CN112679777A - Base film for optical protective mask - Google Patents
Base film for optical protective mask Download PDFInfo
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- CN112679777A CN112679777A CN202011346629.3A CN202011346629A CN112679777A CN 112679777 A CN112679777 A CN 112679777A CN 202011346629 A CN202011346629 A CN 202011346629A CN 112679777 A CN112679777 A CN 112679777A
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- coating
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- polyester film
- protective mask
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- 230000003287 optical effect Effects 0.000 title claims abstract description 28
- 230000001681 protective effect Effects 0.000 title claims abstract description 28
- 239000011248 coating agent Substances 0.000 claims abstract description 70
- 238000000576 coating method Methods 0.000 claims abstract description 70
- 229920006267 polyester film Polymers 0.000 claims abstract description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 59
- 239000000377 silicon dioxide Substances 0.000 claims description 27
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 18
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 18
- 229910052915 alkaline earth metal silicate Inorganic materials 0.000 claims description 14
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 12
- -1 polydimethylsiloxane Polymers 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 10
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 229920000178 Acrylic resin Polymers 0.000 claims description 7
- 229920000877 Melamine resin Polymers 0.000 claims description 7
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 7
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 7
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 7
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 7
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 7
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
- 229920000289 Polyquaternium Polymers 0.000 claims description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 5
- 229920008790 Amorphous Polyethylene terephthalate Polymers 0.000 claims description 4
- 230000000844 anti-bacterial effect Effects 0.000 claims description 4
- 239000003899 bactericide agent Substances 0.000 claims description 4
- 125000001181 organosilyl group Chemical group [SiH3]* 0.000 claims description 4
- 238000005530 etching Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 13
- 238000012824 chemical production Methods 0.000 abstract description 6
- 238000005034 decoration Methods 0.000 abstract description 6
- 201000010099 disease Diseases 0.000 abstract description 6
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 6
- 230000002265 prevention Effects 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 230000000007 visual effect Effects 0.000 abstract description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000010410 layer Substances 0.000 description 8
- 229920000728 polyester Polymers 0.000 description 8
- 230000004913 activation Effects 0.000 description 7
- 239000004964 aerogel Substances 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 239000004965 Silica aerogel Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000004528 spin coating Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 3
- 239000001095 magnesium carbonate Substances 0.000 description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 3
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 3
- 239000000391 magnesium silicate Substances 0.000 description 3
- 229910052919 magnesium silicate Inorganic materials 0.000 description 3
- 235000019792 magnesium silicate Nutrition 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 150000003863 ammonium salts Chemical group 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229920006257 Heat-shrinkable film Polymers 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 239000007822 coupling agent Substances 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 1
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- NCLFWRGBSGFNNA-UHFFFAOYSA-N trimethoxy-(3-methyloxiran-2-yl)silane Chemical compound CO[Si](OC)(OC)C1OC1C NCLFWRGBSGFNNA-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a base film for an optical protective mask, which comprises a polyester film, wherein at least one side surface of the polyester film is coated with a hardened coating, and the outer side of the hardened coating is coated with an antifogging coating. The invention provides a base film of an optical protective mask suitable for disease control and epidemic prevention, dentistry, stomatology, instrument cleaning, decoration cleaning, chemical production and protection of face workers needing face protection through an improved coating structure and a formula, can effectively prevent pollutants from splashing to the face when medical personnel take a doctor and check treatment, has a good anti-fog function, and provides a clear visual field for treatment.
Description
Technical Field
The application relates to an optical-grade medical protective mask material, in particular to a base film of an optical protective mask which is suitable for disease control and epidemic prevention, dentistry, stomatology, instrument cleaning, decoration cleaning, chemical production and protection of workers needing face protection.
Background
The optical protective mask is widely applied in the fields of disease control and epidemic prevention, dentistry, stomatology, instrument cleaning, decoration cleaning, chemical production and face protection.
The optical medical protective mask can be used for effectively preventing the splashing of pollutants to the face when medical staff take a doctor for treatment and examination.
