There are more than one thousand talc production and processing enterprises in China, but no more than 10 companies can produce fully qualified molecular compound plastic talcum powder. There are no more than 15 companies that can produce basic qualified products. At present, China's relatively strong production enterprises focus on the production of export products, seriously ignoring the growing domestic demand. A large part of the talc powder used in the domestic molecular compound plastics industry comes from small and medium-sized enterprises and informal enterprises. This makes product quality difficult to guarantee. At the same time, it is worth mentioning that the uncertainty of the origin of some talc powders used in scientific research in China is also very large, which makes the credibility of its research conclusions greatly reduced.
Talc has a significant reinforcing effect on molecular compound plastics, but not all talc products have a reinforcing effect. The enhancement effect is very different with the difference in product grade. It is difficult to propose uniform, specific standards for talc used in the molecular compound plastics industry. The general principle is: try to use pure talc products with appropriate particle size, the product does not need to be as fine as possible. In view of the diversity of talc mines, the best results are still required by the manufacturer's technical support. When selecting a product specifically, at least consider the "four degrees" of the talc itself, namely: purity, whiteness, fineness, and slice.
First, purity
Purity refers to the talc content of the product. Talc in nature and industrial production contain impurities, and 100% pure talc products in the industry are impossible. There is no doubt that the higher the purity of talc, the better the reinforcement. Studies have shown that certain impurity properties in talc not only reduce purity, but also have a significant impact on the performance of the final product.
Second, whiteness
The whiteness in the talc test is narrow and broad. The narrow whiteness is the general whiteness definition, which can be expressed by blue light whiteness, Ganz plastic characteristic whiteness, Hunter whiteness and the like. There are no more than one hundred formulas for calculating whiteness in the world, and the formulas often used in the non-metallic mineral light industry are no less than ten. Generalized whiteness includes dry whiteness, wet whiteness, and hue. For the same raw material, the finer the particle size, the higher the whiteness. The higher the moisture, the lower the whiteness. Although the degree of whiteness has no effect on the physical properties of the product, it is important to maintain the purity of the color for light-colored products.
Third, the slice
The remarkable reinforcing effect of talc on molecular compound plastic products is mainly due to its peculiar microscopic sheet structure. The more complete the flaky structure of talcum powder, the more obvious its reinforcing effect. The two main factors affecting the product sheet are: talc purity and the processing skills and skills of the powder.
Fourth, fineness
Micro-fineness is the development trend of talc products. The finer the product, the better the strengthening effect, but at the same time, the surface energy of the particles increases, it is easy to agglomerate, the separation is difficult, and the price is high. Therefore, it is necessary to select the appropriate fineness of the product according to its skill level and actual needs, and it is not necessary to be as fine as possible.
In general, to evaluate the pros and cons of a talc product, at least consider the above four factors. Judging the quality with only one indicator is one-sided and incomplete. If someone only judges the quality of talc products by average particle size, this is very debatable.
The category of Goyen Type Pulse Jet Valve.
1. Integral Pilot Pulse Valve: CA15T, CA20T, CA25T, CA35T, CA45T, CA50T, CA62T, CA76T, CA76MM, CA25DD, CA45DD, CAC25FS, CA45FS.
2. Remote Pilot Pulse Valve: RCA15T, RCA20T, RCA25T, RCA35T, RCA45T, RCA50T, RCA62T, RCA76T, RCA25DD, RCA45DD, RCAC25FS, RCA45FS, RCA3D0, RCA3D1, RCA3D2
3. Enclosure: 3-5V, 3-8V, 3-12V
Dust collector applications, in particular for reverse pulse jet filter cleaning and its variations, including bag filters, cartridge filters and envelope filters, ceramic filters and sintered metal fibre filters.
Goyen Pulse Jet Valve, Goyen Pulse Valve, Goyen Solenoid Valve, Goyen Diaphragm Valve
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