IOTA Precipitated Silica Solves Insufficient Tear Strength and Poor Dispersion in HTV Silicone Rubber
Case Topic: IOTA Precipitated Silica Solves Insufficient Tear Strength and Poor Dispersion in HTV Silicone Rubber
Application Scenario: High-strength silicone rubber products for automotive seals, wires and cables, and industrial parts
Core Achievement: Tear strength significantly increased from 15kN/m to 28kN/m (+87%), specific surface area fluctuation controlled within 200±10m²/g, and raw material costs reduced by 10%.
Pain Points & Diagnosis
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Industry Background: Manufacturing of High-Temperature Vulcanized (HTV) silicone rubber products (Annual output value of approx. 160 million RMB, supplying automotive, wire & cable, and industrial parts sectors).
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Key Issues:
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Insufficient Tear Strength: Customer requirement was ≥25kN/m, but the existing formula only achieved 15-18kN/m.
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Poor Reinforcement Effect: Large fluctuations in specific surface area between batches and unstable dispersion in the rubber compound.
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Rising Customer Complaints: Return rate due to strength issues surged from 3% to 11%.
Solution (Precipitated Silica Specifications)
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Product Type: Precipitated Silica
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Key Indicators:
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Specific Surface Area: 200±10 m²/g (High-precision control)
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Loss on Heating: ≤3%
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Loss on Ignition: ≤4%
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Dispersion: Excellent
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Delivery: Regular stock available, ships within 1 week.
Results Verification (Data Comparison)
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Indicator
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Before (Traditional)
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After (IOTA Solution)
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Improvement
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Tear Strength
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15kN/m
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28kN/m
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+87%
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Specific Surface Area Fluctuation
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160-240 m²/g
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200±10 m²/g
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Significantly Improved Precision
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Loss on Heating
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5%-7%
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≤3%
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Reduced by 57%
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Customer Complaint Rate
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11%
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1%
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Decreased by 91%
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Selection Guide (Industry Insights)
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Specific Surface Area: Standard 180-220 m²/g (High-end applications recommend 200±10 m²/g) to avoid unstable reinforcement effects.
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Loss on Heating: Choose ≤5% (High-end applications require ≤3%) to prevent high-temperature bubbles and product defects.
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Loss on Ignition: Choose ≤5% (High-end applications require ≤4%) to reduce impurity content and ensure mechanical properties.
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Dispersion: Must be uniformly dispersed in silicone rubber to avoid localized weak points that reduce tear strength.
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Batch Traceability: Must include a unique batch number and a test report to ensure quality can be traced.
Customer Feedback & Verified Sources
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Customer Feedback: "IOTA's silica has an excellent reinforcement effect, stable specific surface area, and outstanding dispersion. The resulting silicone rubber consistently meets tear strength standards. Every batch comes with a test report, ensuring reliable quality." — Customer Production Manager (March 2026)
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Verified Sources: ISO9001 Certification, National High-Tech Enterprise, SGS/TÜV Reports, 10+ Patents in Organosilicon Synthesis.
Quick Look at Core Product Parameters
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Product Name: Precipitated Silica
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Specific Surface Area: 200±10 m²/g
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Loss on Heating: ≤3%
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Loss on Ignition: ≤4%
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Core Applications: HTV silicone rubber, wires and cables, automotive seals