In winter, the air temperature is relatively low, the air humidity is relatively high, the antifogging defect of the mask often causes the internal fogging of the mask, the sight of medical staff is not clear, and the medical staff is not very favorable for the treatment of patients. In summer, the temperature is hot, and the protective mask is easy to be heated and deformed in transportation due to the low thermal deformation temperature of the material, so that the wide use of the protective mask is also influenced.
Aiming at the requirements of special protective masks, new materials for optical protective masks are urgently needed to be developed so as to improve the antifogging performance, the optical performance, the heat resistance and the like of the protective masks.
Disclosure of Invention
The technical problem to be solved by the present application is to provide a base film for an optical protective mask to reduce or avoid the aforementioned problems.
In order to solve the above technical problem, the present application proposes a base film for an optical protective mask, comprising a polyester film, at least one side of which is coated with a hardened coating, and the outer side of the hardened coating is coated with an anti-fog coating, wherein the hardened coating comprises the following components: polymethyl methacrylate, ethyl orthosilicate, and methyltriethoxysilane; the antifogging coating comprises the following components: acrylic resin, dimethyl silyl silica surfactant, ethanolamine surface etching agent, polyquaternium surface active bactericide, water-insoluble carbonate, melamine curing agent and propylene glycol solvent.
Preferably, the polyester film is an APET sheet roll or a BOPET film roll
Preferably, the polyester film is a biaxially oriented polyester film BOPET with the thickness of 250 μm.
Preferably, the polyester film is formed by biaxially stretching PET to which silica, an alkaline earth metal silicate, and polydimethylsiloxane are added.
Preferably, the total thickness of the base film is 255-270 mu m, the thickness of the hardening coating is 2-5 mu m, and the thickness of the antifogging coating is 2-5 mu m.
Preferably, the water-insoluble carbonate is calcium carbonate or magnesium carbonate.
Preferably, the particle size of the water-insoluble carbonate is 5 to 10 μm.
Preferably, the content of the silicon dioxide in the polyester film is 0.3 wt% -1.5 wt%, the content of the alkaline earth metal silicate is 0.05 wt% -0.5 wt%, and the content of the polydimethylsiloxane is 0.2 wt% -1.2 wt%.
In addition, the present invention may also provide a step of forming an antifogging coating on a surface of the polyester film, comprising: firstly, uniformly mixing 80-100 parts by weight of acrylic resin, 1-2 parts by weight of dimethyl silylated silica, 10-15 parts by weight of ethanolamine, 0.5-0.8 part by weight of polyquaternary ammonium salt, 5-10 parts by weight of water-insoluble carbonate, 1-2 parts by weight of melamine and 80-100 parts by weight of propylene glycol, coating the mixture on the outer surface of a polyester film by a spin coating or spray coating mode, and curing for 1-2 hours at 70-120 ℃ so as to obtain a precoating layer on the outer surface of the polyester film 1; then, carrying out plasma surface activation treatment on the precoat layer; then, carrying out acid cleaning on the precoat after the activation treatment; finally, washing with water and drying to obtain the antifogging coating.
Preferably, the hardened coating consists of 70-80 parts by weight of polymethyl methacrylate, 10-20 parts by weight of ethyl orthosilicate and 10-20 parts by weight of methyltriethoxysilane. The hardened coating may further comprise gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane.
The invention provides a base film of an optical protective mask suitable for disease control and epidemic prevention, dentistry, oral departments, instrument cleaning, decoration cleaning, chemical production and protection of workers needing to protect faces through an improved coating structure and a formula, can effectively prevent pollutants from splashing to the faces when medical personnel take a doctor, treat and check, has a good antifogging function and provides a clear visual field for treatment.
Drawings
The following drawings are only intended to illustrate and explain the present application and do not limit the scope of the application. Wherein,
FIG. 1 shows a schematic view of a base film for an optical protective mask according to one embodiment of the present application;
fig. 2 shows a schematic view of the structure of a base film for an optical protective mask according to another embodiment of the present application.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present application, embodiments of the present application will now be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.
