MANUFACTURING METHOD OF POROUS LAMINATED BODY, AND POROUS LAMINATED BODY

摘要

PROBLEM TO BE SOLVED: To provide a porous laminated body capable of having a communication property in a width direction.

SOLUTION: This manufacturing method of the porous laminated body having the communication property in the width direction and a large number of micropores is constituted of a step for making a laminated body comprising at least three layers of a middle layer comprising a thermoplastic resin having a hard segment and a soft segment and both-side outer layers without pores comprising resins including fillers located on both side outer faces sandwiching the middle layer, a step for impregnating the obtained laminated body with fluid in a supercritical state or a semicritical state and then releasing the fluid from the states to vaporize the fluid to make the middle layer porous, and a step for making two nonporous layers located in both the side layers porous by extending processing.

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