CN106085215B - A kind of haze gauze - Google Patents

A kind of haze gauze Download PDF

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Publication number
CN106085215B
CN106085215B CN201610414305.6A CN201610414305A CN106085215B CN 106085215 B CN106085215 B CN 106085215B CN 201610414305 A CN201610414305 A CN 201610414305A CN 106085215 B CN106085215 B CN 106085215B
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layer
parts
gauze
carbon fiber
haze
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CN106085215A (en
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庄加松
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Fengyang Jiasong New Material Technology Co Ltd
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Fengyang Jiasong New Material Technology Co Ltd
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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
    • 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
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • 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
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/71—Resistive to light or to UV
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

Abstract

The invention discloses a kind of haze gauze, the haze gauze includes five layers, and first layer and layer 5 are gauze layer, the second layer and the 4th layer of carbon fiber stratum reticulare, third layer is film layer, and film layer is heat sealing among carbon fiber stratum reticulare, carbon fiber stratum reticulare and gauze layer bonding；Wherein, film layer is obtained by coating processing film forming, and the raw material of the coating includes by weight：80 100 parts of silica gel lotion, 45 parts of Lauryl Alcohol ester, 20 30 parts of compounded mix, 23 parts of lauryl sodium sulfate, 0.2 0.4 parts of silicone emulsion, 0.1 0.2 parts of methylcellulose, 13 parts of polyvinyl alcohol, 23 parts of chitosan, 8 12 parts of water.Uvioresistant of the present invention, sterilization, haze performance is high, good mechanical property.

