PROCESS AND APPARATUS FOR PRODUCING CRYSTALLINE RESIN FILM OR SHEET

The present invention is a process and apparatus for manufacturing a crystalline resin film or sheet. This manufacturing apparatus includes: an extruder (10) that melts crystalline resin while supplying it; a gear pump (20) that is provided on the downstream side of the extruder (10); a die (30) which is provided on the downstream side of the gear pump (20), and which has a slit-shaped aperture; a cooling apparatus (40) which cools film-shaped or sheet-shaped crystalline resin (A) discharged in a melted state from the die (30) to a temperature which is not less than the crystallization temperature but not more than the melting point; and a pair of pinch rolls (50a, 50b) that press-roll between them the film-shaped or sheet-shaped crystalline resin (B) which has passed through the cooling apparatus (40), wherein the pair of guide rolls (50a, 50b) are positioned such that the thickness of the film-shaped or sheet-shaped crystalline resin (B) which has passed through the cooling apparatus (40) is between 1.3 and 8.0 times the thickness of the film or sheet (C, D) after it has been press-rolled.