CN109397778A - A kind of multi-layer co-extruded functional package film of high-barrier with UVResistant effect - Google Patents
A kind of multi-layer co-extruded functional package film of high-barrier with UVResistant effect Download PDFInfo
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- CN109397778A CN109397778A CN201811392638.9A CN201811392638A CN109397778A CN 109397778 A CN109397778 A CN 109397778A CN 201811392638 A CN201811392638 A CN 201811392638A CN 109397778 A CN109397778 A CN 109397778A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
Abstract
The invention discloses a kind of multi-layer co-extruded functional package films of high-barrier with UVResistant effect, are followed successively by the first aramid layer, the first adhesive layer, the first polyolefin layer, the second adhesive layer, the second aramid layer, high-obstruction, third aramid layer, third adhesive layer, the second polyolefin layer from top to bottom；The high-obstruction uses raw material for EVOH.The multi-layer co-extruded functional package film of high-barrier provided by the invention with UVResistant effect is produced using multi-layer co-extruded technique; with excellent UVResistant effect; also there is the performances outstanding such as high-barrier, the wet, puncture resistant of high resistant; content suitable for fields such as food packaging, electronic packaging, medical packagings, in effective protection packaging.
Description
Technical field
The invention belongs to field of packaging material, and in particular to a kind of high-barrier with UVResistant effect is multi-layer co-extruded
Functional package film and preparation method thereof and purposes.
Background technique
Food packaging such as poultry meat products, marine product, cooked product etc., such product is during storage and when shelf life,
The irradiation that will receive light can cause a degree of influence, especially ultraviolet irradiation on content, will affect after irradiation
The color of content can also change the ingredient of content, or even generate degradation.Currently, having in the market with uvioresistant function
The monofilms such as polyester, polyamide, polyethylene, polypropylene, to obtain multi-functional packing film, it is necessary to by various films
Carry out compound, combination process can use various adhesives, auxiliary agent, solvent etc., and there are problem of solvent residual.
Multi-layer co-extruded film is produced using multi-layer co-extruded technique, has excellent barrier property, mechanical performance, mouldability
Can, heat sealability, and do not need to be additionally carried out combination process in process is not related to ink, adhesive, auxiliary agent equal solvent
Residue problem has been widely used in the fields such as food packaging, electronic packaging, medical packaging, especially food packaging applications.Cause
This is badly in need of a kind of multi-layer co-extruded functional package film of the high-barrier with UVResistant effect, improves the protectiveness of food packaging
Energy.
Summary of the invention
The object of the present invention is to provide a kind of multi-layer co-extruded functional package films of high-barrier with UVResistant effect.
It is a further object to provide the high-barrier multi-layer co-extruded functionality described in one kind with UVResistant effect
The preparation method of packaging film.
It is also another object of the present invention to provide the high-barrier multi-layer co-extruded functionality described in one kind with UVResistant effect
Packaging film is used for the purposes of food packaging.
To achieve the goals above, The technical solution adopted by the invention is as follows:
The first aspect of the invention provides a kind of multi-layer co-extruded functional package of the high-barrier with UVResistant effect
Film is followed successively by the first aramid layer, the first adhesive layer, the first polyolefin layer, the second adhesive layer, the second polyamide from top to bottom
Layer, high-obstruction, third aramid layer, third adhesive layer, the second polyolefin layer；
The high-obstruction uses raw material for EVOH (ethylene-vinyl alcohol copolymer), and wherein ethylene contents are 29%-
32%；
First aramid layer uses raw material for polyamide PA6, and fusing point is 220 DEG C；
First adhesive layer uses raw material for the polyethylene of maleic anhydride modified, and fusing point is 115-135 DEG C；
First polyolefin layer uses raw material for polyethylene and ultraviolet absorber, preferably linear low density polyethylene
(LLDPE), fusing point is 120~130 DEG C；
The ultraviolet absorber is salicylate type ultraviolet absorbent, at least one in benzophenone type ultraviolet absorbent
Kind；
Second adhesive layer uses raw material for the polyethylene of maleic anhydride modified, and fusing point is 115-135 DEG C；
Second aramid layer uses raw material for polyamide PA6, and fusing point is 220 DEG C；
The third aramid layer uses raw material for polyamide PA6, and fusing point is 220 DEG C；
The third adhesive layer uses raw material for the polyethylene of maleic anhydride modified, and fusing point is 115-135 DEG C；
Second polyolefin layer uses raw material for polyethylene, preferably metallocene PE (mLLDPE) and linear low close
The mass ratio of the mixture of degree polyethylene (LLDPE), mLLDPE and LLDPE are (3~5): (5~7)；Preferably 2:3.
