Factors rubber O-ring impact

Rubber O-ring material impact on the quality and efficiency of the split edge burrs thick hard hardness after the molding process inadvertently molding rubber O-ring tensile strength elongation will vary. We Factors rubber O-ring because of the attention to the impact.

First, the factors that affect the viscosity of the rubber O-ring. Science and Technology Glossary: ??liquid, intended liquid or solid material resistance to flow volume characteristics intended, namely when flows by external force, internal friction between molecules or presented within the flow resistance. Note that is proportional to viscosity and hardness normally.

Second, the factors that affect the hardness of the rubber O-ring. Ability of the material to resist local hard object pressed into its surface known as hardness. Silicone rubber O-ring has a Shore hardness of 10-80 range, which give designers full freedom to select the desired hardness in order to best achieve specific functions. On the polymeric substrate, a filler and additives can be mixed in different proportions to achieve a variety of intermediate hardness values. Similarly, the heat curing time and temperature also change the hardness, without damaging other physical characteristics.

Third, the impact factor rubber O-ring tensile strength. Tensile strength refers required on each range unit caused by a rubber material samples tear force. Heated solid organic sulfur-type silicone rubber tensile strength range between 4.0-12.5MPa. Fluorosilicone rubber tensile strength range between 8.7-12.1MPa. Tensile strength range between the liquid silicone rubber 3.6-11.0MPa.

Fourth, factors rubber O-ring tear strength. Cuts or nicks hinder the expansion of resistance when a force is applied on the notched samples. Even after cutting into extremely high torsional stress, heat and sulfur-type solid silicone rubber can not be torn. Sulfur-type heat-solid silicone rubber tear strength range between 9-55 kN / m. Fluorosilicone rubber tear strength range between 17.5-46.4 kN / m. Liquid silicone rubber tear strength range between 11.5-52 kN / m.

Five Factors rubber O-ring elongation. Usually refers to the "ultimate elongation at rupture" or when the rubber O-ring samples fracture percentage of the original length of the growing respect. Hot sulfur-type solid silicone rubber general elongation in the range of 90-1120%. Fluorosilicone rubber general elongation of between 159-699%. Liquid silicone rubber general elongation of between 220 to 900 percent. Choose different processing methods and a hardener can be widely varied its elongation. Silicone rubber O-ring temperature elongation and a great relationship.

Six factors rubber O-ring operating time. Operating time is counted from the colloidal vulcanizing agent at that moment. The operating time and curing time behind that fact is not fully boundaries colloid vulcanizing agent is added from the moment it has been vulcanization reaction, this means that the operation time of the vulcanization reaction product of 30 minutes may not affect the quality of the finished product. So during product operation to save more time on the finished product, the better.

Seven factors vulcanized rubber O-ring time. In some places will say that the curing time. That after such a long time vulcanized silicone reaction is essentially over. This basically means that the end product is already available, but in fact there is a very small part of the curing reaction is not over yet. So make use of silicone rubber products, such as silicone molds usually put some time and then put into use.

Specialty Products

Special rubber o-ring is based on the chemical properties of rubber or some add a secondary raw material, special rubber O-ring may also have a high temperature (up to 330 degrees), food grade (full compliance with US FDA, LFGB standard), medical grade , flame retardant by adding auxiliary materials can also have, luminous, negative ions, color, and other characteristics.

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Shenzhen Xu Xinhua Rubber Products Co., Ltd.