CN113322022B - UV light-shaped flexible protective film for 3D curved screen and preparation process - Google Patents
UV light-shaped flexible protective film for 3D curved screen and preparation process 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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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09J7/00—Adhesives in the form of films or foils
- C09J7/50—Adhesives in the form of films or foils characterised by a primer layer between the carrier and the adhesive
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- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
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- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
- C09J2301/162—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer the carrier being a laminate constituted by plastic layers only
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- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
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- C09J2433/00—Presence of (meth)acrylic polymer
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- C09J2433/00—Presence of (meth)acrylic polymer
- C09J2433/003—Presence of (meth)acrylic polymer in the primer coating
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- C09J2463/00—Presence of epoxy resin
- C09J2463/003—Presence of epoxy resin in the primer coating
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- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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- C09J2475/00—Presence of polyurethane
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- C09J2475/00—Presence of polyurethane
- C09J2475/003—Presence of polyurethane in the primer coating
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- C09J2483/00—Presence of polysiloxane
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- C09J2483/00—Presence of polysiloxane
- C09J2483/003—Presence of polysiloxane in the primer coating
Abstract
The invention relates to a UV light shaping flexible protective film for a 3D curved screen and a preparation process thereof, which sequentially comprise the following components from top to bottom: the adhesive comprises a PET base film layer (100), a modified low-viscosity pressure-sensitive adhesive layer (200), a hardened PET base material layer (300), a UV light fixing type adhesive layer (500), a flexible elastomer layer (600), a modified high-viscosity pressure-sensitive adhesive layer (700) and a release film layer (800). The protective film laminated structure is different from the existing market products, the flexible elastomer layer is added between the functional layer and the adhesive layer, and the flexible elastomer layer can well protect a screen and improve the functions of falling prevention, explosion prevention and screen cracking prevention.
Description
Technical Field
The invention relates to the field of mobile phone protective films, in particular to a UV light shaping flexible protective film for a 3D curved screen and a preparation process thereof.
Background
Along with the popularization of electronic devices with curved surface design on the arc edge of a smart phone screen and the development of flexible screen terminal equipment, a protective film is required to have a good protection function on the screen, and the 3D hot bending surface mobile phone protective film is produced. The existing 3D curved surface protective film mainly has three structural schemes of a hot bending PET protective film, a TPU pressure sensitive adhesive protective film and a hot bending toughened glass protective film, but each scheme product has certain defects in the application process.
The hard PET protective film is stuck on the edge of the curved screen, and phenomena such as reverse warping and white edges easily occur, so that the use effect is influenced, and the service life is short. The soft TPU has excellent flexibility and good impact resistance, can effectively prevent the screen from being cracked, but has the defects of poor processing and shaping effects, serious hot bending rebound and the like caused by the thermoplastic material characteristics of the soft TPU, and cannot be well applied to the 3D curved screen. The hot bent toughened glass protective film is high in cost, the edge is easy to break, and due to the fact that glass is integrally rigid, the tolerance value existing in the hot bending process cannot be made up by a corresponding adhesive layer, the middle of a product can have no adhesive phenomenon, and the attaching appearance is affected.
Disclosure of Invention
In view of the above, there is a need for a UV light-setting flexible protective film that can improve a 3D curved panel that is resistant to falling, explosion, and cracking.
For solving above-mentioned technical problem, provide a UV light design flexible protection film for 3D curved surface screen, top-down includes in proper order: the adhesive comprises a PET base film layer, a modified low-viscosity pressure-sensitive adhesive layer, a hardened PET base material layer, a UV light fixing adhesive layer, a flexible elastomer layer, a modified high-viscosity pressure-sensitive adhesive layer and a release film layer;
the modified low-viscosity pressure-sensitive adhesive layer is bonded with the hardened PET substrate layer, and one side of the hardened PET substrate layer, which is far away from the modified low-viscosity pressure-sensitive adhesive layer, is bonded with the UV light fixing adhesive layer; UV photocuring design layer deviates from one side of sclerosis PET substrate layer with flexible elastomer layer bonds, flexible elastomer layer deviates from UV photocuring glue film one side is passed through modified high viscosity pressure sensitive adhesive layer with from the bonding of type rete and connect, wherein, flexible elastomer layer is the flexible elastomer of PU.
In the UV light-shaped flexible protective film for the 3D curved screen, the PET base film layer is an optical-grade PET film, and the thickness of the PET base film layer is 25-100um.
