CN113416503A - Online coating low-peeling-force polyester release film and preparation method thereof - Google Patents
Online coating low-peeling-force polyester release film and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/401—Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
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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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
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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
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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
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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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
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
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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
- C08J2469/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention relates to an online coating low-peeling-force polyester release film, which comprises a polyester base film and a release coating coated on the surface of one side of the polyester base film, wherein the polyester base film is composed of film-grade polyester resin, fluorine-containing polyester resin and antistatic polyester resin, and the weight percentages of the components are as follows: 80-90% of film-grade polyester resin, 5-10% of fluorine-containing polyester resin and 5-10% of antistatic polyester resin; the polyester basal membrane is of a single-layer structure and is prepared by melt extrusion and biaxial stretching, and the thickness of the polyester basal membrane is 20-60 microns. The release coating is formed by coating release coating liquid and baking and curing, and the thickness of the release coating is 1-5 microns. The on-line coating low-peeling-force polyester release film provided by the invention is prepared by release coating liquid and base film preparation, single-layer extrusion, coating curing and other processes, has the characteristics of low peeling force, stable release force, heat resistance, antifouling property and the like, and can meet the use requirements of packaging labels such as self-adhesive labels, electronic labels, bar codes and the like in the industries of electronics, medicine, daily chemicals, food and the like.
Description
Technical Field
The invention relates to the field of release films, in particular to an online coating low-peeling-force polyester release film and a preparation method thereof.
Background
The release film is also called a release film, an anti-sticking film, a release film, a separator, a separation film, or the like, and means a film having a surface with separability. The release film has the advantages of higher hydrophobicity, lower peeling force, better residual adhesion rate and the like, and has no stickiness or slight stickiness after being contacted with a specific material. At present, the release film is widely used for packaging and labeling adhesive labels, electronic supervision codes, bar codes and the like in the industries of food, medicine, electronics, daily chemicals, toys and the like. The silicon-coated release film used as a matched high-speed labeling machine requires low peeling force, stable peeling force and small fluctuation, and can meet the harsh requirements of high-speed production of labeling machines.
At present, polyester release films on domestic markets are mainly produced by two modes of off-line coating and on-line coating. The release film produced by an off-line coating mode usually needs plasma or corona treatment on the surface of the film, has the problems of high production cost, generally lower product residual adhesion rate than 87 percent and easy separation of organic silicon coating materials, and can be solved by on-line coating. Compared with off-line coating, the release film produced by on-line coating has low production cost, the residual adhesion rate is up to more than 95%, the problem of organic silicon coating separation cannot occur, but the release film has the problems of high stripping force, and crystal points, specks and lines are easy to appear on the film surface after stripping, so that the requirement of a labeling machine for high-speed labeling is difficult to meet.
Disclosure of Invention
The invention aims to provide an on-line coating low-peeling-force polyester release film and a preparation method thereof, which effectively solve the problems in the background technology and meet the use requirement of a labeling machine for high-speed labeling.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an on-line coated low-peeling-force polyester release film comprises a polyester base film and a release coating coated on one side surface of the polyester base film.
The polyester-based film is composed of film-grade polyester resin, fluorine-containing polyester resin and antistatic polyester resin, and the weight percentages of the components are as follows: 80-90% of film-grade polyester resin, 5-10% of fluorine-containing polyester resin and 5-10% of antistatic polyester resin.
The polyester basal membrane is of a single-layer structure and is prepared by melt extrusion and biaxial stretching, and the thickness of the polyester basal membrane is 20-60 microns.
The release coating is formed by coating release coating liquid and baking and curing, and the thickness of the release coating is 1-5 microns.
The release coating liquid is prepared from a main agent, an auxiliary agent and a solvent, wherein the main agent is matrix resin, methyl dichlorosilane and a fluorine-containing polymer, and the weight percentage of the main agent is about 20-40% of that of the release coating liquid; the auxiliary agent is isophorone diamine, 2, 6-di-tert-butyl-4-methylphenol, hydroxyethyl methacrylate, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, barium stearate, nano silicon dioxide, alkyl sodium sulfonate, octamethylcyclotetrasiloxane and a low-stripping force regulator, and the weight percentage of the auxiliary agent is about 10% -20% of that of the release coating liquid; the solvent is cyclohexanone, and the weight percentage of the solvent is about 40-70% of the release coating liquid.
Preferably, the polyester in the present invention is at least one of a polyethylene terephthalate resin, a polyethylene naphthalate resin, a poly (1.3-propylene terephthalate) resin, a polybutylene terephthalate resin, a polyarylate resin, or a copolyester resin.
