CN108192520A - A kind of 2.5D protective films and preparation method thereof - Google Patents
A kind of 2.5D protective films and preparation method thereof Download PDFInfo
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- CN108192520A CN108192520A CN201711400390.1A CN201711400390A CN108192520A CN 108192520 A CN108192520 A CN 108192520A CN 201711400390 A CN201711400390 A CN 201711400390A CN 108192520 A CN108192520 A CN 108192520A
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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
- C09J183/00—Adhesives 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
- C09J183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer 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
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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
- 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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- 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
- 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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- 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
Abstract
The present invention provides a kind of 2.5D protective films and preparation method thereof.The 2.5D protective films are multilayered structure, have PET base material layer, the first silicone pressure sensitive compound protective layer, polyacrylic resin hardened layer, the first special optical level PET substrate layer, OCA optics polyacrylic acid glue-line, the second special optical level PET substrate layer, the second silicone pressure sensitive compound protective layer and the PET fluorine element release film layers being bonded successively.The 2.5D protective films of the present invention have light transmittance high, and mist degree is low；Thermo-formability is good, solves the problems, such as that PC faces do not generate corner easily after solvent resistant, poor adhesive force, fitting Mobile phone screen and warp grey side；Hardened layer has high abrasion, high rigidity, AF anti-fingerprint, the smooth senses of AG；The advantages of silicone pressure sensitive adhesivity is moderate, energy secure fit mobile phone glass cover board, venting quality is excellent；It realizes ease for use and high performance perfect adaptation.
Description
Technical field
The present invention relates to a kind of 2.5D protective films and preparation method thereof, belong to safeguard film for cellular phone technical field.
Background technology
With popularizing for curve screens, more and more mobile phones employ the glass display screen with 2.5D curved surfaces.Market
Upper existing safeguard film for cellular phone is also required to that 2.5D shapes are presented to adapt to the 2.5D of present mobile phone songs after having thermocompression forming
The glass display screen protection in face.And existing PET protection film thermo-formability is poor, easily rebounds after hot pressing, after being bonded Mobile phone screen
Easily corner is led to the problem of to warp grey side.
Invention content
In view of the problems of the above-mentioned prior art, the object of the present invention is to provide a kind of 2.5D protective films and its preparation sides
Method selects to be more suitable for hot-forming soft PET as form substrate, is hot pressed into so as to solve existing PET protection film
Type is poor, easily rebounds after hot pressing, is bonded after Mobile phone screen and easily leads to the problem of corner and warp grey side
The purpose of the present invention is achieved by the following technical programs：
A kind of 2.5D protective films, are multilayered structure, have PET base material layer, the first silicone pressure sensitive compound protective layer, poly- third
Olefin(e) acid hardening of resin layer, the first special optical level PET substrate layer, OCA optics polyacrylic acid glue-line, the second special optical level PET
Substrate layer and the second silicone pressure sensitive compound protective layer.
In above-mentioned 2.5D protective films, it is preferred that the PET base material layer, the first silicone pressure sensitive compound protective layer, institute
State polyacrylic resin hardened layer, the first special optical level PET substrate layer, the OCA optics polyacrylic acid glue-line, described
Second special optical level PET substrate layer and the second silicone pressure sensitive compound protective layer are bonded successively.
In above-mentioned 2.5D protective films, it is preferred that the thickness of the PET base material layer is 25-100 μm,
The thickness of the first silicone pressure sensitive compound protective layer is 5-15 μm,
The thickness of the polyacrylic resin hardened layer is 2-6 μm,
The thickness of the first special optical PET base material layer is 25-125 μm,
The thickness of the OCA optics polyacrylic acid glue-line is 5-30 μm,
The thickness of the second special optical PET base material layer is 25-125 μm,
The thickness of the second silicone pressure sensitive compound protective layer is 10-50 μm.
In above-mentioned 2.5D protective films, it is preferred that the 2.5D protective films further include PET fluorine element release film layers, the PET
Fluorine element release film layer fits with the pressure-sensitive compound protective layer of machine silicon, and positioned at the outermost layer of the 2.5D protective films.
In above-mentioned 2.5D protective films, it is preferred that the thickness of the PET fluorine elements release film layer is 25-100 μm.
