CN202895845U - Polypropylene/EVOH (ethylene-vinyl alcohol copolymer) composite hard sheet - Google Patents
Polypropylene/EVOH (ethylene-vinyl alcohol copolymer) composite hard sheet Download PDFInfo
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- CN202895845U CN202895845U CN 201220557860 CN201220557860U CN202895845U CN 202895845 U CN202895845 U CN 202895845U CN 201220557860 CN201220557860 CN 201220557860 CN 201220557860 U CN201220557860 U CN 201220557860U CN 202895845 U CN202895845 U CN 202895845U
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- polypropylene
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Abstract
The utility model relates to a polypropylene composite package material and particularly relates to a polypropylene/EVOH (ethylene-vinyl alcohol copolymer) composite hard sheet. The composite hard sheet comprises a polypropylene base layer and an EVOH layer which are adhered and fixed by an adhesive. By making full use of respective superiority of the polypropylene base layer and the EVOH layer, the polypropylene/low-density vinyl chloride composite hard sheet not only has the advantages of excellent chemical corrosion resistance, high chemical stability, good mechanical properties, light weight and the like, but also has an excellent barrier property and thermal stability, thereby being capable of greatly prolonging the shelf life of food and the validity period of medicine and being extremely extensive in application range; and the composite hard sheet also has the advantages of simple preparation process, safety and environment-friendliness, low cost and the like.
Description
Technical field
The utility model relates to the polyethylene compound package material, relates in particular to a kind of polypropylene/EVOH composite hard sheet.
Background technology
Raising along with rapid development of economy and people's living standard, demand to instant food such as microwave food, leisure food and frozen food will constantly increase, quality requirement to the medicine packing also improves constantly, this will directly drive the demand of relevant food packing, and food, medicine and package packing machine industry also will be kept positive growth within from now on a period of time.The material that now is used for food, medical packaging has a lot, such as PP film, polyvinyl chloride (PVC), aluminium foil etc.PVC has good chemical resistance as a kind of packaging material, higher chemical stability, and have that its transparency is good, luminosity is good, the advantage such as light weight, good mechanical property, regeneration are easy.But it is bad that the shortcoming that PVC layer packaging material are larger is exactly sealing property, even it is very successful that the bad vacuum food of gas barrier property is packed vacuum, behind exposed to air, airborne oxygen is easy to reenter in the evacuated packaging bag, and this has just lost the due effect of vacuum bag.On the other hand, for some dulcet contents, the entering and pack overflowing of interior fragrance and all can reduce client to the satisfaction of product of air.Not only may damage people's health, also can cause product quality undesirable owing to the problem of packing, cause heavy economic losses to enterprise.
Polypropylene has good heat resistance, and goods can be in the sterilization that carries out disinfection of temperature more than 100 ℃, and under the condition that is not subjected to external force, 150 ℃ also indeformable.Brittle temperature is-35 ℃, is being lower than-35 ℃ embrittlement can occur; Polyacrylic chemical stability is fine, and is outside decapacitation is corroded by the concentrated sulfuric acid, red fuming nitric acid (RFNA), all more stable to other various chemical reagent; Polyacrylic high-frequency insulation function admirable is because it absorbs water hardly.
EVOH (ethylene-vinyl alcohol copolymer) distinguishing feature is that gas is had fabulous barrier and fabulous processability, the transparency, glossiness, mechanical strength, retractility, wearability, cold resistance and surface strength are all very excellent in addition, the iris action of polyvinyl processability and vinyl alcohol polymer is combined, ethylene-vinyl alcohol copolymer not only shows fabulous processing characteristics, and gas, smell, spices, solvent etc. are presented excellent blocking effect.Owing to having heat endurance with the ethene combination, the laminated vessel that contains the EVOH barrier layer can reuse fully.
The utility model content
The purpose of this utility model is to overcome the defective that prior art exists, and a kind of good seal performance, safety, polypropylene that the environment protection heat-proof performance is good/EVOH composite hard sheet are provided.
The technical scheme that realizes the utility model purpose is: a kind of polypropylene/EVOH composite hard sheet, comprise polypropylene based layers and evoh layer, and described polypropylene based layers and evoh layer bonding are fixing.
Technique scheme is provided with adhesive layer between described polypropylene based layers and the evoh layer.
