A recyclable polypropylene resin system is developed for automotive lightweight needs, solving the pain point of difficult recycling of traditional epoxy-based prepregs. It has good molding performance and can be quickly cured at 180-220°C, compatible with large-scale mass production needs of auto parts. The glass fiber treated with maleic anhydride grafting improves the interface bonding force between fiber and polypropylene resin, avoiding delamination during use. The density is only 1.0g/cm³, which is 70% lighter than steel, effectively reducing the total vehicle weight and improving fuel economy and cruising range, complying with the automotive industry's environmental protection recycling requirements.
The reinforcement material is continuous unalkali glass fiber, the matrix resin is homopolymer polypropylene resin, the areal weight is 300-350gsm, the prepreg thickness is 0.25-0.3mm, the resin content is 35±2%, the curing temperature range is 180-220°C, the curing time is 1-3 minutes for hot stamping molding, the tensile strength ≥1200 MPa, the tensile modulus ≥40 GPa, the density is 1.0±0.05g/cm³, 100% recyclable, complying with ISO 14001 environmental protection certification. It is packaged in waterproof and moisture-proof packaging, with each roll length of 80m and width of 1200mm optional, with a peelable release film for easy layup operation.
It is mainly used in the automotive lightweight field, including battery trays of new energy vehicles, automotive interior and exterior panels, seat frames, door anti-collision beams and other components. It is compatible with mass production processes such as hot stamping molding and injection molding for auto parts, helping automobile manufacturers reduce the total vehicle weight by 15-20%, improve cruising range or fuel economy, complying with EU automotive recycling regulations, and can also be used for lightweight structural parts of rail transit and ship manufacturing.
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