IN-PRESS PROCESS FOR COATING COMPOSITE SUBSTRATES

摘要

AN IMPROVE PROCESS FOR MANUFACTURE OF POLYMER COATED COMPOSITE SUBSTRATES IS DESCRIBED. A COATED COMPOSITE SUBSTRATE IS PREPARED IN THE PRESS BY APPLYING A LAYER OF A PRIMER COATING COMPOSITION TO THE SURFACE OF A COMPRESSIBLE MAT COMPRISING FIBERS AND/OR PARTICLES AND A RESIN BINDER. THE PRIMER COATING COMPOSITION IS FORMULATED PREFERABLY AS A FAST SETTING POLYMER LATEX CAPABLE OF FORMING A CHEMICALLY CROSSLINKED POLYMER MATRIX WHEN APPPLIED TO THE SURFACE OF A COMPRESSIBLE MAT. A THERMOSETTING TOP COAT COMPOSITION CAN BE APPLIED DIRECTLY OVER THE WET PRIMER COATING COMPOSITION BEFORE HEAT-PROCESSING THE MAT TO IMPROVE SURFACE QUALITY AND RELEASE CHARACTERISTICS. COMPRESSING AND HEATING THE COATED MAT PRODUCES A PRIMED COMOSITION SUBSTRATE DIRECTLY OUT OF THE PRESS.