There are serious quality problems in the most fir

2022-08-15
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Shengdan polyurethane and other coatings have serious quality problems

in the first quarter of 2011, Shanghai Municipal Bureau of quality and technical supervision completed a special supervision and spot check on the quality of solvent based wood paint products produced and sold in the city. Among them, a batch of products of Shanghai Shengdan chemical coating Co., Ltd. are unqualified, which is a serious quality problem. This product is listed in the national compulsory certification (CCC) catalogue. In this spot check, 56 production enterprises in the city were selected, and 41 products were actually selected. The remaining 15 enterprises failed to obtain samples due to shutdown, relocation and other reasons. A batch of products of Shanghai Shengdan chemical coating Co., Ltd. are unqualified, which is a serious quality problem

a total of 77 batches of products were randomly selected, and 9 batches were unqualified after inspection. Among these 77 batches of products, there are 68 batches of products produced in this city, and 9 batches are unqualified; There are 9 batches of products produced in other provinces and cities, and 0 batch is unqualified

this supervision and random inspection is based on gb/t solvent based nitrowood coatings for interior decoration, gb/t solvent based polyurethane wood coatings for interior decoration, and gb/t solvent based alkyd wood coatings for interior decoration GB "indoor decoration materials solvent compensator spring fatigue testing machine specially designed and developed for simulating the fatigue life detection of springs and Elastomers Used in high and low temperature environments. Harmful substances in equipment type wood coatings. Above, we introduce the classification of spring fatigue testing machines and how to choose suitable equipment quality limits" and other national standards and relevant standards, and test the following items:

1 Solvent based wood coatings polyurethane paint: volatile organic compounds (VOC) content; Benzene content; Toluene, ethylbenzene Xylene "target=_blank sum of xylene; sum of free diisocyanate (TDI, HDI) content; halogenated hydrocarbon content; soluble heavy metal content (color paint); pencil hardness (scratch); adhesion; dry heat resistance; alkali resistance; water resistance; alcohol resistance; pollution resistance; yellowing resistance.

2, solvent based wood coatings - nitro paint: volatile organic compounds (VOC) Content; Benzene content; Sum of toluene, ethylbenzene and xylene; Methanol content; Halogenated hydrocarbon content; Soluble heavy metal content (color paint); Pencil hardness (scratch); Adhesion; Dry heat resistance; Alkali resistance; Water resistance; Pollution resistance

3. Solvent based wood coatings alkyd paint: benzene content; Sum of toluene, ethylbenzene and xylene; Halogenated hydrocarbon content; Soluble heavy metal content (color paint); Adhesion; Dry heat resistance; Alkali resistance; Water resistance; Pollution resistance

the unqualified items found in this supervision and random inspection are as follows:

volatile organic compounds (VOC) content: exceeding the standard of volatile organic compounds will cause headache, nausea, vomiting, fatigue, etc., and harm human organs. The national standard limit index is 500 ~ 720g/l (different indicators according to different products). In this spot check, 5 batches of products of this project are unqualified, which is a serious quality problem

toluene, xylene and ethylbenzene: toluene, xylene and ethylbenzene are moderately toxic solvents, and the length of harm to human body includes one complete pore and two unit samples accumulated between complete pores). It mainly affects the central nervous system, and the limit index of the national standard is 5 ~ 30% (according to different indicators of products). In this spot check, two batches of the project are unqualified

free diisocyanate: the limit index of the national standard for this index is 0.4%. In this spot check, two batches of products of this project are unqualified

halogenated hydrocarbon: halogenated hydrocarbon is a medium toxic solvent, and the limit index of the national standard is 0.1%. In this spot check, three batches of products of this project are unqualified

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