CN110330909B - Double-sided acrylic protective film and preparation method and application thereof - Google Patents
Double-sided acrylic protective film and preparation method and application thereof Download PDFInfo
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- CN110330909B CN110330909B CN201910749155.8A CN201910749155A CN110330909B CN 110330909 B CN110330909 B CN 110330909B CN 201910749155 A CN201910749155 A CN 201910749155A CN 110330909 B CN110330909 B CN 110330909B
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- acrylic adhesive
- layer
- protective film
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- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 230000001681 protective effect Effects 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000000758 substrate Substances 0.000 claims abstract description 73
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 239000011248 coating agent Substances 0.000 claims abstract description 21
- 238000000576 coating method Methods 0.000 claims abstract description 21
- 239000010410 layer Substances 0.000 claims description 315
- 239000003522 acrylic cement Substances 0.000 claims description 165
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 24
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 24
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 8
- 229920000178 Acrylic resin Polymers 0.000 claims description 8
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 8
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 8
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 8
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 8
- 239000002216 antistatic agent Substances 0.000 claims description 5
- 238000003475 lamination Methods 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims 4
- 230000008023 solidification Effects 0.000 claims 4
- 239000003292 glue Substances 0.000 abstract description 43
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052710 silicon Inorganic materials 0.000 abstract description 15
- 239000010703 silicon Substances 0.000 abstract description 15
- 238000012546 transfer Methods 0.000 abstract description 13
- 230000003068 static effect Effects 0.000 abstract description 9
- 230000005611 electricity Effects 0.000 abstract description 8
- 238000010030 laminating Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001723 curing Methods 0.000 description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 19
- 239000000741 silica gel Substances 0.000 description 19
- 229910002027 silica gel Inorganic materials 0.000 description 19
- 239000005341 toughened glass Substances 0.000 description 16
- 241000533950 Leucojum Species 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 8
- 238000013007 heat curing Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000012790 adhesive layer Substances 0.000 description 5
- 229920000297 Rayon Polymers 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- -1 acryl Chemical group 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000013464 silicone adhesive Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- 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
- C09J133/10—Homopolymers or copolymers of methacrylic acid esters
- C09J133/12—Homopolymers or copolymers of methyl methacrylate
-
- 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
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
-
- 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
-
- 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
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
-
- 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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
-
- 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
- C09J2301/124—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 on both sides of the carrier, e.g. double-sided adhesive tape
-
- 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
- C09J2467/005—Presence of polyester in the release coating
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention relates to a double-sided acrylic protective film and a preparation method and application thereof. The preparation method comprises the following steps: coating acrylic glue on the upper surface and the lower surface of the PET substrate layer respectively to obtain a first acrylic glue layer and a second acrylic glue layer, and respectively pasting a PET release film and a PET stripping film on one sides of the first acrylic glue layer and the second acrylic glue layer, which are away from the PET substrate layer, after heating and curing to obtain the double-sided acrylic protective film. The protective film has excellent exhaust performance and laminating performance, can effectively reduce static electricity generation, and avoids negative effects caused by silicon transfer in the traditional AB glue.
Description
Technical Field
The invention relates to the technical field of protective films, in particular to a double-sided acrylic protective film and a preparation method and application thereof.
Background
The protective film has been applied to living aspects and can be classified into a digital product protective film, an automobile protective film, a household protective film, a food fresh-keeping protective film, etc. according to the use. The protective film generally has good adhesion and can be easily peeled off after use without contaminating the surfaces with an adhesive. In the production process of the protective film, some colloids such as acrylic glue, PU glue and silica gel are needed, and the protective film adopts a PET silica gel protective film and a PET acrylic protective film as main types according to the application of the protective film and the use of different colloids. The toughened glass film is a high-tech protective film specially designed for protecting the mobile phone screen, is a product with the most strengthening protection on the protective screen at present, can completely cover the original screen surface, prevents the damage of external force, and further increases the impact absorption.
CN205800424U discloses a toughened glass film, including PET from type rete, high viscose acrylic glue film, transparent PET substrate layer, low viscose silica gel layer and PET complex film layer, PET is from type rete, high viscose acrylic glue film, transparent PET substrate layer, low viscose silica gel layer and PET complex film layer stack gradually and constitute five-layer lamination structure. According to the utility model, the high-viscosity acrylic adhesive layer is attached to the toughened glass, and the low-viscosity silica gel layer is attached to the screen, so that the screen is protected, and the problem of snowflakes or pits in the using process is prevented by utilizing the attaching performance of Gao Nianya acrylic adhesive. However, the protective film is easy to generate static electricity in the using process, and the product is easy to be damaged due to the silicon transfer phenomenon caused by the silica gel layer.
