JPH04108183A - Flameproofing shade curtain and production thereof - Google Patents

Abstract

PURPOSE:To obtain the subject curtain excellent in durability of flameproofing effect by using a flame-retardant textile base material as the surface layer of a shade curtain, forming a porous layer consisting of a polyurethane containing a flame-retardant and a crosslinking agent on the back surface of the base material, further forming a coating layer thereon and coloring one of the above-mentioned layers using a dark color. CONSTITUTION:A flame-retardant textile base material or a textile base material given textile treatment is used as the surface layer of a curtain. A wet method type porous layer consisting of a flame-retardant 5 and a crosslinking agent-containing polyurethane having an improved heat resistance, heat deterioration resistance, etc., is then formed on the back surface of the above-mentioned base material and a coating layer consisting of a polyurethane containing a flame-retardant and a crosslinking agent is further formed on the back surface of the above-mentioned porous layer. A colorant is applied to either the porous layer or the coating layer, thus obtaining the objective flameproofing shade curtain capable of maintaining excellent flameproofing properties over a long period. As the high molecular diol constituting the polyurethane, a polyester-based diol having >=170 deg.C softening temperature is preferable from the point of view of heat resistance. As the crosslinking agent, an ads compound, etc., between trimethylolpropane and tolylenediisocyanate is exemplified.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a flame-retardant blackout curtain that has a good texture, a rich sense of volume, and a durable flame-retardant effect without impairing the appearance, and a method for producing the same. . [Prior Art and Problems] Conventionally, blackout curtains used in public places such as theaters and hotels have been required to have flame retardant properties.
In addition, as a light-blocking curtain suitable for use in such places, a fiber base material (curtain (referring to the fabric)
It is known that a polyurethane layer is laminated thereon. These laminates are generally made by laminating a fiber base material and a polyurethane layer via an adhesive using a dry manufacturing method.
The texture was hard, paper-like, and lacked volume. In addition, as a conventional method for imparting flame retardant performance to the above-mentioned light-blocking curtains using the dry manufacturing method, in addition to making the fiber base material flame retardant, each of the constituent layers contains a phosphate ester compound and a halogen-containing phosphate ester compound. , those to which various flame retardants such as inorganic compounds are added are known. However, when these flame retardants are added to polyurethane, the flame retardant itself is an acidic substance, or
Since it has the property of releasing acidic substances such as halogen-based and phosphorous-based substances over time, the polyurethane that constitutes the blackout curtain is affected by this and its hydrolytic deterioration is significantly accelerated. Furthermore, in addition to this, photodegradation and thermal deterioration tend to be accelerated at the same time, resulting in defects such as embrittlement and deterioration of the polyurethane, resulting in a decrease in durability and the ability to withstand long-term use. . In addition, these flame retardants have poor compatibility with polyurethane, so if a blackout curtain laminated with these flame retardants added is used for a long period of time, the flame retardant used will ooze out on the surface of the polyurethane film, so-called. There was also the problem that a bloom phenomenon was likely to occur. On the other hand, the flame-retardant treatment of blackout curtains using the wet manufacturing method is technically more difficult than the dry manufacturing method, and as this problem remains unresolved, no durable, flame-retardant curtains have been obtained to date. The specific details of the technical difficulties in flame retardant treatment of blackout curtains using the wet manufacturing method are as follows. In other words, even if flame retardant treatment is applied to the fiber base material, the flame retardant will be eluted into water during solvent removal and coagulation to form a microporous layer in wet processing, and the effect will be lost. Even if a flame retardant is added to the polyurethane, the flame retardant will be eluted into the water together with the solvent during solvent removal and coagulation, and the effect will be lost. [Means for Solving the Problems] An object of the present invention is to provide a flameproof and light-shielding curtain that solves the above-mentioned conventional drawbacks related to the wet manufacturing method. ) A flame-retardant fiber base material or a flame-retardant treated fiber base material is used as the surface layer of the blackout curtain, and a wet microporous layer of polyurethane containing a flame retardant and a crosslinking agent is laminated and integrated on the back side of the base material. Furthermore, a polyurethane film layer containing a flame retardant and a crosslinking agent is provided on the back side of the wet microporous layer.
