In addition, the secondary backing material, if applied, may include any synthetic resin that will integrally fuse with the extruded sheet. Preferably, the secondary backing comprises the same thermoplastic polyolefin polymer, copolymer or terpolymer as the primary backing. Optionally, the secondary back...
Char-forming organic fibres are either natural, such as cellulose and wool, or synthetic thermoplastics with aromatic structure such as some polyesters and polyamides. Other organic thermoplastic fibres, such as polyolefins, on the other hand, have poor or zero char-forming capability. When ...