Method for preparing flame-proof viscose fiber

Abstract

The invention discloses a process for preparing flame retarding cellulose viscose, which adopts pyrophosphate exchange reaction flame retardant particle whose mean particle diameter is <= 1.0um, non-ionic surface active agent, dispersing agent and solvent water to mix and obtain flame retardant emulsion, each percentage by weight is pyrophosphate exchange reaction flame retardant 20-45 wt%, non-ionic surface active agent 5-10 wt% and dispersing agent 0.5-1.0 wt%, and residue is solvent water. The process for preparation comprises adding pyrophosphate exchange reaction flame retardant of flame retardant emulsion which is corresponded to alpha cellulose 15-30 % into spinning original liquid which is filtered to mix, shaping spinning by adopting spinning bath which is low acid, low salt, low temperature and high zinc. The spinning original liquid of the invention has simple and convenient preparation, fiber does not contain halogen elements, which avoids environmental pollution, when in burning, the invention is not melted, while charring only happens to keep the original shape of fiber, the invention prevents dripping which is melted in high temperature from scalding human body, and flame retardant is distributed evenly in adhesive, which can not smolder after leaving fire and easy to be self-extinguished.

Description

technical field [0001] The invention relates to a man-made fiber, in particular to a method for preparing a flame-retardant viscose fiber. Background technique [0002] With the development of science and technology and the progress of the textile industry, the variety of textiles continues to increase, and its application scope and quantity have increased significantly, from people's daily life to industry, transportation, to military and many other fields. However, following this, the problem of textiles igniting and causing disasters has become more and more important. The results of the investigation of fatal accidents caused by fire show that fires caused by upholstery and textiles account for an important proportion. Therefore, in order to prevent fires, the production of flame-retardant fibers has received more and more attention. In order to reduce the hazard of fabric fire, various methods have been adopted. If non-flame-retardant fabrics are restricted by fabric...

AI Technical Summary

Problems solved by technology

If non-flame-retardant fabrics are restricted by fabric type and place of use, the flame-retardant production of viscose fiber is mainly made by combining antimony trioxide with halogen after the fiber is made or during the production process (when the fiber is in a gel state). The flame retardant is coated on the surface of the fiber in latex state, and the flame retardant is also used to prepare the viscose spinning solution containing the flame retardant particles, so as to prepare the viscose fiber with flame retardancy. Typical flame retardants are Adhesives composed of polyvinyl chloride latex, polyvinyl bromide latex, chlorinated paraffin or brominated aromatics and antimony oxide, etc., but these flame retardants mostly use halogen-containing flame retardants, which are non-degradable. It has a certain degree of pollution, and this kind of flame retardant is not resistant to high temperature, washing and sunlight, and the flame-retardant fiber is prone to melt dripping, and the high-temperature melt produced by melting dripping will not only burn the skin, but also cause Combustible flammable substances around, causing a bigger fire, easy to smolder after leaving the fire source, not self-extinguishing, which brings certain difficulties to fire prevention. Uniformity, the uniformity of its flame retardant effect is poor, and the addition of flame retardant particles affects the viscose filtration performance and the strength index decreases, which increases the difficulty of spinning