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1. (WO2014208183) METHOD FOR MANUFACTURING ELECTROMAGNETIC-WAVE-SHIELDING FILM

Pub. No.:    WO/2014/208183    International Application No.:    PCT/JP2014/060960
Publication Date: Thu Jan 01 00:59:59 CET 2015 International Filing Date: Fri Apr 18 01:59:59 CEST 2014
IPC: H05K 9/00
B05D 1/26
B05C 5/00
Applicants: KONICA MINOLTA, INC.
コニカミノルタ株式会社
Inventors: KAWABE, Shigetoshi
川邉 茂寿
SAITO, Atsushi
齋藤 篤志
Title: METHOD FOR MANUFACTURING ELECTROMAGNETIC-WAVE-SHIELDING FILM
Abstract:
[Problem] To provide a method for manufacturing an electromagnetic-wave-shielding film allowing good simultaneous layered application even when the number of layers is increased. [Solution] A method for manufacturing an electromagnetic-wave-shielding film having a structure in which high-refractive-index layers and low-refractive-index layers are alternatingly layered, wherein the method has a coating step in which a coating layer of a first coating liquid (L1) that constitutes a high-refractive-index layer and a coating layer of a second coating liquid (L2) that constitutes a low-refractive-index layer are layered in alternating fashion using a slide-type die coater having a plurality of layered bars (40), so that a film substrate is simultaneously coated with the layers. The bars (40) have: a tip section (56) that forms a gap (58) with adjacent other bars (40); a base section (50) that contacts other bars (4); and a pocket section (53) positioned between the tip section (56) and the base section (50), and having a recessed section (54) that is a coating-fluid reservoir section. The thickness (D4) of the pocket section (53) is no more than 15 mm, and during the coating step, the difference in pressure (ΔP) between the inner pressure (P2) of the recessed section (54) of the pocket section (53) of the bar (40) to which the second coating fluid (L(2) is supplied and the inner pressure (P1) of the recessed section (54) of the pocket section (53) of the bar (40) to which the first coating fluid (L(1) is supplied is set so as to be no greater than 0.1 MPa.