CN115368838A - Color changing film - Google Patents
Color changing film Download PDFInfo
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- CN115368838A CN115368838A CN202210950820.1A CN202210950820A CN115368838A CN 115368838 A CN115368838 A CN 115368838A CN 202210950820 A CN202210950820 A CN 202210950820A CN 115368838 A CN115368838 A CN 115368838A
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- color
- layer
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- changing
- adhesive
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- 238000009434 installation Methods 0.000 claims abstract description 13
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- 239000000853 adhesive Substances 0.000 claims description 61
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- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 4
- 229910052739 hydrogen Chemical group 0.000 description 4
- 239000001257 hydrogen Chemical group 0.000 description 4
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 3
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- 238000010276 construction Methods 0.000 description 3
- ZHPNWZCWUUJAJC-UHFFFAOYSA-N fluorosilicon Chemical compound [Si]F ZHPNWZCWUUJAJC-UHFFFAOYSA-N 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- -1 polybutylene adipate Polymers 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
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- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical group NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- OWIKHYCFFJSOEH-UHFFFAOYSA-N Isocyanic acid Chemical compound N=C=O OWIKHYCFFJSOEH-UHFFFAOYSA-N 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 2
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 2
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 2
- 239000012964 benzotriazole Substances 0.000 description 2
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 2
- OWBTYPJTUOEWEK-UHFFFAOYSA-N butane-2,3-diol Chemical compound CC(O)C(C)O OWBTYPJTUOEWEK-UHFFFAOYSA-N 0.000 description 2
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- OEOIWYCWCDBOPA-UHFFFAOYSA-N 6-methyl-heptanoic acid Chemical compound CC(C)CCCCC(O)=O OEOIWYCWCDBOPA-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- KXBFLNPZHXDQLV-UHFFFAOYSA-N [cyclohexyl(diisocyanato)methyl]cyclohexane Chemical compound C1CCCCC1C(N=C=O)(N=C=O)C1CCCCC1 KXBFLNPZHXDQLV-UHFFFAOYSA-N 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
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- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical group [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
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- 239000004014 plasticizer Substances 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
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- 229920000909 polytetrahydrofuran Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 102220042174 rs141655687 Human genes 0.000 description 1
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- 239000000758 substrate Substances 0.000 description 1
- 230000036561 sun exposure Effects 0.000 description 1
- 125000003698 tetramethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
- ADJMNWKZSCQHPS-UHFFFAOYSA-L zinc;6-methylheptanoate Chemical compound [Zn+2].CC(C)CCCCC([O-])=O.CC(C)CCCCC([O-])=O ADJMNWKZSCQHPS-UHFFFAOYSA-L 0.000 description 1
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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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- 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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/06—Polyurethanes from 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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—Polyurethanes from polyethers
-
- 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
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
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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
- C09J7/40—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
- 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
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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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
Abstract
The invention belongs to the technical field of films, and particularly relates to a color changing film which comprises a release film layer, an installation adhesive layer, a color shielding layer, a color changing layer, a TPU (thermoplastic polyurethane) layer, a stain-resistant self-repairing layer and a protective film layer from top to bottom. The invention solves the problems of easy damage and poor weather resistance of the existing color-changing film, effectively improves the weather resistance and mechanical property by utilizing the stain-resistant self-repairing layer, realizes the self-repairing effect of the color-changing film and prolongs the service life; meanwhile, the materials of each layer are as follows: the installation glue layer, the color shielding layer, the color changing layer, the TPU layer and the stain-resistant self-repairing layer are made of materials which are not easy to yellow and age.
Description
Technical Field
The invention belongs to the technical field of films, and particularly relates to a color-changing film.