Description

A kind of haze gauze
Technical field
The present invention relates to gauze technical field more particularly to a kind of haze gauzes.
Background technology
Currently, haze pollution is increasingly severe, it is more next to atmospheric environment, traffic safety and the threat of the health of people It is bigger, occur various haze gauzes on the market, but the anti-haze effect of most haze gauze is not too much It is good, and it is easy aging, hyperplasia bacterium, it is therefore desirable to a kind of gauze of new haze is provided.
Invention content
Basic background technology, the present invention propose a kind of haze gauze, uvioresistant of the present invention, Antibacterial, haze performance is good, good mechanical property.
A kind of haze gauze proposed by the present invention, the haze gauze include five layers, and first layer and layer 5 are Gauze layer, the second layer and the 4th layer of carbon fiber stratum reticulare, third layer are film layer, and film layer is heat sealing among carbon fiber stratum reticulare, carbon Fiber web layer and gauze layer bonding；
Wherein, film layer is obtained by coating processing film forming, and the raw material of the coating includes by weight：Silica gel lotion 80-100 parts, 4-5 parts of Lauryl Alcohol ester, 20-30 parts of compounded mix, 2-3 parts of lauryl sodium sulfate, silicone emulsion 0.2-0.4 Part, 0.1-0.2 parts of methylcellulose, 1-3 parts of polyvinyl alcohol, 2-3 parts of chitosan, 8-12 parts of water.
Preferably, the aperture of gauze layer is 200-400 μm, has titanium dioxide on gauze layer.
Preferably, the aperture of carbon fiber stratum reticulare is 100-150 μm.
Preferably, aperture is carried in film layer, the wherein aperture in film layer is 20-40 μm.
Preferably, the raw material of compounded mix includes：Diatomite, negative ion powder, montmorillonite.
Preferably, in compounded mix, diatomite, negative ion powder, montmorillonite weight ratio be 2-3：1-2：1-2.
Preferably, in compounded mix, diatomite is 200-300 mesh, and negative ion powder is 400-500 mesh, montmorillonite 100- 200 mesh.
Above-mentioned water is deionized water.
Above-mentioned silica gel, lauryl sodium sulfate, silicone emulsion, methylcellulose, chitosan are food-grade, polyvinyl alcohol For pharmaceutical grade.
The present invention preparation method be：Coating is coated in silica gel mould surface filming, demoulding obtains film layer；By film It is placed among two layers of carbon fiber stratum reticulare, hot pressing is compound, and laser boring obtains semi-finished product gauze；Semi-finished product gauze is placed in two layers Among gauze layer, bonding obtains haze gauze.
The chitosan that the present invention selects in titanium dioxide and film layer on gauze layer cooperates, and gauze layer can be effective Filter large particulate matter, sterilization, uvioresistant, resolving harmful gas so that enter carbon fibre web and the particulate matter of film layer Matter, bacterium greatly reduce, and coordinate the bactericidal effect of chitosan and negative ion powder, and the sterilization that can greatly increase the present invention is made With；Carbon fiber stratum reticulare can further filter large particulate matter, and adsorb haze and dust, and large particulate matter is avoided to reach film Layer blocks aperture, and silica gel can enter the interlayer of montmorillonite in film layer, increase the mechanical performance of film layer, silica gel lotion can With evenly dispersed with diatomite, negative ion powder, montmorillonite so that diatomite, negative ion powder, montmorillonite are evenly distributed on film layer On, there is good suction-operated, negative ion powder to have the ability of good purification air, negative ion powder for diatomite, montmorillonite It cooperates with diatomite, montmorillonite, and coordinates the suction-operated of carbon fiber stratum reticulare, from gauze layer to the layering of film layer Effect so that three kinds of absorption, purification and layering effects cooperate, to greatly increase the haze performance of the present invention； Diatomite, negative ion powder, montmorillonite suitably match and grain size, can further increase the haze performance of the present invention；Gauze The mutual support of layer, carbon fiber stratum reticulare and film layer can further increase the mechanical performance of the present invention.
Specific implementation mode
In the following, technical scheme of the present invention is described in detail by specific embodiment.
Embodiment 1
A kind of haze gauze, the haze gauze include five layers, and first layer and layer 5 are gauze layer, the second layer With the 4th layer of carbon fiber stratum reticulare, third layer is film layer, and film layer is heat sealing among carbon fiber stratum reticulare, carbon fiber stratum reticulare and gauze Layer bonding；
Wherein, film layer is obtained by coating processing film forming, and the raw material of the coating includes by weight：Silica gel lotion 90 Part, 4.5 parts of Lauryl Alcohol ester, 25 parts of compounded mix, 2.5 parts of lauryl sodium sulfate, 0.3 part of silicone emulsion, methylcellulose 0.15 part, 2 parts of polyvinyl alcohol, 2.5 parts of chitosan, 10 parts of water；
The raw material of compounded mix includes：Diatomite, negative ion powder, montmorillonite.
Embodiment 2
A kind of haze gauze, the haze gauze include five layers, and first layer and layer 5 are gauze layer, the second layer With the 4th layer of carbon fiber stratum reticulare, third layer is film layer, and film layer is heat sealing among carbon fiber stratum reticulare, carbon fiber stratum reticulare and gauze Layer bonding；
Wherein, film layer is obtained by coating processing film forming, and the raw material of the coating includes by weight：Silica gel lotion 80 Part, 5 parts of Lauryl Alcohol ester, 20 parts of compounded mix, 3 parts of lauryl sodium sulfate, 0.2 part of silicone emulsion, methylcellulose 0.2 Part, 1 part of polyvinyl alcohol, 3 parts of chitosan, 8 parts of water；
The raw material of compounded mix includes：Diatomite, negative ion powder, montmorillonite, wherein diatomite, negative ion powder, montmorillonite Weight ratio be 3：1：2.
Embodiment 3
A kind of haze gauze, the haze gauze include five layers, and first layer and layer 5 are gauze layer, the second layer With the 4th layer of carbon fiber stratum reticulare, third layer is film layer, and film layer is heat sealing among carbon fiber stratum reticulare, carbon fiber stratum reticulare and gauze Layer bonding；
Wherein, film layer is obtained by coating processing film forming, and the raw material of the coating includes by weight：Silica gel lotion 100 parts, 4 parts of Lauryl Alcohol ester, 30 parts of compounded mix, 2 parts of lauryl sodium sulfate, 0.4 part of silicone emulsion, methylcellulose 0.1 part, 3 parts of polyvinyl alcohol, 2 parts of chitosan, 12 parts of water；
The raw material of compounded mix includes：200 mesh diatomite, 500 mesh negative ion powders, 100 mesh montmorillonites, wherein diatomite, Negative ion powder, montmorillonite weight ratio be 2：2：1.
Embodiment 4
A kind of haze gauze, the haze gauze include five layers, and first layer and layer 5 are gauze layer, the second layer With the 4th layer of carbon fiber stratum reticulare, third layer is film layer, and film layer is heat sealing among carbon fiber stratum reticulare, carbon fiber stratum reticulare and gauze Layer bonding；
Wherein, the aperture of gauze layer is 200 μm, has titanium dioxide on gauze layer, the aperture of carbon fiber stratum reticulare is 150 μ M carries aperture in film layer, and the wherein aperture in film layer is 20 μm；
Film layer is obtained by coating processing film forming, and the raw material of the coating includes by weight：95 parts of silica gel lotion, ten Two 4.2 parts of carbon alcohol esters, 27 parts of compounded mix, 2.2 parts of lauryl sodium sulfate, 0.35 part of silicone emulsion, methylcellulose 0.13 Part, 2.5 parts of polyvinyl alcohol, 2.2 parts of chitosan, 11 parts of water；
The raw material of compounded mix includes：300 mesh diatomite, 400 mesh negative ion powders, 200 mesh montmorillonites, wherein diatomite, Negative ion powder, montmorillonite weight ratio be 2.7：1.3：1.8.
Embodiment 5
A kind of haze gauze, the haze gauze include five layers, and first layer and layer 5 are gauze layer, the second layer With the 4th layer of carbon fiber stratum reticulare, third layer is film layer, and film layer is heat sealing among carbon fiber stratum reticulare, carbon fiber stratum reticulare and gauze Layer bonding；
Wherein, the aperture of gauze layer is 400 μm, has titanium dioxide on gauze layer, the aperture of carbon fiber stratum reticulare is 100 μ M carries aperture in film layer, and the wherein aperture in film layer is 40 μm；
Film layer is obtained by coating processing film forming, and the raw material of the coating includes by weight：85 parts of silica gel lotion, ten Two 4.8 parts of carbon alcohol esters, 23 parts of compounded mix, 2.8 parts of lauryl sodium sulfate, 0.25 part of silicone emulsion, methylcellulose 0.17 Part, 1.5 parts of polyvinyl alcohol, 2.8 parts of chitosan, 9 parts of water；
The raw material of compounded mix includes：200 mesh diatomite, 500 mesh negative ion powders, 100 mesh montmorillonites, wherein diatomite, Negative ion powder, montmorillonite weight ratio be 2.3：1.7：1.2.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (3)

