JPH04119172A - Flame-proofing light-shielding curtain - Google Patents

Abstract

PURPOSE:To obtain the subject curtain having durable flame-proofing effect by using a flame-retardant fiber substrate as the surface layer of the curtain, laminating a skin layer containing a specific modified material to the back face of the substrate with an adhesive layer having a specific component containing a flame-retardant and coloring the adhesive layer or the skin layer in dark color. CONSTITUTION:A flame-retardant fiber substrate or a fiber substrate subjected to flame-retarding treatment is used as the surface layer of a curtain. A polyurethane skin layer containing a flame retardant and a modified polyisocyanate is laminated to the back face of the substrate using a two-pack type polyurethane adhesive containing a flame retardant. One of the adhesive layer and the skin layer is colored in dark color to obtain the objective flame-retardant light-shielding curtain having excellent hydrolysis resistance and light resistance. The polymer diol constituting the urethane is preferably a polyester diol having a softening point of >=170 deg.C to attain heat-resistance. The flame retardant is e.g. a bromine-containing urethane produced by reacting an organic polyisocyanate with a bromine-containing compound or a phosphorus-containing and bromine-containing compound having one or more active hydrogen atoms.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a flame-retardant blackout curtain that has excellent durability and long-lasting flame-retardant effect. [Prior art and problems] Traditionally, blackout curtains used in public places such as theaters and hotels have been required to have flame retardant properties.
In addition, as a blackout curtain suitable for use in such places, a fiber base material (referring to curtain fabric) is used as the surface layer (the curtain is attached so that the surface layer faces indoors) in the laminated structure of the curtain. Generally used is a polyurethane layer laminated with a dark colored polyurethane layer. Conventionally, when manufacturing blackout curtains with the above configuration, in order to impart flame retardant properties to the blackout curtains, the fiber base material is treated with flame retardant treatment, and a flame retardant is added to polyurethane to make it flame retardant. . Conventionally, flame retardants added to polyurethane include halogen compounds such as hexachlorobenzene, hexabromobenzene, pentabromoethylbenzene, 1,2-dibromoethylene, and 1,2,3-tribromobutane, and trimethyl phosphate. , phosphate ester compounds such as triethyl phosphate, triphenyl phosphate, tricresyl phosphate, tris (2-chloroethyl) phosphate, tris (dichloropropyl) phosphate, tris (2,3-dibromopropyl) phosphate, tris (chlorophenyl) phosphate ,1,
2.4-Tribromophosphate, tris(chloropropyl)phosphate, tetrakis(2-chloroethyl)
Halogen-containing phosphoric acid ester compounds such as ethylene diphosphate, inorganic compounds such as antimony trioxide, antimony pentoxide, aluminum hydroxide, calcium carbonate, clay, and barium sulfate are used.However, these flame retardants cannot be used with polyurethane. If 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 these, light resistance deterioration, heat resistance deterioration, etc. tend to be accelerated at the same time, so that the durability performance of polyurethane decreases, and there are drawbacks such as polyurethane becoming brittle and deteriorating. In addition, these flame retardants have very 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. There was also the problem that a so-called bloom phenomenon occurred. [Means for Solving the Problems] An object of the present invention is to provide a flameproof blackout curtain that solves the above-mentioned conventional drawbacks. That is, the present invention provides: (1) A flame-retardant fiber base material or a flame-retardant treated fiber base material is used as the surface layer of the curtain, and an adhesive layer of two-component polyurethane containing a flame retardant is provided on the back side of the base material. A flame-retardant light-shielding curtain characterized in that a film layer of polyurethane containing a flame retardant and a modified polyisocyanate is laminated through the film, and at least one of the adhesive layer and the film layer is colored in a dark color. (2) Claim l&! characterized in that the polymeric diol constituting the polyurethane is a polyester diol.
