CN109591415A - A kind of high-isolation film and preparation method of the online longitudinal stretching of multi-layer co-extruded blown film - Google Patents
A kind of high-isolation film and preparation method of the online longitudinal stretching of multi-layer co-extruded blown film Download PDFInfo
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
-
- 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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
- B29C2071/022—Annealing
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
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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
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7244—Oxygen barrier
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7246—Water vapor barrier
-
- 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
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
- B32B2439/60—Bottles
Abstract
A kind of high-isolation film of the online longitudinal stretching of multi-layer co-extruded blown film, the structure of the high-isolation film are the symmetrical structure of A/B/C/B/A, and the A is outer layer, the B is adhesive layer, and the C is middle layer, specific structure PA/TIE/EVOH/TIE/PA, wherein, the PA is nylon material；The TIE is maleic anhydride modified polyolefine material；The EVOH is ethylene-vinyl alcohol copolymer.Longitudinal stretching >=1.5 times in the preparation method of the high-isolation film.The high-isolation film has good moisture barrier and tolerance, online longitudinal stretching (MDO), so that the oxygen resistance of EVOH greatly improves, so that oxygen resistance of the EVOH under high relative humidity conditions significantly improves, the transparency of co-extrusion film is significantly improved, the overall cost of high-barrier packaging can be effectively reduced.
Description
Technical field
The invention belongs to field thin film technique field, in particular to a kind of height of the online longitudinal stretching of multi-layer co-extruded blown film
Barrier film and preparation method.
Background technique
As consumption upgrades, people have more understanding to quality of life, and high-isolation film also receives everybody extensive
Pay attention to, for the packaging of Special food: the perishable food such as meat and sausage needs the packaging of high obstructing performance to ensure it
Edible safety, therefore high-isolation film has been more and more widely used.
EVOH (ethylene-vinyl alcohol copolymer) as a kind of heatmeltable barrier resins have excellent performance, environment amenable,
Increasingly consequence is alsied occupy inside high barrier material, especially under the present circumstances, for Environmental Factors, PVDC
The biaxial tension barrier film of (polyvinylidene chloride) coating is by more and more application limitations.But EVOH material one itself
A little weakness, as very fast, the traditional coextrusion film blowing material of oxygen barrier property decline is thick under material price valuableness, high relative humidities
Degree is big, is not suitable for material blushing under the conditions of high speed printing, high temperature sterilization.So providing a kind of Thermal Resistant Surface, high humility item
The EVOH high-isolation film and preparation method that barriering effect is good under part, transparency is high, flexibility is good, thickness is small have important valence
Value.
Summary of the invention
The present invention contains EVOH and PA (nylon in view of the deficienciess of the prior art, providing the completely new symmetrical structure of one kind
Material) the online longitudinal stretching of multi-layer co-extruded blown film high-isolation film and preparation method, the high-isolation film have high humidity
The advantages that barriering effect is good under the conditions of degree, transparency is high, flexibility is good, thickness is small, can the comprehensive current EVOH material of solution answer
With problems faced in the process.
The technical scheme to solve the above technical problems is that a kind of online longitudinal stretching of multi-layer co-extruded blown film
High-isolation film, the structure of the high-isolation film are the symmetrical structure of A/B/C/B/A, and the A is outer layer, and the B is bonding
Layer, the C be middle layer, specific structure such as following formula (I):
PA/TIE/EVOH/TIE/PA formula (I)
In the formula (I), the PA is nylon material, provides physical strength for entirety high-isolation film, prints, is compound
Thermal Resistant Surface during applicability and packaging applications, such as the Thermal Resistant Surface in bag making process；
The TIE is maleic anhydride modified polyolefine material, and the layer is in addition to providing adhesive function, to whole high-barrier
Membrane structure provides the barriers function to moisture, provides good protection for EVOH；
The EVOH is ethylene-vinyl alcohol copolymer, which provides high-barrier function for high-isolation film.