A flame-retardant light-shielding curtain characterized in that at least one of the wet microporous layer and the film layer is colored in a dark color. (2) The flame-retardant blackout curtain according to claim 1, wherein the polymeric diol constituting the polyurethane is a polyester diol. (3) The flame-retardant blackout curtain according to claim 1, wherein the polyurethane has a softening temperature of 170° C. or higher. (4) The flame retardant is a bromine-containing compound having at least one active hydrogen in the molecule or a bromine-containing urethane compound or a phosphorus-containing bromine-urethane compound which is a reaction product of a phosphorus-containing bromine compound and an organic polyisocyanate. The flame-retardant blackout curtain according to claim 1, characterized in that: (5) The flame-retardant blackout curtain according to claim 4, characterized in that antimony trioxide is used in combination as a flame retardant. (6) The crosslinking agent is an adduct of trimethylolpropane and tolylene diisocyanate, an adduct of trimethylolpropane and hexa The flame-retardant light-shielding material according to claim 1, characterized in that it is one or more selected from an adduct with methylene diisocyanate, an adduct with trimethylolpropane and inphorone diisocyanate, or a trimer of hexamethylene diisocyanate. curtain. (7) After applying a hydrophilic organic solvent solution of polyurethane containing a flame retardant and a crosslinking agent to a flame-retardant fiber base material or a fiber base material that can be flame-retardant treated, the solvent is removed by immersing it in water. At the same time, the polyurethane is coagulated to form a wet microporous layer of polyurethane, and a polyurethane containing a flame retardant and a crosslinking agent is formed between the microporous layers on a flame retardant fiber base material or a fiber base material made flame retardant during the process. A method for producing a flame-retardant blackout curtain, characterized by forming a film layer of. The main points are as follows. [Example] Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 shows an embodiment of the flame-retardant blackout curtain 1 of the present invention, in which 2 is a fiber base material, and 4 is a wet microporous layer 3 of polyurethane containing a flame retardant and a crosslinking agent on the fiber base material 2. This is a polyurethane film layer containing an integrated flame retardant and crosslinking agent. In the present invention, the fiber base material 2 includes a base material itself having flame retardancy, and a fiber material such as knitted fabric, woven fabric, non-woven fabric, etc., which has been subjected to flame retardant treatment. Flame retardant treatment can be performed prior to the manufacturing process or during the process. The flame-retardant fiber base material 2 includes, for example, spun yarn or filaments of flame-retardant polyester obtained by copolymerizing or mixing a phosphorus compound or a halogen compound as a flame retardant with polyester, or a filament alone or in a blend. A knitted fabric knitted, woven or intertwined using single or blended fibers such as fibers, modacrylic synthetic fibers made of vinyl chloride-acrylonitrile copolymer fibers, and voriclar synthetic fibers made of vinyl chloride-polyvinyl alcohol copolymer fibers. ,
Use woven fabric, non-woven fabric, etc. This is the same even if the fiber base material is subjected to flame retardant treatment after being processed. After laminating the wet microporous layer 3, the microporous layer can be treated simultaneously with flame retardation. Hereinafter, an example in which the fiber base material is subjected to flame retardant treatment in a later step will be described. The fiber base material 2 may include knitted fabrics or woven fabrics made of natural fibers such as cotton and hemp, recycled fibers such as rayon, cotton wool, and acetate, and synthetic fibers such as polyester, polyamide, and polyacrylonitrile, either alone or in combination with various fibers. Woven cloth or the like is used. Note that impregnated fabrics obtained by impregnating resin-impregnated fabrics such as knitted fabrics, woven fabrics, nonwoven fabrics, etc., including flame-retardant fibers, can also be used. Furthermore, the fiber base material may be one whose front or back surface is raised or raised, if necessary. A method of post-treating a fiber base material on which a wet microporous layer is laminated and integrated with a flame retardant such as a halogen compound, a halogenated phosphate ester compound, a phosphorous-containing nitrogen-containing compound, or a mixture thereof is as follows. Any processing method such as , impregnation method, coating method, gravure method, etc. may be used. If these flame retardants are attached excessively to the fiber base material, there is a possibility that the flame retardant will migrate to the polyurethane film layer 4 and deteriorate the polyurethane microporous layer 3 and the polyurethane film layer 4. The adhesion rate of flame retardant is 5
~20% by weight is preferred. As mentioned above, the front or back side of the fiber base material 2 may or may not be brushed or napped, but if it is brushed or napped, the texture of the blackout curtain l will be softer and the volume will be increased. You can get something full of emotions. Polyurethane wet microporous layer 3 and polyurethane film layer 4
contains a flame retardant and a crosslinking agent, and the flame retardant added to impart flame retardancy is a bromine-containing urethane compound or a phosphorus-containing bromine-urethane compound that is compatible with polyurethane and does not cause deterioration. There are compounds, etc.
