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Dongguan Mingzhen Rubber & Plastic Products Co., Ltd.

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Dongguan Minz Rubber & Plastics Co., Ltd.

Add.: No.4, New Industrial Road, Shipai Tangwei, shipai town, Dongguan City
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How long can the silicone seal ring be used on the equipment?

Release time:

2021-12-18 16:29

Source:

Dongguan Mingzhen

After silica gel adsorbs moisture, it can be removed by thermal desorption. There are many heating methods, such as electric heating furnace, flue waste heat heating and hot air drying. The temperature of desorption heating should be controlled at 120-180 ℃, and 100-120 ℃ should be controlled for blue indicator, color changing silica gel and blue silica gel.

The service life of silicone seals is usually affected by three factors: mechanical force, oxidation and ozonation. In general, the silicone seal ring becomes brittle and fatigue crack propagation accelerates. Lowering the critical fracture energy reduces its life. The factors that affect the life of the specific silicone seal ring are mainly as follows:

Aging will cause mechanical cracking reaction under the action of mechanical force: due to the viscosity of high molecular polymer, the relaxation process of rubber in the deformation cycle is too late to complete, and then enter the next deformation cycle, so that the internal deformation and residual stress of silicone rubber sealing ring are increasing. When the stress gradient is large, it will lead to the direct fracture of the rubber molecular chain to produce free radicals, and then cause the rubber's free radical oxidation chain reaction aging under the action of oxygen.

Silica gel regeneration should pay attention to the problem
The drying regeneration should pay attention to gradually increase the temperature, so as to avoid violent drying caused by the explosion of colloidal particles, reduce the recovery rate.
The silica gel roasting regeneration, the temperature is too high will cause changes in the pore structure of silica gel and significantly reduce its adsorption effect, affecting the use value. For blue indicator or color-changing silica gel, the temperature of desorption regeneration should not exceed 120 ℃, otherwise it will lose its color effect due to the gradual oxidation of the color developer.
The regenerated silica gel should generally be sieved to remove fine particles to make the particles uniform.


Silicone seal ring manufacturer customized

Aging will activate the oxidation cracking reaction of mechanical force: when the silicone seal ring is repeatedly deformed during the sealing process, its mechanical stress will weaken the valence force in the rubber molecular chain, thereby reducing the activation energy of its oxidation reaction. The reduction of the oxidative activation energy makes the oxidative cleavage reaction of the rubber molecular chain easier and faster.

Silicone sealing ring internal heating to accelerate the oxidation reaction: when the silicone sealing ring repeatedly deformation, will produce hysteresis, produce internal friction, resulting in internal heating rubber, further accelerate the oxidation of rubber chain reaction. Rubber and aging.

Ozone cracking of silicone seal ring: ozone cracking occurs during the periodic deformation of silicone seal ring. This phenomenon is more obvious under high temperature conditions.

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What is the difference between silicone plug and rubber plug

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What are the fields of application of silicone keys for equipment

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What are the molding techniques of rubber products?

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How to print the pattern on the transparent key

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