Preparation method of anti-static silicone rubber O-shaped ring

Abstract

The invention provides a preparation method of an anti-static silicone rubber O-shaped ring. The method sequentially comprises the following steps: S1, mixing, namely adding 100 parts by mass of methyl vinyl silicone rubber, 3-10 parts by mass of conductive carbon black, 10-15 parts by mass of wear-resistant carbon black, 5-8 parts by mass of iron oxide powder and 2-4 parts by mass of antistatic non-woven fabric fragments into an internal mixer, and mixing for 30 minutes at the temperature of 50-80 DEG C to obtain a rubber compound; and s2, performing forming vulcanization. Two conductive fillers of the conductive carbon black and the iron oxide powder are added into raw materials of a traditional silicone rubber O-shaped ring; and the filling amount of the filler reaches a threshold value, and the volume resistivity and the surface resistivity of the polymer are rapidly reduced, so that the O-shaped ring can simultaneously depend on volume conduction and surface conduction to carry out electrostatic dissipation, and an anti-static effect is achieved.

Description

technical field [0001] The invention relates to the technical field of sealing ring preparation, in particular to a method for preparing an antistatic silicone rubber O-ring. Background technique [0002] In daily life and work places, if there is a large amount of static electricity, it will bring harm to life and work. In some places where high-end precision instruments are used, static electricity will affect the sensitivity of the instrument, resulting in errors in test results; in addition, the existence of static electricity in the workshop will cause a large number of dust particles in the air to be adsorbed to the surface of objects, thus affecting the quality of products . The electric shock caused by static electricity not only brings discomfort, but also may lead to more serious accidents due to people's evasive reaction after suffering the electric shock. When the operation is carried out in an environment of flammable and explosive dangerous goods, a certain a...

AI Technical Summary

Problems solved by technology

If these static electricity are not eliminated, it will have adverse effects on personal safety or product quality and safety

[0003] Silicone rubber O-rings are widely used in the sealing of pistons in reciprocating hydraulic cylinders. Therefore, antistatic agents are often added during the preparation of silicone rubber O-rings to achieve the anti-static function of O-rings. However, the O-rings prepared by this method The conductivity of the O-ring gradually weakens after being used for a period of time, and there is a hidden danger of deflagration caused by static electricity

[0004] Aiming at the problem that the antistatic performance life of the silicone rubber O-ring is not long in the prior art, the present invention proposes a new solution