For example, the reaction product of 2,2-bis(4-hydroxy-3,5-dibromophenyl)propane and tolylene diisocyanate, the reaction product of 2,3-dibromopropanol and hexamethylene diisocyanate, 2,2-bis Reaction product of (4-hydroxyethoxy-3,5-dibromophenyl)propane and hexamethylene diisocyanate, reaction product of tetrakis(hydroxymethyl)phosphonium bromide and tolylene diisocyanate, hydroxymethyl-ureidomethyl phosphor A reaction product of nium bromide and tolylene diisocyanate, a reaction product of 2,2-bis(4-hydroxy-3,5-1 dibromophenyl)propane, a phosphate polyol, and hexamethylene diisocyanate, etc. can be used. Antimony dioxide can be used in combination with these bromo-urethane compounds and phosphorus-containing bromo-urethane compounds. When antimony dioxide is used in combination with a bromine-containing urethane compound or a phosphorous-containing bromine-containing urethane compound, the bromine-based flame retardant and antimony dioxide combine during combustion to produce antimony bromide with a high boiling point, which has a surface shielding effect. It is thought that the flame retardant acts to cut off the supply of oxygen, and due to the synergistic effect, higher flame retardant performance can be obtained with a small amount of flame retardant added. Furthermore, antimony dioxide also combines with the flame retardant used in the flame retardant treatment of the fiber base material during combustion to exhibit a synergistic effect. Polyurethane wet microporous layer 3 and polyurethane film layer 4
The bromine-containing urethane compound or phosphorus-containing bromine-containing urethane compound contained in the flame retardant has a bromine content of 1
A compound with a phosphorus content of 0 to 40% and a phosphorus content of 1 to 10% is preferable, and the amount added is preferably 15 to 40 parts by weight per 100 parts by weight (solid content) of polyurethane. It is preferably 30 to 60% by weight relative to the urethane compound or the phosphorus-containing bromourethane compound. Examples of the bromine-containing urethane compound or phosphorus-containing bromine-urethane compound used in the present invention include DFR-10013 and DFR-1002S manufactured by Dainichiseika Chemical Co., Ltd.
, DFR-1003S (product name), Dainippon Ink Co., Ltd.: Frame Guard PU-300 (product name), and other flame retardants having a urethane bond in the molecule. Furthermore, in the present invention, a crosslinking agent is added to the polyurethane wet microporous layer 3 and the polyurethane film layer 4 to combine active hydrogen in the polyurethane and bromourethane compound or phosphorus-containing bromourethane compound molecules with isocyanate groups in the crosslinker molecule. By reacting with the flame retardant, polyurethane and flame retardant are bonded three-dimensionally using a cross-linking agent to prevent the flame retardant from falling off.
The purpose is to provide a more durable flame retardant effect. Furthermore, by adding a crosslinking agent, it is possible to improve heat resistance, heat deterioration resistance, etc. due to the crosslinking effect of polyurethane. As a crosslinking agent, for example, trimethylolpropane (TM
P) and tolylene diisocyanate (TDI), TMP and hexamethylene diisocyanate (HM
An adduct of TMP and isophorone diisocyanate (JPDI), a trimer of HMD I, etc. can be used. These crosslinking agents can be used alone or in combination. Polyurethane wet microporous layer 3 and polyurethane film layer 4
The crosslinking agent contained in the isocyanate content is 1
2 to 22% adduct or trimer is preferred, and the amount added is 2 to 22% of the adduct or trimer based on 100 parts by weight (solid content) of the polyurethane.
~25 parts by weight is preferred. If the amount of the crosslinking agent added is less than 2 parts by weight, the crosslinking density will be low and there will be no effect.On the other hand, if the amount added is more than 25 parts by weight, the crosslinking density will be too high, making the polyurethane hard and shortening the pot life. It's inconvenient. Examples of the crosslinking agent used in the present invention include Coronate and Coronate H manufactured by Nippon Polyurethane Co., Ltd.
