72results about How to "Permanent Flame Retardancy" patented technology

The invention provides a high-strength stretch-proof flame-retardant textile. The flame-retardant textile is formed by weaving a flame-retardant composite yarn, wherein the flame-retardant composite yarn is formed by compounding a core yarn and a leather yarn and is one of a covering yarn and a fasciated yarn; the core yarn adopts a flame-retardant filament yarn as a raw material; the leather yarn adopts a flame-retardant short fiber as a raw material; and the weight ratio of the flame-retardant filament yarn to the flame-retardant short fiber is 30-90:10-70. Compared with the conventional flame-retardant textile, the high-strength stretch-proof flame-retardant textile has higher strength and overcomes the defects of difficult weaving, difficult dyeing and uncomfortableness of the high-strength fiber; the high-strength stretch-proof flame-retardant textile has permanent flame retardance which cannot decrease after the textile is washed, and better textile strength; the textile has soft and comfortable handfeel, rich color and good strength, meets the requirements of various flame-retardant clothes and related standards; the product has rich and varied appearances and is durable; and the combustion performance of the textile can meet the national standards of flame-retardant products.

The invention provides a preparation method of nylon resin, which comprises the following steps of mixing a polymer monomer, a catalyst, a reaction type flame retardant and a charring agent, and performing a condensation polymerization reaction to obtain the nylon resin, wherein the polymer monomer is one or more of compounds containing amino and carboxyl and lactam, or the polymer monomer is diacid and diamine; the reaction type flame retardant is one or more of the compounds with the structures of formulas (I)-(IV). According to method provided by the invention, the reaction type flame retardant is a phosphorus-containing flame retardant; after being copolymerized with a monomer, the reaction type flame retardant is stably stored in the polymer without being transferred or lost and has a permanent flame retardant property. Moreover, the reaction type flame retardant is polymerized in a polymer, causes little influence on the viscosity of the nylon resin and has excellent mechanical properties.

The invention discloses double-layer flame-retardant fabric with a water-repellent surface layer and a hydrophil inner layer, and a preparation technology thereof. The double-layer flame-retardant fabric comprises the surface layer and the inner layer, wherein the surface layer is composed of at least one of aramid fibers, polyimide fibers, polysulfonamide fibers, flame-retardant viscose and ; the inner layer is formed by mixing flame-retardant modacrylic fibers with chloride, Tencel fibers and partner fibers, and the partner fiber is one selected from flame-retardant nylon fibers, aramid fibers and polysulfonamide fibers; water-repellency of the surface layer is implemented by the technology comprising the steps of preparing three proofing auxiliary size, soaking surface layer yarn into the three proofing auxiliary size, drying with high temperature, weaving and hot rolling with rollers; and water absorption of the inner layer is implemented by the technology comprising the steps of preparing hydrophil and sweat-releasing auxiliary size, soaking inner layer yarn into the size, drying, weaving and decating. The double-layer flame-retardant fabric with the water-repellent surface layer and the hydrophil inner layer has the characteristics of being soft, comfortable, air and moisture permeable and skin-friendly, has multifunctional protection performance, and meanwhile is high in comfort, so as to be applicable to special protection clothing in industries of firefighting, military police, electric power and smelting.

The invention discloses a three-layer co-extrusion PVC-M tubular product for coal mine, characterized in that the tubular product comprises an antistatic inner layer, an antistatic outer layer and a PVC-M interlayer, wherein the antistatic inner and outer layer compositions comprise the following ingredients: 100 weight parts of PVC resin, 0.8-1.2 weight parts of heat stabilizer, 4-8 weight parts of toughening agent, 1.3-2.0 weight parts of lubricating agent, 5-10 weight parts of flow modifier, and 6 weight parts of nano conductive carbon black; the PVC-M interlayer composition comprises the following ingredients: 100 weight parts of PVC resin, 1.0-1.5 weight parts of heat stabilizer, 10-15 weight parts of toughening agent, 2.1-3.5 weight parts of lubricating agent, and 0-5 weight parts of filling agent. According to the invention, the composition of the tubular product has high strength, the shock resistance of the tubular product can be comparable to that of polyethylene antistatic tubular products for coal mine, the modulus reaches to 2231MPa, the tensile strength reaches to 46.3Mpa, the impact strength of the simple-supported beam reaches to 97.6Mpa, the mechanical property shows toughness and balance and permanent antistatic property, thus the requirements of the tubular product for coal mine are satisfied.

