Viscosuisse Sa

Rhone-poulenc Viscosuisse Sa

Rhodia Filtec Ag

Bruno Lang

Paul Schaffner

Eberhard Bergen

Remi Lalonde

Filling yarn and method for producing it from thermally protected

Uncoated airbag fabric

The dimension-stable impregnated polyester tire cord is at least 95% by weight polyethylene terephthalate and has an intrinsic viscosity of 0.70 dl/g to 0.89 dl/g for undrawn cord, a fineness of at least 1100 x 2 dtex, a dimension stability coefficient of at least 30'000 cN.sup.2 /tex.sup.2, a thermal shrinkage of about 0.8 percent measured at a temperature of 160.degree. C. with 0.1 cN/tex pre-stress and a permanent lengthening of less than 1.5 percent at a tire pressure of 2 bar and a temperature of 100.degree. C., so as to reduce shrinkage during vulcanization and in tires heated in operation and so as to provide a quieter running tire. The fatigue resistance of this polyester tire cord suffers a drop in tensile strength of less than 20 percent measured at 10.8 MC with 6 percent strain and 6 percent compression so that tires made from the polyester cord have a greater durability and increased life.

Impregnated, dimension-stable polyester cord

A process for the production of dimension-stable polyester cord by means of a two-stage heat treatment including initially stretching at 205.degree.-250.degree. C. between 3 and 7 percent, and subsequently relaxing at 205.degree.-250.degree. C. between 3 and 7 percent. There results a dimension-stable polyester cord displaying a shrinkage of less than 1.2 percent.

Process for the production of dimension-stable polyester tire cord

A method for prevention wall indentations in a splice region of the tire carcass by joining two cut edges of the tire carcass and applying to the splice region a splice tape which overlaps the cut edges of the carcass.

Method for preventing side wall indentations in a splice region of the

A process is disclosed for production of a heat-treated, coarse fiber of polyester-POY, whereby the fiber is first twisted and then continuously relaxed and tempered at a temperature from 130.degree. to 250.degree. C. to an extent from 20 to 55%. The slide-resistant fiber produced in this manner, displaying an elongation at break from 150 to 350%, a thermal shrink from +6 to -6% can be employed without further pre-treatment as weft yarn for tire cord webs.

Growing community of inventors

Ballwil, Switzerland

Bruno Lang