Flame retardant blackout curtains. (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 phosphorus-containing bromine-urethane which is a reaction product of a phosphorus-containing bromine compound and an organic polyisocyanate. The flame-retardant blackout curtain according to claim 1, which is a compound. (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 flame-retardant blackout curtain according to claim 1, wherein the modified polyisocyanate is a urethane adduct formed from a reaction product of tolylene diisocyanate, hexamethylene diisocyanate, or sisophorone diisocyanate and trimethylolpropane. . 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 a flame-retardant blackout curtain 1 of the present invention, which has a two-component polyurethane adhesive layer 3 containing a flame retardant on the back side of a fiber base material 2. Polyurethane film layer 4 containing modified isocyanate
It has a laminated structure. Examples of the fibers constituting the fiber base material 2 include cotton,
Examples include natural fibers such as hemp, recycled fibers such as rayon, cotton wool, and acetate, and synthetic fibers such as polyester, polyamide, and polyacrylonitrile. It can be constructed from woven or entangled knitted fabric, woven fabric, woven fabric, or the like. The fiber base material 2 may also be one whose front or back surface is raised or raised as required. In the present invention, these fiber base materials 2 must be flame retardant, and the method for making the fiber base materials 2 flame retardant is as follows: and (2) a method of post-treating the fiber base material 2 with an H flame retardant to impart flame retardancy. When flame retardant properties are imparted by method (2), flame retardant fibers may be obtained by copolymerizing polyester with flame retardants such as phosphorus compounds or halogen compounds, or by spinning a mixture of these flame retardants. Flammable polyester spun yarn or filament alone or blended with other fibers, modacrylic synthetic fibers made of vinyl chloride-acrylonitrile copolymer fibers, polyfural synthetic fibers made of vinyl chloride-polyvinyl alcohol copolymer fibers, etc. The fiber base material 2 is constructed by knitting, weaving, and intertwining the fibers alone or in a blend. In addition, in order to impart flame retardancy by the method (2), the fiber base material 2 may be post-treated with a halogen compound, a halogenated phosphate ester compound, a phosphorus-containing nitrogen-containing compound, etc., or a mixture thereof. As a treatment method, methods such as an impregnation method, a coating method, and a gravure method can be adopted. If these flame retardants are attached in excess, there is a risk that the flame retardant will migrate to the polyurethane film layer and deteriorate the polyurethane adhesive layer and the polyurethane film layer 4. Therefore, the adhesion rate of the flame retardant to the fiber base material 2 is 5. ~20% by weight
It is preferable that 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 will be softer and it will have a richer sense of volume. can get. The polyurethane adhesive layer 3 and the polyurethane film layer 4 contain a flame retardant, and the flame retardant added to impart flame retardancy includes a bromine-containing urethane compound that is compatible with polyurethane and does not cause deterioration; Alternatively, there are phosphorus-containing bromourethane compounds, such as the reaction product of 2.2-bis(4-hydroxy-3°5-dibromophenyl)propane and tolylene diisocyanate, 2.3
- reaction product of dibromopropanol and hexamethylene diisocyanate, reaction product of 2,2-bis(4-hydroxyethoxy-3,5 dibromophenyl)propane and hexamethylene diisocyanate, tetrakis (
2,2-bis(4-
A reaction product of hydroxy-3,5-dibromophenyl)propane, a phosphate polyol, and hexamethylene diisocyanate, etc. can be used. Antimony trioxide can be used in combination with these bromo-urethane compounds and phosphorus-containing bromo-urethane compounds. When antimony trioxide is used in combination with a bromine-containing urethane compound or a phosphorus-containing bromine-containing urethane compound, the bromine-based flame retardant and antimony trioxide combine during combustion to produce antimony bromide with a high boiling point and to shield the surface. It is thought to be effective and work to cut off the supply of oxygen.
Due to the synergistic effect, higher flame retardant performance can be obtained with a smaller amount of added flame retardant. Furthermore, antimony trioxide also combines with the flame retardant used in the flame retardant treatment of the fiber base material during combustion to exhibit a synergistic effect. The bromine-containing urethane compound or phosphorus-containing bromine-urethane compound of the M fuel agent contained in the polyurethane adhesive layer 3 and the polyurethane film layer 4 has a bromine content of 10 to
40%, and a compound with a phosphorus content of 1 to 10% is preferable, and the amount added is 1 part by weight per 100 parts by weight of polyurethane solid content.
