Production method of PAN (Polyacrylonitrile) protofilament

• Main Authors: WANG HAOJING, LIU FUJIE, FAN LIDONG, ZHANG SHUBIN, CHENG LU, PANG PEIDONG, XUE LINBING
• Format: Patent
• Language: Chinese; English
• Published: 13.03.2013
• 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 production method of PAN (Polyacrylonitrile) protofilament for producing carbon fibers. The production method comprises the following steps in sequence: oiling the fibers which are obtained by stretching spinning filaments through hot water at the first time by virtue of an oiling agent A, wherein the oiling agent A includes a boron compound and polyester with more than two ester groups; the boron compound occupies 0.1 to 5% based on the mass of all effective compounds of the oiling agent A, except water; drying the fibers after the first oiling; stretching at the same time by steam; and oiling by an oiling agent B at the second time, wherein the oiling agent B contains aromatic polyatomic alcohol and modified polysiloxane; and the modified polysiloxane occupies 5 to 15% based on the mass of the effective components of the oiling agent B. According to the production method of the PAN protofilament, different oiling agents are adopted and used for processing the fibers twice; the boro