Method for producing joined body of different materials and joined body of different materials

Patent metadata

Field	Value
Publication number	US-11904553-B2
Application number	US-201917256501-A
Country	US
Kind code	B2
Filing date	Sep 18, 2019
Priority date	Sep 28, 2018
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

The present invention provides a method for producing a joined body of different materials, which may easily achieve joining between a plurality of resin layers and joining between a resin and a metal, and a joined body of different materials.

First claim

The invention claimed is:

1. A method for producing a joined body comprising different materials joined together, the method comprising the steps of:
preparing a metal substrate comprising two or more etched grooves on a surface thereof and burrs provided adjacent to each of the two or more etched grooves;
sequentially placing a first resin layer and a second resin layer on the surface of the metal substrate; and
irradiating a surface of the second resin layer with a laser, thereby fusing the first and second resin layers to form a laminate,
wherein the first resin layer has a light transmittance of 20% to 70% at any one wavelength selected from a range of 800 nm to 1,100 nm,
wherein the second resin layer has a light transmittance of 50% to 80% at the any one wavelength,
wherein the surface of the metal substrate has a light reflectance of 50% or less at the any one wavelength,
wherein a light absorption rate of the first resin layer at the any one wavelength selected from a range of 800 nm to 1,100 nm is 20% to 50%, and
wherein the light transmittance of the first resin layer at the any one wavelength is lower than a light transmittance of the second resin layer at the any one wavelength.

2. The method of claim 1 , wherein the light transmittance of the first resin layer at the any one wavelength is 20% to 50%.

3. The method of claim 1 , wherein the first resin layer has a thickness of 0.1 mm to 5 mm.

4. The method of claim 1 , wherein the laser is a diode laser having an output of 50 W to 2,000 W.

5. The method of claim 1 , wherein the surface of the second resin layer is irradiated with the laser three times or less at an irradiation speed of 10 mm/s to 1,000 mm/s, and wherein the laser has a spot size of 100 μm to 5,000 μm.

Assignees

• Lg Chemical Ltd

Inventors

• Jung Jin Mi
• Min In Ki
• Jeong Yu Jin

Classifications

• B29C65/1635 Primary

  at least passing through one of the parts to be joined, i.e. laser transmission welding · CPC title

• B32B3/30 Primary

  characterised by a layer formed with recesses or projections, e.g. {hollows, grooves, protuberances, ribs (apertured layer B32B3/266; layer with cavities or internal voids B32B3/26)} · CPC title

• B32B15/085

  comprising polyolefins · CPC title

• B32B15/18

  comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)} · CPC title

• B32B27/16

  specially treated, e.g. irradiated · CPC title