Translucent Platinum Cure Liquid Silicone Rubber Molds Casting Food Grade
Product description
MCPLA-L10 A/B silicone rubber is platinum cure silicone rubber (or called addition cure silicone rubber). It is two-components silicone rubber, it will be cured under room temperarure and can be cured fastly by heating. The product is colorless or skin-colored liquid and becomes soft elastic material after vulcanization.With platinum cured, it is environmental friendly, skin safe, odorless and nontoxic. Also, it have soft hardness and excellent tension and tear strength and resilience.
Features
- totally non-toxic, odorless, harmless, and eco-friendly
- Translucent color, skin color
- High elasticity; good tensile strength and tear strength
- Low shrinkage less than 0.1%
- Good flexibility, permeability and easy operation
- Excellent UV-irradiation resistance and aging resistance
Applications
Life casting, Prosthesis Hands, Molding applications requiring low shrinkage e.g., jewelry, automotive, plaster, cement, cake decorations, etc.
Technical Properties
| Item No. | MCPLA-L10A/B |
| Appearance | Viscous liquid |
| Color | Translucent/skin tone |
| Viscosity ( cps,approx.) | 6000-7000 |
| Mix ratio (A:B) | 1:1 |
| Working time(at 25℃ ,minutes) | 30-40 |
| Curing time(at 25℃,hrs,approx.) | 6 |
| Hardness Shore A(after 24 h) | 10 |
| Tensile Strength(Mpa,after 24 h) | 3.6 |
| Elongation(%) | 600 |
| Tear Strength(N/mm) | 16 |
| Linear Shrinkage (%) | 0.1 |
Processing and Instructions of Addition Cure Silicones
1. Mixing the two components
According the mixing ration 10:1 or 1:1 weighting A and B, the two components may be thoroughly mixed either by hand or using a low-speed electric to minimize the degassing of bubbles and to avoid any temperature increase. Note: It is also possible to use a special mixing and dispensing machine for the silicone components, further information is available upon request.
2. Moulding
The mixture should be degassed preferably at 30 to 50 mbar to eliminate any entrapped air. If a dispensing machine is used, the two components are degassed separately prior to mixing. The silicone mixture expands to 3-4 times of its initial volume and bubbles rise to the surface. The bubbles progressively disappear and the mixture returns to its initial volume after 5 to 10 minutes. Wait a few minutes to complete the degassing and then flash the vacuum. The silicone is ready for pouring, either by gravity or under low pressure.
Note: Flashing the vacuum once or twice accelerates the degassing. It is recommended to use a container with a high diameter/height ratio (3 to 4 times of the initial volume)
3. Polymerisation
The curing may be slowed down at lower temperature or accelerated by applying heat.
Note:
Contamination from sulfur (e.g., sulfur-based clay), amines, tin compounds, cured polyester resin, some paints and some silicone rubbers may inhibit surface cure of platinum-cured rubbers.
Apply a release agent, Although not usually necessary, a release agent will make demolding easier when casting into most surfaces.
Packaging
20kg per drum, 200kg per drum
Storage and shelf life
MC Silicone MCPLA -H Series should be used within 12 months from the manufacturing date. Beyond this date, MC silicone no longer guarantees the products confirms with the sales Specification. In order to preserve best properties it is recommended to follow strictly the following guild lines:
Store the original packing tightly sealed and at a temperature below 30 degree Celsius.
Use the product as soon as the packaging has been opened.
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