Title:
MULTILAYER POLYESTER FILM AND COATING COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2020/255755
Kind Code:
A1
Abstract:
A multilayer polyester film according to the present invention comprises a polyester film and a resin layer (X); and at least a surface layer on one side thereof is composed of the resin layer (X). With respect to this multilayer polyester film, the surface resistivity (RX) of the resin layer (X) is from 106 Ω/□ to 1012 Ω/□, and the ratio of the surface resistivity (RY) of the resin layer (X) after having the surface of the resin layer (X) subjected to an abrasion treatment under the conditions described below to the surface resistivity (RX), namely RY/RX is 5.0 or less. Another multilayer polyester film according to the present invention comprises a polyester film and a resin layer (X); and at least a surface layer on one side thereof is composed of the resin layer (X). With respect to this multilayer polyester film, the resin layer (X) contains (A) a resin component, (B) a polystyrene sulfonic acid and/or a salt thereof, and (C) a polyhydric alcohol; and the glass transition temperature of the resin component (A) is from 40°C to 120°C (inclusive). The multilayer polyester films according to the present invention have excellent antistatic properties that are not likely to deteriorate due to abrasion during conveyance in processing steps or a surface treatment such as a corona discharge treatment. The multilayer polyester films according to the present invention are able to be used as protection films that are used for electronic components or the like, and are especially suitable for use in cover tapes.
Inventors:
IWAYA TADAHIKO (JP)
ABE YU (JP)
SAWAMOTO KEIKO (JP)
TANAKA TERUYA (JP)
TSUBOKURA SHO (JP)
ABE YU (JP)
SAWAMOTO KEIKO (JP)
TANAKA TERUYA (JP)
TSUBOKURA SHO (JP)
Application Number:
PCT/JP2020/022352
Publication Date:
December 24, 2020
Filing Date:
June 05, 2020
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B29C55/04; B29C55/12; B32B7/025; B32B27/36; C08J7/044; C08K5/053; C08L25/18; C08L71/02; C08L101/00; C09D7/63; C09D7/65; C09D133/06; C09D201/00
Foreign References:
| JP2016060771A | 2016-04-25 | |||
| JP2017087420A | 2017-05-25 | |||
| JP2017154421A | 2017-09-07 | |||
| JP2015208906A | 2015-11-24 | |||
| JP2017119778A | 2017-07-06 | |||
| JP2007297565A | 2007-11-15 |
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