Materials and process requirements for each main component of the manufacturing part: first-class cold-rolled steel plate shall be adopted, in accordance with GB/T 3325-2017 "General Technical Conditions for Metal Furniture" HG/T 2006-2006 "Thermosetting Powder Coating" standard, spraying layer shall meet the requirements, physical and chemical properties of metal spray paint (plastic) coating corrosion resistance: Within 100h, no bubbling was observed on both sides of the streak in the solution. After 100h, no rust, peeling, wrinkling, discoloration and loss of light were observed on both sides of the streak in the solution. The contents of heavy metals such as lead, cadmium, chromium and mercury were all less than 5mg/kg. The thickness of steel plate is bare plate thickness: base 1.5mm, column 1.5mm, shelf 1.2mm, hanging plate 1.0mm, top plate 1.0mm. Adopt double column frame structure, mold production. Oil removal, rust removal, pickling, phosphating treatment, matte electrostatic powder, high temperature plasticizing, corrosion resistance, bright color, strong adhesion. The welding parts are firm, the welding mark is uniform, the joint is smooth, no leakage welding, welding penetration, porosity, edge biting, deformation and other phenomena; There is no crack on the surface of the stamping parts. Surface coating should be smooth, uniform color, no flow hanging, granulation, wrinkle skin, bare bottom, peeling, scars and other defects. After the assembly of the bookshelf connection is firm and tight, no deformation, no loose, no burr, acute Angle, protrusion; Elevation load slope ≤3mm after installation. The laminage can be adjusted, each layer of single shelf static load ≥40kg, double-sided ≥80kg.
2. Wood and process requirements of the main components of the wood part: The base material is 15mm thick and high-quality solid wood veneer, concave and convex modeling, the wood is treated by moisture-proof, insect-proof and anti-corrosion chemical modification; Wood texture is consistent, color is uniform, splicing transition natural; Rubber wood should meet the requirements of GB18584-2001, GB/T3324-2017 standard; The selection of high quality environmental protection grade paint, five bottom three surface coating process, in the constant temperature, constant humidity high dust coating room spraying paint and advanced saturated paint process carefully processed. Primer and top paint shall meet the requirements of GB18581-2020 standard. The total content of benzene series [limited benzene, toluene, xylene (including ethylbenzene)] has not been detected. The paint surface is smooth and smooth, feel comfortable; It has good wear resistance, high temperature resistance, strong adhesion, smooth and balanced paint surface. The wooden guard board adopts mortise and tenon joint technology, and the top and bottom decorative strips are tightly combined with the wooden guard board without empty cracks. The thickness of the panel frame is 30mm, the frame type concave and convex modeling, the height of the bottom strip is 100mm, and the height of the top cap strip is 40mm. The outer top of one side guard plate in each column is 400mm from the top to make a label frame with a width of 280mm and a height of 180mm. Adhesive: Adopt high quality environmental protection glue, which shall meet the standard requirements of GB18583-2008 "Limit of Harmful Substances in Adhesives for Interior Decoration Materials". Benzene, toluene and xylene are not detected, and the adhesive force is strong without cracking. Hardware accessories: The use of high quality hardware accessories, all hardware for rust - proof, anti-corrosion treatment, durable, strong installation.