Preferably, the matrix resin in the invention is any one or a mixture of more of polycarbonate diol, polycaprolactone polyol or polyester polyol.
Preferably, the fluorine-containing polymer in the invention is any one or a mixture of more of polychlorotrifluoroethylene, polyhexafluoropropylene, polytetrafluoroethylene, polyvinylidene fluoride, perfluoroalkoxy resin, ethylene-tetrafluoroethylene copolymer and ethylene-chlorotrifluoroethylene copolymer.
Preferably, the low-peeling-force regulator in the invention is any one or a mixture of more than one of 4-ethoxy-1, 1, 1-trifluoro-3-butene-2-ketone, 4-butoxy-1, 1, 1-trifluoro-3-butene-2-ketone and 1,1, 1-trifluoro-3-hepten-2-ketone.
The preparation method of the on-line coating low-peeling-force polyester release film comprises the following steps:
step 1) adding methyldichlorosilane, a fluorine-containing polymer and a solvent into a container, and uniformly stirring for 5-8 minutes by using a pneumatic stirrer to form a mixed solution, wherein the stirring speed is 500-; then, adding hydroxypropyl methacrylate into the container, uniformly stirring for 5-10 minutes, increasing the stirring speed to 800-; and then adding the matrix resin into a container, stirring for 5-10 minutes to obtain a mixture, and finally filtering the mixture through a filter screen to obtain a release coating liquid product.
Step 2) preparing a base film mixture: the film-grade polyester, the fluorine-containing polyester resin and the antistatic polyester resin are prepared according to the weight percentage of each component, and are sent into a drying kettle for drying, and the drying time is usually 2-4 hours, so that the base film material is obtained.
Step 3) preparing an online coating low-peeling-force polyester release film: adding the prepared base film mixture into a screw extruder, and preparing a polyester base film with a single-layer structure through melt extrusion and bidirectional stretching; and then, uniformly coating the release coating liquid on one side surface of the polyester base film by an online coating method, carrying out baking curing treatment at the drying temperature of 80-120 ℃ for 10-20 seconds, and then rolling and packaging to obtain the finished product of the low-peeling-force polyester release film.
Compared with the prior art, the invention has the beneficial effects that:
according to the on-line coating low-peel-force polyester release film provided by the invention, through optimizing the composition of the preparation raw materials and using the low-peel-force regulator, the prepared release coating liquid is low in peel force and stable in release force, and the problem of high on-line coating peel force is solved. In addition, the heat resistance, the antifouling property and the antistatic property of the polyester base film can be effectively improved by adopting the fluorine-containing polyester resin and the antistatic polyester resin which have excellent heat resistance and antifouling property; the release film prepared by adopting the release coating liquid and the polyester-based film has the characteristics of low release force, stable release force, heat resistance, stain resistance, static resistance and the like, has no trace after being peeled, does not have the problems of crystal points, specks and lines after being peeled, and can meet the use requirements of packaging labels such as self-adhesive labels, electronic labels, bar codes and the like in the industries of electronics, medicines, daily chemicals, foods and the like.
Drawings
Fig. 1 is a schematic structural diagram of an on-line coated low-peel-force polyester release film provided by the invention.
In the figure, 1-polyester base film, 2-release coating.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to explain technical contents, structural features, and objects and effects of the invention in detail.
Example 1
An online coating low-peeling-force polyester release film comprises a polyester base film 1 and a release coating 2 coated on one side surface of the polyester base film; the polyester-based film 1 is composed of film-grade polyester resin, fluorine-containing polyester resin and antistatic polyester resin, and the weight percentages of the components are as follows: 80% of film-grade polyester, 10% of fluorine-containing polyester and 10% of antistatic polyester; the polyester base film 1 is of a single-layer structure, is prepared by melt extrusion and biaxial stretching, and has a thickness of 30 micrometers.
The release coating 2 is formed by coating release coating liquid and baking and curing, and the thickness is 1 micron.
The release coating liquid is prepared from a main agent, an auxiliary agent and a solvent, wherein the main agent is matrix resin, methyl dichlorosilane and a fluorine-containing polymer, and the weight percentage of the main agent is about 20 percent of that of the release coating liquid; the auxiliary agent is isophorone diamine, 2, 6-di-tert-butyl-4-methylphenol, hydroxyethyl methacrylate, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, barium stearate, nano silicon dioxide, alkyl sodium sulfonate, octamethylcyclotetrasiloxane and a low-stripping force regulator, and the weight percentage of the auxiliary agent is about 10 percent of that of the release coating liquid; the solvent is cyclohexanone, and the weight percentage of the solvent is about 70 percent of that of the release coating liquid.
