CN204054836U - A kind of 7 layers of co-extrusion deep drawn film containing PVDC - Google Patents
A kind of 7 layers of co-extrusion deep drawn film containing PVDC Download PDFInfo
- Publication number
- CN204054836U CN204054836U CN201420485840.7U CN201420485840U CN204054836U CN 204054836 U CN204054836 U CN 204054836U CN 201420485840 U CN201420485840 U CN 201420485840U CN 204054836 U CN204054836 U CN 204054836U
- Authority
- CN
- China
- Prior art keywords
- pvdc
- layers
- extrusion
- eva
- deep drawn
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920001328 Polyvinylidene chloride Polymers 0.000 title claims abstract description 26
- 239000005033 polyvinylidene chloride Substances 0.000 title claims abstract description 26
- 238000001125 extrusion Methods 0.000 title claims abstract description 18
- 238000004806 packaging method and process Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 238000012856 packing Methods 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 235000013365 dairy product Nutrition 0.000 abstract description 2
- 235000013622 meat product Nutrition 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 9
- 239000012528 membrane Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001526 metallocene linear low density polyethylene Polymers 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a kind of 7 layers of co-extrusion deep drawn film containing PVDC, is followed successively by PA, TIE, PE, EVA, PVDC, EVA, PE from outside to inside.The utility model has the advantages that: 7 layers of co-extrusion stretched film of the present utility model, PVDC layer both sides are EVA, and overcome the defect containing adhesive, stretching depth reaches 6cm, require that the packing of product uses for deep drawn high strength, can be used for meat products and gently pack and marine product, dairy products packaging.
Description
Technical field
The utility model relates to packaging material field, is a kind of film specifically, is more specifically a kind of co-extrusion film.
Background technology
Be expressed into by a kind of raw material on Manufactured another kind of film in the processing of film or be mutually bonded to together by Manufactured different types of film and become plural layers, this product is called composite membrane.The material great majority of composite membrane are plastics, but also can paper using, metal forming (being generally aluminium) or fabric etc.The basic demand of composite membrane is exactly will have good gluing between layers to ensure the overall mechanical property of packing.In addition, composite membrane is used for packaging for foodstuff, will use binder in the processing of composite membrane, and the selection of its solvent and gluing technique etc. all will meet corresponding sanitary standard requirement.
Co-extrusion film has most of feature of composite membrane, owing to being by hot melt combination without the need to binder between layers, therefore relatively reliable to the wholesomeness of packaging for foodstuff co-extrusion film.
Coextruded film has the feature of stretching in process, can corresponding raising intensity after plastic tensile, also the plastic material such as nylon, metallocene PE can be added in centre, make it possess and exceed general plastics packed combined strength bination, there is not delamination phenomenon, flexibility is good, and heat sealability is excellent.
PVDC, formal name used at school is " polyvinylidene chloride ", and it is a kind of nonpoisonous and tasteless, safe and reliable high barrier material, except the general performance with plastics, also has the feature such as oil resistivity, corrosion resistance, can be widely used in the industries such as packaging for foodstuff.
The PhilipKwok of Dow Chemical company, the JosephDooley of SteveJenkins and Bin Dun engineering company discloses following content in its paper " new technology of processing high-barrier PVDC ": PVDC can bear the heat time of 6-8 minute within the scope of 150-170 DEG C, and when 210-220 DEG C, bear deficiency of time 30 seconds; And the co-extrusion material heating-up temperature of the application is: PE:160-170 DEG C; EVA:160-180 DEG C; PA binding agent is at 200 DEG C, and PA will ensure that its levelability is minimum also shaping at 220 DEG C.Therefore, co-extrusion stretched film structural design must consider heating temperature and the heated time problem of different materials.
Chinese Patent Application No. 201220654117.8 discloses a kind of PVDC composite membrane, and this patent is a kind of composite membrane, is not a kind of co-extrusion film.
