Cellulose and oyster shell PP composite - Shokozan Mining Co., Ltd. [N-Plus 2026]

Shokozan Mining Co., Ltd. introduced a PP composite material that uses cellulose and oyster shells at N-Plus 2026. Headquartered in Shobara, Hiroshima Prefecture, the company began as a mining business founded in 1917 and has since refined its technology for crushing and processing minerals from its own mine, while also working on resin compounding for about 30 years.

At the center of the exhibit was a compound designed with a high loading of cellulose from plants and oyster shells from the sea, engineered into a material that is easy to mold. The company emphasized a 51% concentration and said the material is designed to match conditions for different uses, including injection molding, blow molding, and extrusion molding.

The company positions the material as an environmentally conscious offering that draws on the dispersion technology and material design knowledge it has built up over time. Rather than supplying raw materials alone, it presents the product as a plastic compound that customers can shape on their own side, and at the venue it showed a stance of inviting visitors to pick up and examine the actual samples.

Contact the company

Shokozan Mining Co., Ltd.

• Headquarters 広島県庄原市東本町3丁目13番10号
• Established Founded in 1917
• Employees -
• Official website https://shokozan.jp/
• Business areas Carries out the mining and sales of raw materials such as soapstone, refractory clay, and kaolin. It crushes and processes minerals mined from its own mine, and creates products under quality control. It also works on resin compounding technologies that make use of natural minerals, as well as the manufacture and development of bioplastic raw materials.
• Main products and services Soapstone, refractory clay, kaolin