Liquid Silicone Rubber (LSR)

Product Advantage

As one of China’s leading manufacturers of LSR (Liquid Silicone Rubber) injection molding, GYF boasts a comprehensive technical system covering material development, mold design, and multi-material injection. It can meet the stringent requirements of high-standard industries such as medical, infant, automotive, industrial electronics, and smart wearables.

We specialize in producing high-precision, complex geometric, and functionally integrated silicone components, with automated mass production capabilities to achieve stable and consistent global supply.

Core Technical Capabilities

GYF delivers high-precision LSR injection molding with closed-loop pressure/temperature control, micro-injection, and cavity balance for ±5–10 µm consistency in micro and complex parts. Multi-material overmolding (LSR + PP/PC/PA/ABS/TPE/metal) achieves Class 1 bonds via surface treatment, adhesion optimization, and CTE matching—eliminating post-assembly. 2K/3K molding integrates LSR, thermoplastics, and metals for functional, lightweight designs. Advanced flow simulation enables ultra-thin walls (≥0.2 mm), undercuts, and micro-cavities. Custom medical/food-grade, conductive, flame-retardant, and high-temp formulations supported by full certification.

Manufacturable Structures and Functional Component Types

✔ Micro thin-walled parts (0.2–0.4 mm)

✔ Waterproof and sealing structures (IP67/68)

✔ Functional buttons & dust/sweat-proof components

✔ Conductive, thermal conductive, and flame-retardant functional parts

✔ Overmolded structures (integrated plastic/metal)

✔ Complex geometric parts (undercuts, micro-grooves, micro-holes)

✔ Optical-grade transparent parts (lenses, light covers)

Customizable LSR Material Properties

Medical/Food-grade: FDA, LFGB certified, high purity.

Industrial/Automotive-grade: High-temperature resistance (250°C), fuel and grease resistance, chemical corrosion resistance.

Electronic functions: Conductive, insulating, high flexibility, anti-yellowing, UV resistance.

Special functions: Flame-retardant, antibacterial, airtightness, blue light blocking, enhanced adhesion.

Typical Production Cases

Medical: Ventilator seals, infusion tube connection caps, sampling tube sealing plugs

Infant & Toddler: Pacifiers, teething toys, maternal and child feeding accessories, children’s protective parts

Smart Wearables: Watch straps, buttons, sensor waterproof rings, back cover buffer seals

Automotive: LED lamp sealing rings, sensor overmolded parts, wiring harness waterproof rings

Industrial Electronics: Battery waterproof rings, flame-retardant buttons, thermal conductive silicone overmolded components

Quality Systems and International Certifications

✔ IATF16949 (Automotive)

✔ ISO13485 (Medical)

✔ FDA (Food Contact)

✔ ISO22000 (Food Safety)

Full-process traceability | Automated inspection | Batch consistency control | High-cleanliness production

Automated Mass Production

As a high-end silicone molding technology provider, GYF takes automation and intelligent manufacturing as the core driving force, building a full-process automated mass production system from feeding, molding, part removal, inspection to packaging, effectively improving efficiency and delivery consistency.

Hardware Strength Supporting Automation (GYF)

138 compression molding hydraulic presses

50 liquid silicone rubber (LSR) injection molding machines

48 precision injection molding equipment

15 high-efficiency extrusion production lines

In-house mold center + automation R&D team

Multi-factory collaboration (Shenzhen/Huizhou/Dongguan, China + Bangkok, Thailand)

Automation is not only about high efficiency, but also a guarantee of global quality consistency.

High-Precision Molding

GYF’s high-precision LSR molding leverages closed-loop servo injection (±0.01 g repeatability), advanced process control, and precision molds (Ra ≤ 0.4, ±0.01–0.02 mm tolerance) to produce flash-free micro parts with sharp details. Vacuum venting and thermal-electric balance eliminate gas traps and shrinkage. Multi-material molds enable reliable LSR overmolding on plastics/metal inserts. Solutions meet stringent demands for dimensional accuracy, sealing integrity, and stability in medical, automotive electronics, wearables, and industrial applications—ensuring consistent, high-yield production of complex, integrated components.

