CN113214752A - TPU (thermoplastic polyurethane) protective film with self-repairing surface and preparation method thereof - Google Patents
TPU (thermoplastic polyurethane) protective film with self-repairing surface 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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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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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- 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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
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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
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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
- C09J2433/00—Presence of (meth)acrylic polymer
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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
-
- 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
- C09J2475/00—Presence of polyurethane
- C09J2475/006—Presence of polyurethane in the substrate
Abstract
The invention discloses a TPU (thermoplastic polyurethane) protective film with a self-repairing surface, which comprises a protective film, a surface self-repairing layer, a base film, an acrylic adhesive layer and a release film, wherein the acrylic adhesive layer is covered on the release film, the base film is covered on the acrylic adhesive layer, the surface self-repairing layer is covered on the base film, the protective film is covered on the surface self-repairing layer, a TPU material is adopted to be used as the base film, the phenomenon that after OCA is coated on PET (polyethylene terephthalate) and then die cutting is carried out for hot bending can be avoided, the OCA is easy to fall off in a high-temperature process, certain resilience can be generated after a part of film materials are subjected to hot bending forming, the edge is white or four corners are warped, the TPU protective film is soft and good in adhesion, the total thickness of the TPU protective film on the self-repairing surface is 110-160 mu m, 1-3 s of self-repairing scratches and the pencil hardness H is excellent in optical performance, the transmittance is more than or equal to 91% and the haze is less than or equal to 0.5%, the protective film is softer than 1200gf/25mm, the anti-sticking anti-.
Description
Technical Field
The invention relates to the technical field of adhesive tapes, in particular to a TPU (thermoplastic polyurethane) protective film with a self-repairing surface and a preparation method thereof.
Background
With the development of science and technology, curved screens are becoming popular, but curved screens are fragile, and the curved surface amplitude becomes big so that the protection of screen needs to be pasted with protection film. The curved membrane of 3D heat today is coated OCA back die-cutting on PET and is carried out the hot-bending, and the curved in-process of 3D heat, OCA easily take off at high temperature in-process, and certain resilience can appear after the shaping is bent to partial membrane material heat, causes the edge to be white edge or four corners and rises to stick up, and the disability rate is high. The OCA glue can not be recovered after being deformed, and the mobile phone cannot be effectively protected. In addition, the OCA elastic effect of the 3D hot bending film is poor, and the buffer protection effect cannot be achieved.
The surface of the existing 3D hot bending film is not provided with a self-repairing function after being scratched, and the 3D hot bending film influences the sensitivity and the appearance of a screen after being scratched, so that the use experience is influenced. The existing curved-surface film does not have the grease-proof performance, and fingerprints, sweat stains and grease are attached to the film frequently when a screen is used.
Disclosure of Invention
The invention aims to provide a TPU (thermoplastic polyurethane) protective film with a self-repairing surface and a preparation method thereof, and aims to solve the problems that the existing 3D hot bending film does not have a self-repairing function after being scratched in the background technology, and the 3D hot bending film influences the sensitivity and the appearance of a screen and influences the use experience after being scratched. The existing curved-surface film does not have the grease-proof performance, and the problems that fingerprints, sweat stains and grease are attached to the film frequently occur when a screen is used.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a TPU protection film with selfreparing surface, includes protection film, surface self-repairing layer, base film, ya keli glue film and leaves the type membrane, the ya keli glue film covers on leaving the type membrane, the base film covers on the ya keli glue film, surface self-repairing layer covers on the base film, the protection film covers on surface self-repairing layer.
Preferably, the protective film is a PET protective film, and the thickness of the PET protective film is 80-100 mu m.
Preferably, the surface self-repairing layer is UV curing repairing glue layer glue, the thickness is 10-30 μm, and the water drop angle is 100-110 degrees;
the UV curing repair glue layer glue consists of the following components: 100 parts of UV acrylic glue, 0.5-1 part of fluorine-containing acrylic compound, 0.1-4 parts of isocyanate curing agent and 20-50 parts of solvent.