In above-mentioned 2.5D protective films, it is preferred that in terms of mass percentage, the first silicone pressure sensitive compound protective layer
Include with the raw material composition of the second silicone pressure sensitive compound protective layer：
Solvent 50%-80%, silicon raw rubber 5%-20%, silicones 5%-20%, crosslinking agent 0.5%-1%, attachment are made every effort to promote
Into agent 0.5%-1% and catalyst 0.5%-1.5%, summation 100%.
In above-mentioned 2.5D protective films, it is preferred that the solvent includes ethyl acetate, n-butyl acetate, toluene, PMA, fourth
The combination of one or more of ketone, IPA and ethyl alcohol.
In above-mentioned 2.5D protective films, it is preferred that the dimethyl silicone polymer of the silicon raw rubber including ethenyl blocking and/
Or the polydimethyl phenyl siloxane of ethenyl blocking.
In above-mentioned 2.5D protective films, it is preferred that the silicones includes MQ silicones, but not limited to this.
In above-mentioned 2.5D protective films, it is preferred that the crosslinking agent includes containing hydrogen silicone oil, but not limited to this.
In above-mentioned 2.5D protective films, it is preferred that the adhesion promoter includes having for common compound carboxy blocking
The hydroxy-end capped organosiloxane of organic siloxane and/or routine.
In above-mentioned 2.5D protective films, it is preferred that the catalyst is platinum catalyst, but not limited to this.
In above-mentioned 2.5D protective films, polyacrylic resin hardened layer is anti-fingerprint polyacrylic resin hardened layer, can
To select conventional anti-fingerprint polyacrylic resin hardening bath；Preferably, the raw material of the polyacrylic resin hardened layer is (also referred to as poly-
Acrylic resin hardening bath) composition include：
The photoinitiator of the solvent of 40-80 parts by weight, the resin of 20-60 parts by weight and 0.3-1 parts by weight；
The resin includes that polyurethane is acrylic resin modified and/or Organic fluoride modified polypropene acid resin；
The photoinitiator includes 2- hydroxy-2-methyl -1- phenylacetones and/or 1- hydroxycyclohexyl phenyl ketones；
The solvent includes the combination of one or more of ethyl acetate, n-butyl acetate, toluene, MIBK and PGM.
In above-mentioned 2.5D protective films, it is preferred that the first special optical PET base material layer and the second special optical PET
Substrate layer is prepared by the three-layer co-extruded technique of A/B/C three-decker die heads；Wherein, A/C die heads squeeze out modified high hard
Degree, high heat-resisting PET film (are improved PET hardness, heat-resisting conventional organic filler and/or inorganic particulate using blending method addition
PET film), B die heads squeeze out modified low Tg polyester and (are improved PET hardness, the organic grain of heat-resisting routine using blending method addition
The low Tg polyester of son and/or inorganic particulate).
In above-mentioned 2.5D protective films, the PET base material layer is general industry level PET base material.
The present invention also provides the preparation methods of above-mentioned 2.5D protective films, include the following steps：
It is hot-forming at 100 DEG C -120 DEG C by the three-layer co-extruded technique of A/B/C three-decker die heads, respectively obtain first
Special optical PET base material layer and the second special optical PET base material layer；
The second spy is coated on by Slot-die coating methods after the raw material of second silicone pressure sensitive compound protective layer is mixed
On one face of different optics PET base material layer, the second silicone pressure sensitive compound protective layer is obtained；
The raw material of polyacrylic resin hardened layer is coated on a face of the first special optical PET base material layer, is obtained
Polyacrylic resin hardened layer；
OCA optics polyacrylic acid is coated on the first special optical PET base material layer or the second special optical PET base material layer
On another face, OCA optics polyacrylic acid glue-lines are obtained；
OCA optics polyacrylic acid glue-lines and uncoated corresponding second special optical PET base material layer or first is special
Different optics PET base material layer fits；
The first silicone pressure sensitive is coated with by Slot-die coating methods in the non-binding face of polyacrylic resin hardened layer
The raw material of compound protective layer obtains the first silicone pressure sensitive glue-line；
The first silicone pressure sensitive glue-line non-binding face fitting PET base material layer to get to 2.5D protective films.
In above-mentioned preparation method, it is preferred that the preparation method is additionally included in not being bonded for the second silicone pressure sensitive glue-line
Face paste closes the step of PET fluorine element release film layers.
