Liquid Silicone Rubber (LSR) - No Secondary Vulcanization
SiOResin YAC29 is a two-component, translucent addition-cure liquid silicone rubber (LSR). After cross-linking, no secondary vulcanization is required. Conventional silicone rubber requires secondary vulcanization (baking at 200°C for 4 hours) after the initial curing to pass LFGB and VOC tests. Our YAC29 series liquid silicone rubber ensures that the volatile organic compound (VOC) content (200°C/4hr) is controlled below 0.3% without secondary vulcanization, while also exhibiting excellent mechanical properties.
It is especially suitable for applications involving food contact, infant care, medical-grade silicone products, and thermal molding products.
No secondary vulcanization liquid silicone rubber (LSR) avoids contamination caused by secondary vulcanization; Reduces the risk of delamination, especially in overmolded products; Saves energy, is environmentally friendly, and minimizes the waste of human resources.
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Product Features
- No secondary vulcanization required.
- Low molecular content below 0.5%;
- Good transparency.
- Passed third-party tests such as the FDA, REACH, PAHS, PFOA, and CPSIA.
- Superior mechanical properties.
- Extremely low VOC content.
- Good anti-yellowing properties.
- Complies with ISO 10993 medical grade certification.
Product Specifications
| 2920A/B | 2930A/B | 2940A/B | 2950A/B | 2960A/B | 2970A/B | |
|---|---|---|---|---|---|---|
| Appearance | Transparent | Transparent | Transparent | Transparent | Transparent | Transparent |
| Hardness, Shore A | 20 | 30 | 40 | 50 | 60 | 70 |
| Specific Gravity (at 25℃), g/cm³ | 1.20 | 1.12 | 1.12 | 1.12 | 1.13 | 1.14 |
| Tear Strength, N/mm | 25 | 28 | 32 | 38 | 35 | 40 |
| Tensile Strength, MPa | 6.5 | 7.5 | 9.5 | 10.1 | 11.4 | 9 |
| Elongation, % | 850 | 600 | 550 | 500 | 450 | 420 |
| VOC% (EM-14350) | 0.2-0.3 | 0.2-0.3 | 0.2-0.3 | 0.2-0.3 | 0.2-0.3 | 0.2-0.3 |
Application Areas
Baby silicone bottles, pacifiers, masks, kitchen silicone products, diving masks, smart wearables, Medical Devices,food contact products, infant care products and other injection-molded silicone products.
Usage Instructions
* Mix components A and B through a static mixer at a ratio of 1:1, and inject the mixed material into the mold using an injection machine. The material must be full. (It can also be hand-stirred and then poured into the mold for compression molding).
* Recommended curing conditions: 125℃ for 3 minutes (thickness 2mm).
* Specific molding conditions can be determined through testing based on the thickness or size of the product.
Safety, Packaging, and Storage
1. Packaging Specifications: 20/200 kg per drum.
2. Storage: The product should be stored in a cool, ventilated place, avoiding direct sunlight, isolated from fire sources, and away from heat sources.
3. Transportation: During transportation, the product should be well sealed to prevent moisture, strong alkali, strong acid, and rainwater impurities from entering.
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