Further, the PA is homopolymerization nylon or copolymer nylon；
Further, the homopolymerization nylon is PA6；The copolymer nylon is PA666, so that it is total to reduce high-isolation film
Body melt processing temperature improves high-isolation film production stability and improves the transparency and flexibility of high-isolation film.
Further, the TIE is maleic anhydride modified polyethylene, maleic anhydride modified polypropylene, maleic anhydride
The mixing material of modified polyethylene and polyethylene or maleic anhydride modified polypropylene and polyacrylic mixing material.
Wherein, the mixing material conduct of maleic anhydride modified polyethylene or maleic anhydride modified polyethylene and polyethylene
TIE layers, the application under the conditions of high-isolation film capable of being made to be more suitable for cryogenic freezing；Maleic anhydride modified polypropylene or Malaysia
Anhydride modified polypropylene and polyacrylic mixing material make high-isolation film can be used in having superior heat resistance as TIE layers
It is required that product, the application being more suitable under the conditions of high temperature sterilization.
Further, the amorphism nylon material of 10%-20% parts by weight is added in the PA, it is preferred that described
Amorphism nylon material is the EMS G21 of EMS Company, Switzerland.To improve high-isolation film transparency, enhance drawing and forming
Effect, and the applicability to high humidity environment.
Further, the amorphism nylon material of≤30% parts by weight is added in the EVOH, it is preferred that described is non-
Crystallinity nylon material is the SELAR PA 2272 of E.I.Du Pont Company.So as to improve high-isolation film humidity environment oxygen blocking
Every property.
Further, according to the symmetrical structure of A/B/C/B/A, the coextrusion film blowing that can use more numbers of plies is longitudinally drawn online
System, such as PA/TIE/PA/EVOH/PA/TIE/PA are stretched, the cost of product further can be effectively controlled, which makes high resistant
It is more suitable the packaging product for having drawing and forming requirement every film.
The present invention also provides a kind of high-isolation films of multi-layer co-extruded online longitudinal stretching of blown film (MDO)
The material of PA, PIE and EVOH are placed in the feed bin of high-isolation film process units by preparation method, are heated by extruder molten
It squeezes out, propels the price of than being 1.8 from die head after melting, blow out film bubble through automatic air ring, film bubble adjusts thickness through a thickness measuring module thickness measuring
Afterwards, it is drawn roller mechanism and rolls traction to pre- hot-rolling, hauling speed is 60 ms/min, and preheating temperature is 80-90 DEG C, film warp
The online longitudinal stretching of draw roll, draw ratio are >=1.5, and online longitudinal drawing temperature is 95-100 DEG C, thin after the completion of stretching
The annealed roller annealing of film, chill roll are cooling, and annealing temperature is 100 DEG C -105 DEG C, and cooling temperature is 30 DEG C, film warp after cooling
It after secondary thickness measuring module thickness measuring, is wound into rolling-up mechanism, obtains the height of the online longitudinal stretching of multi-layer co-extruded blown film
Barrier film.
For EVOH and PA as barrier material after the pressure of longitudinal stretching (MDO) orientation, crystal arrangement is more regular, into
And improve the barrier property for oxygen and vapor；The monosymmetric TIE polyolefine modified material of EVOH material, is passing through
After the pressure orientation of longitudinal stretching (MDO), the barrier property for moisture is further improved.
Longitudinal stretching multiple >=1.5 significantly improve the barrier property of the high-isolation film；Make the longitudinal direction of high-isolation film
Tensile strength significantly improves, and is suitable for printing, process is processed after compound grade；Mention the thickness uniformity of high-isolation film significantly
It is high；Significantly improve the high-isolation film under high relative humidity environment to the barrier property of oxygen；Make the high-isolation film
Transparency significantly improves.In addition, longitudinal stretching multiple >=1.5 are reaching identical resistance compared with traditional EVOH blown film mode
In the case of effect, this method largely saves the application of raw material, to more environment-friendly；And the high-isolation film can subtract
The phenomenon that light EVOH material whitens in high-temperature sterilization process.
