CN201737296U - Permeable coextrusion film capable of being thermally molded - Google Patents
Permeable coextrusion film capable of being thermally molded Download PDFInfo
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- CN201737296U CN201737296U CN2010202383960U CN201020238396U CN201737296U CN 201737296 U CN201737296 U CN 201737296U CN 2010202383960 U CN2010202383960 U CN 2010202383960U CN 201020238396 U CN201020238396 U CN 201020238396U CN 201737296 U CN201737296 U CN 201737296U
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Abstract
The utility model discloses a permeability adjustable coextrusion film capable of being thermally molded. The coextrusion film comprises a permeable A layer plastic film, a B layer plastic film capable of being thermally sealed and a C layer bonding plastic film, wherein the C layer bonding plastic film is arranged between the A layer plastic film and the B layer plastic film thermally sealed, other plastic layers can also be inserted between the A layer plastic film and the B layer plastic film thermally sealed, and the plastic films are extruded by coextrusion equipment. The coextrusion film has excellent permeability capable of being adjusted. The coextrusion film can be thermally drawn into any shape of packaging container.
Description
Technical field
The utility model relates to a kind of coextruded film, is specifically related to a kind of co-extrusion packing film with Heat forming performance and breathing performance.
Background technology
At present, the lightweight of plastic package material, functionalization, environmental protectionization are the main flow trend of market development.Under the market trend influence, the application that integrates new material, new process, the new novel multi-layer coextruded film environment-friendly package material that designs is day by day extensive.Along with the development of economy to the globalization direction, have diversification, the packing of low-cost, multi-functional, safety and personalized function more and more are subjected to the favor in market.
At present, the principal market of PP TYPE packing is used and is divided into:
1, the multi-layer co-extruded film of non-obstruct can provide customized personalized packing for the client in a lot of fields.Simultaneously, utilize the peculiar functional characteristic of compound heat sealing substrate in the above-mentioned coextruded film, can reach and improve packing production efficiency, reduce the purpose of packing cost.But the multi-layer co-extruded film of existing non-obstruct is not because it possesses permeability to air basically, and its film easy-formation not.Therefore, the multi-layer co-extruded film of this non-obstruct can not be used to pack the fresh-keeping good permeability of ask for something, also will have the class article such as food, medicine, fresh flower of certain shape.
2, the multi-layer co-extruded film of high-barrier.This also is a kind of multi-layer co-extruded film, and the high-barrier coextrusion composite film can be set every layer of packing material according to different demands, but and every performance of binding resin, selected every layer material and prescription.According to intercepting the difference that requires, usually available nylon (PA), polyvinylidene chloride (PVDC) or the ethene-vinyl acetate alcohol copolymer (EVOH) adopted is as barrier material, and the sharpest edges of high-barrier coextruded film are to provide the barrier properties for gases and the aqueous vapor barrier of excellence.The barrier property of the multi-layer co-extruded film of high-barrier is regulated flexibly.But the multi-layer co-extruded film of this high-barrier is not because it possesses permeability to air fully, and yet easy-formation not of its film.Therefore, the multi-layer co-extruded film of this high-barrier can not be used to pack the fresh-keeping good permeability of ask for something, also will have the class article such as food, medicine, fresh flower of certain shape.
Existing coextruded film mainly is to adopt the mode that vacuumizes in the packing that is used for based foods such as fresh meat.If can be in conjunction with the characteristics of this based food, design a kind of packing, existing vacuum-packed permeability to air can be changed in the different circulation stages, keep lower permeability to air when promptly storing, guarantee too much not make a large amount of breedings of germ corrupt because of oxygen as the fresh meat based food; And keep higher permeability to air in the sales stage, and make quick and oxygen reaction generation oxymyoglobin as fresh meat, make the fresh meat based food present cerise, promotion.And the current packaging material has substantially only been paid close attention to the effect that the fresh meat based food can be brought into play in storage, needs to keep high permeability to air to keep the problem of fresh meat product color in sales section and ignored.Therefore, fresh meat product can be effectively protected in exploitation, can make fresh meat product keep the packing of high permeability to air to become a urgent and very necessary task again.
