Mold Making Silicone Rubber World……

 As we all know, rtv-2 silicone rubber includes addition silicone rubber and condensation silicone rubber. The performance of these two types of silicone rubber is different. Below we introduce the difference between addition silicone and condensation silicone rubber from the composition and use. Difference in composition Addition silicone rubber, also known as platinum-cured silicone, is a non-toxic and odorless RTV-2 silicone. The ratio of part A to part B is 1:1 or 10:1. It does not produce small molecules during the reaction and has low shrinkage. . The color is semi-transparent or transparent. Condensed silicone rubber is also called tin-cured silicone rubber. It is composed of part A silica gel and part B tin curing agent. The ratio is 100:2-100:4. The base color is white or translucent. Other colors can be adjusted with pigments and added to form silica gel. In comparison, a little odor and small molecules are generated during the reaction. Usage differences Addition molding sil

In the process of making a silicone mold, bubbles in the liquid silicone may affect the appearance of the mold. If there is no vacuum pump, you may be confused about the handling of air bubbles. The following teaches you effective ways to reduce silica gel without a vacuum pump. First of all, we need to know why bubbles are generated. The first case is that the bubbles are not completely released when the silicone and curing agent are mixed. So you need to stir the liquid in one direction, and then let it sit for a while to let the bubbles float by themselves. The second case is that the raw material of silica gel contains some volatile impurities. When heating and curing, the impurities may vaporize and produce bubbles. Therefore, it is recommended to cure at room temperature or dry at low temperature to volatilize impurities. Secondly, when pouring silica gel, it is best to let it flow like a filament, so as to reduce bubbles. After pouring, use a toothpick to break the bubbles on th

 Electronic potting silicone rubber can make effect in electrical equipment product and it’s function of adhesive,potting and sealing can meet the electrical equipment waterproof, insulation and flame retardant demands. Now,in the market,the most application in electrical equipment is electronic potting silicone rubber and epoxy resin sealant,in order to let you have a more clearly knowledge,please check the below difference of this two item: Difference silicone potting compounds Epoxy resin sealant Cured hardness Elasticity Hard Glue adhesion Medial Good Smell No Yes Temperature Stable resistant at high temperature -50～250℃ Poor resistant at high temperature -50～150℃ Curing time Adjusting Adjusting Weather resistance Excellent Poor Shrinkage Almost to zero Large shrinkage Thermal conductivity[w/(m·k)] Good performance and fast heat,up 0.6 to 0.8 Poor performance,about 0.3 to 0.5 Restoratio Can repair without no trace Beyond repai

When we use liquid silicone rubber to make a silicone mold,we may find that the silicone rubber have not cured or not cured completely after 48 hours.What are the causes of this? In the experience of  liquid silicone rubber factory,there are 5 possible reasons that generate the silicone not cured or cured not completely. Reason 1: Too much or too much curing agent can be influence silicone to cure. Resolution:Add curing agent due to prescribed ratio,and please note instruction that the mixing ratio is by volume or by weight. Reason 2 : Different types of curing agents can not be mixed, addition silicone will not cure if it contact the tin composition in condensation silicone. Resolution:Use the corresponding types of curing agent and the tools are not mixed. Never contact the condensation silicone product when you are using the addition silicone rubber. Reason 3: Silicone and curing agent are uneven mixing. Resolution:Silicone and curing agent should stir evenly,especial in the bottom