Underbase for flooring board is a plywood used as a substrate for flooring materials. ○Product Standards Complies with various standards stipulated in the Japanese Agricultural Standard (JAS), including "bending tests," "adhesive strength tests," and "formaldehyde emission tests." ○Technical and Functional Characteristics ・Cross-laminated structure: Five or more veneers are bonded with their grain directions perpendicular to one another, reducing anisotropy in bending performance. ・Knotholes inherent to softwood plywood are filled with putty and repaired, resulting in a smooth surface finish. ○Technical Data ・Standard product dimensions: Width 945 mm × Length 1,840 mm, etc. ・Thickness: 9.1 mm, etc. ・Strength grade: Grade 2 ・Adhesive durability: Phenolic resin adhesive is used, achieving the highest JAS classification of "Special Class (Toku-rui)" for water and moisture resistance. ・Formaldehyde emission grade: F☆☆☆☆ (highest grade). ○Features of the Kohoku Plant ・The Kohoku Plant commenced operations in 2012. It is a plant specializing in the production of plywood for flooring base boards.