Separator winding core, separator roll, and method of cleaning separator winding core
AssigneeSumitomo Chemical Company, Limited
InventorsJunji Suzuki, Takamasa Egawa
Life of this patent
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Abstract
The invention provides for a reduction in the period of time necessary for recycling a separator winding core around which a nonaqueous electrolyte secondary battery separator is wound. The separator winding core is described by the Munsell color system as (i) a lightness of not less than 3.0 but not more than 9.2 and (ii) a chroma of not less than 0.5.
Claims6
A separator winding core comprising a nonaqueous electrolyte secondary battery separator which is wound around the separator winding core,
- the separator winding core being described by the Munsell color system as (i) a lightness (value) of not less than 3.0 but not more than 9.2 and (ii) a chroma of not less than 0.5.
A method of cleaning a separator winding core, the winding core comprising a nonaqueous electrolyte secondary battery separator which is wound around the separator winding core;
- the separator winding core being described by the Munsell color system as (i) a lightness (value) of not less than 3.0 but not more than 9.2 and (ii) a chroma of not less than 0.5;
- wherein the method comprises the steps of:
- prior to winding the separator,
- removing a foreign material which has adhered to a surface of the separator winding core;
- and
- checking whether or not a quantity of the foreign material is not more than a criterion.
Dependencies are inferred from the claim text.