CN205905510U discloses a high-efficient protective performance mobile phone toughening film, which comprises a PET protection film layer, a super white toughened glass layer, a first EVA layer, a silicon crystal plate layer, a second EVA layer and a TPT back plate layer which are sequentially arranged from top to bottom, wherein the PET protection film layer, the super white toughened glass layer, the first EVA layer, the silicon crystal plate layer, the second EVA layer and the TPT back plate layer are all connected through an adhesive. The protective film is also unavoidable from negative effects of static electricity and silicon transfer.
CN106626623a discloses an explosion-proof and stamping-resistant toughened glass protection film, which comprises a coating adhesive layer, an exhaust silica gel layer, an electric conduction silica gel layer, a heat conduction silica gel layer, an eye protection layer, a waterproof layer and an explosion-proof layer, wherein the outer edges of the layers are bonded together through an adhesive layer. This explosion-proof resistant toughened glass protection film of punching press through setting up electrically conductive silica gel layer and heat conduction silica gel layer, can prevent this explosion-proof resistant toughened glass protection film of punching press and bring the dust to the surface of glass panel because of self static reason easily, has improved the definition of electronic product image. But has the disadvantage that the negative effects of static electricity and silicon transfer cannot be avoided.
Therefore, it is very significant to develop a protective film which can effectively reduce static electricity generation, has no silicon transfer phenomenon, can better protect products, and has good air exhaust property and good adhesion.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a double-sided acrylic protective film and a preparation method and application thereof.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
in one aspect, the invention relates to a double-sided acrylic protective film, which comprises a PET release film layer, a first acrylic adhesive layer, a PET substrate layer, a second acrylic adhesive layer and a PET stripping film layer which are sequentially contacted.
The double-sided acrylic protective film disclosed by the invention does not contain silica gel and has no silicon transfer phenomenon, namely the product damage risk caused by silicon transfer can be avoided, and meanwhile, the protective film can effectively reduce static electricity generation and reduce adhesion of dust on the surface of a product. In addition, the second acrylic adhesive layer of the protective film has similar performance to that of silica gel, and also has excellent exhaust performance and laminating performance.
Preferably, the peel force of the first acryl glue layer is 500 to 900gf/25mm, for example 500gf/25mm, 550gf/25mm, 600gf/25mm, 650gf/25mm, 680gf/25mm, 700gf/25mm, 750gf/25mm, 800gf/25mm, 850gf/25mm, 900gf/25mm, etc.
Preferably, the peel force of the second acrylic adhesive layer is 1-3gf/25mm, for example 1gf/25mm, 1.2gf/25mm, 1.5gf/25mm, 1.8gf/25mm, 2gf/25mm, 2.2gf/25mm, 2.5gf/25mm, 2.8gf/25mm, 3gf/25mm, or the like.
The peeling force of the first acrylic adhesive layer is specifically selected within the range of 500-900gf/25mm, if the peeling force exceeds 900gf/25mm, the problems that reworking is difficult to occur in the next production process (attaching the toughened glass) and colloid is easy to remain on the surface of the toughened glass are firstly caused, and secondly, the air exhaust rate of the protective film is obviously reduced when the screen is attached due to overlarge peeling force; if the thickness is less than 500gf/25mm, the product can be used for a period of time, and then the colloid is dropped off, so that the product cannot be used continuously.
The specific stripping force of the second acrylic adhesive layer is selected within the range of 1-3gf/25mm, if the stripping force exceeds 3gf/25mm, the exhaust rate of the product is obviously reduced when the product is attached to a screen, even the phenomenon of no exhaust occurs, and the stripping film is difficult to tear and even the phenomenon of reverse release occurs; less than 1gf/25mm may result in a product that is not conformable when conforming to an electronic product screen.
Preferably, the thickness of the first acrylic adhesive layer is 30 to 50 μm, for example 30 μm, 32 μm, 35 μm, 37 μm, 40 μm, 42 μm, 44 μm, 46 μm, 48 μm or 50 μm, etc., preferably 40 to 50 μm.
Preferably, the thickness of the second acrylic adhesive layer is 20 to 30 μm, for example 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, 26 μm, 27 μm, 28 μm or 30 μm, etc., preferably 25 to 30 μm.
Preferably, the thickness of the PET substrate layer is 25-100 μm, for example 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 70 μm, 80 μm, 90 μm or 100 μm, etc.
The thickness of first ya keli glue film and the thickness of second ya keli glue film are selected in above-mentioned numerical range, just can guarantee that the product has good laminating nature, prevent that the product from appearing snowflake when laminating.
