CN109868080A - Novel high viscous protective film of one kind and preparation method thereof - Google Patents
Novel high viscous protective film of one kind and preparation method thereof Download PDFInfo
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- CN109868080A CN109868080A CN201811568836.6A CN201811568836A CN109868080A CN 109868080 A CN109868080 A CN 109868080A CN 201811568836 A CN201811568836 A CN 201811568836A CN 109868080 A CN109868080 A CN 109868080A
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Abstract
The present invention relates to Protective coatings fields, more particularly, to a kind of novel high viscous protective film and preparation method thereof.In order to solve high viscous protective film during uncoiling, surface layer and adhesion coating are easy adhesion, and the problem of being not easily stripped, the present invention provides novel high viscous protective film of one kind and preparation method thereof.The high viscous protective film successively includes surface layer, sandwich layer and adhesion coating; wherein, the surface layer includes Ethylene-Propylene Block Copolymer 55-80%, high density polyethylene (HDPE) 0%-30%; the total amount of release resin 0%-20%, the high density polyethylene (HDPE) and release resin is 20%-45%.The adhesion strength of the protective film is high, and attaching effect is good, and adhesion strength changes small, easily peelable, no residue glue with temperature and time, and Yi Xiejuan is suitable as the optical material surface protective film of high viscous demand.
Description
Technical field
The present invention relates to Protective coatings fields, more particularly, to a kind of novel high viscous protective film and preparation method thereof.
Background technique
In recent years, with the fast development of electronic industry, the demand this kind of to ultrathin displays such as liquid crystal displays is also got over
Come bigger.And liquid crystal display is mainly formed by a variety of optical film combinations.Optical diaphragm is being carried and was being assembled in order to prevent
By spot or scuffing in journey, need to protect its surface.Since protective film is by three layers of surface layer, sandwich layer and adhesion coating one
Made of film, it will usually be wound into roll, especially for the viscous protective film of height, under biggish winding pressure, surface layer and
Adhesion coating closely attaches, and the adhesion-promoting components in adhesion coating are readily migrate on surface layer, causes uncoiling difficulty and adhesion coating adhesion strength deficiency etc.
Problem.Especially after attaching optical film products experience high temperature shelf test, peeling force is significantly increased, and can be in quilt after removing
Patch object surface leaves offset printing, influences finally to use.
Summary of the invention
In order to solve high viscous protective film during uncoiling, surface layer and adhesion coating are easy adhesion, the problem of being not easily stripped, this hair
It is bright that novel high viscous protective film of one kind and preparation method thereof is provided.The uncoiling power that the height glues protective film is low, i.e. protective film uncoiling when institute
The power needed is low, and surface layer will not pollute adhesion coating, influence adhesion strength.Moreover, the adhesion strength that the height glues protective film is high, patch
Attached effect is good, and adhesion strength changes with temperature and time influences small, no residue glue, easily peelable, Yi Xiejuan, has been suitable as high viscous demand
Optical material surface protective film.
In order to solve the above-mentioned technical problem, the present invention uses following technical scheme.
The present invention provides a kind of novel high viscous protective film, and the high viscous protective film successively includes surface layer, sandwich layer and adhesion coating,
In, the surface layer includes Ethylene-Propylene Block Copolymer 55-80%, high density polyethylene (HDPE) 0%-30%, release resin 0%-
20%, the percentage composition is weight percentage (being also referred to as weight percentage).The high density polyethylene (HDPE) and release resin
Total amount be 20%-45%.
Further, the density of the Ethylene-Propylene Block Copolymer on surface layer is in 0.90-0.91g/cm3Between, melt index
Between 4.0-9.0g/10min.
Further, the surface layer includes Ethylene-Propylene Block Copolymer 55-72%, high density polyethylene (HDPE) 25%-
30%, release resin 3%-15%, the percentage composition are weight percentage.The high density polyethylene (HDPE) and release resin
Total amount is 28%-45%.The density of the Ethylene-Propylene Block Copolymer on surface layer is 0.90g/cm3, melt index 4.0g/
10min.Preceding solution includes embodiment 4-5 and embodiment 9.
