CN108690516A - A kind of protective film of curved surface elements and preparation method thereof - Google Patents
A kind of protective film of curved surface elements and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/02—Polyureas
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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
- C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
- C09J2301/162—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer the carrier being a laminate constituted by plastic layers only
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- 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
- C09J2433/00—Presence of (meth)acrylic polymer
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2475/00—Presence of polyurethane
- C09J2475/006—Presence of polyurethane in the substrate
Abstract
The invention belongs to protective film fields; disclose a kind of protective film of curved surface elements; it is followed successively by the first macromolecule resin mixed layer, the second macromolecule resin mixed layer, adhesive layer, release film from top to bottom, according to parts by weight, the group of the first macromolecule resin mixed layer becomes:20~30 parts of TPU, 6~10 parts of fillers, 5~10 parts of anti-wear agents, 2~4 parts of dispersants, 4~8 parts of antistatic agents, 0.2~0.5 part of levelling agent;The group of the second macromolecule resin mixed layer becomes:15~25 parts of TPU, 2~5 parts of fillers, 1~2 part of dispersant, 5~8 parts of adhesion promoters, 0.1~0.4 part of wetting agent.The invention also discloses the preparation methods of protective film.The protective film of the present invention can be used in plane and on the display element with curvature, and film is soft, and elongation percentage is high, and protective film is good to curved surface sticking nature, sprawled oriented film and be not easy tension failure deformation;Protective film scraping and wiping resistance performance is good, oil resistant, waterproof and dustproof.
Description
Technical field
The invention belongs to protective film field, the protective film and preparation method thereof of specifically a kind of curved surface elements.
Background technology
Curved-surface display element, which has, to be met human retina radian, promotes user's visual experience, provides user's screen letter
The added values such as privacy are ceased, are increasingly welcomed by users.Element surface GPF (General Protection False membrane structure is mainly stratiform on the market
Bonding structure, substrate layer select the plastic films such as PET, PMMA, PC, are bonded layer of silica gel, TPU layer or acrylic acid coatings up and down,
Film surface hardens, is antifouling again, anti-dazzle light processing.GPF (General Protection False film can be applicable in plane protection, but general light
Sticking nature is general on micro- curved-surface display element, and curl is susceptible to arch and sticks up after fitting, it is difficult to meet customer need.
Display element protective film mainly has PET materials protective film, AR materials protective film, the protection of OCA materials on existing market
Film.PET material protective films are more commonly used on the market, and PET materials are relatively stiffening, have certain scratch resistance, but due to its hardness compared with
Height is not suitable for cambered surface situation.AR material protective film soft textures, surface, which may be processed, reaches high rigidity and anti-glare effect
Fruit, but it is three-decker, middle layer PET, is usually applicable only to plane and slight curved surface uses, and price compares PET
Material is expensive.OCA material protective films have high light transmittance, high bonding and peel strength, high temperature resistant, high humility and the light of resistance to UV, generally
It is used in and many transparent film substrates is bonded on glass.
For this reason, it may be necessary to research and develop a kind of novel protective film, curved surface elements are used for, solve to ask more than of the existing technology
Topic.
Invention content
The object of the present invention is to provide a kind of protective films, are applicable in the surface protection of curved surface elements, and scraping and wiping resistance performance is good.
It is a further object of the present invention to provide the preparation methods of the protective film.
One of in order to achieve the above objectives, the present invention uses following technical scheme:
A kind of protective film of curved surface elements is followed successively by the first macromolecule resin mixed layer, the second high score subtree from top to bottom
Fat mixed layer, adhesive layer, release film, according to parts by weight, the group of the first macromolecule resin mixed layer becomes:20~30 parts
TPU, 6~10 parts of fillers, 5~10 parts of anti-wear agents, 2~4 parts of dispersants, 4~8 parts of antistatic agents, 0.2~0.5 part of levelling agent;
The group of the second macromolecule resin mixed layer becomes:15~25 parts of TPU, 2~5 parts of fillers, 1~2 part of dispersant, 5~8 parts
Adhesion promoter, 0.1~0.4 part of wetting agent.
