Low-denier two-component loop yarns of high strength, production thereof and use thereof as sewing and embroidery yarns

US5344710A · kind A · utility

Assignee

• Hoechst Aktiengeschaft · DE

Inventors

• Ingolf Jacob · Untermeitingen, DE
• Josef Geirhos · Bobingen, DE

Key dates

• Filing date: Aug 24, 1993
• Grant date: Sep 6, 1994
• Expiry date: Aug 24, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2976
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

There are described two-component loop yarns composed of core and effect filaments made of synthetic polymers, having a final tenacity of at least 30 cN/tex and a final linear density of less than 200 dtex and wherein the core and effect filaments each have a total linear density of in each case of less than 100 dtex. The yarns described are preferably useful as sewing yarns. They are obtainable by a process comprising the measures: PA0 a) feeding two or more feed yarn strands made of synthetic polymers at different speeds into a texturing jet, said feed yarn strands each having a total linear density of less than 100 dtex, PA0 b) intermingling the feed yarn strands in the texturing jet under conditions to form a yarn consisting of core and effect filaments and having loops formed chiefly of effect filaments on its surface, PA0 c) withdrawing this primary two-component loop yarn under tension so that, through reduction in the loop size, said primary yarn becomes mechanically stabilized, PA0 d) heating the stabilized primary yarn to set the yarn structure, and PA0 e) choosing the total linear densities of the feed yarn strands, the difference in the transport speeds of the feed yarn…