Office Chair Prototyping Materials

When prototyping office chairs, it is essential to focus on structural design, functional configuration, material selection, and dimensional parameters. Below is specific reference material:

I. Key Points of Structural Design
Take the brown mesh chair (executive chair) as an example; its structure must meet modular design requirements. The headrest is connected with a flat single rod, with a height range of 590-710mm, ensuring smooth lifting and reclining functions; the backrest is divided into upper and lower sections, connected with soft rubber for dynamic fitting, and the lower section is integrated with the lumbar pad to enhance lumbar support; the support frame is Y-shaped, with a thickness of 18-31mm, and must be connected to the backrest with three-point locking screws and a rotating shaft to ensure structural stability; the seat adopts a square design, wider at the front and narrower at the back, with a length of 440-490mm, requiring optimization of the composite process of foam and mesh to improve comfort; the armrests must support height adjustment from 165-240mm and 3D rotation functions, with a combination of aluminum alloy and PP/PU materials balancing strength and tactile feel; the backrest recline angle is fixed at 26°, requiring testing of the smoothness of the synchronous tilting function; the chair base has a diameter of 340mm, with the aluminum alloy material passing load-bearing tests, and the PA/PU casters must meet the requirement of preventing scratches on the floor.

II. Functional Configuration Standards
Ergonomic design must be integrated throughout the chair. The lumbar support adjustment function must cover a range of 150-200mm vertically and more than 50mm horizontally to accommodate users of different body types; the seat cushion must adopt a composite structure of high-density foam (density ≥ 45kg/m³) and breathable mesh, with a recommended seat depth adjustment range of 395-440mm; armrest adjustment must include three dimensions: height, forward and backward, and left and right rotation, with uniform adjustment damping; the backrest recline must be equipped with multi-level locking functions, and the synchronous tilting mechanism must pass 100,000 fatigue tests; executive chairs must additionally include a seat surface sliding function forward and backward (sliding range ≥ 60mm) and backrest tilt resistance adjustment (adjustable resistance value of 5-20N·m).

III. Material Selection Specifications
Materials must balance durability and comfort. Plastic components (such as the headrest inner frame and backrest frame) must be made of PP or PA materials and pass temperature difference tests from -20℃ to 80℃; metal components (support frame, chair base) must use 6063 aluminum alloy, with an anodized surface treatment thickness of ≥ 15μm; foam must comply with the CA117 fire safety standard, with a rebound rate of ≥ 45%; mesh must pass 50,000 abrasion resistance tests, with a breathability rate of ≥ 2000g/m²·24h; leather materials must meet the GB/T 16799-2018 standard, with a tear strength of ≥ 30N/mm.

IV. Dimensional Parameter References
General dimensions must conform to ergonomics: the seat height of staff chairs is recommended to be 440-530mm, with a seat width of ≥ 460mm; the seat depth of swivel chairs is 440-490mm, with a backrest height of ≥ 535mm; the seat height of conference chairs is 450-500mm, with an overall height of ≤ 1190mm to accommodate conference table heights. Special designs must reserve adjustment allowances, such as the highest point of the lumbar support being at least 100mm lower than the lowest point of the headrest, and the highest point of the armrests being 20mm lower than the edge of the desk to avoid interference.