Process for spinning of core/mantle yarns and yarn products

US4321789A · kind A · utility

Assignee

• Barmag Barmer Maschinenfabrik Aktiengesellschaft · DE

Inventors

• Peter Dammann · Remscheid, DE
• Heinz Schippers
• Herbert Turk · Remscheid, DE
• Herbert Schiminski · Hückeswagen, DE

Key dates

• Filing date: May 1, 1980
• Grant date: Mar 30, 1982
• Expiry date: May 1, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S57/901
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A process for the production of a core/mantle yarn, in which a core thread is continuously conducted through a spinning zone in a gap formed between two adjacent and oppositely moving surfaces; staple fibers are fed into the path of the core thread and come into frictional contact with the moving surfaces in said zone to spin the staple fibers about the core thread; the core thread is preferably stretched during the spinning in order to bring about a defined, predetermined elastic stretch of the core thread in the spinning zone; and the core thread has a roughened surface which may be obtained by using a staple fiber yarn or thread obtained by texturizing, weaving, twisting, etc. The invention is especially characterized by an improved adherence of the fibers of the mantle to the core thread by pre-coating the core thread with an adhesive, or preferably by preapplying colloidal silicic acid to the core thread.