CN110481128A - A kind of vacuum bag film and preparation method thereof with two-sided release function - Google Patents
A kind of vacuum bag film and preparation method thereof with two-sided release function Download PDFInfo
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- CN110481128A CN110481128A CN201910740927.1A CN201910740927A CN110481128A CN 110481128 A CN110481128 A CN 110481128A CN 201910740927 A CN201910740927 A CN 201910740927A CN 110481128 A CN110481128 A CN 110481128A
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- vacuum bag
- tie
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- film
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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
-
- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
Abstract
The invention discloses a kind of vacuum bag films with two-sided release function, by being formed after PE, Tie, PA mixing using multilayer material coextrusion blow, comprising: PE:40~65 part；PA:30~55 part；Tie:2~4 part；Color masterbatch: 0.1~2 part；Other auxiliary agents: 0.1~2 part；Wherein, PA is the copolymer of PA6 and PA66, and PE layer material is the mixture of LDPE and HDPE, mixed proportion are as follows: HDPE:15~40 part；LDPE:60~85 part；The interlayer of multilayer material designs are as follows: five-layer co-squeezing PE/Tie/PA/Tie/PE.The invention also discloses preparation methods.The present invention not only meets the air-tightness requirement of vacuum bag film itself, and also with the isolation features of isolation film, resin can be isolated, and has good release effect and excellent mechanical property.
Description
Technical field
The present invention relates to vacuum bag film applications, and in particular to a kind of vacuum bag film with two-sided release function and its
Preparation method.
Background technique
In composite material shaping process, vacuum bag film plays the role of sealing function, and isolation film plays isolation resin.
But with the continuous development of moulding process, in order to reduce material cost and cost of labor, more and more composite materials as far as possible
Manufacturer tends to carry out vacuum forming using single film, and this requires films not only to have good leakproofness, also to have
Relatively good isolation and release.During vacuum-bag process, the effect of vacuum bag film is no longer single, but
The characteristics of needing compatible isolation film can thus reduce the dosage of isolation film, reduce laying process, save the process time, mention
High efficiency.
Summary of the invention
It is a kind of with two-sided isolation function it is an object of the present invention to being provided for the problems of prior art
The vacuum bag film of energy.The second object of the present invention is kind of a preparation method for the vacuum bag film with two-sided isolation features.
Vacuum bag film of the invention is not only able to satisfy vacuum bag by formula and multi-layer co-extruded and interlayer space design
Resin can be isolated also with the isolation features of isolation film for the air-tightness requirement of film itself, and have good release effect
Fruit and excellent mechanical property.
One of in order to achieve the object of the present invention, used technical solution is:
A kind of vacuum bag film with two-sided release function, by being blown after PE, Tie, PA mixing using multilayer material co-extrusion
It moulds, the interlayer design of the multilayer material are as follows: five-layer co-squeezing PE/Tie/PA/Tie/PE, wherein the PA is PA6
With the copolymer of PA66, the PE layer material is the mixture of LDPE and HDPE.
A kind of vacuum bag film with two-sided release function, by using multilayer material after the raw material mixing of following weight point
Coextrusion blow forms, comprising:
PE:40~65 part；
PA:30~55 part；
Tie:2~4 part；
Color masterbatch: 0.1~2 part；
Other auxiliary agents: 0.1~2 part；
The PA is the copolymer of PA6 and PA66；
The PE layer material is the mixture of LDPE and HDPE, mixed proportion are as follows:
HDPE:15~40 part；
LDPE:60~85 part；
The interlayer of the multilayer material designs are as follows: five-layer co-squeezing PE/Tie/PA/Tie/PE.
In a preferred embodiment of the invention, other described auxiliary agents include: slipping agent, antioxidant, heat stabilizer,
Any one or more in antistatic agent can improve the auxiliary agent of processing film processability and film comprehensive performance.
