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Patent Searching and Data


Title:
METHOD FOR PRODUCING DRAW-IRONED CANS, AND DRAW-IRONED CANS
Document Type and Number:
WIPO Patent Application WO/2022/158593
Kind Code:
A1
Abstract:
The present invention provides a method for producing draw-ironed cans by carrying out a drawing-ironing process on a coated metal sheet that has at least an interior coating film on the surface that will become the interior surface of the can, wherein a suppression of the generation of coating film defects during forming and a suppression of coating film exfoliation caused by post-forming heat treatment can be achieved even in the case of use of a coated metal sheet that has a coating film for which the main component is a polyester resin having a high glass transition temperature and an excellent flavor sorption resistance. The present invention achieves this by having the polyester resin contained in the interior surface coating film have a glass transition temperature (Tg) of at least 55°C, having the ironing ratio in the drawing-ironing process be at least 40%, and having the processing rate during the ironing process in the drawing-ironing process be at least 2,000 mm/sec.

Inventors:
KASHIWAKURA TAKUYA (JP)
YAMAMOTO HIROMI (JP)
SAKURAGI ARATA (JP)
ZHANG NAN (JP)
Application Number:
PCT/JP2022/002425
Publication Date:
July 28, 2022
Filing Date:
January 24, 2022
Export Citation:
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Assignee:
TOYO SEIKAN GROUP HOLDINGS LTD (JP)
International Classes:
B05D7/14; B05D3/12; B05D7/24; B21D22/20; B21D22/28; B21D51/18; B21D51/26; B32B1/02; B32B7/027; B32B15/09; B32B27/26; B32B27/36; B32B27/42; B65D1/00; B65D1/16; C09D161/06; C09D161/20; C09D167/00
Domestic Patent References:
WO2016186138A12016-11-24
WO2017033791A12017-03-02
Foreign References:
JP2003034322A2003-02-04
JP2015089643A2015-05-11
JP2019131275A2019-08-08
JP2002307604A2002-10-23
JP2020142253A2020-09-10
Attorney, Agent or Firm:
ONO, Hisazumi et al. (JP)
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