(19) & (11) EP 2 042 637 A1 (12) EUROPEAN PATENT APPLICATION published in accordance with Art. 153(4) EPC (43) Date of publication: (51) Int Cl.: 01.04.2009 Bulletin 2009/14 D06B 1/12 (2006.01) B05C 1/02 (2006.01) B05D 1/28 (2006.01) B05D 7/00 (2006.01) (2006.01) (21) Application number: 07744664.9 D06M 15/00 (22) Date of filing: 04.06.2007 (86) International application number: PCT/JP2007/061305 (87) International publication number: WO 2007/145095 (21.12.2007 Gazette 2007/51) (84) Designated Contracting States: • T.F.C., Inc. AT BE BG CH CY CZ DE DK EE ES FI FR GB GR Osaka-shi HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE Osaka 541-0052 (JP) SI SK TR Designated Extension States: (72) Inventor: GOTO, Masatomi AL BA HR MK RS Kyoto-shi, Kyoto 601-8335 (JP) (30) Priority: 16.06.2006 JP 2006166793 (74) Representative: Gritschneder, Martin et al 04.10.2006 JP 2006272382 Abitz & Partner - Patentanwälte Hörselbergstrasse, 5 (71) Applicants: 81628 München (DE) • Hiramatsu Sangyo Company Nomi-shi Ibaraki 929-0124 (JP) (54) DOCTOR BLADE FOR USE IN RESIN FINISHING ON CLOTH AND METHOD OF RESIN FINISHING THEREWITH (57) A new doctor blade by which resin finishing can the blade tip side to the blade body side, the lower portion be stably applied to such a thin cloth having a weight 120 3 of the blade 1 in a width of 2-12 cm being bent to make g/m2 or less is provided. The doctor blade has a lower an angle of 110-160 degrees to the blade body (upper portion bent to form an inclined surface so as to supply portion 4). The tip portion 5 of the lower portion 3 of the a resin composition on the inclined surface of the blade blade 1 may be bent backward in a width of 3-10 mm at and to coat the resin composition on a cloth moving from an angle of 50-150 degrees to the lower portion 3 of the blade. EP 2 042 637 A1 Printed by Jouve, 75001 PARIS (FR) 1 EP 2 042 637 A1 2 Description a thin cloth having a weight of 120 g/m 2 or less, particu- larly 60 g/m2 or less. TECHNICAL FIELD MEANS T0 SOLVING THE PROBLEMS [0001] The present invention relates to a doctor blade 5 by which resin finishing can be effectively applied to only [0006] The present inventor has studied various surface of a cloth and relates to a method for resin fin- shapes of a doctor blade, and found that, by making a ishing with use of it. doctor blade to have a special shape, a resin finish is surely applied to a surface of very thin cloths without BACKGROUND 10 squeezing through the used resin to the back surface. In the result the above problems have been dissolved. [0002] Various methods for providing water repellency [0007] Namely a doctor blade according to the present and water absorbability to only one surface of a cloth invention and a coating method (resin finishing method) have been tried. For example, Pat. Document 1 de- with use of the doctor blade are as follows. scribes a method for producing a partial water absorbent 15 woven or knitted fabric for inner wears in which the front (1) A doctor blade has a lower portion bent to form surface has water repellency but the back surface has an inclined surface so as to supply a resin composi- water absorbability, by applying a water repellent only to tion on the inclined surface of the blade and to coat one surface of the woven or knitted fabric. Examples of the resin composition on a cloth moving from the it disclose that a water repellent is applied to an interlock 20 blade tip side to the blade body side. The lower por- knitted fabric having a weight of 230 g/m2 by spraying tion of the blade in a width of 2-12 cm is bent to make method and that a water repellent is coated on a plain an angle of 110-160 degrees to the blade body. weave fabric of 100% polyester finished yarn having a weight of 250 g/m2 by a reverse-roll coater. (2) In the doctor blade of the above (1), the tip having [0003] Pat. Document 2 discloses, as a method for ap- 25 3-10 mm width of the lower portion of the blade is plying water absorbability to only one surface of a cloth, bent backward at an angle of 50-150 degrees to the that a water absorbing agent is roller- printed on an inter- lower portion of the blade. lock knitted fabric of polyester finished yarn having a weight of 200 g/m2 in Example 1, and that a 3% solution (3) A method for resin finishing, in