Preferably, the components of the first acrylic adhesive layer comprise acrylic resin, a curing agent and a solvent.
Preferably, the curing agent includes any one or a combination of at least two of benzoyl peroxide, cumene hydroperoxide or tert-butyl hydroperoxide, for example, a combination of benzoyl peroxide and cumene hydroperoxide, a combination of cumene hydroperoxide and tert-butyl hydroperoxide, a combination of benzoyl peroxide and tert-butyl hydroperoxide, etc., and any other combination means is not presented here.
Preferably, the solvent includes any one or a combination of at least two of propylene glycol methyl ether acetate, ethyl acetate or toluene, for example, a combination of propylene glycol methyl ether acetate and ethyl acetate, a combination of ethyl acetate and toluene, a combination of propylene glycol methyl ether acetate and toluene, etc., and any other combination means is not presented here.
Preferably, the mass ratio of the acrylic resin, curing agent and solvent is 100 (2-3): (15-25), such as 100:2.4:20, 100:2:20, 100:3:20, 100:2.4:15, 100:2.4:25, 100:2:15, 100:2:25, 100:3:15, 100:3:25, 100:2.4:18 or 100:2.4:22, etc.
Preferably, the components of the first acrylic adhesive layer further comprise an antistatic agent.
Preferably, the components of the second acrylic adhesive layer comprise acrylic resin, a curing agent and a solvent.
Preferably, the curing agent includes any one or a combination of at least two of benzoyl peroxide, cumene hydroperoxide or tert-butyl hydroperoxide, for example, a combination of benzoyl peroxide and cumene hydroperoxide, a combination of cumene hydroperoxide and tert-butyl hydroperoxide, a combination of benzoyl peroxide and tert-butyl hydroperoxide, etc., and any other combination means is not presented here.
Preferably, the solvent includes any one or a combination of at least two of propylene glycol methyl ether acetate, ethyl acetate or toluene, for example, a combination of propylene glycol methyl ether acetate and ethyl acetate, a combination of ethyl acetate and toluene, a combination of propylene glycol methyl ether acetate and toluene, etc., and any other combination means is not presented here.
Preferably, the mass ratio of the acrylic resin, the curing agent and the solvent is 100 (0.4-0.6): (5-15), such as 100:0.5:10, 100:0.5:5, 100:0.5:15, 100:0.4:10, 100:0.6:10, 100:0.5:8, 100:0.5:12, 100:0.4:5, 100:0.4:15 or 100:0.6:15, etc.
Preferably, the components of the second acrylic adhesive layer further include an antistatic agent.
The antistatic agent is added into the first acrylic adhesive layer or the second acrylic adhesive layer, so that the antistatic effect of the double-sided acrylic protective film can be further improved.
On the other hand, the invention provides a preparation method of the double-sided acrylic protective film, which comprises the following steps: coating acrylic glue on the upper surface and the lower surface of the PET substrate layer respectively to obtain a first acrylic glue layer and a second acrylic glue layer, and respectively pasting a PET release film and a PET stripping film on one sides of the first acrylic glue layer and the second acrylic glue layer, which are away from the PET substrate layer, after heating and curing to obtain the double-sided acrylic protective film.
Preferably, the preparation method specifically comprises the following steps:
(1) Coating a first acrylic adhesive layer on one side surface of the PET substrate layer to obtain a first acrylic adhesive layer, and attaching a PET release film on one surface of the first acrylic adhesive layer, which is away from the PET substrate layer, after heating and curing;
(2) And coating a second acrylic adhesive on the surface of the other side of the PET substrate layer to obtain a second acrylic adhesive layer, and attaching a PET stripping film on one surface of the second acrylic adhesive layer, which is away from the PET substrate layer, after heating and curing to obtain the double-sided acrylic protective film.
Preferably, the temperature of the heat curing in step (1) is 150-160 ℃, e.g. 150 ℃, 152 ℃, 154 ℃, 155 ℃, 156 ℃, 157 ℃, 158 ℃, 159 ℃, 160 ℃, etc.
Preferably, the time of the heat curing in step (1) is 1-3min, such as 1min, 1.2min, 1.5min, 1.8min, 2min, 2.2min, 2.5min, 2.8min or 3min, etc.
Preferably, the temperature of the heat curing in step (2) is 140-150 ℃, e.g. 140 ℃, 142 ℃, 144 ℃, 145 ℃, 146 ℃, 148 ℃, 149 ℃, 150 ℃, etc.
