Method of producing a low density composite sheet material

摘要: AN OPAQUE MICROPOROUS FILM SUITABLE AS PAPER AND CAPABLE OF BEING PRINTED. THE HAS AT LEAST TWO POLYMERS WHICH ARE INCOMPATIBLE WITH EACH OTHER ONE IS IN EXCESS A GLASS TRANSITION TEMPERATURE 40*C. LOWER THAN THAT ANOTHER POLYMER IT INCOMPATIBLE. DRAWING ABOUT POLUMER RESULTS OPACITY.