Chenguang Fluoro & Silicone Polymer Co.,Ltd
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Vacuum Interrupter Potting Silicone Rubber
4Mpa Low Viscosity R627 Vacuum Interrupter Potting Silicone Rubber
DESCRIPTION
Characteristics:
This material boasts exceptional moisture-proof and aging-resistant properties, making it an excellent insulator. Additionally, it has a low viscosity and excellent fluidity, allowing for easy application. It also provides strong adhesion to substrates when used with a matched primer.
Typical Properties
| Properties | Test Method | Unit | R-627 | ||
| Uncured | Appearance | Visual | A | Translucent | |
| B | Transparent | ||||
| Viscosity, after stirred at 23°C | GB/T 2794-1995 | Pa.s | 40 | ||
| Mixing ratio | A:B | 10:1 | |||
| Pot life, 25°C | h | 6 | |||
| Cured | Tensile strength | GB/T 528-2009 | MPa | 4.0 | |
| Elongation at break | GB/T 528-2009 | % | 300 | ||
| Tear strength | GB/T 529-2008 | kN/m | 10 | ||
| Hardness, Shore A | GB/T 531-1999 | 35±5 | |||
| Dielectric strength | GB/T 1408.1-2006 | MV/m | 18 | ||
| Volume resistivity | GB/T 1410-2006 | Ω.cm | 1.0×1014 | ||
These figures are only intended as a guide and should not be used in preparing specifications.
How to Use
The weight mixing ratio for this material is 10:1. Both Group A and Group B components are supplied from the machine's attached storage section and are mixed through a static mixer before being injected into the mold. The pot life of the material is 8 hours at 25℃ after being mixed, but higher temperatures may reduce it.
When using manual or semi-mechanical methods, it is recommended to use specialized equipment such as a small planetary mixer for complete mixing. Be careful when stirring manually and avoid scratching the bottom and walls of the container. To ensure that there are no air bubbles in the cured rubber, place the mixture in a vacuum degassing tank along with its container. The mixture will automatically break bubbles to collapse and rise to 3-4 times higher than the original location. Keep the vacuum status for at least 4-6 minutes before releasing.
If the injection molding equipment will not be used for an extended period, clean any remaining rubber promptly or store them in sealed packaging at low temperatures (-10℃ at least).
Curing Conditions
Heat acceleration can be used for vulcanization. The curing time is dependent on the size of the mold.
For larger molds, it's important to take into account the necessary time for thermal conduction. Additionally, the cooling and demolding time will vary based on the size of the article as well as the curing temperature.
Packing, Storage & Shipping
Compatibility
Certain materials, chemicals, curing agents and plasticizers can inhibit the cure of product. Most notable of these include:
If a substrate or material is questionable with respect to potentially causing inhibition of cure, it is recommended that a small scale compatibility test be run to ascertain suitability in a given application. The presence of liquid or uncured product at the interface between the questionable substrate and the cured gel indicates incompatibility and inhibition of cure.
As components of group A and group B have been confirmed without toxic and aggressive substances over past years, no need special preventive measure, only requests to use the general industrial health standard.
It should avoid contacting with nitrogen, phosphorus, sulfur compound and organic tin or other heavy metal compound because of being easy to be inactivated. The containers should be keeping clean.
Temperature will impact pot life of mixed rubber, the higher temperature, the shorter pot life.
The information provided in this leaflet reflects our current knowledge, but it's important for the user to carefully inspect all supplies upon receipt. We reserve the right to modify product specifications as technical progress or new developments permit. As we have no control over processing conditions, especially when other companies' raw materials are used, it is advisable to conduct preliminary trials to validate the recommendations provided in this leaflet. These recommendations do not relieve the user from the responsibility of investigating potential infringement of third-party rights or clarifying their position where necessary. The recommendations provided do not imply any warranty, either express or implied, regarding the suitability or fitness of the products for a specific purpose.
