Significance of formaldehyde emission measurement of wood-based panels
Formaldehyde detection refers to the quantitative detection of formaldehyde in air, water, food, clothing, wooden-board, leather and so on by specific methods or instruments. Formaldehyde is found in white or non-ironing clothes, especially some jeans, clothes that boast 100% wrinkle-proof and shrink-proof, or cotton non-ironing shirts, which are shaped with glyoxal resin.
Formaldehyde has a strong stimulating effect on human skin, which can cause skin eczema and systemic allergies.
The World Health Organization has identified formaldehyde as a carcinogen.
All kinds of phenolic resin wood-based panels, such as plywood, veneer, fiberboard and particleboard, are used as decorative materials such as wall panels and ceilings.
The formaldehyde testing equipment of plywood meets the national standards for formaldehyde emission testing of plywood according to “dryer method”, “GB/T 17657-2013 test method for physical and chemical properties of wood-based panels and veneer wood-based panels” and “formaldehyde emission in wood-based panels and their products of indoor decoration materials GB18580-2001″, which can meet the formaldehyde emission testing of plywood, wood-based panels and their products of grade E1.
The formaldehyde detection system adopts the same implementation standards, detection methods and instrument specifications as the quality inspection and commodity inspection agencies.
1. Type test is the test item of this standard.
2. Sampling according to the number of samples prescribed by the test method in the same place, the same category, the same specifications of wood-based panels and their products randomly selected three, and immediately sealed the samples with packaging materials that will not release or adsorb formaldehyde for testing. When a manufacturing enterprise extracts samples, it must extract samples from products that are labeled qualified in the finished product warehouse of the manufacturing enterprise. When a distributor extracts samples, it is necessary to identify qualified products in the distribution site or in the finished product warehouse of the distributor. Samples must be randomly sampled from the same product in the same place during construction or use.
3. Rules for determination and re-examination of formaldehyde emission from three randomly sampled samples are determined to be qualified if the results of determination meet the requirements of this standard. If the results do not meet the requirements of this standard, the other two samples will be determined again. If two samples meet the requirements of this standard, they will be judged to be qualified; if only one of the two samples meets the requirements or two samples do not meet the requirements, they will be judged to be unqualified.
4. Inspection Report
4.1. The contents of the inspection report shall include product name, specifications, categories, grades, production dates and inspection criteria.
4.2. Test results and conclusions and water content of samples.
4.3. Anomalies and other problems that need to be explained in the course of inspection.
8. The product logo shall be marked with product name, product standard number, trademark, manufacturer name, detailed address, product origin, product specifications, model, grade and formaldehyde emission limit.