CN105802157B - A kind of high temperature mould release membrance and its production technology - Google Patents
A kind of high temperature mould release membrance and its production technology Download PDFInfo
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- CN105802157B CN105802157B CN201610317172.0A CN201610317172A CN105802157B CN 105802157 B CN105802157 B CN 105802157B CN 201610317172 A CN201610317172 A CN 201610317172A CN 105802157 B CN105802157 B CN 105802157B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- 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
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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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
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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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
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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
- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2477/06—Polyamides derived from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of high temperature mould release membrance and its production technology, high temperature mould release membrance is combined by two layers of outer membrane and one layer of interlayer film, and outer membrane includes upper and lower two layers, and interlayer film is arranged between upper and lower two layers of outer membrane；The mass fraction of each component is as follows in outer membrane：PBT polybutylene terephthalate (PBT)s 68~72%, PA66 polyamides 23~27%, compatilizer 5%；The mass fraction of each component is as follows in interlayer film：PBT polybutylene terephthalate (PBT)s 78~82%, LDPE low density polyethylene (LDPE)s 18~22%；The thickness of upper and lower two layers of outer membrane is respectively the 30% of mould release membrance gross thickness in high temperature mould release membrance, and the thickness of interlayer film is the 40% of mould release membrance gross thickness；The mould release membrance of the present invention is by the way that the control of component reasonable distribution and technique has the characteristics that high temperature resistant, release effect is good, bonding processes are pollution-free, it is effectively improved the qualification rate of FPC flexible PCBs and reduces cost, while meeting the clean manufacturing demand of FPC flexible PCBs, application prospect is wide.
Description
Technical field
The present invention relates to the auxiliary equipment field of flexible PCB production, more particularly to a kind of flexible PCB that is applied to give birth to
The high temperature mould release membrance and its production technology of production.
Background technology
FPC is also known as " FPC flexible boards ", is the printed circuit made of flexible insulating substrate, has many hard
The advantages of property printed circuit board (PCB) does not possess., can be any according to space layout requirement such as it can be with free bend, winding, folding
Arrange, and arbitrarily moved and flexible in three dimensions, so as to reach the integration that components and parts assembling connects with wire.Utilize FPC
Flexible board can be substantially reduced the volume of electronic product, be applicable the need that electronic product develops to high density, miniaturization, highly reliable direction
Will；Therefore, FPC flexible boards are in fields such as space flight, military affairs, mobile communication, laptop computer, computer peripheral equipment, PDA, digital cameras
Or it is widely used on product.
In FPC flexible PCBs in stitching operation, the mould release membrance used determines the quality of lamination, and being laminated is also
The most important processing procedure of FPC plates factory；Therefore choosing for mould release membrance is very crucial, mould release membrance used wants high temperature resistant to cut difficult deformation, smooth
Spend, release effect is good.
In order to realize function above, presently relevant mould release membrance product not exclusively possesses function above, common practices be
The very thin silica gel mould release of one layer of the surface even spread of mould release membrance, silicone oil precipitation can be produced in use, pollutes circuit board；And
External Related product carries out technology blockage and expensive again.
The content of the invention
For above-mentioned problem, present invention aims at provide a kind of high temperature resistant, release effect be good, bonding processes without
The high temperature mould release membrance and its production technology that are applied to flexible PCB production of pollution.
In order to achieve the above object, the technical solution adopted by the present invention is as follows：A kind of high temperature mould release membrance, described high temperature from
Type film is combined by two layers of outer membrane and one layer of interlayer film, and described outer membrane includes upper and lower two layers, and interlayer film is arranged on
Between upper and lower two layers of outer membrane.
The mass fraction of each component is as follows in outer membrane of the present invention：PBT polybutylene terephthalate (PBT)s 68~
72%th, PA66 polyamides 23~27%, compatilizer 5%.