The invention provides a base film for an optical protective mask, which is suitable for being used as an optical medical protective mask material and used in the fields of disease control and epidemic prevention, dentistry, stomatology, instrument cleaning, decoration cleaning, chemical production, and the like of the professional field needing to protect the face.
Specifically, as shown in fig. 1, the base film for an optical protective mask of the present invention comprises a polyester film 1, a hardening coating 2, and an anti-fog coating 3 in sequence from outside to inside, wherein the anti-fog coating 3 is disposed toward the face of a user to prevent exhaled hot air from condensing on the mask and fogging. The total thickness of the base film of the embodiment is preferably 255-260 μm, the thickness of the hardening coating 2 is 2-5 μm, and the thickness of the anti-fog coating 3 is 2-5 μm.
Of course, the base film of the present invention may also be a structure with both sides coated, as shown in fig. 2. That is, in fig. 2, the hardened coating 2 and the antifogging coating 3 are sequentially disposed on both sides of the polyester film 1, and the base film of such a structure can ensure that both sides of the optical protective mask have antifogging capability, although the cost is relatively higher. The total thickness of the base film of the embodiment is preferably 260-270 μm, the thickness of the hardening coating 2 is 2-5 μm, and the thickness of the anti-fog coating 3 is 2-5 μm.
The base film for the optical protective mask can be further provided with a release film and the like on the outer side of the antifogging coating 3 according to requirements, and is used for protecting the coating on the surface of the base film in the factory leaving process. In order to improve the strength of the optical protective mask and to be applied to an optical protective mask in a special explosion-proof field, the base film of the present invention may be attached to the outer surface of another transparent base material, and in this case, the base film having a coating layer on one surface as shown in fig. 1 is preferably used.
The polyester film 1 of the invention may be a roll of APET sheet or a roll of BOPET film, preferably a biaxially oriented polyester film BOPET with a thickness of 250 μm. Biaxially oriented polyester film BOPET is somewhat more heat resistant than amorphous APET.
In one embodiment, the polyester film 1 of the present application is preferably biaxially stretched from PET with added silica, an alkaline earth metal silicate, and polydimethylsiloxane. Further, in one embodiment, the content of silica in the polyester film 1 is 0.3 wt% to 1.5 wt%, the content of alkaline earth metal silicate is 0.05 wt% to 0.5 wt%, and the content of polydimethylsiloxane is 0.2 wt% to 1.2 wt%.
The silicon dioxide added into the PET can improve the light transmittance, the processing performance and the strength of the polyester film, and can generate an adsorption effect with silicon oxygen components in each coating layer, so that the adhesive force of the coating layers is improved. The alkaline earth metal silicate, preferably magnesium silicate or calcium silicate, most preferably magnesium silicate, can reduce the heat shrinkability due to the increased silica content of the polyester film. The polydimethylsiloxane can improve the dispersibility of silicon dioxide in polyester, avoid agglomeration, is beneficial to reducing the addition amount of inorganic particles and improving the optical performance of a polyester film, and can also generate stronger adhesive force with silicon oxygen in a coating.
Silicon atoms of the silicon dioxide and the alkaline earth metal silicate are combined with silicon atoms of the polydimethylsiloxane, and a macromolecule at the other end of the polydimethylsiloxane can be combined with alkane of the polyester, so that the silicon dioxide and the alkaline earth metal silicate can be uniformly dispersed and kept in the polyester. The alkaline earth elements in the alkaline earth metal silicate are easy to form a complex with proper strength interaction with common phosphorus compound catalysts, stabilizers, flame retardants and the like in the polyester, can improve the dispersibility of the silicon dioxide, can also improve the binding force of the silicon dioxide and the alkaline earth metal silicate in the polyester, and is favorable for improving the light transmittance of the polyester film. In addition, as described above, the addition of an alkaline earth metal silicate such as magnesium silicate or calcium silicate can reduce the shrinkage of the polyester film, and is particularly suitable for addition to a polyester film in the optical field, and is advantageous for improving the optical properties of the base film.
