CN201506052U - Polyethylene glycol terephthalate/ethylene-ethylene copolymer composite hard tablet - Google Patents
Polyethylene glycol terephthalate/ethylene-ethylene copolymer composite hard tablet Download PDFInfo
- Publication number
- CN201506052U CN201506052U CN2009202325426U CN200920232542U CN201506052U CN 201506052 U CN201506052 U CN 201506052U CN 2009202325426 U CN2009202325426 U CN 2009202325426U CN 200920232542 U CN200920232542 U CN 200920232542U CN 201506052 U CN201506052 U CN 201506052U
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- ethylene
- layer
- polyethylene glycol
- glycol terephthalate
- ethylene copolymer
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Abstract
The utility model discloses a polyethylene glycol terephthalate/ethylene-ethylene copolymer composite hard tablet, which is provided with a polyethylene glycol terephthalate layer and an ethylene-ethylene copolymer layer, wherein the polyethylene glycol terephthalate 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 polyethylene glycol terephthalate layer and the ethylene-ethylene copolymer layer, the polyethylene glycol terephthalate layer and the ethylene-ethylene copolymer layer are bonded and fixed through the adhesive layer, the thickness of the polyethylene glycol terephthalate layer is 0.2 to 0.35 mm, and the thickness of the ethylene-ethylene copolymer layer is 7 to 15 mum. The polyethylene glycol terephthalate/ethylene-ethylene copolymer composite hard tablet solves the problem of lower gas barrier performance existing in a traditional packaging material, is used on the packs of special varieties including foods, agricultural chemicals, intumescent tablets and the like, has quite remarkable effect and excellent performance in the aspects of fragrance keeping and gas preservation, can effectively prevent external oxygen and vapor from entering a wrapping material, and obstructs the seepage of the fragrance and the juice solvent of a content, thereby the shelf life of a product is prolonged.
Description
Technical field
The utility model relates to packaging material manufacturing technology field, and especially a kind of food, beverage, agricultural chemicals, intumescence sheet etc. of being used for have the special PETG/ethylene-vinyl copolymer composite hard sheet of guaranteeing the quality and requiring product packaging material.
Background technology
Current production is packaged in our life ubiquitous, playing an important role aspect the quality that guarantees the packaging article as packaging material, packaging material sole mass performance quality is to the transportation of product, deposit, sale has bigger influence, for picture food, beverage, agricultural chemicals, intumescence sheet etc. has special guaranteeing the quality to require product, they all have higher performance requirement to packaging material, possesses high barrier properties for gases, 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, guarantee the quality the operating period with prolongation, also need the transparency preferably simultaneously, chemical stability, heat-resisting quantity and mechanical performance are to satisfy instructions for use.At present commonly used as surface barrier layer material such as PVDC (polyvinylidene chloride), PA (polyamide) and PE, PP etc. in every performance indications 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 quality 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 PETG/ethylene-vinyl copolymer composite hard sheet is provided, it adopts the high ethylene-vinyl copolymer (EVOH) of barrier properties for gases as the surface barrier layer material, can solve the relatively poor problem of gas barrier property that exists in the existing packaging material effectively, stabilized product quality, thereby the shelf-life of prolongation product.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of PETG/ethylene-vinyl copolymer composite hard sheet, have as the PETG layer of matrix with as the ethylene-vinyl copolymer layer of surperficial barrier material, be provided with adhesive layer between PETG layer and the ethylene-vinyl copolymer layer, the PETG layer is fixing by adhesive layer and ethylene-vinyl copolymer layer bonding.
Furtherly, the thickness of described PETG 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 ethylene-vinyl copolymer (EVOH) as the surface barrier layer material that the utility model adopted, integrate good processability of ethene polymers and the high barrier properties for gases of vinyl alcohol polymer, its barrier property to gas is 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, wearability and higher mechanical strength, be used in food, especially agricultural chemicals, on the packing of special kinds such as intumescence sheet, protecting perfume, it is splendid to protect gas aspect performance, can stop external oxygen and steam to enter in the packing material effectively, intercept the fragrance of content, exosmosing of juice solvent, thereby the shelf-life of prolongation 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. PETG layers, 2. adhesive layer, 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 schematic diagram 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 PETG as shown in Figure 1/ethylene-vinyl copolymer composite hard sheet, have as the PETG layer 1 of matrix with as the ethylene-vinyl copolymer layer 3 of surperficial barrier material, be provided with adhesive layer 2 between PETG layer 1 and the ethylene-vinyl copolymer layer 3, PETG layer 1 is fixing with ethylene-vinyl copolymer layer 3 bondings by adhesive layer 2, wherein, the thickness of PETG layer 1 is 0.275mm, and the thickness of ethylene-vinyl copolymer layer 3 is 10.5 μ m.
PETG 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. transparency is good, satisfies the hope that people see the packing content thing.
5. mechanical performance, heat sealability is good, applicable to multiple package packing machine.
6. chemical stability 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.
Manufacturing process brief introduction of the present utility model is as follows:
1, PETG is carried out surface treatment;
2, adhesive on the PETG surface applied after the processing;
3, the PETG that will be coated with adhesive carries out the drying processing;
4, adhesive in the coating of ethylene-vinyl copolymer surface;
5, with PETG with the ethylene-vinyl copolymerization is carried out compound and solidify oven dry.
After tested, the PETG made from said method/ethylene-vinyl copolymer (PET/EVOH) composite hard sheet and PETG, the oxygen transit dose when low density polyethylene (LDPE) (PET/LDPE) composite hard sheet is used for food, pesticides packaging and steam permeable amount are as follows respectively:
Oxygen transit dose≤3.0cm of PET/EVOH
3/ (m
224h0.1MPa), and oxygen transit dose≤20cm of PET/LDPE
3/ (m
224h0.1MPa); Steam permeable amount≤0.8g/ (m of PET/EVOH
224h), and the steam permeable amount of PET/LDPE is≤2.5g/ (m
224h), this shows that the barrier property of PET/EVOH composite hard sheet is higher than the PET/LDPE composite hard sheet far away.
In sum, adopting EVOH is a kind of outstanding packaging material 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 packaging material 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 packaging material 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, must determine its technical scope according to the claim scope.
Claims (2)
1. PETG/ethylene-vinyl copolymer composite hard sheet, it is characterized in that: have as the PETG layer (1) of matrix with as the ethylene-vinyl copolymer layer (3) of surperficial barrier material, be provided with adhesive layer (2) between PETG layer (1) and the ethylene-vinyl copolymer layer (3), PETG layer (1) is fixing with ethylene-vinyl copolymer layer (3) bonding by adhesive layer (2).
2. PETG according to claim 1/ethylene-vinyl copolymer composite hard sheet, it is characterized in that: the thickness of described PETG 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 |
|---|---|---|---|
| CN2009202325426U CN201506052U (en) | 2009-09-28 | 2009-09-28 | Polyethylene glycol terephthalate/ethylene-ethylene copolymer composite hard tablet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202325426U CN201506052U (en) | 2009-09-28 | 2009-09-28 | Polyethylene glycol terephthalate/ethylene-ethylene copolymer composite hard tablet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201506052U true CN201506052U (en) | 2010-06-16 |
Family
ID=42467185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202325426U Expired - Fee Related CN201506052U (en) | 2009-09-28 | 2009-09-28 | Polyethylene glycol terephthalate/ethylene-ethylene copolymer composite hard tablet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201506052U (en) |
-
2009
- 2009-09-28 CN CN2009202325426U patent/CN201506052U/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 |