|Product Name:||Cute Children’s Moving Pencil|
|Main Uses:||Studio, School|
|Place of origin:||Ningbo,China|
|Feature:||Creative, beautiful, concise and generous|
|The automatic pencil is a pencil whose spring restores to its original position after releasing the dynamic pressure. The special lead core of fine-core movable pencil has the characteristics of high flexural strength and good writing performance. It mainly uses synthetic resins as lead-core binders, commonly used are polyvinyl alcohol, asphalt, furan resin, polyvinyl chloride, ABC resin, vinyl chloride-vinyl acetate copolymer, graphite as lead-core colorants, commonly used solvents such as water, ethanol, etc., often using dioctyl phthalate, Tricresol phosphate as plasticizers to reduce the flow viscosity of resins at high temperatures and improve the formation of resins. Forming performance; usually using lead stearate as stabilizer to prevent resin aging and inhibit oxidation process; using liquid paraffin, low molecular weight polyethylene and other lubricants to improve the fluidity of resin melt.
Resin fine lead core is made by calcining and carbonizing at high temperature under the protection of inert gas (such as argon) or under sealed conditions, which has high mechanical strength and good writing performance.