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NBR Rubber Products Contains A Higher Level

NBR Rubber Products The type and grade of raw materials of rubber products will affect the content of heavy metals. Therefore, care should be taken to avoid or reduce the use of raw materials containing chromium and nickel (such as zinc chrome yellow containing six chromium, NBR Rubber Products antioxidant NBC containing nickel). The chrome layer of the mould and skeleton will also bring the chromium element to the compound, so we should develop a new chrome plating technology with trivalent chromium instead of hexavalent chromium. Rubber footwear industry to pay attention to textile and leather dyes limit the heavy metals, limit the use of copper, NBR Rubber Products chromium, nickel metal complex dyes, to avoid China's shoes at the end of 2005 because of the detection of high levels of nickel and azo dyes and Italy was "toxic" investigation puzzle.

The content of heavy metals in rubber products is not only derived from one or two key raw materials, NBR Rubber Products but is the sum of heavy metal content of all raw materials (including rubber). Some raw materials, although heavy metal content is very micro (such as white carbon Black and kaolin), but also pay attention to "add up."

As the EU ELV directive and the Eee RoHS directive have been implemented, the formulation design and production process of rubber products to achieve "lead-free" has become an important subject.

The system of Vulcanizing agent Tcy ($number triazine) and Ca Mg acid-absorbing stabilizer a system consisting of a CABACO3 acid-absorbing agent, a vulcanizing agent XL-21 ($number)-Two thiol carbamate methyl quinoline) Cha (OH) 2 acid-absorbing agent, is the lead-free vulcanization system of chlorinated rubber, which has replaced the Na-22 or "two salts" of the lead sulfide system in the automotive fuel rubber hose. In addition, there are serious environmental problems in the vulcanization system of sulfonated polyethylene Rubber (CSM), NBR Rubber Products which can be replaced by a lead-free vulcanization system (such as pentaerythritol) or in the production of CSM with chlorinated polyethylene rubber (cm).

Replace the TPX resin (poly-methyl-isoprene), nylon, polypropylene or nylon/PP with the plastic wrap process. As far back as 1972, the carcinogenic nature of lead and lead compounds had been identified in volume 1th of the International Centre for Research on Cancer (IARC), and two directives of the EC (67 548 and 76 769 76) also classified lead and lead compounds into hazardous substances and set limits. At that time, NBR Rubber Products the European rubber tube production plant is about to abandon the pack lead unit, and precisely at this time, China's rubber tube industry set off the introduction of continuous lead-pack of the upsurge, successively from Europe to introduce a number of production lines, some production lines are still operating. At that time, the cable industry was also widely used, and a domestic lead-pack unit was developed. This is due to environmental awareness and the lack of information caused by decision-making errors, to be a cautionary tale.

Some rubber/metal hot vulcanization adhesives (such as the 220, 250, 252) contain lead compounds that lead to excess PB. The Cilbond 24C, which has been developed by the British Sibon, is a high-performance adhesive that complies with the international raw Material Information System (IMDS),NBR Rubber Products unleaded, non-toxic solvent type. Used for hot vulcanization bonding between various types of rubber and metals, plastics and other hard substrates.

In accordance with EU Directives, PBBs (PBB) and PBBs two phenyl ether (PBDE) are prohibited/restricted. Although it is difficult to find an effective flame retardant to replace 10 bromo two benzene ether in the rubber and plastics industry, the fire department also objected, and the European Commission decided on October 13, 2005 to exempt "10 Bromo two phenyl ether in polymer applications". NBR Rubber Products This seems to give the legal status of 10 Bromo two phenyl ether for the time being. However, some foreign electrical and electronic equipment manufacturers still insist on the "one bromine" to "ten bromine" diphenyl ether banned/restricted. There are two reasons: the directive Eu-d-2003, which is limited to two phenyl ether and two phenyl ether, is still in effect and they are not exempt, and in the synthesis of two phenyl ether, there are 2% byproducts-eight Bromo two phenyl ether and nine Bromo two phenyl ether.