Technique scheme, described polypropylene-base layer thickness is 0.2 ~ 0.5mm, the thickness of evoh layer is 5.88 ~ 70.58 μ m.
After adopting technique scheme, the utlity model has following positive effect:
(1) the utility model is the composite hard sheet of polypropylene and EVOH, can give full play to polypropylene and EVOH advantage separately, make polypropylene/EVOH composite hard sheet namely have good chemical resistance, higher chemical stability, the advantages such as good mechanical performance and light weight have again good sealing property, heat endurance, can greatly prolong the term of validity of shelf life and the medicine of food, range of application is extremely wide;
(2) polypropylene based layers and evoh layer link together securely by adhesive layer, and interlayer is difficult for peeling off in conjunction with closely; And evoh layer can be made into different thickness according to actual needs, and manufacturing process is simple, and has advantages of that safety and environmental protection, cost are low.
Description of drawings
Content of the present utility model is easier to be expressly understood in order to make, and the below is described in further detail the utility model, wherein according to specific embodiment also by reference to the accompanying drawings
Fig. 1 is the utility model structural representation.
Each label represents among the figure:
1, polypropylene based layers; 2, adhesive layer; 3, evoh layer.
The specific embodiment
(embodiment 1)
See Fig. 1, the utlity model has polypropylene based layers 1 and evoh layer 3, polypropylene based layers 1 and evoh layer 3 are fixing by adhesive layer 2 bondings.Polypropylene based layers 1 thickness is 0.2mm, and the thickness of evoh layer 3 is 5.88 μ m.
(embodiment 2)
See Fig. 1, the utlity model has polypropylene based layers 1 and evoh layer 3, polypropylene based layers 1 and evoh layer 3 are fixing by adhesive layer 2 bondings.Polypropylene based layers 1 thickness is 0.3mm, and the thickness of evoh layer 3 is 20.5 μ m.
(embodiment 3)
See Fig. 1, the utlity model has polypropylene based layers 1 and evoh layer 3, polypropylene based layers 1 and evoh layer 3 are fixing by adhesive layer 2 bondings.Polypropylene based layers 1 thickness is 0.5mm, and the thickness of evoh layer 3 is 70.58 μ m.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (3)
1. polypropylene/EVOH composite hard sheet is characterized in that: comprise polypropylene based layers (1) and evoh layer (3), described polypropylene based layers (1) and evoh layer (3) bonding are fixing.
2. polypropylene according to claim 1/EVOH composite hard sheet is characterized in that: be provided with adhesive layer (2) between described polypropylene based layers (1) and the evoh layer (3).
3. polypropylene according to claim 1 and 2/EVOH composite hard sheet, it is characterized in that: described polypropylene based layers (1) thickness is 0.2 ~ 0.5mm, the thickness of evoh layer (3) is 5.88 ~ 70.58 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220557860 CN202895845U (en) | 2012-10-29 | 2012-10-29 | Polypropylene/EVOH (ethylene-vinyl alcohol copolymer) composite hard sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220557860 CN202895845U (en) | 2012-10-29 | 2012-10-29 | Polypropylene/EVOH (ethylene-vinyl alcohol copolymer) composite hard sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202895845U true CN202895845U (en) | 2013-04-24 |
Family
ID=48116554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220557860 Expired - Fee Related CN202895845U (en) | 2012-10-29 | 2012-10-29 | Polypropylene/EVOH (ethylene-vinyl alcohol copolymer) composite hard sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202895845U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103922016A (en) * | 2014-04-16 | 2014-07-16 | 昆山市耐光包装材料有限公司 | Thermal-insulation heat-resisting package bag |
| CN106494035A (en) * | 2016-11-22 | 2017-03-15 | 苏州海顺包装材料有限公司 | Low absorbability high drug-resistance pharmaceutical pack composite membrane |
-
2012
- 2012-10-29 CN CN 201220557860 patent/CN202895845U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103922016A (en) * | 2014-04-16 | 2014-07-16 | 昆山市耐光包装材料有限公司 | Thermal-insulation heat-resisting package bag |
| CN106494035A (en) * | 2016-11-22 | 2017-03-15 | 苏州海顺包装材料有限公司 | Low absorbability high drug-resistance pharmaceutical pack composite membrane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20151029 |
|
| EXPY | Termination of patent right or utility model |