The ultraviolet absorber is using polyolefin as carrier, and salicylic acid esters, benzophenone are made as additive
Resin, ultraviolet absorber add in the first polyolefin layer.
The additional amount of the ultraviolet absorber is the 0.5~2% of total film mass.
The multi-layer co-extruded functional package film of the high-barrier with UVResistant effect with a thickness of 140~160 μm, preferably
It is 150 μm.
The second aspect of the invention provides the multi-layer co-extruded functionality of high-barrier described in one kind with UVResistant effect
The preparation method of packaging film, comprising the following steps:
1) feed: use Weighing type flow control system and Weighing type raw material proportioning system, while raw material configure into
During entering extruder, remains that mixed material is in and continuously stir state, it is ensured that raw material uniformly mixes；
First aramid layer base polyamide is added in the hopper 1 of extruder, under conditions of temperature is 220-260 DEG C
Melting, into mouth mold；
First adhesive layer the polyethylene of raw material maleic anhydride modified is added in the hopper 2 of extruder, and temperature is
It is melted under the conditions of 195-220 DEG C, into mouth mold；
First polyolefin layer is added in the hopper 3 of extruder after mixing material polyethylene with ultraviolet absorber, and temperature is
It is melted under conditions of 170-195 DEG C, into mouth mold；
Second adhesive layer the polyethylene of raw material maleic anhydride modified is added in the hopper 4 of extruder, and temperature is
It is melted under conditions of 195-220 DEG C, into mouth mold；
Second aramid layer base polyamide is added in the hopper 5 of extruder, and temperature melts under the conditions of being 220-260 DEG C
Melt, into mouth mold；
High-obstruction raw material EVOH is added in the hopper 6 of extruder, and temperature melts under conditions of being 190-210 DEG C, into
Enter mouth mold；
Third aramid layer base polyamide is added in the hopper 7 of extruder, and temperature melts under the conditions of being 220-260 DEG C
Melt, into mouth mold；
Third adhesive layer the polyethylene of raw material maleic anhydride modified is added in the hopper 8 of extruder, and temperature is
It is melted under conditions of 195-220 DEG C, into mouth mold；
Second polyolefin layer material polyethylene is added in the hopper 9 of extruder, and temperature melts under the conditions of being 170-195 DEG C
Melt, into mouth mold；
2) extruder fusion plastification: each extruder carries out heating melting modeling to the feed particles in its loading hopper respectively
Change, and is squeezed out by die head；
3) die head blow extrusion: fusion is squeezed out in the extrusion multilayered molten raw material of die head, while inflation is carried out to film
Obtain film bubble；
4) water is cooling: the film bubble through die head blow extrusion carries out quenching sizing through supercooled water；
5) it draws and winding: being finally wound into film roll by traction through cooling film, acquisition is described to have uvioresistant effect
The multi-layer co-extruded functional package film of the high-barrier of fruit.
The third aspect of the invention provides the multi-layer co-extruded functionality of high-barrier described in one kind with UVResistant effect
Packaging film is used for the purposes of food packaging.
Due to the adoption of the above technical scheme, the present invention has the following advantages and beneficial effects:
The multi-layer co-extruded functional package film of high-barrier provided by the invention with UVResistant effect uses multi-layer co-extruded work
Skill production has excellent UVResistant effect, also has the performances outstanding such as high-barrier, the wet, puncture resistant of high resistant, is suitable for food
The fields such as packaging, electronic packaging, medical packaging, effective protection packaging in content.
