Polytetrafluoroethylene film longitudinal stretching unit

Abstract

The invention provides a polytetrafluoroethylene film longitudinal stretching unit which can be used for producing polytetrafluoroethylene films even in thickness and high in air permeability and is less in waste and low in energy consumption. The polytetrafluoroethylene film longitudinal stretching unit comprises an unrolling machine, a multi-roll desizer, a multipoint stretching furnace and a rolling machine, wherein the unreeling machine comprises an unreeling roller, an unrolling motor, an unrolling transducer used for controlling the unrolling roller and an unrolling tension motoring device; the output of the unrolling tension motoring device is connected with a PLC (Programmable Logic Controller); the output of the PLC is connected with the unrolling transducer; the rolling machine comprises a rolling roller, a rolling motor, a rolling transducer and a rolling tension motoring device; the output of the rolling tension motoring device is connected with the PLC; and the output of the PLC is connected with the rolling transducer.

Description

technical field [0001] The invention relates to a longitudinal stretching unit for bidirectional stretching of a polytetrafluoroethylene film, in particular to a longitudinal stretching device for a polytetrafluoroethylene breathable film. Background technique [0002] The PTFE film longitudinal stretching machine sold on the market is usually used to make raw material tapes, and adopts the following process: unwinding-deoiling-longitudinal stretching-winding. Such as figure 1 As shown, its main components: Unwinder 1 including unwinding roller and magnetic powder clutch, deoiling furnace 2 including deoiling roller, stretching furnace 3 including stretching roller, winding roller , winder 4, tension roller 5 including the torque motor that drives the winding roller to rotate. [0003] This type of equipment has the following defects: First, passive unwinding, the unwinding tension is manually controlled by a magnetic powder clutch, and the rewinding tension is controlled ...

AI Technical Summary

Problems solved by technology

[0003] This type of equipment has the following defects: First, passive unwinding, the unwinding tension is manually controlled by a magnetic powder clutch, and the rewinding tension is controlled by a torque motor. Inaccurate enough, easy to cause uneven film thickness, and due to the limited effective working range of the torque motor, it is not easy to roll well after the diameter of the package is increased, that is, the quality is poor, the production efficiency and the yield are low

Obviously, this kind of equipment cannot meet the production requirements of PTFE breathable membrane

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