In above-mentioned preparation method, it is preferred that the preparation method be additionally included in obtain the first special optical PET base material layer and
The first special optical PET base material layer and the second special optical PET base material layer are carried out after second special optical PET base material layer
Double spread pre-processes the step of priming coat；The pretreatment priming coat is conventional polyurethanes or polyacrylate.
The present invention protrusion effect be：
1st, composite material light transmittance is high, and mist degree is low, improves visual experience；2nd, protective film thermo-formability is good, energy
It is effectively improved after fitting Mobile phone screen and easily leads to the problem of corner and warp grey side；3rd, hardened layer has high abrasion, high rigidity, and AF prevents
Fingerprint, the smooth senses of AG；4th, silicone pressure sensitive adhesivity is moderate, energy secure fit mobile phone glass cover board, and venting quality is excellent.
Description of the drawings
Fig. 1 is the structure diagram of the 2.5D protective films of embodiment 1.
Specific embodiment
In order to which technical characteristic, purpose and the advantageous effect to the present invention are more clearly understood, now to the skill of the present invention
Art scheme carry out it is described further below, but it is not intended that the present invention can practical range restriction.Institute in following embodiments
Experimental method is stated, is conventional method unless otherwise specified；The reagent and material, unless otherwise specified, can be from business way
Diameter obtains.
Embodiment 1
The present embodiment provides a kind of 2.5D protective films, as shown in Figure 1, it is multilayered structure, there is the PET bases being bonded successively
Material layer 1, the first silicone pressure sensitive compound protective layer 2, polyacrylic resin hardened layer 3, the first special optical level PET substrate layer 4,
OCA optics polyacrylic acid glue-line 5, the second special optical level PET substrate layer 6, the second silicone pressure sensitive compound protective layer 7 and PET fluorine
Plain release film layer 8.Wherein,
The thickness of the PET base material layer 1 is 50 μm,
The thickness of the first silicone pressure sensitive compound protective layer 2 is 10 μm,
The thickness of the polyacrylic resin hardened layer 3 is 3 μm,
The thickness of the first special optical PET base material layer 4 is 50 μm,
The thickness of the OCA optics polyacrylic acid glue-line 5 is 20 μm,
The thickness of the second special optical PET base material layer 6 is 50 μm,
The thickness of the second silicone pressure sensitive compound protective layer 7 is 27 μm,
8 degree of the thickness of the PET fluorine elements release film layer is 50 μm.
The raw material of the first silicone pressure sensitive compound protective layer 2 and the second silicone pressure sensitive compound protective layer 7 composition includes：
Solvent 56.5wt%, silicon raw rubber 20wt%, silicones 20wt%, crosslinking agent 1wt%, adhesion promoter 1wt%
With catalyst 1.5wt%.
The solvent is the combination of ethyl acetate, two kinds of toluene, can be arbitrary proportion, and the present embodiment selects volume ratio 1:
1；
The silicon raw rubber is the dimethyl silicone polymer of ethenyl blocking
The silicones is MQ silicones；The crosslinking agent is containing hydrogen silicone oil；The adhesion promoter is compound organic
Siloxanes；The catalyst is platinum catalyst.
The raw material composition of the polyacrylic resin hardened layer includes：
The solvent (MIBK) of 40 parts by weight, the resin (polyurethane is acrylic resin modified) of 20 parts by weight and 0.3 parts by weight
Photoinitiator (2- hydroxy-2-methyl -1- phenylacetones).
The first special optical PET base material layer 4 and the second special optical PET base material layer 6 are respectively by tri- layers of A/B/C
The three-layer co-extruded technique of structure die head is prepared；Wherein, A/C die heads are squeezed out with PBT (polybutylene terephthalate (PBT)), B
Die head, which squeezes out, linearly has the low Tg polyester of thermoplastic properties.
