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Automotive

Lightweighting Cost Reduction with Integrated Nois

Thermally Expandable Microspheres revolutionize automotive materials through minimal dosing:
• Lightweighting & Cost Efficiency as the foundation;
• Closed-cell structure concurrently delivers triple value:
🔇 Noise Insulation | 🔥 Thermal Protection | 🛡 Safety & Durability;
• Physical foaming process pioneers eco-friendly manufacturing transformation,
creating new possibilities for high-performance vehicles in the era of energy conservation.

Application Cases

Sealing strips for doors and window

Adding a small amount of thermally expandable microspheres to EPDM/TPV sealing strips for doors and windows forms a dense closed-cell structure through heat activation during extrusion. This achieves weight reduction while enhancing sound and thermal insulation. The closed-cell design effectively blocks sound wave transmission, reducing in-cabin noise and improving surface smoothness.

Automotive Body Coatings

Chassis Armor Coating & Anti-corrosion Coating — Thermally expandable microspheres are incorporated as physical blowing agents into PVC plastisols. After high-pressure spraying and thermal activation, they form lightweight closed-cell layers. This maintains coating thickness while reducing material consumption. The dense closed-cell structure blocks moisture and salt penetration, significantly enhancing corrosion resistance, and absorbs impact noise from road debris while improving vibratio

Cavity Filling for Housing Components

For hollow structures such as A/B pillars and door beams, a mixture of one-component adhesive and microspheres is spray-filled into cavities. After baking, the microspheres expand to achieve 100% cavity sealing. This solution replaces traditional polyurethane foaming processes, eliminating toxic chemicals while enhancing construction efficiency. It simultaneously reduces body-transmitted vibration and lowers costs.

GMT Sheet Reinforcement

By incorporating thermally expandable microspheres into Glass Mat Reinforced Thermoplastics (GMT) for roof panels and door trims, the microspheres expand during compression molding to compensate for matrix density. This increases sheet thickness without adding weight, while the closed-cell structure simultaneously enhances compressive strength and sound insulation, effectively blocking rain impact noise on vehicle roofs.

Automotive Roof Insulation Layer

The roof headliner insulation layer utilizes microsphere-blended polyurethane foam to form a closedcell structure with low thermal conductivity. This structure reflects solar radiation, reducing interior temperatures and lowering air conditioning energy consumption.

Sound-Absorbing Core Material for Door Panels

Within the interlayer of door inner panels, thermally expandable microspheres are added to recycled cotton or non-woven fabrics, then hot-pressed into a porous sound-absorbing core material. The closed-cell structure enhances mid-to-high-frequency noise absorption, while its hydrophobic properties prevent water absorption and mold growth, significantly improving material durability.

NVH Sound Insulation Pad

Engine bay and wheel arch insulation pads are made by blending microspheres with butyl rubber and compression-molded into a high-damping material. The lightweight design reduces weight, while its wide-frequency sound insulation covers low-frequency engine noise and mid-frequency tire-road noise.

Thermal Insulation Buffer Layer for Power Battery Packs

The inter-module filling layer in EV battery packs utilizes a silicone-based material infused with hightemperature resistant microspheres, enabling endurance under extreme thermal conditions. Its closedcell structure delays heat propagation rate, enhancing thermal runaway protection capabilities. The lightweight design reduces weight compared to ceramic fiber mats, indirectly increasing battery energy density.

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Transcending Boundaries, Achieving Together

Feipi specializes in R&D and production of high-performance thermally expandable microspheres. Through independent innovation, we break technological monopolies and reshape material futures with core patents.

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