The invention relates to copolymerized flame-retardant polyamide and a preparation method thereof. The preparation method comprises the following steps: mixing a flame retardant salt with a polyamide6 oligomer and/or a polyamide 66 oligomer, and carrying out condensation polymerization to obtain copolymerized flame-retardant polyamide. The flame retardant salt is prepared from a DOPO derivative and diamine NH2R2NH2 through a high-temperature and high-pressure reaction. The temperature of the high temperature is 200-250 DEG C, and the pressure of the high pressure is 1.2-1.8 MPa. The structural formula of the finally obtained copolymerized flame-retardant polyamide is as follows. In the structural formula, x is the polymerization degree of the polyamide 6 oligomer, y is the polymerizationdegree of the polyamide 66 oligomer, and the structural formula of Rz is as follows. The preparation method disclosed by the invention is simple to operate, and the prepared product has excellent flame retardance, good impact resistance and processability.

The invention provides a permanent flame retardant anti-static light color fabric and a preparation method thereof. The fabric is prepared from, by mass, 97%-99% of raw materials and 1%-3% of electrically conductive filament; the raw materials comprise aramid fiber 1313 fiber accounting for 70%-80% by mass of the raw materials, aramid fiber 1414 fiber accounting for 5%-10% by mass of the raw materials and flame retardant polyester fiber accounting for 10%-20% by mass of the raw materials. Accordingly, the excellent anti-static property and permanent flame retardant property of the fabric are achieved, the appearance is improved, and wearing is comfortable.

The invention discloses flame retardant fabric which is interwoven by warps and wefts according to a certain pattern. The warps are perpendicular to the wefts. The warps are made of cotton yarn. The wefts are made of flame retardant polyester filament yarn. The flame retardant fabric is soft, comfortable and breathable, and has permanent flame retardancy and no pungent smell.

The present invention discloses one kind of flame retardant polyacrylic and polyester fiber and its production process. The production process includes adding antimony pentoxide colloid solution and dimethyl formamide water solution into the polymerized solution, filtering and spinning to produce flame retardant polyacrylic and polyester fiber containing flame retardant antimony pentoxide. By means of the synergistic flame retarding effect of antimony and chlorine, the present invention has greatly raised flame retardant performance, limiting oxygen index up to 30-34 % and excellent comprehensive performance. The present invention may find its wide application in different fields, especially in flame retardant fabric.

The invention relates to copolymerized flame-retardant polyamide and a preparation method thereof. The preparation method comprises the following steps: mixing a flame retardant salt with a polyamide66 oligomer and/or a polyamide 6 oligomer, and carrying out condensation polymerization to obtain copolymerized flame-retardant polyamide; wherein the flame retardant salt is prepared from N, Ndi (6aminohexyl) phenyl phosphoramide and binary acid HOOCR1COOH through a high-temperature and high-pressure reaction; wherein the temperature of the high temperature is 210-220 DEG C, and the pressure of the high pressure is 1.7-1.9 MPa; wherein in the structural formula, x is the polymerization degree of the polyamide 66 oligomer, y is the polymerization degree of the polyamide 6 oligomer, and the structural formula of Rz1 is as follows: the structural formula of Rz2 is as follows: the preparation method disclosed by the invention is simple to operate, and the prepared product has excellent flameretardance, good impact resistance and processability.