When it comes to using wooden doors indoors, the issue of paint pollution from these products has also entered our daily lives. Due to concerns about formaldehyde, many consumers are drawn to the so-called "zero formaldehyde" wood doors and furniture. But is there really a "zero formaldehyde" wooden door? Industry experts suggest that "zero formaldehyde" is more of a marketing trick than a real solution. According to current manufacturing processes, achieving true "zero formaldehyde" in wooden doors is nearly impossible. So, the real question is: how can we reduce the amount of formaldehyde released during daily use and decoration?
Formaldehyde in wood products is a complex issue. There are very few scientific studies that clearly quantify its health risks. Testing methods for formaldehyde content vary widely, and there's no universal standard. This makes it easy to publish papers based on collected data. In China, our national standards are based on Japanese and European regulations, such as E1 and E2 levels. While E1 is better than E2, the difference isn't significant enough to guarantee safety. Moreover, testing procedures are complicated and results can be biased depending on who conducts them. The current testing system isn’t perfect. E0 is largely a marketing term, misleading consumers.
There's a gap between the supervision system for wood products and actual quality control. Formaldehyde levels are typically tested through sampling, but this process is often manipulated. Factories may prepare special samples before inspections, making it easy to pass tests. This is a systemic issue—similar to how some milk producers might test only the sample and not the actual product. Therefore, most test reports cannot fully guarantee the formaldehyde levels in wood products. They usually state that they are responsible only for the "sample," which is similar to a diploma—it shows capability, but not the real performance. Still, such reports can be used in legal disputes.
The formaldehyde content in wooden doors varies depending on the material and structure. Wooden doors are generally divided into solid wood doors and composite doors. In terms of formaldehyde emissions, composite doors tend to release more than solid wood ones.
Solid wood doors are typically made entirely from a single piece of natural wood, with minimal or no use of adhesives (though urea-formaldehyde glue may still be used in some cases). The joints are often connected via traditional structures like mortise and tenon, with little need for chemical glues. However, even solid wood doors may contain some formaldehyde due to the use of adhesives in certain parts.
Composite doors, on the other hand, rely heavily on adhesives and manufactured wood panels such as MDF, particleboard, or plywood. These materials often contain high levels of urea-formaldehyde glue, which significantly increases formaldehyde emissions. The complexity of their construction makes formaldehyde control more challenging.
If you're looking for a luxury option, custom-made solid wood doors can help minimize the use of chemical adhesives. However, even then, the type of glue, its form (liquid or solid), and the pressing method (hot or cold) can affect formaldehyde levels. It’s important to specify these details clearly with your manufacturer.
For those choosing composite doors, it's crucial to check the materials used, especially in the door frame and trim. Opting for doors made from plywood or natural wood can reduce formaldehyde exposure. Always verify the internal structure before installation. Look at the cross-sections provided by the seller and inspect the door panel and frame carefully. If anything seems off, don’t hesitate to raise concerns with the seller.
For mass production, the cost of solid wood doors is around 1,500 yuan each. Unfortunately, most composite doors on the market are made from MDF or particleboard. While the formaldehyde levels may be within acceptable limits, the impact on health is still a concern. Life itself is full of risks, and formaldehyde is everywhere—found in clothes, fabrics, and even exported goods that are exposed to the air before being shipped.
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