CN111218236A - Ultra-light high-residue high-smoothness release film and preparation method thereof - Google Patents

Ultra-light high-residue high-smoothness release film and preparation method thereof Download PDF

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Publication number
CN111218236A
CN111218236A CN201811469963.0A CN201811469963A CN111218236A CN 111218236 A CN111218236 A CN 111218236A CN 201811469963 A CN201811469963 A CN 201811469963A CN 111218236 A CN111218236 A CN 111218236A
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film
release
smoothness
preparation
release film
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李刚
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Yangzhou Alvin Film Co ltd
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Yangzhou Alvin Film Co ltd
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Priority to CN201811469963.0A priority Critical patent/CN111218236A/en
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00Adhesives in the form of films or foils
    • C09J7/40Adhesives in the form of films or foils characterised by release liners
    • C09J7/401Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02Non-macromolecular additives
    • C09J11/06Non-macromolecular additives organic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J183/00Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
    • C09J183/04Polysiloxanes
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00Adhesives in the form of films or foils
    • C09J7/40Adhesives in the form of films or foils characterised by release liners
    • C09J7/405Adhesives in the form of films or foils characterised by release liners characterised by the substrate of the release liner
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2467/00Presence of polyester
    • C09J2467/005Presence of polyester in the release coating

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses an ultra-light high-residue high-smoothness release film and a preparation method thereof. The silicone oil surface of the release film prepared by the invention is smooth, the release force is small, the separation is easy, no silicone oil residue is left on the adhesive tape after the separation, the product performance is stable, and the yield is high.

