Low-Quality Sponge in Office Chairs

There is indeed a situation where low-quality sponges are used in office chairs, which may pose health risks and harm consumer rights.

1. Common Types of Low-Quality Sponges
To reduce costs, some merchants use recycled sponge or "black-hearted cotton" instead of virgin cotton. Recycled sponge is usually made by gluing sponge waste together, costing only half as much as virgin sponge but potentially containing harmful substances like formaldehyde. For example, chair cushions bought online for several hundred yuan have been exposed for containing recycled sponge glued with adhesives that pose a risk of formaldehyde exceeding standards; another ergonomic chair with monthly sales of 20,000 units was accused of being filled with "black-hearted cotton," although the merchant claimed it was "virgin blended cotton," such materials may have issues like many impurities and poor elasticity.

2. Hazards of Low-Quality Sponges

• Health Risks: The adhesives used in the production of recycled sponge may release formaldehyde, and long-term exposure may cause respiratory diseases, skin allergies, and even increase the risk of cancer. Some manufacturers may falsify formaldehyde test reports to cover up problems and mislead consumers.
• Poor Comfort: Low-quality sponge lacks elasticity and is prone to collapse, leading to unstable sitting postures and potentially causing musculoskeletal problems such as back pain.
• Low Durability: Cushions filled with crushed sponge or waste materials are prone to deformation and cracking, with a service life much shorter than that of qualified products.

3. Identification and Prevention Recommendations

• Observe Appearance: Virgin cotton has a uniform color and fine texture; low-quality sponge may have a mixed color, debris, or glue marks.
• Press Test: High-quality sponge rebounds quickly and evenly; low-quality sponge recovers slowly after pressing or collapses locally.
• Smell: If there is a pungent chemical odor, it may contain harmful substances like formaldehyde.
• Check Certification: Choose products certified by national safety standards (such as GB 18401-2010) and request merchants to provide formal test reports.
• Select Channels: Prioritize buying branded products, avoid low-price traps, and be wary of vague promotions like "virgin cotton" and "eco-friendly cotton."

Consumers should be vigilant and make multi-dimensional judgments to avoid buying low-quality products and protect their health and rights.