The beneficial effects of the present invention are:
Barriering effect is good under high humidity conditions, transparency is high, flexibility is good, thickness is thin for the high-isolation film, has print
Brush, compound applicability and Thermal Resistant Surface, can problems faced in the comprehensive current EVOH material application process of solution.
Using identical material, the oxygen-barrier property of high-isolation film of the invention is greatly improved, thin under high humidity
Film oxygen-barrier property significantly improves, and film thickness is greatly decreased；Under the conditions of identical oxygen obstruction, high-isolation film of the invention
Oxygen barrier material dosage substantially reduce, so as to reduce packing cost；The thickness uniformity of film is more preferable, and longitudinal tensile strength is big
Width improves, conducive to the high-speed production of rear process processing.
Relative to existing BOPA (BON biaxially oriented nylon film) and its coated thin film, obtained under than relatively thin depth information
High-isolation film is obtained, there is good moisture barrier and tolerance, online longitudinal stretching (MDO), so that the oxygen barrier of EVOH
It can greatly improve, so that oxygen resistance of the EVOH under high relative humidity conditions significantly improves, significantly improve co-extrusion film
Transparency can effectively reduce the overall cost of high-barrier packaging.
Detailed description of the invention
Fig. 1 is membrane structure schematic diagram in embodiment 1-2；
Fig. 2 is film production flow diagram in embodiment 1-2；
In figure, 1EVOH, 2TIE, 3PA, 4 feed bins, 5 extruders, 6 die heads, 7 automatic air rings, 8 film bubbles, 9 thickness measuring moulds
Block, 10 traction roller mechanisms, 11 pre- hot-rollings, 12 draw rolls, 13 lehr rollers, 14 chill rolls, 15 2 thickness measuring modules, 16 wind-up rolls.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below to specific reality of the invention
The mode of applying is described in detail.In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention.But
The invention can be embodied in many other ways as described herein, and those skilled in the art can be without prejudice to this hair
Similar improvement is done in the case where bright intension, therefore the present invention is not limited by the specific embodiments disclosed below.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more
Any and all combinations of relevant listed item.
Embodiment 1
A kind of high-isolation film of 5 containing the EVOH and PA layer coextrusion online longitudinal stretching of blown film (MDO), structure is as schemed
Shown in 1, PA/TIE/EVOH/TIE/PA, layers of material selects and thickness allocation proportion such as the following table 1.
The raw material proportioning table of 1 embodiment of table, 1 high-isolation film
In table 1, F136E2 is the PA6 homopolymerization nylon of Royal DSM；RB707CF is the binary random copolymerization third of Northern Europe chemistry
Alkene；41E687 is the binder resin of Du Pont, belongs to a kind of maleic anhydride modified polyolefine material；F171B is Kuraray EVOH
Resin, ethylene contents therein are 32% (mol%), belong to a kind of ethylene-vinyl alcohol copolymer.
A kind of system of the high-isolation film of above-mentioned 5 containing the EVOH and PA layer coextrusion online longitudinal stretching of blown film (MDO)
Standby process is as shown in Fig. 2, specific preparation process is as described below:
It is 30 μm according to film thickness before stretching, the number of plies is 5 layers and weighs each raw material, is placed in feed bin 4, the modeling in feed bin 4
Expect that particle squeezes out after 5 heating melting of extruder from die head 6, propels the price of than being 1.8, film original depth sets 30 microns, traction
Speed is 60 ms/min, about 360 kgs/hour of extrusion output, blows out film bubble 8 through automatic air ring 7, film bubble 8 is through a thickness measuring module
After 9 thickness measurings adjust thickness, is drawn roller mechanism 10 and roll traction to pre- hot-rolling 11, the temperature of pre- hot-rolling 11 is set as 80 DEG C, film
Drawn roller 12 carries out online longitudinal stretching, draw ratio 1.76 at 95 DEG C, and stretched film has stretched with a thickness of 17um
Film after is annealed through 100 DEG C of lehr rollers 13,30 DEG C of chill rolls 14 are cooling, and film after cooling is surveyed through secondary thickness measuring module 15
After thickness, is wound into rolling-up mechanism 16, obtain high-isolation film product.
