CH
EN
Fire-proof board, also known as refractory board, is a high-pressure laminated board with thermosetting resin impregnated paper. It is a refractory building material for surface decoration. It has rich surface color, lines and special physical properties. It is widely used in indoor decoration, furniture, kitchen cabinets, laboratory countertops, external walls and other fields. Fire-proof board is made of kraft base paper by impregnation process of melamine and phenolic resin at high temperature and pressure.
Defects and Solutions in Fire-proof Board Production
I. Surface Cracking of Decoration Board
Reasons for this:
1. The resin reacts too tenderly and the molecule is too small.
2. Incomplete curing of resin
3. The glue content of surface film paper is too high.
Solutions:
1. Discontinuation of unqualified resins
2. Appropriate increase of hot pressing temperature or prolongation of hot pressing time
3. Controlling the Glue Content of Surface Film Paper
2. Decoration board stratification
Reasons for this:
1. The volatile content of the film paper is too low, and the film paper cures locally when it is dried.
2. Insufficient resin content in film paper
3. Low pressure or insufficient hot pressing time
4. Impurities between film paper
Solutions:
1. Control volatile content should not be too low, drying temperature should not be too high, time should not be too long, prevent local curing of resin.
2. Improving the glue content of film paper
3. Increasing pressure appropriately and prolonging heating time
4. Pay attention to the sundries when laying moulds
3. Warpage of Decoration Board
Reasons for this:
1. Inhomogeneous thickness of tissue components of various base papers
2. The adhesive content of film paper is not uniform and the pressure is not uniform everywhere.
3. Failure to cool sufficiently after heat preservation during pressing
Solutions:
1. All kinds of base paper should meet the technological requirements.
2. Keep the resin concentration uniform and adjust the clearance of extrusion roller
3. Cooling below 50 degrees for pressure relief
