Semi-finished product, method for producing a semi-finished product and use thereof

Patent metadata

Field	Value
Publication number	US-10315389-B2
Application number	US-201515529991-A
Country	US
Kind code	B2
Filing date	Nov 3, 2015
Priority date	Nov 27, 2014
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

The disclosure relates to a blank-shaped or strip-shaped semi-finished product comprising at least one first metal layer and at least one plastics layer, which are joined over their full area to one another to form a metal/plastic composite. The material thickness of the metal layer is not more than 1.5 mm. The material thickness of the plastics layer is at least 0.2 mm. A method for producing said product is also provided. One object of the present invention, of providing a semi-finished product which is significantly lighter than the semi-finished products used in the prior art, is achieved for a semi-finished product.

First claim

The invention claimed is:

1. A method for producing an at least single-side coated, blank-shaped or strip-shaped windable semi-finished product able of forming a coil, the method comprising:
joining a first metal layer and at least one plastics layer over their full area to form a wound metal/plastic composite in a strip shaped windable coil;
wherein a material thickness of the first metal layer is not more than 1.5 mm and a material thickness of the at least one plastics layer is at least 0.2 mm;
unwinding the metal/plastic composite from the windable coil; and
coating a visible surface of the metal layer of the metal/plastic composite in a coil coating process.

2. The method as claimed in claim 1 , further comprising:
arranging a second metal layer which is connected over its full area to the free surface of the plastics layer to form a metal/plastic/metal composite, wherein the visible surface of the second metal layer of the metal/plastic/metal composite is coated in a coating process.

3. The method as claimed in claim 2 , further comprising baking the metal/plastic/metal composite such that the temperature stability of the plastic is ensured, a temperature of in particular at most 220° Celsius.

4. The method as claimed in claim 2 , further comprising baking the metal/plastic/metal composite such that the temperature stability of the plastic is ensured, a temperature of in particular at most 200° Celsius.

5. The method as claimed in claim 1 , wherein the visible surface of at least one of the first and second metal layer is textured subsequent to the coil coating process.

6. The method of claim 1 wherein the metal layer is formed from a double-side metallically coated steel material.

7. The method of claim 2 wherein a material thickness of the second metal layer being not more than 1.5 mm.

8. The method of claim 7 wherein the visible surface of the second metal layer of the metal/plastic/metal composite has a coil coating.

9. The method of claim 1 wherein the at least one plastics layer is formed from a temperature-stable plastic which is temperature-stable to at least 200° C.

10. The method of claim 1 wherein the at least one plastics layer is formed from a temperature-stable plastic which is temperature-stable to at least 220° C.

11. The method of claim 1 wherein the plastic is fiber-reinforced, the fibers used being temperature-stable to at least 200° C.

12. The method of claim 11 wherein the plastic is fiber-reinforced, the fibers used being temperature-stable to at least 220° C.

13. The method of claim 1 , further comprising texturing at least one of the first and second metal layers in course of or after coil coating or after the baking.

14. The method of claim 1 further comprising applying a protective film on the at least one plastics layer to inhibit sticking to the first metal layer in a wound state; and winding the semi-finished product into a coil.

15. A method for producing an at least single-side coated, blank-shaped or strip-shaped windable semi-finished product able of forming a coil, the method comprising:
providing a strip-shaped wound coil formed of a metal/plastic composite wherein a material thickness of a metal layer is not more than 0.5 mm and a material thickness of a plastics layer is at least 0.2 mm;
unwinding the strip-shaped wound coil;
baking the metal/plastic composite such that an adhesion promoter is baked onto the metal layer of the metal/plastic composite;
further baking the metal/plastic composite such that a coil coating is applied onto the baked adhesion promoter; and
one of (i) rewinding the strip-shaped coil into the windable semi-finished product, and (ii) cutting the strip into lengths to form the blank-shaped semi-finished product.

16. The method of claim 15 wherein baking the coil coating comprises baking at a temperature which is tailored to the plastics layer in such a way as to ensure temperature stability of the plastics layer in the semi-finished product.

17. The method of claim 16 wherein baking the coil coating comprises baking the metal/plastic composite having the coil coating at a temperature not more than 220° Celsius.

18. The method of claim 16 wherein baking the coil coating comprises baking the metal/plastic composite having the coil coating at a temperature not more than 200° Celsius.

19. The method of claim 15 , further comprising:
texturing the metal layer.

20. The method of claim 19 wherein the metal layer is textured in the course of the coil coating.

Assignees

• Thyssenkrupp Steel Europe Ag
• Thyssenkrupp Ag

Inventors

• Bode Lars
• Sünkel Ralf

Classifications

• B32B2605/08

  Cars · CPC title

• B32B2605/00

  Vehicles · CPC title

• B32B2509/00

  Household appliances · CPC title

• B32B2307/718

  Weight, e.g. weight per square meter · CPC title

• B32B2307/546

  Flexural strength; Flexion stiffness · CPC title