CN111171751B - UV (ultraviolet) anti-adhesion film and preparation method thereof - Google Patents
UV (ultraviolet) anti-adhesion film and preparation method thereof Download PDFInfo
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- CN111171751B CN111171751B CN202010068327.8A CN202010068327A CN111171751B CN 111171751 B CN111171751 B CN 111171751B CN 202010068327 A CN202010068327 A CN 202010068327A CN 111171751 B CN111171751 B CN 111171751B
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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
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/062—Copolymers with monomers not covered by C09J133/06
- C09J133/066—Copolymers with monomers not covered by C09J133/06 containing -OH groups
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- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention discloses a UV (ultraviolet) anti-adhesive film, which comprises a base film and a UV anti-adhesive layer, wherein the UV anti-adhesive layer is a coating of a UV anti-adhesive agent, and the UV anti-adhesive agent comprises the following raw materials in percentage by mass: 80-85% of pressure-sensitive adhesive, wherein the pressure-sensitive adhesive comprises the following raw materials in percentage by mass: 55-65% of butyl acetate, 32-36% of butyl acrylate, 3-5% of acrylic acid, 2% of hydroxypropyl acrylate and 0.03-0.05% of first photoinitiator; 14-19% of photosensitive multifunctional oligomer; 0.1 to 0.4% of a polyisocyanate curing agent and 0.3 to 0.7% of a second photoinitiator. The invention also discloses a preparation method of the UV adhesive reducing film. Before ultraviolet irradiation, the peeling strength of the UV adhesive reducing film at 180 degrees reaches 15N/25 mm; after ultraviolet irradiation, the 180-degree peel strength is reduced to 0.3N/25mm, the product has photoinduced viscosity loss, and no adhesive residue is generated after the viscosity loss is separated from the object.
Description
Technical Field
The invention belongs to the technical field of adhesive films, and particularly relates to a UV (ultraviolet) anti-adhesive film and a preparation method thereof.
Background
Adhesive films are widely used as adhesive members in various application fields such as electronics, automobiles, and daily necessities because of their characteristics of good adhesiveness, stable properties, and easy handling. When high strength and long-term adhesion are required, a high-strength adhesive film is often used, and at the same time, the process of debonding the article from the adhesive film is more difficult to perform. For example, conventional adhesive films during electronic processing: due to the need to maintain a high viscosity during the manufacturing process, disassembly or pick-up of the finished product is difficult to achieve due to the inability to de-bond.
Disclosure of Invention
The invention aims to provide a UV (ultraviolet) anti-sticking film and a preparation method thereof, and aims to solve the technical problem that the adhesive film in the prior art cannot be anti-sticking.
In order to achieve the above purpose, an embodiment of the present invention provides a UV anti-adhesive film, which includes a base film and a UV anti-adhesive layer, where the UV anti-adhesive layer is a coating of a UV anti-adhesive, and the UV anti-adhesive includes the following raw materials by mass percent:
80-85% of pressure-sensitive adhesive, wherein the pressure-sensitive adhesive comprises the following raw materials in percentage by mass: 55-65% of butyl acetate, 30-38% of butyl acrylate, 3-5% of acrylic acid, 1-4% of hydroxypropyl acrylate and 0.03-0.05% of a first photoinitiator;
14-19% of photosensitive multifunctional oligomer;
0.1-0.4% of polyisocyanate curing agent; and
0.3 to 0.7% of a second photoinitiator.
Preferably, the first photoinitiator is photoinitiator 1173; the second photoinitiator comprises the following components: photoinitiator TPO and photoinitiator 1173, the mass ratio of the two being 1: 0.9 to 1.1.
Preferably, the number of functional groups of the photosensitive multifunctional oligomer is not less than 4.
Preferably, the material also comprises the following raw materials in percentage by mass: 0.1-0.3% of plasticizer and 0.1-0.3% of reactive diluent.
Preferably, the thickness of the UV anti-adhesion layer is 20-60 microns.
Preferably, the material of the base film is selected from any one of PE, PET, PVC, ABS or PP.
Preferably, the light transmittance of the base film is 92-96%.
