Office chair plastic bases are mainly made of reinforced nylon (such as PA6+GF), modified PP (polypropylene), or glass fiber reinforced engineering plastics, balancing high strength, impact resistance, and lightweight requirements.
Main Material Types and Characteristics
Reinforced Nylon (PA6+GF): Adding 20%–30% glass fiber to nylon 6 significantly improves tensile strength and rigidity, achieving a load-bearing capacity of over 1500kg. It is heat-resistant (up to 120℃) and has strong creep resistance, making it the preferred material for mid-to-high-end office chair bases.
Modified PP (Polypropylene): Through copolymerization or mineral filling reinforcement, it improves the problems of easy aging and low strength of ordinary PP. It has good toughness and corrosion resistance, and is relatively low in cost, making it suitable for light office or home use.
PC/ABS Alloy or Glass Fiber Reinforced PP: Often used for one-piece molded bases, combining the high impact resistance of polycarbonate with the processing performance of ABS. It has good structural stability and is often used in modern office chairs with a strong design aesthetic.
Engineering Considerations Behind Material Selection
Safety: Materials must meet international testing standards such as BIFMA to ensure they do not crack under long-term dynamic loads.
Abrasion Resistance: TPE cushioning layers are often embedded in the toe area, which frequently contacts the ground, to reduce wear and noise.
Environmental Adaptability: To prevent brittleness and cracking in low temperatures or direct sunlight, materials must possess wide temperature range stability.