It should be noted that the shrinkage of the polyester film produced by the addition of silica varies significantly, and is very advantageous for heat-shrinkable films. However, for the face shield of the present invention, it is required that the shrinkage of the film be kept at a low level to improve the heat resistance of the face shield. In the present invention, the combination of the silicate component and silica improves the dispersibility, and the alkaline earth metal reduces the shrinkage of the film containing silica, thereby improving the optical properties and heat resistance of the film.
In a preferred embodiment, the silica added to the PET is preferably silica aerogel. The silica aerogel is a low-density silica aerogel which is porous and disordered and has a nano-scale continuous network structure, the specific surface area of the silica aerogel is much larger than that of common silica, and phosphate coupling agents and silane coupling agents (such as vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris (beta-methoxyethoxy) silane and the like) in the prior art are more difficult to disperse than the common silica. Because of its very low density, it floats easily and cannot be dispersed into the polyester. The porous structure of the aerogel can generate strong binding force through the polydimethylsiloxane, the density of the aerogel is increased, and the aerogel can be immersed into the polyester. The specific surface area of the alkaline earth metal silicate is also large, the loose and porous characteristic is similar to that of the aerogel, but the dispersibility is better, and the silicon element component of the alkaline earth metal silicate is adsorbed by the aerogel, so that the dispersibility of the aerogel can be improved, and the agglomeration is avoided.
The viscosity of the polyester film added with silicon dioxide or silicon dioxide aerogel, alkaline earth metal silicate and polydimethylsiloxane has little change relative to the bulk polyester, which is beneficial to maintaining the stability of the parameters of the polyester film; the dosage of the anti-adhesion particles can be reduced; the processing property, tensile strength, light transmittance and flame retardant property of the polyester film are improved. In addition, the glossiness, the wear resistance, the high temperature resistance and the heat insulation performance of the polyester film can be improved.
The hardened coating 2 coated on the surface of the polyester film 1 comprises the following components: polymethyl methacrylate, tetraethoxysilane and methyltriethoxysilane. Wherein, polymethyl methacrylate mainly provides a hard surface after curing, and provides stable support for the outer antifogging coating 3. Tetraethoxysilane and methyltriethoxysilane are used for providing a compact and adhesive silicon oxide structure, so that the wear resistance and the scratch resistance are improved, and the antifogging coating 3 is conveniently adhered and formed on the silicon oxide structure.
In a specific embodiment, the hardening coating 2 may be composed of 70-80 parts by weight of polymethyl methacrylate, 10-20 parts by weight of ethyl orthosilicate, and 10-20 parts by weight of methyltriethoxysilane. The components forming the hardened coating 2 can be added into 50-200 parts by weight of diethyl ether and 50-100 parts by weight of deionized water according to the proportion of 100 parts by weight, and are uniformly mixed, then the mixture is coated on the surface of the composite polyester film 3 in a spin coating or spray coating mode, and the surface is cured for 2-3 hours at 90-100 ℃, so that the hardened coating 2 can be obtained.
Furthermore, 5-10 parts by weight of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane can be added into the components to provide further coupling modification for the silicon-oxygen component in the coating, so that the compactness and the antistatic property of the silicon-oxygen component in the sub-hardened coating 2 can be further improved. At this time, the hardened coating 2 may be composed of 70-80 parts by weight of polymethyl methacrylate, 10-20 parts by weight of ethyl orthosilicate, 10-20 parts by weight of methyltriethoxysilane, and 5-10 parts by weight of γ - (2, 3-epoxypropyltrimethoxysilane). Similarly, the components constituting the hardened coating 2 can be added into 50-200 parts by weight of diethyl ether and 50-100 parts by weight of deionized water according to the proportion of 100 parts by weight, and then the mixture is uniformly mixed, then the mixture is coated on the surface of the composite polyester film 3 by a spin coating or spray coating mode, and the surface is cured for 2-3 hours at 90-100 ℃, so that the hardened coating 2 of the invention can be obtained.
