Braided rope drawing method, porous membrane manufacturing method, and braided rope supplying device

Abstract

A method for pulling out a braided rope, in which a braided rope (110) stored in a storage container (120) or wound on a winding frame (170) is pulled out while the storage container (120) or the winding frame (170) is stationary ) out. When sending out the braided rope (110) whose product of twist recovery rate and twisting torque is 14 g·cm or less by this method, the braided rope (110) does not produce kinks when sending out. In the manufacturing method of the porous membrane (26, 150), the membrane-forming stock solution (25) is applied on the outer peripheral surface of the braided cord (110) and solidified to form a porous film on the outer peripheral surface of the braided cord (110). Membrane (151). The supply device (210) has a container (12) and a guide member (214), and pulls the braided rope (110) accommodated in the container (120) toward the guide member (124, 214). According to the present invention, a turntable for rotating the container (120) is not needed, and the braided rope (110) can be fed out with a simple mechanism.

Description

technical field [0001] The present invention relates to a method for producing a porous membrane (porous hollow fiber membrane) having a hollow strength support therein, in which a braided rope support in the porous membrane (porous hollow fiber membrane) is supplied to a spinning nozzle rope supply device. This application claims priority based on Japanese Patent Application No. 2011-024027 filed in Japan on February 7, 2011 and Japanese Patent Application No. 2011-089093 filed in Japan on April 13, 2011, the contents of which are incorporated herein by reference . Background technique [0002] In recent years, a method using an elongated tubular porous membrane has attracted attention as a method of water treatment due to rising concerns about environmental pollution and strengthening of regulations. [0003] In addition, in the fields of food industry, medical treatment and electronic industry, etc., for the purpose of concentration and recovery of useful components, re...

AI Technical Summary

Problems solved by technology

[0028] In this way, in the case of continuous supply of the hollow rope, there is a problem in operation

[0029] On the other hand, when the hollow rope is wound on the bobbin, if the rotation of the bobbin is stopped, the hollow rope cannot be supplied during this period, and once the production of the porous membrane is stopped, the production efficiency will be poor.

[0030] In addition, when the support body stored by the method of Patent Document 5 is pulled out from the storage container and supplied to the spinning nozzle, entanglement may occur due to being caught on the housing portion of the storage container or the mandrel.

[0031] If the support is entangled, the supply tension of the support will rise sharply, the support will slide in the support feeding mechanism, and the support will not be fed downstream, or the storage container will be lifted, or it will be damaged due to collision with the guide of the support. Or the entangled part falls off and is sent downstream. In these cases, problems such as being caught on the support guide or the spinning nozzle and stopping the running may occur.

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