Coronate EH1 Manufactured by Sumitomo Bayer Urethane: Desmodur, Desmodur N, Sumidur N-7
5. Manufactured by Dainippon Ink: Crisbon NX, Parnock D
Examples include N-950. Polyurethane can be obtained by reacting a polymeric diol such as polyester or polyether with an organic diisocyanate and an active hydrogen compound on the chain extension side. are limited to polyester polyurethanes. Examples of polymeric diols used in the polyester polyurethane include condensed voluster diols, polymerizable lactone polyester diols, and polycarbonate diols. Polyurethanes using these polymeric diols generally have excellent heat resistance, heat deterioration resistance, oxidative deterioration resistance, etc., which are considered essential conditions for the polyurethane itself to exhibit flame retardancy. On the other hand, although polyether polyurethane has excellent hydrolysis resistance, it is inferior in heat resistance, heat deterioration resistance, and oxidation deterioration resistance, so it is inconvenient as a polyurethane to be used in the flameproof and light-shielding curtain of the present invention. In addition, the softening temperature of polyester polyurethane is 170°C or higher, preferably 190°C or higher.
℃ or higher is preferable. Polyurethane generally has the property of being easily combustible, and in addition to adding flame retardants to make it flame retardant, in order for polyurethane itself to become more flame retardant, it must have excellent heat resistance and heat deterioration resistance. As mentioned above, it is necessary to raise the softening temperature of polyurethane in order to increase the decomposition temperature of polyurethane. A polyurethane adhesive may be used as an intermediate layer to bond the wet microporous polyurethane layer 3 and the polyurethane film layer 4, and the film layer 4 is laminated and integrated with the wet microporous layer 3 by heat-pressure lamination. In this case, it is not necessary to use adhesive. The adhesive is limited to polyester polyurethane, and either one-component polyurethane or two-component polyurethane can be used. In the case of one-component polyurethane, the softening temperature of the polyurethane is 170°C or higher. The wet microporous polyurethane layer 3 is formed by coating the fiber base material 2 with a solution of a polyurethane-based organic solvent, and then immersing it in water to dissolve and remove the solvent, thereby coagulating the polyurethane. I can do it. 100 as the polyurethane forming the wet microporous layer 3
A hydrophilic organic solvent having a % modulus of 10 to 100 kg/d is preferable, and the hydrophilic organic solvent is one that can dissolve the polyurethane and the solvent itself can be dissolved in water, such as dimethylformamide, dimethylacetamide, etc. The polyurethane solution in an organic solvent usually has a polyurethane concentration of about 10 to 20% by weight. If the wet microporous layer 3 is formed too thick, the rubber elasticity will be too strong, and if it is too thin, the volume will be lost.
0 to 600 μm is preferable. In addition, surfactants, fillers, colorants, various stabilizing agents, etc. can be added for the purpose of improving the wet film formability and texture of this polyurethane, but the type and amount of additives will depend on the physical properties. It is necessary to make a careful decision regarding this. The wet microporous polyurethane layer 3 may contain an opaque pigment, mainly a black pigment, for the purpose of blocking light, and if necessary, a light blocking powder such as a metal powder may also be mixed therein. Polyurethane film layer 4 has a 100% modulus of 30 to 15
It is preferably made of polyurethane of 0 kg/cd, and its thickness is preferably 5 to 100 μm. The polyurethane film layer 4 can be colored with a pale color based on opaque pigments, including a light-shielding effect, and if necessary, light-shielding powders such as carbon powder or metal powder can be mixed therein. Various additives such as a light stabilizer, a UV absorber, and a hydrolysis inhibitor can be added. As shown in FIGS. 2 and 3, the blackout curtain of the present invention has the following features:
A polyurethane solution 6 for forming a film layer containing a flame retardant, a crosslinking agent, a coloring agent, etc. is applied to the surface of the flat or diaphragm release paper 5.
After applying it to a uniform thickness using a doctor knife 7 etc.,
A polyurethane layer 9 for forming a film layer is formed by drying in a heating oven 8, and then a wet microporous layer 3 of polyurethane containing a flame retardant, a crosslinking agent, a coloring agent, etc. is formed on the fiber base material 2 by the method described above. The wet microporous layer 3 surface of the formed sheet 10 is superimposed on the wet microporous layer 3 and the two are thermocompression bonded while being heated by a heating roll 11. After passing through a heating oven 12 to completely volatilize the remaining solvent, a release paper 5 is applied. By peeling off, it is possible to produce a flame-retardant light-shielding curtain l in which the polyurethane layer 9 for film layer formation is transferred and laminated on the surface of the wet microporous layer 3 on the fiber base material 2. In addition, when bonding the wet microporous layer and the film layer with an adhesive, a polyurethane film layer is formed on the release paper, and then a polyurethane adhesive layer is formed on this film surface, and then a polyurethane film layer is formed on the fiber base material. A method of laminating between wet microporous layers is employed, and the laminating method includes a wet laminating method, a dry laminating method, a semi-wet laminating method using a combination of these methods, and a semi-dry laminating method. Hereinafter, the present invention will be explained in more detail by giving specific examples. Example 1 A one-sided coarsely brushed fabric of a fiber base material made of a woven fabric with a basis weight of 180 g/rrf made of flame-retardant polyester fiber obtained by copolymerizing a phosphorus compound with polyester was coated at a softening temperature of 195°C.