Background
With the improvement of living standard, the demand of living quality is continuously raised, and the color changing technology which should be carried has been paid extensive attention based on good color-giving and color-changing performance of the color changing technology. The color changing film is the most common means in the color changing technology, has the advantages of convenient color changing and the like, and is widely used. The current color changing films can be divided into two categories according to the material: PVC color-changing film and TPU color-changing film. PVC changes look membrane and very easily appears the phenomenon of yellowing after using one year, and tensile resilience is poor, and inconvenient pad pasting construction, the inherent plasticizer of PVC material simultaneously precipitate the problem, leads to PVC to change the resistant dirty performance of look membrane poor, the residual gum scheduling problem behind the pad pasting. The TPU color-changing film is formed by adding color mother particles into a TPU substrate to change color, the technology is single in color, the cost can be leveled only by a large production capacity, and the requirement for small-batch individualized color-changing film production is difficult to meet. In view of the above problems, there is a need in the market for a color-changing film having excellent properties.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a color-changing film, which solves the problems of easy damage and poor weather resistance of the existing color-changing film, effectively improves the weather resistance and mechanical property by utilizing a stain-resistant self-repairing layer, realizes the self-repairing effect of the color-changing film, and prolongs the service life.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a color changing film comprises a release film layer, an installation adhesive layer, a color shielding layer, a color changing layer, a TPU layer, a stain-resistant self-repairing layer and a protective film layer from top to bottom.
The release film layer is made of PET silicon release film, and the effect of protecting the installation adhesive layer is achieved.
The mounting adhesive layer adopts high-weather-resistance acrylic adhesive, adopts non-yellowing and plasticizing agent type acrylic pressure-sensitive adhesive, and specifically adopts one of Ashland951055, henkel LOCTITE DURO-TAK8087 and leading NP-59.
The color shielding layer is a white opaque film or a yellow opaque film, which plays a role in shielding the ground color, and the color shielding layer is a fatty acid polycaprolactone type TPU film or a polyvinyl chloride film.
The color changing layer is formed by coating a color changing adhesive on the color shielding layer and drying and curing the color changing adhesive. The color changing adhesive is a polyurethane adhesive containing high-weatherability nano color paste, and the color changing adhesive comprises the following components in percentage by mass: 88-92 parts of polyurethane adhesive and 1-2 parts of metal powder; 4-6 parts of color paste and 3-4 parts of ultraviolet absorbent. The color-changing adhesive is obtained by weighing the components in proportion and then fully and uniformly stirring the components.
In the polyurethane adhesive, M is a mixture of cyanate ester, polyol and a chain extender, and the molar ratio of isocyanic acid (-NCO) to hydroxyl (-OH) in M is 0.9-1.3; in the polyurethane adhesive, the mass ratio of M, catalyst and solvent is 82.04. The polyurethane adhesive is prepared by weighing a catalyst and a solvent and mixing the weighed catalyst and the solvent with M. The water content of the raw materials of the polyurethane adhesive is lower than 0.05%.
The polyurethane adhesive has an adhesion effect in the color changing layer and has excellent resilience, namely, the color changing layer is stretched in the same proportion in the stretching process of the color changing film, and the problems of stretch breaking, whitening and the like can be avoided.
Further, in the polyurethane adhesive, the isocyanate adopts one or more of HDI tripolymer, HDI dipolymer, HDI biuret and IPDI tripolymer; the polyol is one or more of polycarbonate diol and polycaprolactone polyol; the chain extender adopts micromolecular polyalcohol, preferably one of butanediol, neopentyl glycol, trimethylolpropane, monoethylene glycol, ethylene glycol, propylene glycol and methyl propylene glycol; the catalyst adopts one or more of zinc isooctanoate, dibutyltin dilaurate or bismuth isooctanoate; the solvent is one or more of ethyl acetate, butyl acetate and propylene glycol methyl ether acetate (PMA for short).
The metal powder shows a metal light reflecting effect in the color changing layer, and TAP-7606D aluminum paste is adopted as the metal powder, and the material is from Shandong silver arrow metal pigment Co.
The color paste is a nanoscale light-resistant color paste which does not fade, has the particle size D90=100nm, and has the color changing effect in the whole color changing layer. The color paste is different according to different color requirements. Black is carbon black color paste, blue is phthalocyanine blue color paste, red is iron oxide red color paste or pigment red 170 color paste, and yellow is iron oxide yellow color paste or sun-proof yellow color paste.
The ultraviolet absorbent adopts benzotriazole type ultraviolet absorbent or triazine ultraviolet absorbent, and plays a role in resisting ultraviolet aging in the color changing layer. The benzotriazole ultraviolet absorbent adopts one of UV571, UVP and UV328, and the triazine ultraviolet absorbent adopts triazine-5.
