CN208035608U - The stretchable high-barrier composite membrane of resistance to boiling - Google Patents
The stretchable high-barrier composite membrane of resistance to boiling Download PDFInfo
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- CN208035608U CN208035608U CN201820973713.XU CN201820973713U CN208035608U CN 208035608 U CN208035608 U CN 208035608U CN 201820973713 U CN201820973713 U CN 201820973713U CN 208035608 U CN208035608 U CN 208035608U
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- layer
- boiling
- resistance
- film layer
- composite membrane
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Abstract
The utility model discloses a kind of stretchable high-barrier composite membrane of resistance to boiling, which is followed successively by：Laminated polyester film, ink layer, adhesive layer and coextrusion evoh layer, be coextruded evoh layer by ethylene-vinyl alcohol copolymer film layer, be glued respectively to the cast polypropylene film layer of ethylene-vinyl alcohol copolymer film layer both sides and resistance to boiling film layer forms, cast polypropylene film layer is adjacent with adhesive layer.The application is using coextrusion evoh layer as barrier layer and internal layer; not only each layer itself all has excellent barrier property in coextrusion evoh layer, but also cast polypropylene film layer and resistance to boiling film layer have protective effect to ethylene-vinyl alcohol copolymer film layer；The polyethylene film of resistance to boiling good toughness, mechanical strength and heat seal strength are high；To make composite membrane have high barrier and tensile property, machine-shaping property excellent.
Description
Technical field
The utility model is related to a kind of resistance to boiling composite membranes, and in particular to a kind of stretchable resistance to boiling of high-barrier is compound
Film.
Background technology
Digestion resistant food pack (hereinafter referred to as resistance to retort pouch) is mainly used for packing tinned food, prepared food etc.,
Japan, West Europe are also used for packaged beverage, fruit juice, mashed potatoes, cereal foods etc., are had normal using the food of resistance to boil in bag packaging
The lower long-term placement of temperature is all to use 121 DEG C of high-temperature sterilizations without putrid and deteriorated feature, in the market common resistance to retort pouch
Processing, can preserve and protect well content, the universal shelf-life is all within 6 months；Use also very convenient, Ji Nengleng
Food again can heat boil.
Resistance to retort pouch is mostly used trilaminate material and is combined, and representative resistance to retort pouch structure is：Outer layer is polyester film,
It is used as to reinforce；Middle level is aluminium foil, is used as against sunshine, damp proof and anti-gas-leak；Internal layer be polyolefin film (such as polypropylene screen), make heat seal and
Food is contacted to use.
As disclosed a kind of may extend away containing aluminium foil application No. is the Chinese invention patent application of CN201610755846.5
Thermophilic digestion composite membrane, the composite membrane are followed successively by pet layer, ink layer, aluminium foil layer, RCPP layer, ink layer, aluminium from face layer to inner layer
Whole membrane structure is combined by glue bonding between layers of foil and RCPP layers.
The aluminium foil layer contained in the composite membrane make membrane structure have good barrier property, but the ductility of aluminium foil layer compared with
Difference during in packaging process to the local punch forming of film and integrally stretching, is easier to occur aluminium foil layer and splits, perforates etc. ask
Topic causes packaging to fail.
Utility model content
Present invention purpose is to provide a kind of stretchable high-barrier composite membrane of resistance to boiling.
For achieving the above object, the technical solution of the application is as follows：
A kind of stretchable high-barrier composite membrane of resistance to boiling, ecto-entad are followed successively by：Laminated polyester film, ink layer, gluing
Layer and coextrusion evoh layer, the coextrusion evoh layer by ethylene-vinyl alcohol copolymer film layer, be glued respectively to ethylene-
The cast polypropylene film layer of ethenol copolymer film layer both sides and resistance to boiling film layer composition, the curtain coating are poly-
Polypropylene film layer is adjacent with the adhesive layer.
The application abandons aluminium foil as barrier layer and internal layer, and uses coextrusion evoh layer as barrier layer, coextrusion
Not only each layer itself all has excellent barrier property in evoh layer, but also cast polypropylene film layer and the polyethylene of resistance to boiling are thin
Film layer has protective effect to ethylene-vinyl alcohol copolymer film layer, can further increase ethylene-vinyl alcohol copolymer film layer
Gas barrier properties, make the application the composite membrane of resistance to boiling have the moist and gas barrier property of stronger resistance；The polyethylene film of resistance to boiling is tough
Property it is good, there is higher mechanical strength and heat seal strength, be the inner layer material of the ideal composite membrane of resistance to boiling；While the application
Being coextruded evoh layer also has excellent tensile property, ensures that the composite membrane of resistance to boiling of the application has excellent processing forming
Energy.