Further, the group of the first macromolecule resin mixed layer becomes:24.4 parts of TPU, 8.54 parts of fillers, 7.21
Part anti-wear agent, 2.44 parts of dispersants, 6.71 parts of antistatic agents, 0.32 part of levelling agent;The second macromolecule resin mixed layer
Group becomes:18.4 parts of TPU, 2.76 parts of fillers, 1.84 parts of dispersants, 6.44 parts of adhesion promoters, 0.29 part of wetting agent.
Further, in the composition of the first macromolecule resin mixed layer, the glass transition temperature of the TPU is 16 DEG C,
Elongation percentage is 120%.
Further, in the composition of the first macromolecule resin mixed layer, the filler is poly- methyl carbamide resin, two
The mass ratio of at least one of silica, aluminium oxide, the material that the material that grain size is 8 μm in filler is 3 μm with grain size is
1.2。
Further, in the composition of the second macromolecule resin mixed layer, the glass transition temperature of the TPU is -10 DEG C,
Elongation percentage is 180%.
Further, in the composition of the second macromolecule resin mixed layer, the filler is poly- methyl carbamide resin, two
The mass ratio of at least one of silica, aluminium oxide, the material that the material that grain size is 8 μm in filler is 3 μm with grain size is
0.9。
Further, the thickness of the first macromolecule resin mixed layer is 40~60 μm;Second macromolecule resin
The thickness of mixed layer is 20~40 μm.
Further, in the composition of the first macromolecule resin mixed layer, the mass ratio W1 of filler and TPU are 0.25
~0.5, optimal is 0.35;In the composition of the second macromolecule resin mixed layer, the mass ratio W2 of filler and TPU are
0.005~0.25, optimal is 0.15.It is required that W1>W2 makes spreading force when bending effectively be disperseed, and is conducive to protective film fitting
The application of bigger flexure plane.
Wherein, film-grade TPU resins have preferable film clarity, and low-temperature flexibility shock resistance, tearing strength is high, and have
There are good oil resistant and antiwear characteristic, film is strong for the docile ability of curved surface, and surface waterproofing, and resistance to greasy dirt, surface scratches can
Reach selfreparing.Filler is organic resin close to spherical shape, improves coating integral hardness, and curved-surface display original paper is used for a long time
The high-temperature condition of generation has good adaptability, keeps protective film soft and does not return viscous.First macromolecule resin mixed layer is added
Anti-wear agent, anti-wear agent Ping Junlijing <5 μm, material surface friction coefficient can be reduced, reduces the cut for touching and generating, improves and protects
Cuticula wearability.Protective film surface layer is contacted with air, and antistatic agent, density 1.23g/m are added in formula2, sheet resistance reaches
To 107~108, reduction protective film surface electrostatic dust suction causes dirty.Dispersant keeps filler evenly dispersed, and coating does not generate floating
Color or floating.Levelling agent reinforces wetting levelability when coating coating.
Second macromolecule resin mixed layer contacts with each other with the first macromolecule resin mixed layer, adhesive layer, and adhesive force is added
Accelerating agent promotes the interaction force of each interlayer, makes to consolidate between protection film layer and does not detach.Wetting agent keeps the second macromolecule resin mixed
Closing the material of layer can uniformly spread on the first macromolecule resin mixed layer.
Further, the adhesive layer be acrylic system, silica gel system or polyurethane system pressure-sensitive adhesive layer, thickness is
0.5~20 μm.
Further, the release film is transparent or milky white PET film, and thickness is 10~35 μm.
First macromolecule resin mixed layer, the second macromolecule resin mixed layer can be adhered to for two layers release by adhesive layer
Film, it is former that the first macromolecule resin mixed layer, the second macromolecule resin mixed layer and adhesive layer can be adhered to display by release film
On part.
