Industrial-grade chemicals, high-purity gases, and advanced metal alloys for global manufacturing
Liquid Silicone Rubber (LSR) has rapidly transitioned from a specialty elastomer to a mainstream material of choice for high-precision, high-performance applications globally. Valued for its excellent thermal stability, chemical resistance, biological compatibility, and superior mechanical properties, LSR is replacing traditional elastomers in critical sectors.
Unlike Solid Silicone Rubber (HCR/HTV), LSR is processed via automated injection molding systems that utilize a two-component platinum-cured liquid system (Part A and Part B in 1:1 ratio). This chemistry ensures rapid cure times, zero toxic by-products, and exceptional dimensional stability. Today, the global automotive, medical, and consumer electronics markets rely heavily on LSR to achieve sealing, insulation, and soft-touch interfaces that withstand extreme environments.
Navigating grade selection, regulatory compliance, and testing metrics for international procurement
Procuring LSR components globally requires a deep understanding of formulation grades and physical specifications. Leading suppliers classify LSR into distinct grades depending on the end application, each governed by global regulatory compliance certificates.
Designed for long-term and short-term implantable devices, diagnostic tools, and surgical tools. Complies strictly with ISO 10993 and USP Class VI biocompatibility testing. Processed in Class 7 or 8 cleanrooms.
Tailored for high oil resistance, low compression set, and extreme temperature tolerance. Widely used in engine gaskets, electrical wire seals, single-wire seals (SWS), and EV battery pack thermal interfaces.
Complies with FDA 21 CFR 177.2600 and European LFGB standards. Free from volatile compounds. Used extensively in baby bottle nipples, kitchenware, water filtration seals, and wearable smart devices.
| Parameter | Unit / Standard | Medical / FDA Grade | Self-Lubricating Automotive Grade | High-Transparency Optical Grade |
|---|---|---|---|---|
| Hardness Range | Shore A (ASTM D2240) | 30 - 80 ± 5 | 40 - 70 ± 5 | 50 - 80 ± 5 |
| Tensile Strength | MPa (ISO 37) | ≥ 9.0 | ≥ 8.0 | ≥ 7.5 |
| Elongation at Break | % (ISO 37) | ≥ 450% | ≥ 350% | ≥ 250% |
| Compression Set | % (22h @ 175°C) | ≤ 15% | ≤ 12% | ≤ 20% |
| Refractive Index | nD25 | N/A | N/A | 1.41 - 1.54 |
| Key Certifications | Compliance | USP Class VI, ISO 10993 | IATF 16949, REACH, RoHS | FDA, UL 94 V-0/V-1 |
China's LSR manufacturing ecosystem has evolved from labor-intensive assembly to advanced, automated smart factories. Operating under the "Industry 4.0" framework, Chinese LSR factories utilize closed-loop, fully automated liquid injection molding (LIM) lines integrated with robotic demolding systems.
By localized sourcing of high-purity organosilicon raw materials and leveraging domestic precision mold-making capabilities, Chinese factories achieve unmatched cost efficiencies and rapid tooling turnaround times. This robust supply chain resilience allows manufacturers to pivot quickly, adjusting material formulations and scale of production to meet sudden shifts in global market demands.
The decision to partner with Chinese LSR manufacturers is driven by two primary factors: speed to market and technological sophistication.
Chinese factories excel at producing complex, multi-cavity liquid injection molds (up to 64 cavities) with cold runner systems. Cold runner technology ensures near-zero waste during production, lowering the cost-per-part significantly. Coupled with raw materials sourced directly from leading chemical clusters, buyers receive top-tier physical properties at competitive price points.
Additionally, integrated downstream services—such as post-curing ovens for volatile removal, automated optical inspection (AOI) for dimensional control, and ISO Class 8 cleanroom assembly—provide a true one-stop-shop for global OEMs in automotive, medical, and electronics fields.
How global industries integrate liquid silicone rubber to solve critical engineering challenges
Scenario: Protection against thermal runaway in high-power lithium-ion packs.
Solution: LSR thermal insulation pads and flame-retardant gasket seals (UL 94 V-0) molded directly onto battery covers to prevent moisture and gas intrusion.
Scenario: Sweat-resistant, non-irritating straps and skin-contact sensors.
Solution: Biocompatible consumer-grade LSR with silk-feel surface treatment, ensuring high resistance to UV radiation, sebum, cosmetic oils, and household detergents.
Scenario: High-precision check valves and peristaltic pump tubes.
Solution: High-tear-strength medical LSR (USP Class VI) fabricated under cleanroom standards to prevent chemical leaching or particulate shedding during long-term surgical procedures.
Yanxatech System Industries Limited (hereinafter referred to as YANXA) is one of the growing suppliers in the field of specialty materials in China. Starting from a fledgling small business unit in 2008, YANXA is driven with the passion of developing a broad international market in the area relating to chemical and mechanical industries. Thanks to our team’s enduring and persistent work and our business partners’ long-lasting support, YANXA has steadily and vigorously grown into one company with excellence in delivering products and services relating to specialty chemicals.
Cooperating with leading manufacturers and the renowned research institutes in the field of specialty chemicals in China, YANXA is capable of supplying:
1) Liquid rubber;
2) Nitrate;
3) Metal powder & metal alloyed powders.
Our Business Philosophy: Quality, safety, and efficiency prevail over all values in our business. We care about what our customers need for general products as well as their unique and specific requirements for newly developed applications in a timely manner. We adhere strictly to technical requirements and make deliveries in almost perfect conformity. Chemical businesses expose more safety concerns than any other industrial sectors. We undertake all activities involving chemicals in a safe way to ensure the safety of human health and the environment.
Comprehensive technical specifications and structural features of YANXA's hot chemical and powder products
Colorless liquid, easily polymerized, soluble in water, alcohol and ether. Supplied as formalin (37-50%).
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White crystalline powder. CAS No.: 100-97-0. Condensation product of formaldehyde and ammonia.
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White solid linear polymer of formaldehyde with no fixed melting point. Active content ≥ 96%.
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ISO9001:2008 certified. High-quality atomized alloy powder for aerospace, energetic, and chemical processes.
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High-purity semiconductor etching gas and coolant agent. Safe and non-corrosive properties.
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Food and industrial grade formulation, serving as anticaking agent and calcium supplement matrix.
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Dielectric gas used in electrical power grids, gas-insulated switchgears, and electronic etching.
Read More+Our manufacturing partners operate under strict ISO 9001:2008 and ISO 9001:2015 Quality Management Systems. We recognize that high-purity materials demand flawless processing controls. From the incoming inspection of raw chemical intermediates to the gas chromatography mass spectrometry (GC-MS) analysis of high-purity electronic gases, each process is documented with a corresponding Certificate of Analysis (COA) to guarantee conformity with customer requirements.
Detailed technical, commercial, and logistical guidance from our materials specialists
High-grade compounds, catalysts, and gases ready for international delivery
Yanxatech