The PBT polybutylene terephthalate (PBT)s of the present invention are the condensation polymers of terephthalic acid (TPA) and 1,4- butanediols；It is
Those semi-crystalline materials, there are extraordinary chemical stability, mechanical strength, electrical insulation characteristics and heat endurance；Because PBT is in molten condition
Lower good fluidity, viscosity is low, and " curtain coating " phenomenon easily occurs；Therefore from PBT as base material in technical scheme.PBT has
There is high-fire resistance, its fusion temperature is 225~275 DEG C；If one is improved by modification, its tensile strength, bending strength to PBT
More than times, heat distortion temperature greatly improves；Can the long-term work at 140 DEG C.
The PA66 polyamides of the present invention are the total of the high polymer containing amide group in macromolecular main chain repeat unit
Claim；PA66 has higher fusing point in polyamide material, and it is a kind of semi-crystal-crystalline material, can also be kept in higher temperature
Stronger strength and stiffness, it is heat-resist, can the long-term phase use at 150 DEG C.
The mass fraction of each component is as follows in interlayer film of the present invention：PBT polybutylene terephthalate (PBT)s 78
~82%, LDPE low density polyethylene (LDPE)s 18~22%.
LDPE low density polyethylene (LDPE)s in the present invention are using ethene as monomer, under 98. 0~294MPa high pressure, are used
Oxygen or organic peroxide are initiator, the polymer of aggregated gained；It is the waxy solid that a kind of milky is translucent
Resin, nontoxic, softening point is relatively low；Being melted more than softening point, its heat sealability, moulding processability are fine, and flexibility is good,
Toughness, lower temperature resistance are fine.
The thickness of upper and lower two layers of outer membrane is respectively the 30% of mould release membrance gross thickness in high temperature mould release membrance of the present invention, in
Between tunic thickness be mould release membrance gross thickness 40%.
Compatilizer of the present invention is AX8900 resins, and described AX8900 resins are ethene, methyl acrylate, methyl
The terpolymer of glycidyl acrylate three；The AX8900 resins of the present invention are manufactured using high-pressure free radical polymerization technique
Form, it is mainly used in PBT, PET, PC, PA and PBT/PC, PET/PC, is used as toughness reinforcing compatilizer；PET can be rushed
Property modification is hit, to PA66 toughening modifyings.
The production technology of high temperature mould release membrance of the present invention, described production technology include following operating procedure：
1）Being put into according to its mass ratio in high-speed mixer for each component in outer membrane is mixed 3 times, incorporation time is
3min/ times, melt blending is carried out using double screw extruder, temperature control screw speed 280r/min, passes through at 270 DEG C
Shearing, mixing, the tie rod pelletizing of screw rod, it is standby after outer membrane granule is dried 3 hours in dryer with 140 DEG C；
2）Being put into according to its mass ratio in high-speed mixer for each component in interlayer film is mixed 3 times, incorporation time
For 3min/ times, it is sealed rear standby；
3）Produced using the combination of three extruders and casting machine, wherein extruder A and extruder C are outer for conveying
Film, extruder B are used to convey interlayer film, and the product of three extruders extrusions has by high temperature T-shaped mould to carry out compound outside film, connects
And three-layer co-extruded shaping, cooling and stretching are carried out in casting machine, finally by adjusting bolt rotating speed and tension adjustment, draw thickness
Spend the product for 60~90 μm.
Operation is in detail for it：Extruder A and C screw rod are first opened, die cavity is rinsed, after die orifice film surface is complete
Extruder B screw rod is opened, after die orifice film surface is smooth, follow-up each driving drum is opened, carries out wearing film according to Fig. 2；At this moment
The temperature control of rubber roll 5 is at 30 DEG C, and the temperature control of format roll 6 is at 50 DEG C, and chill roll 7,8 temperature controls are at 150 DEG C；During should see
Calibrator curve is examined, by adjusting bolt rotating speed and tension adjustment, draws the product that thickness is 60~90 μm；Film surface flatness can
Leveling is carried out by die orifice adjustment bolt.