A kind of preparation method of above-mentioned protective film, includes the following steps:
S1, the first macromolecule resin mixed layer glue is prepared:Under stirring condition, dispersant, filler are added into solvent,
TPU micelles are added after dispersion stirring, anti-wear agent, antistatic agent, levelling agent, stirring, defoaming, mistake are added after stirring evenly
Filter;
S2, the second macromolecule resin mixed layer glue is prepared:Under stirring condition, dispersant, filler are added into solvent,
TPU micelles are added after dispersion stirring, adhesion promoter, wetting agent, stirring, defoaming, filtering are added after stirring evenly;
S3, coating:First macromolecule resin mixed layer glue, the second macromolecule resin mixed layer glue are coated uniformly on
On transfer clear PET film, wherein the first macromolecule resin mixed layer glue is close to transfer clear PET film, through oven drying,
Cooling, curing;After the layer upper surface coating adhesive layer of release film, oven drying, by the second macromolecule resin mixed layer and glue
It is compound to tie layer to obtain the final product.
Further, the solvent is at least one of ethyl acetate, butanone, DMF.
The invention has the advantages that:
The protective film of the present invention can be used in plane and on the display element with curvature, and use scope is wide, such as curved surface
Display, curved surface mobile phone screen etc., the protective film do not have hard PET construction, are two layers of soft TPU mixed function layers, thin
Film is soft, and elongation percentage is high, by adding filler material, improves the tensile strength of film layer, is highly suitable for curved surface elements and is applicable in, protect
Film is good to curved surface sticking nature, sprawls oriented film and is not easy tension failure deformation.
Protective film scraping and wiping resistance performance is good, and film surface adds small particle wear-resistance microspheres, for the pressure that is generated when touch screen and
Scratch automatic absorption and can restore, and select the TPU of particular glass temperature and elongation percentage, can avoid injurious surface mark and generate, and
Has the effect of injurious surface mark self-regeneration.
Protective film softness, oil resistant, waterproof and dustproof, environmental protection.Relative to PET film, the low temperature pliability of TPU is more preferable, film
Resistance to greasy dirt, long term high temperature heat ageing is degradable, free from environmental pollution.
Protective film sticking nature is good.Soft film layer is adhered well to by acrylate pressure sensitive adhesive on required protection curved surface,
It is high to be bonded fastness, does not fall off, does not warp.
Specific implementation mode
With reference to specific embodiment, the present invention is described further.
In following embodiment, number refers both to parts by weight;Dispersant is municipal up to resin Co., Ltd, model LD purchased from Yangzhou
28, keep filler evenly dispersed, coating does not generate loose colour or floating.
Filler (poly- methyl carbamide resin) is purchased from Beijing skill Development Co., Ltd of Tian Heng Rehabilitation, model M3, M6, Ke Yiti
High coating integral hardness, curved-surface display original paper is used for a long time the high-temperature condition generated has good adaptability, makes protective film
It is soft and do not return viscous;The material that the material that grain size is 8 μm in the filler of first macromolecule resin mixed layer is 3 μm with grain size
Mass ratio is 1.2, the material that the material that grain size is 8 μm in the filler of the second macromolecule resin mixed layer is 3 μm with grain size
Mass ratio is 0.9, is conducive to the promotion of coating suppleness, improves the tensile strength of coating, make protective film stretch be bonded when not
It is easy to break deformation.
TPU is coating grade purchased from Bayer Bitterfeld GmbH, German BASF or Lu Borun, yellowing resistance 3 years or more, high for first
The glass transition temperature of the TPU of molecule resin mixed layer is 16 DEG C, and elongation percentage 120% is used for the second macromolecule resin mixed layer
TPU glass transition temperature be -10 DEG C, elongation percentage 180%, film-grade TPU resins have preferable film clarity, low temperature
Flexible shock resistance, tearing strength is high, and has good oil resistant and antiwear characteristic, and film is strong for the docile ability of curved surface, and
Surface waterproofing, resistance to greasy dirt, surface scratches can reach selfreparing, the TPU glass transition temperatures of the second macromolecule resin mixed layer are lower,
Elongation percentage bigger is conducive to increase bend ductility when film patch screen.
