PURPOSE: To obtain a pulp composite sheet by applying high-concentration water columnar streams to a laminate of a nonwoven fabric of hydrophobic continuous filament and a paper sheet of pulp fiber, thereby tightly bonding the continuous fiber to the pulp fiber and forming uniform openings.
CONSTITUTION: This method for producing a pulp composite sheet is to regulate the ratio of the diameter of longitudinal ones 4 in wires of a supporting net to the hole diameter of jetting nozzles for applying high-pressure water columnar streams to 2.5-6.5, jet the high-pressure water columnar streams 1 from the side of the paper sheet during the transfer of a laminate prepared by laminating a nonwoven fabric 3 of hydrophobic continuous filament to a paper sheet 2 composed of wood pulp with the conveying supporting net composed of the wires so as to pass the water columnar streams therethrough to the side of the nonwoven fabric of the continuous filament, interlace the continuous filament with the pulp fiber of the paper sheet and form uniform openings. The resultant pulp composite sheet has excellent water feeding and wiping off properties. The nonwoven fabric of the continuous filament has preferably 5-30g/m2 basis weight and the paper sheet has preferably 10-120g/m2 basis weight measured according to a method described in JIS P 8124.
IKEZAWA HIDEO
ISHII HIROKAZU