1. The main body of the frame is 35 * 80 flat tube with a wall thickness of more than 2.0mm. All the materials are SPCC grade I electrolytic galvanized cold rolled steel imported from Japan, which conforms to the Japanese industrial standard jisg3141. The steel pipe adopts high frequency welded steel pipe, with good mechanical properties, flat surface, no phosphating treatment, and strong anti rust ability.
2. The wall thickness of the base frame is more than 5.50mm cold-rolled steel, and the length is more than 200mm. More than 3 screws are required to connect with the base plate, and self gravity rebound is required. The seat can achieve more than 200000 reciprocating movements. The mechanism connection needs to be sealed with iron sheet, which is solid, firm, beautiful and noise free.
3. The thickness of the laminate is more than 18 mm.
4. The tabletop board is faced with 2mm fire-proof board, and formed after the duck mouth edge. Fireproof board is wear-resistant, heat-resistant, acid and alkali resistant, smoke resistant, impact resistant and other properties, with bright colors and realistic patterns. The base material of desktop board is E1 grade high-density MDF, and the formaldehyde emission must be less than or equal to 1.5mg / L (or the formaldehyde content is less than or equal to 0.5mg / 100g), which conforms to GB18580-2001 formaldehyde emission limit standard of wood-based panel and products.
5. Malaysian oak for back, seat plate and handrail, 7 strips of 50 * 25 are used horizontally for seat, 6 strips of 48 * 25 are used vertically for back, mortise and form. The pressure of the board is up to 300kg, which is treated by high temperature fumigation, moisture-proof, anti-corrosion and insect resistant chemical treatment. The surface is water-based environmental protection paint, mortise and form. It features good adhesion, high strength, durability, smooth surface, clear texture and beautiful color. The paint has no peculiar smell, VOC content is less than 200g / L, no toxic and harmful organic solvent, no free TDI, no heavy metal. In strict accordance with gb-18581-2001, the limit of harmful substances in solvent based wood coatings and QB / t3657.1-1999, wood furniture finishing process, polyurethane varnish finishing process specification.
6. The surface of steel pipe is electrostatically sprayed. It has strong adhesion, good glossiness, hard plastic powder, wear resistance and impact resistance. It has the properties of water resistance, sun resistance, light preservation and color preservation. The surface of spraying layer is fine, smooth and bright.

7. The safety and environmental protection test of seats shall meet the strength and durability standards of chairs and stools in GB / 10357.

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