A kind of bamboo fiber PU and preparation method thereof

By adding delignin bamboo fibers to the surface and foam layers of the automotive interior PU material, and using a combined structure of water-based treatment layer and base cloth layer, the problem of easy layer separation of bamboo fiber PU material is solved, high peel strength and good inter-layer connection are achieved, and environmental protection and durability requirements of automotive interior are met.

CN119734505APending Publication Date: 2025-04-01SUZHOU GREENTECH CO LTD
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Patent Information

Application Number
CN202510246382.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-04
Publication Date
2025-04-01

AI Technical Summary

Technical Problem

Bamboo fiber PU material for automotive interiors is easy to layer and cannot meet the molding requirements of irregular interior parts. At the same time, there are environmental protection and durability problems.

Method used

The combination structure of the aqueous treatment layer, the PU surface layer, the PU foam layer and the base cloth layer is adopted. By adding delignin bamboo fibers to the PU surface layer and the foam layer, and using maleic anhydride esterified and cetyl trimethoxysilane modified bamboo fibers, the compatibility and connection strength of the fibers with PU substrate are improved.

Benefits of technology

The obtained bamboo fiber PU material is not prone to mold growth in humid and hot environments, has high peel strength and good interlayer connection, which meets the hygiene and durability requirements of the automotive interior.

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Abstract

The present application relates to the field of PU, and specifically discloses a bamboo fiber PU and a preparation method thereof. The bamboo fiber PU prepared in the present application comprises an aqueous treatment layer, a PU surface layer, a PU foaming layer, and a base fabric layer, wherein the PU surface layer and the PU foaming layer are added with bamboo fiber for antibacterial purposes, and the bamboo fiber is further defined as delignified bamboo fiber, and the delignified bamboo fiber in the PU surface layer is further defined as delignified bamboo fiber modified with hexadecyltrimethoxysilane, and the delignified bamboo fiber in the PU foaming layer is delignified bamboo fiber esterified with maleic anhydride, so that the bamboo fiber is more flexible and fits better in PU, is tightly entangled and not easy to delaminate, and has better peeling strength.
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