What is silica powder used for?
The use of precipitated silica is very wide, and different products have different uses. Used as a good reinforcing agent for synthetic rubber, its reinforcing performance after carbon black, if the ultra-fine and appropriate surface treatment, even better than carbon black. Especially in the manufacture of white, color and light-colored rubber products is more applicable. Used as thickening agent or thickener, synthetic oil, insulating paint blending agent, paint degreasing agent, electronic components encapsulation material thixotropic agent, phosphor screen coating phosphor deposition agent, color printing plate filling Agent, cast release agent. Add resin, can improve the resin moisture and insulation properties. Filled in the plastic products, can increase the anti-slip and anti-oil. Filled in the silicone resin, can be made resistant to more than 200 ℃ plastic. Used as a surface ingredient for fillers and paper in the paper industry.
Precipitated white carbon black (ordinary grade): products and rubber and various additives compatibility is excellent, good dispersion, white and black spots less impurities, suitable for a variety of soles, transmission belt, ordinary rubber parts, tires, etc.
Precipitated white carbon black (silicone rubber grade): This product is the manufacture of silicone rubber with ultra-fine white carbon masterbatch, and high ratio table and low ratio table two models, high specific surface area, used in high temperature vulcanized silicone rubber (Such as: key, transparent silicone rubber pieces, high and low temperature high pressure seals, etc.); low specific surface area, used in room temperature glue (such as: glass glue, sealant, etc.)
Precipitation method White carbon black (fire level): This product is suitable for fire, such as ABC and BC dry powder destroy agent, modified, to prevent sedimentation, agglomeration, pressure out better
Precipitation method White carbon black (rubber roller): The specific surface area of the product can be done 205 to 235, can be combined with the hardness of the roller products, to 90-95 Shore, is a variety of industrial roller (rice roller , Printing roller, transmission roller, special rubber roller, etc.) excellent filling reinforcement
Precipitation method White carbon black (pesticide grade): This product is used as a carrier of dry powder pesticide, and agricultural materials have a good compatibility, with a very small pore absorption of pesticide components, which can ensure a longer release of efficacy
Precipitated white carbon black (granular environment): This product is a granular environmentally friendly products, powder granulated granules through the granulation to prevent dust flying, used in the tire can be effectively dispersed, mainly for the meridian and industrial Load tires
Precipitated white carbon black is widely used in rubber reinforcement materials, in general, due to precipitation of white carbon (ultra-fine, surface treatment exception) reinforcement effect is not as good as carbon black, it is semi-reinforcing filler. Therefore, according to the use of the decision to replace the percentage of carbon black. Precipitated white carbon for rubber products, such as cars, dump trucks, trucks, tractors, forklifts, bicycles and other inner and outer tires, industrial belts, hoses, gaskets, plastic sheeting, grain processing, Rubber products are more or less to use white carbon black. Adding a certain amount of silica to an ordinary tire can improve the service life of the tire. According to the original West Germany tires formula research results show that if the increase of 10 to 20 parts of silica can improve the bonding and tear resistance, the tire mileage to improve, but also enhance the tire on the road Grasp the force, in order to facilitate safe driving. China's tire mileage is lower than the international level, do not use silica is one of the reasons. In addition, due to the large amount of carbon black heat, foreign cars for the highway tires tend to add white carbon black. At present domestic and foreign markets on the requirements of bicycle tires are increasingly diversified, such as tire tires color and flash ring and other fancy new varieties, are made of carbon black instead of carbon black. In the production of shoes, people shoes, boots, sports shoes, sneakers, fitness shoes, ballet shoes, not only requires fastness, but also requires beautiful colors, comfortable and lightweight. White carbon black has both good reinforcement, abrasion resistance, slip resistance and upper adhesive, but also a good light-colored reinforcement material, so the development of shoes in the shoe to provide the quality and style Important role.
White carbon in polyethylene, polypropylene, polybutene, epoxy resin can be used as a filler material, can improve the plastic's elastic strength and wear resistance, and hardness of the thermal stability. For the cable can also improve the electrical insulation of the cable, such as methyl vinyl silicone rubber high-voltage line will use gas-phase silica or high-quality precipitation of white carbon black. In the two layers of plastic film is often difficult to separate between the bag when the bag is difficult to open, then the white carbon is very open with the opening agent. When the PVC as a home flooring material, if the addition of a certain amount of white carbon, you can improve product hardness, flexibility, thermal denaturation and other properties.
White carbon black paper to do the glue, can improve the paper whiteness and opacity, improved printing, oil resistance, abrasion resistance, feel and gloss. For the drying paper, can make the paper surface quality, ink stability, no cracks on the back; for azide paper, can produce high quality blueprint paper; for copper paper can replace titanium white; especially for newsprint, adding 1 to 2% of the white carbon can reduce the weight of the paper by 10%, not only paper, but also improve the strength, in addition to prevent ink penetration, so that printed text clear, but also increase the opacity.
Silica has thixotropic properties, in the paint to add a small amount of silica, can make the coating to eliminate droplet sedimentation phenomenon. In unsaturated polyester coatings, as long as the addition of 0.5 to 2% concentration of white carbon, can make this coating on the vertical surface of each coating 500g / m2 will not occur droplets and wrinkles. The addition of silica to the pigment not only prevents the precipitation of the pigment, but also improves the adsorption of the pigment and the dye and improves the dispersibility. When used as a filler for emulsified coatings, thermal stability can be improved. In order to meet the coating and ink matting agent on the requirements of silica, foreign research and production of matting agent special products. When the nitro varnish and similar coatings contain precipitated silica extinction agent, can improve the paint non-precipitation performance, and can make the paint easy to disperse, only a small amount of thickening effect, good suspension, excellent extinction characteristics, high transparency And good wear resistance. In the printing ink by adding 0.5% of the silica, the printing effect is good, can eliminate the impact of undissolved ink penetration, improve the printing material washability, increase the color of the gloss.
In addition, white carbon black in pesticides, pharmaceuticals, adhesives, toothpaste and daily cosmetics also have a variety of different degrees of use and play a variety of useful features.