Fiber-reinforced thermoplastic resin pellets and a method for producing the same

CN118752866BActive Publication Date: 2026-07-21BAOTOU COSCO BIO-BASED NEW MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BAOTOU COSCO BIO-BASED NEW MATERIALS CO LTD
Filing Date
2024-07-24
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing technologies struggle to effectively mix plant fibers and regenerated cellulose fibers, resulting in significant damage to the mechanical properties of composite materials. Furthermore, the process is cumbersome, making it difficult to control uniform mixing and causing severe thermal degradation.

Method used

The fiber-reinforced thermoplastic resin granules with a sandwich structure have regenerated cellulose fibers and plant fibers as the outer and core layers, respectively, and are connected by the same thermoplastic resin in the middle. The granules are prepared by a process of pre-composite fiber material layers, spray modification, hot pressing and coating, and surface coating, avoiding multiple shearing and thermal degradation.

Benefits of technology

It achieves uniform fiber dispersion and maintains mechanical properties, shortens the process flow, improves production efficiency, reduces equipment costs, and produces composite materials with high modulus and strong impact resistance.

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Abstract

The application discloses a kind of fiber reinforced thermoplastic resin granules and its preparation method, the granule has sandwich structure, upper and lower surface layer is regenerated cellulose fiber reinforced thermoplastic resin, core layer is plant fiber reinforced thermoplastic resin, regenerated cellulose fiber and plant fiber are extended along the length direction of granule, surface layer and core layer are impregnated using thermoplastic resin, surface layer and core layer are integrally connected by thermoplastic resin melting between them.The application uses fiber material layer pre-composite→spray modification→hot-pressing composite→surface scraping→continuous production process of strip granulation, without internal mixer and extrusion impregnation device, granule production efficiency is high, equipment investment cost is low.The injection molding part prepared using the granule prepared by the application has high modulus of plant fiber reinforced resin and excellent impact performance of cellulose fiber reinforced resin, and the fibers can be uniformly mixed while maintaining mechanical properties.
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