The embodiment of the invention also provides a preparation method of the UV anti-adhesive film, which comprises the following steps:
1) weighing butyl acrylate, acrylic acid, hydroxypropyl acrylate, butyl acetate and a first photoinitiator according to a ratio, adding the mixture into a reaction container, uniformly stirring, and then irradiating by using a UV light source to initiate a reaction, wherein the reaction time is 10-30 min, and the reaction temperature is 90-100 ℃; cooling the product after the reaction is finished to obtain the pressure-sensitive adhesive;
2) weighing the pressure-sensitive adhesive, the photosensitive multifunctional oligomer, the polyisocyanate curing agent and the second photoinitiator according to the proportion, and mixing to obtain the UV visbreaking adhesive;
3) preparing a base film, uniformly coating the UV viscosity-reducing adhesive on the base film, coating the base film into a film with the thickness of 90-110 microns, heating and drying, and forming the UV viscosity-reducing layer on the base film to obtain the UV viscosity-reducing film.
Preferably, in the step 3), the drying device for heating and drying has at least 6 drying zones, the temperatures of the 6 drying zones are respectively set to 90-100 ℃, 100-110 ℃, 110-120 ℃, 100-110 ℃ and 90-100 ℃, and the drying time of the base film in each heating zone is 1-2 min.
Preferably, in the step 1), the wavelength of the UV light source is 370-400 nm, and the power is 230-250 mW/cm2。
The technical scheme or the technical schemes in the UV visbreaking film and the preparation method thereof provided by the embodiment of the invention at least have one of the following technical effects:
1. before the UV anti-sticking film is irradiated by ultraviolet light, the 180-degree peel strength reaches 24.4N/25 mm; after ultraviolet irradiation, the 180-degree peel strength is reduced to 0.09N/25mm, the product has photoinduced viscosity loss, and no adhesive residue is generated after the viscosity loss is separated from the object;
2. the UV visbreaking film is added with the plasticizer with the mass percent of 0.1-0.3%, so that the brittleness of a glue layer is improved, and the melt flowability is improved;
3. the proportion of the monomers is as follows: 55-65% of butyl acetate, 30-38% of butyl acrylate and 3-5% of acrylic acid; the glass transition temperature of the prepared pressure-sensitive adhesive is-49 to-32 ℃, the pressure-sensitive adhesive has good bonding property, and no adhesive residue exists;
4. the preparation method of the UV visbreaking film adopts a photo-initiated polymerization mode to prepare the UV visbreaking adhesive, the reaction rate is high, the reaction can be completed within 10-30 min, the conversion rate is up to 88%, the efficiency is high, and the reaction is less influenced by the temperature;
5. the UV visbreaking adhesive is dried by a multi-section drying method, and the formed UV visbreaking layer has the characteristics of smooth surface, no bubbles and transparency;
6. the optimal proportion of the polyisocyanate curing agent is 0.1-0.4%, and in the interval, the residual adhesive can be prevented from occurring during stripping, and other mechanical properties of the UV adhesive reducing film are not reduced and damaged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a UV anti-adhesive film according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the embodiments of the present invention, and should not be construed as limiting the invention.
Example 1
As shown in fig. 1, the UV anti-adhesive film provided in this embodiment includes a base film 200 and a UV anti-adhesive layer 100, where the UV anti-adhesive layer 100 is a coating of a UV anti-adhesive, and the UV anti-adhesive includes the following raw materials by mass percent: 80% of pressure sensitive adhesive, 19% of photosensitive multifunctional oligomer, 0.1% of polyisocyanate curing agent, 0.3% of second photoinitiator, 0.3% of plasticizer and 0.3% of reactive diluent.
The pressure-sensitive adhesive comprises the following raw materials in percentage by mass: 55% of butyl acetate, 38% of butyl acrylate, 5% of acrylic acid, 1.95% of hydroxypropyl acrylate and 0.05% of a first photoinitiator.
The first photoinitiator is photoinitiator 1173; the second photoinitiator comprises the following components: photoinitiator TPO and photoinitiator 1173, the mass ratio of the two being 1: 0.9. the manufacturers of the photoinitiator TPO and the photoinitiator 1173 are all new materials GmbH for Tianjin.