Anti-wear agent is purchased from Shanghai Di Run Chemical Co., Ltd.s, model LUBDE 305, solid content 98.5%, average grain
Jing <5 μm, material surface friction coefficient can be reduced, improves protective film wearability, reduces the cut for touching and generating;Antistatic agent is purchased
From Guangdong Fan Tian Science and Technology Ltd.s, model FT-107, density 1.23g/m2, be conducive to anti-quiet dose it is miscible on protective film surface layer
Property is good, does not migrate, protective film is made to be not in surface oil skating sense, sheet resistance reaches 107~108, it is quiet to reduce protection film surface
Electric dust suction causes dirty, and it is clean to be conducive to protective film holding surface;Levelling agent is BYK-320, and solid content 52% reinforces coating
Wetting levelability when coating;Adhesion promoter is purchased from Dow corning, model Dow corning, Z-6040/
OFS6040 promotes the interaction force of each interlayer, makes to consolidate between protection film layer and does not detach;Wetting agent is DISPERBYK-2150,
Solid content is 52%, and the material of the second macromolecule resin mixed layer is enable uniformly to spread over the first macromolecule resin mixed layer
On.
Embodiment 1
The protective film of curved surface elements is followed successively by the first macromolecule resin mixed layer, thickness that thickness is 50 μm from top to bottom
The second macromolecule resin mixed layer, the adhesive layer that thickness is 10 μm, thickness for 30 μm are 20 μm of release films, the first high score subtree
The group of fat mixed layer becomes:24.4 parts of TPU, 8.54 parts of fillers (poly- methyl carbamide resin), 7.21 parts of anti-wear agents, 2.44 parts of dispersions
Agent, 6.71 parts of antistatic agents, 0.32 part of levelling agent;The group of second macromolecule resin mixed layer becomes:18.4 parts of TPU, 2.76 parts
Filler (poly- methyl carbamide resin), 1.84 parts of dispersants, 6.44 parts of adhesion promoters, 0.29 part of wetting agent.Adhesive layer is third
Olefin(e) acid system pressure-sensitive adhesive layer, release film are clear PET film.
Protective film is prepared according to the following steps:
1, the first macromolecule resin mixed layer glue is prepared:Good various raw materials are weighed in proportion, and second is added in glue pot
Acetoacetic ester, opens stirring, and rotating speed 400r/min sequentially adds dispersant, filler and delays while stirring after 20min is stirred in dispersion
It is slow that TPU micelles are added, it adds rotating speed and is adjusted to 600r/min, stir 30min, add anti-wear agent, antistatic agent, levelling agent, stir
15min is mixed, defoaming 30min is vacuumized, the filtering of 300 mesh filter screens is for use;
2, the second macromolecule resin mixed layer glue is prepared:Good various raw materials are weighed in proportion, and second is added in glue pot
Acetoacetic ester, opens stirring, and rotating speed 400r/min sequentially adds dispersant, filler and delays while stirring after 20min is stirred in dispersion
It is slow that TPU micelles are added, it adds rotating speed and is adjusted to 600r/min, stir 30min, add adhesion promoter, wetting agent, stir
15min, vacuumizes defoaming 30min, and the filtering of 300 mesh filter screens is for use;
3, it is coated with:Using the double-deck extrusion coated device simultaneously by the first macromolecule resin mixed layer glue, the second macromolecule
Resin mixed layer glue is coated uniformly on transfer clear PET film, wherein the first macromolecule resin mixed layer glue is in
Turn clear PET film, the second macromolecule resin mixed layer is on the first macromolecule resin mixed layer.First macromolecule resin is mixed
Close the wet glue 120g/m of layer2, the wet glue 100g/m of the second macromolecule resin mixed layer2, pass through 60~140 DEG C of oven dryings, coating machine speed
25m/min enters winding, material suspension curing 4h after back segment cooling.Material after curing enters coating compound working procedure, release
The layer upper surface of film passes through No. 100 bars or comma scraper even spread adhesive layer, the wet glue 65g/m of adhesive layer glue2, pass through 75
Curing material and the adhesive layer progress of~100 DEG C of oven dryings, coating machine speed 95m/min, macromolecule resin mixed layer are compound, the
Two macromolecule resin mixed layers contact with each other with adhesive layer, and transfer clear PET film automatic waste discharge before winding is wound.
