基本信息:
- 专利标题: ELASTIC COMPOSITE FORMED FROM MULTIPLE LAMINATE STRUCTURES
- 专利标题(中):由多层结构形成的弹性复合材料
- 申请号:PCT/IB2009/052023 申请日:2009-05-14
- 公开(公告)号:WO2010001272A2 公开(公告)日:2010-01-07
- 发明人: AUSTIN, James , THOMAS, Oomman, P. , MEYER, Stephen, C. , WELCH, Howard, M. , SIQUEIRA, Jose, A.
- 申请人: KIMBERLY-CLARK WORLDWIDE, INC. , AUSTIN, James , THOMAS, Oomman, P. , MEYER, Stephen, C. , WELCH, Howard, M. , SIQUEIRA, Jose, A.
- 申请人地址: 401 North Lake Street Neenah, Wisconsin 54956 US
- 专利权人: KIMBERLY-CLARK WORLDWIDE, INC.,AUSTIN, James,THOMAS, Oomman, P.,MEYER, Stephen, C.,WELCH, Howard, M.,SIQUEIRA, Jose, A.
- 当前专利权人: KIMBERLY-CLARK WORLDWIDE, INC.,AUSTIN, James,THOMAS, Oomman, P.,MEYER, Stephen, C.,WELCH, Howard, M.,SIQUEIRA, Jose, A.
- 当前专利权人地址: 401 North Lake Street Neenah, Wisconsin 54956 US
- 代理机构: JOHNSTON, Jason, W. et al.
- 优先权: US12/164,990 20080630
- 主分类号: A61F13/49
- IPC分类号: A61F13/49 ; A61L15/22
摘要:
An elastic composite formed from a laminate that contains an elastic film and a lightweight nonwoven facing having a low strength in the cross-machine direction ("CD") is provided. Due to the low strength of the facing, it is desirable that the elastic film have a sufficient thickness and weight to enhance the strength of the resulting composite. Unfortunately, the ability to join an elastic film to such a lightweight nonwoven facing becomes increasingly difficult as the thickness of the film increases. In this regard, the present inventors have discovered that a second laminate may be employed in the elastic composite that is formed from a thermoplastic film and nonwoven facing to impart increased strength to the composite. The film and facing of the second laminate may be formed from the same or different materials than the film and facing of the first laminate. Regardless, the laminates are positioned so that the elastic and thermoplastic films are in a face-to-face relationship. Through selective control over the polymer content and thickness, the present inventors have discovered that the elastic and thermoplastic films may be readily joined together under light pressure, even at ambient temperature conditions. This avoids the application of a substantial amount of heat used in conventional calender bonding processes, which can otherwise damage the film, and also minimize the need for costly adhesives.
摘要(中):
提供由层叠体形成的弹性复合体,所述层叠体包含弹性膜和在横向(“CD”)下具有低强度的轻质无纺布面。 由于表面强度低,所以弹性薄膜最好具有足够的厚度和重量,以提高所得复合材料的强度。 不幸的是,随着膜的厚度增加,将弹性膜连接到这种轻质非织造物面上的能力变得越来越困难。 在这方面,本发明人已经发现,在由热塑性膜和非织造材料形成的弹性复合材料中可以使用第二层压材料,以赋予复合材料更高的强度。 第二层压体的膜和面可以由与第一层压体的膜和面相同或不同的材料形成。 无论如何,层压板被定位成使得弹性和热塑性薄膜处于面对面的关系。 通过选择性地控制聚合物含量和厚度,本发明人已经发现,即使在环境温度条件下,弹性和热塑性薄膜也可以在轻压下容易地连接在一起。 这避免了在传统的压延机粘合工艺中使用大量的热量,否则可能会损坏薄膜,并且还减少了对昂贵粘合剂的需求。