Preferably, the UV acrylic glue is prepared by polymerizing 30-35 parts of butyl acetate, 13-20 parts of butyl acrylate, 10-13 parts of methyl methacrylate, 1-3 parts of hydroxypropyl acrylate, 8-14 parts of acrylic acid, 1-5 parts of polysiloxane series compounds and 10-14 parts of photosensitive multifunctional oligomer in 20-50 parts of ethyl acetate solvent through 0.1-0.5 part of photoinitiator 1173, wherein the solid content of the UV acrylic glue is 30-50%;
the solvent is ethyl acetate.
Preferably, the base film is a TPU base film, and the thickness of the TPU base film is 80-100 mu m.
Preferably, the acrylic adhesive layer is formed by coating thermosetting acrylic glue, the thickness is 20-30 mu m, and the viscosity is more than 1200gf/25 mm;
the acrylic adhesive layer comprises the following components: 100 parts of acrylic glue, 1-10 parts of modified resin, 0.1-4 parts of isocyanate curing agent and 20-40 parts of solvent.
Preferably, the UV acrylic acid acrylic glue is prepared by polymerizing 20-27 parts of acrylic acid, 25-37 parts of butyl acrylate, 20-26 parts of methyl methacrylate and 7-13 parts of hydroxyethyl methacrylate in 30-40 parts of ethyl acetate solvent through 0.4-0.7 part of initiator dibenzoyl peroxide, wherein the solid content of the acrylic acid acrylic glue is 30-50%;
the modified resin is one or more combined cylinders of phenolic resin, terpene resin and aromatic petroleum resin;
the solvent is ethyl acetate.
Preferably, the release film is a PET release film.
A preparation method of a TPU protective film with a self-repairing surface comprises the following steps:
step one, adding a fluorine-containing propylene compound into a solvent, and uniformly mixing;
step two, adding the mixed solution obtained in the step one into UV acrylic acid acrylic glue, and stirring and mixing uniformly;
adding an isocyanate curing agent into a solvent to obtain a curing agent solution;
step four, adding the curing agent solution into the UV acrylic acid glue in the step two, and stirring and mixing uniformly;
coating the glue in the step (IV) on the back of the TPU base film by using a coating machine, performing thermal curing at 100-120 ℃, and performing ultraviolet curing to obtain a UV curing repair glue layer;
sixthly, rolling the tail attaching protective film;
step seven, dissolving the modified resin in a solvent at room temperature to obtain a modified resin solution;
step eight, adding the solution obtained in the step seven into acrylic acid acrylic glue, and uniformly mixing;
dissolving an isocyanate curing agent in a solvent to obtain a curing agent solution;
step ten, adding the solution in the step (nine) into the acrylic acid acrylic glue in the step (eight), and fully and uniformly stirring;
step eleven, coating the acrylic glue water obtained in the step (ten) on the UV curing repair glue layer by using a coating machine, and obtaining the acrylic glue layer by coating the acrylic glue water on the UV curing repair glue layer at the linear speed of 10-30 m/min by using the coating machine, at the drying oven temperature of 80-120 ℃ and for the drying time of 2-5 min;
step twelve, rolling the machine tail laminated release film;
and thirteen, putting the rolled TPU protective film with the self-repairing surface into a curing chamber at 40 ℃ for curing for 48H, so that the acrylic adhesive layer is cured.
Compared with the prior art, the invention has the beneficial effects that: a TPU protective film with a self-repairing surface and a preparation method thereof adopt a TPU material as a base film, can avoid hot bending of die cutting after OCA is coated on PET, OCA is easy to be separated in a high-temperature process, certain resilience can occur after part of film materials are subjected to hot bending forming, the edge is white or four corners are warped, and the TPU film material as the base film is soft and has good adhesion;
the TPU base film is coated with the UV curing repairing glue layer glue on the back, so that the scratch and scratch repairing effect can be achieved after UV light curing, and a screen can be better protected;
the special UV acrylic glue is adopted, so that the adhesive force performance is stable, the ageing resistance is realized, the special UV acrylic glue has certain excellent optical performance characteristics, the glue is soft, the adhesion is easy, and the exhaust effect is realized;
the total thickness of the TPU protective film on the self-repairing surface is 110-160 mu m, 1-3 s of self-repairing scratches and pencil hardness H, the optical performance is excellent, the transmittance is more than or equal to 91%, the haze is less than or equal to 0.5%, the protective film is softer and has the viscosity of more than 1200gf/25mm, and the protective film has the characteristics of no edge warping when being attached to a curved screen of a mobile phone, AF fingerprint resistance and grease resistance.
