Preparation of gel-spun super-high molecular mass polytacryl and uses thereof

Abstract

The invention relates to a method of preparing and applying a jelly glue spinning ultra-high molecular weight polypropylene fiber, comprising: (1) ultra-high molecular mass isotactic polypropylene and solvent are mixed, and swelled at 90 DEG C to 190 DEG C and dissolved to make up a solution of polypropylene; (2) the solution of polypropylene is quenched in a precipitating bath via measuring and spinning components to form a polypropylene jelly glue silk; (3) jelly glue fiber is balance deoiled, leached, hot air dried in the condition of 20 deg C to 80 deg C, multistage stretched, heat shaped in the condition of 160 deg C to 200 deg C to form polypropylene fiber final goods. The method not only has the advantages of that technics is simple, nucleator needn't to be crystallized, the prepared fiber is provided with a high mechanical character, a high calorifics character, and a low creep rate, but also has the advantages of that high-strength and high-modulus, resistance to chemical attack, higher use temperature and so on. The produces of the invention can be widely used for rope, cable, velas, fishing net, geotextile, filtercloth, cloth for PE and hygiene, bulletproof, cloth for preventing pricking, gloves for preventing cutting, transmission belt, thermoplasticity or thermosetting resin, and pressure container reinforcement.

Description

technical field [0001] The invention belongs to the field of chemical fiber preparation and application, in particular to the preparation and application of gel-spun ultra-high molecular weight polypropylene (PP) fiber. Background technique [0002] The technology of gel spinning to prepare flexible chain high molecular weight polyethylene fibers was first invented by Paul Smith et al, and was disclosed in the German Patent Office in 1980, the patent number: de3004699, the technology at that time was to combine high molecular weight Polyethylene is dissolved in a volatile solvent at a lower concentration, and is solidified by quenching to form a jelly fiber, and then the jelly fiber is stretched at a high rate to form a high-strength high-modulus polyethylene fiber. However, due to the large volatile solvent used The toxicity of the fiber and the creep of the fiber are large, the use temperature is low and the dimensional stability is poor, which greatly restricts the applic...

AI Technical Summary

Problems solved by technology

Chinese patent application number 200710037871.0 applies for the method for preparing high-strength polypropylene fibers by gel spinning. Although this technology can effectively improve the crystallization performance and transparency of plastics and fiber products, the addition of crystallization nucleating agents will inevitably increase production costs. It will also cause inhomogeneity of the fiber structure due to the uniform distribution of the nucleating agent, and the addition of the nucleating agent will destroy the regularity of the macromolecular structure and damage the fiber performance.