The utility model content
The purpose of this utility model is, overcomes the defective that existing coextruded film packing can not be breathed freely or are difficult for breathing freely, and designs the coextruded film that a kind of existing air permeability and good is easy to moulding again.
For achieving the above object, the technical solution of the utility model is to adopt the ventilative plastic coextruded film of a kind of energy, it is characterized in that, described coextruded film comprises A layer plastic film, B layer heat-sealing plastic film and the C layer adhered plastics film with permeability to air at least, wherein C layer adhered plastics film is between A layer plastic film and B layer heat-sealing plastic film, and above-mentioned plastic film pushes drawn aftershaping again by co-extrusion machine.
Can be applicable to different types of packed article in order to enable coextruded film, the preferable technical scheme of the utility model also has, in described coextruded film, can contain several layers described A layer plastic film and several layers B layer heat-sealing plastic film, and can arrange arbitrarily, make up between layer and the layer, but between described A layer plastic film and B layer heat-sealing plastic film, accompany C layer adhered plastics film.
For the ease of the permeability to air of adjusting coextruded film and the rigidity after the shaping, the preferable technical scheme of the utility model also has, and the thickness of described C layer adhered plastics film accounts for the ratio of coextruded film gross thickness and can adjust between 10%～60%.
In the utility model, for the ease of make the encapsulation of packaging body with coextruded film, and packaging body is not damaged again, wherein preferable technical scheme is to make that the initial fusion temperature of described A layer plastic film is higher at least 5 degrees centigrade than the initial fusion temperature of described B layer heat-sealing plastic film.
According to the requirement difference of packed article to packing correlated performance aspect, the preferable technical scheme of the utility model also has, and described A layer plastic film and B layer heat-sealing plastic film can be selected polymeric type plastics and/or copolymerization class plastics for use.
According to the requirement of packed article to packing particular characteristic aspect, the preferable technical scheme of the utility model also has, and described B layer heat-sealing plastic film is the elastomer plastic of density less than 0.915 gram/cm3.
In order to reduce the cost of coextruded film packing, the preferable technical scheme of the utility model also has, described A layer plastic film is polypropylene and/or polyamide and/or polystyrene and/or polyesters, described B layer heat-sealing plastic film is polyethylene and/or ethylene-vinyl acetate copolymer, and described C layer adhered plastics film is a resin.
In order to help the stretch forming of coextruded film, the preferable technical scheme of the utility model also has, and described C layer adhered plastics film can also can be with the mixing of some kinds of resins with single resin.
Advantage of the present utility model and beneficial effect are: the coextruded film of the ventilative moulding of this a kind of energy not only has air permeability and good but also be easy to the moulding that is stretched.
Description of drawings
Fig. 1 is the coextruded structure scheme drawing of the utility model embodiment 1;
Fig. 2 is the coextruded structure scheme drawing of the utility model embodiment 2;
Fig. 3 is the coextruded structure scheme drawing of the utility model embodiment 3;
Fig. 4 is the coextruded structure scheme drawing of the utility model embodiment 4;
Fig. 5 is the coextruded structure scheme drawing of the utility model embodiment 5;
In the literary composition and among the figure:
| The English abbreviation | The Chinese full name |
| PP | Polypropylene |
| PA | Polyamide (nylon) |
| PE | Polyethylene |
| EVA | Ethylene-vinyl acetate copolymer |
| PVDC | Polyvinylidene chloride |
| EVHO | The ethene-vinyl acetate alcohol copolymer |
| HOPP | Homo-polypropylene |
| COPP | Co-polypropylene |
| P | A layer plastic film |
| Sealing | B layer heat-sealing plastic film |
| Tie | C layer adhered plastics film |
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is further described.Following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection domain of the present utility model with this.
The concrete technical scheme of implementing of the utility model is:
Embodiment 1:
As shown in Figure 1, present embodiment is 7 layers of co-extrusion membrane structure, wherein the thickness of C layer adhered plastics film accounts for 35% of gross thickness, gross thickness is 125 microns, its permeability to air is 1300 a milliliters/sq m. day .1 barometric pressure, B layer heat-sealing plastic film is selected metallocene PE for use, and A layer plastic film is homo-polypropylene (HoPP).Can pass through the moulding of coextrusion film blowing manufactured.