In a preferred embodiment of the invention, the vacuum bag film with two-sided release function is by following weight
The raw material mixing of part is blow molded:
PE:57 parts；
PA:39 parts；
Tie:3 parts；
Color masterbatch: 0.3 part；
Other auxiliary agents: 0.7 part；
Wherein, it is 1:3 that PE layers of the ratio, which is HDPE:LDPE,.
In order to achieve the object of the present invention two, used technical solution is:
A kind of preparation method of the vacuum bag film with two-sided release function, comprising the following steps:
Raw material is matched out first, in accordance with above-mentioned component weight ratio, raw material is packed into helical plastic extruder by interlayer structure
In hopper；
It is then passed through helical plastic extruder plastifying fusion, in the barrel internal pressure and its screw rod of helical plastic extruder
Under forward thrust, the raw material of melt shape is transported to five-layer co-squeezing and goes out at the die head of inflation film manufacturing machine, after die head is compound with
And tubular vacuum bag film is blown at mouth mold.
In a preferred embodiment of the invention, the PE layer extruder temperature of the screw rod plastic extruder be 200 DEG C~
240 DEG C, 35~55rpm of revolving speed.
In a preferred embodiment of the invention, the Tie layer bar temperature of the screw rod plastic extruder be 200 DEG C~
240 DEG C, 15~35rpm of revolving speed.
In a preferred embodiment of the invention, the PA layer extruder temperature of the screw rod plastic extruder be 220 DEG C~
255 DEG C, 30~60rpm of revolving speed.
In a preferred embodiment of the invention, 235 DEG C of the temperature of the inflation film manufacturing machine of the screw rod plastic extruder
~255 DEG C, blow-up ratio 1.3~2.0,50~100 μm of film thickness, 10~40m/min of draw off rate.
The beneficial effects of the present invention are:
The present invention not only meets the air-tightness requirement of vacuum bag film itself, also with the isolation features of isolation film,
Resin can be isolated, and there is good release effect and excellent mechanical property.
Specific embodiment
In order to make the technological means realized of the present invention, creation characteristic reaches purpose and effect is easy to understand, below into
The elaboration of one step is of the invention, and in following all examples, component content selects parts by weight.
The English of vacuum bag film of the invention is Vacuum Bag Film, can abbreviation VBF, vacuum bag of the invention is thin
Film has two-sided release function, the air-tightness requirement of vacuum bag film itself is not only able to satisfy, also with the isolation of isolation film
Resin can be isolated for function, and have good release effect and excellent mechanical property, below low suitable for 120 DEG C
Temperature solidification vacuum forming.
Embodiment 1
PE:40 parts；
PA:55 parts；
Tie:3 parts；
Color masterbatch: 1 part；
Other auxiliary agents: 1 part；
PE layers HDPE:15 parts of ratio, LDPE:85 parts.
Step:
Raw material is matched out according to above-mentioned component weight ratio, raw material is packed into the hopper of helical plastic extruder by interlayer structure
In, by helical plastic extruder plastifying fusion, push away the barrel internal pressure and its screw rod of helical plastic extruder are forward
Under power effect, the raw material of melt shape is transported to five-layer co-squeezing and goes out at the die head of inflation film manufacturing machine, after die head is compound and at mouth mold
It is blown into tubular vacuum bag film.The PE layer extruder temperature of screw rod plastic extruder is 220 DEG C, revolving speed 46rpm；Tie layers of bar temperature
Degree is 220 DEG C, revolving speed 25rpm；PA layers of extruder temperature are 240 DEG C, revolving speed 35rpm；240 DEG C of the temperature of the inflation film manufacturing machine, inflation
Than 1.5,75 μm of film thickness, draw off rate 15m/min.
Film stretchability energy parameter such as the following table 1 that embodiment 1 obtains
Table 1
It is tested by release and isolation, vacuum bag film can be easily detached from from product upper and lower surface very much, and nothing
Resin overflows.
Laying is carried out by layer paving technique, vacuumizing ensures that vacuum degree not less than 0.095MPa, closes vaccum-pumping equipment,
Gas leakage detection is carried out after 10min, vacuum degree, which reduces, is no more than 0.015MPa；6H is kept the temperature at 120 DEG C, after cooling, vacuum degree is
0.089MPa。
Embodiment 2
PE:65 parts；
PA:32 parts；
Tie:2 parts；
Color masterbatch: 0.5 part；
Other auxiliary agents: 0.5 part；
PE layers HDPE:35 parts of ratio, LDPE:65 parts.
Step: matching out raw material according to above-mentioned component weight ratio, and raw material is packed into helical plastic extruder by interlayer structure
Hopper in, by helical plastic extruder plastifying fusion, helical plastic extruder barrel internal pressure and its screw rod to
Under preceding thrust, the raw material of melt shape is transported to five-layer co-squeezing and goes out at the die head of inflation film manufacturing machine, after die head is compound and
Tubular vacuum bag film is blown at mouth mold.The PE layer extruder temperature of screw rod plastic extruder is 225 DEG C, revolving speed 35rpm；Tie
Layer bar temperature is 225 DEG C, revolving speed 20rpm；PA layers of extruder temperature are 245 DEG C, revolving speed 50rpm；The temperature 245 of the inflation film manufacturing machine
DEG C, blow-up ratio 1.6,90 μm of film thickness, draw off rate 20m/min.
Film stretchability energy parameter such as the following table 2 that embodiment 2 obtains
Table 2
It is tested by release and isolation, vacuum bag film can be easily detached from from product upper and lower surface very much, and nothing
Resin overflows.
Laying is carried out by layer paving technique, vacuumizing ensures that vacuum degree not less than 0.095MPa, closes vaccum-pumping equipment,
Gas leakage detection is carried out after 10min, vacuum degree, which reduces, is no more than 0.015MPa；6H is kept the temperature at 120 DEG C, after cooling, vacuum degree is
0.080MPa。
Embodiment 3
PE:57 parts；
PA:39 parts；
Tie:3 parts；
Color masterbatch: 0.3 part；
Other auxiliary agents: 0.7 part；
PE layers HDPE:25 parts of ratio, LDPE:75 parts.
Step:
Raw material is matched out according to above-mentioned component weight ratio, raw material is packed into the hopper of helical plastic extruder by interlayer structure
In, by helical plastic extruder plastifying fusion, push away the barrel internal pressure and its screw rod of helical plastic extruder are forward
Under power effect, the raw material of melt shape is transported to five-layer co-squeezing and goes out at the die head of inflation film manufacturing machine, after die head is compound and at mouth mold
It is blown into tubular vacuum bag film.The PE layer extruder temperature of screw rod plastic extruder is 215 DEG C, revolving speed 40rpm；Tie layers of bar temperature
Degree is 215 DEG C, revolving speed 20rpm；PA layers of extruder temperature are 240 DEG C, revolving speed 52rpm；240 DEG C of the temperature of the inflation film manufacturing machine, inflation
Than 1.4,110 μm of film thickness, draw off rate 30m/min.
Film stretchability energy parameter such as the following table 3 that embodiment 3 obtains
Table 3
It is tested by release and isolation, vacuum bag film can be easily detached from from product upper and lower surface very much, and nothing
Resin overflows.
Laying is carried out by layer paving technique, vacuumizing ensures that vacuum degree not less than 0.095MPa, closes vaccum-pumping equipment,
Gas leakage detection is carried out after 10min, vacuum degree, which reduces, is no more than 0.015MPa；6H is kept the temperature at 120 DEG C, after cooling, vacuum degree is
0.082MPa。
Embodiment 4
PE:50 parts
PA:45 parts
Tie:4 parts
Color masterbatch: 0.2 part
Other auxiliary agents: 0.8 part
PE layers HDPE:40 parts of ratio, LDPE:60 parts
Step: matching out raw material according to above-mentioned component weight ratio, and raw material is packed into helical plastic extruder by interlayer structure
Hopper in, by helical plastic extruder plastifying fusion, helical plastic extruder barrel internal pressure and its screw rod to
Under preceding thrust, the raw material of melt shape is transported to five-layer co-squeezing and goes out at the die head of inflation film manufacturing machine, after die head is compound and
Tubular vacuum bag film is blown at mouth mold.The PE layer extruder temperature of screw rod plastic extruder is 210 DEG C, revolving speed 38rpm；Tie
Layer bar temperature is 210 DEG C, revolving speed 15rpm；PA layers of extruder temperature are 250 DEG C, revolving speed 60rpm；The temperature 250 of the inflation film manufacturing machine
DEG C, blow-up ratio 1.8,75 μm of film thickness, draw off rate 40m/min.
Film stretchability energy parameter such as the following table 4 that embodiment 4 obtains
Table 4
It is tested by release and isolation, vacuum bag film can be easily detached from from product upper and lower surface very much, and nothing
Resin overflows.
Laying is carried out by layer paving technique, vacuumizing ensures that vacuum degree not less than 0.095MPa, closes vaccum-pumping equipment,
Gas leakage detection is carried out after 10min, vacuum degree, which reduces, is no more than 0.015MPa；6H is kept the temperature at 120 DEG C, after cooling, vacuum degree is
0.086MPa
By the above various embodiments and performance test results, it can be seen that, the present invention is not only able to satisfy the gas of vacuum bag film itself
The requirement of close property, also with the isolation features of isolation film, resin can be isolated, and have good release effect and excellent
Mechanical property.
Release performance and isolation performance test method are as follows:
Using vacuum forming technique, steps are as follows:
1. preparing mold: it is polished die surface with sand paper, until the smooth no harsh feeling in surface, after acetone wiped clean,
Band glue release cloth is sticked, stamps sealing joint strip in mold surrounding；
2. carrying out laying by such as the following table 5 sequence
Table 5
| Ply stacking-sequence | Laminated material |
| 1 | 1 layer of vacuum bag film |
| 2 | 5 layers of low temperature curing prepreg |
| 3 | 1 layer of vacuum bag |
After 3 dozens of complete vacuum bags, 110 DEG C~120 DEG C solidifications are carried out to it
4 after curing completelies open vacuum bag, observe the release situation of product upper and lower surface and vacuum bag film, Yi Jizhen
Whether there is or not resin spillings for empty bag film surface.
By test result, the release performance of the vacuum bag film upper and lower surface and prepreg is excellent, can be well
It is detached from from article surface, and surface is overflowed without resin, isolation effect is good.
Airtightness testing method is as follows:
Laying is carried out according to above-mentioned release performance and isolation performance test method, beating bag vacuum ensures vacuum degree not
Less than 0.095MPa, vaccum-pumping equipment is closed, gas leakage detection is carried out after 10min, vacuum degree, which reduces, is no more than 0.015MPa；120
6H is kept the temperature at DEG C, after cooling, vacuum degree is observed, if vacuum degree in 0.08MPa or more, illustrates that the air-tightness of vacuum bag is good
It is good.
By test result, the air-tightness of the vacuum bag is good.
Comparative example 1
The interlayer of multilayer material designs are as follows: five-layer co-squeezing PA/Tie/PE/Tie/PA
PE:35 parts
PA:60 parts
Tie:4 parts
Color masterbatch: 0.3 part
Other auxiliary agents: 0.7 part
PE layers HDPE:20 parts of ratio, LDPE:80 parts
Step: matching out raw material according to above-mentioned component weight ratio, and raw material is packed into helical plastic extruder by interlayer structure
Hopper in, by helical plastic extruder plastifying fusion, helical plastic extruder barrel internal pressure and its screw rod to
Under preceding thrust, the raw material of melt shape is transported to five-layer co-squeezing and goes out at the die head of inflation film manufacturing machine, after die head is compound and
Tubular vacuum bag film is blown at mouth mold.The PE layer extruder temperature of screw rod plastic extruder is 210 DEG C, revolving speed 41rpm；Tie
Layer bar temperature is 210 DEG C, revolving speed 15rpm；PA layers of extruder temperature are 250 DEG C, revolving speed 38rpm；The temperature 250 of the inflation film manufacturing machine
DEG C, blow-up ratio 1.5,75 μm of film thickness, draw off rate 35m/min.
Film stretchability energy parameter such as the following table 6 that comparative example 1 obtains
Table 6
It is tested by release and isolation, vacuum bag film is relatively difficult from the disengaging of product upper and lower surface, but without resin
It overflows.
Laying is carried out by layer paving technique, vacuumizing ensures that vacuum degree not less than 0.095MPa, closes vaccum-pumping equipment,
Gas leakage detection is carried out after 10min, vacuum degree, which reduces, is no more than 0.015MPa；6H is kept the temperature at 120 DEG C, after cooling, vacuum degree is
0.090MPa
Comparative example 2
The interlayer of multilayer material designs are as follows: five-layer co-squeezing PE/Tie/PA/Tie/PE
PE:72 parts
PA:25 parts
Tie:2.5 parts
Color masterbatch: 0.2 part
Other auxiliary agents: 0.3 part
PE layers HDPE:30 parts of ratio, LDPE:70 parts
Step: matching out raw material according to above-mentioned component weight ratio, and raw material is packed into helical plastic extruder by interlayer structure
Hopper in, by helical plastic extruder plastifying fusion, helical plastic extruder barrel internal pressure and its screw rod to
Under preceding thrust, the raw material of melt shape is transported to five-layer co-squeezing and goes out at the die head of inflation film manufacturing machine, after die head is compound and
Tubular vacuum bag film is blown at mouth mold.The PE layer extruder temperature of screw rod plastic extruder is 210 DEG C, revolving speed 45rpm；Tie
Layer bar temperature is 210 DEG C, revolving speed 15rpm；PA layers of extruder temperature are 250 DEG C, revolving speed 43rpm；The temperature 250 of the inflation film manufacturing machine
DEG C, blow-up ratio 1.5,75 μm of film thickness, draw off rate 35m/min.
Film stretchability energy parameter such as the following table 7 that comparative example 2 obtains
Table 7
It is tested by release and isolation, vacuum bag film can be easily detached from from product upper and lower surface very much, and nothing
Resin overflows.
Laying is carried out by layer paving technique, vacuumizing ensures that vacuum degree not less than 0.095MPa, closes vaccum-pumping equipment,
Gas leakage detection is carried out after 10min, vacuum degree, which reduces, is no more than 0.015MPa；6H is kept the temperature at 120 DEG C, after cooling, vacuum degree is
0.080MPa
Comparative example 3
The interlayer of multilayer material designs are as follows: five-layer co-squeezing PE/Tie/PA/Tie/PE
PE:55 parts
PA:41 parts
Tie:3 parts
Color masterbatch: 0.3 part
Other auxiliary agents: 0.7 part
PE layers HDPE:10 parts of ratio, LDPE:90 parts
Step: matching out raw material according to above-mentioned component weight ratio, and raw material is packed into helical plastic extruder by interlayer structure
Hopper in, by helical plastic extruder plastifying fusion, helical plastic extruder barrel internal pressure and its screw rod to
Under preceding thrust, the raw material of melt shape is transported to five-layer co-squeezing and goes out at the die head of inflation film manufacturing machine, after die head is compound and
Tubular vacuum bag film is blown at mouth mold.The PE layer extruder temperature of screw rod plastic extruder is 210 DEG C, revolving speed 42rpm；Tie
Layer bar temperature is 210 DEG C, revolving speed 15rpm；PA layers of extruder temperature are 250 DEG C, revolving speed 35rpm；The temperature 250 of the inflation film manufacturing machine
DEG C, blow-up ratio 1.5,80 μm of film thickness, draw off rate 30m/min.
Film stretchability energy parameter such as the following table 8 that comparative example 3 obtains
Table 8
It is tested by release and isolation, vacuum bag film is detached from difficulty from product upper and lower surface, and surface is overflow without resin
Out.
Laying is carried out by layer paving technique, vacuumizing ensures that vacuum degree not less than 0.095MPa, closes vaccum-pumping equipment,
Gas leakage detection is carried out after 10min, vacuum degree, which reduces, is no more than 0.015MPa；6H is kept the temperature at 120 DEG C, after cooling, vacuum degree is
0.085MPa
Comparative example 4
The interlayer of multilayer material designs are as follows: five-layer co-squeezing PE/Tie/PA/Tie/PE
PE:60 parts
PA:35 parts
Tie:4 parts
Color masterbatch: 0.5 part
Other auxiliary agents: 0.5 part
PE layers HDPE:25 parts of ratio, LDPE:75 parts
Step: matching out raw material according to above-mentioned component weight ratio, and raw material is packed into helical plastic extruder by interlayer structure
Hopper in, by helical plastic extruder plastifying fusion, helical plastic extruder barrel internal pressure and its screw rod to
Under preceding thrust, the raw material of melt shape is transported to five-layer co-squeezing and goes out at the die head of inflation film manufacturing machine, after die head is compound and
Tubular vacuum bag film is blown at mouth mold.The PE layer extruder temperature of screw rod plastic extruder is 210 DEG C, revolving speed 65rpm；Tie
Layer bar temperature is 210 DEG C, revolving speed 20rpm；PA layers of extruder temperature are 250 DEG C, revolving speed 25rpm；The temperature 250 of the inflation film manufacturing machine
DEG C, blow-up ratio 1.3,70 μm of film thickness, draw off rate 40m/min.
Film stretchability energy parameter such as the following table 9 that comparative example 4 obtains
Table 9
It is tested by release and isolation, vacuum bag film can be more easily detached from from product upper and lower surface, and surface
No resin overflows.
Laying is carried out by layer paving technique, vacuumizing ensures that vacuum degree not less than 0.095MPa, closes vaccum-pumping equipment,
Gas leakage detection is carried out after 10min, vacuum degree, which reduces, is no more than 0.015MPa；6H is kept the temperature at 120 DEG C, after cooling, vacuum degree is
0.068MPa
Comparative example 5
The interlayer of multilayer material designs are as follows: five-layer co-squeezing PE/Tie/PA/Tie/PE
PE:50 parts
PA:45 parts
Tie:3 parts
Color masterbatch: 0.3 part
Other auxiliary agents: 1.7 parts
PE layers HDPE:35 parts of ratio, LDPE:65 parts
Step: matching out raw material according to above-mentioned component weight ratio, and raw material is packed into helical plastic extruder by interlayer structure
Hopper in, by helical plastic extruder plastifying fusion, helical plastic extruder barrel internal pressure and its screw rod to
Under preceding thrust, the raw material of melt shape is transported to five-layer co-squeezing and goes out at the die head of inflation film manufacturing machine, after die head is compound and
Tubular vacuum bag film is blown at mouth mold.The PE layer extruder temperature of screw rod plastic extruder is 245 DEG C, revolving speed 45rpm；Tie
Layer bar temperature is 220 DEG C, revolving speed 15rpm；PA layers of extruder temperature are 260 DEG C, revolving speed 50rpm；The temperature 260 of the inflation film manufacturing machine
DEG C, blow-up ratio 1.6,65 μm of film thickness, draw off rate 40m/min.
Film stretchability energy parameter such as the following table 10 that comparative example 5 obtains
Table 10
It is tested by release and isolation, vacuum bag film can be more easily detached from from product upper and lower surface, and surface
No resin overflows.
Laying is carried out by layer paving technique, vacuumizing ensures that vacuum degree not less than 0.095MPa, closes vaccum-pumping equipment,
Gas leakage detection is carried out after 10min, vacuum degree, which reduces, is no more than 0.015MPa；6H is kept the temperature at 120 DEG C, after cooling, vacuum degree is
0.072MPa 。
Claims (9)
1. a kind of vacuum bag film with two-sided release function, which is characterized in that by using multilayer material after PE, Tie, PA mixing
Material coextrusion blow forms, the interlayer design of the multilayer material are as follows: five-layer co-squeezing PE/Tie/PA/Tie/PE, wherein described
PA is the copolymer of PA6 and PA66, and the PE layer material is the mixture of LDPE and HDPE.
2. a kind of vacuum bag film with two-sided release function as described in claim 1, which is characterized in that by following weight
It is formed after the raw material mixing divided using multilayer material coextrusion blow, comprising:
PE:40~65 part；
PA:30~55 part；
Tie:2~4 part；
Color masterbatch: 0.1~2 part；
Other auxiliary agents: 0.1~2 part；
The PA is the copolymer of PA6 and PA66；
The PE layer material is the mixture of LDPE and HDPE, mixed proportion are as follows:
HDPE:15~40 part；
LDPE:60~85 part；
The interlayer of the multilayer material designs are as follows: five-layer co-squeezing PE/Tie/PA/Tie/PE.
3. a kind of vacuum bag film with two-sided release function as claimed in claim 2 or claim 3, which is characterized in that it is described its
His auxiliary agent includes: that slipping agent, antioxidant, heat stabilizer, any one or more in antistatic agent can improve film and add
The auxiliary agent of work processability and film comprehensive performance.
4. a kind of vacuum bag film with two-sided release function as claimed in claim 2 or claim 3, which is characterized in that the tool
There is the vacuum bag film of two-sided release function to be blow molded by the raw material mixing of following parts by weight:
PE:57 parts；
PA:39 parts；
Tie:3 parts；
Color masterbatch: 0.3 part；
Other auxiliary agents: 0.7 part；
Wherein, it is 1:3 that PE layers of the ratio, which is HDPE:LDPE,.
5. a kind of preparation side of vacuum bag film with two-sided release function as described in any one of working as claim 1-4
Method, which comprises the following steps:
Raw material is matched out first, in accordance with above-mentioned component weight ratio, raw material is packed into the hopper of helical plastic extruder by interlayer structure
In；
Be then passed through helical plastic extruder plastifying fusion, helical plastic extruder barrel internal pressure and its screw rod forward
Thrust under, the raw material of melt shape is transported to five-layer co-squeezing and goes out at the die head of inflation film manufacturing machine, after die head is compound and mouth
Tubular vacuum bag film is blown at mould.
6. a kind of preparation method of the vacuum bag film with two-sided release function as claimed in claim 5, which is characterized in that
The PE layer extruder temperature of the screw rod plastic extruder is 200 DEG C~240 DEG C, 35~55rpm of revolving speed.
7. a kind of preparation method of the vacuum bag film with two-sided release function as claimed in claim 5, which is characterized in that
The Tie layer bar temperature of the screw rod plastic extruder is 200 DEG C~240 DEG C, 15~35rpm of revolving speed.
8. a kind of preparation method of the vacuum bag film with two-sided release function as claimed in claim 5, which is characterized in that
The PA layer extruder temperature of the screw rod plastic extruder is 220 DEG C~255 DEG C, 30~60rpm of revolving speed.
9. a kind of preparation method of the vacuum bag film with two-sided release function as claimed in claim 5, which is characterized in that
235 DEG C~255 DEG C of the temperature of the inflation film manufacturing machine of the screw rod plastic extruder, blow-up ratio 1.3~2.0, film thickness 50~
100 μm, 10~40m/min of draw off rate.
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| CN112356417A (en) * | 2020-12-05 | 2021-02-12 | 宏祥新材料股份有限公司 | Production process of five-layer co-extrusion blow molding polyethylene geomembrane |
| CN113512288A (en) * | 2021-04-28 | 2021-10-19 | 上海沥高科技股份有限公司 | High-temperature-resistant vacuum bag film and preparation method and application thereof |
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