The number of functional groups of the photosensitive multifunctional oligomer is 4. The photosensitive multifunctional oligomer used in this example was a photocurable monomer with a trade name of EM241 produced by chang chemical.
The UV anti-adhesive layer 100 has a thickness of 20 microns. The base film 200 is made of PE. The base film 200 had a light transmittance of 92%.
The embodiment also provides a preparation method of the UV anti-adhesive film, which comprises the following steps:
1) weighing butyl acrylate, acrylic acid, hydroxypropyl acrylate, butyl acetate and a first photoinitiator according to a ratio, adding the mixture into a reaction container, uniformly stirring, and then irradiating by using a UV light source to initiate a reaction, wherein the reaction time is 10min and the reaction temperature is 100 ℃; cooling the product after the reaction is finished to obtain the pressure-sensitive adhesive;
2) weighing the pressure-sensitive adhesive, the photosensitive multifunctional oligomer, the polyisocyanate curing agent and the second photoinitiator according to the proportion, and mixing to obtain the UV visbreaking adhesive;
3) preparing a base film 200, uniformly coating the UV visbreaking adhesive on the base film 200, coating the UV visbreaking adhesive into a film with the thickness of 90 microns, heating and drying, and forming the UV visbreaking layer 100 on the base film 200 to obtain the UV visbreaking film.
In the step 3), the drying device used for heating and drying has 6 drying zones, the temperatures of the 6 drying zones are respectively set to 90 ℃, 100 ℃, 110 ℃, 100 ℃ and 90 ℃, and the drying time of the base film 200 in each heating zone is 2 min.
In the step 1), the wavelength of the UV light source is 370nm, and the power is 230mW/cm2。
Example 2
Example 2 differs from example 1 in that: the base film 200 is made of PET.
The rest of this embodiment is the same as embodiment 1, and the features not explained in this embodiment are explained by embodiment 1, which is not described again here.
Example 3
The present embodiment is different from embodiment 1 in that: the UV visbreaking adhesive provided by the embodiment comprises the following raw materials in percentage by mass: 82.9% of pressure sensitive adhesive, 16% of photosensitive multifunctional oligomer, 0.2% of polyisocyanate curing agent, 0.5% of second photoinitiator, 0.2% of plasticizer and 0.2% of reactive diluent.
The pressure-sensitive adhesive comprises the following raw materials in percentage by mass: 65% of butyl acetate, 30% of butyl acrylate, 3.97% of acrylic acid, 1% of hydroxypropyl acrylate and 0.03% of a first photoinitiator.
The second photoinitiator comprises the following components: photoinitiator TPO and photoinitiator 1173, the mass ratio of the two being 1: 1.0.
the UV visbreaking layer 100 has a thickness of 30 microns. The base film 200 is made of PVC. The base film 200 had a light transmittance of 93%.
The embodiment also provides a preparation method of the UV anti-adhesive film, which comprises the following steps:
1) weighing butyl acrylate, acrylic acid, hydroxypropyl acrylate, butyl acetate and a first photoinitiator according to a ratio, adding the mixture into a reaction container, uniformly stirring, and then irradiating by using a UV light source to initiate a reaction, wherein the reaction time is 20min, and the reaction temperature is 95 ℃; cooling the product after the reaction is finished to obtain the pressure-sensitive adhesive;
2) weighing the pressure-sensitive adhesive, the photosensitive multifunctional oligomer, the polyisocyanate curing agent and the second photoinitiator according to the proportion, and mixing to obtain the UV visbreaking adhesive;
3) preparing a base film 200, uniformly coating the UV visbreaking adhesive on the base film 200, coating the UV visbreaking adhesive into a film with the thickness of 100 microns, heating and drying, and forming the UV visbreaking layer 100 on the base film 200 to obtain the UV visbreaking film.
In step 3), the drying apparatus used for the heat drying has 6 drying zones, the temperatures of the 6 drying zones are respectively set to 95 ℃, 105 ℃, 115 ℃, 105 ℃ and 95 ℃, and the drying time of the base film 200 in each heating zone is 1.5 min.
