Manufacturing technology of PBT used for loose tube of optical cable

Abstract

A manufacturing technology of PBT used for a loose tube of an optical cable. The invention relates to the technical field of high molecular materials and provides a manufacturing technology of PBT used for a loose tube of an optical cable. The PBT is stable in shape, good in flexibility and high in processing efficiency. The manufacturing technology includes following steps: 1) preliminary treatment; 2) a primary stirring process; 3) a secondary stirring process; and 4) dust removal. According to the invention, a viscosity-increasing process is carried out to a PBT raw material and 5# white oil is added during the primary stirring process. By means of the white oil, flexibility of the material can be enhanced effectively, thereby increasing smoothness of a surface of the loose tube and being beneficial to cabling. A polypropylene nucleating agent is added during the secondary stirring process. By means of the polypropylene nucleating agent, a crystallization speed of the material can be effectively increased, thereby significantly reducing a production time of the material and improving a processing efficiency. The PBT material, after being processed, can satisfy a production requirement and a technical standard of the loose tube.

Description

technical field

[0001] The invention relates to the technical field of polymer materials, in particular to a production process of PBT for optical cable loose tubes

[0002] improvement of. Background technique

[0003] With the rapid development of the communication industry, the demand for ribbon optical cables has soared. Ribbon optical cable is a loose tube with several optical fibers in parallel. It requires a loose tube with a large diameter, a stable aperture, and appropriate rigidity and flexibility. Simply use ordinary PBT (polybutylence terephthalate, polyethylene terephthalate) Butanediol ester) can not meet the production requirements of large loose tubes, and this has become a technical problem to be solved urgently by those skilled in the art. Contents of the invention

[0004] Aiming at the above problems, the present invention provides a PBT production process for optical cable loose tube with stable shape, good flexibility and high processing efficie...