Inspection of Office Chairs

Inspecting office chairs requires comprehensive testing in terms of materials, physical properties, structural safety, and the release of harmful substances. The specific methods are as follows:

1. Material Inspection Determine material quality through a combination of sensory evaluation and professional equipment. For leather, observe whether the texture is natural and whether the touch is soft and delicate; genuine leather remains non-sticky and offers excellent breathability after prolonged sitting. For fabrics, check wear resistance and color fastness. Metal components need to be tested for corrosion resistance, such as evaluating rust prevention capabilities through salt spray tests. Wood should be tested for moisture content and compressive strength to prevent deformation and cracking. Polymer materials (such as plastics and sponges) need to be tested for density and resilience to ensure support and comfort.

2. Physical Property Testing Use professional equipment to simulate real-world usage scenarios and evaluate durability and stability.

• Seat Durability: Use a seat reciprocating impact tester to continuously impact the seat with a 57KG sandbag from a height of 30mm, simulating long-term sitting pressure, and check for seat collapse or structural looseness.
• Backrest Fatigue: Utilize an office chair backrest recline fatigue tester. After fixing the chair wheels, apply an iron disc load to simulate human weight, and apply a load with an adjustable angle of 15 degrees to 90 degrees and a frequency of 10 to 30 times per minute for a test cycle of up to 120,000 times to evaluate the durability of backrest connectors and springs.
• Stability Testing: Test the load-bearing capacity of the five-star base and the sliding resistance of the wheels to ensure the chair is not prone to tipping over when tilted or moved.

3. Structural Safety Inspection Check the connection strength of key components and overall stability. For example, the gas lift needs to pass pressure tests to verify smooth lifting and explosion-proof performance; the connection between the backrest and the seat should be tested for welding or screw tightness to prevent looseness after long-term use; the armrests need to be tested for load-bearing capacity to prevent breakage risks.

4. Harmful Substance Detection Use chromatography or electrochemical sensors to detect formaldehyde emissions and ensure compliance with environmental standards. Adhesives and coatings commonly used in office chairs may release formaldehyde. According to standards such as GB 18584-2001, the formaldehyde emission limit should be ≤1.5mg/L.

5. Inspection Standard Basis Inspections should comply with domestic and international standards. For example, seat durability refers to ASTM F1561, and backrest fatigue is based on GB/T10357 and QB/T2280-2007 to ensure data comparability and product compliance.

Through the above multi-dimensional inspections, the quality and safety of office chairs can be comprehensively evaluated, ensuring user health and a good user experience.