The TPU layer adopts a yellowing-resistant fatty acid polycaprolactone type TPU film, such as an SMM301 type TPU film produced by Kayang Zhejiang and an 49510-60DV-AM type TPU film produced by ARGOTEC.
The stain-resistant self-repairing layer is formed by coating self-repairing polyurethane resin, drying and curing. The self-repairing polyurethane resin is prepared from isocyanate and polyol serving as raw materials through a chain extender, a catalyst, an anti-fouling auxiliary agent, a solvent, a weather-resistant material and a wetting auxiliary agent, wherein the molar ratio of isocyanate to hydroxyl of the polyol in the isocyanate is 0.9-1.3, preferably 1.2, the addition amount of the catalyst is 0.01-0.1% of the total amount of the raw materials, and the solid content of the self-repairing polyurethane resin is 30-50%.
Further, in order to ensure that the self-repairing polyurethane resin is not aged or yellowed and meet the requirement of outdoor sun exposure, the isocyanate is one of isophorone diisocyanate, aliphatic polyisocyanate and dicyclohexylmethane diisocyanate; the polyalcohol is one of poly-tetramethyl ether glycol, polycarbonate diol, polypropylene oxide glycol, polybutylene adipate glycol, polyhexamethylene adipate glycol ester glycol and polytetrahydrofuran glycol; the chain extender is micromolecular polyalcohol, preferably one of butanediol, neopentyl glycol, trimethylolpropane, monoethylene glycol, ethylene glycol, propylene glycol and methyl propylene glycol; the catalyst adopts one of dibutyltin dilaurate and stannous octoate; in order to ensure that the self-repairing polyurethane resin has stain resistance, the stain-resistant auxiliary agent adopts organic fluorine silicon, such as KX-501, and the addition amount of the stain-resistant auxiliary agent is 3-5% of the total amount of the raw materials; the solvent adopts ethyl acetate or butyl acetate; the weather-resistant material adopts an ultraviolet absorber UV292, and the wetting auxiliary agent adopts BYK370. The water content of all components of the self-repairing polyurethane resin is required to be lower than 0.05%.
In the self-repairing polyurethane resin, M is a mixture of cyanate ester, polyol and a chain extender, and the molar ratio of isocyanic acid (-NCO) to hydroxyl (-OH) in M is 0.9-1.3, preferably 1.2; in the self-repairing polyurethane resin, M is as follows, wherein the ratio of the catalyst to the antifouling auxiliary agent to the solvent to the weatherable material to the wetting auxiliary agent =82 is as follows, namely, M is from 10 to 12. The self-repairing polyurethane resin can be obtained after weighing according to the proportion.
The protective film layer is made of a PET film or a PET film coated with silicone oil on the surface, and plays a role in protecting the appearance of the stain-resistant self-repairing layer in the production process.
The preparation method of the color changing film comprises the following steps:
And 2, coating a color-changing adhesive on the surface of the color shielding layer, drying the coating at the temperature of 85-120 ℃ for 2-5 minutes, and compounding the coating with the TPU film layer.
and 5, preparing the self-repairing polyurethane resin according to the preparation method of the self-repairing polyurethane resin. The time from the preparation of the self-repairing polyurethane resin to the coating of the self-repairing polyurethane resin is controlled within 4 hours, otherwise, the self-repairing polyurethane resin fails and cannot be used.
Step 6, coating a stain-resistant self-repairing polyurethane coating on the TPU surface of the composite film in the step 4, drying the TPU surface at 85-150 ℃ for 2-5 minutes with the dry glue thickness of 3-15 microns, and then compounding the TPU surface with a protective film;
and 7, placing the composite film obtained in the step 6 at the temperature of 40-80 ℃ for 48-96h, and obtaining the color-changing film after the self-repairing polyurethane resin is fully cured.
Furthermore, the release film layer is made of a PET silicon release film, the release force is 200-400g/25mm, and the PET silicon release film is provided with an air guide groove stamped by a mold. The release film of the air guide groove has the following functions: because there is the unique air guide groove design that the mould impression came out on PET silicon release film surface, simultaneously, in the preparation step 4 of the film that changes the look, after from type membrane and installation glue layer complex, can print out the mesh or cellular sunken line from air guide groove line on the type membrane on the installation glue, then the air guide groove that forms on the installation glue. The depth of the air guide grooves cannot be too large and is at least less than one third of the thickness of dry glue of the mounting glue, the depth of the air guide groove is generally less than 10 mu m, the width of the air guide grooves is 2-3 mu m, and the interval between the air guide grooves is about 0.7-1.2mm. When the construction stage laminating was used, the air was derived to accessible line recess, and the gassing does not produce, and the construction of being convenient for saves time and human cost, and the pad pasting surface is smooth, level and smooth.
