发明名称 |
PROCESS FOR PRODUCING CELLULOSE-NANOFIBER-FILLED MICROPOROUS STRETCHED POLYOLEFIN FILM, MICROPOROUS CELLULOSE-NANOFIBER COMPOSITE FILM, AND SEPARATOR FOR NON-AQUEOUS SECONDARY BATTERY |
摘要 |
A method for producing a cellulose nanofiber-containing polyolefin microporous stretched film according to the invention includes: a first step of obtaining a cellulose powder dispersion mixture by uniformly dispersing a cellulose which has a powder particle shape and whose hydroxyl groups have been subjected to a lipophilizing treatment using a dibasic acid anhydride, in a plasticizer; a second step of melt-kneading the cellulose powder dispersion mixture and a polyolefin to obtain a polyolefin resin composition; a third step of extrusion-molding the polyolefin resin composition to obtain an extrudate; a fourth step of stretching the extrudate with a film stretcher to obtain a film; a fifth step of extracting out the plasticizer from the film; and a sixth step of thermally fixing the film from which the plasticizer has been extracted out for inhibiting contraction, while stretching the film at a temperature not higher than a melting point of the polyolefin, in which a twin-screw kneading extruder is used only once throughout the second and third steps. |
申请公布号 |
US2016133902(A1) |
申请公布日期 |
2016.05.12 |
申请号 |
US201414895856 |
申请日期 |
2014.06.04 |
申请人 |
THE JAPAN STEEL WORKS, LTD. |
发明人 |
NAKAMURA Satoru;KUSHIZAKI Yoshiyuki;ISHIGURO Ryou;YOSHIOKA Mariko |
分类号 |
H01M2/14;H01M10/0525;B29D99/00;H01M2/16 |
主分类号 |
H01M2/14 |
代理机构 |
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代理人 |
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主权项 |
1. A method for producing a cellulose nanofiber-containing polyolefin microporous stretched film, the method comprising: a first step of obtaining a cellulose powder dispersion mixture by uniformly dispersing a cellulose which has a powder particle shape and whose hydroxyl groups have been subjected to a lipophilizing treatment using a dibasic acid anhydride, in a plasticizer; a second step of melt-kneading the cellulose powder dispersion mixture and a polyolefin to obtain a polyolefin resin composition; a third step of extrusion-molding the polyolefin resin composition to obtain an extrudate; a fourth step of stretching the extrudate with a film stretcher to obtain a film; a fifth step of extracting out the plasticizer from the film; and a sixth step of thermally fixing the film from which the plasticizer has been extracted out for inhibiting contraction, while stretching the film at a temperature not higher than a melting point of the polyolefin,
wherein a twin-screw kneading extruder is used only once throughout the second and third steps. |
地址 |
Tokyo JP |