It is preferably added in an amount of 5 to 40 parts by weight, and when antimony trioxide is used in combination, it is preferably added in an amount of 30 to 60 parts by weight based on the bromo-urethane compound or the n-containing bromo-urethane compound. Examples of the above-mentioned bromine-containing urethane compound or phosphorus-containing bromine-containing urethane compound used in the present invention include DFR-100Is and DFR-100 manufactured by Dainichiseika Chemical Co., Ltd.
Examples include flame retardants having a urethane bond in the molecule, such as 2S, DFR-1003S (product name), and Frame Guard PU-300 (product name) manufactured by Dainippon Ink. Furthermore, in the present invention, in addition to the flame retardant, a modified polyisocyanate is added to the polyurethane film layer 4, so that active hydrogen in the molecules of polyurethane and bromo-urethane compounds or phosphorus-containing bromo-urethane compounds and the modified polyisocyanate are added. By reaction with the isocyanate group in the molecule,
Furthermore, the purpose is to three-dimensionally bond polyurethane and flame retardant with a polyisocyanate modified product to prevent the flame retardant from falling off and maintain the flame retardant effect more sustainably. Furthermore, by adding a modified polyisocyanate, it is possible to improve heat resistance, heat deterioration resistance, etc. as a crosslinking effect of polyurethane. Examples of modified polyisocyanates include urethane adducts made of a reaction product of tolylene diisocyanate and trimethylolpropane, urethane adducts made of a reaction product of hexamethylene diisocyanate and trimethylolpropane, or isophorone diisocyanate and trimethylol. Examples include urethane adducts made of reaction products with propane. These polyisocyanate modified products can be used alone or as a mixture. The modified polyisocyanate contained in the polyurethane film layer 4 is preferably a urethane adduct with an isocyanate content of 12 to 14%, and the amount added is preferably 3 to 20 parts by weight per 100 parts by weight of the polyurethane solid content. If the amount of polyisocyanate modified product added is less than 3 parts by weight, the crosslinking density will be low and there will be no effect;
If the amount is more than 1 part by weight, the crosslinking density becomes too high and the polyurethane becomes hard, and the pot life of the polyurethane solution becomes short, which is disadvantageous. The polyisocyanate modified products used in the present invention include, for example, Coronate, Coronate H, manufactured by Nippon Polyurethane Co., Ltd., Desmodur L, Desmodur N1, Sumidur N-7, manufactured by Sumitomo Bayer Urethane Co., Ltd.
5. Manufactured by Dainippon Ink: Crisbon NX, Parnock D
Examples include N-950. Polyurethane is obtained by reacting a polymeric diol such as a polyester or polyether with an organic diisocyanate and an active hydrogen compound as a chain extender.
