Polyvinyl alcohol reinforcement modification halogen-free flame retardant polyacrylic composite fiber and preparation method thereof

• Main Authors: XU JIANJUN, LIU PENGQING, YE GUANGDOU, ZHOU WANLI, JIANG MENGJIN
• Format: Patent
• Language: English
• Published: 21.10.2015
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; LAUNDERING; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS

The invention discloses a polyvinyl alcohol reinforcement modification halogen-free flame retardant polyacrylic composite fiber. The polyvinyl alcohol reinforcement modification halogen-free flame retardant polyacrylic composite fiber is obtained through the steps that firstly, deaeration, spinning, consolidation forming and thermal stretching are performed on a spinning solution prepared by polyving akohol and polyacrylonitrile according to the mass ratio of 10-50:50-90; secondly, thermoforming is performed at 180 DEG C-230 DEG C to obtain a polyvinyl alcohol reinforcement modification polyacrylic composite fiber; thirdly, flame retarding treatment is performed; the limit oxygen index is 29.0-43.5 percent, and the strength is 2.72-4.86 cN/dtex. According to the polyvinyl alcohol reinforcement modification halogen-free flame retardant polyacrylic composite fiber, not only is the excellent flame retardant property achieved, but also the mechanical strength is improved by more than one time than the strength of an existing flame retardant polyacrylic composite fiber; the fiber can be directly used as textile raw materials, therefore, the additional value of the fiber is greatly increased, and the defects that an existing halogen-free flame retardant polyacrylic composite fiber is low in strength, and textile processing is difficult to perform are overcome.