POLYVINYL ALCOHOL CORD TIRES

• Main Authors: KOUSAKA S,JA, KIMURA T,JA, TANAKA S,JA
• Format: Patent
• Language: English
• Published: 30.07.1974
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TEXTILES

Polyvinyl alcohol fibers are provided containing boric acid or a borate salt thereof in an amount of 0.2 to 0.9 percent by weight of polyvinyl alcohol wherein the yarn tenacity of 120 DEG C., the yarn initial modulus at 120 DEG C. and the yarn creep at 135 DEG C. are at least 7.5 g/d, 100 g/d and less than 2 percent, respectively. Radialply and belted bias ply tires are also provided which utilize said fibers in the cord of the breaker or belt, the fiber being twisted under a twist constant of ply of 800 to 1,300 and a cable twist (turns/10cm) of 80 to 100 percent of the ply twist (turns/10cm).