Embodiment 2
The protective film of curved surface elements is followed successively by the first macromolecule resin mixed layer, thickness that thickness is 42 μm from top to bottom
The second macromolecule resin mixed layer, the adhesive layer that thickness is 8 μm, thickness for 35 μm are 12 μm of release films, the first high score subtree
The group of fat mixed layer becomes:20 parts of TPU, 6 parts of fillers (poly- methyl carbamide resin), 5 parts of anti-wear agents, 3 parts of dispersants, 5 parts it is anti-quiet
Electric agent, 0.4 part of levelling agent;The group of second macromolecule resin mixed layer becomes:15 parts of TPU, 2 parts of filler (poly- methylurea trees
Fat), 1 part of dispersant, 7 parts of adhesion promoters, 0.3 part of wetting agent.Adhesive layer is colloidal silica series pressure-sensitive layer, and release film is
Bright PET film.
Protective film is prepared according to the following steps:
1, the first macromolecule resin mixed layer glue is prepared:Good various raw materials are weighed in proportion, and second is added in glue pot
Acetoacetic ester, opens stirring, and rotating speed 500r/min sequentially adds dispersant, filler and delays while stirring after 30min is stirred in dispersion
It is slow that TPU micelles are added, it adds rotating speed and is adjusted to 500r/min, stir 20min, add anti-wear agent, antistatic agent, levelling agent, stir
20min is mixed, defoaming 30min is vacuumized, the filtering of 300 mesh filter screens is for use;
2, the second macromolecule resin mixed layer glue is prepared:Good various raw materials are weighed in proportion, and second is added in glue pot
Acetoacetic ester, opens stirring, and rotating speed 500r/min sequentially adds dispersant, filler and delays while stirring after 25min is stirred in dispersion
It is slow that TPU micelles are added, it adds rotating speed and is adjusted to 700r/min, stir 20min, add adhesion promoter, wetting agent, stir
20min, vacuumizes defoaming 30min, and the filtering of 300 mesh filter screens is for use;
3, it is coated with:Using the double-deck extrusion coated device simultaneously by the first macromolecule resin mixed layer glue, the second macromolecule
Resin mixed layer glue is coated uniformly on transfer clear PET film, wherein the first macromolecule resin mixed layer glue is in
Turn clear PET film, the second macromolecule resin mixed layer is on the first macromolecule resin mixed layer.First macromolecule resin is mixed
Close the wet glue 120g/m of layer2, the wet glue 100g/m of the second macromolecule resin mixed layer2, pass through 60~140 DEG C of oven dryings, coating machine speed
25m/min enters winding, material suspension curing 4h after back segment cooling.Material after curing enters coating compound working procedure, release
The layer upper surface of film passes through No. 100 bars or comma scraper even spread adhesive layer, the wet glue 65g/m of adhesive layer glue2, pass through 75
Curing material and the adhesive layer progress of~100 DEG C of oven dryings, coating machine speed 95m/min, macromolecule resin mixed layer are compound, the
Two macromolecule resin mixed layers contact with each other with adhesive layer, and transfer clear PET film automatic waste discharge before winding is wound.
Embodiment 3
The protective film of curved surface elements is followed successively by the first macromolecule resin mixed layer, thickness that thickness is 60 μm from top to bottom
The second macromolecule resin mixed layer, the adhesive layer that thickness is 15 μm, thickness for 24 μm are 30 μm of release films, the first high score subtree
The group of fat mixed layer becomes:30 parts of TPU, 10 parts of fillers (silica), 10 parts of anti-wear agents, 4 parts of dispersants, 8 parts it is antistatic
Agent, 0.5 part of levelling agent;The group of second macromolecule resin mixed layer becomes:25 parts of TPU, 5 parts of fillers (silica), 2 parts points
Powder, 5 parts of adhesion promoters, 0.1 part of wetting agent.Adhesive layer is polyurethane system pressure-sensitive adhesive layer, and release film is that milky white PET is thin
Film.
