(I)Transparent powder has the following significant characteristics compared to traditional fillers:
1.High transparency:Because the refractive index of transparent powder itself is very close to that of most synthetic resins, the high filling amount of transparent powder basically does not affect the transparency of the finished product. Good oiliness, made of itRubber and other products have good transparency,Compared with traditional transparent filling materials such as talcum powder, it has obviously better hue;
2.High hardness and gloss:Because of its low oil absorption rate and high density, it can improve the surface gloss, hardness and abrasion resistance of the product. At the same time, it also partially affects the sanding performance of the product;
3.Low oil absorption:The oil absorption is low, and the addition amount will not significantly increase the viscosity of the product, so it can be made into a high solid and low viscosity coating. Compared with other products with the same oil absorption, its sedimentation is obviously better than other products, which can improve the appearance of the product;
4.good collapse resistance:This product has good filling, hardness is slightly higher than talcum powder, deformation, shrinkage is small, adding paint and other products with high filling, anti-collapse function, even for coarse wood grain substrate also has a better filling effect;
5.Good dispersion:Uniform particle size, good fineness, for all kinds of resin,RubberWith good wetting, compatibility, no sanding, roller mill, ordinary high-speed disperser high-speed (1200-1500r/min) dispersion of about 10-18 minutes to achieve the required fineness;
6.Strong stability:This product is an inert material with strong acid and alkali corrosion resistance, high temperature resistance, strong flame retardancy and other advantages. It will not react with various resins, additives and solvents, and has good storage stability. Due to the special treatment, there is very little dust in the process of use, which is more environmentally friendly, more hygienic and safer than the traditional transparent filling material.
Some Problems in the Use of (II)
1.For water containing chemical structures (I. e.crystal water) products, please do not use in related products that require high temperature baking during construction (suchHigh temperature resistanceetc.), glass-type transparent powder in the application is not subject to this restriction, and has insulation, high temperature resistance and other characteristics.
2.Due to transparent powder (especially glass-type transparent powder)High hardness and smoothness will cause high hardness and low elasticity of rubberIt is necessary to adjust the formulation system, adjust the amount of coupling agent and speed increasing agent, and appropriately increase the gum content.
3.Transparent powder has low oil absorption and relatively large addition amount. In the rubber system, compared with resin, talc, stearic acid, carbon black and other raw materials, the proportion of transparent powder is relatively large, because of itsThe specific gravity is larger than carbon black and the oil absorption value is low, so the hardness changes slowly.It is required to make appropriate adjustments to the formulation system to meet the market requirements for the physical and chemical properties of the product.
4.Transparent powder containing crystal water is easy to lose water and absorb moisture, so its packaging must be moisture-proof and stored in a cool and dry place. The requirements for products in the storage and transportation process are also relatively high.