Preparation method of natural cellulose fiber with flame-resistant function

Abstract

The invention relates to a manufacture method of a native cellulose fiber with a flameproof function. The manufacture method comprises the following steps of: mixing wood pulp with an N-methylmorpholine-N-oxide monohydrate (NMMO) solvent into slurry, removing water by using a vacuum film evaporator to form a spinning viscous solution, extruding the spinning viscous solution from a spinning nozzle by adopting a dry spraying wet type spinning method, regenerating, washing and drying by using a coagulating bath, padding the spinning viscous solution and an N-hydroxymethyl-3-(dimethoxyphosphoryl) propanamide flameproof compound, sequentially carrying out drying, roasting, neutralizing, soaping, washing and drying, and finally, carrying out alkali washing, washing and drying and oiling to manufacture the native cellulose fiber with a long-effect type flameproof function. The native cellulose fiber and the N-hydroxymethyl-3-(dimethoxyphosphoryl) propanamide flameproof compound can generate a special crosslinking reaction in a manufacture process, and the flameproof effect of the native cellulose fiber has the flameproof effect completely according with the testing standards of ASTM (American Society for Testing Material) D6413-1999 and ASTM D2863-1995; meanwhile the native cellulose fiber can be naturally degraded after being discarded, and becomes an environment-friendly material which is harmless to the nature environment.

Description

technical field [0001] The invention relates to a method for preparing natural cellulose fibers with flame-resistant function, which belongs to the technical field of green and environment-friendly fiber manufacturing. The cellulose fiber is padded, dried, baked, neutralized, soaped, washed with water and dried to make the active N-methylol and natural cellulose fiber have a cross-linking reaction, and then through alkali washing, water washing, drying, After oiling and coiling, it can be made into natural cellulose fiber with long-lasting flame-resistant function. Background technique [0002] The flame-resistant fiber production method currently used for fire-proof and flame-resistant fabrics or fabrics is made by uniformly mixing polyacrylonitrile fibers and polyamide fibers mechanically, such as shown in Taiwan Invention No. I248488, or directly with multiple bundles of polyacrylonitrile fibers It is made by rolling traction and heating in the rolling step, as shown in ...

AI Technical Summary

Problems solved by technology

[0002] The flame-resistant fiber production method currently used for fireproof and flame-resistant fabrics or fabrics is made by uniformly mixing polyacrylonitrile fibers and polyamide fibers mechanically, such as shown in Taiwan Invention No. I248488, or directly with multiple bundles of polyacrylonitrile fibers It is made by rolling traction and heating in the rolling step, as shown in Taiwan Invention Announcement No. 182661, or by adding a flame retardant to polyolefin and co-polymerizing, as shown in Taiwan Invention Announcement No. 191223. In addition , there are some less costly manufacturing methods, but the flame retardant effect is poor, and the flame retardant is directly coated on the surface of the aforementioned various synthetic fibers to achieve the flame retardant effect

[0003] However, all of the above-mentioned flame-resistant fibers are non-dissolving fibers, and the waste after use cannot be naturally degraded and pollutes the environment. Since countries have successively formulated technical regulations on textile flammability, if the products do not meet the requirements of these regulations, they will be blocked. enter the country's market

Therefore, the demand for textiles with flame-retardant properties continues to increase, but at the same time it also leads to a large increase in non-dissolving fiber waste and causes more serious environmental pollution problems

In addition, some flame retardant effects are achieved by adding flame retardants or surface coatings. Although the manufacturing cost is relatively low, the flame retardant effect is relatively poor, which will cause hidden dangers to home or personal safety.

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