Drawings
FIG. 1 is a schematic sectional view and a front view of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
Referring to fig. 1, the present invention provides a technical solution: the utility model provides a TPU protection film with selfreparing surface, includes protection film, surface self-repairing layer, base film, ya keli glue film and leaves the type membrane, the ya keli glue film covers on leaving the type membrane, the base film covers on the ya keli glue film, surface self-repairing layer covers on the base film, the protection film covers on surface self-repairing layer.
Specifically, the protective film is a PET protective film, and the thickness of the protective film is 80-100 mu m.
Specifically, the surface self-repairing layer is UV curing repairing glue layer glue, the thickness of the surface self-repairing layer glue is 10-30 microns, the surface self-repairing layer glue has self-repairing capability within 1-3 s in a short time, the water drop angle of the surface self-repairing layer glue is 100-110 degrees, and the surface self-repairing layer glue can prevent fingerprints and grease in AF;
the UV curing repair glue layer glue consists of the following components: 100 parts of UV acrylic glue, 0.5-1 part of fluorine-containing acrylic compound, 0.1-4 parts of isocyanate curing agent and 20-50 parts of solvent, and the UV acrylic glue can play a role in repairing scratches and scratches after UV photocuring and can better protect a screen.
Specifically, the UV acrylic glue is prepared by polymerizing 30-35 parts of butyl acetate, 13-20 parts of butyl acrylate, 10-13 parts of methyl methacrylate, 1-3 parts of hydroxypropyl acrylate, 8-14 parts of acrylic acid, 1-5 parts of polysiloxane series compounds and 10-14 parts of photosensitive multifunctional oligomer in 20-50 parts of ethyl acetate serving as a solvent by 0.1-0.5 part of a photoinitiator 1173, wherein the solid content of the UV acrylic glue is 30-50%;
the solvent is ethyl acetate.
Particularly, the base film is the TPU base film, and its thickness is 80 ~ 100 mu m, adopts the TPU material to make the base film, can avoid coating OCA on PET back die cutting to carry out the hot bending, and OCA easily takes off at high temperature in-process, can appear certain resilience after partial membrane material hot bending shaping, causes the edge to be white limit or four corners and rises to stick up, and TPU does that the base film membrane material is soft, and the adhesion nature is good.
Specifically, the acrylic adhesive layer is formed by coating thermosetting acrylic glue, the thickness of the acrylic adhesive layer is 20-30 microns, the viscosity of the acrylic adhesive layer is greater than 1200gf/25mm, and the acrylic adhesive layer is not warped and not peeled off after being attached to curved glass for 30 days;
the acrylic adhesive layer comprises the following components: 100 parts of acrylic glue, 1-10 parts of modified resin, 0.1-4 parts of isocyanate curing agent and 20-40 parts of solvent.
Specifically, the UV acrylic acid acrylic glue is formed by polymerizing 20-27 parts of acrylic acid, 25-37 parts of butyl acrylate, 20-26 parts of methyl methacrylate and 7-13 parts of hydroxyethyl methacrylate in 30-40 parts of ethyl acetate solvent through 0.4-0.7 part of initiator dibenzoyl peroxide, the solid content of the acrylic acid acrylic glue is 30-50%, the special UV acrylic acid glue is adopted, the adhesive force performance is stable, the ageing resistance is realized, the UV acrylic acid acrylic glue has the characteristic of certain excellent optical performance, the glue is soft, the adhesion is easy, and the exhaust effect is realized.
The modified resin is one or more combined cylinders of phenolic resin, terpene resin and aromatic petroleum resin;
the solvent is ethyl acetate.
Specifically, the release film is a PET release film.