The polyurethane forming the adhesive layer 3 and the film layer 4 of the present invention is limited to polyester polyurethane. Examples of the polymer diols used in the polyester polyurethane include condensed polyester diols, polymerizable lactone polyester diols, and polycarbonate diols. Polyurethanes using these polymeric diols are generally excellent in heat resistance, heat deterioration resistance, oxidation deterioration resistance, etc., and are cited as essential conditions for making polyurethane flame retardant. 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 flame-retardant blackout curtain of the present invention. In addition, the softening temperature of polyester polyurethane is 170
℃ or above, preferably 190°C or above. Since polyurethane generally has a combustible property, in addition to adding a flame retardant to make it flame retardant, in order for the polyurethane itself to become more flame retardant, Polyurethane is heat resistant and
As mentioned above, it is necessary to have excellent heat deterioration resistance, and for this purpose, it is necessary to raise the softening temperature of polyurethane as a function of increasing the decomposition temperature of polyurethane. The polyurethane constituting the adhesive layer 3 is a polyester polyurethane for the reasons mentioned above, and a two-component polyurethane is used, and the 100% modulus of this polyurethane is 10 to 60 kg/cil! The crosslinking agent used in the two-component polyurethane is preferably an adduct of trimethylolpropane (TMP) and tolylene diisocyanate (TDI), or an adduct of TMP and hexamethylene diisocyanate (HMDI). Examples include an adduct, an adduct of TMP and isophorone diisocyanate (IPDI), and a trimer of HMDI. The amount of the crosslinking agent added is 7 to 25 parts by weight per 100 parts by weight of the polyurethane solid content. If the amount of crosslinking agent is too small, the heat resistance of the polyurethane adhesive layer 3 will be poor, which will affect the flame retardant performance.If the amount of crosslinking agent is too large, the texture of the blackout curtain will become too hard, which is undesirable. In order to promote the reaction with the crosslinking agent, an appropriate amount of crosslinking promoter (catalyst) may be used in the type polyurethane, if necessary. As this crosslinking accelerator, it is preferable to add an amine catalyst rather than a metal catalyst in consideration of the durability of the polyurethane.In the two-component polyurethane, antioxidants, light stabilizers, ultraviolet absorbers, etc. are added as necessary. Various additives such as anti-hydrolysis agents and anti-hydrolysis agents can be added. Note that the flame retardant bromine-containing urethane compound or phosphorus-containing bromine-containing urethane compound contained in the polyurethane adhesive layer 3 both have active hydrogen in their molecules, so they can be used together with the polyisocyanate as the crosslinking agent in a two-component type. It also reacts with urethane and is incorporated into the polyurethane structure, providing excellent flame retardant durability. To the polyurethane adhesive layer 3, an opaque dark pigment, mainly a black pigment, can be added for the purpose of light shielding, and light shielding powder such as metal powder can also be mixed as necessary. The thickness of the polyurethane adhesive layer 3 is 10 to 100 μm in view of the light blocking effect and the adhesive strength with the fiber base material.
is preferred. The polyurethane film layer 4 contains a flame retardant containing the same bromine-containing urethane compound as contained in the adhesive layer 3, a phosphorus-containing bromine-containing urethane compound alone, or a combination of these and antimony trioxide. added. The polyurethane constituting the polyurethane film layer 4 is preferably a Li-type polyurethane, and the 100% modulus of the polyurethane is preferably 30 to 200 kg/cj,
Moreover, its thickness is 5 to 100 mm. Various additives such as antioxidants, light stabilizers, ultraviolet absorbers, and hydrolysis inhibitors can be added to the polyurethane film layer 4, preferably un, as required. The polyurethane film layer 4 can be colored with a pale color based on opaque pigments, including a light-shielding effect, and light-shielding powders such as carbon powder and gold-N powder can also be mixed as necessary. The polyurethane film layer 4 is formed by applying a one-component polyurethane solution containing a flame retardant, a modified polyisocyanate, a coloring agent, etc. for forming a polyurethane film layer onto a flat or diaphragm release paper using a doctor knife or the like to obtain a uniform thickness. After that, it is dried in a heating oven to form a polyurethane film.Next, a two-component polyurethane solution containing a flame retardant, a crosslinking agent, a coloring agent, etc. for forming a polyurethane adhesive layer is applied to the polyurethane film layer 4 using a doctor knife. It can be formed by a transfer method in which the polyurethane adhesive layer 3 is coated to a uniform thickness by a method such as the above, and then bonded to the fiber base material 2, the two-wave polyurethane adhesive layer 3 is reacted and cured, and then the release paper is peeled off. Hereinafter, the present invention will be explained in more detail by giving specific examples. Example 1 Polyester polyurethane (softening temperature: 190°C, 1100% modulus: 70 kg/d) was placed on a flat release paper.