1. a kind of haze gauze, which is characterized in that the haze gauze includes five layers, and first layer and layer 5 are gauze Layer, the second layer and the 4th layer of carbon fiber stratum reticulare, third layer are film layer, and film layer is heat sealing among carbon fiber stratum reticulare, carbon fiber Stratum reticulare and gauze layer bonding；
Wherein, film layer is obtained by coating processing film forming, and the raw material of the coating includes by weight：Silica gel lotion 80-100 Part, 4-5 parts of Lauryl Alcohol ester, 20-30 parts of compounded mix, 2-3 parts of lauryl sodium sulfate, 0.2-0.4 parts of silicone emulsion, methyl 0.1-0.2 parts of cellulose, 1-3 parts of polyvinyl alcohol, 2-3 parts of chitosan, 8-12 parts of water；
The aperture of gauze layer is 200-400 μm, has titanium dioxide on gauze layer；
The raw material of compounded mix includes：Diatomite, negative ion powder, montmorillonite；
In compounded mix, diatomite, negative ion powder, montmorillonite weight ratio be 2-3：1-2：1-2；
In compounded mix, diatomite is 200-300 mesh, and negative ion powder is 400-500 mesh, and montmorillonite is 100-200 mesh.
2. haze gauze according to claim 1, which is characterized in that the aperture of carbon fiber stratum reticulare is 100-150 μm.
3. according to any one of the claim 1-2 haze gauzes, which is characterized in that aperture is carried in film layer, wherein thin Aperture in film layer is 20-40 μm.
CN201610414305.6A 2016-06-06 2016-06-06 A kind of haze gauze Active CN106085215B (en)

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Publication number Priority date Publication date Assignee Title
CN110951393A (en) * 2019-12-04 2020-04-03 安徽骄阳软门有限责任公司 Ultraviolet-resistant gauze and production equipment thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203891728U (en) * 2014-01-09 2014-10-22 安徽理工大学 Cold plasma haze removing window screen
CN104612572A (en) * 2015-01-26 2015-05-13 方存仁 Efficient tiny-dust-proof window gauze capable of releasing negative ions and manufacturing method thereof
CN204703727U (en) * 2015-02-11 2015-10-14 南京大学 A kind of haze screen window
CN105257198A (en) * 2015-11-02 2016-01-20 西安康普瑞新材料科技有限公司 Anti-haze ventilated window screen processing technology and anti-haze ventilated window screen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203891728U (en) * 2014-01-09 2014-10-22 安徽理工大学 Cold plasma haze removing window screen
CN104612572A (en) * 2015-01-26 2015-05-13 方存仁 Efficient tiny-dust-proof window gauze capable of releasing negative ions and manufacturing method thereof
CN204703727U (en) * 2015-02-11 2015-10-14 南京大学 A kind of haze screen window
CN105257198A (en) * 2015-11-02 2016-01-20 西安康普瑞新材料科技有限公司 Anti-haze ventilated window screen processing technology and anti-haze ventilated window screen

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