January 24, 2026 - A technical sharing in the polymer field from Guangdong indicates that the application effect of glass fiber reinforced resin mainly depends on the aspect ratio and compatibility of glass fiber, and the precise control of glass fiber effective length is crucial. Only when the glass fiber length exceeds the critical value can it fully exert the reinforcement effect. Ideally, the resin should completely wet the glass fiber and form an adhesion layer, and surface treatment with silane coupling agent is a common method to improve the interface bonding force.
    Controlling the effective length of glass fiber requires scientific adjustment of screw configuration to balance sufficient mixing and avoid excessive shear. The process consists of four stages: glass fiber feeding, mixing and dispersing, venting, and uniform compression. Each stage ensures the glass fiber length through specific thread elements, lead design and parameter regulation. Customized screw configuration schemes are needed for different requirements, such as high-performance long fibers, high-viscosity systems, and shear-sensitive recycled materials. As a sophisticated technical engineering, the optimization of glass fiber effective length control technology will further promote the high-quality development of related industries.

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