Flameproof polyacrylonitrile fibre and method for preparing same

Abstract

The invention discloses a flame-proof polyacrylonitrile fiber and its manufacturing method. Said fiber comprises at least 5%-25% by polyacrylonitrile weight of APP flame retardant, or APP flame retardant treated by silane coupler or titanate coupler, furthmore, comprises pentaerythritol, bi-pentaerythritol and like polyhydric alcohol compound, which has a APP-to-polyhydric alcohol ratio ranging from 2 to 3.8 by wt / wt. The method for manufacturing said fiber includes: crossblending the flame retardant with the inorganic solvent spinning dope of polyacrylonitrile, which is obtained by one-step method or two-step method to prepare crossblending spinning dope, then spinning, washing, drafting and thermal sizing by using current technique of making acrylon with inorganic solvent spinning line. The invention applies cheap, non-poisonous and high efficient inorganic additive flame retardant APP to spin flame retardant acrylon, as a result, crossblending spinning dope with good spinnability and fiber with high flame retardancy is obtained.

Description

field of invention

[0001] The invention relates to a flame-retardant fiber material—flame-retardant polyacrylonitrile fiber and a manufacturing method thereof, in particular to a flame-retardant polyacrylonitrile fiber containing ammonium polyphosphate flame retardant and spun by an inorganic solvent and a manufacturing method thereof. Background technique

[0002] Polyacrylonitrile fiber (commonly known as acrylic fiber) has the advantages of high bulkiness, comfortable hand feeling, good heat retention, and easy dyeing. It is widely used in clothing, daily decorations, and industrial applications. But its biggest disadvantage is that it is easy to burn, and it produces highly toxic hydrogen cyanide, etc., so its application is limited in many occasions requiring flame retardancy.

[0003] At present, there are three main methods for producing flame-retardant acrylic fibers in the world, namely finishing method, copolymerization method and blending method. The post-finishi...