公开(公告)号：US20140349062A1

公开(公告)日：2014-11-27

申请号：US13901015

申请日：2013-05-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Neelakandan Chandrasekaran ,  Thomas P. Hanschen ,  Timothy P. Pariseau ,  William C. Unruh

IPC: C08J5/18 ,  B32B3/26 ,  B29C55/14

CPC classification number: C08J5/18 ,  A61F13/625 ,  B29C55/14 ,  B29C55/143 ,  B29D28/00 ,  B32B3/266 ,  C08J2323/14 ,  Y10T428/24008 ,  Y10T428/24273 ,  Y10T428/24331

Abstract: 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.

Abstract translation: 网状热塑性膜包括具有开口的背衬和从第一主表面突出的分立元件。 有两个离散的元件在第一方向上对齐，与第一个方向相抵接。 在垂直于第一方向的第二方向上，在给定开口和在第二方向上对齐的相邻开口之间存在一个分立元件。 围绕给定开口的背衬的每个部分在其长度方向上塑性变形，并且在与其中点相邻的给定开口的边缘处通常具有较高的拉伸诱导分子取向。 开口通常可伸缩。 还公开了一种制备网状热塑性薄膜的方法。 该方法包括在第一方向上用多个离散元件拉伸热塑性背衬。 随后在第二方向上拉伸背衬在两个相邻离散元件之间的背衬中形成撕裂。