Preferably, the time of the heat curing in step (2) is 1-3min, such as 1min, 1.2min, 1.5min, 1.8min, 2min, 2.2min, 2.5min, 2.8min or 3min, etc.
Preferably, the preparation method specifically comprises the following steps:
(1) Coating a second acrylic adhesive layer on one side surface of the PET substrate layer to obtain a second acrylic adhesive layer, and attaching a PET stripping film on one surface of the second acrylic adhesive layer, which is away from the PET substrate layer, after heating and curing;
(2) And coating a first acrylic adhesive layer on the surface of the other side of the PET substrate layer to obtain a first acrylic adhesive layer, and attaching a PET release film on one surface of the first acrylic adhesive layer, which is away from the PET substrate layer, after heating and curing to obtain the double-sided acrylic protective film.
Preferably, the temperature of the heat curing in step (1) is 150-160 ℃, e.g. 150 ℃, 152 ℃, 154 ℃, 155 ℃, 156 ℃, 157 ℃, 158 ℃, 159 ℃, 160 ℃, etc.
Preferably, the time of the heat curing in step (1) is 1-3min, such as 1min, 1.2min, 1.5min, 1.8min, 2min, 2.2min, 2.5min, 2.8min or 3min, etc.
Preferably, the temperature of the heat curing in step (2) is 140-150 ℃, e.g. 140 ℃, 142 ℃, 144 ℃, 145 ℃, 146 ℃, 148 ℃, 149 ℃, 150 ℃, etc.
Preferably, the time of the heat curing in step (2) is 1-3min, such as 1min, 1.2min, 1.5min, 1.8min, 2min, 2.2min, 2.5min, 2.8min or 3min, etc.
The preparation of the double-sided acrylic protective film can be divided into two modes: firstly, a first acrylic adhesive layer is obtained, then a second acrylic adhesive layer is obtained, and the first acrylic adhesive layer is subjected to a two-time heating and curing process; secondly, a second acrylic adhesive layer is obtained firstly, then a first acrylic adhesive layer is obtained, and the second acrylic adhesive layer is subjected to a twice heating and curing process; the protective film obtained by the first preparation mode has better exhaust performance, and because the adhesive layer stripping force of the second acrylic adhesive layer is obviously changed when the second acrylic adhesive layer is subjected to secondary thermosetting, the adhesive layer stripping force is generally increased, so that data cannot be controlled, and poor laminating and exhaust are caused.
In still another aspect, the invention provides an application of the double-sided acrylic protective film in mobile phone lamination protection.
When the double-sided acrylic protective film is applied to the protection of the toughened glass of the mobile phone, the second acrylic adhesive layer is attached to the screen of the mobile phone, and the first acrylic adhesive layer is attached to the toughened glass.
Compared with the prior art, the invention has the following beneficial effects:
The double-sided acrylic protective film disclosed by the invention does not contain silica gel and has no silicon transfer phenomenon, namely the product damage risk caused by silicon transfer can be avoided, meanwhile, the protective film can effectively reduce static electricity generation and adhesion of dust on the surface of a product, and the instantaneous film tearing voltage is 0.02KV or below. In addition, the peeling force of the second acrylic adhesive layer of the protective film is lower, and the production process is stable, so that the adhesive has excellent exhaust performance, the thickness of the first acrylic adhesive layer of the protective film is thicker, the adhesive layer is soft, and the production process is stable, so that the adhesive has excellent laminating performance, and no snowflake or only sporadic snowflake is formed.
Drawings
Fig. 1 is a schematic view of a double-sided acryl protective film according to the present invention.
In the figure: 1 is a PET release film layer, 2 is a first acrylic adhesive layer, 3 is a PET substrate layer, 4 is a second acrylic adhesive layer, and 5 is a PET release film layer.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
Example 1
The embodiment provides a two-sided acrylic protection film, two-sided acrylic protection film is including PET from rete, first acrylic glue film, PET substrate layer, second acrylic glue film, the PET stripping film layer that contacts in proper order. The stripping force of the first acrylic adhesive layer and the second acrylic adhesive layer is 700gf/25mm and 2gf/25mm respectively, and the thickness of the PET release film layer, the first acrylic adhesive layer, the PET substrate layer, the second acrylic adhesive layer and the PET release film layer is 36 mu m, 40 mu m, 36 mu m, 25 mu m and 50 mu m respectively.
