Patent ID: 8263210
Filing Date: 2012-09-11
Classification: B29C,B29K,B32B,Y10T

Abstract:
1. A crosslaminate comprising at least two oriented plies A and B, each comprising a thermoplastic polymer material, each biaxially oriented with one direction dominating and in which the ply A is heat sealed to the ply B through one or more lamination layers to form either (1) a weak bonding between the plies all over, or (2) a pattern of bonding including alternating bonding regions and non bonding regions or alternating strong bonding regions and weak bonding regions, and whereby the ply A and the ply B each comprises an array of linear bosses distributed over a film surface with a division no larger than about 2 mm, integrally connected by thinner linear webs ( 4 ) which each by volume is less than 50% of the average of the two adjacent bosses, and delineations between the bosses and adjacent thinner webs that comprise locations where a ply thickness is an average between a thickest part of the boss and a thinnest part of the web, and whereby a main cross-sectional portion of each boss is uniaxially oriented sufficiently to achieve a dominating direction of orientation of the ply A, while the thinner webs are biaxially oriented, wherein even distribution over an area of the laminate at least 50% of the areas of the thinner linear webs in the ply A and in the ply B are non bonded or are weakly bonded such that a majority of each boss to boss bond, is at least as strong as a strongest bond of an immediate adjacent thin web to thin web bonds as determined by peeling at room temperature.