DONGGUAN XINRUN SILICONE NEW MATERIALS LIMITED
GLOBAL LEADING MANUFACTURER OF MOLDMAKING CASTING MATERIALS FOR MORE THAN 10 YEARS
Hotline: 0086-0769-89600400 Email: info@xrsil.com Skype: info@xrsil.com
GLOBAL LEADING MANUFACTURER OF MOLDMAKING CASTING MATERIALS FOR MORE THAN 10 YEARS
Hotline: 0086-0769-89600400 Email: info@xrsil.com Skype: info@xrsil.com
| Brand Name : | XRSIL |
| Product Origin : | Dongguan, China |
| Delivery Time : | 3-5 days |
| Supply Ability : | 4 tons per day |
Liquid Urethane Mold Rubber XRPU rubber is developed to make molds for casting stamp concrete products. This item is well suited for use as a rubber case mold, especially large case molds where extra rigidity is required. Its hardness from 70-90 shore A features with a convenient mix ratio (1:1 by weight) and contains no mercury.
TECHNICAL OVERVIEW
| Item No. | XRPU-70 | XRPU-80 | XRPU-90 |
| Mix ratio | 1:1 | 1:1 | 1:1 |
| Part A color | Yellow | Yellow | Yellow |
| Part B color | Clear | Clear | Clear |
| Pour time (mins) | 5-6 | 5-6 | 4-5 |
| Demoud time (hrs) | 3-4 | 3-4 | 3-4 |
| Full cure (hrs) | 24 | 24 | 24 |
| Density (g/cm3) | 1.05 | 1.05 | 1.03 |
| Mixed viscosity (cps) | 1500±300 | 1500±300 | 1500±300 |
| Hardness (shore A) | 70 | 80 | 90 |
| Tensile strength (Mpa) | 7.2 | 8 | 8.6 |
| Elongation (%) | 580 | 580 | 600 |
| Shrinkage | N/A | N/A | N/A |
| Tear strength (N/mm) | 43.5 | 43.5 | 43.5 |
POURING CURING & PERFORMANCE
Pouring
For best results, pour your mixture in a single spot at the lowest point of the containment field. Let the rubber seek its level up and over the model. A uniform flow will help minimize entrapped air. The liquid rubber should level off at least 1/2” (1.3 cm) over the highest point of the model surface.
Curing
Allow rubber to cure overnight (at least 16 hours) at room temperature (23°C) before demolding. Cure time can be reduced with mild heat. Do not cure rubber where temperature is less than 18°C.
Post Curing
Generally rubber cures at room temperature; it can also heat curing. Heat the rubber under temperature about 120°C, rubber can be cured within one hour.
Using the Mold
If using as a mold material, a release agent should be applied to the mold before each casting. The type of release agent to use depends on the material being cast.
Prior to casting gypsum plaster materials, sponge the mold with a soap solution for better plaster flow and easy release.
Performance & Storage
Fully cured rubber is tough, durable and will perform if properly used and stored. The physical life of the rubber depends on how you use it.