Further, the density of the high-density polyethylene resin in surface layer is in 0.945-0.963g/cm3Between, melting refers to
Number is between 4.0-9.0g/10min.
Further, the release resin in surface layer is the polyvinyl by styrene chemical modification.
In the novel high viscous protective film, sandwich layer is selected from acrylic resin, and the acrylic resin is that ethylene-propylene is embedding
Section copolymer.
Further, the Ethylene-Propylene Block Copolymer of the sandwich layer, density 0.91g/cm3, melt index is
4.0g/10min。
Further, in the novel high viscous protective film, adhesion coating is acrylic block copolymer, and density exists
1.08-1.13g/cm3Between, melt index is between 1.2-3.5g/10min.
The acrylic block copolymer of the adhesion coating is methyl methacrylate-butyl acrylate-methyl methacrylate
Ester block copolymer.By polymethyl methacrylate as hardness section, butyl polyacrylate is as soft segment.
Further, in the novel high viscous protective film, the skin depth is 8-10 μm, core layer thickness 28-
32 μm, adhesion coating is with a thickness of 8-10 μm.
Novel high viscous protective film the preparation method comprises the following steps: being prepared in a manner of three-layer co-extruded curtain coating.
Adhesion coating formula of the invention uses acrylic block copolymer, by polymethyl methacrylate as hardness section,
Butyl polyacrylate is as soft segment, and with polystyrene block copolymer elastomer phase ratio general at present, soft segment has lower
Tg, it is more soft, better adhesiving effect and holding power can be provided.And polystyrene blend elastomer as adhesion coating when it is past
Toward needing to add the adhesion promoting components such as Petropols, terpene resin to improve adhesion strength, when adding proportion is excessively high, adhesion strength is with temperature
Degree is changed greatly with the time, is easy to leave residue glue on affixed object surface, be polluted.Acrylic block provided by the invention
Copolymer adhesion coating scheme does not need to be compounded with other adhesion promoting components, and direct use can meet optics membrane superficial tissue pair
The demand of high viscosity.Nor there are problems that adhesion coating is precipitated and is difficult to resolve volume.
Compared with prior art, the uncoiling power of novel high viscous protective film provided by the invention is low, and surface layer will not make adhesion coating
At pollution, adhesion strength is influenced.Moreover, the adhesion strength that the height glues protective film is high, attaching effect is good, no residue glue, easily peelable, adhesion strength
It is influenced with temperature and time variation small.
Specific embodiment
The present invention is described in detail combined with specific embodiments below, but the present invention is not limited to these embodiments.
It is as follows for the performance test methods of protective film:
(1) tensile strength, elongation at break test
Using U.S.'s Instron universal testing machine, reference standard is GB/T 1040.3.
(2) uncoiling power, peel test force
Cupping machine is good for using section, reference standard is GB/T 2792.
The test of uncoiling power: the film sample of two layers of 25mm wide is superimposed and is fitted in standard steel plate, 2kg is then used
FINAT standard roller is with the film of 300mm/min speed rolling fitting.Topmost thin film is removed one section from lower film, so
It is tested afterwards according to 180 ° of peel strength test methods, records maximum value as uncoiling power.Uncoiling power does not have specific range, generally
For be it is more lower better, facilitate removing, be also not easy to remain.
Peel test force: the film sample of one layer of 25mm wide is fitted on PMMA plate, is then rolled with 2kgFINAT standard
Wheel is with the film of 300mm/min speed rolling fitting.Film is removed one section from PMMA plate, then according to 180 ° of peel strengths
Test method test records average value as peeling force.
(3) residue glue is tested
Protective film is fitted on optical diaphragm, is then pressed with laminating machine, places 3d in 50 DEG C of baking ovens, is taken out
The residue glue situation observed after protective film under light on optical diaphragm is torn, no residue glue is denoted as "○", has slight residue glue to be denoted as
" △ " has serious residue glue to be denoted as "×".The test indicates whether protective film has pollution to the surface of affixed object.There is no the residue glue to be
It is excellent, have slight residue glue be it is good, have serious residue glue be it is unqualified.