Embodiment 2:
As shown in Figure 2, present embodiment is 8 layers of coextruded structure, wherein the thickness of C layer adhered plastics film accounts for 175 microns of gross thickness, its permeability to air is 1100 a milliliters/sq m. day .1 barometric pressure, B layer heat-sealing plastic film adopts density to be lower than the ultra-low density polyethylene of 0.890 gram/cm3, and A layer plastic film selected Co-polypropylene (CoPP) for use.Can pass through the moulding of coextrusion casting manufactured.
Embodiment 3:
As shown in Figure 3, present embodiment is 5 layers of coextruded structure, wherein the thickness of C layer adhered plastics film accounts for 10% of gross thickness, gross thickness is 100 microns, its permeability to air is 500 a milliliters/sq m. day .1 barometric pressure, B layer heat-sealing plastic film is selected ethylene-vinyl acetate copolymer (EVA) for use, and A layer plastic film selected polyamide (PA) for use.Can pass through the moulding of coextrusion casting manufactured.
Embodiment 4:
As shown in Figure 4, present embodiment is 3 layers of coextruded structure, wherein C layer adhered plastics film is polypropylene (PP) and the elastomeric blend of polypropylene (PP), gross thickness is 60 microns, its permeability to air is 5800 a milliliters/sq m. day .1 barometric pressure, B layer heat-sealing plastic film is selected ethylene-vinyl acetate copolymer (EVA) for use, and A layer plastic film selected polypropylene (PP) for use.Can pass through the moulding of coextrusion film blowing manufactured.
Embodiment 5:
As shown in Figure 5, present embodiment is 3 layers of coextruded structure, wherein air-permeable layer is polypropylene (PP) and the elastomeric blend of polypropylene (PP), gross thickness is 40 microns, its permeability to air is 6800 a milliliters/sq m. day .1 barometric pressure, B layer heat-sealing plastic film is polyethylene (PE), and A layer plastic film is polypropylene (PP).Can make moulding by the coextruding method blown film.
The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1. plastic coextruded film of breathing freely, it is characterized in that, described coextruded film comprises A layer plastic film, B layer heat-sealing plastic film and the C layer adhered plastics film with permeability to air at least, wherein C layer adhered plastics film is between A layer plastic film and B layer heat-sealing plastic film, and above-mentioned plastic film pushes drawn aftershaping again by co-extrusion machine.
2. coextruded film as claimed in claim 1, it is characterized in that, in described coextruded film, contain several layers described A layer plastic film and several layers B layer heat-sealing plastic film, and can arrange arbitrarily, make up between layer and the layer, but between described A layer plastic film and B layer heat-sealing plastic film, accompany C layer adhered plastics film.
3. coextruded film as claimed in claim 1 or 2 is characterized in that, the thickness of described C layer adhered plastics film accounts for 10%～60% of coextruded film gross thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202383960U CN201737296U (en) | 2010-06-28 | 2010-06-28 | Permeable coextrusion film capable of being thermally molded |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202383960U CN201737296U (en) | 2010-06-28 | 2010-06-28 | Permeable coextrusion film capable of being thermally molded |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201737296U true CN201737296U (en) | 2011-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202383960U Expired - Fee Related CN201737296U (en) | 2010-06-28 | 2010-06-28 | Permeable coextrusion film capable of being thermally molded |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201737296U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870389A (en) * | 2010-06-28 | 2010-10-27 | 江阴升辉包装材料有限公司 | Air-permeable and moldable coextruded film |
| CN102501370A (en) * | 2011-12-05 | 2012-06-20 | 江阴升辉包装材料有限公司 | Embossing plastic film and equipment and embossing technology thereof |
-
2010
- 2010-06-28 CN CN2010202383960U patent/CN201737296U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870389A (en) * | 2010-06-28 | 2010-10-27 | 江阴升辉包装材料有限公司 | Air-permeable and moldable coextruded film |
| CN102501370A (en) * | 2011-12-05 | 2012-06-20 | 江阴升辉包装材料有限公司 | Embossing plastic film and equipment and embossing technology thereof |
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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: 20110209 Termination date: 20180628 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |