Method for the manufacture of a fabric-type artificial leather

US4431687A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventors

• Walter Fottinger · Weinheim, DE
• Erich Fahrbach · Weinheim, DE
• Kurt Jorder · Weinheim, DE
• Karl-Heinz Morweiser · Birkenau, DE
• Bohuslav Tecl · Weinheim, DE

Key dates

• Filing date: May 18, 1982
• Grant date: Feb 14, 1984
• Expiry date: May 18, 2002

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2307/73
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The present invention provides a method for manufacturing a fabric-type artificial leather, wherein a nonwoven fabric is formed by using a dry method to join together hydrophobic fibers. The fabric so formed is densified by needling and the activation of shrinking forces. It is then impregnated with a mixture of a heat sensitive elastomeric bonding agent, powdered barium sulfate and a compound that reacts with acid to form a gas. The impregnated fabric is then exposed to a heated, acidified liquid which triggers coagulation of the bonding agent and liberates a gas formed by reaction of the acid and acid-reactive compound. The resulting solidified fabric is then washed, dried and ground-over on at least one side to produce a nap. Finally, the fabric is intensively fulled.