Embodiment 1
Novel high viscous protective film provided by the invention, successively includes surface layer, sandwich layer and adhesion coating.
Surface layer uses Ethylene-Propylene Block Copolymer and release resin to compound with 80%:20% ratio.Ethylene-the third
The density of alkene block copolymer is 0.90g/cm3, melt index 9.0g/10min.Release resin is by styrene chemical modification
Polyvinyl (Mitsubishi Chemical production, trade mark W200P).
Sandwich layer uses the Ethylene-Propylene Block Copolymer of weight percent 100%, density 0.90g/cm3, melting refers to
Number is 5.0g/10min.
Adhesion coating uses methyl methacrylate-butyl acrylate-methyl methacrylate segmented copolymer, and density is
1.13g/cm3, melt index 1.2g/10min.
Surface layer with a thickness of 10 μm, sandwich layer with a thickness of 30 μm, adhesion coating with a thickness of 10 μm.
Embodiment 2
The novel height provided such as embodiment 1 glues protective film, the difference is that:
Surface layer uses Ethylene-Propylene Block Copolymer and high density polyethylene (HDPE) to compound with 80%:20% ratio.Second
Alkene-propylene-based block copolymer density is 0.90g/cm3, melt index 9.0g/10min.The density of high density polyethylene (HDPE) is
0.945g/cm3。
Embodiment 3
The novel height provided such as embodiment 1 glues protective film, the difference is that:
Surface layer uses Ethylene-Propylene Block Copolymer, and high density polyethylene (HDPE) and release resin are with 80%:10%:10% ratio
Example compounds.The density of Ethylene-Propylene Block Copolymer is 0.91g/cm3, melt index 4.0g/10min.High density is poly-
The density of ethylene is 0.963g/cm3.Release resin be by styrene chemical modification polyvinyl (Mitsubishi Chemical produce,
The trade mark is W200P).
Adhesion coating uses methyl methacrylate-butyl acrylate-methyl methacrylate segmented copolymer.Its density is
1.11g/cm3, melt index 1.5g/10min.
Embodiment 4
The novel height provided such as embodiment 1 glues protective film, the difference is that:
Surface layer uses Ethylene-Propylene Block Copolymer, and high density polyethylene (HDPE) and release resin are with 72%:25%:3% ratio
It compounds.The density of Ethylene-Propylene Block Copolymer is 0.91g/cm3, melt index 4.0g/10min.High-density polyethylene
The density of alkene is 0.963g/cm3.Release resin is that (Mitsubishi Chemical produces, board by the polyvinyl of styrene chemical modification
Number be W200P).
Adhesion coating uses methyl methacrylate-butyl acrylate-methyl methacrylate segmented copolymer, and density is
1.08g/cm3, melt index 3.5g/10min.
Embodiment 5
The novel height provided such as embodiment 1 glues protective film, the difference is that:
Surface layer uses Ethylene-Propylene Block Copolymer, and high density polyethylene (HDPE) and release resin are with 67%:28%:5% ratio
It compounds.The density of Ethylene-Propylene Block Copolymer is 0.91g/cm3, melt index 4.0g/10min.High-density polyethylene
The density of alkene is 0.945g/cm3.Release resin is that (Mitsubishi Chemical produces, board by the polyvinyl of styrene chemical modification
Number be W200P).
Adhesion coating uses methyl methacrylate-butyl acrylate-methyl methacrylate segmented copolymer, and density is
1.08g/cm3, melt index 3.5g/10min.
Embodiment 6
The novel height provided such as embodiment 1 glues protective film, the difference is that:
Surface layer uses Ethylene-Propylene Block Copolymer, and high density polyethylene (HDPE) and release resin are with 65%:27%:8% ratio
It compounds.The density of Ethylene-Propylene Block Copolymer is 0.90g/cm3, melt index 9.0g/10min.High-density polyethylene
The density of alkene is 0.963g/cm3.Release resin is that (Mitsubishi Chemical produces, board by the polyvinyl of styrene chemical modification
Number be W200P).
