Title:
METHOD FOR SPRAYING CHEMICAL SOLUTION
Document Type and Number:
WIPO Patent Application WO/2021/235382
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method for spraying a chemical solution in which the chemical solution is applied as evenly as possible to the surface of a canvas that comes into contact with wet paper for a time Tc of not less than 0.03 seconds, while reciprocally moving a nozzle apparatus in the width direction with respect to the canvas, and which makes it possible to leave a sufficient amount of the chemical solution. The present invention provides a method for spraying a chemical solution onto a canvas (K1) that has a loop-shape in a side view while reciprocally moving, with respect to the canvas (K1), a nozzle apparatus (S) along a rail (L) that extends in the width direction of the canvas (K1), wherein: the canvas (K1) comes into contact with wet paper (X) for a time Tc of not less than 0.03 seconds; the time Tn required for the nozzle apparatus (S) to move one way is 0.5-10 minutes; the traveling velocity Vp of the canvas (K1) is not less than 500 m/minute; the length K of the canvas (K1) is 20-80 m; a contact number N which is the number of times that an arbitrary point on the surface of the canvas (K1) comes into contact with the wet paper X during the time Tn, the time Tn, the traveling velocity Vp, and the length K satisfy the relation N=(Tn·Vp)/K; the contact number N is 20-80; and the sprayed amount of the chemical solution, in terms of the active ingredient amount, is 0.1-500 mg/m2.
Inventors:
SEKIYA HIROSHI (JP)
NAGATSUKA TOMOHIKO (JP)
YUSA KAZUYUJKI (JP)
SUGA AYANO (JP)
NAGATSUKA TOMOHIKO (JP)
YUSA KAZUYUJKI (JP)
SUGA AYANO (JP)
Application Number:
PCT/JP2021/018574
Publication Date:
November 25, 2021
Filing Date:
May 17, 2021
Export Citation:
Assignee:
MAINTECH CO LTD (JP)
International Classes:
D21F1/32; B05B13/04; B05D1/02; B05D1/28; B05D7/00; D21F7/00
Domestic Patent References:
| WO2019187152A1 | 2019-10-03 | |||
| WO2016174827A1 | 2016-11-03 | |||
| WO2019189712A1 | 2019-10-03 |
Foreign References:
| JP2015193957A | 2015-11-05 | |||
| JP2005314814A | 2005-11-10 | |||
| JP2004058031A | 2004-02-26 | |||
| JP2004218186A | 2004-08-05 | |||
| JP2005314814A | 2005-11-10 |
Attorney, Agent or Firm:
SHIRASAKI Shinji (JP)
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