Application of talcum powder in engineering plastics
Talc powder is a white, flaky, high aspect ratio, inorganic and inert natural mineral. It is widely used in PP, PA, PC/ABS alloy, PBT, LCP and other engineering plastics. It has similar calcium carbonate filling cost reduction And near glass fiber reinforced dual function. Talc powder has the ability to increase the HDT temperature of products, the flexural modulus of thin-walled products, and reduce the coefficient of linear expansion CLTE, etc. It is widely used in industries such as automobiles, home appliances, and food containers.
The crystalline structure of talc is layered, which tends to be easily split into scales, and has special properties such as lubricity, anti-sticking, flow aid, non-absorbent, and chemical inertness. Ultra-fine talc powder is processed from natural minerals through multiple processes such as mining, rough selection, fine selection, crushing, coarse grinding, airflow grinding, etc. The key factor for high-quality talc powder products is to retain the flaky structure of talc powder to the highest degree .
1) Ultrafine talc powder filled products have high flexural modulus and are suitable for high rigid parts.
2) Filling modification has better dimensional stability, better aspect ratio control ability, and anti-warping performance is obviously better than glass fiber.
3) Talc micropowder can be used as an inorganic nucleating agent, assisting with an organic nucleating agent to achieve a nucleating effect and increase the HDT temperature.
4) Comply with the requirements of FDA, ROHS and other regulations, and meet the limit that talcum powder does not contain asbestos (the International Cancer Research Center IARC lists “asbestos-containing talc” as a carcinogen)
Application of talcum powder in TPO
Under the same experimental conditions, change the type of EPDM/POE, the content of the toughening agent, and select talc powder products of different thicknesses to evaluate the complete strength of the modified TPO, the notched impact strength at room temperature and low temperature, and HDT temperature and The performance of the linear shrinkage of the material. The following is the particle size index of Yimifabi talcum powder products that are routinely used in the market.
Ultra-fine talc powder has more flaky structure, which can better strengthen TPO plastics, endow TPO products with low shrinkage rate, improve the dimensional stability of products, and be used to produce “thin-walled” products, so that products can be designed Thinner and more precise dimensions.