In the step 1) of the process,the wavelength of the UV light source is 385nm, and the power is 240mW/cm2。
The rest of this embodiment is the same as embodiment 1, and the features not explained in this embodiment are explained by embodiment 1, which is not described again here.
Example 4
The present embodiment is different from embodiment 1 in that: the UV visbreaking adhesive provided by the embodiment comprises the following raw materials in percentage by mass: 84.7% of pressure sensitive adhesive, 14% of photosensitive multifunctional oligomer, 0.4% of polyisocyanate curing agent, 0.7% of second photoinitiator, 0.1% of plasticizer and 0.1% of reactive diluent.
The pressure-sensitive adhesive comprises the following raw materials in percentage by mass: 60% of butyl acetate, 32.96% of butyl acrylate, 3% of acrylic acid, 4% of hydroxypropyl acrylate and 0.04% of a first photoinitiator.
The second photoinitiator comprises the following components: photoinitiator TPO and photoinitiator 1173, the mass ratio of the two being 1: 1.1.
the number of functional groups of the photosensitive multifunctional oligomer is 6. The photosensitive multifunctional oligomer used in this example was a photocurable monomer with a trade name of EM265 produced by chang chemical.
The UV anti-adhesive layer 100 has a thickness of 60 microns. The base film 200 is made of ABS. The base film 200 has a light transmittance of 96%.
The embodiment of the invention also provides a preparation method of the UV anti-adhesive film, which comprises the following steps:
1) weighing butyl acrylate, acrylic acid, hydroxypropyl acrylate, butyl acetate and a first photoinitiator according to a ratio, adding the mixture into a reaction container, uniformly stirring, and then irradiating by using a UV light source to initiate a reaction, wherein the reaction time is 30min and the reaction temperature is 90 ℃; cooling the product after the reaction is finished to obtain the pressure-sensitive adhesive;
2) weighing the pressure-sensitive adhesive, the photosensitive multifunctional oligomer, the polyisocyanate curing agent and the second photoinitiator according to the proportion, and mixing to obtain the UV visbreaking adhesive;
3) preparing a base film 200, uniformly coating the UV visbreaking adhesive on the base film 200, coating the UV visbreaking adhesive into a film with the thickness of 110 microns, heating and drying, and forming the UV visbreaking layer 100 on the base film 200 to obtain the UV visbreaking film.
In the step 3), the drying device used for heating and drying has 6 drying zones, the temperatures of the 6 drying zones are respectively set to 100 ℃, 110 ℃, 120 ℃, 110 ℃ and 100 ℃, and the drying time of the base film 200 in each heating zone is 1 min.
In the step 1), the wavelength of the UV light source is 400nm, and the power is 250mW/cm2。
The rest of this embodiment is the same as embodiment 1, and the features not explained in this embodiment are explained by embodiment 1, which is not described again here.
Example 5
This embodiment is different from embodiment 4 in that: the UV visbreaking layer 100 is a coating of a UV visbreaking adhesive, and the UV visbreaking adhesive comprises the following raw materials in percentage by mass: 85% of pressure sensitive adhesive, 14.2% of photosensitive multifunctional oligomer, 0.2% of polyisocyanate curing agent and 0.6% of second photoinitiator. The base film 200 is made of PP.
The rest of this embodiment is the same as embodiment 4, and the features not explained in this embodiment are explained by embodiment 4, which is not described again here.
Example 6
In this embodiment, the initial adhesive property, the permanent adhesive property, the 180 ° peel strength, and the 180 ° peel strength after ultraviolet irradiation of the UV release film prepared in embodiments 1 to 5 are tested, and the test results are shown in table 1.
