1. Fabric: Use high-quality first-layer calfskin, thickness ≥1.5mm, tearing force ≥40N, coating adhesion fastness ≥2.5N/10mm; after liquid immersion, moisture-proof, anti-fouling and other processes, the leather surface is soft and comfortable , Lasting luster.
2. Sponge: Use high-quality high-density flame-retardant sponge, covered with drawn yarn or velvet, with anti-corrosion and anti-deformation protective film on the surface, high resilience, high durability, shatter-proof, anti-oxidation, rebound rate ≥ 35%, stretch Tensile strength ≥90kPa, elongation ≥130%, tensile strength after dry heat aging ≥55kPa, tensile strength after wet heat aging ≥55kPa, strong fatigue resistance and comfortable sitting feeling.
3. Frame: The high-quality solid wood frame is used for insect-proof and anti-corrosion special treatment, and the moisture content is ≤10% to ensure firmness and reliability, long-term use without looseness and decay; the back bottom is processed by a high-frequency hot press to form a multi-layer curved wooden board, which conforms to Ergonomics.
4. Paint: The use of high-quality brand environmentally friendly paint, after five-bottom and three-sided painting process, the wood grain texture is clear, the color is uniform, smooth and durable; VOC≤650g/L, benzene mass fraction ≤0.05%, toluene, xylene, ethylbenzene mass fraction ≤20%, free toluene diisocyanate (TDI) mass fraction in curing agent ≤0.5%, soluble heavy metal soluble lead (Pb) <2mg/kg, soluble cadmium (Cd) <0.5mg/kg, soluble chromium (Cr )<1mg/kg, soluble mercury (Hg)<1mg/kg; halogenated hydrocarbon content ≤0.1%.