The present embodiment also provides the above-mentioned preparation method of 2.5D protective films stated, and includes the following steps：
It is hot-forming at 100 DEG C -120 DEG C by the three-layer co-extruded technique of A/B/C three-decker die heads, respectively obtain first
4 and second special optical PET base material layer 6 of special optical PET base material layer, and anilox roll coating by way of to first special light
It learns 4 and second special optical PET base material layer 6 of PET base material layer and carries out double spread pretreatment priming coat, the pretreatment priming coat
For polyacrylate, pretreatment, winding are completed；
The second spy is coated on by Slot-die coating methods after the raw material of second silicone pressure sensitive compound protective layer 7 is mixed
On one face of different optics PET base material layer 6, the second silicone pressure sensitive compound protective layer 7 is obtained；It then, will by being bonded rubber rollers
Fluorine element release film 8 is fitted on the second silicone pressure sensitive compound protective layer 7, winding；
Polyacrylic resin hardening bath is coated on the first special optical PET base material layer 4 by way of anilox roll coating
A face on, obtain polyacrylic resin hardened layer 3, wind；
OCA optics polyacrylic acid is coated on the first special optical PET base material layer 4 or the second special optical PET base material layer 6
Another face on, obtain OCA optics polyacrylic acid glue-line 5；
By doubling roller by OCA optics polyacrylic acid glue-line 5 and uncoated corresponding second special optical PET base material
6 or first special optical PET base material layer 4 of layer fits；
First silicone pressure sensitive is coated with by Slot-die coating methods in the non-binding face of polyacrylic resin hardened layer 5
The raw material of compound protective layer 2 obtains the first silicone pressure sensitive glue-line 2, winding；
The first silicone pressure sensitive glue-line 2 non-binding face fitting PET base material layer 1 to get to 2.5D protective films.
Embodiment 2
The present embodiment provides a kind of 2.5D protective films, as shown in Figure 1, it is multilayered structure, there is the PET bases being bonded successively
Material layer 1, the first silicone pressure sensitive compound protective layer 2, polyacrylic resin hardened layer 3, the first special optical level PET substrate layer 4,
OCA optics polyacrylic acid glue-line 5, the second special optical level PET substrate layer 6, the second silicone pressure sensitive compound protective layer 7 and PET fluorine
Plain release film layer 8.Wherein,
The thickness of the PET base material layer 1 is 50 μm,
The thickness of the first silicone pressure sensitive compound protective layer 2 is 10 μm,
The thickness of the polyacrylic resin hardened layer 3 is 2.5 μm,
The thickness of the first special optical PET base material layer 4 is 50 μm,
The thickness of the OCA optics polyacrylic acid glue-line 5 is 10 μm,
The thickness of the second special optical PET base material layer 6 is 50 μm,
The thickness of the second silicone pressure sensitive compound protective layer 7 is 20 μm,
8 degree of the thickness of the PET fluorine elements release film layer is 50 μm.
The raw material of the first silicone pressure sensitive compound protective layer 2 and the second silicone pressure sensitive compound protective layer 7 composition includes：
Solvent 88wt%, silicon raw rubber 5wt%, silicones 5wt%, crosslinking agent 0.5wt%, adhesion promoter 0.5wt%
With catalyst 1wt%.
The solvent is ethyl acetate, toluene, dimethylbenzene are according to volume ratio 1:1:1 combination；
The silicon raw rubber is the dimethyl silicone polymer of ethenyl blocking
The silicones is MQ silicones；The crosslinking agent is containing hydrogen silicone oil；The adhesion promoter is compound organic
Siloxanes；The catalyst is platinum catalyst.
The raw material composition of the polyacrylic resin hardened layer includes：
The solvent (n-butyl acetate) of 80 parts by weight, the resin (Organic fluoride modified polypropene acid resin) and 1 of 60 parts by weight
The photoinitiator (1- hydroxycyclohexyl phenyl ketones) of parts by weight.
The first special optical PET base material layer 4 and the second special optical PET base material layer 6 are respectively by tri- layers of A/B/C
The three-layer co-extruded technique of structure die head is prepared；Wherein, A/C die heads are squeezed out with PBT (polybutylene terephthalate (PBT)), B
Die head, which squeezes out, linearly has the low Tg polyester of thermoplastic properties.
