Production Technology of Melamine Resin Decorative Board
Melamine resin decorative board is made of several layers of paper impregnated with resin and hot-pressed blanks. Its production process is as follows: surface paper decorative paper impregnated with dry shearing blanks and hot-pressed edge-aligning sand
Melamine resin decorative board is made of several layers of paper impregnated with resin and hot-pressed blanks. Its production process is roughly as follows:
Decorative paper impregnation drying shearing blank matching hot pressing edge aligning sanding inspection finished product
The base paper with special properties is impregnated with colorless and transparent melamine resin, while the base paper is impregnated with phenolic resin glue. After impregnation, the glue evenly penetrates into the paper fibers. Then the impregnated paper is dried to remove volatiles such as moisture and solvent.
Impregnation and drying of various base paper are the key processes in decorative board manufacturing. It is necessary to make base paper fully and evenly impregnate resin solution to meet the required resin content. After impregnating the resin solution, solvent and volatile substances are removed by drying device, so that the resin condensation can be carried out to a certain extent and a part of volatile substance remains, so as to ensure that the resin of impregnated paper is in melting state during hot pressing. Adequate flow.
After soaking and drying, all kinds of base paper are sealed with plastic film and stored in constant temperature and humidity environment. The temperature is about 20 degrees Celsius and the humidity is about 50-60%. After that, according to the thickness required by product specifications, all kinds of impregnated paper are made into blanks. In order to obtain a good surface gloss, cold-hot-cold hot pressing process can be adopted, that is, when the slab enters the press, the temperature of hot plate is below 50 degrees Celsius, so as not to cure the resin locally, and then increase temperature and pressure. Before pressure relief, the hot pressure temperature should be lowered down to 50 degrees Celsius before pressure relief. Open the hot plate. The pressure is about 6-8 MPa. After pressing into a plate, the edge is cut on the vertical and horizontal edge cutting machine, and then sanded on the back of the decorative board. Melamine resin decorative board is produced.
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