The preparation method comprises the following steps:
(1) Coating a first acrylic adhesive layer on one side surface of the PET substrate layer by using a comma scraper to obtain a first acrylic adhesive layer, heating and curing for 2min at 155 ℃, and then attaching a PET release film on one side of the first acrylic adhesive layer, which is away from the PET substrate layer;
(2) Coating a second acrylic adhesive layer on the surface of the other side of the PET substrate layer by using a comma scraper to obtain a second acrylic adhesive layer, heating and curing for 1min at 150 ℃, and then attaching a PET stripping film on one surface of the second acrylic adhesive layer, which is away from the PET substrate layer, to obtain the double-sided acrylic protective film.
Example 2
The embodiment provides a two-sided acrylic protection film, two-sided acrylic protection film is including PET from rete, first acrylic glue film, PET substrate layer, second acrylic glue film, the PET stripping film layer that contacts in proper order. The stripping force of the first acrylic adhesive layer and the second acrylic adhesive layer is 500gf/25mm and 3gf/25mm respectively, and the thickness of the PET release film layer, the first acrylic adhesive layer, the PET substrate layer, the second acrylic adhesive layer and the PET release film layer is 36 mu m, 30 mu m, 25 mu m, 20 mu m and 50 mu m respectively.
The preparation method comprises the following steps:
(1) Coating a first acrylic adhesive layer on one side surface of the PET substrate layer by using a comma scraper to obtain a first acrylic adhesive layer, heating and curing for 1min at 160 ℃, and then attaching a PET release film on one side of the first acrylic adhesive layer, which is away from the PET substrate layer;
(2) Coating a second acrylic adhesive layer on the surface of the other side of the PET substrate layer by using a comma scraper to obtain a second acrylic adhesive layer, and attaching a PET stripping film layer on one surface of the second acrylic adhesive layer, which is away from the PET substrate layer, after heating and curing for 1min at 140 ℃ to obtain the double-sided acrylic protective film.
Example 3
The embodiment provides a two-sided acrylic protection film, two-sided acrylic protection film is including PET from rete, first acrylic glue film, PET substrate layer, second acrylic glue film, the PET stripping film layer that contacts in proper order. The stripping force of the first acrylic adhesive layer and the second acrylic adhesive layer is 900gf/25mm and 1gf/25mm respectively, and the thickness of the PET release film layer, the first acrylic adhesive layer, the PET substrate layer, the second acrylic adhesive layer and the PET release film layer is 36 mu m, 50 mu m, 30 mu m and 50 mu m respectively.
The preparation method comprises the following steps:
(1) Coating a first acrylic adhesive layer on one side surface of the PET substrate layer by using a comma scraper to obtain a first acrylic adhesive layer, heating and curing for 2min at 150 ℃, and then attaching a PET release film on one side of the first acrylic adhesive layer, which is away from the PET substrate layer;
(2) Coating a second acrylic adhesive layer on the surface of the other side of the PET substrate layer by using a comma scraper to obtain a second acrylic adhesive layer, heating and curing for 1.5min at 140 ℃, and then pasting a PET stripping film on one surface of the second acrylic adhesive layer, which is away from the PET substrate layer, to obtain the double-sided acrylic protective film.
Example 4
The embodiment provides a two-sided acrylic protection film, two-sided acrylic protection film is including PET from rete, first acrylic glue film, PET substrate layer, second acrylic glue film, the PET stripping film layer that contacts in proper order. The stripping force of the first acrylic adhesive layer and the second acrylic adhesive layer is 1100gf/25mm and 2gf/25mm respectively, and the thickness of the PET release film layer, the first acrylic adhesive layer, the PET substrate layer, the second acrylic adhesive layer and the PET release film layer is 36 mu m, 40 mu m, 36 mu m, 25 mu m and 50 mu m respectively.
The preparation method is the same as in example 1.
Example 5
The embodiment provides a two-sided acrylic protection film, two-sided acrylic protection film is including PET from rete, first acrylic glue film, PET substrate layer, second acrylic glue film, the PET stripping film layer that contacts in proper order. The stripping force of the first acrylic adhesive layer and the second acrylic adhesive layer is 300gf/25mm and 2gf/25mm respectively, and the thickness of the PET release film layer, the first acrylic adhesive layer, the PET substrate layer, the second acrylic adhesive layer and the PET release film layer is 36 mu m, 40 mu m, 36 mu m, 25 mu m and 50 mu m respectively.
The preparation method is the same as in example 1.
Example 6
The embodiment provides a two-sided acrylic protection film, two-sided acrylic protection film is including PET from rete, first acrylic glue film, PET substrate layer, second acrylic glue film, the PET stripping film layer that contacts in proper order. The stripping force of the first acrylic adhesive layer and the second acrylic adhesive layer is 700gf/25mm and 5gf/25mm respectively, and the thickness of the PET release film layer, the first acrylic adhesive layer, the PET substrate layer, the second acrylic adhesive layer and the PET release film layer is 36 mu m, 40 mu m, 36 mu m, 25 mu m and 50 mu m respectively.