Raw materials for production PBT in outer membrane and interlayer film of the present invention, using preceding needing drying process, 110~
2.5~3.5h is dried at a temperature of 120 DEG C, raw material PBT humidity ＜ 0.03% after drying.
Raw materials for production PA66 in outer membrane of the present invention, it is using preceding needing drying process, it is empty in 85 DEG C of heat
4~6h of drying process in gas.
Step 3 of the present invention）Production process in extruder A and extrusion C screw rod heating-up temperature be 260~270
DEG C, the temperature that device is collaborated on casting machine is 245~255 DEG C, and the temperature of T-shaped mould tool is 235~240 DEG C.
The advantage of the invention is that：The mould release membrance of the present invention stresses release mainly for partially flexible circuit board pressing process
Effect process uses；PBT is most tough and tensile thermoplastic wherein in outer membrane, the easy casting film-forming of its good fluidity, its temperature tolerance,
High mechanical strength, by the modification of polyamide, it is a little more prominent；It is excellent strong at high temperature and PA66 fusing points are high
Degree and rigidity, avoid bonding processes Nian Jie with other materials, the addition of fibre resin, its performance further improves, and increases it
Stability；By compatilizer PBT, PA66 can be made more preferably to merge；LDPE flexibility is mainly utilized in internal layer, ensures film
Pliability, and adhesion is carried out by PBT molecules contained by internal layer and outer membrane PBT molecules, ideally forms monofilm.
The present invention mould release membrance by the control of component reasonable distribution and technique have high temperature resistant, release effect it is good, pressing
The features such as process is pollution-free, it is effectively improved the qualification rate of FPC flexible PCBs and reduces cost, while meets FPC flexibilities
The clean manufacturing demand of circuit board, extensive market.
Brief description of the drawings
Fig. 1 is the structure schematic diagram of the mould release membrance of the present invention；
Fig. 2 is the device connection figure in the production technology of the present invention.
Wherein, a upper stratas outer membrane, b interlayer films, c lower floors outer membrane, 1 extruder A screw rods, 2 extruder B spirals
Bar, 3 extruder C screw rods, 4 T-shaped moulds tool, 5 rubber rolls, 6 format rolls, 7 chill roll A, 8 chill roll B, 9 calibrators,
10 tensioners, 11 reels.
Embodiment
The present invention is described in further detail with embodiment for explanation below in conjunction with the accompanying drawings.
Unless otherwise instructed, the raw materials for production mentioned in following examples of the invention and plant equipment are on the market
Commercially available convenient source and plant equipment.
Embodiment 1：A kind of high temperature mould release membrance as shown in Figure 1, the mass fraction of each component is as follows in its outer membrane：PBT gathers
Mutual-phenenyl two acid bromide two alcohol ester 68%, PA66 polyamides 27%, AX8900 resins 5%；The matter of each component in in-between tunic
It is as follows to measure fraction：PBT polybutylene terephthalate (PBT)s 78%, LDPE low density polyethylene (LDPE)s 22%；In described high temperature mould release membrance
The thickness of upper and lower two layers of outer membrane is respectively the 30% of mould release membrance gross thickness, and the thickness of interlayer film is the 40% of mould release membrance gross thickness.
Embodiment 2：A kind of high temperature mould release membrance as shown in Figure 1, the mass fraction of each component is as follows in its outer membrane：PBT gathers
Mutual-phenenyl two acid bromide two alcohol ester 72%, PA66 polyamides 23%, AX8900 resins 5%；The matter of each component in in-between tunic
It is as follows to measure fraction：PBT polybutylene terephthalate (PBT)s 82%, LDPE low density polyethylene (LDPE)s 18%；In described high temperature mould release membrance
The thickness of upper and lower two layers of outer membrane is respectively the 30% of mould release membrance gross thickness, and the thickness of interlayer film is the 40% of mould release membrance gross thickness.