In the UV light-shaped flexible protective film for the 3D curved screen, the thickness of the modified low-viscosity pressure-sensitive adhesive layer is 5-15 mu m, and the modified low-viscosity pressure-sensitive adhesive layer is one of a low-viscosity PU adhesive process protective film, a low-viscosity silica gel process protective film or a low-viscosity acrylic process protective film.
In the UV light shaping flexible protective film for the 3D curved screen, the hardened PET substrate layer comprises a hardened PET base film and a coating, the thickness of the hardened PET substrate layer is 12-100um, the thickness of the hardened PET base film is 12-100um, and the thickness of the coating is 0.1-10um.
In the UV light-setting flexible protective film for a 3D curved screen according to the present invention, the hardened PET base film includes a modified acrylate hardened layer, and the modified acrylate hardened layer includes at least one of a polyurethane modified acrylic resin layer, an epoxy modified acrylic resin layer, an organic silicon modified acrylic resin layer, and an organic fluorine modified acrylic resin layer.
In the above UV light-setting flexible protective film for a 3D curved screen according to the present invention, the thickness of the UV light-setting adhesive layer is 25-100um, the UV light-setting adhesive layer (500) is a thermo-photo-setting dual-curing insulating coating solution, and the thermo-photo-setting dual-curing insulating coating solution includes: 10-50% of acrylate oligomer, 1-10% of epoxy resin polymer, 1-20% of polyurethane polymer, 30-80% of reactive diluent, 0.1-5% of photoinitiator, 0.5-5% of photoreactive agent, 0.1-5% of thermal initiator, 0.5-5% of thermal curing agent and 0.1-5% of functional additive A.
In the UV light-setting flexible protective film for the 3D curved screen, the thickness of the flexible elastomer layer is 10-100 microns, the elastomer layer is made of one of elastomers such as modified polyurethane, modified organic silicon, epoxy resin and polyacrylate, the elastomer layer is formed by solidifying coating liquid, and a functional auxiliary agent B is added into the coating liquid and can perform a crosslinking reaction with the functional auxiliary agent A contained in the UV light-setting adhesive layer in a UV illumination environment.
In the UV light-setting flexible protective film for the 3D curved screen, the thickness of the high-viscosity pressure-sensitive adhesive layer is 10-50um, and the pressure-sensitive adhesive in the high-viscosity pressure-sensitive adhesive layer is one of modified organic silicon, modified polyacrylate and modified polyurethane.
In the above UV light-setting flexible protective film for a 3D curved screen of the present invention, the thickness of the release film layer is 25-100um, and the release film layer is made by:
1) Coating an ultrathin coating on one surface of a PET (polyethylene terephthalate) base film layer, and then bonding a modified low-viscosity pressure-sensitive adhesive layer;
2) And stripping the modified low-viscosity pressure-sensitive adhesive layer after solidification and molding.
The preparation process of the protective film is characterized by comprising the following steps of:
the method comprises the following steps: coating a hardened PET base film to form a hardened PET base film layer (300), and attaching the hardened PET base film layer (300) to a low-viscosity modified pressure-sensitive adhesive film layer (200);
step two: coating a soft elastomer on the release film, and sticking a low-viscosity adhesive protective film when the release film is wound;
step three: coating the high-viscosity modified pressure-sensitive adhesive, tearing off the release film of the flexible elastomer film in the step two, coating the high-viscosity modified pressure-sensitive adhesive layer (700), attaching the release film layer (800) and rolling;
step four: coating a UV light setting layer, coating UV setting glue on the hardened PET non-hardened surface, thermally curing in an overheating oven, and adhering one surface of the bottom adhesive tape glue protective film in the third step when winding;
step five: the whole roll is made of standard rolls, standard square films are punched and bonded, and UV illumination setting is carried out.
Above-mentioned illumination design 3D screen protection film after laminating, top-down include facial mask layer, use layer and basement membrane layer in proper order, use layer top-down to include sclerosis layer, PET base film, UV in proper order and stereotype layer, flexible elastomer layer, viscose layer. The protective film laminated structure is different from the existing market products, the flexible elastic body layer is added between the functional layer and the adhesive layer, and the flexible elastic body layer can well protect the screen and provide the function of a falling anti-burst screen.
The invention relates to the structural design of UV setting adhesive and flexible elastomer, functional AB bi-component functional auxiliary agents are filled in the UV setting adhesive, in the UV illumination reaction process, the two layers migrate to the surface between the layers and generate chemical crosslinking reaction, the adhesive force and the bonding strength between the layers are improved, and the defect and the risk of layering of the UV setting protective film in the current market after UV illumination are overcome.
