Method of producing film, method of producing separator, and method of producing plasticizer
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United States of America Patent
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May 18, 2021
Grant Date -
Sep 6, 2018
app pub date -
Mar 2, 2018
filing date -
Mar 3, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A method of producing a film in accordance with an aspect of the present invention includes: a first kneading and forming step of forming a composition obtained by kneading a polyolefin resin and a plasticizer; a stretching step of stretching the composition; a composition cleaning step of immersing the composition in a cleaning solvent and removing the plasticizer; a separation step of separating, from the cleaning solvent which has been used in the cleaning step, the plasticizer which has been eluted in the cleaning solvent; and a second kneading and forming step of forming a composition obtained by kneading a polyolefin resin and the plasticizer which has been separated in the separation step.
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International Classification(s)
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- H01M:PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT....
- B29D:PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FRO....
- B29B:PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE ....
- B29K:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, ....
- B29L:INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RE....
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