In the above-mentioned stretchable high-barrier composite membrane of resistance to boiling, the laminated polyester film is pet layer.Above-mentioned
In the stretchable high-barrier composite membrane of resistance to boiling, the layer of polypropylene foil is boiling grade cast polypropylene film layer.
In the above-mentioned stretchable high-barrier composite membrane of resistance to boiling, the boiling grade cast polypropylene film layer is by face
Layer, the first middle layer and first corona layer bonding with ethylene-vinyl alcohol copolymer film layer composition.Wherein first
Corona layer can enhance the adhesive force between boiling grade cast polypropylene film layer and ethylene-vinyl alcohol copolymer film layer,
Adhesive can also be correspondingly set in the case of necessity.
In the above-mentioned stretchable high-barrier composite membrane of resistance to boiling, the resistance to boiling film layer is by the second electricity
Dizzy layer, the second middle layer and hot sealing layer composition, second corona layer and the ethylene-vinyl alcohol copolymer film layer phase
It bonds.Wherein, the second corona layer can enhance between resistance to boiling film layer and ethylene-vinyl alcohol copolymer film layer
Adhesive can also be correspondingly arranged in adhesive force when necessary.
In the above-mentioned stretchable high-barrier composite membrane of resistance to boiling, the hot sealing layer uses 20% high-density polyethylene
Alkene, 50% low density polyethylene (LDPE) and 30% linear low density polyethylene are made, and the thickness of the hot sealing layer is 38~43 μm.It adopts
The hot sealing layer made of above-mentioned raw materials has excellent heat sealability under the thickness, can be obtained 15~20N/ at 130 DEG C
15mm heat seal strengths.
In the above-mentioned stretchable high-barrier composite membrane of resistance to boiling, the cast polypropylene film layer, ethylene-vinyl
Alcohol copolymer film layer and be 3 with the Thickness ratio of resistance to boiling film layer:2:3.
In the above-mentioned stretchable high-barrier composite membrane of resistance to boiling, the adhesive layer is boiling resistant polyurethane gluing
Agent.
Compared with prior art, the beneficial effects of the utility model are：
The application, as barrier layer and internal layer, is coextruded in evoh layer, ethylene vinyl alcohol copolymer using coextrusion evoh layer
Object film layer and cast polypropylene film layer not only itself have excellent barrier property, but also cast polypropylene film layer is to second
Alkene-ethenol copolymer film layer has protective effect, can further increase the gas barrier property of ethylene-vinyl alcohol copolymer film layer
Can, make the composite membrane of resistance to boiling of the application that there is the moist and gas barrier property of stronger resistance；The polyethylene film of resistance to boiling good toughness, has
Higher mechanical strength and heat seal strength are the inner layer materials of the ideal composite membrane of resistance to boiling；The coextrusion of the application simultaneously
Evoh layer also has excellent tensile property, ensures that the composite membrane of resistance to boiling of the application has excellent machine-shaping property.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the stretchable high-barrier composite membrane of resistance to boiling of the utility model.
Specific implementation mode
The technical solution of the utility model is described in further details with reference to the accompanying drawings and detailed description.
Embodiment 1
As shown in Figure 1, a kind of stretchable high-barrier composite membrane of resistance to boiling of the present embodiment, ecto-entad are followed successively by：Polyester
Film layer 1, ink layer 2, adhesive layer 3 and coextrusion evoh layer.
Wherein, laminated polyester film 1 is PET (polyethylene terephthalate) layer, and PET has high brightness, high-stiffness
Feature can ensure that the composite membrane of resistance to boiling of the present embodiment has good flatness, more aobvious beauty whole using PET as outer layer
It is clean.
In the present embodiment, boiling resistant polyurethane adhesive may be used in adhesive layer 3.
In the present embodiment, coextrusion evoh layer is by the boiling grade cast polypropylene film layer 4, the ethylene-vinyl that bond successively
Alcohol copolymer film layer 5 and resistance to boiling film layer composition, boiling grade cast polypropylene film layer 4, ethylene-vinyl alcohol are total
Homopolymer film layer 5 and resistance to boiling film layer 6 are bonded in the form of coextrusion, boiling grade cast polypropylene film layer 4
It is all had with resistance to boiling film layer 6 excellent every moist, ethylene-vinyl alcohol copolymer film layer 5 can be formed and be protected
Shield, avoids ethylene-vinyl alcohol copolymer film moisture absorption, ensures that it has excellent gas barrier property always.
In the present embodiment, boiling grade cast polypropylene film layer 4, ethylene-vinyl alcohol copolymer film layer 5 and with resistance to boiling
The Thickness ratio of film layer 6 is 3:2:3.
In order to enhance boiling grade cast polypropylene film layer 4 and resistance to boiling film layer 6 and ethylene vinyl alcohol copolymer
Adhesive property between object film layer 5, in the present embodiment, boiling grade cast polypropylene film layer 4 is by face the 41, first middle layer of layer
It is formed with first corona layer bonding with ethylene-vinyl alcohol copolymer film layer 5.Wherein the first corona layer can enhance boiling
Adhesive force between grade cast polypropylene film layer 4 and ethylene-vinyl alcohol copolymer film layer 5.