25 parts by weight of a bromine-containing urethane compound (DFR-100Is, manufactured by Dainippon Ink Co., Ltd.), 1 part by weight of a polyisocyanate modified product (Crisbon NX, manufactured by Nippon Ink Co., Ltd.) per 100 parts by weight of solid content
A polyurethane solution containing 2 parts by weight and 20 parts by weight of a light coloring colorant (manufactured by Dainippon Ink Co., Ltd.: Dairakku TV Color) was applied with a knife coater to a dry thickness of 15 μm, and then heated at 90°C for 2 minutes. A polyurethane film was formed by drying with hot air. The surface of this polyurethane film has a 100% modulus of 2.
5 kg/c4 polyester-based polyurethane two-component adhesive (Dainichiseika Chemical Co., Ltd.: Rezamin UD-603) was added with 25 parts by weight of a bromine-containing urethane compound (DFR-1001S) and a cross-linking agent (per 100 parts by weight of solid polyurethane). manufactured by Nippon Polyurethane Co., Ltd.: Coronet) L) 18 parts by weight, crosslinking accelerator (dimethylethanolamine) 0.9 parts by weight, and
Black-based colorant (manufactured by Dainippon Ink Co., Ltd.: Dailac U)
E color) A polyurethane solution containing 25 parts by weight was applied using a knife coater to a dry thickness of 35 μm, and after drying with hot air at 80°C for 1.5 minutes, the adhesive-coated side was After bonding with a fiber base material and further aging at 60° C. for 48 hours to reaction-cure the adhesive, the release paper was peeled off to obtain a light-shielding curtain. As the fiber base material, a woven fabric having a basis weight of 170 g/nf and made of flame-retardant polyester fiber obtained by copolymerizing polyester with a phosphorus compound was used. Example 2 A polyester polyurethane (Rezamin ME-823, manufactured by Dainichiseika Chemical Co., Ltd.) with a softening temperature of 170°C and a 100% modulus of 40 kg/cj was coated on a release paper with a diaphragm, and antimony trioxide (Rin) was added per 100 parts by weight of solid content. Manufactured by Yukagakusha=AT-
3B) 10 parts by weight, 20 parts by weight of phosphorus-containing bromourethane compound (manufactured by Dainippon Ink Co., Ltd.: Frame Guard PU-300), 1 part by weight of polyisocyanate modified product (Crisbon NX)
A polyurethane solution containing 0 parts by weight and 20 parts by weight of a light colored coloring agent (Guirac TV Color) was applied with a knife coater to a dry thickness of 20 pm, and dried with hot air at 90°C for 2 minutes. A polyurethane film was formed. The surface of this polyurethane film has a 100% modulus of 2.
A two-component adhesive of 6 kg/cm polyester-based polyurethane (manufactured by Dainippon Ink Co., Ltd.: Crisbon 4010HV), per 100 parts by weight of polyurethane solid content, 10 parts by weight of antimony trioxide (AT-3B), and a phosphorus-containing bromine urethane compound. (Frame Guard PU-300) 20 parts by weight,
A polyurethane solution containing 20 parts by weight of a crosslinking agent (Coronet L), 1 part by weight of a crosslinking accelerator (dimethylethanolamine), and 20 parts by weight of a blackish coloring agent (Guirac UE Color) was dried to a thickness of 40 μm. After applying with a knife coater so that After the agent was reacted and cured, the release paper was peeled off to obtain a light-shielding curtain. In addition, as the above-mentioned fiber base material, a coarsely brushed polyester fabric with a basis weight of 200 g/rd was immersed in a treatment solution containing 15% by weight of a phosphorous-containing nitrogen-containing flame retardant (Frame Guard VF-74, manufactured by Dainippon Ink Co., Ltd.). and the wet pickup rate is 80
%, pre-dried at 130°C for 3 minutes, and then baked at 150°C for 2 minutes to make it flame retardant. A light-shielding curtain was obtained in the same manner as in Example 2, except that the same amount of chlorinated phosphate ester compound (manufactured by Asahi Glass Co., Ltd.: Thermolin-101) was used in place of antimony oxide and the phosphorous-containing bromourethane compound in a comparative example. Ta. Comparative Example 2 Antimony trioxide (AT) was applied to a polyether polyurethane (manufactured by Dainichiseika Co., Ltd.: Rezamin ME-8115LP) with a softening temperature of 170°C and a 1100% modulus of 80 kg/cd on a flat release paper per 100 parts by weight of solid content. -3
B) 13 parts by weight, bromine-containing urethane compound (DFR-1
0013) A polyurethane solution containing 25 parts by weight and 20 parts by weight of a light colored coloring agent (manufactured by Dainichiseika Chemical Co., Ltd.; Seikasepun DUT Color) was coated with a knife coater so that the dry thickness was 15 μm, A polyurethane film was formed by drying with hot air at 90°C for 2 minutes. The surface of this polyurethane film has a 100% modulus of 2.
