Fumed Silicone Rubber for Keypad Manufacturing

Fumed Silicone Rubber for Keypad Manufacturing is a high-performance material engineered for precision and durability in demanding applications. With its fast vulcanization speed, exceptional strength, and excellent processing capabilities, this silicone rubber is tailored for producing resilient keypads and versatile consumer goods. Certified by ROHS, REACH, and LFGB standards, it guarantees safety for both industrial and food-contact applications, making it ideal for electronic keypads, kitchenware, wearable accessories, and more.

Product Advantages

1. Fast vulcanization: Vulcanizes rapidly under 175°C in just 5 minutes (15 MPa pressure), boosting production efficiency.

2. High tensile strength and flexibility: High tensile strength (up to 8 MPa) and elongation rates (up to 900%) ensure durability and resistance to wear.

3. Excellent processing performance: Excellent moldability and stability across a wide hardness range (Shore A 20–80) for precise customization.

4. Food safety certification: LFGB compliance ensures suitability for kitchenware and food-contact products.

5. High temperature resistance and environmental protection: Low compression set (≤10% at 175°C) and eco-friendly certifications (ROHS/REACH) meet stringent global standards.

Type number	HF-230A	HF-230B	HF-230C	HF-270
Shore A	60±3	60±3	60±3	60±3
Duro	180±20	180±20	160±20	180±20
Density(g/cm³)	1.45±0.05	1.45±0.05	1.5±0.05	1.55±0.05
Tensile (MPa)	≥4.5	≥4	≥4	≥4
Elongation(%)	≥270	≥230	≥180	≥300
Compression (%)	≤6	≤6	≤6	≤10
Tear (kN/m)	≥10	≥10	≥8	≥8
Rebound(%)	≥55	≥50	≥50	≥45
Flame Retardant	FV-0	FV-0	FV-1	FV-1
Breakdown (kV/mm)	≥22	≥20	≥15	≥15
Dielectric Constant	≤4.5	≤5	≤5	≤5
Volume Resistivity (Ω·cm)	≥1×10¹⁴	≥1×10¹⁴	≥1×10¹⁴	≥1×10¹⁴
Hydrophobicity	HC1	HC1	/	/

1. Electronic keys and covers: Designed for keypads requiring tactile precision and longevity in consumer electronics, automotive interfaces, and industrial controls.Kitchen utensils and food grade products LFGB certification makes it safe for kitchen utensils, food containers, and silicone molds.

2. Wearable accessories: Ideal for soft, hypoallergenic watchbands, wallets, and wearable tech components.

3. General industrial parts: Suitable for seals, gaskets, and flexible parts requiring high temperature and chemical resistance.

1. Formulation and curing: Mix with 1% of 50% doubled 25 curing agent. Vulcanize under 175°C ×5min ×15MPa.

2. Cooling and post-treatment: Cool gradually to retain flexibility and structural integrity. Post-curing optional for enhanced mechanical properties.

Q: Can this rubber be used for food-grade products?

A: Yes, LFGB certification ensures safety for food-contact applications like kitchenware and molds.

Q: What is the vulcanization time?

A: Only 5 minutes at 175°C under 15 MPa pressure, optimizing production speed.

Q: How customizable is the hardness?

A: Available in Shore A 20–80, enabling tailored solutions for soft wearables or rigid industrial parts.

Q: Does it resist high-temperature environments?

A: Yes, low compression set (≤10%) ensures stability even after prolonged exposure to 175°C.

Q: Is it suitable for outdoor use?

A: Excellent UV and weather resistance make it ideal for automotive and outdoor electronics.

WENZHOU HEFENG SILICONE RUBBER CO.,LTD

Fumed Silicone Rubber for Keypad Manufacturing

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