A preparation method of a TPU protective film with a self-repairing surface comprises the following steps:
step one, adding a fluorine-containing propylene compound into a solvent, and uniformly mixing;
step two, adding the mixed solution obtained in the step one into UV acrylic acid acrylic glue, and stirring and mixing uniformly;
adding an isocyanate curing agent into a solvent to obtain a curing agent solution;
step four, adding the curing agent solution into the UV acrylic acid glue in the step two, and stirring and mixing uniformly;
coating the glue in the step (IV) on the back of the TPU base film by using a coating machine, performing thermal curing at 100-120 ℃, and performing ultraviolet curing to obtain a UV curing repair glue layer;
sixthly, rolling the tail attaching protective film;
step seven, dissolving the modified resin in a solvent at room temperature to obtain a modified resin solution;
step eight, adding the solution obtained in the step seven into acrylic acid acrylic glue, and uniformly mixing;
dissolving an isocyanate curing agent in a solvent to obtain a curing agent solution;
step ten, adding the solution in the step (nine) into the acrylic acid acrylic glue in the step (eight), and fully and uniformly stirring;
step eleven, coating the acrylic glue water obtained in the step (ten) on the UV curing repair glue layer by using a coating machine, and obtaining the acrylic glue layer by coating the acrylic glue water on the UV curing repair glue layer at the linear speed of 10-30 m/min by using the coating machine, at the drying oven temperature of 80-120 ℃ and for the drying time of 2-5 min;
step twelve, rolling the machine tail laminated release film;
and thirteen, putting the rolled TPU protective film with the self-repairing surface into a curing chamber at 40 ℃ for curing for 48H, so that the acrylic adhesive layer is cured.
Test data of the sample:
the working principle is as follows: the TPU protective film on the self-repairing surface has the total thickness of 110-160 mu m, the surface has scratch self-repairing capability, scratches can be automatically repaired within 1-3 s when scratches are formed on the surface, the pencil hardness is tested to be H hardness, the optical performance is excellent, the transmittance is more than or equal to 91 percent, the haze is less than or equal to 0.5 percent, the TPU protective film is soft, has the viscosity of more than 1200gf/25mm, can be well attached to a curved surface, does not warp edges for a long time, has the characteristics of AF fingerprint resistance and oil stain resistance and brings better experience of a curved screen, when the TPU protective film is used, the sticky surface is attached to the curved screen, the protective film has an automatic exhaust effect, is attached to the curved screen, is firm in adhesion, does not warp edges, does not generate relative displacement, has strong scratch resistance, can automatically repair scratch scratches and places, and is simple to use and stable in quality Easy to realize and is beneficial to wide popularization and application.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a TPU protection film with selfreparing surface which characterized in that, includes protection film, surface self-repairing layer, base film, ya keli glue film and leaves the type membrane, ya keli glue film covers on leaving the type membrane, the base film covers on the ya keli glue film, surface self-repairing layer covers on the base film, the protection film covers on surface self-repairing layer.
2. The TPU protective film with the self-healing surface of claim 1, wherein: the protective film is a PET protective film, and the thickness of the protective film is 80-100 mu m.
3. The TPU protective film with the self-healing surface of claim 1, wherein: the surface self-repairing layer is made of UV curing repairing glue layer glue, the thickness of the surface self-repairing layer glue is 10-30 mu m, and the water drop angle of the surface self-repairing layer glue is 100-110 degrees;
the UV curing repair glue layer glue consists of the following components: 100 parts of UV acrylic glue, 0.5-1 part of fluorine-containing acrylic compound, 0.1-4 parts of isocyanate curing agent and 20-50 parts of solvent.
4. The TPU protective film with the self-healing surface of claim 3, wherein: the UV acrylic glue is prepared by polymerizing 30-35 parts of butyl acetate, 13-20 parts of butyl acrylate, 10-13 parts of methyl methacrylate, 1-3 parts of hydroxypropyl acrylate, 8-14 parts of acrylic acid, 1-5 parts of polysiloxane series compounds and 10-14 parts of photosensitive multifunctional oligomer in 20-50 parts of ethyl acetate solvent through 0.1-0.5 part of photoinitiator 1173, wherein the solid content of the UV acrylic glue is 30-50%;
the solvent is ethyl acetate.
5. The TPU protective film with the self-healing surface of claim 1, wherein: the base film is a TPU base film, and the thickness of the TPU base film is 80-100 mu m.
