Talcum used as nucleating agent

Used as a nucleating agent

Crystalline polymers such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyamide (PA), etc., in the process of cooling and setting after processing and melting, some macromolecules The arrangement is orderly and is called crystallization. Crystallization not only requires a certain temperature and cooling rate, but also needs to generate crystal nuclei first, followed by crystal growth. The nucleating agent has two main functions. One is that the total crystallization rate is increased, which can ensure that the molten polymer solidifies more quickly during the cooling process, thereby shortening the injection molding cycle and improving work efficiency. The tensile strength, heat distortion temperature and hardness are enhanced by the nucleating agent, the transparency increases and the turbidity decreases.

The use of talc as a nucleating agent for PE or PP requires the particles to be smaller. The smaller the particle size, the greater the number of particles, which means more crystalline centers. The more the number of crystals grown at the same time, the smaller the size of the crystal itself, the better the performance of the entire material. At the same time, it is also required that the dispersion of the talcum powder in the molten state is as complete as possible, and the agglomeration phenomenon is as slight as possible.

Transparent filler masterbatch with talc as main filler

Although the use of calcium carbonate in plastic films can reduce the cost, when the amount is large, the transparency of the film is greatly affected, causing misunderstanding by some users. In view of this situation, the transparent filler masterbatch with talc as the main filler has made significant improvements in the selection of fillers and processing technology, which has greatly improved the transparency of the PE film.

Talcum powder making machine

Clirik’s mills for talc and other materials can accept non-flammable and explosive materials with a Mohs hardness below 20mm and a Mohs hardness below 6. The crushed raw materials are mainly crushed calcite, gypsum, talc, feldspar, barite, kaolin and other materials. Due to the major changes in the main machine’s grinding roller and grinding roller assembly, the material has to go through many times from top to bottom Grinding makes full use of the role of the centrifugal force of the grinding roller, and the contact area with the grinding ring is large, so it can produce high-fineness powder with a fineness between 5-45 microns.