Regenerated cellulose film, functional film and preparation method therefor

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United States of America Patent

PATENT NO 9834652
APP PUB NO 20160251489A1
SERIAL NO

15033382

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Abstract

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This invention relates to a regenerated cellulose film, a functional film and preparation method thereof. The method mainly comprises the following steps: (1) shaping a cellulose/ionic liquid solution by die extrusion, calendering and casting; (2) the shaped solution entering into a coagulation bath to form a cellulose gel film; (3) in coagulation and washing processes, stretching the cellulose gel film at least 1 time in the transverse direction and at least 1 time in the longitudinal direction; (4) in drying process, further applying tension to the stretched film in the transverse and longitudinal directions, and finally obtaining a regenerated cellulose film by rolling. An organic and/or an inorganic functional additive can be added into the cellulose/ionic liquid solution to obtain a regenerated cellulose functional film. The regenerated cellulose film and the functional film thereof obtained by the above method have well-balanced and relative high longitudinal and transverse tensile strengths, as well as good flatness.

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Patent Owner(s)

Patent OwnerAddress
INSTITUTE OF CHEMISTRY CHINESE ACADEMIC OF SCIENCESNORTH FIRST STREET 2 ZHONGGUANCUN HAIDIAN DISTRICT BEIJING 100190
SHANDONG HENGLIAN NEW MATERIALS CO LTDNO 8019 XINSHA ROAD GUDI STREET HANTING DISTRICT WEIFANG CITY SHANDONG PROVINCE CHINA 261106 WEIFANG CITY SHANDONG PROVINCE 261106

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gao, Yugang Shandong, CN 2 2
Li, Ruifeng Shandong, CN 28 41
Qiu, Jinjiang Shandong, CN 2 2
Wu, Jin Beijing, CN 532 2703
Yu, Jian Beijing, CN 425 1964
Zhang, Jinming Beijing, CN 36 104
Zhang, Jun Beijing, CN 1152 7034
Zhang, Xiaoyu Shandong, CN 147 948

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