Vehicle door module
A vehicle door module includes a unitary frame and areas circumscribed by the unitary frame wherein the circumscribed areas are filled with a material comprising a closed cell polymeric foam. The vehicle door module can be made by overmolding or compression molding.
1. A vehicle door module comprising a unitary frame and areas circumscribed by the unitary frame wherein the circumscribed areas are filled with a material comprising a closed cell polymeric foam; and
further comprising a perimeter seal.
2. The vehicle door module of claim 1 , wherein the unitary frame comprises polypropylene and glass fiber.
3. The vehicle door module of claim 1 , wherein the glass fiber is present in an amount of 25 to 40 weight percent, based on the total weight of the unitary frame.
4. The vehicle door module of claim 1 , wherein the closed cell polymeric foam comprises a thermoplastic elastomer.
5. The vehicle door module of claim 1 , wherein the closed cell polymeric foam comprises a urethane foam.
6. The vehicle door module of claim 1 , wherein the perimeter seal comprises the same closed cell polymeric foam as the circumscribed areas.
7. The vehicle door module of claim 1 , further comprising foam bridges connecting the circumscribed areas filled with the material comprising a closed cell polymeric foam.
8. The vehicle door module of claim 1 , further comprising an adhesive disposed between a portion of the unitary frame and a portion of the closed cell polymeric foam.
9. The vehicle door module of claim 1 , wherein the circumscribed areas are filled with a material consisting essentially of a closed cell polymeric foam.
10. A method of making a vehicle door module comprising overmolding a unitary frame having open circumscribed areas with a closed cell polymeric foam to fill the circumscribed open areas with the closed cell polymeric foam; and
providing a perimeter seal.
11. The method of claim 10 , wherein the unitary frame comprises polypropylene and glass fiber and the closed cell polymer foam comprises a thermoplastic elastomer.
12. The method of claim 10 , further comprising surface treating the unitary frame prior to overmolding.
13. The method of claim 10 , wherein the unitary frame is formed and overmolded in a single tool.
14. The method of claim 10 , wherein the unitary frame comprises polypropylene and glass fiber.
15. The method of claim 10 , wherein the polymeric closed cell foam comprises a thermoplastic elastomer.
16. The method of claim 10 , wherein the closed cell polymeric foam comprises a urethane foam.
17. A method of making a vehicle door module comprises overmolding a closed cell polymeric foam with a unitary frame having circumscribed areas to produce a unitary frame having circumscribed areas filled with the polymeric closed cell foam; and
providing a perimeter seal.
18. The method of claim 17 , wherein the unitary frame comprises polypropylene and glass fiber and the closed cell polymeric foam comprises a thermoplastic elastomer.
19. The method of claim 17 , wherein the closed cell polymeric foam is formed and overmolded in a single tool.