CN201506530U - Polyvinyl chloride/ethylene-ethylene copolymer (PVC/EVOH) composite hard tablet - Google Patents
Polyvinyl chloride/ethylene-ethylene copolymer (PVC/EVOH) composite hard tablet Download PDFInfo
- Publication number
- CN201506530U CN201506530U CN2009202325430U CN200920232543U CN201506530U CN 201506530 U CN201506530 U CN 201506530U CN 2009202325430 U CN2009202325430 U CN 2009202325430U CN 200920232543 U CN200920232543 U CN 200920232543U CN 201506530 U CN201506530 U CN 201506530U
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- ethylene
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- polyvinyl chloride
- ethylene copolymer
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Abstract
The utility model discloses a polyvinyl chloride/ethylene-ethylene copolymer (PVC/EVOH) composite hard tablet, which is used as packaging material of foods or drinks, agricultural chemicals, chemicals and the like, and is provided with a polyvinyl chloride layer and an ethylene-ethylene copolymer layer, wherein the polyvinyl chloride layer is used as a basal body, the ethylene-ethylene copolymer layer is used as a surface barrier material, an adhesive layer is arranged between the polyvinyl chloride layer and the ethylene-ethylene copolymer layer, the polyvinyl chloride layer and the ethylene-ethylene copolymer layer are bonded and fixed through the adhesive layer, the thickness of the polyvinyl chloride layer is 0.2-0.35 millimeter, and the thickness of the ethylene-ethylene copolymer layer is 7-15 microns. The polyvinyl chloride/ethylene-ethylene copolymer (PVC/EVOH) composite hard tablet solves the problem of poorer gas barrier performance existing in the traditional packaging material, is used on the packs of foods, especially special varieties including agricultural chemicals, intumescent tablets and the like, and has quite remarkable effect and excellent performance in the aspects of fragrance keeping and gas preservation, thereby the shelf life of a product is prolonged.
Description
Technical field
The utility model relates to field of packaging material, especially a kind of polyvinylchloride, ethylene-vinyl copolymer composite hard sheet that is used for packing such as food and drink, agricultural chemicals, chemicals.
Background technology
Packing are playing an important role aspect the quality that guarantees the packaging article, the quality of packing sole mass is to the transportation of product, deposit, sale has bigger influence, food, beverage, agricultural chemicals, the packing fitness for purpose of chemicals etc. has higher barrier property, can prevent the food of package interior effectively, the moisture of products such as agricultural chemicals and the loss of oxygen and exterior light are to its influence, with the prolongation used life of guaranteeing the quality, also need the transparency preferably in addition, chemical inertness, heat-resisting quantity and mechanical characteristics are in case the quality of the inner product of contracting for fixed output quotas of influence.At present commonly used as surface barrier layer material such as PVDC (polyvinylidene chloride), PA (polyamide) and PE, PP etc. in every performance figure of above-mentioned requirements, especially the gas barrier property aspect also exists very big deficiency, air barrier rate is low excessively, guarantor's gas of packaging article is protected fragrant aspect effect relatively poor, the demanding words of guaranteeing the quality in this way, more be difficult to reach standard, exported product particularly, often because the problem on the packing causes product design undesirable, even return goods, cause very big economic loss to enterprise.
The utility model content
The technical problems to be solved in the utility model is: overcome the deficiency in the prior art, a kind of polyvinylchloride, ethylene-vinyl copolymer composite hard sheet are provided, solved the relatively poor problem of gas barrier property that exists in the existing packing.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of polyvinylchloride, ethylene-vinyl copolymer composite hard sheet, have as the polyvinyl chloride layer of matrix with as the ethylene-vinyl copolymer layer of surperficial barrier material, be provided with adhesive layer between polyvinyl chloride layer and the ethylene-vinyl copolymer layer, polyvinyl chloride layer is fixing by adhesive layer and ethylene-vinyl copolymer layer bonding.
Furtherly, the thickness of described polyvinyl chloride layer is 0.2～0.35mm, and the thickness of ethylene-vinyl copolymer layer is 7～15 μ m.
The beneficial effects of the utility model are: the utility model has solved problems of the prior art, the ethylene-vinyl copolymer (EVOH) that is adopted as the surface barrier layer material, integrate good processability of ethene polymers and the high barrier properties for gases of vinyl alcohol polymer, its gas barrier property is higher 100 times than common PA, compare PE, PP is high 10000 times, high more about more than 10 times than high barrier material PVDC (polyvinylidene chloride) commonly used at present, also has the good transparency simultaneously, glossiness, retractility, resistance to abrasion and higher mechanical strength, be used in food, especially agricultural chemicals, on the packing of special kinds such as intumescence sheet, effect is quite remarkable, protecting perfume, it is splendid to protect gas aspect performance, thereby prolongs the shelf-life of product.
Description of drawings
Below in conjunction with drawings and embodiments the utility model is further specified.
Fig. 1 is a structural representation of the present utility model.
1. polyvinyl chloride layers, 2. adhesive layers, 3. ethylene-vinyl copolymer layers among the figure
The specific embodiment.