In the present embodiment, the Thickness ratio of face the 41, first middle layer 42 of layer and the first corona layer 43 is 1:1:1.Wherein, first
Middle layer 42 and the first corona layer 43 are all made of binary copolymerization polypropylene and are made, so that the composite membrane of resistance to boiling of the present embodiment
With good tensile property；And face layer 41 is made of homopolypropylene, close to outside, homopolypropylene material makes face layer 41
The composite membrane of resistance to boiling for obtaining the present embodiment has excellent heat resistance.
Similarly, resistance to boiling film layer 6 is made of the second corona layer 61, the second middle layer 62 and hot sealing layer 63,
Second corona layer 61 is bonding with ethylene-vinyl alcohol copolymer film layer 5；Second corona layer 61, the second middle layer 62 and heat
The Thickness ratio of sealing 63 is 1:1:1.
In the present embodiment, the second corona layer 61 and the second middle layer 62 are all made of 46% linear low density polyethylene and 54%
High density polyethylene (HDPE) is made, and hot sealing layer 63 is linear low using 20% high density polyethylene (HDPE), 50% low density polyethylene (LDPE) and 30%
Density polyethylene is made, and the thickness of hot sealing layer 63 is 40 μm.The heat seal strength of the resistance to boiling film layer 6 of the present embodiment has
There is excellent heat sealability, 15~20N/15mm heat seal strengths are can be obtained at 130 DEG C.
Claims (8)
1. a kind of stretchable high-barrier composite membrane of resistance to boiling, which is characterized in that ecto-entad is followed successively by：Laminated polyester film, oil
Layer of ink, adhesive layer and coextrusion evoh layer, the coextrusion evoh layer by ethylene-vinyl alcohol copolymer film layer, glue respectively
Knot is formed in the cast polypropylene film layer of ethylene-vinyl alcohol copolymer film layer both sides and resistance to boiling film layer, institute
The cast polypropylene film layer stated is adjacent with the adhesive layer.
2. the stretchable high-barrier composite membrane of resistance to boiling as described in claim 1, which is characterized in that the laminated polyester film
For pet layer.
3. the stretchable high-barrier composite membrane of resistance to boiling as described in claim 1, which is characterized in that the polypropylene film
Layer is boiling grade cast polypropylene film layer.
4. the stretchable high-barrier composite membrane of resistance to boiling as claimed in claim 3, which is characterized in that the boiling grade curtain coating
Layer of polypropylene foil is by face layer, the first middle layer and first electricity bonding with the ethylene-vinyl alcohol copolymer film layer
Dizzy layer composition.
5. the stretchable high-barrier composite membrane of resistance to boiling as described in claim 1, which is characterized in that the poly- second of resistance to boiling
Alkene film layer is made of the second corona layer, the second middle layer and hot sealing layer, second corona layer and the ethylene-vinyl
Alcohol copolymer film layer is bonding.
6. the stretchable high-barrier composite membrane of resistance to boiling as claimed in claim 5, which is characterized in that the thickness of the hot sealing layer
Degree is 38 ~ 43 μm.
7. the stretchable high-barrier composite membrane of resistance to boiling as described in claim 1, which is characterized in that the cast polypropylene
Film layer, ethylene-vinyl alcohol copolymer film layer and be 3 with the Thickness ratio of resistance to boiling film layer:2:3.
8. the stretchable high-barrier composite membrane of resistance to boiling as described in claim 1, which is characterized in that the adhesive layer is resistance to
Boiling polyurethane adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820973713.XU CN208035608U (en) | 2018-06-22 | 2018-06-22 | The stretchable high-barrier composite membrane of resistance to boiling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820973713.XU CN208035608U (en) | 2018-06-22 | 2018-06-22 | The stretchable high-barrier composite membrane of resistance to boiling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208035608U true CN208035608U (en) | 2018-11-02 |
Family
ID=63929242
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820973713.XU Expired - Fee Related CN208035608U (en) | 2018-06-22 | 2018-06-22 | The stretchable high-barrier composite membrane of resistance to boiling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109775111A (en) * | 2019-03-22 | 2019-05-21 | 南京润京新材料科技有限公司 | A kind of resistance to boiling complex pocket and its application method |
-
2018
- 2018-06-22 CN CN201820973713.XU patent/CN208035608U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109775111A (en) * | 2019-03-22 | 2019-05-21 | 南京润京新材料科技有限公司 | A kind of resistance to boiling complex pocket and its application method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181102 Termination date: 20210622 |
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| CF01 | Termination of patent right due to non-payment of annual fee |