The preparation method is the same as in example 1.
Example 7
The embodiment provides a two-sided acrylic protection film, two-sided acrylic protection film is including PET from rete, first acrylic glue film, PET substrate layer, second acrylic glue film, the PET stripping film layer that contacts in proper order. The stripping force of the first acrylic adhesive layer and the second acrylic adhesive layer is 700gf/25mm and 0.5gf/25mm respectively, and the thickness of the PET release film layer, the first acrylic adhesive layer, the PET substrate layer, the second acrylic adhesive layer and the PET release film layer is 36 mu m, 40 mu m, 36 mu m, 25 mu m and 50 mu m respectively.
The preparation method is the same as in example 1.
Example 8
The embodiment provides a two-sided acrylic protection film, two-sided acrylic protection film is including PET from rete, first acrylic glue film, PET substrate layer, second acrylic glue film, the PET stripping film layer that contacts in proper order. The stripping force of the first acrylic adhesive layer and the second acrylic adhesive layer is 700gf/25mm and 2gf/25mm respectively, and the thickness of the PET release film layer, the first acrylic adhesive layer, the PET substrate layer, the second acrylic adhesive layer and the PET release film layer is 36 mu m, 40 mu m, 36 mu m, 40 mu m and 50 mu m respectively.
The preparation method is the same as in example 1.
Example 9
The embodiment provides a two-sided acrylic protection film, two-sided acrylic protection film is including PET from rete, first acrylic glue film, PET substrate layer, second acrylic glue film, the PET stripping film layer that contacts in proper order. The stripping force of the first acrylic adhesive layer and the second acrylic adhesive layer is 700gf/25mm and 2gf/25mm respectively, and the thickness of the PET release film layer, the first acrylic adhesive layer, the PET substrate layer, the second acrylic adhesive layer and the PET release film layer is 36 mu m, 40 mu m, 36 mu m, 10 mu m and 50 mu m respectively.
The preparation method is the same as in example 1.
Example 10
The embodiment provides a two-sided acrylic protection film, two-sided acrylic protection film is including PET from rete, first acrylic glue film, PET substrate layer, second acrylic glue film, the PET stripping film layer that contacts in proper order. The stripping force of the first acrylic adhesive layer and the second acrylic adhesive layer is 700gf/25mm and 2gf/25mm respectively, and the thickness of the PET release film layer, the first acrylic adhesive layer, the PET substrate layer, the second acrylic adhesive layer and the PET release film layer is 36 mu m, 25 mu m, 36 mu m, 25 mu m and 50 mu m respectively.
The preparation method is the same as in example 1.
Example 11
The embodiment provides a two-sided acrylic protection film, two-sided acrylic protection film is including PET from rete, first acrylic glue film, PET substrate layer, second acrylic glue film, the PET stripping film layer that contacts in proper order. The stripping force of the first acrylic adhesive layer and the second acrylic adhesive layer is 700gf/25mm and 2gf/25mm respectively, and the thickness of the PET release film layer, the first acrylic adhesive layer, the PET substrate layer, the second acrylic adhesive layer and the PET release film layer is 36 mu m, 60 mu m, 36 mu m, 25 mu m and 50 mu m respectively.
The preparation method is the same as in example 1.
Example 12
The embodiment provides a two-sided acrylic protection film, two-sided acrylic protection film is including PET from rete, first acrylic glue film, PET substrate layer, second acrylic glue film, the PET stripping film layer that contacts in proper order. The stripping force of the first acrylic adhesive layer and the second acrylic adhesive layer is 700gf/25mm and 2gf/25mm respectively, and the thickness of the PET release film layer, the first acrylic adhesive layer, the PET substrate layer, the second acrylic adhesive layer and the PET release film layer is 36 mu m, 40 mu m, 36 mu m, 25 mu m and 50 mu m respectively.
The preparation method comprises the following steps:
(1) Coating a second acrylic adhesive layer on one side surface of the PET substrate layer by using a comma scraper to obtain a second acrylic adhesive layer, heating and curing for 1min at 155 ℃, and then attaching a PET stripping film on one side of the second acrylic adhesive layer, which is away from the PET substrate layer;
(2) Coating a first acrylic adhesive layer on the surface of the other side of the PET substrate layer by using a comma scraper to obtain a first acrylic adhesive layer, heating and curing for 1min at 150 ℃, and then attaching a PET release film on one surface of the first acrylic adhesive layer, which is away from the PET substrate layer, to obtain the double-sided acrylic protective film.