4 kg/cj polyether-based polyurethane two-component adhesive (manufactured by Dainippon Ink Co., Ltd.: Crisbon 4365-T), per 100 parts by weight of polyurethane solid content, 13 parts by weight of antimony trioxide (AT-3B), and bromine-containing urethane. 25 parts by weight of compound (DFR-100Is), 18 parts by weight of crosslinking agent (Coronate), 1.5 parts by weight of crosslinking accelerator (dimethylethanolamine), and 25 parts by weight of blackish coloring agent (Seika Seven DUT Color). A polyurethane solution containing the above was applied using a knife coater to a dry thickness of 35 μm, and after drying with hot air at 80°C for 1.5 minutes, the adhesive side was bonded to the fiber base material, After further aging at 60° C. for 48 hours to reaction-cure the adhesive, the release paper was peeled off to obtain a light-shielding curtain. In addition, the above-mentioned fiber base material is made of flame-retardant polyester fiber obtained by copolymerizing polyester with a phosphorus compound, and has a basis weight of 170 g/
rrf woven fabric was used. Example 3 Polyester polyurethane (manufactured by Dainippon Ink Co., Ltd.: Crisbon 5516) with a softening temperature of 130°C and a 100% modulus of 30 kg/cj was coated on a flat release paper with a solid content of 1
00 parts by weight, 10 parts by weight of antimony trioxide, phosphorus-containing bromine urethane compound (Frame Guard PU-30
0) Apply a polyurethane solution containing 20 parts by weight and 20 parts by weight of a light-colored coloring agent (Guirac TV Color) with a knife coater to a dry thickness of 15 μm, and heat-air at 90°C for 2 minutes. After drying to form a polyurethane film, a two-component adhesive method (Chrisbon 4365-1) of polyether polyurethane having a 100% modulus of 24 kg/cj was applied to the surface of the polyurethane film.
T) per 100 parts by weight of polyurethane solid content, 10 parts by weight of antimony trioxide, 20 parts by weight of phosphorous-containing bromine urethane compound (Frame Guard PU-300), crosslinking agent (
A polyurethane solution containing 18 parts by weight of crosslinking accelerator wi (dimethylethanolamine), and 25 parts by weight of a blackish coloring agent (Seika Seven DUI Color) was dried to a thickness of After coating with a knife coater to a thickness of 35 μm and drying with hot air at 80°C for 1.5 minutes, the adhesive side was bonded to the fiber base material and further aged at 60°C for 48 hours to form an adhesive. After reaction-curing, the release paper was peeled off to obtain a light-shielding curtain. In addition,
As the above-mentioned fiber base material, a rough brushed polyester fabric with a basis weight of 200 g/rd was immersed in a treatment solution containing 15% by weight of a phosphorus- and nitrogen-containing flame retardant (Frame Guard VF-74).
Squeeze the liquid so that the wet pickup rate is 80%,
The material used was dried at 130° C. for 3 molecules and then baked at 150° C. for 2 minutes to make it flame retardant. The flame resistance, hydrolysis resistance, light resistance, and bloom resistance of each of the blackout curtains obtained in Example 1.2 and Comparative Example 1.2.3 were tested under the conditions shown below. The results are shown in Tables 1 and 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 ring cs-to, load of 1 kg, and number of abrasion cycles of 500. Shows the state of surface wear during the test.

