, LDPE/LLDPE mixture layers；
The mass ratio of the LDPE and LLDPE described in the LDPE/LLDPE mixture layers is 1：3；
The MPE and LDPE described in the MPE/LDPE/LLDPE mixture layers, the mass ratio of the LLDPE are 1：1：1.
2. packing container, the packing container includes packing container main body, and the packing container main body includes being arranged on vessel top
Portion is used to pour out the opening portion of food, and the opening portion is covered by pulling-on piece, and is sealed along the periphery of opening portion from pulling-on piece top,
Opening portion is from following by interior band covering, the lower surface of the periphery of opening portion and the combination fused with one another of the inner surface of pulling-on piece, the drawing
Piece is the pulling-on piece described in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510019377.6A CN104608988B (en) | 2015-01-15 | 2015-01-15 | Pulling-on piece and the packing container containing the pulling-on piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510019377.6A CN104608988B (en) | 2015-01-15 | 2015-01-15 | Pulling-on piece and the packing container containing the pulling-on piece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104608988A CN104608988A (en) | 2015-05-13 |
| CN104608988B true CN104608988B (en) | 2017-06-23 |
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| CN201510019377.6A Active CN104608988B (en) | 2015-01-15 | 2015-01-15 | Pulling-on piece and the packing container containing the pulling-on piece |
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| TW534891B (en) * | 1999-02-17 | 2003-06-01 | Tetra Laval Holdings & Finance | Packing container and method of manufacturing the container |
| SE523861C2 (en) * | 2002-05-07 | 2004-05-25 | Tetra Laval Holdings & Finance | Packaging laminate, method of manufacture thereof, and packaging container made of packaging laminate |
| EP1902967B1 (en) * | 2005-07-14 | 2011-09-28 | Tetra Laval Holdings & Finance SA | Packaging container, process for production of inner tape, and inner tape for containers |
| CN201484834U (en) * | 2009-08-14 | 2010-05-26 | 黄山永新股份有限公司 | Composite film for bechamel |
| CN201942109U (en) * | 2010-09-06 | 2011-08-24 | 苏州海顺包装材料有限公司 | Easily-torn cover film |
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2015
- 2015-01-15 CN CN201510019377.6A patent/CN104608988B/en active Active
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| CN104608988A (en) | 2015-05-13 |
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