Comparative example 1
The embodiment provides a protection film, the protection film includes PET from rete, ya keli glue film, PET substrate layer, silica gel layer, PET stripping film layer that contacts in proper order. The peeling forces of the acrylic adhesive layer and the silicone adhesive layer are respectively 700gf/25mm and 2gf/25mm, and the thicknesses of the PET release film layer, the acrylic adhesive layer, the PET substrate layer, the silicone adhesive layer and the PET release film layer are respectively 36 mu m, 40 mu m, 36 mu m, 25 mu m and 50 mu m.
The preparation method comprises the following steps:
(1) Coating silica gel on one side surface of the PET substrate layer by using a comma scraper, heating and curing for 1min at 155 ℃, and then attaching a PET stripping film on one side of the acrylic adhesive layer, which is away from the PET substrate layer;
(2) Coating an acrylic adhesive on the surface of the other side of the PET substrate layer by using a comma scraper, heating and curing for 1min at 150 ℃, and then attaching a PET release film on one surface of the silica gel layer, which is away from the PET substrate layer, so as to obtain the protective film.
The protective films prepared in examples 1 to 12 and comparative example 1 were subjected to the following performance evaluation tests, respectively:
(1) The exhaust performance evaluation method comprises the following specific steps: the toughened glass adopts 340 mu m toughened glass of IPhone 8, is attached to a screen of a real machine, and the time for exhausting is recorded by a stopwatch.
(2) The lamination performance is evaluated by the specific method: the toughened glass adopts 340 mu m toughened glass of IPhone 8, is attached to a screen of a true machine, and the appearance of snowflakes is observed.
(3) The silicon transfer evaluation method comprises the following specific steps: and (3) attaching the silica gel surface or the second acrylic adhesive layer of the product to a screen of a real machine, performing double-85 test for 168 hours in a constant temperature and humidity machine, and tearing off the protective film to see the haze of the screen.
(4) The antistatic adsorption capacity evaluation method comprises the following specific steps: and (3) attaching the silica gel surface or the second acrylic adhesive layer of the product to a screen of a true machine, and testing the instant film tearing voltage by using a handheld electrostatic tester.
The various performance parameters of the protective films prepared in examples 1-12 and comparative example 1 are shown in Table 1:
TABLE 1
As can be seen from the data in table 1: the double-sided acrylic protective film has no silicon transfer phenomenon, can avoid the product damage risk caused by silicon transfer, can effectively reduce static electricity generation, and has excellent exhaust performance and laminating performance. As shown by the evaluation results of examples 4 to 7, the peeling force of the first acrylic adhesive layer and the second acrylic adhesive layer affects the adhesion and the air release of the product; if the stripping force of the first acrylic adhesive layer is too large, the air exhaust is slow when the product is attached; if the peeling force of the second acrylic adhesive layer is too large, the peeling film is difficult to tear, and a reverse release phenomenon occurs; if the stripping force of the first acrylic adhesive layer is too small, the product is seriously attached to snowflake; if the peeling force of the second acrylic adhesive layer is too small, the product lamination becomes poor or even difficult.
From the evaluation results of examples 8 to 11, it is known that the thickness of the first acrylic adhesive layer and the second acrylic adhesive layer also affects the adhesion and the air release properties of the product; if the thickness of the first acrylic adhesive layer is too thick, the performance of the product is basically not affected, but the manufacturing cost is increased; if the thickness of the second acrylic adhesive layer is too thick, the stripping force can be too large, and the exhaust performance of the product is affected; if the thickness of the first acrylic adhesive layer is too thin, the product is seriously attached to snowflakes; if the thickness of the second acrylic adhesive layer is too thin, the product is seriously attached to snowflakes.
As is clear from the evaluation results of example 12, the product manufacturing process according to the present invention also has an influence on the air release properties of the product, and if the second acrylic adhesive layer is manufactured first and then the first acrylic adhesive layer is manufactured, the air release properties of the product are slightly deteriorated, and the peeling film tearing force of the product is heavy. From the evaluation results of comparative example 1, it is understood that the conventional AB glue manufacturing process has a negative influence on silicon transfer and the antistatic adsorption ability is deteriorated.