Multi-material Overmolding

GYF leads in multi-material LSR overmolding onto thermoplastics, metals, ceramics, and electronics—achieving robust bonds via chemical adhesion, mechanical interlocking, and micro-textured interfaces. Applications span medical anti-slip parts, waterproof wearables, shock-protected electronics, and decorative smart-device components. 2K/3K molding integrates sealing, soft-touch zones, and rigid structures in one shot. In-house tooling features pre-locking designs and bonding-enhancing textures. Multi-cavity, multi-station automation with robotics ensures high repeatability, reliability, and scalable production of complex, functionally integrated parts.

Extreme Environment Resistance

Based on material formulation research, crosslinking structure enhancement, and optimization of various molding processes, GYF can customize silicone products that work stably for a long time under harsh conditions such as extreme temperature, humidity, chemical corrosion, mechanical stress, and ultraviolet (UV) radiation. Whether facing high-frequency motion wear, medical disinfection impact, marine salt spray corrosion, or extreme temperature changes inside and outside automotive cabins, GYF ensures the product’s sealing performance, adhesion, dimensional stability, and functional reliability.

Customizable Performance Range

GYF’s high-performance LSR materials operate from –60°C to 260°C, offering IPX8 waterproofing, oil/chemical/salt spray resistance, and >10-year UV/ozone stability—ideal for wearables, marine, automotive, and medical applications. Custom formulations include medical/food-grade, flame-retardant, conductive, and high-temp variants. Structural-material co-design (ribs, bevels, gradient overmolding) enhances reliability. Advanced processes—LSR injection, plasma treatment, post-cure—and in-house testing (thermal cycling, salt spray, compression set, fatigue) ensure long-term durability, safety, and performance in extreme environments.

Precision Micro & Functional Silicone Components

Relying on precision mold development, microchannel control, ultra-thin parting surface sealing technology, and material rheology optimization capabilities, GYF can stably mass-produce micro-sized, complex, and multi-functional silicone structural parts. These products meet high-demand scenarios such as precision sealing, accurate touch control, conductive transmission, biocompatible implantation, and integrated overmolding.

Such products typically face technical challenges including micro-size (minimum wall thickness 0.1–0.3 mm), complex geometry, integrated functions, and extremely high requirements for precision and consistency. Through the synergy of compression molding, extrusion, and Liquid Silicone Rubber (LSR) injection technologies, GYF achieves extremely high design freedom and batch repeatability.

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Customization Advantages and Commitments

Through flexible production processes and highly customized services, GYF provides global customers with adaptable and innovatively designed silicone products. Our customization capabilities extend beyond cross-sectional shapes and colors — we can fully adjust products based on your functional requirements (such as high-temperature resistance, flame retardancy, conductivity, anti-aging, etc.), ensuring every product perfectly fits your application scenarios and brand positioning.
GYF: Custom Extruded Silicone Products for High-Quality Solutions

GYF is committed to providing high-quality customized extruded silicone products for various industries. With precise extrusion technology, efficient production processes, and strict quality control, we help customers enhance product competitiveness and meet stringent industry standards. Whether for medical, automotive, food-grade, consumer electronics, or industrial equipment sectors, we deliver personalized and innovative silicone solutions tailored to your specific needs.
Choosing GYF means unlocking greater value — you will gain:

Long-term consistent production reliability
Global certification support
Fast market entry
Multi-material integrated design for cost reduction and performance improvement
Reduced defect rates and increased mass production returns
Capability for mass-producing micro-sized and complex structural components
Realization of differentiated product competitiveness
Choose GYF for Quality Advantages

✔ Full-process tracking: Material → Mold → Molding → Inspection → Packaging
✔ Automation reduces errors: Independent of manual quality control, suitable for global mass production
✔ Complete certifications for export support: FDA, ISO13485, IATF16949, ISO22000, etc.
✔ Strict testing ensures reliability: Applicable to high-demand markets such as medical-grade, industrial-grade, and automotive-grade
✔ Ultra-high batch consistency: Low defect rate and high efficiency to ensure the stability of customers' supply chains