To provide a belt type continuous sheet making apparatus for manufacturing a sheet polymer having extremely high thickness precision in its longitudinal direction, and a method using the apparatus.
In the belt type continuous sheet making apparatus constituted so that a polymerizable raw material is supplied to the space, which is surrounded by the opposed belt surfaces of two endless belts 1 and 1' opposed to each other and the gaskets 7 provided to both side parts of the belts and held between the belt surfaces, from one end of the space and solidified in a heating zone along with the traveling of the belts and the sheet polymer is taken out from the other end of the space, three or more pairs of upper and lower rolls, which satisfy formula (1): D/Z ≥ 0.04 and formula (2): 0.30 ≤ D/X ≤ 0.99 [wherein D is the outermost diameter (mm) of the body part of the roll, Z is the width (mm) of the body part of the roll and X is the axial center-to-center distance (mm) between the upper and lower rolls mutually adjacent to each other] are arranged between a raw material supply position and a heating start position so that the respective axes of the rolls cross the traveling direction of the belts at a right angle.
MIZOTA HIROTOSHI
Nobuyuki Kaneda
Katsuhiro Ito
Ishibashi Masayuki
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