Preparation of heat stabilized and strengthened cellulose fibers by hot pressing, lamination, and injection molding, useful for polyolefin matrix composites

摘要

A process for increasing the thermal stability of cellulose fibers and filaments by hot pressing, lamination, wrapping, extruding, and injection molding in which the cellulose fiber material, before working into polyolefin matrixes, are steeped in and enveloped with a copolyamide compound from a water-containing or alcoholic solution, and after squeezing out with a pad are dried at 20-120 deg C. Process for increasing the thermal stability of cellulose fibers and filaments by hot pressing, lamination, wrapping, extrusion, and injection molding, the cellulose fiber materials, especially natural fibers such as flax, hemp, jute, ramie, or sisal, and/or regenerated cellulose such as Lyocell, Polynosic (sic), or high wet modulus fibers before working into the polyolefin matrixes and their blends, e.g. of polyethylene or polypropylene copolymer, are steeped in and enveloped with a copolyamide compound from a water-containing or alcoholic solution, and after squeezing out with a pad at a pressure of 1.5-8 bar are dried at 20-120 deg C.