Resin film-laminated metal sheet and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-2022203654-A1
Application number	US-202017606909-A
Country	US
Kind code	A1
Filing date	Jun 23, 2020
Priority date	Jul 5, 2019
Publication date	Jun 30, 2022
Grant date	—

Abstract

A resin film-laminated metal sheet includes a metal sheet and thermoplastic resin films that are fused to both surfaces of the metal sheet, the metal sheet is a steel sheet having a thickness of 0.08 mm or more or an aluminum sheet having a thickness of 0.15 mm or more, and, when a surface of the thermoplastic resin film opposite to a surface that is fused to the metal sheet is defined as a first surface, the surface tension on the first surface in at least one of the thermoplastic resin films is 50 mN/m or less, the surface tension on the surface that is fused to the metal sheet is 36 mN/m or more, and the amount of a wax attached to the first surface is more than 0 mg/m2 and 5.00 mg/m2 or less.

First claim

1 - 6 . (canceled)

7 . A resin film-laminated metal sheet comprising:
a metal sheet; and thermoplastic resin films that are fused to both surfaces of the metal sheet, wherein the metal sheet is a steel sheet having a thickness of 0.08 mm or more or an aluminum sheet having a thickness of 0.15 mm or more, and, when a surface of the thermoplastic resin film opposite to a surface that is fused to the metal sheet is defined as a first surface, a surface tension on the first surface in at least one of the thermoplastic resin films is 50 mN/m or less, a surface tension on the surface that is fused to the metal sheet is 36 mN/m or more, and an amount of a wax attached to the first surface is more than 0 mg/m 2 and 5.00 mg/m 2 or less.

8 . The resin film-laminated metal sheet according to claim 7 ,
wherein, when the resin film-laminated metal sheets are set on an upper surface side and a lower surface side of an injection mold, the mold is filled with a foaming raw material containing a polyisocyanate and a polyol through an injection opening on a lateral side of the mold within 30 seconds while mixing the foaming raw material, and the foaming raw material is held at a pressure of 20 kN/m 2 for approximately 30 seconds, thereby forming a foam polyurethane resin between the resin film-laminated metal sheets, an adhesion strength between the thermoplastic resin film and the metal sheet is higher than an adhesion strength between the foam polyurethane resin and the thermoplastic resin film.

9 . A method for manufacturing a resin film-laminated metal sheet that is a method for manufacturing the resin film-laminated metal sheet according to claim 7 ,
wherein, after film lamination, a wax is applied in a range of 0.1 mg/m 2 or more and 2.0 mg/m 2 or less, and then a resin film-laminated metal sheet is threaded using a threading roll having a surface tension of 36 mN/m or more on a surface of the threading roll.

10 . The method for manufacturing a resin film-laminated metal sheet according to claim 9 ,
wherein, before the threading of the resin film-laminated metal sheet, a non-lubricated steel sheet is threaded through 1000 m or more at a rate of 50 m/minute or faster without laminating a film, and then the resin film-laminated metal sheet is manufactured and threaded.

11 . A laminated panel comprising:
a core layer; and a resin film-laminated metal sheet, wherein the resin film-laminated metal sheet includes a metal sheet; and thermoplastic resin films that are fused to both surfaces of the metal sheet, the metal sheet is a steel sheet having a thickness of 0.08 mm or more or an aluminum sheet having a thickness of 0.15 mm or more, and when a surface of the thermoplastic resin film that is fused to the core layer is defined as a first surface, a surface tension on the first surface in at least one of the thermoplastic resin films is 50 mN/m or less, a surface tension on a surface that is fused to the metal sheet is 36 mN/m or more, and an amount of a wax attached to the first surface is more than 0 mg/m 2 and 5.00 mg/m 2 or less.

12 . The laminated panel according to claim 11 ,
wherein an adhesion strength between the thermoplastic resin film and the metal sheet is higher than an adhesion strength between the core layer and the thermoplastic resin film.

13 . A method for manufacturing a resin film-laminated metal sheet that is a method for manufacturing the resin film-laminated metal sheet according to claim 8 ,
wherein, after film lamination, a wax is applied in a range of 0.1 mg/m 2 or more and 2.0 mg/m 2 or less, and then a resin film-laminated metal sheet is threaded using a threading roll having a surface tension of 36 mN/m or more on a surface of the threading roll.

14 . The method for manufacturing a resin film-laminated metal sheet according to claim 13 ,
wherein, before the threading of the resin film-laminated metal sheet, a non-lubricated steel sheet is threaded through 1000 m or more at a rate of 50 m/minute or faster without laminating a film, and then the resin film-laminated metal sheet is manufactured and threaded.

Assignees

• Nippon Steel Corp

Inventors

• Kadowaki Nobuo
• IWAKIRI Kazushi
• Mizutani Tomohiro
• Yasufuku Daisuke
• Hara Tomoya
• Kato Satoshi
• TAJIMA Yuta
• Nagai Yuki

Classifications

• B32B2266/0278

  Polyurethane · CPC title

• B32B27/065

  of foam · CPC title

• B32B5/20

  foamed in situ · CPC title

• B32B5/18 Primary

  characterised by features of a layer {of} foamed material · CPC title

• B29C66/7392

  characterised by the material of at least one of the parts being a thermoplastic · CPC title