Calendered double side segment coated webs
AssigneeE-One Moli Energy (Canada) Limited
InventorsJan Naess Reimers, Akiyoshi Manabe, Alexander Man-Chung Leung
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Abstract
An improved design and manufacturing method is disclosed for calendered, double side segment coated webs. By staggering the leading edges and/or the trailing edges of the segment coatings on one side of the web from those on the other side, web damage, including the incidence of breakage, can be reduced. Further, vibration and wear on the calendering apparatus can be reduced. The invention is particularly useful for heavily calendered webs such as the electrodes in non-aqueous rechargeable lithium ion batteries.
Claims15
A method of making a calendered, segment coated, continuous web including the steps of:
- repeatedly applying segment coatings on both sides of the web such that each segment coating has a leading edge and a trailing edge transverse to the web direction and such that the segment coatings on a first side of the web are longitudinally aligned with the segment coatings on the second side of the web whereby the leading edges and trailing edges of the first side segment coatings are proximate to the leading edges and the trailing edges of the second side segment coatings respectively, and
- calendering the segment coated web between calender rolls, the web being oriented during the calendering such that the coated segments enter the calender rolls at their leading edges,
- wherein the improvement comprises staggering at least one of the leading edges and the trailing edges of the first side segment coatings from the corresponding leading edges and trailing edges of the second side segment coatings in an amount sufficient to stepwise engage or disengage the calender rolls from the segment coatings on each side of the web during calendering, wherein the amount staggered must exceed alignment variations for an intentionally aligned web.
Dependencies are inferred from the claim text.