Laminated steel having extremely low interface bubble rate and method for manufacturing same
US11760064B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2018 |
| Grant date | Sep 19, 2023 |
| Priority date | — |
| Expiry date | Jan 3, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Laminated steel having a low interface bubble rate, comprising: a substrate with a surface roughness of 0.15-0.25 μm and a modified flexible polyester film thermally laminated onto the surface of the substrate. The modified flexible polyester film is obtained by copolymerization modification of ethylene terephthalate with a low-molecular-weight aliphatic polyester. A method for manufacturing the laminated steel having an extremely low interface bubble rate, comprising the steps of: (1) preheating and then heating the substrate; (2) uncoiling the modified flexible polyester film at room temperature, and then thermally laminating same onto the substrate; and (3) cooling and squeeze-drying. The laminated steel having a low interface bubble rate is made of the substrate with a low surface roughness and the modified flexible polyester thermally laminated onto the surface of the substrate, so that the laminated steel has the low interface bubble rate, high product surface quality, excellent adhesion property, and is applicable for forming into deep-drawn containers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.