The heat resistance of the paint film refers to the ability of the paint film to resist heat. The paint film with poor heat resistance may change color, lose light, imprint, bubble, wrinkle, crack and other phenomena when heated. There are not many opportunities for all kinds of wood products to be heated, but the surface of countertop furniture (such as dining table, coffee table, kitchen table, laboratory table, writing desk, etc.) is often heated with teacups; the surface of kitchen furniture may be exposed to hot water, steam and hot oil, and the paint film of such wood products must have high heat resistance.
The heat resistance of the paint film is divided into dry heat resistance and damp heat resistance. The latter requires higher performance of the paint film. When testing the heat resistance of the paint film, it should be divided into two methods: dry heat resistance and damp heat resistance.
According to the two national standards "Determination of Dry Heat Resistance and Moisture Heat Resistance of Furniture Surface Paint Film", when detecting the dry heat of the paint film, use a copper test cup, heat it to a specified temperature and place it on the sample to be tested, and remove it after a specified time., to check the status of the paint film and the rating of the change in gloss. To test the moisture and heat resistance of the paint film, place a damp cloth under the copper test cup.