, polyester polyurethane with a 100% modulus of 40 kg/cj (manufactured by Dainippon Ink Co., Ltd.: Crispon MP-
823) Per 100 parts by weight (polyurethane solid content),
Bromourethane compound (manufactured by Dainichiseika Co., Ltd.: DFR-10
01S) 30 parts by weight, crosslinking agent (manufactured by Nippon Polyurethane Co., Ltd.:
Coronate HL) 15 parts by weight, anionic surfactant (
Manufactured by Dainippon Ink Co., Ltd.: Chris Bon Assister 5D-11)
A polyurethane solvent solution with a solid content of 14% (the solvent is dimethylformamide) containing 3 parts by weight and 15 parts by weight of a black colorant (manufactured by Dainippon Ink Co., Ltd.: Dailac L Color).
A coating solution consisting of the following was prepared and coated to a thickness of 0.8-1. After applying the above coating liquid onto the one-sided rough-raised fabric of the fiber base material,
It was coagulated in water at 20°C, the solvent was removed, and after dehydration, it was dried under hot air at 130°C to form a microporous layer with a thickness of 390 μm and a good surface smoothness. On the other hand, on a flat release paper, a softening temperature of 190℃, 10
Polyester polyurethane with a 0% modulus of 70 kg/d (Dainippon Ink Co., Ltd.: Crisbon 8266EL)
100 parts by weight (polyurethane solid content), 30 parts by weight of bromine-containing urethane compound (DFR-10013),
10 parts by weight of crosslinking agent (Coronet HL), and 20 parts of light coloring agent (Dailac TV Color, manufactured by Dainippon Ink Co., Ltd.)
A coating solution consisting of a polyurethane solvent solution (the solvent is a mixed solvent of dimethylformamide and methyl ethyl ketone) with a solid content of 19% by weight was applied using a knife coater to a dry thickness of 15 pm, and heated at 90°C. A polyurethane film layer was formed by drying with hot air for 2 minutes. The wet microporous layer of the sheet having the wet microporous layer is bonded to the upper surface of this polyurethane film layer by thermocompression at 170°C while heating, and then the release paper is peeled off and the sheet surface contains the flame retardant. A light-shielding curtain was obtained by transferring and laminating a polyurethane film layer. Example 2 Date 190 made of polyester/rayon blend fiber
Softening temperature 200℃, 100
Polyester polyurethane with a % modulus of 90 kg/d (manufactured by Dainippon Ink Co., Ltd.; Crisbon 8616) 100
Phosphorous-containing bromourethane compound (manufactured by Dainippon Ink Co., Ltd.: Framegar) per part by weight (polyurethane solid content)
PU-300) 25 parts by weight, crosslinking agent (Nippon Polyurethane Co., Ltd.: Coronet EH) 18 parts by weight, anionic surfactant (Crisbon Assister 5D-11) 3 parts by weight, and black coloring agent (Dylac color) A coating liquid consisting of a polyurethane solvent solution containing 15 parts by weight and a solid content of 16% (the solvent was dimethylformamide) was prepared, and this was coated to a thickness of 0.9 mm. After applying the above coating liquid on one side of the fiber base material,
The mixture was coagulated in water at 20° C., the solvent was removed, and after dehydration, it was dried under hot air at 130° C. to form a microporous layer with a thickness of 450 μm and good surface smoothness. After that, 10 parts by weight of a phosphorus-containing nitrogen-containing compound (manufactured by Dainippon Ink Co., Ltd.: Frame Guard VF-74) and an organic phosphorus compound (
Impregnated with a liquid mixture consisting of 5 parts by weight of Frame Guard 5316-3 (manufactured by Dainippon Ink Co., Ltd.), 2 parts by weight of melamine resin, 0.2 parts by weight of catalyst, and 85 parts by weight of water, so that the wet pickup rate was 80%. The polyester/rayon blend fiber was subjected to flame retardant treatment by squeezing it, drying it at 130°C for 3 minutes, and then heat-treating it at 150°C for 2 minutes. On the other hand, on the release paper with aperture, softening temperature 170℃ 1100%