From the above description, it can be seen that the present invention has the following advantages:
1. the invention solves the problems of easy damage and poor weather resistance of the existing color-changing film, effectively improves the weather resistance and mechanical property by utilizing the stain-resistant self-repairing layer, realizes the self-repairing effect of the color-changing film and prolongs the service life; meanwhile, the materials of each layer are as follows: the mounting adhesive layer, the color shielding layer, the color changing layer, the TPU layer and the stain-resistant self-repairing layer are all in the formula or the materials are made of materials which are not easy to yellow and age.
2. The self-repairing layer provided by the invention is formed by adding the fluorine-silicon copolymer resin into the polyurethane resin, and the low surface energy characteristic of the fluorine-silicon copolymer resin is continued to the polyurethane coating, so that a good anti-fouling effect is achieved; meanwhile, the resin in the polyurethane has a larger molecular distance, and carbamate and hydrogen bond density among carbamido groups are large, so that the carbamate and the carbamido groups interact with each other through hydrogen bonds, the hydrogen bonds are broken due to extrusion under the stress condition, and when external force disappears, the hydrogen bonds can be combined together again, and scratch repair is realized.
3. The invention adopts a multilayer coating mode to form a color changing film by lamination, and the basic material comprises the following components: the color shielding layer and the TPU layer are conventional materials capable of being produced in batches, the color change of the color changing film can be completed only through the change of the color changing layer, the production is convenient and reliable, and the small-batch multi-color production can be realized.
Drawings
FIG. 1 is a schematic structural diagram of a color-changing film provided by the present invention;
wherein, 1 is a release film layer, 2 is an installation glue layer, 3 is a color shielding layer, 4 is a color changing layer, 5 is a TPU layer, 6 is a stain-resistant self-repairing layer, and 7 is a protective film layer.
Detailed Description
With reference to fig. 1, a specific embodiment of the present invention is described in detail, but the present invention is not limited in any way by the claims.
Example 1
As shown in fig. 1, a color-changing film is composed of a release film layer, an installation glue layer, a color shielding layer, a color-changing layer, a TPU layer, a stain-resistant self-repairing layer and a protective film layer from top to bottom, as shown in the following table:
the preparation method of the color changing film comprises the following steps:
then, weighing according to the following mixture ratio, and fully stirring to prepare the black color-changing adhesive:
and 2, coating a color-changing adhesive on the surface of the color shielding layer, drying at 85 ℃ for 2 minutes, and then compounding with the TPU film layer.
And 3, placing the composite film obtained in the step 2 in a space with the air temperature of 40 ℃ for standing for 48 hours, and entering the next process after the color-changing adhesive is fully cured.
step 6, coating a stain-resistant self-repairing polyurethane coating on the surface of the TPU layer of the composite film in the step 4, drying for 2 minutes at 85 ℃, and then compounding with a protective film;
and 7, placing the composite film obtained in the step 6 at the temperature of 40 ℃ for 48 hours, and obtaining the color-changing film after the self-repairing polyurethane resin is fully cured.
Example 2
The utility model provides a change color film, from top to bottom by shielding the layer, changing the chromatograph, TPU layer, resistant dirty self-repairing layer, protection rete are constituteed from type rete, installation glue film, colour, as shown in the following table:
the preparation method of the color changing film comprises the following steps:
then, weighing according to the following mixture ratio, and fully stirring to prepare the black color-changing adhesive:
and 2, coating a color-changing adhesive on the surface of the color shielding layer, drying at 120 ℃ for 5 minutes, and then compounding with the TPU film layer.
