In life, many people must have seen the phenomenon that rubber products will turn white after use for a period of time, for example, when the humidity is high, the paint is easy to turn white.
Oil injection is a kind of oil-like substance composed of softener, tackifier, lubricant, plasticizer and other liquid complexing agents on the surface of rubber. In practice, the way of spraying frost on the rubber surface is sometimes presented in one way, sometimes in two or three ways together.
(1) improper formulation planning:
Full spray: common in sulfur, accelerant, activator, antioxidant removal spray: common in processing aids, mobile antioxidant. Generation and ejection of antistatic agent: it is commonly used in the sulfur curing system as accelerator and reverberant product to reverberate: it is commonly used in the excessive stress ejection of low molecular substances in the organic peroxide curing system; it is commonly used in the inorganic filler, such as calcium carbonate.
(2) improper technical operation
(3) the quality of raw materials fluctuates because of the differences in raw materials, manufacturing methods, technologies and batches
(4) storage condition difference temperature: the solubility of admixture in rubber usually rises and falls with the rise and fall of temperature
(5) the aging of rubber mostly causes damage to the well-balanced network structure of vulcanizate, and then damages the chemical or physical connection between various compounding agents, raw rubber molecules and compounding agents in the rubber system, reducing the solubility of compounding agents in the rubber system. As a result, those parts in the over full state of the admixture will be separated from the rubber, forming a spray cream.
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