Per 100 parts by weight (polyurethane solid content) of polyester polyurethane with a modulus of 40 kg/d (manufactured by Dainichiseika Co., Ltd.: Rezamin ME-823), 25 parts by weight of phosphorus-containing bromourethane compound (Frame Guard PU-300), crosslinking agent When drying, a coating solution consisting of a polyurethane solvent solution (solvent is a mixed solvent of dimethylformamide and methyl ethyl ketone) with a solid content of 23% containing 7 parts by weight of (Coronate EH) and 20 parts by weight of a light-colored colorant (Dyrank TV Color) was applied. It was coated with a knife coater to a thickness of 20 μm and dried with hot air at 90°C for 2 minutes to form a polyurethane film layer. The wet microporous layer of the sheet having the wet microporous layer is bonded to the upper surface of this polyurethane film layer by thermocompression at 160°C while heating, and then the release paper is peeled off and the sheet surface contains the flame retardant. A light-shielding curtain was obtained by transferring and laminating a polyurethane film layer. Example 3 Fabric weight 190 made of polyester/rayon blend fiber
Softening temperature 200"C, 10
Polyester polyurethane with a 0% modulus of 90 kg/cj (Dainippon Ink Co., Ltd.: Crisbon 8616) 1
00 parts by weight (polyurethane solid content), 10 parts by weight of antimony dioxide (manufactured by Suzuhiro Chemical Co., Ltd.: AT-3B), 20 parts by weight of a phosphorus-containing bromine urethane compound (manufactured by Dainippon Ink Co., Ltd.: Frame Guard PU-300), 18 parts by weight of Kake 411 (manufactured by Nippon Polyurethane Co., Ltd.: Coronate EH), anionic surfactant M (Crisbon Assister 5D-11)
3 parts by weight and 1 black coloring agent (dylac color)
A coating solution consisting of a polyurethane solvent solution containing 5 parts by weight and a solid content of 18% (the solvent was dimethylformamide) was prepared, and this was coated to a thickness of 0.9 um. After applying the above coating liquid on one side of the fiber base material,
The mixture was coagulated in water at 20° C., the solvent was removed, and after dehydration, it was dried under hot air at 130° C. to form a microporous layer with a thickness of 450 μm and good surface smoothness. Thereafter, a phosphorus-containing nitrogen-containing compound (manufactured by Dainippon Ink Co., Ltd.: Frame Guard VF-74>10 parts by weight) and an organic phosphorus compound (
Manufactured by Dainippon Ink Co., Ltd.: Frame card 5316-5) 5 parts by weight, melamine resin 2 parts by weight, catalyst 0. Impregnated with a blended solution consisting of 2 parts by weight and 85 parts by weight of water, squeezed to a wet pickup rate of 80%, dried at 130°C for 3 minutes, and then heat-treated at 150°C for 2 minutes to obtain a polyester/rayon blend fiber. treated with flame retardant treatment. On the other hand, on the release paper with aperture, softening temperature 170℃ 1100%
Per 100 parts by weight (polyurethane solid content) of polyester polyurethane with a modulus of 40 kg/d (manufactured by Dainichiseika Kaisha, Ltd.: Rezamin ME823), 10 parts by weight of antimony dioxide (manufactured by Suzuhiro Chemical Co., Ltd.: AT-3B), phosphorus-containing bromine A polyurethane solvent solution with a solid content of 25% (the solvent is A coating solution consisting of a mixed solvent of dimethylformamide and methyl ethyl ketone was applied using a knife coater to a dry thickness of 20 μm, and dried with hot air at 90° C. for 2 minutes to form a polyurethane film layer. On the upper surface of this polyurethane film layer, the wet microporous layer of the sheet having the wet microporous layer is bonded by thermocompression at 160°C while heating, and then a release paper is placed #J# and flame retardant is applied to the sheet surface. A light-shielding curtain was obtained by transferring and laminating a polyurethane film layer containing . Comparative Example 1 Instead of the bromine-containing urethane compound, the same weight of halogen-containing condensed organic phosphoric acid ester (manufactured by Ohe Kagaku Co., Ltd.: CR-50) was used.
A light-shielding curtain was obtained in the same manner as in Example 1 except that 5> was used. Comparative Example 2 A light-shielding curtain was obtained by processing in the same manner as in Example 2, except that the crosslinking side was not added to the coating liquid for forming the wet microporous layer and the film layer. Comparative Example 3 A one-sided coarsely brushed fabric of a fiber base material made of a woven fabric with a basis weight of 180 g/rrf made of flame-retardant polyester fiber obtained by copolymerizing a phosphorus compound with polyester was coated with a softening temperature of 140°C.
