High-moisture-permeability, microporous plastic film, and its production method and apparatus

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United States of America Patent

PATENT NO 10875259
APP PUB NO 20170136712A1
SERIAL NO

15185966

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Abstract

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A high-moisture-permeability, microporous plastic film randomly having a lot of recesses having different opening diameters and depths, with clefts formed in the recesses, is produced by pressing a first pattern roll randomly having a lot of high-hardness, fine particles having sharp edges on a roll body surface to a flat-surface metal roll, to produce an anvil roll randomly having a lot of recesses on a metal roll surface; arranging a second pattern roll randomly having a lot of high-hardness, fine particles having sharp edges on a roll body surface oppositely to the anvil roll; and passing a plastic film through a gap between the second pattern roll and the anvil roll.

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Patent Owner(s)

Patent OwnerAddress
KAGAWA SEIJIKOSHIGAYA-SHI

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kagawa, Seiji Koshigaya, JP 120 738

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