According to the flexible protective film disclosed by the invention, the flexible protective film is good in softness and adhesiveness before UV (ultraviolet) illumination curing, no white edge is generated, no warping exists, the whole protective film becomes hard after UV illumination setting, and the scratch-resistant and nail-resistant effects are good.
In the current market, a 3D screen protective film is generally subjected to a hot bending shaping and then laminating process, and the hot bending process can cause the problems of deformation, warpage, cambered surface rebounding and the like of the protective film, so that the product straight-through rate is low, the reject ratio is high, and the material waste is serious.
Drawings
Fig. 1 is a structural view of a UV light-setting flexible protective film for a 3D curved screen according to the present invention.
100 parts of a PET base film layer; 200. a low viscosity modified pressure sensitive adhesive layer; 300. hardening the PET base film layer; 400. a PET substrate layer; 500. UV light irradiation shaping layer; 600. a flexible elastomeric layer; 700. a high-viscosity modified pressure-sensitive adhesive layer; 800. and a release film layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following describes in detail the UV light-setting flexible protective film for 3D curved panel and the preparation process thereof with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Referring to fig. 1, a UV light-setting flexible protective film for a 3D curved screen according to an embodiment of the present invention includes, from top to bottom: the adhesive comprises a PET base film layer 100, a modified low-viscosity pressure-sensitive adhesive layer 200, a hardened PET base material layer 300, a UV light-fixing adhesive layer 500, a flexible elastomer layer 600, a modified high-viscosity pressure-sensitive adhesive layer 700 and a release film layer 800;
the modified low-viscosity pressure-sensitive adhesive layer 200 is bonded with the hardened PET substrate layer 300, and one side of the hardened PET substrate layer 300, which is far away from the modified low-viscosity pressure-sensitive adhesive layer 200, is bonded with the UV light fixing adhesive layer 500; one side that UV photocuring design layer 500 deviates from sclerosis PET substrate layer 300 bonds with flexible elastomer layer 600, and flexible elastomer layer 600 deviates from UV photocuring design glue film 500 one side through modified high viscosity pressure sensitive adhesive layer 700 with from type rete 800 bonding connection, and wherein, flexible elastomer layer is the flexible elastomer of PU.
The PET base film layer 100 of the present invention may be an optical grade PET film with a thickness of 25-100um.
The thickness of the modified low-viscosity pressure-sensitive adhesive layer 200 is 5-15um, the modified low-viscosity pressure-sensitive adhesive layer 200 is one of a low-viscosity PU adhesive process protective film, a low-viscosity silica gel process protective film or a low-viscosity acrylic process protective film, and is preferably Cheng Mo made of the low-viscosity PU adhesive, the viscosity of the low-viscosity process film is preferably 1-8gf, and the film tearing force attached to the surface of a hardening layer is preferably 1-5gf.
In the invention, the hardened PET base material layer 300 comprises a hardened PET base film and a coating, the thickness of the hardened PET base material layer 300 is 12-100um, the total thickness of the hardened PET base material layer is preferably 12-50um, the hardened coating is coated on one side of the PET base film, and the hardened coating can meet the performance requirements of surface wear resistance, scratch resistance, fingerprint resistance and the like;
wherein, the thickness of the hardened PET basal membrane is 12-100um, and the optimal thickness is 12-50um;
the thickness of the coating is 0.1-10um, preferably 2-3um;
the hardened PET base film comprises a modified acrylate hardened layer, and the modified acrylate hardened layer comprises at least one of a polyurethane modified acrylic resin layer, an epoxy modified acrylic resin layer, an organic silicon modified acrylic resin layer and an organic fluorine modified acrylic resin layer.
In the invention, the thickness of the UV light-shaped adhesive layer 500 is 25-100um, the UV light-shaped adhesive layer 500 is a thermo-photo-curing dual-curing insulating coating solution, and the UV light-shaped adhesive layer is subjected to film forming through coating, drying and thermo-curing processes; the thermo-optical double-solid insulating coating solution comprises the following components: 10-50% of acrylate oligomer, 1-10% of epoxy resin polymer, 1-20% of polyurethane polymer, 30-80% of reactive diluent, 0.1-5% of photoinitiator, 0.5-5% of photoreactive agent, 0.1-5% of thermal initiator, 0.5-5% of thermal curing agent and 0.1-5% of functional additive A.
