Fast nondestructive detection cover for formaldehyde emission as well as nondestructive detection method

Abstract

The invention relates to a fast nondestructive detection cover for formaldehyde emission as well as a nondestructive detection method. The fast nondestructive detection cover for formaldehyde emissioncomprises a cover body, a cover port and a sampling detection port, wherein sealing gaskets are mounted on the cover port and the sampling detection port respectively, and air in the cover can be in a relatively sealed state during detection. The nondestructive detection method comprises the following steps: (1), the surface of a to-be-detected sample is directly covered with the cover port of the detection cover; (2), a portable direct-reading formaldehyde analyzer is placed directly in the cover or the sampling detection port of the detection cover; (3), the sealing gaskets on the sampling detection port and the cover port are sealed, the initial concentration A0 of formaldehyde in the air in the cover is read directly from the formaldehyde analyzer; (4) after a certain time, the final concentration A1 of formaldehyde inthe air in the cover is read directly from the formaldehyde analyzer; and (5) the difference between A1 and A0, namely, the difference between the final concentration and the initial concentration is calculated, and the difference is the formaldehyde emission of the to-be-detected sample in the certain time. The fast nondestructive detection cover is simple in structure, high in applicability, low in cost and good in measured data repeatability, and the formaldehyde emission of to-be-detected furniture and decoration materials in the practical using environment can be reflected truly and objectively without damaging the detected sample.

Description

Technical field [0001] The invention relates to a rapid non-destructive detection cover for formaldehyde emission of furniture and decoration materials and a non-destructive detection method. Background technique [0002] At present, in the current national testing standard GB18584-2001, the national standard method for detecting the formaldehyde emission of furniture, man-made panels and other decoration materials is the dryer method, and the sampling device is a 9-11L glass dryer. This method is After splitting and breaking the furniture board, take 150mm×50mm×10 sample blocks and put them in a desiccator, use a certain volume of distilled water as absorbent, seal the desiccator, and place it at (20±1)℃ After 24 hours, measure the formaldehyde concentration in distilled water as a constant evaluation standard for formaldehyde content in furniture or artificial boards. The advantage of this method is that the sampling method is simple and the finished product is relatively low....

AI Technical Summary

Problems solved by technology

The advantage of this method is that the sampling method is simple and the finished product is relatively low. The disadvantage is that the test period is long, and the whole furniture needs to be destroyed for measurement, and the tested samples cannot be recycled, which increases the cost of the enterprise and causes pollution to the environment

[0003] At present, at home and abroad, in order to avoid damage to furniture, the climate chamber method is generally used as the detection of formaldehyde emission from furniture and decoration materials. This method uses the climate chamber to simulate the real furniture and other use environments to treat furniture and decoration materials , the disadvantage is that the minimum environmental test chamber of the climate chamber method is 1m 3 , up to 30m 3 Even larger, small environmental test chambers also require destructive sampling of furniture or panels, and large environmental test chambers are expensive, immovable, and costly to run

As a legal test method, the environmental test warehouse method generally takes more than one week or even longer to test, which cannot meet the general quality inspection and quality control requirements of the regulatory department for market sampling, factory inspection, or production enterprises for finished products.

[0004] Patent CN101526469B "Non-destructive testing device and non-destructive testing method for formaldehyde emission of furniture products" just puts the distilled water absorption liquid in the dryer method of the national standard into a testing device made of PVC. Although non-destructive testing can be achieved, the device testing takes time , it still needs 8-12 hours of absorption to detect the amount of formaldehyde released by chemical colorimetry, which cannot meet the requirements of rapid non-destructive testing. , the reliability of the detection data is also questionable

Patent CN202494590U "Sampling Device for Nondestructive Testing of Environmental Protection Performance of Furniture and Decorative Materials" enters the air duct through the fan, heats it to a certain temperature through the heater, and removes volatile organic substances such as formaldehyde and TVOC through the air filter. After reaching the surface of the sample, it flows along the surface of the sample in a relatively sealed cabin, and mixes with the volatile organic compounds emitted from the surface of the sample, and finally the mixed gas is input into the relevant analytical instrument for detection, although the temperature of the air on the surface of the test sample is controlled by heating the air , but the temperature of the test sample is difficult to control in a short time to meet the test requirements, the actual operation is troublesome, and it is only a non-destructive sampling device, it is difficult to meet the requirements of fast formaldehyde release and non-destructive testing

[0005] In the process of selling or using furniture or wood-based panel decoration materials, it is currently difficult to pass the existing detection methods or devices, so that merchants or consumers can intuitively know the formaldehyde emission of products in a timely manner

General merchants can only provide paper test reports for batch products, but cannot inform consumers of the formaldehyde emission of the products they sell through rapid non-destructive testing methods at the sales site

If consumers doubt the amount of formaldehyde released by the purchased furniture and other decorative materials during the use of the product, not only must the furniture be destructive to test, but the test cycle is long

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