The applicant states that the present invention is described by the above examples as a double-sided acryl protective film of the present invention and a method of preparing the same and application thereof, but the present invention is not limited to the above examples, i.e., it does not mean that the present invention must be implemented depending on the above examples. It should be apparent to those skilled in the art that any modification of the present invention, equivalent substitution of raw materials for the product of the present invention, addition of auxiliary components, selection of specific modes, etc., falls within the scope of the present invention and the scope of disclosure.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Claims (14)
1. The double-sided acrylic protective film is characterized by comprising a PET release film layer, a first acrylic adhesive layer, a PET substrate layer, a second acrylic adhesive layer and a PET stripping film layer which are contacted in sequence;
the first acrylic adhesive layer component comprises acrylic resin, a curing agent and a solvent;
the second acrylic adhesive layer component comprises acrylic resin, a curing agent and a solvent;
The stripping force of the first acrylic adhesive layer is 500-900gf/25mm;
the peeling force of the second acrylic adhesive layer is 1-3gf/mm;
The thickness of the first acrylic adhesive layer is 30-50 mu m;
the thickness of the second acrylic adhesive layer is 20-30 mu m;
the double-sided acrylic protective film is prepared by adopting the following method, and the preparation method comprises the following steps:
(1) Coating a first acrylic adhesive layer on one side surface of the PET substrate layer to obtain a first acrylic adhesive layer, and attaching a PET release film on one surface of the first acrylic adhesive layer, which is away from the PET substrate layer, after heating and curing;
(2) Coating a second acrylic adhesive layer on the surface of the other side of the PET substrate layer to obtain a second acrylic adhesive layer, and attaching a PET stripping film on one surface of the second acrylic adhesive layer, which is away from the PET substrate layer, after heating and curing to obtain the double-sided acrylic protective film;
the temperature of the heating solidification in the step (1) is 150-160 ℃;
The heating and curing time in the step (1) is 1-3 min;
the temperature of the heating solidification in the step (2) is 140-150 ℃;
And (3) heating and curing for 1-3 min hours in the step (2).
2. The double-sided acrylic protective film according to claim 1, wherein the thickness of the first acrylic adhesive layer is 40-50 μm.
3. The double-sided acrylic protective film according to claim 1, wherein the thickness of the second acrylic adhesive layer is 25-30 μm.
4. The double-sided acrylic protective film according to claim 1, wherein the thickness of the PET substrate layer is 25-100 μm.
5. The two-sided acrylic protective film of claim 1, wherein the curing agent of the first acrylic adhesive layer comprises any one or a combination of at least two of benzoyl peroxide, cumene hydroperoxide or t-butyl hydroperoxide.
6. The double-sided acrylic protective film according to claim 1, wherein the solvent of the first acrylic adhesive layer comprises any one or a combination of at least two of propylene glycol methyl ether acetate, ethyl acetate, or toluene.
7. The double-sided acrylic protective film according to claim 1, wherein the mass ratio of the acrylic resin, the curing agent and the solvent of the first acrylic adhesive layer is 100 (2-3): 15-25.
8. The two-sided acrylic protective film of claim 1, wherein the composition of the first acrylic adhesive layer further comprises an antistatic agent.
9. The two-sided acrylic protective film of claim 1, wherein the curing agent of the second acrylic adhesive layer comprises any one or a combination of at least two of benzoyl peroxide, cumene hydroperoxide or t-butyl hydroperoxide.
10. The double-sided acrylic protective film of claim 1, wherein the solvent of the second acrylic adhesive layer comprises any one or a combination of at least two of propylene glycol methyl ether acetate, ethyl acetate, or toluene.
11. The double-sided acrylic protective film according to claim 1, wherein the mass ratio of the acrylic resin, the curing agent and the solvent of the second acrylic adhesive layer is 100 (0.4-0.6): 5-15.
12. The two-sided acrylic protective film of claim 1, wherein the composition of the second acrylic adhesive layer further comprises an antistatic agent.
13. The method for preparing the double-sided acrylic protective film according to any one of claims 1 to 12, wherein the method specifically comprises the steps of:
(1) Coating a first acrylic adhesive layer on one side surface of the PET substrate layer to obtain a first acrylic adhesive layer, and attaching a PET release film on one surface of the first acrylic adhesive layer, which is away from the PET substrate layer, after heating and curing;
(2) Coating a second acrylic adhesive layer on the surface of the other side of the PET substrate layer to obtain a second acrylic adhesive layer, and attaching a PET stripping film on one surface of the second acrylic adhesive layer, which is away from the PET substrate layer, after heating and curing to obtain the double-sided acrylic protective film;
the temperature of the heating solidification in the step (1) is 150-160 ℃;
The heating and curing time in the step (1) is 1-3 min;
the temperature of the heating solidification in the step (2) is 140-150 ℃;
And (3) heating and curing for 1-3 min hours in the step (2).
14. The use of a double-sided acrylic protective film according to any one of claims 1-12 in cell phone lamination protection.
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