Protective film is prepared according to the following steps:
1, the first macromolecule resin mixed layer glue is prepared:Good various raw materials are weighed in proportion, and fourth is added in glue pot
Ketone, unlatching stirring, rotating speed 300r/min sequentially add dispersant, filler, after 25min is stirred in dispersion, slowly add while stirring
Enter TPU micelles, adds rotating speed and be adjusted to 800r/min, stir 15min, add anti-wear agent, antistatic agent, levelling agent, stir
10min, vacuumizes defoaming 25min, and the filtering of 300 mesh filter screens is for use;
2, the second macromolecule resin mixed layer glue is prepared:Good various raw materials are weighed in proportion, and fourth is added in glue pot
Ketone, unlatching stirring, rotating speed 300r/min sequentially add dispersant, filler, after 25min is stirred in dispersion, slowly add while stirring
Enter TPU micelles, add rotating speed and be adjusted to 500r/min, stir 25min, add adhesion promoter, wetting agent, stir 10min,
Defoaming 30min is vacuumized, the filtering of 300 mesh filter screens is for use;
3, it is coated with:Using the double-deck extrusion coated device simultaneously by the first macromolecule resin mixed layer glue, the second macromolecule
Resin mixed layer glue is coated uniformly on transfer clear PET film, wherein the first macromolecule resin mixed layer glue is in
Turn clear PET film, the second macromolecule resin mixed layer is on the first macromolecule resin mixed layer.First macromolecule resin is mixed
Close the wet glue 120g/m of layer2, the wet glue 100g/m of the second macromolecule resin mixed layer2, pass through 60~140 DEG C of oven dryings, coating machine speed
25m/min enters winding, material suspension curing 4h after back segment cooling.Material after curing enters coating compound working procedure, release
The layer upper surface of film passes through No. 100 bars or comma scraper even spread adhesive layer, the wet glue 65g/m of adhesive layer glue2, pass through 75
Curing material and the adhesive layer progress of~100 DEG C of oven dryings, coating machine speed 95m/min, macromolecule resin mixed layer are compound, the
Two macromolecule resin mixed layers contact with each other with adhesive layer, and transfer clear PET film automatic waste discharge before winding is wound.
Embodiment 4
The protective film of curved surface elements is followed successively by the first macromolecule resin mixed layer, thickness that thickness is 45 μm from top to bottom
The second macromolecule resin mixed layer, the adhesive layer that thickness is 18 μm, thickness for 32 μm are 15 μm of release films, the first high score subtree
The group of fat mixed layer becomes:16 parts of TPU, 8 parts of fillers (aluminium oxide), 7 parts of anti-wear agents, 2 parts of dispersants, 4 parts of antistatic agents,
0.2 part of levelling agent;The group of second macromolecule resin mixed layer becomes:22 parts of TPU, 4 parts of fillers (aluminium oxide), 1.5 parts of dispersions
Agent, 8 parts of adhesion promoters, 0.4 part of wetting agent.Adhesive layer is acrylic system pressure-sensitive adhesive layer, and release film is that transparent PET is thin
Film.
Protective film is prepared according to the following steps:
1, the first macromolecule resin mixed layer glue is prepared:Good various raw materials are weighed in proportion, and N is added in glue pot,
Dinethylformamide opens stirring, and rotating speed 400r/min sequentially adds dispersant, filler, after 25min is stirred in dispersion, side
Stirring side is slowly added to TPU micelles, adds rotating speed and is adjusted to 500r/min, stirs 25min, add anti-wear agent, antistatic agent, stream
20min is stirred in flat agent, vacuumizes defoaming 30min, and the filtering of 300 mesh filter screens is for use;
2, the second macromolecule resin mixed layer glue is prepared:Good various raw materials are weighed in proportion, and N is added in glue pot,
Dinethylformamide opens stirring, and rotating speed 500r/min sequentially adds dispersant, filler, after 20min is stirred in dispersion, side
Stirring side is slowly added to TPU micelles, adds rotating speed and is adjusted to 600r/min, stirs 20min, adds adhesion promoter, wetting
15min is stirred in agent, vacuumizes defoaming 30min, and the filtering of 300 mesh filter screens is for use;
3, it is coated with:Using the double-deck extrusion coated device simultaneously by the first macromolecule resin mixed layer glue, the second macromolecule
Resin mixed layer glue is coated uniformly on transfer clear PET film, wherein the first macromolecule resin mixed layer glue is in
Turn clear PET film, the second macromolecule resin mixed layer is on the first macromolecule resin mixed layer.First macromolecule resin is mixed
Close the wet glue 120g/m of layer2, the wet glue 100g/m of the second macromolecule resin mixed layer2, pass through 60~140 DEG C of oven dryings, coating machine speed
25m/min enters winding, material suspension curing 4h after back segment cooling.Material after curing enters coating compound working procedure, release
The layer upper surface of film passes through No. 100 bars or comma scraper even spread adhesive layer, the wet glue 65g/m of adhesive layer glue2, pass through 75
Curing material and the adhesive layer progress of~100 DEG C of oven dryings, coating machine speed 95m/min, macromolecule resin mixed layer are compound, the
Two macromolecule resin mixed layers contact with each other with adhesive layer, and transfer clear PET film automatic waste discharge before winding is wound.