, 100% polyester polyurethane with a modulus of 35 kg/cd (manufactured by Dainippon Ink Co., Ltd.: Crisbon MP-7
25) Per 100 parts by weight (polyurethane solid content), 30 parts by weight of bromine-containing urethane compound (DFR-10015), anionic surfactant (Crisbon Assister 5D)
-11) Prepare a coating solution consisting of a polyurethane solvent solution (solvent is dimethylformamide) with a solid content of 20% containing 3 parts by weight and 15 parts by weight of a black colorant (Dylac color), and add 0.8+u+ It was applied to a thickness of . After applying the above coating liquid onto the one-sided rough-raised fabric of the fiber base material,
It was coagulated in water at 20°C, the solvent was removed, and after dehydration, it was dried under hot air at 110°C to form a microporous layer with a thickness of 360 μm. On the other hand, on a flat release paper, a softening temperature of 130'C, 1
00% polyester polyurethane with a modulus of 20 kg/cj (manufactured by Dainippon Ink Co., Ltd.: Crisbon 5116EL
) A polyurethane solvent solution with a solid content of 19% containing 30 parts by weight of a bromo-containing urethane compound (DFR-10013) and 20 parts by weight of a light-colored coloring agent (Dilac TV Color) per 100 parts by weight (urethane solid content) (the solvent is A coating solution consisting of a mixed solvent of dimethylformamide and methyl ethyl ketone was applied using a knife coater to a dry thickness of 15 μm, and the polyurethane film layer was formed by drying with hot air at 90°C for 2 minutes. After bonding the wet microporous layer of the sheet having the wet microporous layer to the upper surface by thermocompression bonding at 120° C. while heating, the release paper is peeled off and a polyurethane film containing a flame retardant is formed on the sheet surface. The layers were transfer laminated to obtain a blackout curtain. The flame resistance, hydrolysis resistance, light resistance, and bloom resistance of each of the blackout curtains obtained in Example 1.2.3 and Comparative Example 1.2.3 were tested under the conditions shown below. Results first
It is shown in Table and Table 2. In addition, in the blank test in Table 1, after leaving the blackout curtain at room temperature for 2 days, the polyurethane coating surface was abraded using a taper type abrasion tester under the conditions of abrasion wheel C3-10, load of 1 kg, and number of abrasion cycles of 500. Shows the state of surface wear during the test.

[Flame resistance test]

The test was conducted according to method A-1 (45' micro burner method) according to JIS-L-1091. That is, measure the afterflame time (3 seconds or less), residue time (5 seconds or less), and carbonized area (30 cd or less) after heating for 1 minute, and then measure the afterflame time (3 seconds or less) after 3 seconds of flaming. ,
The residue time (5 seconds or less) and carbonized area (3M or less) were measured, and if these values were in parentheses, the combustion test was passed. In addition, the washing process for evaluating washing resistance is: in the case of washing with water, 15 minutes x 5 times according to JIS-L-1042, and in the case of dry cleaning, 1 time according to JIS-L-1042.
After repeated washing for 5 minutes x 5 times, it was subjected to a flammability test and evaluated in the same manner as above.

[Hydrolysis resistance test]

After leaving the blackout curtain sample piece at room temperature for 2 days, the relative humidity was 9.
5% and a temperature of 70°C for 3 weeks, and then the polyurethane coated surface of the sample piece was subjected to an abrasion test using a Taber type abrasion tester under the conditions of a C3-10 abrasion wheel, a load of 1kg, and 500 abrasion cycles. , the state of surface wear was observed.

[Light resistance test]

After leaving the blackout curtain sample piece at room temperature for 2 days, it was irradiated with light for 200 hours using a fade meter with a black panel temperature of 63°C, and then the polyurethane coating surface of the sample piece was tested with a taper-type abrasion tester using a wear ring C8-. 10. A wear test was conducted under the conditions of a load of 1 kg and 500 wear cycles, and the state of surface wear was observed. The surface abrasion state after the hydrolysis resistance test, light resistance test, and blank test was determined based on the following criteria. ○...No abnormality on the surface. Δ...Significant damage occurred on the surface. ×: Worn to the extent that the base material is exposed.

