What is PP talc powder masterbatch

2021-10-13 2013

What is the masterbatch of PP talc powder?

PP talc powder masterbatch is a plastic modified filler, mainly composed of talc powder, which is a particle mixed with polymers or other carriers. It is mainly used to improve the performance of rubber, plastic, resin, and other materials. It can greatly improve the rigidity, high-temperature creep, heat resistance and other properties of fillers

Talc is a silicate mineral with an aquifer like structure. Chemical formula: Mg3 (Si4O10) (OH) 2. Its chemical composition: MgO is 31.8%, SiO2 is 63.37%, H2O is 4.7%, containing small amounts of elements such as Fe and A1. The density of talc is 2.7-2.8g/cm, and its hardness is the smaller among mineral fillers. The Morse hardness is 1, making it soft and smooth. Its colors have pearl or fat luster, including white, gray, green, cream, light red, light blue, light gray, etc. At 380~500, the binding number may be lost, and above 800, the decision number may be lost. Talc is slightly alkaline in water, with a pH value of 9.0~9.5.

Talc has a layered structure, and adjacent layers are combined by weak van der Waals forces. When external forces act, it is easy for two adjacent layers to slide or separate from each other. Therefore, the basic shape of talc particle structure is sheet-like or scaly.

Due to the sheet-like structure of talc powder, some properties of plastic filled with talc powder have been greatly improved, and some people believe that talc powder is a reinforcing filler. Firstly, talc powder can improve the stiffness of the filler and its resistance to creep at high temperatures. When talc particles are arranged along the direction of material flow during processing, according to the principle of small resistance, their arrangement is basically connected by small pieces. Therefore, material stiffness can be greatly improved in specific directions. 2、 Talcum powder can greatly improve the heat resistance of fillers. The thermal deformation temperature used to measure the heat resistance of materials is the temperature at which the sample is bent to a certain degree under load during processing. Flaky talc powder can increase the thermal deformation temperature of the material in a specific direction.

The price of talc powder in silicone fillers is relatively low, which can reduce costs.


Composition editing: The main component of talc powder is magnesium silicate containing talc water, with the molecular formula Mg3 [Si4O10] (OH) 2. Talc belongs to monoclinic grain boundaries. Crystals are pseudo hexagonal or rhombic flakes that can occasionally be seen. It is usually a compact block shaped, leaf shaped, radial, fibrous aggregate. Colorless transparent or white, but due to a small amount of impurities, it appears light green, light yellow, light brown, and even light red. Explain that the face has a pearl luster. Hardness 1, specific gravity 2.7~2.8.

Talc has good physical and chemical properties such as lubrication, viscosity, auxiliary properties, fire resistance, acid resistance, insulation, high melting point, inactive chemical properties, good coverage, softness, good gloss, and strong adsorption.

The article originates from; Taishan conductive PP masterbatch http://www.bethanythompsonmmj.com/