In the present invention, the flexible elastomer layer 600 has a thickness of 10-100um, preferably 20-50um; the material of the elastomer layer 600 is one of elastomers such as modified polyurethane, modified silicone, epoxy resin, polyacrylate, etc., the elastomer layer 600 is formed by solidifying a coating liquid, and a functional additive B is added into the coating liquid and can perform a cross-linking reaction with a functional additive a included in the UV light setting adhesive layer 600 in a UV light environment.
In the present invention, the thickness of the high-viscosity pressure-sensitive adhesive layer 700 is 10 to 50um, preferably 15 to 30um; the pressure-sensitive adhesive in the high-viscosity pressure-sensitive adhesive layer 700 is one of modified organic silicon, modified polyacrylate and modified polyurethane.
The thickness of the release film layer 800 is 25-100um, and the preferable thickness is 25-50um;
wherein, the release film layer is prepared as follows:
firstly, coating an ultrathin coating on one surface of a PET (polyethylene terephthalate) base film layer, and then bonding a modified low-viscosity pressure-sensitive adhesive layer;
and then stripping the solidified and molded release film layer from the modified low-viscosity pressure-sensitive adhesive layer.
The invention provides a hot bending-free and illumination-formed 3D screen protection film after being laminated, which sequentially comprises a surface film layer, a use layer and a bottom film layer from top to bottom, wherein the use layer sequentially comprises a hardening layer, a PET base film, a UV forming layer, a flexible elastomer layer and an adhesive layer from top to bottom. The protective film laminated structure is different from the existing market products, the flexible elastic body layer is added between the functional layer and the adhesive layer, and the flexible elastic body layer can well protect the screen and provide the function of a falling anti-burst screen.
The invention also comprises a preparation process of the protective film, which comprises the following steps:
the method comprises the following steps: coating a hardened PET base film to form a hardened PET base film layer (300), and attaching the hardened PET base film layer (300) to a low-viscosity modified pressure-sensitive adhesive film layer (200);
step two: coating a soft elastomer on the release film, and sticking a low-adhesive-tape protective film when the release film is wound;
step three: coating the high-viscosity modified pressure-sensitive adhesive, tearing off the release film of the flexible elastomer film in the step two, coating the high-viscosity modified pressure-sensitive adhesive layer (700), attaching the release film layer (800) and rolling;
step four: coating a UV light setting layer, coating UV setting glue on the hardened PET non-hardened surface, thermally curing in an overheating oven, and adhering one surface of the bottom adhesive tape glue protective film in the third step when winding;
step five: the whole roll is made of standard rolls, standard square films are punched and bonded, and UV illumination setting is carried out.
The method specifically comprises the following steps:
step one, coating and hardening a PET base film: coating a hardening layer on the surface of the PET base film, attaching a PET low-viscosity pressure-sensitive adhesive protective film on the surface, and rolling;
coating a flexible elastomer base film, wherein an elastomer solution comprises 30 parts by weight of TPU elastic colloidal particles (hardness 88A), 4.5 parts by weight of a chain extender, 10 parts by weight of an isocyanate curing agent, 0.5 part by weight of a flatting agent, 0.5 part by weight of a functional assistant B, 40 parts by weight of butanone, 30 parts by weight of ethyl acetate and 5 parts by weight of cyclohexanone; the solid content of the flexible elastomer solution is 33.5%, the viscosity is 850cps, the linear speed is 6m/min when the slit is coated, the speed of a glue supply pump is 15rpm, the flexible elastomer solution is dried and cured by an oven, the temperature is set to be 50 ℃ in the first section, 80 ℃ in the second section, 120 ℃ in the third section, 130 ℃ in the fourth section, 130 ℃ in the fifth section and 80 ℃ in the sixth section, so that a double-layer film structure of the flexible elastomer film 600 with the thickness of 50 microns and the release film is obtained, after the flexible elastomer film 220 with the double-layer film structure is taken out of the oven, the flexible elastomer film 220 with the double-layer film structure is attached to a low-viscosity pressure-sensitive adhesive protective film at an attaching roller, and the flexible elastomer semi-finished product is obtained by winding.