In conjunction with the accompanying drawings the utility model is further described now.These accompanying drawings are the scheme drawing of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
A kind of polyvinylchloride as shown in Figure 1, ethylene-vinyl copolymer composite hard sheet, have as the polyvinyl chloride layer 1 of matrix with as the ethylene-vinyl copolymer layer 3 of surperficial barrier material, be provided with adhesive layer 2 between polyvinyl chloride layer 1 and the ethylene-vinyl copolymer layer 3, polyvinyl chloride layer 1 is fixing with ethylene-vinyl copolymer layer 3 bondings by adhesive layer 2, wherein the thickness of polyvinyl chloride layer 1 is 0.3mm, and the thickness of ethylene-vinyl copolymer layer 3 is 10 μ m.
Manufacturing process brief introduction of the present utility model is as follows:
1, polyvinylchloride is carried out surface treatment;
2, adhesion agent in the coating of the polyvinyl chloride surface after the processing;
3, the polyvinylchloride that will be coated with adhesion agent carries out the drying processing;
4, adhesion agent in the coating of ethylene-vinyl copolymer surface;
5, with polyvinylchloride with the ethylene-vinyl copolymerization is carried out compound and solidify oven dry.
After tested, the polyvinylchloride made from said method, ethylene-vinyl copolymer (PVC/EVOH) composite hard sheet and polyvinylchloride, the oxygen transit dose when low density polyethylene (LDPE) (PVC/LDPE) composite hard sheet is used for food, pesticides packaging and steam permeable amount are as follows respectively:
Oxygen transit dose≤3.0cm of PVC/EVOH
3/ (m
224h0.1MPa), and oxygen transit dose≤20cm of PVC/LDPE
3/ (m
224h0.1MPa); Steam permeable amount≤0.8g/ (m of PVC/EVOH
224h), and the steam permeable amount of PVC/LDPE is≤2.5g/ (m
224h), this shows that the barrier property of PVC/EVOH composite hard sheet is higher than the PVC/LDPE composite hard sheet far away.
Polyvinylchloride described in the utility model, ethylene-vinyl copolymer composite hard sheet, it is a kind of good high-barrier packaging material, can stop external oxygen and steam to enter in the packing material effectively, can intercept the exosmosing of fragrance, juice solvent of content again effectively, the ethylene-vinyl copolymer that it has has following characteristics:
1. barrier height, its oxygen transit dose reaches 2.1cm
3/ m
224hmpa, steam permeable amount 1.2g/m
224h, with its packaged food, agricultural chemicals, intumescence sheet, the shelf-life is more than 12 months.
2. heat-resisting quantity is good, prepared composite hard sheet under 121 ℃ of .30min conditions the sterilization after, mechanical strength, barrier does not reduce, composite hard sheet is indeformable, does not ftracture, and is not stratified, smooth surface, dimensional stability is good.
3. interlayer can't be peeled off in conjunction with closely, and PVC/EVOH splitting power reaches about 118N.
4. diaphaneity is good, satisfies the hope that people see the packing content thing.
5. mechanical characteristics, heat sealability is good, applicable to multiple package packing machine.
6. chemical inertness is good, with acid, alkali, benzene etc. chemical reaction does not take place, anti-solvent, oil strong.
7. food hygiene is good, meets state health standards, and is harmless, nontoxic.
In sum, adopting EVOH is a kind of outstanding packing as the composite hard sheet of high barrier material, particularly to digestion resistant with to oxygen, the product of the various smells of water vapour has good barrier, to food, agricultural chemicals, on the packing of intumescence sheet etc., effect is better, more obvious, this is that other packing are incomparable, therefore we believe, continuous development along with science and technology, new packing technique, the appearance of packing method, EVOH high-barrier composite hard sheet more and more is subjected to people in its packing parent looks at, and because of its excellent performance at food, agricultural chemicals, fields such as chemical industry obtain to use widely.
With above-mentioned foundation embodiment of the present utility model is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from the utility model technological thought.Technical scope of the present utility model is not limited to the content on the specification sheets, must determine its technical scope according to the claim scope.
Claims (2)
1. a polyvinylchloride, ethylene-vinyl copolymer composite hard sheet, it is characterized in that: have as matrix polyvinyl chloride layer (1) and as the ethylene-vinyl copolymer layer (3) of surperficial barrier material, be provided with adhesive layer (2) between polyvinyl chloride layer (1) and the ethylene-vinyl copolymer layer (3), polyvinyl chloride layer (1) is fixing with ethylene-vinyl copolymer layer (3) bonding by adhesive layer (2).
2. polyvinylchloride according to claim 1, ethylene-vinyl copolymer composite hard sheet is characterized in that: the thickness of described polyvinyl chloride layer (1) is 0.2～0.35mm, and the thickness of ethylene-vinyl copolymer layer (3) is 7～15 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202325430U CN201506530U (en) | 2009-09-28 | 2009-09-28 | Polyvinyl chloride/ethylene-ethylene copolymer (PVC/EVOH) composite hard tablet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202325430U CN201506530U (en) | 2009-09-28 | 2009-09-28 | Polyvinyl chloride/ethylene-ethylene copolymer (PVC/EVOH) composite hard tablet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201506530U true CN201506530U (en) | 2010-06-16 |
Family
ID=42467658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202325430U Expired - Fee Related CN201506530U (en) | 2009-09-28 | 2009-09-28 | Polyvinyl chloride/ethylene-ethylene copolymer (PVC/EVOH) composite hard tablet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201506530U (en) |
-
2009
- 2009-09-28 CN CN2009202325430U patent/CN201506530U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100616 Termination date: 20120928 |