Embodiment 2
A kind of high-isolation film of 5 containing the EVOH and PA layer coextrusion online longitudinal stretching of blown film (MDO), structure is as schemed
Shown in 1, PA/TIE/EVOH/TIE/PA, layers of material selects and thickness allocation proportion such as the following table 2.
The raw material proportioning table of 2 embodiment of table, 2 high-isolation film
F136E2 is the PA6 homopolymerization nylon of Royal DSM in table 2；RB707CF is the binary random copolymerization propylene of Northern Europe chemistry；
41E687 is the binder resin of Du Pont, belongs to a kind of maleic anhydride modified polyolefine material；F171B is Kuraray EVOH tree
Rouge, ethylene contents therein are 32% (mol%), belong to a kind of ethylene-vinyl alcohol copolymer；G21 is the EMS of EMS company
G21 belongs to amorphism nylon material；SELAR PA 2272 is the SELAR PA 2272 of E.I.Du Pont Company, belongs to amorphism
Nylon material.
According to data in table 2, the preparation of high-isolation film in the present embodiment is carried out according to the method for embodiment 1, distinguishes it
It is in draw ratio 1.80.
Embodiment 3
Film is prepared using identical raw material in embodiment 1 and identical thickness allocation proportion, film product overall thickness is
30 μm, difference is not stretched in film in this present embodiment.
Embodiment 4
Film is prepared using identical raw material in embodiment 1 and identical thickness allocation proportion, film product overall thickness is
17 μm, difference is not stretched in film in this present embodiment.
The film product of embodiment 1-4 is subjected to main performance test, specific test data is as shown in table 3:
3 embodiment 1-4 film product performance test data of table
In table 3, OTR1Test condition are as follows: 23 DEG C of temperature, relative humidity 0%；OTR2Test condition are as follows: 23 DEG C of temperature,
Relative humidity 50%；OTR3Test condition are as follows: 40 DEG C of temperature, relative humidity 90%.
It can be seen from the data in Table 3 that the PA/TIE/EVOH/TIE/PA film of same thickness, (implements through longitudinal stretching
Example 1 and embodiment 2) obtained high-isolation film, OTR oxygen transmission rate is significantly lower than the film (embodiment obtained without longitudinal stretching
4).Embodiment 1 is compared with embodiment 4, and under the conditions of 23 DEG C of temperature, relative humidity 0%, the barrier property of oxygen is improved about
28.8%；Under the conditions of 23 DEG C of temperature, relative humidity 50%, about 28.9% is improved for the barrier property of oxygen；In temperature 40
DEG C, under the conditions of the high temperature and humidity of relative humidity 90%, about 71.5% is improved for the barrier property of oxygen；Meanwhile physical
Energy aspect, longitudinal tensile strength improve about 67.8%.
In addition, taking existing K-BOPA (nylon membrane), which is that PVDC (polyvinylidene chloride) is coated with 15 μm
BOPA (BON biaxially oriented nylon film), figure layer is with a thickness of 1.5 μm.By the performance detection data of the K-BOPA with embodiment 1-2's
High-isolation film product compares, specific data such as the following table 4.
The high-isolation film properties of product test data of table 4K-BOPA and embodiment 1-2
It can be seen from the data in Table 3 that the high-isolation film that embodiment 1 obtains is compared with existing K-BOPA, same weight
The film of amount, the more existing K-BOPA of embodiment 1 have more about 14% square metre number.
Found out by the above comparative example, coextrusion blown film in a kind of 5 containing EVOH and PA layer of the present invention is longitudinally drawn online
The high-isolation film for stretching (MDO) can reach same or better with smaller film thickness in contrast to common EVOH coextruded film
Barriering effect, while the more and more restricted PVDC coated thin film due to environmental protection being replaced also to have very big advantage.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. a kind of high-isolation film of the online longitudinal stretching of multi-layer co-extruded blown film, which is characterized in that the high-isolation film
Structure is the symmetrical structure of A/B/C/B/A, and the A is outer layer, and the B is adhesive layer, and the C is middle layer, and specific structure is such as
Following formula (I):
PA/TIE/EVOH/TIE/PA formula (I)
In the formula (I), the PA is nylon；The TIE is maleic anhydride modified polyolefine material；The EVOH is second
Alkene-ethenol copolymer.