Description

Ultra-light high-residue high-smoothness release film and preparation method thereof
Technical Field
The invention relates to the technical field of film manufacturing, in particular to an ultra-light high-residue high-smoothness release film and a preparation method thereof.
Background
The release film refers to a film having a surface with separability, and the release film is not sticky or slightly sticky after being contacted with a specific material under limited conditions. The release film generally comprises a film substrate and a release agent coated on the substrate, the release agent used as the release film at present is mainly an organic silicon release agent, the release agent can be heated and cured, but the release film produced at present in China by adopting organic silicon as the release agent often has the phenomena of reverse peeling, uneven coating and oil discharge; the reverse stripping is that the coating on the release film is taken away by the adhesive film with larger binding force, and a release film coating area which is difficult to clean is formed on the local part of the adhesive film, so that the overall purity and consistency of the adhesive film are damaged; the oil yielding phenomenon is that unreacted micromolecules in the release agent permeate out, so that the release surface of the release film is greasy, and even the back of the base material is greasy through the film base material with deep concave holes after corona treatment; all these phenomena are related to the material system of the release agent. The existing material system of the release agent is mostly a material system which is formed by taking vinyl organic silicon resin as a main raw material and matching with some functional additives according to functions required by the application field of the release film, and because the vinyl organic silicon resin is directly liquid resin with small molecular weight, the resin with small molecular weight has low crosslinking degree, the mechanical strength of colloid is not high enough, and a release layer with low mechanical strength is easy to generate the phenomena of reverse peeling and oil production; the vinyl organic silicon resin with large molecular weight can increase the crosslinking degree, but is not easy to disperse when being directly used because of being powdery.
Disclosure of Invention
The invention aims to provide an ultralight high-residue high-smoothness release film and a preparation method thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
the ultra-light high-residue high-smoothness release film comprises a film base material and a release layer, wherein the film base material is one of a PET film, a PBT film, a PENT film or a PBNT film, and the release layer comprises the following components in parts:
Figure BDA0001890672960000021
preferably, the vinyl-terminated silicone resin has a viscosity of 500-5000mpas and a vinyl molar percentage of 0.2-1.0%.
Preferably, the cross-linking agent is obtained by mixing diisocyanate and the gleditsia sinensis extract in a ratio of 20: 1.
Preferably, the hydrogen-containing silicone oil has the viscosity of 200-500mpas and the hydrogen-containing molar ratio percentage of 0.2-1.4%.
Preferably, the initiator is one or more of lauroyl oxide, benzoyl peroxide or dicumyl peroxide.
Preferably, the film substrate is a PET film with the thickness of 25-100 μm.
A preparation method of an ultralight high-residue high-smoothness release film comprises the following steps:
step 1) preparation of a film substrate: purifying and corona or plasma treating the surface of the film base material;
step 2) preparation of the gleditsia sinensis extract: cleaning fructus Gleditsiae Abnormalis, drying, pulverizing, sieving with 40-60 mesh sieve, adding water, microwave extracting, concentrating, and drying to obtain fructus Gleditsiae Abnormalis extract;
step 3) uniformly mixing the gleditsia sinensis extract and diisocyanate in a ratio of 20:1 to prepare a cross-linking agent;
step 4) preparation of a release agent: weighing the components according to the formula of a release agent, adding an organic silicon prepolymer, a vinyl end group organic silicon resin, an initiator, a platinum catalyst and a crosslinking agent into a reactor, stirring and mixing uniformly at the rotating speed of 400rpm/60min, then adding hydrogen-containing silicone oil, and stirring and mixing uniformly at 800rpm/60 min;
step 5) coating a release agent on the treated film substrate and drying, wherein the wet coating amount of the release agent is 3g/m2-15g/m2, and the drying temperature is 80-150 ℃;
and 6) rolling and packaging the dried release film.
Compared with the prior art, the invention has the beneficial effects that:
the invention adds the gleditsia sinensis extract, the gleditsia sinensis tree belongs to the order of rosettes, the deciduous tree or the small tree of the family leguminosae, the fruit of the gleditsia sinensis tree is used as a washing product, and the invention has good lubricity and rheological property. The addition of the gleditsia sinensis extract can enable the combination of the mixed release agent to be more stable, the molecular structure of the silicone oil surface of the release film to be more compact, and the silicone oil surface to be smoother.
According to the invention, the organic silicon prepolymer and the vinyl end group organic silicon resin are added into the release agent, so that the residual rate of the release film is greatly improved, and the quality of the film is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A preparation method of an ultralight high-residue high-smoothness release film comprises the following steps:
step 1) preparation of a film substrate: selecting a PET film with the thickness of 25 mu m, and carrying out purification treatment on the surface;
step 2) preparation of the gleditsia sinensis extract: cleaning fructus Gleditsiae Abnormalis, drying, pulverizing, sieving with 40 mesh sieve, adding water, microwave extracting, concentrating, and drying to obtain fructus Gleditsiae Abnormalis extract;