GB/T28117-2011 discloses some PVDC co-extrusion films, but the PVDC co-extrusion film disclosed in this standard has a common feature, and the neighbouring layer being exactly PVDC layer all adopts TIE, and TIE is a kind of binder resin, and its structure does not overcome the defect of composite membrane.
Utility model content
For solving the problems of the technologies described above, the open a kind of 7 layers of co-extrusion stretched film of the utility model, are followed successively by from outside to inside and are followed successively by PA, TIE, PE, EVA, PVDC, EVA, PE from outside to inside.
7 layers of co-extrusion stretched film of the present utility model adopt the multi-layer co-extruded mould of a kind of PVDC to prepare, and described mould has multiple annular or taper stem stem, and described stem stem periphery arranges multilayer for extruding the mold layer of different materials; The runner extruding outlet from molten thermoplastic entrance to annular is set in described mold layer; PVDC extruding layer arranges multiple runner be connected with extruder, and multiple runner forms helical form form in center; The runner of described PP, PE, EVA, takes one-to-two, two point four, and the labyrinth type of four point eight is without dead angle runner.
The utility model has the advantages that: 7 layers of co-extrusion stretched film of the present utility model, PVDC layer both sides are EVA, only contain TIE in the side of PVDC layer, and PVDC has high-barrier function, therefore, use not containing side and the Food Contact of TIE, overcome the foregoing defect containing adhesive; Stretching depth reaches 6cm, requires that the packing of product uses for deep drawn high strength, can be used for meat products and gently packs and marine product, dairy products packaging.
Accompanying drawing explanation
Fig. 1 is the structural representation of 7 layers of co-extrusion deep drawn film;
The runner schematic diagram that Fig. 2 is PVDC mold layer;
Fig. 3 is one-to-two, two point four, and the labyrinth type of four point eight is without dead angle runner schematic diagram.
Detailed description of the invention
Illustrate the utility model below in conjunction with accompanying drawing, the structure of 5 layers of co-extrusion stretched film as shown in Figure 1, is followed successively by PP or PE, EVA, PVDC, EVA, PE from outside to inside.The utility model adopts the multi-layer co-extruded mould of a kind of PVDC to prepare, and as shown in Figure 2 and Figure 3, described mould has multiple annular or taper stem stem, and described stem stem periphery arranges multilayer for extruding the mold layer of different materials; The runner extruding outlet from molten thermoplastic entrance to annular is set in described mold layer; PVDC layer 203 adopts the runner 2031 of multiple entry to design, and 3 runners 2031 form helical form form in center; The raw material of PVDC each extruder in forming process is made just to complete shaping in 1/3 to circumference.Also the passage of other quantity can be adopted, as 2,4 etc., specifically can according to settings such as the thickness of film, the numbers of plies.
Claims (1)
1. 7 layers of co-extrusion deep drawn film containing PVDC, is characterized in that: be followed successively by PA, TIE, PE, EVA, PVDC, EVA, PE from outside to inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420485840.7U CN204054836U (en) | 2014-08-26 | 2014-08-26 | A kind of 7 layers of co-extrusion deep drawn film containing PVDC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420485840.7U CN204054836U (en) | 2014-08-26 | 2014-08-26 | A kind of 7 layers of co-extrusion deep drawn film containing PVDC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204054836U true CN204054836U (en) | 2014-12-31 |
Family
ID=52196414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420485840.7U Expired - Lifetime CN204054836U (en) | 2014-08-26 | 2014-08-26 | A kind of 7 layers of co-extrusion deep drawn film containing PVDC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204054836U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105437686A (en) * | 2014-08-26 | 2016-03-30 | 丹东全德高科技包装有限公司 | PA/TIE/PE/EVA/PVDC/EVA/PE seven-layer co-extruded deep-drawing film |
-
2014
- 2014-08-26 CN CN201420485840.7U patent/CN204054836U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105437686A (en) * | 2014-08-26 | 2016-03-30 | 丹东全德高科技包装有限公司 | PA/TIE/PE/EVA/PVDC/EVA/PE seven-layer co-extruded deep-drawing film |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |