1. Residue on evaporation: ≤10mg/l;
2. Potassium permanganate consumption: ≤10mg/l;
3. Formaldehyde: ≤30mg/l;
4. 65% ethanol decolorization test: negative;
5. The product's heat resistance, impact resistance, bending resistance and other properties and sanitary indicators can meet the requirements of GB9690-88.
Due to the difference between the actual curing degree and the theoretical curing degree of melamine plastic products and the influence of acid, alkali, grease, alcohol, and long-term heat exposure, after a certain period of use, the surface of the melamine plastic products will easily form a brown layer upon friction. Mottled marks.
Therefore, the technical performance of the solvent-resistant melamine plastic products to be developed will reach:
1. Potassium permanganate consumption (Mg/L): ≤3;
2. The product's heat resistance, impact resistance, bending resistance and other properties and sanitary indicators can meet the requirements of GB9690-88 and QB1999-84;
3. Extractable formaldehyde≤1.0mg/l.