The antifogging coating 3 coated on the surface of the hardening coating 2 comprises the following components: acrylic resin, dimethyl silyl silica surfactant, ethanolamine surface etching agent, polyquaternium surface active bactericide, water-insoluble carbonate, melamine curing agent and propylene glycol solvent.
The ethanolamine surface erosion agent can degrade and erode the outer surface of the hardened coating 2 to a certain extent, so that the flatness of the outer surface of the hardened coating 2 is reduced, and the hydrophilic component in the antifogging coating 3 is favorably and firmly combined with the hardened coating 2; and the ethanolamine is easy to decompose gas in the coating curing process, so that the antifogging coating 3 can form a fluffy and porous structure. The acrylic resin has hydrophilicity, is further emulsified by the dimethyl silyl silica surfactant, and the silicon-containing surfactant can obtain strong bonding force with the hardened coating 2 and the polyester film 1. The polyquaternium surface active bactericide can reduce the surface tension of the cured coating surface, improve the affinity and the diffusion capacity of the coating to water vapor, avoid the water vapor condensation to reduce the light transmittance, and has the sterilization function, so that the coating can be kept in a use state for a long time. Melamine is not moisture sensitive compared to other curing agents and has a better affinity with the silane hardening the coating 2. The water-insoluble carbonate can be selected from calcium carbonate or magnesium carbonate, and is required to avoid reaction with ethanolamine and dissolution in water and other water-soluble components.
In one embodiment, the anti-fog coating 3 of the present invention comprises 80 to 100 parts by weight of acrylic resin, 1 to 2 parts by weight of silica dimethyl silylate, 10 to 15 parts by weight of ethanolamine, 0.5 to 0.8 parts by weight of polyquaternium salt, 5 to 10 parts by weight of water-insoluble carbonate, 1 to 2 parts by weight of melamine, and 80 to 100 parts by weight of propylene glycol.
The antifogging coating 3 of the present invention can be prepared by the following steps.
Firstly, uniformly mixing 80-100 parts by weight of acrylic resin, 1-2 parts by weight of dimethyl silylated silica, 10-15 parts by weight of ethanolamine, 0.5-0.8 part by weight of polyquaternary ammonium salt, 5-10 parts by weight of water-insoluble carbonate, 1-2 parts by weight of melamine and 80-100 parts by weight of propylene glycol, coating the outer surface of the hardened coating 2 by a spin coating or spray coating mode, and curing at 70-120 ℃ for 1-2 hours, thereby obtaining a precoat layer on the outer surface of the hardened coating 2.
In a specific embodiment, the thickness of the precoat is 2-5 μm, and the water-insoluble carbonate is preferably calcium carbonate or magnesium carbonate with a particle size of 5-10 μm.
Thereafter, the precoat layer is subjected to a plasma surface activation treatment. After surface activation treatment, the surface of the precoat layer can form a uniform rough surface with convex and concave parts, and the water-insoluble carbonate in the surface can be partially exposed. The plasma surface activation treatment is a common treatment method in the field, and for example, the activation treatment can be carried out by oxygen, the oxygen flow is 100sccm, and the vacuum degree is 0.1-0.2mbar for 30s-60 s.
Then, the precoat layer after the activation treatment is subjected to acid washing. Preferably, the precoat layer is soaked by 6-8mol/L hydrochloric acid at 50-60 ℃ for 10-20 minutes. Through acid washing, the exposed carbonate component on the precoating layer can be partially dissolved, a porous structure can be further obtained, the surface activity of the coating is further improved, the surface tension of the coating is favorably reduced, and the affinity and the diffusibility to water vapor are improved.
Finally, washing with water and drying to obtain the antifogging coating 3. Washing with water for 10-20 min, and oven drying at 50-60 deg.C for 30 min.
In addition, the antifogging coating 3 provided by the invention has relatively high surface activity and hydrophilicity, is very favorable for being tightly combined with silicone release agent, can avoid release of the release agent, and is also very favorable for protecting optical protective masks produced by subsequent processing.
