Complete device for manufacturing polytetrafluoroethylene (PTFE) short fiber in acupuncture comb-cutting method and method thereof

Abstract

The invention relates to a device for manufacturing a short fiber, in particular to a complete device for manufacturing a polytetrafluoroethylene (PTFE) short fiber in an acupuncture comb-cutting method and a method thereof. The complete device comprises an oriented film unwinding mechanism, a pair puncture needle roller for puncturing an oriented film, a comb-cutting roller combing and cutting the punctured oriented film into filaments, a buncher bunching the filaments, a traversing gear and a winding mechanism which are all arranged in sequence, wherein the winding mechanism is used for winding a filament bundle. Compared with a film breaking processing process widely adopted at present, the complete device for manufacturing the PTFE short fiber in the acupuncture comb-cutting method and the method thereof have the advantages that the process is simple, reasonable and reliable, operation is convenient, energy consumption is little, efficiency is high, and the device and main parts are low in manufacturing cost, little in investment and low in maintenance cost. The PTFE short fiber with thinner fineness can be produced, the average fineness can reach 2.5dtex at minimum, and production varieties are expanded.

Description

technical field [0001] The present invention relates to a kind of equipment for making short fiber, especially a kind of complete set of equipment and method for making PTFE short fiber by needle punching and carding method. Background technique [0002] Polytetrafluoroethylene (PTFE) has the incomparable advantages of other plastics such as high temperature resistance, acid and alkali corrosion resistance, and hydrolysis resistance. It can be made into high temperature resistant filter material by making it into short fibers, and it is a corrosion resistant filter material in the chemical and pharmaceutical industries. , PTFE non-woven fabrics, etc., are increasingly being widely used. [0003] There are two types of methods for manufacturing PTFE short fibers at present. The first type is the melt spinning method. Because the fluidity of PTFE in the molten state is extremely poor, it is not possible to use the usual melting and spinning method to make short fibers. Instea...

AI Technical Summary

Problems solved by technology

Since the fineness of the fiber is determined by the distance between the blades on the rolling knife, only a knife pattern with a small distance can produce finer fibers. However, the smaller the knife pattern, the more difficult it is to manufacture and process, and the precision requirements The higher the manufacturing cost is quite high

So the production of finer fibers is limited

During the manufacturing process, the knives of the embossing hob are required to be kept sharp, and a slight passivation will affect the production. Therefore, the rolling knives need to be replaced frequently during the production process, and the maintenance cost is very high.

In the second method, the film is cut into strips and then clustered and twisted, and then stretched by extrusion, stretched by heating, stretched by extrusion, and stretched by heat again, so that the process is repeated many times, and the divided rough Silk is drawn into fine fibers. The fiber fineness of this method is mainly obtained through multiple stretches. The process is complicated, the energy consumption is huge, the efficiency is low, and the cost is high.

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