The present embodiment also provides the above-mentioned preparation method of 2.5D protective films stated, and includes the following steps：
It is hot-forming at 100 DEG C -120 DEG C by the three-layer co-extruded technique of A/B/C three-decker die heads, respectively obtain first
4 and second special optical PET base material layer 6 of special optical PET base material layer, and anilox roll coating by way of to first special light
It learns 4 and second special optical PET base material layer 6 of PET base material layer and carries out double spread pretreatment priming coat, the pretreatment priming coat
For polyacrylate, pretreatment, winding are completed；
The second spy is coated on by Slot-die coating methods after the raw material of second silicone pressure sensitive compound protective layer 7 is mixed
On one face of different optics PET base material layer 6, the second silicone pressure sensitive compound protective layer 7 is obtained；It then, will by being bonded rubber rollers
Fluorine element release film 8 is fitted on the second silicone pressure sensitive compound protective layer 7, winding；
Polyacrylic resin hardening bath is coated on the first special optical PET base material layer 4 by way of anilox roll coating
A face on, obtain polyacrylic resin hardened layer 3, wind；
OCA optics polyacrylic acid is coated on the first special optical PET base material layer 4 or the second special optical PET base material layer 6
Another face on, obtain OCA optics polyacrylic acid glue-line 5；
By doubling roller by OCA optics polyacrylic acid glue-line 5 and uncoated corresponding second special optical PET base material
6 or first special optical PET base material layer 4 of layer fits；
First silicone pressure sensitive is coated with by Slot-die coating methods in the non-binding face of polyacrylic resin hardened layer 5
The raw material of compound protective layer 2 obtains the first silicone pressure sensitive glue-line 2, winding；
The first silicone pressure sensitive glue-line 2 non-binding face fitting PET base material layer 1 to get to 2.5D protective films.
Embodiment 3
The present embodiment provides a kind of 2.5D protective films, as shown in Figure 1, it is multilayered structure, there is the PET bases being bonded successively
Material layer 1, the first silicone pressure sensitive compound protective layer 2, polyacrylic resin hardened layer 3, the first special optical level PET substrate layer 4,
OCA optics polyacrylic acid glue-line 5, the second special optical level PET substrate layer 6, the second silicone pressure sensitive compound protective layer 7 and PET fluorine
Plain release film layer 8.Wherein,
The thickness of the PET base material layer 1 is 50 μm,
The thickness of the first silicone pressure sensitive compound protective layer 2 is 10 μm,
The thickness of the polyacrylic resin hardened layer 3 is 3 μm,
The thickness of the first special optical PET base material layer 4 is 50 μm,
The thickness of the OCA optics polyacrylic acid glue-line 5 is 20 μm,
The thickness of the second special optical PET base material layer 6 is 75 μm,
The thickness of the second silicone pressure sensitive compound protective layer 7 is 30 μm,
8 degree of the thickness of the PET fluorine elements release film layer is 75 μm.
The raw material of the first silicone pressure sensitive compound protective layer 2 and the second silicone pressure sensitive compound protective layer 7 composition includes：
Solvent 65wt%, silicon raw rubber 15wt%, silicones 17.5wt%, crosslinking agent 0.8wt%, adhesion promoter
0.8wt% and catalyst 0.9wt%.
The solvent is ethyl acetate, n-butyl acetate, toluene are according to volume ratio 1：1：1 combination；
The silicon raw rubber is the dimethyl silicone polymer of ethenyl blocking and the polydimethyl phenyl silica of ethenyl blocking
Alkane mixed in equal amounts；
The silicones is MQ silicones；The crosslinking agent is containing hydrogen silicone oil；The adhesion promoter is compound organic
Siloxanes；The catalyst is platinum catalyst.
The raw material composition of the polyacrylic resin hardened layer includes：
The solvent (PGM) of 50 parts by weight, the resin (polyurethane is acrylic resin modified) of 40 parts by weight and 0.7 parts by weight
Photoinitiator (2- hydroxy-2-methyl -1- phenylacetones).
The first special optical PET base material layer 4 and the second special optical PET base material layer 6 are respectively by tri- layers of A/B/C
The three-layer co-extruded technique of structure die head is prepared；Wherein, A/C die heads are squeezed out with PBT (polybutylene terephthalate (PBT)), B
Die head, which squeezes out, linearly has the low Tg polyester of thermoplastic properties.