2. a kind of high-isolation film of multi-layer co-extruded online longitudinal stretching of blown film according to claim 1, feature exist
In the PA is homopolymerization nylon or copolymer nylon.
3. a kind of high-isolation film of multi-layer co-extruded online longitudinal stretching of blown film according to claim 2, feature exist
In the homopolymerization nylon is PA6 or PA612；The copolymer nylon is PA666.
4. a kind of high-isolation film of multi-layer co-extruded online longitudinal stretching of blown film according to claim 1, feature exist
In, the TIE be maleic anhydride modified polyethylene, maleic anhydride modified polypropylene, maleic anhydride modified polyethylene with
The mixing material of polyethylene or maleic anhydride modified polypropylene and polyacrylic mixing material.
5. a kind of high-isolation film of multi-layer co-extruded online longitudinal stretching of blown film according to claim 1, feature exist
In the amorphism nylon material of addition 10%-20% parts by weight in the PA.
6. a kind of high-isolation film of multi-layer co-extruded online longitudinal stretching of blown film according to claim 5, feature exist
In the amorphism nylon material is EMS G21.
7. a kind of high-isolation film of multi-layer co-extruded online longitudinal stretching of blown film according to claim 1, feature exist
In the amorphism nylon material of≤30% parts by weight of addition in the EVOH.
8. a kind of high-isolation film of multi-layer co-extruded online longitudinal stretching of blown film according to claim 7, feature exist
In the amorphism nylon material is SELAR PA 2272.
9. a kind of high-isolation film of the multi-layer co-extruded online longitudinal stretching of blown film described in a kind of claim 1-8 any one
Preparation method, which is characterized in that the material of PA, PIE and EVOH are placed in the feed bin of high-isolation film process units, pass through
It is squeezed out after extruder heating melting from die head, propels the price of than being 1.8, blow out film bubble through automatic air ring, film bubble is through a thickness measuring module
After thickness measuring adjusts thickness, is drawn roller mechanism and roll traction to pre- hot-rolling, hauling speed is 60 ms/min, preheating temperature 80-
90 DEG C, the online longitudinal stretching of film drawn roller, draw ratio is >=1.5, and online longitudinal drawing temperature is 95-100 DEG C, is stretched
The annealed roller annealing of film after the completion, chill roll are cooling, and annealing temperature is 100 DEG C -105 DEG C, and cooling temperature is 30 DEG C, cooling
Film afterwards is wound after secondary thickness measuring module thickness measuring into rolling-up mechanism, is obtained the multi-layer co-extruded blown film and is indulged online
To the high-isolation film of stretching.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113696579A (en) * | 2021-09-03 | 2021-11-26 | 山东永聚医药科技有限公司 | High-barrier puncture-resistant membrane material for biopharmaceutical process and preparation process thereof |
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| CN114670520A (en) * | 2022-03-31 | 2022-06-28 | 合肥无涯科技有限公司 | High-barrier puncture-resistant membrane material for bioprocess bag and preparation method thereof |
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| EP4163104A1 (en) | 2021-10-05 | 2023-04-12 | Flexopack S.A. | Multilayer monoaxially oriented crosslinked film and process |
| CN114228288A (en) * | 2021-11-24 | 2022-03-25 | 成都慧成科技有限责任公司 | High-oxygen-resistance biaxially oriented high-density polyethylene film and preparation method thereof |
| CN114670520A (en) * | 2022-03-31 | 2022-06-28 | 合肥无涯科技有限公司 | High-barrier puncture-resistant membrane material for bioprocess bag and preparation method thereof |
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