Step three, coating the high-viscosity modified pressure-sensitive adhesive: and (3) coating a high-viscosity modified pressure-sensitive adhesive on the release film surface of the flexible elastomer film in the unreeling position in the second working procedure, wherein the solid content of the solution of the pressure-sensitive adhesive is 30%, the viscosity is 800cps, slot die or COMMA is selected as coating equipment, the drying temperature is 80-130 ℃, the drying time is 2-10min, the pressure-sensitive adhesive is desolventized, the thickness of the flexible elastomer layer is 70 mu m, the thickness of the pressure-sensitive adhesive layer is 20 mu m, the release film is attached to the pressure-sensitive adhesive surface, and the pressure-sensitive adhesive is rolled.
Step four, coating a UV light setting layer: in the first step, UV setting glue is coated on the exposed surface of the hardened PET base film, the solid content of the coating liquid of the UV setting glue is 45%, the viscosity is 600cps, the linear speed of the coating machine is 8m/min, the glue supply pump speed is 12rpm, the coating liquid is dried and thermally cured by an oven, the temperature is set to be 40 ℃ in the first section, 70 ℃ in the second section, 100 ℃ in the third section, 120 ℃ in the fourth section, 120 ℃ in the fifth section, 80 ℃ in the sixth section, the dry glue thickness of the UV light setting glue layer is 55um, and the flexible elastomer surface is coated and wound in the coating surface fitting step three.
And fifthly, dividing the cut into strips with the width specified by a customer by a splitting machine, die-cutting the strips into standard sheets, attaching the standard sheets to a 3D curved screen mobile phone, and forming the sheets through UV illumination, wherein a UV light source is a 365nm high-pressure mercury lamp or an LED lamp, the energy of the UV lamp is 600-1000mJ/cm & lt 2 & gt, the irradiation time is 18-25s, and the accumulated energy is 10000-12000mJ.
In the preparation process, the UV setting adhesive and the flexible elastomer are structurally designed, the functional AB bi-component functional auxiliary agent is filled in the UV setting adhesive, the two layers migrate to the surface between the layers in the UV illumination reaction process and undergo chemical crosslinking reaction, the adhesion force and the bonding strength between the layers are improved, and the defect and the risk of layering of the UV setting protective film in the current market after UV illumination are overcome.
In the fourth aspect of the invention, the flexible protective film has good flexibility and adhesiveness before UV illumination curing, no white edge and no warping, and after UV illumination setting, the whole protective film becomes hard, and the scratch-resistant and nail-resistant effects are good.
In the fifth aspect, for 3D screen protective films in the market at present, a hot bending and shaping process is generally adopted, and then a laminating process is carried out, the hot bending process can cause the problems of deformation, warping, arc surface rebounding and the like of the protective film, so that the product straight-through rate is low, the reject ratio is high, and the material waste is serious.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides a flexible protection film of UV light design for 3D curved surface screen which characterized in that: from top to bottom include in proper order: the adhesive comprises a PET base film layer (100), a modified low-viscosity pressure-sensitive adhesive layer (200), a hardened PET base film layer (300), a UV light fixing type adhesive layer (500), a flexible elastomer layer (600), a modified high-viscosity pressure-sensitive adhesive layer (700) and a release film layer (800);
the modified low-viscosity pressure-sensitive adhesive layer (200) is bonded with the hardened PET substrate layer (300), and one side of the hardened PET substrate layer (300) departing from the modified low-viscosity pressure-sensitive adhesive layer (200) is bonded with the UV light fixing adhesive layer (500); one side of the UV light fixing type adhesive layer (500) departing from the hardened PET substrate layer (300) is bonded with the flexible elastomer layer (600), one side of the flexible elastomer layer (600) departing from the UV light fixing type adhesive layer (500) is bonded and connected with the release film layer (800) through the modified high-viscosity pressure-sensitive adhesive layer (700), and the flexible elastomer layer is a PU flexible elastomer;
the thickness of the flexible elastomer layer (600) is 10-100um, the flexible elastomer layer (600) is formed by solidifying coating liquid, a functional auxiliary agent B is added into the coating liquid, and the functional auxiliary agent B and a functional auxiliary agent A included in the UV light fixing type glue layer (500) can generate a cross-linking reaction in a UV illumination environment;
UV light fixed type glue film (500) thickness is 25-100um, UV light fixed type glue film (500) are two solid insulating coating solutions of thermophoto, two solid insulating coating solution of thermophoto constitute and include: 10-50% of acrylate oligomer, 1-10% of epoxy resin polymer, 1-20% of polyurethane polymer, 30-80% of reactive diluent, 0.1-5% of photoinitiator, 0.5-5% of photoreactive agent, 0.1-5% of thermal initiator, 0.5-5% of thermal curing agent and 0.1-5% of functional additive A.
