Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By treating occluded solids
Patent
1981-11-02
1984-02-21
Anderson, Philip E.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By treating occluded solids
264 41, 521 61, 521 65, B29D 2704
Patent
active
044329202
ABSTRACT:
A process for the preparation of a porous membrane is provided which comprises the steps of preparing an aqueous dispersion system by dispersing a first material in water, said first material being selected from the group consisting of waxy substances, fatty substances and mixtures thereof and having a melting point of from the room temperature to 100.degree. C., admixing with said aqueous dispersion system an aqueous solution or aqueous dispersion of a second material selected from the group consisting of high polymers and compounds forming high polymers when irradiated by light rays, forming a membrane from the admixture, drying said membrane to evaporate water therefrom and removing said waxy substances and said fatty substances contained in the dried membrane by extracting the same by the use of a solvent.
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Ishikawa Norio
Murayama Morio
Nishijima Yasumoto
Anderson Philip E.
Daido-Maruta Finishing Co. Ltd.
Sutton Paul J.
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