Patent ID: 9050782
Filing Date: 2015-06-09
Classification: B32B,Y10T

Abstract:
1. An expanded laminate comprising: a first plastic sheet having a top surface, a bottom surface and a thickness between 0.05 mm and 1 mm, wherein the first plastic sheet is a low-density polyethylene plastic sheet, a medium-density polyethylene plastic sheet, a high-density polyethylene plastic sheet, a polypropylene plastic sheet, a polycarbonate plastic sheet or an ionomeric ethylene copolymer plastic sheet; a first expanded sheet having a top surface, and a bottom surface, a foam density between 1.2 pcf and 8 pcf and a thickness between 1 mm and 8 mm, wherein the first expanded sheet is made of a material selected from the group consisting of expanded polyethylene and expanded polypropylene; the bottom surface of the first expanded sheet is directly bonded to the top surface of the first plastic sheet; a second expanded sheet having a top surface, and a bottom surface, a foam density between 1.2 pcf and 8 pcf and a thickness between 1 mm and 8 mm, wherein the second expanded sheet is made of a material selected from the group consisting of expanded polyethylene and expanded polypropylene; the top surface of the second expanded sheet is directly bonded to the bottom surface of the first plastic sheet; and a second plastic sheet having a top surface bonded to the bottom surface of the second expanded sheet; wherein the first plastic sheet is tough and able to cushion and distribute impacts exerted thereon through the first expanded sheet or the second expanded sheet; wherein surface area of the top surface of the first plastic sheet is larger than surface area of the bottom surface of the first expanded sheet; and surface area of the bottom surface of the first plastic sheet is larger than surface area of the top surface of the second expanded sheet; surface area of the top surface of the first plastic sheet is the same as surface area of the bottom surface of the first plastic sheet such that the first plastic sheet has a protruding portion over the edges of the first and second expanded sheets.