It can be harmful, the rubber accelerator (MBT) in rubber products may contain carcinogenic factors and health hazards.
MBT is found in a wide range of rubber products, including rubber gloves, condoms, medical catheters, car tires, swimming caps and goggles, baby pacifiers, elastic bands, and the surfaces of plastic runways.
The main material used in 3G pitches (third-generation synthetic grass pitches), which are now gaining popularity in the United Kingdom, is also shredded rubber. The latest reports indicate that pitch plastics contain high levels of mercury, lead, arsenic and other toxic chemicals that pose a significant threat to the health of players, especially goalkeepers.
Expanded InformationRubber Processing
This process includes the basic processes of plasticizing, mixing, calendering or extruding, molding and vulcanizing, each of which has different requirements for the product, respectively, with a number of auxiliary operations.
In order to be able to add a variety of required agents into the rubber, the raw rubber first needs to be plasticized to improve its plasticity; and then through the mixing of carbon black and a variety of rubber additives and rubber into a uniform mixture of rubber;
Rubber through the press out of a certain shape of the blanks; and then make it and the calendering of hanging or coated with rubber textile materials (or with metal materials) together with the molding for the semi-finished products; and finally After vulcanization and plastic semi-finished products into highly elastic final products.
The higher precision requirements of the products, oil seals, O-rings, seals and other rubber products, but also need to be trimmed, deburring processing, can choose the way of manual trimming, mechanical trimming and freezing trimming.
Manual trimming: labor-intensive, low efficiency, low pass rate.
Mechanical trimming: mainly punching and cutting, grinding wheel and round knife trimming, applicable to the precision requirements of the specific products are not high.
Frozen trimming: special frozen trimming machine equipment, the principle is to use liquid nitrogen (LN2) to make the finished product of the burrs in the low temperature becomes brittle, the use of specific frozen particles (projectile) to hit the burrs, in order to quickly remove the burrs. The efficiency of frozen trimming is high, the cost is low, and the applicable products are widely used, which has become the mainstream process standard.
Baidu Encyclopedia - Rubber
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