The preparation method of the low-peeling-force polyester release film comprises the following steps:
step 1) preparation of release coating liquid: adding methyl dichlorosilane, a fluorine-containing polymer and a solvent into a container, and uniformly stirring for 5 minutes by using a pneumatic stirrer to form a mixed solution, wherein the stirring speed is 500 r/min; then adding hydroxypropyl methacrylate into a container, uniformly stirring for 5 minutes, increasing the stirring speed to 800r/min, respectively adding 2, 6-di-tert-butyl-4-methylphenol, hydroxyethyl methacrylate, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, barium stearate, nano silicon dioxide, sodium alkyl sulfonate, octamethylcyclotetrasiloxane and a low-stripping-force regulator after a certain time, and uniformly stirring; and then adding the matrix resin into a container, stirring for 5 minutes to obtain a mixture, and finally filtering the mixture through a filter screen to obtain a release coating liquid product.
Step 2) preparation of base film mixture: the film-grade polyester, the fluorine-containing polyester resin and the antistatic polyester resin are prepared according to the weight percentage of each component, and are sent into a drying kettle for drying, the drying time is usually 2 hours, and the base film material is obtained.
Step 3) preparation of the low-peeling-force polyester release film: adding the prepared base film mixture into a screw extruder, and preparing a polyester base film with a single-layer structure through melt extrusion and bidirectional stretching; and then, uniformly coating the release coating liquid on one side surface of the polyester base film by an online coating method, carrying out baking curing treatment at the drying temperature of 80 ℃ for 10 seconds, and then rolling and packaging to obtain the low-peeling-force polyester release film finished product.
Example 2
An online coating low-peeling-force polyester release film comprises a polyester base film 1 and a release coating 2 coated on one side surface of the polyester base film; the polyester-based film 1 is composed of film-grade polyester resin, fluorine-containing polyester resin and antistatic polyester resin, and the weight percentages of the components are as follows: 85% of film-grade polyester, 7% of fluorine-containing polyester and 8% of antistatic polyester; the polyester base film 1 is of a single-layer structure, is prepared by melt extrusion and biaxial stretching, and has a thickness of 40 micrometers.
The release coating 2 is formed by coating release coating liquid and baking and curing, and the thickness is 3 microns.
The release coating liquid is prepared from a main agent, an auxiliary agent and a solvent, wherein the main agent is matrix resin, methyl dichlorosilane and a fluorine-containing polymer, and the weight percentage of the main agent is about 25 percent of that of the release coating liquid; the auxiliary agent is isophorone diamine, 2, 6-di-tert-butyl-4-methylphenol, hydroxyethyl methacrylate, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, barium stearate, nano silicon dioxide, alkyl sodium sulfonate, octamethylcyclotetrasiloxane and a low-stripping force regulator, and the weight percentage of the auxiliary agent is about 15 percent of that of the release coating liquid; the solvent is cyclohexanone, and the weight percentage of the solvent is about 60 percent of the release coating liquid.
The preparation method of the low-peeling-force polyester release film comprises the following steps:
step 1) preparation of release coating liquid: adding methyl dichlorosilane, a fluorine-containing polymer and a solvent into a container, and uniformly stirring for 6 minutes by using a pneumatic stirrer to form a mixed solution, wherein the stirring speed is 600 r/min; then adding hydroxypropyl methacrylate into a container, uniformly stirring for 7 minutes, increasing the stirring speed to 900r/min, respectively adding 2, 6-di-tert-butyl-4-methylphenol, hydroxyethyl methacrylate, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, barium stearate, nano silicon dioxide, sodium alkyl sulfonate, octamethylcyclotetrasiloxane and a low-stripping-force regulator after a certain time, and uniformly stirring; and then adding the matrix resin into a container, stirring for 7 minutes to obtain a mixture, and finally filtering the mixture through a filter screen to obtain a release coating liquid product.
Step 2) preparation of base film mixture: the film-grade polyester, the fluorine-containing polyester resin and the antistatic polyester resin are prepared according to the weight percentage of each component, and are sent into a drying kettle for drying, the drying time is usually 3 hours, and the base film material is obtained.