In conclusion, the invention provides the base film of the optical protective mask which is suitable for disease control and epidemic prevention, dentistry, stomatology, instrument cleaning, decoration cleaning, chemical production and protection of face workers needing to protect faces through the improved coating structure and formula, can effectively prevent pollutants from splashing to the faces when medical personnel take a visit, treat and check, has good antifogging function and provides clear vision for treatment.
It should be appreciated by those skilled in the art that while the present application has been described in terms of several embodiments, not every embodiment includes only a single embodiment. The description is thus given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including all technical equivalents which are encompassed by the claims and are to be interpreted as combined with each other in a different embodiment so as to cover the scope of the present application.
The above description is only exemplary of the present application and should not be taken as limiting the scope of the present application. Any equivalent alterations, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of this application shall fall within the scope of this application.
Claims (5)
1. A base film for an optical protective mask, comprising a polyester film (1), at least one side of the polyester film (1) being coated with a hardening coating (2), the outside of the hardening coating (2) being coated with an antifogging coating (3), characterized in that the hardening coating (2) comprises the following components: polymethyl methacrylate, ethyl orthosilicate, and methyltriethoxysilane; the antifogging coating (3) comprises the following components: acrylic resin, dimethyl silyl silica surfactant, ethanolamine surface etching agent, polyquaternium surface active bactericide, water-insoluble carbonate, melamine curing agent and propylene glycol solvent.
2. The base film according to claim 1, characterized in that the polyester film (1) is a roll of APET sheet or BOPET film.
3. The base film according to claim 2, characterized in that the polyester film (1) is a biaxially oriented polyester film BOPET with a thickness of 250 μm.
4. The base film according to claim 1, characterized in that the polyester film (1) is obtained by biaxial stretching of PET added with silica, alkaline earth metal silicate and polydimethylsiloxane.
5. The base film according to claim 1, wherein the total thickness of the base film is 255 to 270 μm, the thickness of the hardened coating (2) is 2 to 5 μm, and the thickness of the antifogging coating (3) is 2 to 5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011346629.3A CN112679777A (en) | 2020-11-26 | 2020-11-26 | Base film for optical protective mask |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011346629.3A CN112679777A (en) | 2020-11-26 | 2020-11-26 | Base film for optical protective mask |
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| CN112679777A true CN112679777A (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011346629.3A Pending CN112679777A (en) | 2020-11-26 | 2020-11-26 | Base film for optical protective mask |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708161A (en) * | 2020-12-28 | 2021-04-27 | 江苏双星彩塑新材料股份有限公司 | Magnetic control heat insulation antifogging base film |
| CN113682019A (en) * | 2021-08-31 | 2021-11-23 | 江苏双星彩塑新材料股份有限公司 | Pearlescent polyester film and preparation method thereof |
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| US20090075099A1 (en) * | 2007-04-09 | 2009-03-19 | Sung-Yueh Shieh | Waterborne Coating Compositions for Optical-use Polyester film |
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| CN104774556A (en) * | 2015-04-15 | 2015-07-15 | 苏州创佳电子材料有限公司 | Anti-glare hardening coating for screen protective film and preparation method and application of coating |
| CN106476379A (en) * | 2016-09-21 | 2017-03-08 | 东莞市联洲知识产权运营管理有限公司 | A kind of heat-insulated antifog film of vehicle glass |
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| US20090075099A1 (en) * | 2007-04-09 | 2009-03-19 | Sung-Yueh Shieh | Waterborne Coating Compositions for Optical-use Polyester film |
| CN102317359A (en) * | 2009-02-18 | 2012-01-11 | 富士胶片株式会社 | Multilayer film and method for producing the same |
| CN104774556A (en) * | 2015-04-15 | 2015-07-15 | 苏州创佳电子材料有限公司 | Anti-glare hardening coating for screen protective film and preparation method and application of coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112708161A (en) * | 2020-12-28 | 2021-04-27 | 江苏双星彩塑新材料股份有限公司 | Magnetic control heat insulation antifogging base film |
| CN113682019A (en) * | 2021-08-31 | 2021-11-23 | 江苏双星彩塑新材料股份有限公司 | Pearlescent polyester film and preparation method thereof |
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