- 专利标题: Reticulated thermoplastic film and method of making the same
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申请号: US13901015申请日: 2013-05-23
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公开(公告)号: US09944764B2公开(公告)日: 2018-04-17
- 发明人: Neelakandan Chandrasekaran , Thomas P. Hanschen , Timothy P. Pariseau , William C. Unruh
- 申请人: 3M INNOVATIVE PROPERTIES COMPANY
- 申请人地址: US MN St. Paul
- 专利权人: 3M Innovative Properties Company
- 当前专利权人: 3M Innovative Properties Company
- 当前专利权人地址: US MN St. Paul
- 主分类号: B32B3/10
- IPC分类号: B32B3/10 ; B32B7/12 ; B29D28/00 ; C08J5/18 ; B29C55/14 ; B32B3/26 ; A61F13/62
摘要:
A reticulated thermoplastic film includes a backing with openings and discrete elements protruding from the first major surface. There are two discrete elements aligned in a first direction abutting opposite ends of any given opening. In a second direction perpendicular to the first direction, there is one discrete element between the given opening and an adjacent opening aligned in the second direction. Each portion of the backing around the given opening is plastically deformed in its lengthwise direction and typically has higher stretch-induced molecular orientation at its edge adjacent the given opening than at its midpoint. The openings are often retractable. A method of making a reticulated thermoplastic film is also disclosed. The method includes stretching a thermoplastic backing with a plurality of discrete elements in the first direction. Subsequently stretching the backing in the second direction forms a tear in the backing between two adjacent discrete elements.
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