Step 3) preparation of the low-peeling-force polyester release film: adding the prepared base film mixture into a screw extruder, and preparing a polyester base film with a single-layer structure through melt extrusion and bidirectional stretching; and then, uniformly coating the release coating liquid on one side surface of the polyester base film by an online coating method, carrying out baking curing treatment at the drying temperature of 89 ℃ for 15 seconds, and then rolling and packaging to obtain the low-peeling-force polyester release film finished product.
Example 3
An online coating low-peeling-force polyester release film comprises a polyester base film 1 and a release coating 2 coated on one side surface of the polyester base film; the polyester-based film 1 is composed of film-grade polyester resin, fluorine-containing polyester resin and antistatic polyester resin, and the weight percentages of the components are as follows: 90% of film-grade polyester, 5% of fluorine-containing polyester and 5% of antistatic polyester; the polyester base film 1 is of a single-layer structure, is prepared by melt extrusion and biaxial stretching, and has a thickness of 60 micrometers.
The release coating 2 is formed by coating release coating liquid and baking and curing, and the thickness is 4 microns.
The release coating liquid is prepared from a main agent, an auxiliary agent and a solvent, wherein the main agent is matrix resin, methyl dichlorosilane and a fluorine-containing polymer, and the weight percentage of the main agent is about 40 percent of that of the release coating liquid; the auxiliary agent is isophorone diamine, 2, 6-di-tert-butyl-4-methylphenol, hydroxyethyl methacrylate, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, barium stearate, nano silicon dioxide, alkyl sodium sulfonate, octamethylcyclotetrasiloxane and a low-stripping force regulator, and the weight percentage of the auxiliary agent is about 20 percent of that of the release coating liquid; the solvent is cyclohexanone, and the weight percentage of the solvent is about 40 percent of that of the release coating liquid.
The preparation method of the low-peeling-force polyester release film comprises the following steps:
step 1) preparation of release coating liquid: adding methyl dichlorosilane, a fluorine-containing polymer and a solvent into a container, and uniformly stirring for 8 minutes by using a pneumatic stirrer to form a mixed solution, wherein the stirring speed is 800 r/min; then adding hydroxypropyl methacrylate into a container, uniformly stirring for 10 minutes, increasing the stirring speed to 1200r/min, respectively adding 2, 6-di-tert-butyl-4-methylphenol, hydroxyethyl methacrylate, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, barium stearate, nano silicon dioxide, sodium alkyl sulfonate, octamethylcyclotetrasiloxane and a low-stripping-force regulator after a certain time, and uniformly stirring; and then adding the matrix resin into a container, stirring for 10 minutes to obtain a mixture, and finally filtering the mixture through a filter screen to obtain a release coating liquid product.
Step 2) preparation of base film mixture: the film-grade polyester, the fluorine-containing polyester resin and the antistatic polyester resin are prepared according to the weight percentage of each component, and are sent into a drying kettle for drying, the drying time is usually 4 hours, and the base film material is obtained.
Step 3) preparation of the low-peeling-force polyester release film: adding the prepared base film mixture into a screw extruder, and preparing a polyester base film with a single-layer structure through melt extrusion and bidirectional stretching; and then, uniformly coating the release coating liquid on one side surface of the polyester base film by an online coating method, carrying out baking curing treatment at the drying temperature of 120 ℃ for 20 seconds, and then rolling and packaging to obtain the low-peeling-force polyester release film finished product.
The performance of the on-line coated low-peeling-force polyester release film prepared by the invention is compared with that of the conventional polyester film and is shown in the attached table 1.
Attached table 1: compared with the performance of the conventional polyester film product, the online coated low-peeling-force polyester release film has the advantages of low peeling force
From the table, the on-line coated low-peeling-force polyester release film has good elongation at break, small haze, stable tensile strength and peeling force and low heat shrinkage, and the product performance meets the preset requirements of low peeling force and residual adhesion rate of a silicon-coated layer, thereby meeting the use requirements of packaging and labeling.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, should be included in the scope of the present invention.
Claims (8)
1. The on-line coating low-peeling-force polyester release film is characterized by comprising a polyester base film and a release coating coated on the surface of one side of the polyester base film, wherein the polyester base film is composed of film-grade polyester resin, fluorine-containing polyester resin and antistatic polyester resin, and the weight percentages of the components are as follows: 80-90% of film-grade polyester resin, 5-10% of fluorine-containing polyester resin and 5-10% of antistatic polyester resin; the polyester basal membrane is of a single-layer structure and is prepared by melt extrusion and biaxial stretching, and the thickness of the polyester basal membrane is 20-60 microns.
