Abstract: Biaxially drawn, filled polyester film substrates, well adapted for the manufacture of magnetic recording tapes, are comprised of a biaxially stretched thermoplastic film matrix including a particulate filler material distributed therethrough, said filler material comprising (a) from about 0.01% to 1% by weight thereof of kaolinite particles having a mean particle size no greater than about 1 micron, and (b) from about 0.01% to 1% by weight thereof of titanium oxide particles also having a mean particle size no greater than about 1 micron.

Abstract: A waterproof membrane consisting of a non-woven bitumen-coated reinforcement of heat-bonded continuous filaments containing:from 70 to 90% of polyethylene glycol terephthalate andfrom 30 to 10% of polybutylene glycol terephthalate.The filaments are two-component and either concentric or side-by-side. The membrane consists of filaments made of each of the two types of polymers. The process for its manufacture by heat bonding.Application in the building industry (roofs, terraces, floors and any waterproofing application).

Abstract: A process for the manufacture of non-woven webs of continuous filaments by extrusion, stretching, deflection and deposition of a bundle of filaments on a receiving table and executing a reciprocating movement in a direction transverse to the direction of advance of the receiving table, is disclosed. Also disclosed is an apparatus for carrying out that process, for applying a reciprocating movement to the filament deflection device, comprising first, a tube in two parts, through which the filaments travel, having a fixed part and a movable part one end of which slides in the fixed part and the other carries the deflection device, and, second, means for subjecting the movable part of the tube, held parallel to the table which receives the filaments, to a reciprocating movement.