Rubber Chem Encyclopedia

Application of active calcium carbonate in reclaimed rubber

Create Date:2021-08-11 11:31:55Click volume:3134
Application of active calcium carbonate in reclaimed rubber

Activated calcium carbonate is a calcium carbonate product prepared by surface activation treatment of heavy calcium or light calcium. Compared with ordinary calcium carbonate, the remarkable feature of activated calcium carbonate coated with organic active agent is its strong hydrophobicity and better compatibility with rubber. When using reclaimed rubber to produce high-performance, low-cost rubber products, activated calcium carbonate is more widely used. So what are the functions of activated calcium carbonate in the production of reclaimed rubber products? Which reclaimed rubber products will use activated calcium carbonate?

1. The role of activated calcium carbonate in reclaimed rubber

In the actual application process,  which can make the reclaimed rubber easy to mix and disperse; it can play a multiple role in reinforcing, filling and coloring in the rubber; improving Processing performance, improve the extensibility, tensile strength and tear strength of recycled rubber 2YLYY811 products. When using reclaimed rubber to produce light-colored rubber products, the addition of activated calcium carbonate can also reduce the rubber content, replace part of the expensive white fillers such as titanium dioxide and white carbon black, and reduce more raw material costs.

2. Application of active calcium in rubber products

Car tires, tires, hoses, tapes, oil seals, auto parts and other rubber products can be filled with a large amount of activated calcium carbonate during the production process. For example, when natural rubber and butadiene rubber are used together to produce tire tread rubber, about 60 parts of active calcium carbonate can be filled, and the amount of active calcium carbonate in the inner tube rubber can be increased to 100 parts; the rubber roller can be filled with about 80 parts of active calcium. Rubber shoes can be filled with about 100 parts of active calcium carbonate, and so on.

3. Specific application of activated calcium carbonate in reclaimed rubber

When using reclaimed rubber to produce rubber products, the appropriate use of activated calcium carbonate can not only reduce more raw material costs, but also further improve the process performance of the rubber. It is used in tires, rubber sheets, tapes, rubber shoes, rubber gaskets, seals, and electrical insulation products. It is widely used in other products. It should be noted that activated calcium carbonate will also play a role in accelerating the rate of rubber vulcanization, because manufacturers of reclaimed rubber products need to adjust the vulcanization system in the formula appropriately.

Black power plug produced by styrene-butadiene rubber/reclaimed rubber: 100 parts of styrene-butadiene rubber, 25 parts of recycled rubber, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant D, 80 parts of clay, 10 parts of talcum powder, activated carbonic acid Calcium 50 parts, Lithopone 5 parts, Coumarone 35 parts, Accelerator M 2 parts, Accelerator TMTD 0.6 parts, Accelerator D 1.5 parts, Sulfur 2.3 parts; Total: 318.4 parts.

Activated calcium carbonate is used in the production of many reclaimed rubber products, and the editor will continue to discuss related issues with you later.

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