Our composite foam silicone tubes integrate high-purity silicone’s environmental adaptability, closed-cell foam’s buffer insulation, and reinforced layer’s mechanical stability, adopting a multi-layer composite design (inner silicone layer + middle foam layer + outer protective layer/braided layer). Engineered via precision co-extrusion and platinum vulcanization technology, the products meet FDA, RoHS, and UL94 standards, providing reliable solutions for thermal insulation, shock absorption, se
Our composite foam silicone tubes integrate high-purity silicone’s environmental adaptability, closed-cell foam’s buffer insulation, and reinforced layer’s mechanical stability, adopting a multi-layer composite design (inner silicone layer + middle foam layer + outer protective layer/braided layer). Engineered via precision co-extrusion and platinum vulcanization technology, the products meet FDA, RoHS, and UL94 standards, providing reliable solutions for thermal insulation, shock absorption, sealing, and fluid transfer in automotive, industrial, medical, and household appliance sectors.
Multi-Layer Composite Structure & Core Performance Advantages
The optimized three-to-four-layer structure balances sealing, insulation, and durability, with each layer tailored to functional needs—inner layer for fluid compatibility, middle foam layer for buffer/insulation, and outer layer for protection/reinforcement:
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Excellent buffer & shock absorption: Middle closed-cell foam layer (density 0.3-0.6g/cm³) achieves compression rebound rate ≥90% (50% compression, 72h at 150℃), absorbing 60%+ impact energy. Effectively reduces vibration transmission in equipment pipelines, avoiding damage to precision components and reducing operational noise by 30%.
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Superior thermal insulation performance: Closed-cell foam structure blocks heat conduction, with thermal conductivity ≤0.035W/(m·K) at 25℃. Supports continuous operating temperature of -60℃ to 200℃ (short-term 250℃), maintaining stable insulation effect in extreme temperature differences—ideal for high-temperature fluid transfer and low-temperature protection scenarios.
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Reinforced mechanical & sealing performance: Outer layer (wear-resistant silicone or nylon braid) enhances tensile strength to ≥6MPa, elongation at break ≥300%, and operating pressure to 1.5-3.0MPa (burst pressure ≥9MPa). Inner smooth silicone layer (Ra ≤0.08μm) ensures leak-proof sealing, resisting pH 1-14 chemicals and avoiding fluid residue accumulation.
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Environmental adaptability & safety: Platinum-vulcanized materials are non-toxic, odorless, and low-migration (volatile substances ≤0.5%), meeting FDA 21 CFR 177.2600 (food grade) and USP Class VI (medical grade) standards. Resists ozone, UV radiation, and oil erosion, with no performance degradation after 5000h outdoor exposure.
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Precise dimensional control: Inner diameter 3mm-100mm, outer diameter 6mm-115mm, wall thickness 1.5mm-6mm, with dimensional tolerance ±0.1mm. Supports custom cross-sections (circular, oval) and lengths, adapting to narrow-space installation and special equipment matching.
Precision Manufacturing & Strict Quality Control
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Layer material preparation: Inner layer uses high-purity methyl vinyl silicone, middle foam layer adopts modified silicone with high-efficiency foaming agents (no CFCs), and outer layer selects wear-resistant silicone or high-strength fiber. All raw materials undergo purity and thermal stability testing before use.
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Multi-layer co-extrusion & foaming: Three-screw co-extrusion equipment forms integrated layers at 180-200℃, with precise control of foaming temperature and pressure to ensure uniform foam cell distribution (cell diameter 0.1-0.3mm) and no layer delamination.
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Vulcanization & post-treatment: High-temperature vulcanization (200℃ for 12min) stabilizes the composite structure, followed by surface polishing or braiding reinforcement. Foam layer undergoes closed-cell rate testing (≥95%) to ensure insulation and water resistance.
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Comprehensive testing: Each batch undergoes 14-item inspections, including thermal conductivity test, compression rebound test, burst pressure test, high-temperature aging test, and FDA migration test. Outgoing qualified rate reaches 99.8%.
Key Application Scenarios & Technical Verification
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Automotive & New Energy: Used as battery cooling pipeline insulation sleeves, engine compartment vibration-damping tubes, and air conditioning hose insulation. The foam layer reduces heat loss by 40% and vibration noise by 30%, meeting ISO 11452-2 automotive standards. A new energy vehicle factory extended battery service life by 2 years.
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Industrial & Chemical: Applied for high-temperature steam pipeline insulation and chemical fluid transfer. Thermal insulation performance reduces energy consumption by 25% for a chemical plant, while the closed-cell foam avoids moisture intrusion and corrosion.
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Household Appliances: Used as oven insulation sleeves, water heater pipelines, and refrigerator refrigerant tubes. Withstands 200℃ high temperature and -60℃ low temperature, maintaining stable insulation and reducing appliance energy consumption by 15%.
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Medical & Food: FDA-certified versions for high-temperature food processing (hot syrup, edible oil) and medical sterilization equipment. The foam layer insulates heat to protect operators, while the inner layer ensures no flavor migration—helping a food factory pass LFGB audit smoothly.
Custom Solutions & Efficient Service
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Multi-dimensional customization: Customize foam density (0.3-0.6g/cm³), temperature grade (200℃/250℃ short-term), outer layer type (silicone/braid), and dimensions (3mm-100mm inner diameter). Optional flame-retardant (UL94 V-0), anti-static (surface resistance 10⁶-10⁹ Ω), and oil-resistant treatments.
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Functional upgrades: Optional high-temperature resistant quick connectors, sterile packaging (medical use), and cut-to-length services with chamfered ends. For insulation scenarios, provide custom thickness foam layers to meet specific thermal requirements.
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Fast response & compliance support: Technical consultation and quotation within 24 hours; custom samples (with foam performance test reports) delivered in