Embodiment 3：A kind of high temperature mould release membrance as shown in Figure 1, the mass fraction of each component is as follows in its outer membrane：PBT gathers
Mutual-phenenyl two acid bromide two alcohol ester 70%, PA66 polyamides 25%, AX8900 resins 5%；The matter of each component in in-between tunic
It is as follows to measure fraction：PBT polybutylene terephthalate (PBT)s 80%, LDPE low density polyethylene (LDPE)s 20%；In described high temperature mould release membrance
The thickness of upper and lower two layers of outer membrane is respectively the 30% of mould release membrance gross thickness, and the thickness of interlayer film is the 40% of mould release membrance gross thickness.
Embodiment 4：As illustrated in fig. 1 and 2, a kind of production technology of high temperature mould release membrance, described production technology include as follows
Operating procedure：
1）By the raw materials for production PBT in outer membrane of the present invention and interlayer film, using drying process is preceding needed, 110~120
2.5~3.5h is dried at a temperature of DEG C, raw material PBT humidity ＜ 0.03% after drying.
2）By the raw materials for production PA66 in outer membrane, using drying process is preceding needed, it is dried in 85 DEG C of hot-air
Handle 4~6h.
3）Being put into according to its mass ratio in high-speed mixer for each component in outer membrane is mixed 3 times, incorporation time is
3min/ times, melt blending is carried out using double screw extruder, temperature control screw speed 280r/min, passes through at 270 DEG C
Shearing, mixing, the tie rod pelletizing of screw rod, it is standby after outer membrane granule is dried 3 hours in dryer with 140 DEG C；
4）Being put into according to its mass ratio in high-speed mixer for each component in interlayer film is mixed 3 times, incorporation time
For 3min/ times, it is sealed rear standby.
5）Produced using the combination of three extruders and casting machine, wherein extruder A and extruder C are outer for conveying
Film, extruder B are used to convey interlayer film, and the product of three extruders extrusions has by high temperature T-shaped mould to carry out compound outside film, connects
And three-layer co-extruded shaping, cooling and stretching are carried out in casting machine, finally by adjusting bolt rotating speed and tension adjustment, draw thickness
Spend the product for 60~90 μm；Wherein extruder A and extrusion C screw rod heating-up temperature are 260~270 DEG C, are collaborated on casting machine
The temperature of device is 245~255 DEG C, and the temperature of T-shaped mould tool is 235~240 DEG C.
Using above-mentioned formula and method, the performance parameter of the high temperature mould release membrance finally given is as shown in the table：
。
Embodiment 5：It is formulated contrast test；In the case where process conditions and formula dosage are constant, to the formula of the present invention
In in each component carry out contrast test, obtained result is as shown in the table：
As seen from the above table：Middle PBT content makes a difference to the heat resistance of product in the outer membrane of the present invention and intermediate layer,
When its content is excessive or less, the final temperature tolerance of product declines, and the interlayer film thickness in product with it is release
The ratio of film gross thickness, the off-type force of final products is influenceed, when its thickness proportion changes, the final off-type force meeting of product
To a certain extent, and other combination properties of product can change.
Embodiment 6：Method contrast test；It is formulated in using embodiment 3, the constant situation of other process conditions variables
Under, contrast test is carried out to the parameter in the production technology of the present invention, obtained result is as shown in the table：
As seen from the above table：Whether raw material carries out drying and processing influences very on the flow casting moldings of final products, presentation quality
Greatly；The melting that the temperature of interflow device influences plastics plays a role, and causes the modeling fusing point of final products to change.
It should be noted that above-mentioned is only presently preferred embodiments of the present invention, not it is used for limiting the protection model of the present invention
Enclose, any combination or equivalents made on the basis of above-described embodiment belong to protection scope of the present invention.