[Bloom resistance test]

After the light-shielding curtain sample piece was left at room temperature for 2 months, the surface condition based on the presence or absence of flame retardant bloom was visually observed and judged according to the following criteria. O: Bloom of flame retardant is not observed. ×...Bloom of flame retardant was observed. The softening temperature of polyurethane is measured by the following method. Prepare a polyurethane dry film with a thickness of 40 to 50 μm, cut it into a size with a diameter of 20 mm and a length of 50 mm, and hold one longitudinal edge with a gripping tool such as a clamp.
A load of 450 g/cd is applied to the other edge, and this is placed in a heating type opener and the temperature is increased at a rate of 2°C per minute. The softening temperature is the temperature at which the film stretches (or the temperature at which the film breaks). It is stipulated that (Left below) Table 1 II! 2 I + N Table 441 Table - (3) As is clear from these results, the light-shielding curtain of the present invention has excellent flame retardant properties, and due to the selection of flame retardant and the addition of crosslinking material, it has excellent durability. Furthermore, there was no oozing of flame retardant. Furthermore, by forming a wet microporous layer of polyurethane, it was possible to obtain a light-shielding curtain with excellent soundproofing and heat-insulating properties, which are the characteristics of polyurethane. [Effects of the Invention] As explained above, the flame-retardant blackout curtain of the present invention improves the heat resistance, heat deterioration resistance, etc. of polyurethane by regulating the composition and softening temperature of polyurethane, and further improves the composition and softening temperature of polyurethane. By using a bromo-urethane compound or a phosphorus-containing bromo-urethane compound as a flame retardant with excellent compatibility, and due to the synergistic effect when used in combination with antimony dioxide, it has excellent flame retardant properties. Unlike conventional blackout curtains, polyurethane does not become brittle or deteriorate due to the addition of flame retardants, and has hydrolysis resistance that does not accelerate deterioration.
It has excellent light resistance. Furthermore, by adding a crosslinking agent, the polyurethane and the flame retardant can be bonded together, making it possible to maintain superior flame retardant performance over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of the flame-retardant blackout curtain of the present invention, FIG. 2 is an explanatory view showing an example of the method for manufacturing the flame-retardant blackout curtain of the present invention, and FIG. It is an explanatory view showing a state before peeling. 1...Flame retardant blackout curtain 2...Fiber base material (curtain housing) 3...Polyurethane wet microporous layer 4...Polyurethane film layer 5...Release paper 6...Polyurethane solution 7. ... Doctor knife 8 ... Heating oven 9 ... Polyurethane layer for film layer formation 10 ... Sheet 11 on which a microporous layer was formed ... Heating roll 12 ... Heating oven

Claims (7)

[Claims] (1) A flame-retardant fiber base material or a flame-retardant treated fiber base material is used as the surface layer of the blackout curtain, and a wet microporous layer of polyurethane containing a flame retardant and a crosslinking agent is laminated on the back side of the base material. In addition, a polyurethane film layer containing a flame retardant and a crosslinking agent is provided on the back side of the wet microporous layer.
A flame-retardant light-shielding curtain characterized in that at least one of the wet microporous layer and the film layer is colored in a dark color. (2) The flame-retardant blackout curtain according to claim 1, wherein the polymeric diol constituting the polyurethane is a polyester diol. (3) The flame-retardant blackout curtain according to claim 1, wherein the polyurethane has a softening temperature of 170° C. or higher. (4) The flame retardant is a bromine-containing compound having at least one active hydrogen in the molecule or a bromine-containing urethane compound or a phosphorus-containing bromine-urethane compound which is a reaction product of a phosphorus-containing bromine compound and an organic polyisocyanate. The flame-retardant blackout curtain according to claim 1, characterized in that: (5) The flame-retardant blackout curtain according to claim 4, characterized in that antimony trioxide is used in combination as a flame retardant. (6) The crosslinking agent is an adduct of trimethylolpropane and tolylene diisocyanate, an adduct of trimethylolpropane and hexamethylene diisocyanate, an adduct of trimethylolpropane and isophorone diisocyanate, or a trimer of hexamethylene diisocyanate. The flame-retardant blackout curtain according to claim 1, characterized in that it is one or more selected types. (7) After applying a hydrophilic organic solvent solution of polyurethane containing a flame retardant and a crosslinking agent to a flame-retardant fiber base material or a fiber base material that can be flame-retardant treated, the solvent is removed by immersing it in water. At the same time, the polyurethane is coagulated to form a wet microporous layer of polyurethane, and a polyurethane containing a flame retardant and a crosslinking agent is formed between the microporous layers on a flame retardant fiber base material or a fiber base material made flame retardant during the process. A method for producing a flame-retardant blackout curtain, characterized by forming a film layer of.