1 From High Pressure Part
difference between top and bottom is too much makes two sides film
paper of the board resin curing is different. So the temperature of the
top plate is 3 to 5 degree high than bottom plate.
2 From Raw Material Part
The different function of tow layer impregnated paper also makes board warpage. Only one side has the glue paper will makes board warpage.
Supplier can solve this problem during production. The factory can use the same decorative paper or make the temperature of top plate and bottom plate same.
To produce melamine impregnated paper, factory must use excellent printing decorative paper, raw material and reasonable processing technology.