Views:120 Author:--- XINGSHI NATURAL GRAPHITE Publish Time: 2019-08-13 Origin:Site
We use pencils in our daily life. The words written are gray and black. What materials are used in them?
It's graphite powder. Graphite powder for pencil lead? The answer is graphite powder.
In the process of producing pencil lead, the raw materials are mainly graphite powder and clay. The quality and price of graphite powder have a great relationship with the process flow of graphite manufacturer. Graphite is a colorant. Graphite powder is mixed with clay and other raw materials in a certain proportion. After mixing by kneading machine and three roller machine, lead core with a certain specification and size is extruded by core pressing machine, heated, dried and roasted at high temperature, It has certain mechanical strength and hardness, and is finally made by oil immersion treatment.
Graphite powder has high carbon content, good lubricity, stable chemical properties, high temperature resistance and corrosion resistance. Granular olefin is soft and easy to form. It can be made into lead core, which can draw black marks, firmly adhere to the paper, and can be wiped off with rubber.
The pencil produced with XINGSHI graphite for pencil lead has high bending strength, low wear and smooth writing.