Measuring method of precuring degree of melamine impregnated paper
Impregnated paper has now been widely used in life, bringing great convenience to life. In the production and use of impregnated paper, there are some standard requirements for impregnated paper. Let's take a look at the pre-curing of impregnated paper. degree measurement method.
The ratio of the precured degree of water-insoluble glue to the absolute dry glue content in the impregnated paper, expressed as a percentage.
After weighing the three specimens, put them in a water bath containing enough distilled water at 40±2℃ (note: the water surface should be more than 10mm above the specimens), soak them for 20 minutes, and hang them at room temperature. After drying for 15min, put it in a constant temperature blast drying oven at 160±2℃ for 10min, take out the test piece, immediately put it into a desiccator for cooling for 5min, and weigh it to the nearest 1mg.
Pre-curing degree u003d (weight of impregnated paper after soaking and drying - weight of base paper) * 100/(quality of impregnated paper before soaking - weight of impregnated paper before soaking * volatile matter of impregnated paper for 10 minutes - weight of base paper )
We select qualified products in the measurement, and choose the best. Hope the above method can bring you convenience. For more impregnated paper related content, please continue to pay attention to the official website, thank you.