6. The TPU protective film with the self-healing surface of claim 1, wherein: the acrylic adhesive layer is formed by coating thermosetting acrylic glue, the thickness of the acrylic adhesive layer is 20-30 mu m, and the viscosity of the acrylic adhesive layer is greater than 1200gf/25 mm;
the acrylic adhesive layer comprises the following components: 100 parts of acrylic glue, 1-10 parts of modified resin, 0.1-4 parts of isocyanate curing agent and 20-40 parts of solvent.
7. The TPU protective film with the self-healing surface of claim 6, wherein: the UV acrylic acid glue is prepared by polymerizing 20-27 parts of acrylic acid, 25-37 parts of butyl acrylate, 20-26 parts of methyl methacrylate and 7-13 parts of hydroxyethyl methacrylate in 30-40 parts of ethyl acetate solvent through 0.4-0.7 part of initiator dibenzoyl peroxide, and the solid content of the acrylic acid glue is 30-50%;
the modified resin is one or more combined cylinders of phenolic resin, terpene resin and aromatic petroleum resin;
the solvent is ethyl acetate.
8. The TPU protective film with the self-healing surface of claim 1, wherein: the release film is a PET release film.
9. A method for preparing the TPU protective film with the self-repairing surface as described in any one of claims 1-8, comprising the following steps:
step one, adding a fluorine-containing propylene compound into a solvent, and uniformly mixing;
step two, adding the mixed solution obtained in the step one into UV acrylic acid acrylic glue, and stirring and mixing uniformly;
adding an isocyanate curing agent into a solvent to obtain a curing agent solution;
step four, adding the curing agent solution into the UV acrylic acid glue in the step two, and stirring and mixing uniformly;
coating the glue in the step (IV) on the back of the TPU base film by using a coating machine, performing thermal curing at 100-120 ℃, and performing ultraviolet curing to obtain a UV curing repair glue layer;
sixthly, rolling the tail attaching protective film;
step seven, dissolving the modified resin in a solvent at room temperature to obtain a modified resin solution;
step eight, adding the solution obtained in the step seven into acrylic acid acrylic glue, and uniformly mixing;
dissolving an isocyanate curing agent in a solvent to obtain a curing agent solution;
step ten, adding the solution in the step (nine) into the acrylic acid acrylic glue in the step (eight), and fully and uniformly stirring;
step eleven, coating the acrylic glue water obtained in the step (ten) on the UV curing repair glue layer by using a coating machine, and obtaining the acrylic glue layer by coating the acrylic glue water on the UV curing repair glue layer at the linear speed of 10-30 m/min by using the coating machine, at the drying oven temperature of 80-120 ℃ and for the drying time of 2-5 min;
step twelve, rolling the machine tail laminated release film;
and thirteen, putting the rolled TPU protective film with the self-repairing surface into a curing chamber at 40 ℃ for curing for 48H, so that the acrylic adhesive layer is cured.
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| CN113668269A (en) * | 2021-09-08 | 2021-11-19 | 浙江伸美压克力股份有限公司 | Broken-edge paint dyed acrylic plate and processing technology thereof |
| CN114231200A (en) * | 2022-02-24 | 2022-03-25 | 宁波惠之星新材料科技有限公司 | Protective film and preparation method and using method thereof |
| CN114589416A (en) * | 2022-04-06 | 2022-06-07 | 深圳市立恒美电子科技有限公司 | High-precision laser cutting equipment for mobile phone film |
| CN115960545A (en) * | 2022-12-05 | 2023-04-14 | 苏州易昇光学材料股份有限公司 | High-yellowing-resistant-grade weather-resistant self-repairing GPU (graphic processing Unit) protective film |
| CN116656258A (en) * | 2023-06-07 | 2023-08-29 | 精一门(常州)光学薄膜有限公司 | Building external-adhered energy-saving film and preparation process thereof |
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| CN115960545A (en) * | 2022-12-05 | 2023-04-14 | 苏州易昇光学材料股份有限公司 | High-yellowing-resistant-grade weather-resistant self-repairing GPU (graphic processing Unit) protective film |
| CN115960545B (en) * | 2022-12-05 | 2023-09-05 | 苏州易昇光学材料股份有限公司 | High-yellowing-resistant weather-resistant self-repairing GPU protective film |
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