step 3) uniformly mixing the gleditsia sinensis extract and diisocyanate in a ratio of 20:1 to prepare a cross-linking agent;
step 4) preparation of a release agent: weighing the components according to the weight of a formula of a release agent, adding 50 parts of an organic silicon prepolymer, 25 parts of a vinyl end group organic silicon resin, 0.1 part of lauroyl oxide, 0.05 part of a platinum catalyst and 1 part of a cross-linking agent into a reactor, uniformly stirring and mixing at the rotating speed of 400rpm/60min, then adding 5 parts of hydrogen-containing silicone oil, uniformly stirring and mixing at the rotating speed of 800rpm/60min, wherein the viscosity of the vinyl end group organic silicon resin is 500mpas, and the vinyl molar percentage is 0.2%;
step 5) coating a release agent on the treated film substrate and drying, wherein the wet coating amount of the release agent is 3g/m2, and the drying temperature is 80 ℃;
and 6) rolling and packaging the dried release film.
Example 2
A preparation method of an ultralight high-residue high-smoothness release film comprises the following steps:
step 1) preparation of a film substrate: selecting a PET film base material with the thickness of 60 mu m, and carrying out purification treatment on the surface;
step 2) preparation of the gleditsia sinensis extract: cleaning fructus Gleditsiae Abnormalis, drying, pulverizing, sieving with 50 mesh sieve, adding water, microwave extracting, concentrating, and drying to obtain fructus Gleditsiae Abnormalis extract;
step 3) uniformly mixing the gleditsia sinensis extract and diisocyanate in a ratio of 20:1 to prepare a cross-linking agent;
step 4) preparation of a release agent: weighing the components according to the weight of the formula of a release agent, adding 60 parts of an organic silicon prepolymer, 35 parts of vinyl end group organic silicon resin, 0.2 part of benzoyl peroxide, 0.08 part of platinum catalyst and 2 parts of a cross-linking agent into a reactor, stirring and mixing uniformly at the rotating speed of 400rpm/60min, then adding 15 parts of hydrogen-containing silicone oil, stirring and mixing uniformly at the rotating speed of 800rpm/60 min; the vinyl-terminated silicone resin has a viscosity of 2000mpas and a vinyl molar percentage of 0.7 percent, and the hydrogen-containing silicone oil has a viscosity of 350mpas and a hydrogen-containing molar percentage of 0.8 percent;
step 5) coating a release agent on the treated film substrate and drying, wherein the wet coating amount of the release agent is 7g/m2, and the drying temperature is 110 ℃;
and 6) rolling and packaging the dried release film.
Example 3
A preparation method of an ultralight high-residue high-smoothness release film comprises the following steps:
step 1) preparation of a film substrate: selecting a PET film with the thickness of 100 mu m, and carrying out plasma treatment on the surface of a base material;
step 2) preparation of the gleditsia sinensis extract: cleaning fructus Gleditsiae Abnormalis, drying, pulverizing, sieving with 60 mesh sieve, adding water, microwave extracting, concentrating, and drying to obtain fructus Gleditsiae Abnormalis extract;
step 3) uniformly mixing the gleditsia sinensis extract and diisocyanate in a ratio of 20:1 to prepare a cross-linking agent;
step 4) preparation of a release agent: weighing the components according to the weight of the formula of a release agent, adding 75 parts of an organic silicon prepolymer, 40 parts of vinyl end group organic silicon resin, 0.3 part of dicumyl peroxide, 0.1 part of platinum catalyst and 3 parts of a cross-linking agent into a reactor, stirring and mixing uniformly at the rotating speed of 400rpm/60min, then adding 25 parts of hydrogen-containing silicone oil, and stirring and mixing uniformly at the rotating speed of 800rpm/60 min; the vinyl-terminated organic silicon resin has the viscosity of 5000mpas and the mol percent of vinyl is 1.0 percent, and the hydrogen-containing silicone oil has the viscosity of 500mpas and the mol percent of hydrogen is 1.4 percent;
step 5) coating a release agent on the treated film substrate and drying, wherein the wet coating amount of the release agent is 15g/m2, and the drying temperature is 150 ℃;
and 6) rolling and packaging the dried release film.
The above examples 1-3 were tested and the results are given in the following table:
Figure BDA0001890672960000051
Figure BDA0001890672960000061
the method for testing the release force comprises the following steps:
taking an adhesive tape to be attached to a testing surface of the film, namely an off-surface, rolling the adhesive tape by a rolling roller in a reciprocating manner, standing the adhesive tape after the adhesive tape is attached, then attaching a double-sided adhesive tape to a non-testing surface of a sample wafer and fixing the sample wafer on a standard steel plate to be tested, and testing the sample wafer for 3 times in the same embodiment to take an average value as a testing result;
the residual adhesion was measured as follows:
after the adhesive tape is attached to the release surface of the release film for a certain time, peeling the adhesive tape from the release surface of the release film, and testing the adhesive force value of the adhesive tape to set the adhesive force value as B; the adhesive tape is not adhered to the release surface of the release film, the adhesive force value is directly tested, and if the value is A, the residual adhesion rate is (B/A) × 100%;
according to the numerical values of the release force and the smoothness, after the gleditsia sinensis lam extract is added, the stability of the release force is good, the release force is improved again, the performance is good, the silicone oil surface is smooth, and no residue exists.
From the data of the residual adhesion rate, it was found that the residual adhesion rate was high and the film quality was high.
While the invention has been described in detail, it will be apparent to those skilled in the art that various changes, modifications, and equivalents may be made therein without departing from the spirit and scope of the invention.

