Two shot molding with isosorbide based polycarbonate

Patent metadata

Field	Value
Publication number	US-12076970-B2
Application number	US-202218056377-A
Country	US
Kind code	B2
Filing date	Nov 17, 2022
Priority date	Nov 17, 2022
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

A vehicle trim component, a vehicle including a vehicle trim component, and method of making a vehicle trim component. The vehicle trim component includes a substrate including a first polymer. The substrate includes a first surface, and the first polymer includes bisphenol-A based polycarbonate. The vehicle trim component also includes an exterior layer including a second polymer. The second polymer includes isosorbide-based polycarbonate. The exterior layer includes an exterior surface, and the exterior layer is laminated to the first surface of the substrate.

First claim

The invention claimed is:

1. A vehicle trim component, comprising:
a substrate comprising a first polymer, the substrate including a first surface and the first polymer includes bisphenol-A based polycarbonate; and
an exterior layer comprising a second polymer, wherein the second polymer includes isosorbide-based polycarbonate, the exterior layer includes an exterior surface,
a rear surface, and a periphery defined by the rear surface, and the exterior layer is laminated to the first surface of the substrate, wherein one or more gates for molding the exterior layer is formed along the rear surface spaced away from the periphery.

2. The vehicle trim component of claim 1 , wherein the exterior surface is a Class-A surface.

3. The vehicle trim component of claim 1 , wherein the first polymer is a blend of bisphenol-A polycarbonate and acrylonitrile butadiene styrene, and the first polymer exhibits a density in the range of 1 g/cm 3 to 1.15 g/cm 3 and a Vicat softening point in the range of 100° C. to 140° C.

4. The vehicle trim component of claim 1 , wherein the first polymer exhibits a first hardness and the second polymer exhibits a second hardness, and the second hardness is greater than the first hardness.

5. The vehicle trim component of claim 4 , wherein the substrate exhibits a first thickness, and the exterior layer exhibits a second thickness, and the second thickness is less than the first thickness.

6. The vehicle trim component of claim 4 , wherein an adhesive is not present between the substrate and the exterior layer.

7. The vehicle trim component of claim 4 , wherein the exterior layer includes a colorant.

8. The vehicle trim component of claim 7 , wherein the exterior layer does not include paint on the exterior surface.

9. The vehicle trim component of claim 4 , wherein the vehicle trim component is an interior trim component.

10. The vehicle trim component of claim 9 , wherein the interior trim component is selected from the group consisting of: instrument panel cluster, internal control systems, gear shift panel, and interior door trim.

11. The vehicle trim component of claim 3 , wherein the vehicle trim component is an exterior vehicle trim component.

12. The vehicle trim component of claim 11 , wherein the exterior vehicle trim component is selected from the group consisting of: grill, exterior door trim, and mirror trim.

13. A vehicle comprising:
a vehicle trim component, including:
a substrate including a first polymer, wherein the first polymer includes a blend of bisphenol-A based polycarbonate and acrylonitrile butadiene styrene, wherein the first polymer exhibits a density in the range of 1 gram per cubic centimeter to 1.15 grams per cubic centimeter and a Vicat softening point in the range of 100° C. to 140° C., and the substrate includes a first surface; and
an exterior layer including a second polymer, wherein the second polymer is isosorbide-based polycarbonate, and the exterior layer is laminated to the first surface of the substrate, wherein the exterior layer includes an exterior surface, a rear surface, and a periphery defined by the rear surface, and one or more gates for molding the exterior layer is formed along the rear surface spaced away from the periphery.

14. The vehicle of claim 13 , wherein the substrate exhibits a first thickness and the exterior layer exhibits a second thickness, wherein the second thickness is less than the first thickness; and the substrate exhibits a first hardness and the exterior layer exhibits a second hardness, wherein the first hardness is less than the second hardness.

15. The vehicle of claim 14 , wherein the exterior layer includes a colorant.

16. The vehicle of claim 15 , wherein the vehicle trim component is on the exterior of the vehicle.

17. The vehicle of claim 15 , wherein the vehicle trim component is in the interior of the vehicle.

18. A method of forming a vehicle trim component, comprising:
molding a substrate from a first polymer, wherein the substrate includes a first surface and the first polymer includes a blend of bisphenol-A based polycarbonate and acrylonitrile butadiene styrene, wherein the first polymer exhibits a density in the range of 1 gram per cubic centimeter to 1.15 grams per cubic centimeter and a Vicat softening point in the range of 100° C. to 140° C.; and
molding an exterior layer of a second polymer, wherein the exterior layer includes an exterior surface, a rear surface, and a periphery defined by the rear surface, and the first surface of the substrate is laminated to the rear surface of the exterior layer, wherein the second polymer includes isosorbide-based polycarbonate polymer and wherein one or more gates for molding the exterior layer is formed along the rear surface spaced away from the periphery.

19. The vehicle trim component of claim 1 , wherein at least one of the first polymer and the second polymer includes an additive selected from the group consisting of mineral and glass.

20. The vehicle trim component of claim 1 , wherein a gate for molding the second polymer is located at an edge.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Bae Woo-Sung
• Tice Bradley J
• Larouche Guy D

Classifications

• B32B2605/00

  Vehicles · CPC title

• B32B2307/536

  Hardness · CPC title

• B29K2995/007

  Hardness · CPC title

• B29K2069/00

  Use of PC, i.e. polycarbonates {or derivatives thereof}, as moulding material · CPC title

• B29L2031/3005

  Body finishings · CPC title