Detailed description of the invention
Fig. 1 is the multi-layer co-extruded functional package film of the high-barrier with UVResistant effect prepared by the embodiment of the present invention 1
Schematic diagram.
Wherein, 11 be the first aramid layer, and 12 be the first adhesive layer, and 13 be the first polyolefin layer, and 14 be the second adhesive layer,
15 be the second aramid layer, and 16 be high-obstruction, and 17 be third aramid layer, and 18 be third adhesive layer, and 19 be the second polyolefin
Layer.
Specific embodiment
In order to illustrate more clearly of the present invention, below with reference to preferred embodiment, the present invention is described further.Ability
Field technique personnel should be appreciated that following specifically described content is illustrative and be not restrictive, this should not be limited with this
The protection scope of invention.
High-obstruction described in the embodiment of the present invention uses raw material for EVOH (ethylene-vinyl alcohol copolymer), wherein ethylene
Content is 29%-32%；First aramid layer uses raw material for polyamide PA6, and fusing point is 220 DEG C；First bonding
Layer uses raw material for the polyethylene of maleic anhydride modified, and fusing point is 115-135 DEG C；First polyolefin layer uses raw material
For polyethylene and ultraviolet absorber, preferably linear low density polyethylene (LLDPE), fusing point is 120~130 DEG C；It is described ultraviolet
Absorbent is at least one of salicylate type ultraviolet absorbent, benzophenone type ultraviolet absorbent；Second adhesive layer
Use raw material for the polyethylene of maleic anhydride modified, fusing point is 115-135 DEG C；Second aramid layer use raw material for
Polyamide PA6, fusing point are 220 DEG C；The third aramid layer uses raw material for polyamide PA6, and fusing point is 220 DEG C；Described
Three adhesive layers use raw material for the polyethylene of maleic anhydride modified, and fusing point is 115-135 DEG C；Second polyolefin layer is adopted
It is polyethylene with raw material, the preferably mixture of metallocene PE (mLLDPE) and linear low density polyethylene (LLDPE),
The mass ratio of mLLDPE and LLDPE is 2:3.The ultraviolet absorber is salicylic acid esters, hexichol first using polyolefin as carrier
Ketone adds in the first polyolefin layer as resin made of additive, ultraviolet absorber.The addition of the ultraviolet absorber
Amount is the 0.5~2% of total film mass.
Embodiment 1
A kind of preparation method of the multi-layer co-extruded functional package film of high-barrier with UVResistant effect, including following step
It is rapid:
1) feed: use Weighing type flow control system and Weighing type raw material proportioning system, while raw material configure into
During entering extruder, remains that mixed material is in and continuously stir state, it is ensured that raw material uniformly mixes.
First aramid layer base polyamide is added in the hopper 1 of extruder, under conditions of temperature is 220-260 DEG C
Melting, into mouth mold；
First adhesive layer the polyethylene (Tie) of raw material maleic anhydride modified is added in the hopper 2 of extruder, temperature
Degree melts under the conditions of being 195-220 DEG C, into mouth mold；
First polyolefin layer is added in the hopper 3 of extruder after mixing material polyethylene with ultraviolet absorber, and temperature is
It is melted under conditions of 170-195 DEG C, into mouth mold；
Second adhesive layer the polyethylene (Tie) of raw material maleic anhydride modified is added in the hopper 4 of extruder, temperature
Degree melts under conditions of being 195-220 DEG C, into mouth mold；
Second aramid layer base polyamide is added in the hopper 5 of extruder, and temperature melts under the conditions of being 220-260 DEG C
Melt, into mouth mold；
High-obstruction raw material EVOH is added in the hopper 6 of extruder, and temperature melts under conditions of being 190-210 DEG C, into
Enter mouth mold；
Third aramid layer base polyamide is added in the hopper 7 of extruder, and temperature melts under the conditions of being 220-260 DEG C
Melt, into mouth mold；
Third adhesive layer the polyethylene (Tie) of raw material maleic anhydride modified is added in the hopper 8 of extruder, temperature
Degree melts under conditions of being 195-220 DEG C, into mouth mold；
Second polyolefin layer material polyethylene is added in the hopper 9 of extruder, and temperature melts under the conditions of being 170-195 DEG C
Melt, into mouth mold；
2) extruder fusion plastification: each extruder carries out heating melting modeling to the feed particles in its loading hopper respectively
Change, and logical die head squeezes out；
3) fusion, while huffing device (inflation film manufacturing machine die head blow extrusion: are squeezed out in the extrusion multilayered molten raw material of die head
The ordinary device of extruder) film bubble is obtained to film progress inflation；
4) water ring (water ring is a ring device, is that Cooling Water uniformly cools down) is cooling: the film through die head blow extrusion
Bubble carries out quenching sizing by cooling water ring, the effective transparency and performance for improving film product.