Adhesion coating uses methyl methacrylate-butyl acrylate-methyl methacrylate segmented copolymer, and density is
1.11g/cm3, melt index 1.5g/10min.
Embodiment 7
The novel height provided such as embodiment 1 glues protective film, the difference is that:
Surface layer uses Ethylene-Propylene Block Copolymer, and high density polyethylene (HDPE) and release resin are with 60%:28%:12% ratio
Example compounds.The density of Ethylene-Propylene Block Copolymer is 0.90g/cm3, melt index 9.0g/10min.High density is poly-
The density of ethylene is 0.945g/cm3.Release resin be by styrene chemical modification polyvinyl (Mitsubishi Chemical produce,
The trade mark is W200P).
Adhesion coating uses methyl methacrylate-butyl acrylate-methyl methacrylate segmented copolymer, and density is
1.13g/cm3, melt index 1.2g/10min.
Embodiment 8
The novel height provided such as embodiment 1 glues protective film, the difference is that:
Surface layer uses Ethylene-Propylene Block Copolymer, and high density polyethylene (HDPE) and release resin are with 60%:22%:18% ratio
Example compounds.The density of Ethylene-Propylene Block Copolymer is 0.90g/cm3, melt index 9.0g/10min.High density is poly-
The density of ethylene is 0.963g/cm3.Release resin be by styrene chemical modification polyvinyl (Mitsubishi Chemical produce,
The trade mark is W200P).
Adhesion coating uses methyl methacrylate-butyl acrylate-methyl methacrylate segmented copolymer, and density is
1.11g/cm3, melt index 1.5g/10min.
Embodiment 9
The novel height provided such as embodiment 1 glues protective film, the difference is that:
Surface layer uses Ethylene-Propylene Block Copolymer, and high density polyethylene (HDPE) and release resin are with 55%:30%:15% ratio
Example compounds.The density of Ethylene-Propylene Block Copolymer is 0.91g/cm3, melt index 4.0g/10min.High density is poly-
The density of ethylene is 0.945g/cm3.Release resin be by styrene chemical modification polyvinyl (Mitsubishi Chemical produce,
The trade mark is W200P).
Adhesion coating uses methyl methacrylate-butyl acrylate-methyl methacrylate segmented copolymer, and density is
1.08g/cm3, melt index 3.5g/10min.
Comparative example 1
Surface layer uses Ethylene-Propylene Block Copolymer, and high density polyethylene (HDPE) and release resin are with 75%:15%:10% ratio
Example compounds.The density of Ethylene-Propylene Block Copolymer is 0.91g/cm3, melt index 4.0g/10min.High density is poly-
The density of ethylene is 0.945g/cm3.Release resin be by styrene chemical modification polyvinyl (Mitsubishi Chemical produce,
The trade mark is W200P).
Sandwich layer uses the Ethylene-Propylene Block Copolymer of weight percent 100%, density 0.90g/cm3, melting refers to
Number is 5.0g/10min.
Adhesion coating is using high viscous SEBS thermoplastic elastomer (TPE), density 0.95g/cm3, melt index 14.5g/10min.
Comparative example 2
Surface layer uses Ethylene-Propylene Block Copolymer, and high density polyethylene (HDPE) and release resin are with 75%:15%:10% ratio
Example compounds.The density of Ethylene-Propylene Block Copolymer is 0.90g/cm3, melt index 9.0g/10min.High density is poly-
The density of ethylene is 0.963g/cm3.Release resin be by styrene chemical modification polyvinyl (Mitsubishi Chemical produce,
The trade mark is W200P).
Sandwich layer uses the Ethylene-Propylene Block Copolymer of weight percent 100%, density 0.90g/cm3, melting refers to
Number is 5.0g/10min.
Adhesion coating is using high viscous SEBS thermoplastic elastomer (TPE), density 0.94g/cm3, melt index 4.8g/10min.
Comparative example 3
Surface layer uses the Ethylene-Propylene Block Copolymer of weight percent 100%, density 0.90g/cm3, melting refers to
Number is 9.0g/10min.