The present embodiment also provides the above-mentioned preparation method of 2.5D protective films stated, and includes the following steps：
It is hot-forming at 100 DEG C -120 DEG C by the three-layer co-extruded technique of A/B/C three-decker die heads, respectively obtain first
4 and second special optical PET base material layer 6 of special optical PET base material layer, and anilox roll coating by way of to first special light
It learns 4 and second special optical PET base material layer 6 of PET base material layer and carries out double spread pretreatment priming coat, the pretreatment priming coat
For polyurethane, pretreatment, winding are completed；
The second spy is coated on by Slot-die coating methods after the raw material of second silicone pressure sensitive compound protective layer 7 is mixed
On one face of different optics PET base material layer 6, the second silicone pressure sensitive compound protective layer 7 is obtained；It then, will by being bonded rubber rollers
Fluorine element release film 8 is fitted on the second silicone pressure sensitive compound protective layer 7, winding；
Polyacrylic resin hardening bath is coated on the first special optical PET base material layer 4 by way of anilox roll coating
A face on, obtain polyacrylic resin hardened layer 3, wind；
OCA optics polyacrylic acid is coated on the first special optical PET base material layer 4 or the second special optical PET base material layer 6
Another face on, obtain OCA optics polyacrylic acid glue-line 5；
By doubling roller by OCA optics polyacrylic acid glue-line 5 and uncoated corresponding second special optical PET base material
6 or first special optical PET base material layer 4 of layer fits；
First silicone pressure sensitive is coated with by Slot-die coating methods in the non-binding face of polyacrylic resin hardened layer 5
The raw material of compound protective layer 2 obtains the first silicone pressure sensitive glue-line 2, winding；
The first silicone pressure sensitive glue-line 2 non-binding face fitting PET base material layer 1 to get to 2.5D protective films.
Embodiment 4
The present embodiment carries out performance pair with the 2.5D protective films that embodiment 1 obtains and common 2.5D protective films in the prior art
Than result is as shown in table 1 below：
Table 1
As seen from the above-described embodiment, the 2.5D protective films of the embodiment of the present invention have light transmittance high, and mist degree is low；It is hot-forming
Property it is good, solve the problems, such as that PC faces do not generate corner easily after solvent resistant, poor adhesive force, fitting Mobile phone screen and warp grey side；Firmly
Changing layer has high abrasion, high rigidity, AF anti-fingerprint, the smooth senses of AG；Silicone pressure sensitive adhesivity is moderate, can secure fit mobile phone glass
The advantages of glass cover board, venting quality is excellent；It realizes ease for use and high performance perfect adaptation.
Claims (10)
1. a kind of 2.5D protective films, are multilayered structure, there is PET base material layer, the first silicone pressure sensitive compound protective layer, polypropylene
Acid resin hardened layer, the first special optical level PET substrate layer, OCA optics polyacrylic acid glue-line, the second special optical level PET base
Material layer and the second silicone pressure sensitive compound protective layer.
2. 2.5D protective films according to claim 1, it is characterised in that：The PET base material layer, the first organosilicon pressure
Quick compound protective layer, the polyacrylic resin hardened layer, the first special optical level PET substrate layer, the OCA optics poly- third
Olefin(e) acid glue-line, the second special optical level PET substrate layer and the second silicone pressure sensitive compound protective layer are bonded successively.
3. 2.5D protective films according to claim 1 or 2, it is characterised in that：
The thickness of the PET base material layer is 25-100 μm,
The thickness of the first silicone pressure sensitive compound protective layer is 5-15 μm,
The thickness of the polyacrylic resin hardened layer is 2-6 μm,
The thickness of the first special optical PET base material layer is 25-125 μm,
The thickness of the OCA optics polyacrylic acid glue-line is 5-30 μm,
The thickness of the second special optical PET base material layer is 25-125 μm,
The thickness of the second silicone pressure sensitive compound protective layer is 10-50 μm.
4. 2.5D protective films according to claim 1 or 2, it is characterised in that：The 2.5D protective films further include PET fluorine elements
Release film layer, the PET fluorine elements release film layer fit with the pressure-sensitive compound protective layer of machine silicon, and positioned at the 2.5D protective films
Outermost layer；Preferably, the thickness of the PET fluorine elements release film layer is 25-100 μm.
5. 2.5D protective films according to claim 1 or 2, it is characterised in that：In terms of mass percentage, described first has
The raw material of the pressure-sensitive compound protective layer of machine silicon and the second silicone pressure sensitive compound protective layer composition includes：
Solvent 50%-80%, silicon raw rubber 5%-20%, silicones 5%-20%, crosslinking agent 0.5%-1%, adhesion promoter
0.5%-1% and catalyst 0.5%-1.5%, summation 100%；
Preferably, the solvent include ethyl acetate, n-butyl acetate, toluene, PMA, butanone, IPA and ethyl alcohol in one kind or
Several combinations；
Preferably, the silicon raw rubber includes the dimethyl silicone polymer of ethenyl blocking and/or the poly dimethyl of ethenyl blocking
Phenyl siloxane；
Preferably, the silicones includes MQ silicones；
Preferably, the crosslinking agent includes containing hydrogen silicone oil；
Preferably, the adhesion promoter includes the organosiloxane of compound carboxy blocking and/or hydroxy-end capped organosilicon
Oxygen alkane；
Preferably, the catalyst is platinum catalyst.