[Flame resistance test]

Tested according to A-1 method (45" micro burner method) according to the provisions of JIS-L-1091. Namely, afterflame time (3 seconds or less) and residual flame time (5 seconds or less) after heating for 1 minute. , Measure the carbonized area (30c4 or less), and then measure the afterflame time (3 seconds or less) after 3 seconds of ignition,
The residue time (5 seconds or less) and carbonized area (301 or less) were measured, and if the values were within these (parentheses), the combustion test was passed. In addition, the washing process for evaluating washing resistance is: in the case of cold washing, repeated washing for 15 minutes x 5 times according to JIS-L-1042, and in the case of dry cleaning, repeated washing for 15 minutes x 5 times according to JIS-L-1018. After that, subjected to flammability test,
Evaluation was made 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 coating surface of the sample piece was subjected to an abrasion test using a taper type abrasion tester under the conditions of a C3-10 abrasion wheel, a load of 1 kg, 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 coated surface of the sample piece was tested using a tapered abrasion tester with abrasion ring C3-10. A wear test was conducted under the conditions of a load of 1 kg and 500 wear cycles, and the state of wear on the surface was observed. The surface abrasion state after the hydrolysis resistance test, light resistance test, and blank test was determined based on the following criteria. 0...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 pieces were left at room temperature for two 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 50μ, cut it into a size of 20cm wide and 50cm long, hold one longitudinal edge with a gripping tool such as a clamp, and add 450g to the other edge. A load of /cj was applied, and the film was placed in a heating oven and the temperature was increased at a rate of 2°C per minute.The temperature at which elongation occurred in the film (or the temperature at which the film was cut)
is defined as the softening temperature. (Left blank below) Table 1, Table (1), Table (2), Section H3) As is clear from these results, the light-shielding curtain of the present invention has excellent flame retardant properties and is free of flame retardants. The selected materials had excellent hydrolysis resistance and light resistance, and did not ooze out flame retardant. [Effects of the Invention] As explained above, the flame retardant blackout curtain of the present invention specifies the composition and softening temperature of polyurethane, improves the heat resistance and heat deterioration resistance of polyurethane, and further improves compatibility with polyurethane. By using a bromo-urethane compound or a phosphorus-containing bromo-urethane compound as a flame retardant with excellent flame retardant properties, and due to the synergistic effect of using it in combination with antimony trioxide, it has excellent flame retardant properties and can be used as a blackout curtain using conventional polyurethane. When flame retardants are added, polyurethane does not become brittle or deteriorate, and has excellent hydrolysis resistance and light resistance (does not accelerate hydrolytic deterioration or photodeterioration). Further, since the flame retardant blackout curtain of the present invention has excellent compatibility between polyurethane and flame retardant, bloom of the flame retardant is difficult to occur, and excellent flame retardant performance can be maintained for a long period of time.

[Brief explanation of the drawing]

The figure is a cross-sectional view of one embodiment of the flameproof blackout curtain of the present invention. 1...Flame retardant blackout curtain 2...Fiber base material (curtain fabric) 3...
・Polyurethane adhesive layer 4...Polyurethane film layer

Claims (6)

[Claims] (1) A flame retardant fiber base material or a flame retardant treated fiber base material is used as the surface layer of the curtain, and a flame retardant is added to the back side of the base material through an adhesive layer of two-component polyurethane containing a flame retardant. and a polyurethane film layer containing a modified polyisocyanate, and at least one of the adhesive 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) A bromine-containing urethane compound or a phosphorus-containing bromine-urethane compound in which the flame retardant is a reaction product of a bromine-containing compound having at least one active hydrogen in the molecule or 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 flame-retardant blackout curtain according to claim 1, wherein the polyisocyanate variant is a urethane adduct made of a reaction product of tolylene diisocyanate, hexamethylene diisocyanate, or isophorone diisocyanate and trimethylolpropane.