Sandwich layer uses the Ethylene-Propylene Block Copolymer of weight percent 100%, density 0.90g/cm3, melting refers to
Number is 5.0g/10min.
Adhesion coating uses methyl methacrylate-butyl acrylate-methyl methacrylate segmented copolymer, and density is
1.08g/cm3, melt index 3.5g/10min.
The formula on the surface layer of obtained protective film is as shown in table 1, and main performance testing results are as shown in table 2, and residue glue is surveyed
Test result is as shown in table 3.
The formula on the surface layer for the protective film that table 1 1-9 of the embodiment of the present invention and comparative example 1-3 are provided
The main performance testing results for the protective film that table 2 1-9 of the embodiment of the present invention and comparative example 1-3 are provided
The residue glue test result for the protective film that table 3 1-9 of the embodiment of the present invention and comparative example 1-3 are provided
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| ○ | ○ | △ | ○ | ○ | △ |
| Embodiment 7 | Embodiment 8 | Embodiment 9 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| ○ | △ | ○ | × | × | ○ |
By comparing comparative example and embodiment, as can be seen from the test results, acrylic block provided by the invention is total
The stable sex expression of polymers adhesion coating scheme adhesion strength on PMMA plate is preferable, smaller with the variation of temperature and time.Wherein, embodiment
The comprehensive performance of 4,5,9 protective films provided is more preferable: adhesion strength is higher, close to the adhesion strength of even higher than high viscous SEBS, uncoiling
The problems such as power is lower, and there is no residue glues.By comparative example 3 as can be seen that high gluing low uncoiling the present invention also provides a kind of
Scheme optimizes surface layer each component, and lower uncoiling power may be implemented.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.
Claims (10)
1. a kind of novel high viscous protective film, which is characterized in that the high viscous protective film successively includes surface layer, sandwich layer and adhesion coating,
In, the surface layer includes Ethylene-Propylene Block Copolymer 55-80%, high density polyethylene (HDPE) 0%-30%, release resin 0%-
20%, the percentage composition is weight percentage.
2. novel high viscous protective film according to claim 1, which is characterized in that the high density polyethylene (HDPE) and release resin
Total amount be 20%-45%.
3. novel high viscous protective film according to claim 1, which is characterized in that the ethylene-propylene blocks on the surface layer are total
The density of polymers is in 0.90-0.91g/cm3Between, melt index is between 4.0-9.0g/10min.
4. novel high viscous protective film according to claim 1, which is characterized in that the surface layer includes ethylene-propylene blocks
Copolymer 55-72%, high density polyethylene (HDPE) 25%-30%, release resin 3%-15%, the percentage composition contain for weight percent
Amount.
5. novel high viscous protective film according to claim 4, which is characterized in that the high density polyethylene (HDPE) and release resin
Total amount be 28%-45%.
6. novel high viscous protective film according to claim 1, which is characterized in that the high density polyethylene (HDPE) tree in the surface layer
The density of rouge is in 0.945-0.963g/cm3Between, melt index is between 4.0-9.0g/10min.
7. novel high viscous protective film according to claim 1, which is characterized in that the sandwich layer is selected from acrylic resin, institute
Stating acrylic resin is Ethylene-Propylene Block Copolymer.
8. novel high viscous protective film according to claim 1, which is characterized in that the adhesion coating is acrylic block copolymerization
Object.
9. novel high viscous protective film according to claim 8, which is characterized in that the acrylic block of the adhesion coating is copolymerized
Object is methyl methacrylate-butyl acrylate-methyl methacrylate segmented copolymer.
10. a kind of preparation method of novel high viscous protective film described in one of -9 according to claim 1, which is characterized in that described
The viscous protective film of height is prepared in a manner of three-layer co-extruded curtain coating.
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| CN201811568836.6A CN109868080B (en) | 2018-12-21 | 2018-12-21 | Novel high-viscosity protective film and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111440577A (en) * | 2019-10-24 | 2020-07-24 | 宁波激智科技股份有限公司 | Adhesive resin composition, protective film and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN109868080B (en) | 2021-10-22 |
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