Claims (6)
1. a kind of high temperature mould release membrance, it is characterised in that described high temperature mould release membrance is combined by two layers of outer membrane and one layer of interlayer film
Form, described outer membrane includes upper and lower two layers, and interlayer film is arranged between upper and lower two layers of outer membrane；
The mass fraction of each component is as follows in described outer membrane：PBT polybutylene terephthalate (PBT)s 68~72%, PA66 polyamides
Polyimide resin 23~27%, compatilizer 5%；
The mass fraction of each component is as follows in described interlayer film：PBT polybutylene terephthalate (PBT)s 78~82%, LDPE
Low density polyethylene (LDPE) 18~22%；
The thickness of upper and lower two layers of outer membrane is respectively the 30% of mould release membrance gross thickness in described high temperature mould release membrance, the thickness of interlayer film
Spend for the 40% of mould release membrance gross thickness.
2. high temperature mould release membrance according to claim 1, it is characterised in that described compatilizer is AX8900 resins, described
AX8900 resins for ethene, methyl acrylate, the terpolymer of GMA three.
3. a kind of production technology of high temperature mould release membrance as claimed in claim 1, it is characterised in that described production technology includes
Following operating procedure：
1）Being put into according to its mass ratio in high-speed mixer for each component in outer membrane is mixed 3 times, incorporation time 3min/
It is secondary, melt blending is carried out using double screw extruder, temperature control screw speed 280r/min, passes through screw rod at 270 DEG C
Shearing, it is kneaded, tie rod pelletizing, it is standby after outer membrane granule is dried 3 hours in dryer with 140 DEG C；
2）Being put into according to its mass ratio in high-speed mixer for each component in interlayer film is mixed 3 times, incorporation time is
3min/ times, it is sealed rear standby；
3）Being produced using the combination of three extruders and casting machine, wherein extruder A and extruder C are used to convey outer membrane,
Extruder B is used to convey interlayer film, and the product of three extruder extrusions is by compound outside high temperature T-shaped mould tool progress film, then
Three-layer co-extruded shaping, cooling and stretching are carried out in casting machine, finally by adjusting bolt rotating speed and tension adjustment, draws thickness
For 60~90 μm of product.
4. the production technology of high temperature mould release membrance according to claim 3, it is characterised in that described outer membrane and interlayer film
In raw materials for production PBT, using preceding needing drying process, 2.5~3.5h is dried at a temperature of 110~120 DEG C, it is former after drying
Expect PBT humidity ＜ 0.03%.
5. the production technology of high temperature mould release membrance according to claim 3, it is characterised in that the production in described outer membrane is former
Expect PA66, using drying process is preceding needed, by it in 85 DEG C of hot-air 4~6h of drying process.
6. the production technology of high temperature mould release membrance according to claim 3, it is characterised in that the step 3）Production process
Middle extruder A and extrusion C screw rod heating-up temperature are 260~270 DEG C, and the temperature that device is collaborated on casting machine is 245~255 DEG C, T
The temperature of pattern tool is 235~240 DEG C.
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| CN106273959A (en) * | 2016-08-11 | 2017-01-04 | 厦门新旺新材料科技有限公司 | Three layers of resistance glue mould release membrance |
| CN109760377B (en) * | 2018-11-22 | 2021-03-19 | 江苏大学 | High-release-property silicon-free composite release film and preparation method thereof |
| CN111993708B (en) * | 2019-05-27 | 2023-12-05 | 宁波长阳科技股份有限公司 | Release film and preparation method thereof |
| CN115011277B (en) * | 2022-08-09 | 2022-11-15 | 宁波长阳科技股份有限公司 | PBT release film and preparation method and application thereof |
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| JPH0733048B2 (en) * | 1987-04-08 | 1995-04-12 | ポリプラスチックス株式会社 | Method for producing polybutylene terephthalate resin film |
| CN103144391B (en) * | 2013-03-15 | 2015-04-29 | 厦门新旺新材料科技有限公司 | Composite polyester and nylon release film |
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