Title:
WET FILM LAMINATED SHEET AND ABRASIVE PAD USING THE SAME
Document Type and Number:
Japanese Patent JP3723897
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a wet film laminated sheet that is a laminated film manufactured by laminating a urethane porous layer to a polyester film and in which high surface accuracy is obtained without a process in which the urethane film is peeled once from the polyester film and is stuck to another polyester film, and an abrasive pad using it.
SOLUTION: On at least one surface of a longitudinally oriented film of a polyester in which 70 mol% or more of an acid component consists of terephthalic acid and/or naphthalene dicarboxylic acid, a readily adhesive aqueous coating liquid comprising 99-80 wt.% of a polyester resin having a second order transition temperature of 20-150°C and 1-20 wt.% of a fine particle having a mean particle diameter of 0.01-0.1 μm is applied so as to form a final coating thickness of 0.005-0.03 μm. The coated polyester film is dried and oriented transversely, then reoriented in the longitudinal direction and reoriented transversely, if necessary, and then is set by heating. On the coated surface of the resultant polyester film having a coefficient of friction of 0.42-0.44, the urethane porous layer is formed by a wet coagulation method to form the wet film laminated sheet.
Inventors:
Koji Katayama
Application Number:
JP2002188539A
Publication Date:
December 07, 2005
Filing Date:
June 27, 2002
Export Citation:
Assignee:
Toray Cortex Co., Ltd.
International Classes:
B24D11/00; B32B5/18; B32B27/36; C08J5/14; C08J7/04; H01L21/304; (IPC1-7): C08J7/04; B24D11/00; B32B27/36; C08J5/14
Domestic Patent References:
| JP7041584A |
Foreign References:
| WO2002043921A1 |
Attorney, Agent or Firm:
Tamako Tsutada
Masato Tsuda
Masato Tsuda