Process for the production of collagen fibers

US4185011A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventors

• Zdenek Eckmayer · Weinheim, DE
• Alexander Berg · Mannheim, DE
• Joachim Kuhn · Würzburg, DE

Key dates

• Filing date: Oct 16, 1978
• Grant date: Jan 22, 1980
• Expiry date: Oct 16, 1998

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01C3/00
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A process for the preparation of collagen fibers, especially suited for medicinal use, comprising subjecting animal skin, hide or tendons to digestion with a strong alkali until the material has an amide nitrogen content of approximately 0.20 to 0.40 mole per gram, swelling the mass by thorough intermixing with acid, mechanically separating collagen fibers from the mass, de-swelling the collagen fibers with salts or organic solvents, and dehydrating the collagen fibers to approximately 20 to 40 weight % moisture based on the dry weight of the fibers. A plasticizer may be applied to the fibrous mass before dehydration.