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Title:
SLIT DIE COATER MOUTH PIECE AND PRODUCTION OF COATED FILM USING SAME
Document Type and Number:
Japanese Patent JPH08173878
Kind Code:
A
Abstract:

PURPOSE: To improve a uniformity and reproducibility of a film thickness and to suppress a generation of a coated film stripe due to a flocculation and deposition of a pigment by enlarging a contact angle of a manifold and/or a land part 5 of a slit 3 to the water than that of a lip tip part.

CONSTITUTION: A magnitude of a surface energy is defined with a contact angle to water. That is, when the contact angle to the water is larger, it indicates that the surface energy is smaller. By the way, when a paint 7 is mainly composed of a polymer, a pigment and a solvent, the pigment is allowed to flocculate and deposit and a stripe is allowed to sometimes generate at a coated film by a shearing force at the land part 5 where a gap is narrow as several tens μm. The use of a material low in surface energy is effective to suppress the deposition of this pigment on the surface of the land part 5. Thereby, the surface energy is lowered by making the contact angle of a manifold 4 and/or the land part 5 of the slit 3 to the water larger than that of the lip tip parts 6a and 6b being a contact surface of the paint.


Inventors:
Akamatsu, Takayoshi
Goto, Tetsuya
Suzuki, Tetsuo
Ido, Hideo
Application Number:
JP1994000322975
Publication Date:
July 09, 1996
Filing Date:
December 26, 1994
Export Citation:
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Assignee:
TORAY IND INC
International Classes:
B05D1/26; B05C5/02; B05D5/06; B05D7/24; (IPC1-7): B05C5/02; B05D1/26; B05D5/06; B05D7/24



 
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