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The viscosity,. Technical glossary: liquid, quasi liquid or quasi volume flow characteristics of antisolid material, namely by external force flow, internal friction or flow resistance of molecules.Under normal circumstances is proportional to the viscosity and hardness.
Two, hardness. Local material resist hard pressed into the surface is called hardness. Silicone rubber has a shore hardness range of 10 to 80, which give designers the freedom to choose the required hardness, to achieve a specific function to best. To achieve a variety of middlehardness mixed in different proportions of polymer base material, filler and additives can.Similarly, heating time and temperature can also change the hardness, and will not damage thephysical characteristics of the other.
Three, the tensile strength. The tensile strength is caused by a piece of rubber material sampletorn each range of units required to force. The heat between the sulfur type solid silicone rubbertensile strength range 4.0-12.5MPa. Between fluorosilicone rubber tensile strength range 8.7-12.1MPa. Tensile strength range 3.6-11.0MPa liquid silicone rubber.
Four, tear strength. Hinder the incision or Nick's resistance force to expand in the sample on theincision. Even after the incision under high torsional stress, heat vulcanized solid silicone rubbercan also be torn. The heat between the sulfur type solid silicone rubber tear strength range 9-55kN/m. Between fluorosilicone rubber tear strength range 17.5-46.4 kN/m. Between the liquidsilicone rubber tear strength range 11.5-52 kN/m.
Five, elongation. Usually refers to the "ultimate rupture elongation" or when the sample breaksthe percentage of increase relative to the original length. Heat vulcanized silicone rubber solidgeneral elongation in the range of 90 to 1120%. Fluorosilicone Rubber General elongation at 159 to 699%. Liquid silicone rubber general elongation at 220 to 900%. The processing method and the choice of different curing agent can significantly change the elongation. Silicone rubber elongation and temperature have a great relationship.
Six, operation time. The operation time from colloidal add vulcanizing agent the momentcalculation. The operation time and the curing time is not completely behind the boundaries,from colloidal add vulcanizing agent at the moment have been vulcanization reaction, theoperation time is 30 minutes of the vulcanization reaction products can not affect the quality of the finished products. So the product operation process is more favorable for saving time andfinished products.
Seven, the vulcanization time. Some will say is the curing time. It is said that after such a longtime vulcanization silicone basically ended. The end of this basically is that the product is already available, but in fact there is a small part of the curing reaction is not over. So the use of silicone rubber products such as silicone mold making, usually put a period of time and then put into use.