High Tear Strength Liquid Silicone Rubber For Durable Casting And Demolding Cycles
Description of Tin Cure Silicone Rubber
HN-620 consists of two components, A and B. To ensure that the physical properties of the material reach their optimal level after curing, it is essential to strictly adhere to a mixing ratio of 100:2 by weight during operation (i.e., 100 grams of Component A to 2 grams of Component B). It is recommended to use an electronic scale for precise measurement during the mixing process and to stir thoroughly until the mixture achieves a uniform color, thereby preventing issues such as localized incomplete curing or inconsistent hardness caused by inadequate mixing.
Application of Tin Cure Silicone Rubber
Architectural Decoration: Mold fabrication for large-scale stonework, gypsum components, cement elements, cultured stone, Roman columns, and carved stone furniture.
Arts & Crafts: Sculptures of lifelike animals and plants, resin crafts, Poly-resin ornaments, carved Buddhist figures, and various gypsum decorative items.
Technical parameter of Tin Cure Silicone Rubber
| Model |
HN-620AB |
| Feature |
low viscosity |
| Viscosity (cs) |
170000 |
| Gravity ( G/cm 3 ) |
1.06 |
| Hardness(A°) |
20 |
| Strength( MPa) |
3.1-3.6 |
| Tear Strength (kN/m ) |
19.8-24.3 |
| Elongation(%) |
600-720 |
| Linear Shrinkage(%) |
≤0.2 |
| Curing Agent Addition Ratio(%) |
2-3% |
| Operating Time( mins ) |
30-40 |
| Curing Time( hours ) |
3-4 |
Feature of Tin Cure Silicone Rubber
1. Two-Component System: Flexible Mixing Ratio, Stable Curing. HN-620 A/B utilizes the classic AB two-component RTV-2 (Room Temperature Vulcanization) system.
- Component Composition: Component A consists of a high-performance liquid silicone rubber base, while Component B serves as a specialized curing agent.
- Convenient Operation: Typically mixed at a ratio of 100:2, users can flexibly control the working time and curing speed by slightly adjusting the amount of curing agent used, depending on the ambient temperature and humidity.
- Room-Temperature Curing: The material achieves full curing at ambient temperature without the need for heating equipment, thereby significantly reducing energy consumption and equipment costs associated with mold making.
2. Exceptional Physical Properties: Superior Flow and Hassle-Free Casting—An Optimized Solution Designed for Large and Complex Molds:
- Excellent Fluidity: The liquid silicone exhibits a flow-like spreading capability, rapidly penetrating and encapsulating every minute detail on the model's surface to ensure that the resulting mold reproduction features crisp, distinct textures.
- Self-Degassing Performance: Its outstanding de-aeration capability allows bubbles generated during mixing to quickly rise and dissipate; even without the use of vacuum equipment, its inherently low viscosity ensures effective, ideal bubble elimination.
- Ease of Application:Whether utilizing brush-on or pour-on molding techniques, the material facilitates effortless, large-scale casting, thereby significantly boosting production efficiency.
3. Industrial-Grade Durability: Featuring robust weather resistance and dimensional stability, this material offers physical and chemical defenses specifically engineered for demanding production environments:
- High/Low Temperature Resistance: Once cured, the mold exhibits exceptional thermal stability, capable of withstanding prolonged exposure to high-temperature casting processes without becoming brittle.
- Acid and Alkali Resistance: Designed to withstand highly alkaline or acidic production materials—such as cement, gypsum, and artificial stone—the silicone's stable molecular structure resists chemical degradation, corrosion, and swelling.
- Ultra-Low Shrinkage Rate: Boasting an extremely low linear shrinkage rate, it ensures dimensional consistency for large-scale architectural components (such as Roman columns and monumental sculptures) across multiple reproductions, thereby preventing mold distortion.
MethodofApplication:
1. Mixing Ratio and Procedure: Before use, please shake Component B (the curing agent) thoroughly. Weigh the components strictly according to a weight ratio of A:B = 100:2. During mixing, pay particular attention to scraping the bottom and side walls of the container to ensure the silicone and curing agent are thoroughly blended. Note: Incomplete mixing will directly result in localized uncured areas within the mold, significantly reducing the mold's service life.
2. Vacuum Degassing:Place the thoroughly mixed silicone mixture into a vacuum chamber to remove air bubbles. The vacuum treatment duration should not be excessive; it is generally recommended to limit the process to within 10 minutes to prevent over-vacuuming from compromising the material's performance.
3. Curing and Maturation: This product utilizes a room-temperature curing system; the mold will fully cure within 4 hours at ambient temperature. Direct high-temperature heating to accelerate curing is strictly prohibited; if accelerated curing is required, the ambient temperature should not exceed 100°C. To achieve optimal physical properties, it is strongly recommended to allow the mold to rest for 24 hours after curing before putting it into production for casting.
پیام شما باید بین 20 تا 3000 کاراکتر باشد!
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