6. 2.5D protective films according to claim 1 or 2, it is characterised in that：The original of the polyacrylic resin hardened layer
Material composition includes：
The photoinitiator of the solvent of 40-80 parts by weight, the resin of 20-60 parts by weight and 0.3-1 parts by weight；
The resin includes that polyurethane is acrylic resin modified and/or Organic fluoride modified polypropene acid resin；
The photoinitiator includes 2- hydroxy-2-methyl -1- phenylacetones and/or 1- hydroxycyclohexyl phenyl ketones；
The solvent includes the combination of one or more of ethyl acetate, n-butyl acetate, toluene, MIBK and PGM.
7. 2.5D protective films according to claim 1 or 2, which is characterized in that the first special optical PET base material layer and
Second special optical PET base material layer is prepared respectively by the three-layer co-extruded technique of A/B/C three-decker die heads；Wherein,
A/C die heads squeeze out modified high rigidity, high heat-resisting PET film, and B die heads squeeze out modified low Tg polyester.
8. the preparation method of claim 1-7 any one of them 2.5D protective films, includes the following steps：
By the three-layer co-extruded technique of A/B/C three-decker die heads, the first special optical PET base material layer and second special is respectively obtained
Optics PET base material layer；
The second special light is coated on by Slot-die coating methods after the raw material of second silicone pressure sensitive compound protective layer is mixed
On a face for learning PET base material layer, the second silicone pressure sensitive compound protective layer is obtained；
The raw material of polyacrylic resin hardened layer is coated on a face of the first special optical PET base material layer, obtains poly- third
Olefin(e) acid hardening of resin layer；
OCA optics polyacrylic acid is coated on the another of the first special optical PET base material layer or the second special optical PET base material layer
On a face, OCA optics polyacrylic acid glue-lines are obtained；
By OCA optics polyacrylic acid glue-lines and uncoated corresponding second special optical PET base material layer or the first special light
PET base material layer is learned to fit；
The first organic pressure-sensitive gel is coated in the non-binding face of polyacrylic resin hardened layer by Slot-die coating methods to protect
The raw material of sheath obtains the first silicone pressure sensitive glue-line；
The first silicone pressure sensitive glue-line non-binding face fitting PET base material layer to get to 2.5D protective films.
9. preparation method according to claim 8, it is characterised in that：The preparation method is additionally included in the second silicone pressure sensitive
The step of non-binding face fitting PET fluorine element release film layers of glue-line.
10. preparation method according to claim 8, it is characterised in that：It is special that the preparation method is additionally included in obtain first
To the first special optical PET base material layer and the second special light after optics PET base material layer and the second special optical PET base material layer
Learn the step of PET base material layer carries out double spread pretreatment priming coat；The raw material of the pretreatment priming coat for polyurethane or gathers
Acrylate.
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| CN201711400390.1A CN108192520A (en) | 2017-12-22 | 2017-12-22 | A kind of 2.5D protective films and preparation method thereof |
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| US11924982B2 (en) | 2020-11-17 | 2024-03-05 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Curved display apparatus and method of fabricating curved display apparatus |
| CN112646504A (en) * | 2020-12-15 | 2021-04-13 | 合肥乐凯科技产业有限公司 | Protection cover plate and mobile terminal |
| CN112646504B (en) * | 2020-12-15 | 2022-05-03 | 合肥乐凯科技产业有限公司 | Protection cover plate and mobile terminal |
| CN114686140A (en) * | 2020-12-31 | 2022-07-01 | 太湖金张科技股份有限公司 | Silica gel protection film that low silicon shifted |
| CN113088211A (en) * | 2021-04-29 | 2021-07-09 | 江西昊泽光学膜科技有限公司 | Extreme-free hot-bending polyester protective film, preparation method and application thereof |
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