2. The in-line coated low-peel-force polyester release film according to claim 1, wherein the release coating is formed by coating a release coating solution and baking and curing, and has a thickness of 1-5 μm.
3. The on-line coated low-peel-force polyester release film according to claim 1, wherein the release coating solution is prepared from a main agent, an auxiliary agent and a solvent, wherein the main agent is a matrix resin, methyldichlorosilane and a fluorine-containing polymer, and the weight percentage of the main agent is about 20-40% of that of the release coating solution; the auxiliary agent is isophorone diamine, 2, 6-di-tert-butyl-4-methylphenol, hydroxyethyl methacrylate, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, barium stearate, nano silicon dioxide, alkyl sodium sulfonate, octamethylcyclotetrasiloxane and a low-stripping force regulator, and the weight percentage of the auxiliary agent is about 10% -20% of that of the release coating liquid; the solvent is cyclohexanone, and the weight percentage of the solvent is about 40-70% of the release coating liquid.
4. The on-line coated low-peel-force polyester release film according to claim 1, wherein the polyester is any one or a mixture of polyethylene terephthalate resin, polyethylene naphthalate resin, 1.3 trimethylene terephthalate resin, polybutylene terephthalate resin, polyarylate resin or copolyester resin.
5. The method for preparing an in-line coated low-peel-force polyester release film according to claim 1, wherein the matrix resin is any one or a mixture of polycarbonate diol, polycaprolactone polyol or polyester polyol.
6. The in-line coated low-peel-force polyester release film according to claim 1, wherein the fluorine-containing polymer is one or more of perfluoroalkoxy resin, ethylene-tetrafluoroethylene copolymer, polychlorotrifluoroethylene, polyhexafluoropropylene, polytetrafluoroethylene, polyvinylidene fluoride, and ethylene-chlorotrifluoroethylene copolymer.
7. The in-line coated low-peel-force polyester release film according to claim 1, wherein the low-peel-force modifier is any one or a mixture of 4-ethoxy-1, 1, 1-trifluoro-3-buten-2-one, 4-butoxy-1, 1, 1-trifluoro-3-buten-2-one, and 1,1, 1-trifluoro-3-hepten-2-one.
8. An in-line coated low release force polyester release film and a method for preparing the same according to any one of claims 1 to 7, comprising the steps of:
step 1) preparation of release coating liquid: adding methyl dichlorosilane, a fluorine-containing polymer and a solvent into a container, and uniformly stirring for 5-8 minutes by a pneumatic stirrer to form a mixed solution, wherein the stirring speed is 500-800 r/min; then, adding hydroxypropyl methacrylate into the container, uniformly stirring for 5-10 minutes, increasing the stirring speed to 800-; then adding the matrix resin into a container, stirring for 5-10 minutes to obtain a mixture, and finally filtering the mixture through a filter screen to obtain a release coating liquid product;
step 2) preparing a base film mixture: preparing film-grade polyester, fluorine-containing polyester resin and antistatic polyester resin according to the weight percentage of each component, and sending the mixture into a drying kettle for drying, wherein the drying time is usually 2-4 hours, so as to obtain a base film material;
step 3) preparing an online coating low-peeling-force polyester release film: adding the prepared base film mixture into a screw extruder, and preparing a polyester base film with a single-layer structure through melt extrusion and bidirectional stretching; and then, uniformly coating the release coating liquid on one side surface of the polyester base film by an online coating method, carrying out baking curing treatment at the drying temperature of 80-120 ℃ for 10-20 seconds, and then rolling and packaging to obtain a finished product.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113978086A (en) * | 2021-12-23 | 2022-01-28 | 常州钟恒新材料股份有限公司 | Easily-stripped MLCC (multilayer ceramic capacitor) release film and preparation method thereof |
| CN116496706A (en) * | 2023-03-27 | 2023-07-28 | 惠州合益创光学材料有限公司 | Protective film for 3D curved screen and preparation method thereof |
| TWI816407B (en) * | 2022-05-24 | 2023-09-21 | 華碩電腦股份有限公司 | Elastic paint manufacutring method |
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| CN116496706A (en) * | 2023-03-27 | 2023-07-28 | 惠州合益创光学材料有限公司 | Protective film for 3D curved screen and preparation method thereof |
| CN116496706B (en) * | 2023-03-27 | 2023-10-27 | 惠州合益创光学材料有限公司 | Protective film for 3D curved screen and preparation method thereof |
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