which a resin com- of a water repellent is coated on a plain weave fabric of 30 position composed of an aqueous emulsion is ap- a blended yarn of polyester and cotton having a weight plied to only the surface of the used cloth by a floating of 240 g/m2 in Example 2. knife coater, is carried out by using a doctor blade [0004] Further, Pat. Document 3 discloses a water re- in the above (1) or (2). pellent is roller-printed on one surface of a cloth to apply water repellency only to the convex surface portion, and 35 (4) In the method for resin finishing of the above (3), in Examples, a sheeting knitted fabric of 100% cotton the cloth is a woven fabric, knitted fabric or non- wo- having a weight of 130 g/m 2 and a sheeting knitted fabric ven fabric having water absorbability, and the resin of a blended yarn of cotton and polyester having a weight composition has a viscosity of 6000 cps or more of 140 g/m2 are used. Pat. Document 4 discloses that a (preferably 12000 cps or more, more preferably water repellent is applied to one surface of a cloth by a 40 15000 cps or more). floating knife coater. However, as illustrated in Figures, the used doctor blade is merely usual plain board, by (5) In the method for resin finishing of the above (4), which the coated resin is squeezed through to the back the resin composition is composed of a water repel- surface and accordingly it is difficult to apply a resin finish lent. to only one surface. 45 (6) In the method for resin finishing of the above (3), [Pat. Document 1] JP S56-144272 A the cloth is a woven fabric, knitted fabric or non- wo- [Pat. Document 2] JP S58-220873 A ven fabric poor in water absorbability, and the resin [Pat. Document 3] JP H01-53394 A composition has a viscosity of 3000-6000 cps (pref- [Pat. Document 4] JP 2004-523673 A 50 erably 3500-5000 cps). DISCLOSURE OF THE INVENTION (7) In the method for resin finishing of the above (6), the cloth is a water repellent finished cloth, and the PROBLEMS TO BE S0LVED IN THE INVENTION resin composition is that for waterproof coating. 55 [0005] An object of the invention is to provide a new (8) In the method for resin finishing of anyone of the doctor blade and a new resin coating method, in which above (3)-(7), the cloth is a thin cloth having a weight a resin finish is surely applied to only one surface of such of less than 130 g/m2. 2 3 EP 2 042 637 A1 4 (9) In the method for resin finishing of the above 3, is preferably 15000 cps or more. As the woven, knitted the resin composition is coated on a surface of the or non-woven fabric having water absorbability, for ex- cloth moving it upward inclined. ample, a cloth of fibers having naturally water absorba- bility, such as cellulose fibers, may be used, but a cloth (10) A resin-finished cloth, in which one surface has 5 of fibers poor in water absorbability may be used after water repellency and the other surface has water treating it by water absorbent to give water absorbability. absorbability, is obtained by applying a water repel- [0013] In the case, any resin compositions may be lent to one surface of a water absorbing cloth having used, but those comprising water repellent such as sili- a weight of less than 130 g/m2 with the method of cone compounds, fluoride compounds and the like can the above (3). 10 be very effectively used. [0014] When the used cloth is a woven, knitted or non- (11) A resin- finishedcloth, in which the front and back woven fabric poor in water absorbability which comprises surfaces have water repellency and the middle layer a synthetic fiber, the preferable viscosity of the resin com- has water absorbability, is obtained by applying a position is 3000-5000 cps. Further, a cloth having water water repellent to the front and back surfaces of a 15 absorbability is treated by water repellent and then may water absorbing cloth having a weight of 100-450 be used. In the case, the pretreated cloth is effectively g/m2 with the method of the above (3). used to coat a resin composition for water proof on one surface of it. [0008] Doctor blades of the present invention may [0015] The invention may be effectively applied to such have a width and a length similar to those used in con- 20 a thin cloth as having a weight of less than 130 g/m2, ventional coating method.