Expander device, porous film producing apparatus, and porous film producing method
AssigneeSumitomo Chemical Company, Limited
InventorsKoichiro WATANABE, Yuji TAKAOKA
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Abstract
To prevent wear powder from adhering to a film, an expander roller (21) is used that extends in the width direction of a porous film (F) and that is configured to apply a tension to the porous film (F) in the width direction, and foreign matter adhering to the expander roller (21) is removed from a portion of the outer peripheral surface of the expander roller (21) at which portion the expander roller (21) is in no contact with the porous film (F).
Claims15
An expander device, comprising:
- an expander roller extending in a width direction of a film transferred, the expander roller being configured to apply a tension to the film in the width direction;
- and
- a foreign matter removing section configured to remove foreign matter adhering to the expander roller from a portion of an outer peripheral surface of the expander roller at which portion the expander roller is in no contact with the film.
A porous film producing method for producing a porous film for a battery by processing a film while transferring the film with use of an expander roller extending in a width direction of the film and configured to apply a tension to the film in the width direction,
- the porous film producing method comprising the step of removing foreign matter adhering to the expander roller from a portion of an outer peripheral surface of the expander roller at which portion the expander roller is in no contact with the film.
Dependencies are inferred from the claim text.