5) traction and winding: draw by traction roller through cooling film and be finally wound into film roll, obtain the tool
There is the multi-layer co-extruded functional package film of the high-barrier of UVResistant effect, structure is as shown in Figure 1, Fig. 1 is prepared by the embodiment of the present invention 1
The multi-layer co-extruded functional package film of the high-barrier with UVResistant effect schematic diagram.
Comparative example 1
A kind of preparation method of the multi-layer co-extruded functional package film of high-barrier, comprising the following steps:
1) feed: use Weighing type flow control system and Weighing type raw material proportioning system, while raw material configure into
During entering extruder, remains that mixed material is in and continuously stir state, it is ensured that raw material uniformly mixes.
First aramid layer base polyamide is added in the hopper 1 of extruder, under conditions of temperature is 220-260 DEG C
Melting, into mouth mold；
First adhesive layer the polyethylene of raw material maleic anhydride modified is added in the hopper 2 of extruder, and temperature is
It is melted under the conditions of 195-220 DEG C, into mouth mold；
First polyolefin layer material polyethylene is added in the hopper 3 of extruder, under conditions of temperature is 170-195 DEG C
Melting, into mouth mold；
Second adhesive layer the polyethylene of raw material maleic anhydride modified is added in the hopper 4 of extruder, and temperature is
It is melted under conditions of 195-220 DEG C, into mouth mold；
Second aramid layer base polyamide is added in the hopper 5 of extruder, and temperature melts under the conditions of being 220-260 DEG C
Melt, into mouth mold；
High-obstruction raw material EVOH is added in the hopper 6 of extruder, and temperature melts under conditions of being 190-210 DEG C, into
Enter mouth mold；
Third aramid layer base polyamide is added in the hopper 7 of extruder, and temperature melts under the conditions of being 220-260 DEG C
Melt, into mouth mold；
Third adhesive layer the polyethylene of raw material maleic anhydride modified is added in the hopper 8 of extruder, and temperature is
It is melted under conditions of 195-220 DEG C, into mouth mold；
Second polyolefin layer material polyethylene is added in the hopper 9 of extruder, and temperature melts under the conditions of being 170-195 DEG C
Melt, into mouth mold；
2) extruder fusion plastification: each extruder carries out heating melting modeling to the feed particles in its loading hopper respectively
Change, and logical die head squeezes out；
3) die head blow extrusion: fusion is squeezed out in the extrusion multilayered molten raw material of die head, while huffing device is to film
It carries out inflation and obtains film bubble；
4) water ring is cooling: the film bubble through die head blow extrusion carries out quenching sizing by cooling water ring, effectively improves thin
The transparency and performance of film product.
5) traction and winding: draw by traction roller through cooling film and be finally wound into film roll, obtain the tool
There is the multi-layer co-extruded functional package film of the high-barrier of UVResistant effect.
