quality LSR Liquid Silicone Rubber & Food Grade Liquid Silicone Rubber manufacturer

Liquid Silicone Rubber (LSR) is a two-component, platinum-cured elastomer widely used in modern manufacturing. Known for its excellent flexibility, durability, and safety, liquid silicone rubber has become a preferred material in industries such as medical devices, baby products, electronics, automotive, and personal care products.   Unlike traditional solid silicone rubber, liquid silicone rubber is supplied in a pumpable liquid form and processed through injection molding. This allows manufacturers to achieve high precision, fast production cycles, and consistent product quality. Because of its excellent flowability, LSR can fill complex molds and produce intricate components with minimal defects.   One of the most significant advantages of liquid silicone rubber is its excellent thermal stability. It can typically withstand temperatures ranging from -50°C to 200°C without losing its mechanical properties. This makes LSR ideal for products that require long-term durability under extreme conditions.   Another important benefit is its biocompatibility and safety. Medical-grade liquid silicone rubber is widely used in medical devices such as catheters, masks, valves, and respiratory components. It is odorless, non-toxic, and resistant to bacteria growth, making it suitable for healthcare and food-contact applications.   Liquid silicone rubber also offers outstanding flexibility and resilience. Even after repeated compression, stretching, or bending, the material quickly returns to its original shape. This property is particularly valuable for seals, gaskets, wearable devices, and soft-touch components.   From a manufacturing perspective, LSR supports high-efficiency automated production. The injection molding process allows for fast curing times, minimal material waste, and excellent repeatability. This helps manufacturers reduce labor costs while maintaining stable product performance.   In addition, liquid silicone rubber has excellent weather resistance and UV stability, allowing products to maintain their appearance and performance even after long-term outdoor exposure.   With these advantages, liquid silicone rubber continues to replace traditional elastomers in many high-performance applications. As industries demand safer, more durable, and more precise materials, LSR is becoming an essential solution for advanced manufacturing.   For manufacturers seeking reliable silicone materials, choosing a professional supplier with strong R&D and production capabilities is crucial. Contact Information Guangzhou Ruihe New Material Technology Co., Ltd. Tel: +86 13421773611 Whatsapp / Wechat: +86 13421773611 Email: wendy@ruihesilica.com

  As global consumers pay more attention to food safety, durability, and sustainability, liquid silicone rubber (LSR) has become one of the most widely used materials in modern kitchenware manufacturing. From baking molds and cooking utensils to food containers and sealing components, LSR provides manufacturers with a safe, flexible, and highly durable solution for food-contact products. What Is Liquid Silicone Rubber? Liquid silicone rubber is a two-component platinum-cured elastomer that can be processed through injection molding or compression molding. Compared with traditional rubber or plastic materials, LSR offers excellent heat resistance, chemical stability, and food safety performance, making it particularly suitable for kitchenware applications that require direct contact with food. Many food-grade LSR materials meet international standards such as LFGB, FDA, and other food-contact regulations, ensuring that kitchen products remain safe even under high temperatures or repeated use. Key Advantages of Liquid Silicone Rubber in Kitchenware Food-Grade Safety One of the biggest advantages of LSR is its non-toxic and odorless composition. High-quality food-grade silicone does not release harmful substances when exposed to heat, which makes it safe for cooking, baking, and food storage applications. Excellent Heat Resistance Liquid silicone rubber can typically withstand temperatures from -50°C to over 200°C, allowing kitchen products made from silicone to be used in ovens, microwaves, refrigerators, and dishwashers without performance loss. Flexible and Durable Kitchen tools such as spatulas, baking molds, and lids require materials that are both flexible and long-lasting. LSR provides high elasticity, tear resistance, and long service life, helping manufacturers produce durable products that maintain shape even after repeated use. Easy Cleaning and Non-Stick Performance Silicone kitchenware offers natural non-stick properties, making it easier to clean and maintain. This is especially valuable for baking molds and cooking utensils where food residue must be minimized. Design Flexibility Liquid silicone rubber supports precision injection molding, enabling manufacturers to produce complex shapes, thin-wall structures, and ergonomic designs. This flexibility supports the development of innovative kitchenware such as collapsible containers, silicone lids, and multifunctional cooking tools.   Typical Applications of LSR in Kitchenware Liquid silicone rubber is widely used in: Silicone baking molds and cake pans Cooking spatulas and kitchen utensils Silicone lids and sealing rings Ice cube trays and chocolate molds Food container sealing parts Heat-resistant kitchen mats and gloves   These products benefit from silicone’s heat resistance, flexibility, and food safety, making them popular in both home kitchens and professional food preparation environments.   Conclusion With the growing demand for safe, reusable, and eco-friendly kitchen products, liquid silicone rubber continues to expand its role in kitchenware manufacturing. Its combination of food safety, durability, flexibility, and processing efficiency makes LSR one of the most reliable materials for modern kitchen applications. Contact Tel: 86 13421773611 Whatsapp/Wechat: 86 13421773611 Email: wendy@ruihesilica.com  

Self-lubricating Liquid Silicone Rubber (LSR) is gaining attention as a practical material choice for manufacturers who want smoother assembly, quieter movement, and more consistent surface performance in molded silicone parts. Unlike conventional silicone rubber that may rely on external lubricants, self-lubricating LSR is designed to form a thin oil layer on the cured surface, creating a natural slip effect. This can reduce friction during installation and use, improve demolding, and help finished parts maintain stable performance over time.   At GUANGZHOU RUIHE NEW MATERIAL TECHNOLOGY CO.,LTD, our self-lubricating LSR grades are developed for injection molding, especially where friction, drag, or squeak impacts product quality. Typical applications include waterproof sealing parts (sealing rings, gaskets, caps, plugs, splash-proof seals) and furniture seals & sliding components (drawer rails, soft-close structures, edge protectors, anti-wear contact parts). In these products, low friction is not a “nice-to-have”—it directly supports faster assembly, smoother movement, and reduced wear marks.   Two commonly selected grades are 6250-30SL and 6250-40SL. Both are milky-white and feature self-lubricating surface behavior after curing. The oil content is adjustable, allowing manufacturers to tune slip levels based on part design and end-use needs. It is important to note that self-lubricating grades are not recommended for food-grade products, so selection should match the compliance requirements of your target market. Below is a quick comparison table that helps engineers and sourcing teams shortlist grades based on hardness, strength, and friction-related needs. Self-Lubricating LSR Data Table (Typical) Item 6250-30SL 6250-40SL Appearance Milky white Milky white Hardness (Shore A) 27–31 39–43 Density (g/cm³) 1.09–1.12 1.08–1.11 Rebound (%) ≥50 ≥50 Tear Strength (kN/m) ≥15.0 ≥25.0 Tensile Strength (MPa) ≥5.0 ≥7.0 Elongation (%) ≥500 ≥400 Oil Content (%) 6 6 A-side Viscosity (Pa·s) 1700 1500 B-side Viscosity (Pa·s) 1400 1300 Main Molding Method Injection molding Injection molding For industrial projects focused on sealing, sliding, and assembly efficiency, self-lubricating LSR can be a cost-effective way to improve performance without adding secondary lubrication steps. Contact Tel: 86 13421773611 Whatsapp/Wechat: 86 13421773611 Email: wendy@ruihesilica.com