Performance test
Curved surface sticking nature is tested:The glass marble of a diameter of 15cm, glass spherical surface is taken to be labeled with a 15cm2Square marks, will
Protective film fits to glass spherical surface, observes 15cm2The variation of mark material, the good protective film of sticking nature, label whole face accumulate energy
It is enough bonded corrugationless, the protective film of sticking nature difference, label area cannot be completely bonded, and protective film has fold or protective film very
It is easy to bounce not docile.
Oil resistivity is tested:The material for removing adhesive linkage is cut into 100*100mm squares, initial volume V1 is recorded, by material
Material puts toluene solution into, and naturally dry, volume V2 after test is impregnated are taken out after soak at room temperature 72h, and expansion rate is (V2-V1)/V1,
Expansion rate is lower, and oil resistivity is better.
Conclusion:
1, the protective film of Examples 1 to 4 is compared with commercially available PE protective films, PET protection film, Examples 1 to 4 in terms of main material
TPU materials, PE protective films PE materials be flexible material, PET material is compared to stiffening.
2, the protective film of Examples 1 to 4 is higher than commercially available PE protective films, PET protection film transmitance, and mist degree is protected than commercially available PE
Film, PET protection film are low, can reduce influence of the protective film to protected object clarity in this way.
3, the combination layer fracture strength, combination layer tensile strength of the protective film of Examples 1 to 4 all than commercially available PE protective films,
PET protection film is high, and material is not easy stretcher strain.
4, the peeling force of adhesive layer peel test force, the protective film of Examples 1 to 4 is 16.5~17N/inch, is protected than PE
Cuticula, the peeling force of PET protection film are high, and bonding glue caking property is strong, is not readily disengaged from after bonding.
5, curved surface sticking nature is tested, and the protective film of Examples 1 to 4 is bonded corrugationless, and PE protective films, PET protection film then can
Corrugation.
6, self-repairability is tested, and the protective film of Examples 1 to 4 can restore rapidly, and PE protective films, PET protection film scratch are not
It can restore.
7, material is placed 7 days naturally, the protective film surface layer cleaning of Examples 1 to 4, transparent, PE protective films and PET protection film
Surface layer is covered with one layer of shallow dust.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Belong to those skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in all are answered
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of protective film of curved surface elements, which is characterized in that be followed successively by the first macromolecule resin mixed layer, second from top to bottom
Macromolecule resin mixed layer, adhesive layer, release film, according to parts by weight, the group of the first macromolecule resin mixed layer becomes:
20~30 parts of TPU, 6~10 parts of fillers, 5~10 parts of anti-wear agents, 2~4 parts of dispersants, 4~8 parts of antistatic agents, 0.2~0.5
Part levelling agent;The group of the second macromolecule resin mixed layer becomes:15~25 parts of TPU, 2~5 parts of fillers, 1~2 part of dispersion
Agent, 5~8 parts of adhesion promoters, 0.1~0.4 part of wetting agent.