The preparation method is the same as that of Example 1 for embodiment 2~4, and Examples 1 to 4 each component raw materials and consumption is shown in Table 1；Embodiment 1
The type of ultraviolet absorber and addition are shown in Table 1 in~4.
Table 1
The membrane structure of Examples 1 to 4 preparation are as follows: PA6/Tie/PE/Tie/PA6/EVOH/PA/Tie/PE, total thickness are
It 150 μm, is thrown according to the ratio of PA6:Tie:PE:Tie:PA6:EVOH:PA:Tie:PE=12:5:15:5:10:8:10:5:32
Material.
The performance test of the multi-layer co-extruded functional package film of the high-barrier with UVResistant effect of Examples 1 to 4 preparation
The results are shown in Table 1, and moisture-vapor transmission test method is ASTM F1249；OTR oxygen transmission rate test method is ASTM
D3985,200~400nm uv absorption rate test method are ASTM E903；From table 1 it follows that 200~400nm
Length ultraviolet absorbs up to 98%, OTR oxygen transmission rate≤3cc/m2D, moisture-vapor transmission≤4g/m2·d.Examples 1 to 4
Preparation the multi-layer co-extruded functional package film of the high-barrier with UVResistant effect found compared with product prepared by comparative example 1,
It joined ultraviolet absorber in the application, prepared product has good ultraviolet-resistent property, and is not added in comparative example 1 ultraviolet
Absorbent, so not having ultraviolet-resistent property.
The multi-layer co-extruded functional package film of high-barrier with UVResistant effect of the invention is used for the purposes of food packaging.
The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this patent
Member without departing from the scope of the present invention, when the technology contents using above-mentioned prompt make it is a little change or be modified to
The equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content, it is right according to the technical essence of the invention
Any simple modification, equivalent change and modification made by above embodiments, in the range of still falling within the present invention program.
Claims (10)
1. a kind of multi-layer co-extruded functional package film of high-barrier with UVResistant effect, it is characterised in that: from top to bottom successively
For the first aramid layer, the first adhesive layer, the first polyolefin layer, the second adhesive layer, the second aramid layer, high-obstruction, third
Aramid layer, third adhesive layer, the second polyolefin layer；
The high-obstruction uses raw material for EVOH；
First aramid layer uses raw material for polyamide PA6；
First adhesive layer uses raw material for the polyethylene of maleic anhydride modified；
First polyolefin layer uses raw material for polyethylene and ultraviolet absorber；
The ultraviolet absorber is at least one of salicylate type ultraviolet absorbent, benzophenone type ultraviolet absorbent；
Second adhesive layer uses raw material for the polyethylene of maleic anhydride modified；
Second aramid layer uses raw material for polyamide PA6；
The third aramid layer uses raw material for polyamide PA6；
The third adhesive layer uses raw material for the polyethylene of maleic anhydride modified；
Second polyolefin layer uses raw material for polyethylene.
2. the multi-layer co-extruded functional package film of the high-barrier according to claim 1 with UVResistant effect, feature exist
In: ethylene contents are 29%-32% in the EVOH.
3. the multi-layer co-extruded functional package film of the high-barrier according to claim 1 with UVResistant effect, feature exist
In: the fusing point of the polyamide PA6 is 220 DEG C.
4. the multi-layer co-extruded functional package film of the high-barrier according to claim 1 with UVResistant effect, feature exist
In: the fusing point of the polyethylene of the maleic anhydride modified is 115-135 DEG C.
5. the multi-layer co-extruded functional package film of the high-barrier according to claim 1 with UVResistant effect, feature exist
In: first polyolefin layer uses material polyethylene for linear low density polyethylene, and fusing point is 120~130 DEG C.
6. the multi-layer co-extruded functional package film of the high-barrier according to claim 1 with UVResistant effect, feature exist
In: second polyolefin layer uses raw material for the mixture of metallocene PE and linear low density polyethylene.
7. the multi-layer co-extruded functional package film of the high-barrier according to claim 6 with UVResistant effect, feature exist
In: the metallocene PE and the mass ratio of linear low density polyethylene be (3~5): (5~7).
