Technology for manufacturing PTFE sewing threads with film splitting method

Abstract

The invention discloses a technology for manufacturing PTFE sewing threads with a film splitting method. The technology comprises the following steps that firstly, a wide PTFE film blank is drafted, wherein the wide PTFE film blank is drafted into a narrow film with a film drafting device; secondly, film splitting drafting of the narrow PTFE film is carried out, wherein the narrow PTFE film manufactured in the first step is cut into 30-40 pieces of narrow yarns with a film splitting device on a film splitting and drafting device, and then the narrow yarns are drafted to be thin with a drafting machine and manufactured into PTFE sewing threads; thirdly, winding is carried out, wherein the PTFE sewing threads manufactured in the second step are wound with a multi-head winding machine. The technology is simple in process, equipment used in the manufacturing procedures is simple in structure and easy to use and operate, the product quality can be easily controlled, labor intensity is relieved, manpower input is reduced, the production efficiency is improved, the manufactured PTFE sewing threads are not likely to crack and long, and the uniformity, strength and the qualified rate of the PTFE sewing threads are ensured.

Description

technical field [0001] The invention relates to a process for manufacturing PTFE sewing thread by a membrane splitting method. Background technique [0002] Polytetrafluoroethylene (Teflon or PTFE), commonly known as the "King of Plastics", is a polymer compound formed by polymerization of tetrafluoroethylene, which has excellent chemical stability, corrosion resistance, sealing, high lubrication and non-stick properties, electrical Insulation and good aging resistance. Used as engineering plastics, it can be made into PTFE tubes, rods, strips, plates, films, etc. PTFE is a thermoplastic, but it is difficult to process with ordinary thermoplastic molding methods. Its "difficulty in processing" comes from its special formability, such as PTFE's large melting dryness, shear sensitivity, and large shrinkage. Creep resistance and low coefficient of friction. [0003] The manufacturing process of the existing PTFE sewing thread is relatively complicated, using mechanical calen...

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Problems solved by technology

[0003] The manufacturing process of the existing PTFE sewing thread is relatively complicated, using mechanical calendering and manual stretching, which has problems such as high labor intensity, low production efficiency, and poor uniformity of product thickness, which affects the use effect, semi-mechanical production mode, and production efficiency. Low

The film stretching equipment used in the process has a complex structure and is not convenient to use. The labor intensity of the workers is high, the production efficiency is low, and the film drawn out is uneven; the structure of the film stretching equipment used in the process is relatively complicated. , the process is cumbersome, the use is not convenient enough, the labor intensity of the workers is high, the production efficiency is low, the wire cutting process is easy to break and the cut wire is uneven, and the process is discontinuous, which seriously affects the uniformity, strength and pass rate of PTFE sewing thread. influences

The existing PTFE sewing thread manufacturing process can no longer meet the needs of production

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