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Frosting phenomenon during rubber processing

🕙 2023-09-12 👆

The phenomenon of frost spraying during rubber processing is caused by the decrease in solubility of the compounding agent in the rubber, or the precipitation and migration of the internal distribution agent to the rubber surface due to issues such as sulfur deficiency, aging, uneven stress, and uneven mixing.

Frosting can occur at various stages of rubber processing. According to different reasons, the phenomenon of frost spraying can be divided into powder spraying, wax spraying, and oil spraying. For example, powder spraying is caused by the precipitation of powder like additives such as vulcanizing agents, accelerators, activators, antioxidants, fillers, etc. on the surface of rubber to form a layer of powder like substance; Wax spraying is the formation of a wax film on the surface of rubber due to the precipitation of wax like substances such as paraffin and floor wax; Oil injection is caused by the precipitation of liquid additives such as softeners, tackifiers, lubricants, plasticizers, etc. on the surface of rubber to form an oily substance.

Different solutions can be taken based on the specific causes of frost spraying. For example, if it is due to excessive mixing, the dosage and formula of the mixing agent can be improved; If it is due to sulfur deficiency, the vulcanization process can be improved and the formula vulcanization system can be strengthened; If it is due to temperature changes, the content of the compounding agent can be appropriately reduced in a high-temperature environment; If it is due to aging, the aging process can be improved.

In addition, rubber frosting agents can also be used to treat frosting during the processing.

Frosting phenomenon is one of the common problems in rubber processing, and corresponding solutions need to be taken based on specific reasons.

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Frosting phenomenon during rubber processing