2. protective film according to claim 1, which is characterized in that in the composition of the first macromolecule resin mixed layer,
The glass transition temperature of the TPU is 16 DEG C, elongation percentage 120%.
3. protective film according to claim 1, which is characterized in that in the composition of the first macromolecule resin mixed layer,
The filler is at least one of poly- methyl carbamide resin, silica, aluminium oxide, the material that grain size is 8 μm in filler
The mass ratio for the material for being 3 μm with grain size is 1.2.
4. protective film according to claim 1, which is characterized in that in the composition of the second macromolecule resin mixed layer,
The glass transition temperature of the TPU is -10 DEG C, elongation percentage 180%.
5. protective film according to claim 1, which is characterized in that in the composition of the second macromolecule resin mixed layer,
The filler is at least one of poly- methyl carbamide resin, silica, aluminium oxide, the material that grain size is 8 μm in filler
The mass ratio for the material for being 3 μm with grain size is 0.9.
6. protective film according to claim 1, which is characterized in that the thickness of the first macromolecule resin mixed layer is 40
~60 μm;The thickness of the second macromolecule resin mixed layer is 20~40 μm.
7. protective film according to claim 1, which is characterized in that in the composition of the first macromolecule resin mixed layer,
The mass ratio of filler and TPU are 0.25~0.5;In the composition of the second macromolecule resin mixed layer, filler and TPU's
Mass ratio is 0.005~0.25.
8. protective film according to claim 1, which is characterized in that the adhesive layer be acrylic system, silica gel system or
The pressure-sensitive adhesive layer of polyurethane system, thickness are 0.5~20 μm.
9. protective film according to claim 1, which is characterized in that the release film is transparent or milky white PET film, thick
Degree is 10~35 μm.
10. a kind of preparation method of protective film as described in any one of claim 1 to 9, which is characterized in that including following step
Suddenly:
S1, the first macromolecule resin mixed layer glue is prepared:Under stirring condition, dispersant, filler, dispersion are added into solvent
TPU micelles are added after stirring, anti-wear agent, antistatic agent, levelling agent, stirring, defoaming, filtering are added after stirring evenly;
S2, the second macromolecule resin mixed layer glue is prepared:Under stirring condition, dispersant, filler, dispersion are added into solvent
TPU micelles are added after stirring, adhesion promoter, wetting agent, stirring, defoaming, filtering are added after stirring evenly;
S3, coating:First macromolecule resin mixed layer glue, the second macromolecule resin mixed layer glue are coated uniformly on transfer
On clear PET film, wherein the first macromolecule resin mixed layer glue is close to transfer clear PET film, through oven drying, cold
But it, cures;After the layer upper surface coating adhesive layer of release film, oven drying, by the second macromolecule resin mixed layer and bonding
Layer is compound to obtain the final product.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110079233A (en) * | 2019-05-24 | 2019-08-02 | 深圳昌茂粘胶新材料有限公司 | A kind of glass processing process protective film and preparation method thereof that can directly cut |
| CN110978694A (en) * | 2019-12-17 | 2020-04-10 | 浙江德斯泰新材料股份有限公司 | Color functional PVB composite film and preparation method thereof |
| CN111073261A (en) * | 2019-12-26 | 2020-04-28 | 南通纳科达聚氨酯科技有限公司 | Flexible curved surface display screen protection film TPU base film |
| CN111909625A (en) * | 2020-08-13 | 2020-11-10 | 业成科技（成都）有限公司 | Protective film, curved surface structure and protective film attaching method |
| CN113201158A (en) * | 2021-04-29 | 2021-08-03 | 江西昊泽光学膜科技有限公司 | TPU protective film, TPU base film and preparation method thereof |
| WO2021213113A1 (en) * | 2020-04-23 | 2021-10-28 | 广东邦固薄膜涂料创新研究院有限公司 | Self-repairing tpu protective film for 3d curved screen and preparation method therefor |
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| CN110079233A (en) * | 2019-05-24 | 2019-08-02 | 深圳昌茂粘胶新材料有限公司 | A kind of glass processing process protective film and preparation method thereof that can directly cut |
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| CN108690516B (en) | 2021-06-22 |
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