Abstract: A PTFE/fiberglass composite for use as a conveyor belt comprises a fiberglass fabric having oppositely facing surfaces. The fabric has a structure defining a substantially uniform pattern of openings extending from one to the other of its major surfaces, with the average area of the individual openings being at least about 0.20258 mm2. PTFE films are laminated to the major surfaces of the fabric. The laminated films are interconnected by fluroropolymer ties extending through the fabric openings and are adhered to the major surfaces with a peel strength of between about 5-13 pli. The composite has a thickness of less than about 20 mils and a fiberglass content of less than about 25%.

Abstract: A PTFE/fiberglass composite for use as a conveyor belt comprises a fiberglass fabric having oppositely facing surfaces. The fabric has a structure defining a substantially uniform pattern of openings extending from one to the other of its major surfaces, with the average area of the individual openings being at least about 0.20258 mm2. PTFE films are laminated to the major surfaces of the fabric. The laminated films are interconnected by fluroropolymer ties extending through the fabric openings and are adhered to the major surfaces with a peel strength of between about 5-13 pli. The composite has a thickness of less than about 20 mils and a fiberglass content of less than about 25%.

Abstract: A method of manufacturing an endless conveyor belt comprises providing a flexible web in the form of a PTFE cross film laminate which in its as laminated state has a first length and a first lengthwise yield strength. The web is prestressed by lengthwise stretching to a second length greater than its as laminated first length to thereby achieve a second lengthwise yield strength greater than its as laminated first lengthwise yield strength. The ends of the prestressed web are then interconnected.

Abstract: A single membrane insulation material comprising a flexible fluoropolymer coated substrate, an insulating material laminated to one side of said substrate, and an anti-porosity fluid barrier associated with said substrate and shielded by said insulating material from elevated temperatures at said one side. Also disclosed is the inclusion of a a melt bondable fluoropolymer adhesive layer between the flexible fluoropolymer coated substrate and the insulating material.

Abstract: A single membrane insulation material comprising a flexible fluoropolymer coated substrate, an insulating material laminated to one side of said substrate, and an anti-porosity fluid barrier associated with said substrate and shielded by said insulating material from elevated temperatures at said one side. Also disclosed is the inclusion of a a melt bondable fluoropolymer adhesive layer between the flexible fluoropolymer coated substrate and the insulating material.