And 3, placing the composite membrane obtained in the step 2 in a space with the air temperature of 60 ℃ for standing for 96 hours, and entering the next process after the color-changing adhesive is fully cured.
step 6, coating a stain-resistant self-repairing polyurethane coating on the TPU layer surface of the composite film in the step 4, drying for 5 minutes at 150 ℃, and then compounding with a protective film;
and 7, placing the composite film obtained in the step 6 at the temperature of 80 ℃ for 96 hours, and obtaining the color-changing film after the self-repairing polyurethane resin is fully cured.
Example 3
The utility model provides a change color film, from top to bottom by shielding the layer, changing the chromatograph, TPU layer, resistant dirty self-repairing layer, protection rete are constituteed from type rete, installation glue film, colour, as shown in the following table:
the preparation method of the color changing film comprises the following steps:
then, weighing according to the following mixture ratio, and fully stirring to prepare the black color-changing adhesive:
and 2, coating a color-changing adhesive on the surface of the color shielding layer, drying for 4 minutes at 110 ℃, and then compounding with the TPU film layer.
step 6, coating a stain-resistant self-repairing polyurethane coating on the surface of the TPU layer of the composite film in the step 4, drying for 5 minutes at 120 ℃, and then compounding with a protective film;
and 7, placing the composite film obtained in the step 6 at the temperature of 60 ℃ for 72 hours, and obtaining the color-changing film after the self-repairing polyurethane resin is fully cured.
Performance detection
The products of examples 1 to 3 were used as test examples and tested according to the following requirements:
and (3) anti-pollution test: the chenguang shuangjie marker was graffiti, and after 3 minutes, it was wiped with a paper towel.
And (6) QUV aging: ASTM G153, 2000 hours or more, and Delta E2.0 or less
Scratch repair: and brushing non-penetrating scratches on the surface of the self-repairing layer by using a copper brush, and washing by using water with different temperatures to see whether the scratches can be repaired or not.
Elongation at Break ASTM D638-10
Chemical solvent resistance ASTM D7244, ASTM D6279 n-heptane, hexane, toluene, isopropanol
The stone breaking resistance performance is as follows: SAE J400
The test results are given in the following table:
| example 1 | Example 2 | Example 3 | |
| Colour(s) | Black color | Red colour | Blue color |
| Resistance to soiling | Can be wiped off | Can be wiped off | Can be wiped off |
| Scratch repairability | Can be repaired after being washed by water at 60 DEG C | Can be repaired after being washed by water at 60 DEG C | Can be repaired after being washed by water at 60 DEG C |
| QUV aging test | By passing | By passing | By passing |
| Elongation at break | 90％ | 90％ | 100％ |
| Resistance to chemical solvents | By passing | By passing | By passing |
| Resistance to crushing stone | By passing | By passing | By passing |
Example 4
The utility model provides a change color film, from top to bottom by shielding the layer, changing the chromatograph, TPU layer, resistant dirty self-repairing layer, protection rete are constituteed from type rete, installation glue film, colour, as shown in the following table:
the preparation method of the color changing film comprises the following steps:
then, weighing according to the mixture ratio of the following table, and fully stirring to prepare the black color-changed adhesive:
and 2, coating a color-changing adhesive on the surface of the color shielding layer, drying for 4 minutes at 110 ℃, and then compounding with the TPU film layer.
step 6, coating a stain-resistant self-repairing polyurethane coating on the surface of the TPU layer of the composite film in the step 4, drying for 5 minutes at 120 ℃, and then compounding with a protective film;
and 7, placing the composite film obtained in the step 6 at the temperature of 60 ℃ for 72 hours, and obtaining the color-changing film after the self-repairing polyurethane resin is fully cured.
Comparison experiment
| Example 3 | Example 4 | |
| Colour(s) | Blue color | Blue color |
| Resistance to soiling | Can be wiped off | Can be wiped off |
| Scratch repairability | Can be repaired after being washed by water at 60 DEG C | Can be repaired after being washed by water at 60 DEG C |
| QUV aging test | By passing | By passing |
| Elongation at break | 100％ | 100％ |
| Resistance to chemical solvents | By passing | By passing |
| Resistance to crushing stone | By passing | By passing |
The comparison shows that the arrangement of the air guide groove does not influence the use of the color changing film, and the good stain resistance and repairability are still maintained.