Claims (7)

1. The utility model provides a high level and smooth type membrane of surplus of ultralight which characterized in that: the release film comprises a film substrate and a release layer, wherein the film substrate is one of a PET film, a PBT film, a PENT film or a PBNT film, and the release layer comprises the following components in parts:
Figure FDA0001890672950000011
2. the ultra-light high-residue high-smoothness release film according to claim 1, characterized in that: the vinyl-terminated organosilicon resin has a viscosity of 500-5000mpas and a vinyl molar percentage of 0.2-1.0%.
3. The ultra-light high-residue high-smoothness release film according to claim 1, characterized in that: the cross-linking agent is obtained by mixing diisocyanate and the gleditsia sinensis extract in a ratio of 20: 1.
4. The ultra-light high-residue high-smoothness release film according to claim 1, characterized in that: the hydrogen-containing silicone oil has the viscosity of 200-500mpas and the hydrogen-containing molar ratio percentage of 0.2-1.4%.
5. The ultra-light high-residue high-smoothness release film according to claim 1, characterized in that: the initiator is one or more of lauroyl oxide, benzoyl peroxide or dicumyl peroxide.
6. The ultra-light high-residue high-smoothness release film according to claim 1, characterized in that: the film base material is a PET film with the thickness of 25-100 μm.
7. The preparation method of the ultralight high-residue high-smoothness release film of claims 1-6, characterized by comprising the following steps:
step 1) preparation of a film substrate: purifying and corona or plasma treating the surface of the film base material;
step 2) preparation of the gleditsia sinensis extract: cleaning fructus Gleditsiae Abnormalis, drying, pulverizing, sieving with 40-60 mesh sieve, adding water, microwave extracting, concentrating, and drying to obtain fructus Gleditsiae Abnormalis extract;
step 3) uniformly mixing the gleditsia sinensis extract and diisocyanate in a ratio of 20:1 to prepare a cross-linking agent;
step 4) preparation of a release agent: weighing the components according to the formula of a release agent, adding an organic silicon prepolymer, a vinyl end group organic silicon resin, an initiator, a platinum catalyst and a crosslinking agent into a reactor, stirring and mixing uniformly at the rotating speed of 400rpm/60min, then adding hydrogen-containing silicone oil, and stirring and mixing uniformly at 800rpm/60 min;
step 5) coating a release agent on the treated film substrate and drying, wherein the wet coating amount of the release agent is 3g/m2-15g/m2, and the drying temperature is 80-150 ℃;
and 6) rolling and packaging the dried release film.
CN201811469963.0A 2018-11-27 2018-11-27 Ultra-light high-residue high-smoothness release film and preparation method thereof Pending CN111218236A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112759779A (en) * 2020-12-30 2021-05-07 南京科悦新材料有限公司 Super-flexible release film and preparation method thereof
CN113444449A (en) * 2021-07-15 2021-09-28 惠州市永卓科技有限公司 Ultraviolet-cured solvent-free release silicone oil and preparation method thereof
CN114539583A (en) * 2022-02-10 2022-05-27 东莞澳中新材料科技股份有限公司 Release film and application thereof
CN114908604A (en) * 2022-05-16 2022-08-16 江苏至昕新材料有限公司 Organic silicon release agent for low-release-force PET (polyethylene terephthalate) film and preparation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112759779A (en) * 2020-12-30 2021-05-07 南京科悦新材料有限公司 Super-flexible release film and preparation method thereof
CN113444449A (en) * 2021-07-15 2021-09-28 惠州市永卓科技有限公司 Ultraviolet-cured solvent-free release silicone oil and preparation method thereof
CN114539583A (en) * 2022-02-10 2022-05-27 东莞澳中新材料科技股份有限公司 Release film and application thereof
CN114908604A (en) * 2022-05-16 2022-08-16 江苏至昕新材料有限公司 Organic silicon release agent for low-release-force PET (polyethylene terephthalate) film and preparation method thereof

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