Bio-based composite materials and method for manufacturing the same

By blending polypropylene with plasticized starch, modified calcium, or modified cellulose, along with modifiers and surfactants, the bio-based composite material addresses miscibility issues and achieves comparable mechanical and heat resistance to polypropylene, while being biodegradable and reducing carbon emissions.

JP2025056851AActive Publication Date: 2025-04-09VASU NETWORKS HK LTD
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Patent Information

Application Number
JP2023166350
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-09-27
Publication Date
2025-04-09
Estimated Expiration
2043-09-27

AI Technical Summary

Technical Problem

The miscibility issues between polar biomass materials like starch, cellulose, and biological calcium, and non-polar polypropylene lead to defects such as air bubbles, heterogeneous distribution, poor mechanical performance, and high brittleness in composite products.

Method used

A bio-based composite material is developed by blending polypropylene with plasticized starch, modified organism-derived calcium, or modified cellulose, along with various modifiers and surfactants, to improve compatibility and achieve mechanical and heat resistance equivalent to polypropylene.

Benefits of technology

The bio-based composite material exhibits similar mechanical and heat resistance properties to polypropylene while offering biodegradability and reduced carbon emissions, with a biomass content that can reach up to 60%.

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Abstract

To provide a bio-based composite material with excellent mechanical properties and high environmental performance.SOLUTION: A bio-based composite material comprises: 45 to 75 pts.wt. of polypropylene; and 25 to 55 pts.wt. of biomass material, wherein the biomass material is any one of or a combination of two or three of a plasticized starch, a modified biogenic calcium, and a modified cellulose. The bio-based composite material further comprises: 1 to 3 pts.wt. of a linear low-density polyethylene as a modifier; 3 to 5 pts.wt. of an ethylene-vinyl acetate copolymer as a modifier; 2 to 3 pts.wt. of a monoglyceride as a surfactant; 2 to 3 pts.wt. of a polyethylene wax as a modifier; 2 to 3 pts.wt. of a silane coupling agent as a modifier; 0.1 to 0.2 pts.wt. of an antioxidant; and 0 to 3 pts.wt. of a polypropylene graft maleic anhydride as a modifier.SELECTED DRAWING: Figure 1
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