It should be understood that the detailed description of the invention is merely illustrative of the invention and is not intended to limit the invention to the specific embodiments described. It will be appreciated by those skilled in the art that the present invention may be modified or substituted equally as well to achieve the same technical result; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (10)
1. A color changing film is characterized in that: the color changing film consists of a release film layer, an installation adhesive layer, a color shielding layer, a color changing layer, a TPU layer, a stain-resistant self-repairing layer and a protective film layer from top to bottom.
2. The color modifying film of claim 1, wherein: the release film layer is made of PET silicon release film.
3. The color modifying film of claim 1, wherein: the mounting adhesive layer is made of high-weather-resistance acrylic adhesive.
4. The color modifying film of claim 1, wherein: the color shielding layer is a white opaque film or a yellow opaque film, and is made of fatty acid polycaprolactone type TPU material or polyvinyl chloride material.
5. The color modifying film of claim 1, wherein: the color changing layer is formed by coating a color changing adhesive on the color shielding layer and drying and curing the color changing adhesive, and the color changing adhesive comprises the following components in parts by mass: 88-92 parts of polyurethane adhesive and 1-2 parts of metal powder; 4-6 parts of color paste and 3-4 parts of ultraviolet absorbent. The color-changing adhesive is obtained by weighing the components in proportion and then fully and uniformly stirring.
6. The color modifying film of claim 1, wherein: the TPU layer adopts a yellowing-resistant fatty acid polycaprolactone type TPU film.
7. The color modifying film of claim 1, wherein: the stain-resistant self-repairing layer is formed by coating self-repairing polyurethane resin, drying and curing.
8. The color changing film according to claim 7, wherein: the self-repairing polyurethane resin is prepared from isocyanate and polyol serving as raw materials through a chain extender, a catalyst, an anti-fouling auxiliary agent, a solvent, a weather-resistant material and a wetting auxiliary agent.
9. The color modifying film of claim 1, wherein: the protective film layer is made of a PET film or a PET film coated with silicone oil on the surface, and plays a role in protecting the appearance of the stain-resistant self-repairing layer in the production process.
10. The color modifying film of claim 1, wherein: the preparation method of the color-changing film comprises the following steps:
step 1, firstly preparing the polyurethane adhesive according to the preparation method of the polyurethane adhesive, and then stirring to prepare the color-changing adhesive according to the following mixture ratio: 88-92 parts of polyurethane adhesive and 1-2 parts of metal powder; 4-6 parts of color paste and 3-4 parts of ultraviolet absorbent. The time from the preparation of the polyurethane adhesive to the coating of the color-changing adhesive is controlled within 4 hours, otherwise, the color-changing adhesive is invalid and cannot be coated.
And 2, coating a color-changing adhesive on the surface of the color shielding layer, drying the color-changing adhesive at the temperature of 85-120 ℃ for 2-5 minutes, and then compounding the color-changing adhesive with the TPU film layer.
Step 3, placing the composite membrane obtained in the step 2 in a space with the air temperature of 40-60 ℃ for standing for 48-96 hours, and entering the next process after the color-changing adhesive is fully cured;
step 4, after the step 3 is finished, coating mounting glue on the PET silicon release film, wherein the thickness of the dry glue is 15-60 mu m, drying the PET silicon release film for 2-5 minutes at the temperature of 100-130 ℃, and then compounding the surface of the PET silicon release film with the surface of the color shielding layer of the composite film;
and 5, preparing the self-repairing polyurethane resin according to the preparation method of the self-repairing polyurethane resin. The time from the preparation of the self-repairing polyurethane resin to the coating of the self-repairing polyurethane resin is controlled within 4 hours, otherwise, the self-repairing polyurethane resin can fail and cannot be used.
Step 6, coating a stain-resistant self-repairing polyurethane coating on the surface of the TPU layer of the composite film in the step 4, drying the TPU layer at 85-150 ℃ for 2-5 minutes with the dry glue thickness of 3-15 microns, and then compounding the TPU layer with a protective film;
and 7, placing the composite film obtained in the step 6 at the temperature of 40-80 ℃ for 48-96h, and obtaining the color-changing film after the self-repairing polyurethane resin is fully cured.
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| CN115785834A (en) * | 2022-11-28 | 2023-03-14 | 广东中鼎科技发展有限公司 | TPU high-low temperature film with repairing function and preparation method thereof |
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