8. the multi-layer co-extruded functional package film of the high-barrier according to claim 1 with UVResistant effect, feature exist
In: the ultraviolet absorber is using polyolefin as carrier, and salicylic acid esters, benzophenone are as tree made of additive
Rouge；
The additional amount of the ultraviolet absorber is the 0.5~2% of total film mass；
The multi-layer co-extruded functional package film of the high-barrier with UVResistant effect with a thickness of 140~160 μm.
9. a kind of multi-layer co-extruded functional package film of the described in any item high-barriers with UVResistant effect of claim 1 to 8
Preparation method, it is characterised in that: the following steps are included:
1) it feeds: using Weighing type flow control system and Weighing type raw material proportioning system, while configuring in raw material to entrance and squeezing
Out during machine, remains that mixed material is in and continuously stir state, it is ensured that raw material uniformly mixes；
First aramid layer base polyamide is added in the hopper 1 of extruder, and temperature melts under conditions of being 220-260 DEG C,
Into mouth mold；
First adhesive layer the polyethylene of raw material maleic anhydride modified is added in the hopper 2 of extruder, temperature 195-
It is melted under the conditions of 220 DEG C, into mouth mold；
First polyolefin layer is added in the hopper 3 of extruder, temperature 170- after mixing material polyethylene with ultraviolet absorber
It is melted under conditions of 195 DEG C, into mouth mold；
Second adhesive layer the polyethylene of raw material maleic anhydride modified is added in the hopper 4 of extruder, temperature 195-
It is melted under conditions of 220 DEG C, into mouth mold；
Second aramid layer base polyamide is added in the hopper 5 of extruder, and temperature melts under the conditions of being 220-260 DEG C, into
Enter mouth mold；
High-obstruction raw material EVOH is added in the hopper 6 of extruder, and temperature melts under conditions of being 190-210 DEG C, inlet port
Mould；
Third aramid layer base polyamide is added in the hopper 7 of extruder, and temperature melts under the conditions of being 220-260 DEG C, into
Enter mouth mold；
Third adhesive layer the polyethylene of raw material maleic anhydride modified is added in the hopper 8 of extruder, temperature 195-
It is melted under conditions of 220 DEG C, into mouth mold；
Second polyolefin layer material polyethylene is added in the hopper 9 of extruder, and temperature melts under the conditions of being 170-195 DEG C, into
Enter mouth mold；
2) extruder fusion plastification: each extruder carries out heating melting plasticizing to the feed particles in its loading hopper respectively, and
It is squeezed out by die head；
3) die head blow extrusion: fusion is squeezed out in the extrusion multilayered molten raw material of die head, while inflation is carried out to film and is obtained
Film bubble；
4) water is cooling: the film bubble through die head blow extrusion carries out quenching sizing through supercooled water；
5) it draws and winds: being finally wound into film roll by drawing through cooling film, with UVResistant effect described in acquisition
The multi-layer co-extruded functional package film of high-barrier.
10. a kind of multi-layer co-extruded functional package film of the described in any item high-barriers with UVResistant effect of claim 1 to 8
Purposes for food packaging.
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| CN112060736A (en) * | 2020-09-10 | 2020-12-11 | 安徽源洲包装材料有限公司 | Plastic composite film and production equipment thereof |
| CN112060728A (en) * | 2020-08-27 | 2020-12-11 | 上海春宜药品包装材料有限公司 | High-barrier film for medicine packaging and preparation method thereof |
| CN113619059A (en) * | 2021-08-12 | 2021-11-09 | 天津新兴东方临近空间航天科技有限公司 | Ultraviolet aging resistant fluororesin helium barrier film multilayer co-extrusion film process |
| CN114407463A (en) * | 2021-12-22 | 2022-04-29 | 北京工商大学 | Anti-ultraviolet multilayer protective film for pipeline repair by in-situ curing method for trenchless repair and preparation method thereof |
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Application publication date: 20190301 |