TABLE 1
Wherein the initial adhesion is tested according to the regulation of the national standard GB/T4852; the permanent adhesion is tested according to the regulation of national standard GB/T4851; the 180-degree peel strength is according to the national standardTesting is carried out according to the specification of GB/T2792; the peel strength of 180 degrees after the ultraviolet irradiation is realized by adopting an ultraviolet tube (the wavelength is 420nm, and the optical power is 19 mW/cm)2) After 20 seconds of irradiation, the test was carried out according to the regulations of the national Standard GB/T2792.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The UV visbreaking film comprises a base film and a UV visbreaking layer, wherein the UV visbreaking layer is a coating of a UV visbreaking adhesive, and the UV visbreaking adhesive comprises the following raw materials in percentage by mass:
80-85% of pressure-sensitive adhesive, wherein the pressure-sensitive adhesive comprises the following raw materials in percentage by mass: 55-65% of butyl acetate, 30-38% of butyl acrylate, 3-5% of acrylic acid, 1-4% of hydroxypropyl acrylate and 0.03-0.05% of a first photoinitiator;
14-19% of photosensitive multifunctional oligomer;
0.1-0.4% of polyisocyanate curing agent;
0.3-0.7% of a second photoinitiator;
0.1-0.3% of a plasticizer; and
0.1-0.3% of reactive diluent.
2. The UV detackifying film of claim 1, wherein the first photoinitiator is photoinitiator 1173; the second photoinitiator comprises the following components: photoinitiator TPO and photoinitiator 1173, the mass ratio of the two being 1: 0.9 to 1.1.
3. The UV adhesive reducing film according to claim 1, wherein the number of functional groups of the photosensitive multifunctional oligomer is not less than 4.
4. The UV adhesive reducing film according to any one of claims 1 to 3, wherein the thickness of the UV adhesive reducing layer is 20 to 60 μm.
5. The UV adhesive reducing film according to any one of claims 1 to 3, wherein the base film is made of any one material selected from PE, PET, PVC, ABS and PP.
6. The UV pressure-reducing film according to claim 5, wherein the base film has a light transmittance of 92 to 96%.
7. The method for preparing the UV adhesive reducing film according to any one of claims 1 to 6, comprising the steps of:
1) weighing butyl acrylate, acrylic acid, hydroxypropyl acrylate, butyl acetate and a first photoinitiator according to a ratio, adding the mixture into a reaction container, uniformly stirring, and then irradiating by using a UV light source to initiate a reaction, wherein the reaction time is 10-30 min, and the reaction temperature is 90-100 ℃; cooling the product after the reaction is finished to obtain the pressure-sensitive adhesive;
2) weighing the pressure-sensitive adhesive, the photosensitive multifunctional oligomer, the polyisocyanate curing agent and the second photoinitiator according to the proportion, and mixing to obtain the UV visbreaking adhesive;
3) preparing a base film, uniformly coating the UV viscosity-reducing adhesive on the base film, coating the base film into a film with the thickness of 90-110 microns, heating and drying, and forming the UV viscosity-reducing layer on the base film to obtain the UV viscosity-reducing film.
8. The method for preparing the UV anti-adhesive film according to claim 7, wherein in the step 3), the drying device used for heating and drying has at least 6 drying zones, the temperatures of the 6 drying zones are respectively set to 90-100 ℃, 100-110 ℃, 110-120 ℃, 100-110 ℃ and 90-100 ℃, and the drying time of the base film in each heating zone is 1-2 min.
9. The method for preparing the UV anti-adhesive film according to claim 7 or 8, wherein in the step 1), the wavelength of the UV light source is370-400 nm, and the power is 230-250 mW/cm2。
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| CN112680131A (en) * | 2020-11-25 | 2021-04-20 | 苏州赛伍应用技术股份有限公司 | PVC (polyvinyl chloride) substrate UV (ultraviolet) viscosity-reducing adhesive film for semiconductor chip film inversion and preparation method thereof |
| CN113429895B (en) * | 2021-07-21 | 2023-04-28 | 上海万生合金材料有限公司 | Mucous membrane reducing and preparation method thereof |
| CN113897168B (en) * | 2021-10-26 | 2024-06-04 | 湖北大学 | UV anti-adhesive solution, single-sided UV anti-adhesive protective film and preparation method |
| CN115477916A (en) * | 2022-08-09 | 2022-12-16 | 浙江铭天电子新材料有限公司 | UV (ultraviolet) anti-adhesion film for wafer grinding substrate |
| CN117659883A (en) * | 2024-02-01 | 2024-03-08 | 上海精珅新材料有限公司 | UV (ultraviolet) mucosa-reducing film and preparation method thereof |
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