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Management and Reduction of Chemical Substances

Activities and Results

Hazardous Material Management Activities

Environmentally hazardous materials are defined as materials that may be harmful to the human body or ecosystems when contained in a product. In principle, we prohibit the use of such materials in our components and raw materials. For hazardous substances that may be present as impurities, we have established tolerances and handle such materials accordingly.
In order to comply with each country and region's laws and regulations on hazardous substances, we follow the THK Group Green Procurement Guidelines at THK Japan, Group companies in Japan, and the production facilities of Group companies outside of Japan and provide necessary information to customers upon request. In addition, we submit reports to the relevant authorities as appropriate.
We stringently manage chemicals specified in the PRTR Law1 and are working to switch to products that do not contain such substances.

  • 1　PRTR Law: The Act on the Assessment of Releases of Specified Chemical Substances in the Environment and the Promotion of Management Improvement

Efforts at Each Facility

Kofu Plant

Reducing PRTR Substances

Switched from TM-800 washing fluid to TM-900 in August due to the former containing diethylene glycol monobutyl ether, which was added to the list of PRTR substances.

Gifu Plant

Reducing PRTR Substances

Switched from Noritake Cool NK-81 (4C383), which is used in rail and block grinding, to NK-81L (2E254) in May 2024 due to the former containing hexahydro-1,3,5tris (2-hydroxyethyl) triazine, which was added to the list of PRTR substances.

Mie Plant

Reducing PRTR Substances

Switched from Noritake Cool NK-81 (4C383), which is used in cross-roller ring, curved guide, and ST grinding, to NK-81L (2E254) in May 2024 due to the former containing the PRTR substance triazine.

Yamaguchi Plant

Reducing PRTR Substances

Switched from Noritake Cool NK-81 (4C383) grinding fluid to NK-81L (2E254) in July 2024 due to the former containing the PRTR substance triazine. This reduced the annual use of PRTR substances by 1,700 kg.