Resin-coated metal sheet for containers and method for manufacturing the same
US-9993998-B2 · Jun 12, 2018 · US
Resin-coated metal sheet for can lids
US10399303B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10399303-B2 |
| Application number | US-201515532443-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 8, 2015 |
| Priority date | Dec 12, 2014 |
| Publication date | Sep 3, 2019 |
| Grant date | Sep 3, 2019 |
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- Title
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Abstract
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A resin-coated metal sheet for can lids includes a metal sheet coated with thermoplastic resin films on both surfaces and formed into a can lid. A thermoplastic resin film A based on polybutylene terephthalate (PBT) and polyethylene terephthalate (PET) is heat-fused on a surface of the metal sheet serving as an exterior surface of the can lid, and a thermoplastic resin film B based on polyethylene terephthalate (PET) is heat-fused on a surface of the metal sheet serving as an interior surface of the can lid. A composition ratio (wt %) of PBT/PET in the thermoplastic resin film A on the exterior surface is (PBT/PET)=(40/60) to (80/20), and the thermoplastic resin film B on the interior surface includes 95 mol % or more of PET.
First claim
Opening claim text (preview).
The invention claimed is: 1. A resin-coated metal sheet for can lids, the resin-coated metal sheet comprising a metal sheet coated with thermoplastic resin films on both surfaces and formed into a can lid, wherein a thermoplastic resin film A based on polybutylene terephthalate (PBT) and polyethylene terephthalate (PET) is heat-fused on a surface of the metal sheet serving as an exterior surface of the can lid, and a thermoplastic resin film B based on polyethylene terephthalate (PET) is heat-fused on a surface of the metal sheet serving as an interior surface of the can lid, a composition ratio (wt %) of PBT/PET in the thermoplastic resin film A on the exterior surface is (PBT/PET)=(40/60) to (80/20), and the thermoplastic resin film B on the interior surface includes 95 mol % or more of PET, a melting point derived from PET of the thermoplastic resin film B on the interior surface is 250° C. or higher and 265° C. or lower and is higher than a melting point derived from PBT in the thermoplastic resin film A on the exterior surface by 25° C. or more, in the thermoplastic resin film A on the exterior surface, a Raman band intensity ratio (I 90 /I 0 ) between Raman band intensity (I 0 ) of 1615±10 cm −1 that is measured on a polarization plane horizontal to the surface by laser Raman spectroscopy and Raman band intensity (I 90 ) of 1615±10 cm −1 that is measured on a polarization plane vertical to the surface by laser Raman spectroscopy is 0.60 or more, and in the thermoplastic resin film B on the interior surface, half-width of Raman band of 1730±10 cm −1 that is measured on a polarization plane horizontal to the surface by laser Raman spectroscopy is 15 to 20 cm −1 .
Assignees
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Classifications
of curved cross-section, e.g. cans of circular or elliptical cross-section · CPC title
using fillers, pigments, thixotroping agents · CPC title
Coverings or external coatings (of containers made by folding or erecting blanks made of paper B65D5/62; covering or external coating for bottles or jars not otherwise provided for B65D23/08; wrappers B65D65/00) · CPC title
- B32B15/09Primary
comprising polyesters · CPC title
for containers · CPC title
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Frequently asked questions
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- What does patent US10399303B2 cover?
- A resin-coated metal sheet for can lids includes a metal sheet coated with thermoplastic resin films on both surfaces and formed into a can lid. A thermoplastic resin film A based on polybutylene terephthalate (PBT) and polyethylene terephthalate (PET) is heat-fused on a surface of the metal sheet serving as an exterior surface of the can lid, and a thermoplastic resin film B based on polyethyl…
- Who is the assignee on this patent?
- Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification B32B15/09. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Sep 03 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).