2. The UV light-setting flexible protective film for a 3D curved screen according to claim 1, wherein: the PET base film layer (100) is an optical PET film, and the thickness of the PET base film layer is 25-100um.
3. The UV light-setting flexible protective film for a 3D curved screen according to claim 1, wherein: the thickness of the modified low-viscosity pressure-sensitive adhesive layer (200) is 5-15um, and the modified low-viscosity pressure-sensitive adhesive layer (200) is one of a low-viscosity PU adhesive process protective film, a low-viscosity silica gel process protective film or a low-viscosity acrylic process protective film.
4. The UV light-setting flexible protective film for a 3D curved screen according to claim 1, wherein: sclerosis PET substrate layer (300) is including sclerosis PET base film and coating, sclerosis PET substrate layer (300) thickness is 12-100um, and wherein sclerosis PET base film thickness is 12-100um, and the coating thickness is 0.1-10um.
5. The UV light-setting flexible protective film for a 3D curved screen according to claim 4, wherein: the sclerosis PET base film includes modified acrylic ester sclerosis layer, modified acrylic ester sclerosis layer includes in the modified acrylic resin layer of polyurethane, the modified acrylic resin layer of epoxy, the modified acrylic resin layer of organosilicon, the modified acrylic resin layer of organic fluorine at least one.
6. The UV light-setting flexible protective film for a 3D curved screen according to claim 1, wherein: the thickness of the modified high-viscosity pressure-sensitive adhesive layer (700) is 10-50um, and the pressure-sensitive adhesive in the modified high-viscosity pressure-sensitive adhesive layer (700) is one of modified organic silicon, modified polyacrylate and modified polyurethane.
7. The UV light-setting flexible protective film for a 3D curved screen according to claim 1, wherein: the thickness of the release film layer (800) is 25-100um, and the preparation method of the release film layer comprises the following steps:
1) Coating an ultrathin coating on one surface of a PET (polyethylene terephthalate) base film layer, and then bonding a modified low-viscosity pressure-sensitive adhesive layer;
2) And stripping the modified low-viscosity pressure-sensitive adhesive layer after solidification and molding.
8. A process for preparing a UV light-setting flexible protective film for a 3D curved screen according to claim 1, wherein the process comprises the steps of: the method comprises the following steps: coating a hardened PET base film to form a hardened PET base material layer (300), and attaching the hardened PET base material layer to the modified low-viscosity pressure-sensitive adhesive layer (200); step two: coating a soft elastomer on the release film, and sticking a low-adhesive-tape protective film when the release film is wound; step three: tearing off the release film of the flexible elastomer layer in the second step, coating the modified high-viscosity pressure-sensitive adhesive layer (700), attaching the release film layer (800) and rolling; step four: coating UV light-curing glue on the non-cured surface of the cured PET substrate layer, thermally curing the cured PET substrate layer in an overheating oven, and adhering one surface of the bottom adhesive tape glue protective film in the third step in the rolling process; step five: punching a standard square film, laminating, and performing UV illumination setting.
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| CN114574118B (en) * | 2022-02-26 | 2023-04-28 | 浙江世窗光学薄膜制造有限公司 | Polyurethane multilayer film and preparation method thereof |
| CN114479707B (en) * | 2022-02-26 | 2023-03-14 | 浙江世窗光学薄膜制造有限公司 | Polyurethane multilayer film and preparation method thereof |
| CN115058212A (en) * | 2022-07-25 | 2022-09-16 | 惠州合益创光学材料有限公司 | UV (ultraviolet) post-cured curved screen protective film and preparation method thereof |
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| CN106574150B (en) * | 2014-09-18 | 2020-04-03 | 三菱化学株式会社 | Photocrosslinkable transparent adhesive material, transparent adhesive material laminate, and laminate for optical device formation |
| CN209890544U (en) * | 2019-01-31 | 2020-01-03 | 明尼苏达矿业制造特殊材料（上海）有限公司 | Protection film, screen assembly |
| CN110484156A (en) * | 2019-07-26 | 2019-11-22 | 新纶科技（常州）有限公司 | A kind of 3D curved surface mobile phone TPU silicone protective film and preparation method thereof |
| CN209940896U (en) * | 2019-12-03 | 2020-01-14 | 宁波惠之星新材料科技有限公司 | Protection sticker structure for non-hot-press molded mobile phone |
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