Granted Patent B2

US 12,420,524 · App. 17/325,436 · Granted Sep 23, 2025

Inventors: Seckin Ozol (South Bend, IN); Gregory L. Todt (Union, MI); Na Qi (Granger, IN)

Assignee: Transhield, Inc.

B32B7/12B32B5/16B32B2307/726

Abstract

Claims (43)

1. A method of making a cover, including the steps of:

providing a heat shrinkable film having an inner layer, an outer layer, and a first styrenic block copolymer incorporated into the inner layer but not the outer layer, the first styrenic block copolymer incorporated into the inner layer in an amount equal to at least 30% by weight of the inner layer but less than 50% by weight of the inner layer;

providing a composite layer;

providing an adhesive layer between the inner layer of the film and the composite layer, the adhesive layer including a second styrenic block copolymer selected from the same family as the first styrenic block copolymer; and

laminating the film to the composite layer.

2. The method according to claim 1 , further including the step of incorporating an adhesive into the film.

3. The method according to claim 1 , further including the step of perforating the composite layer prior to laminating the composite layer to the film.

4. The method according to claim 1 , wherein the film has a first side and an edge, the composite layer has a first side opposite the first side of the film and an edge, and the edge of the film and the edge of the composite layer are located between the first side of the film and the first side of the composite layer, and further including the step of providing an edge wrap and securing the edge wrap to the first side of the film and the first side of the composite layer such that the edge wrap at least partially surrounds the edge of the film and the edge of the composite layer after laminating the composite layer to the film.

5. The method according to claim 1 , wherein the film further includes one or more middle layers between the inner layer and the outer layer.

6. The method according to claim 1 , wherein the first styrenic block copolymer is an SEBS copolymer.

7. The method according to claim 1 , wherein the first styrenic block copolymer is a an SEPS copolymer.

8. The method of claim 1 , wherein the film is further constructed from a third styrenic block copolymer selected from the same family as the first styrenic block copolymer.

9. The method according to claim 8 , wherein the first styrenic block copolymer and the third styrenic block copolymer have different melting points.

10. The method according to claim 5 , wherein the first styrenic block copolymer is also incorporated into at least one of the middle layers.

11. A method of making a cover, including the steps of:

providing a heat shrinkable film having a first side, an edge, an inner layer, an outer layer, and a first styrenic block copolymer incorporated into the inner layer but not the outer layer, the first styrenic block copolymer incorporated into the inner layer in an amount equal to at least 30% by weight of the inner layer but less than 50% by weight of the inner layer;

providing a composite layer having a first side opposite the first side of the film and an edge, wherein the edge of the film and the edge of the composite layer are located between the first side of the film and the first side of the composite layer;

providing an adhesive layer between the composite layer and the one of the inner layer or the outer layer into which the first styrenic block copolymer is incorporated, the adhesive layer including a second styrenic block copolymer selected from the same family as the first styrenic block copolymer;

laminating the film to the composite layer;

providing a moisture permeable edge wrap for facilitating the migration of moisture through the edge of the film and the edge of the cover; and

securing the edge wrap to the first side of the film and the first side of the composite layer such that the edge wrap at least partially surrounds the edge of the film and the edge of the composite layer after laminating the composite layer to the film.

12. The method according to claim 11 , further including the step of incorporating an adhesive into the film.

13. The method according to claim 11 , further including the step of perforating the composite layer prior to laminating the composite layer to the film.

14. The method according to claim 11 , wherein the film further includes one or more middle layers between the inner layer and the outer layer.

15. The method according to claim 11 , wherein the first styrenic block copolymer is an SEBS copolymer.

16. The method according to claim 11 , wherein the first styrenic block copolymer is an SEPS copolymer.

17. The method of claim 11 , wherein the film is further constructed from a third styrenic block copolymer selected from the same family as the first styrenic block copolymer.

18. The method according to claim 17 , wherein the first styrenic block copolymer and the third styrenic block copolymer have different melting points.

19. The method according to claim 14 , wherein the first styrenic block copolymer is also incorporated into at least one of the middle layers.

20. A method of making a cover, including the steps of:

providing a heat shrinkable film having an inner layer, an outer layer having a polyethylene content greater than 50%, and a first styrenic block copolymer incorporated into the inner layer but not the outer layer, the first styrenic block copolymer incorporated into the inner layer in an amount equal to at least 30% by weight of the inner layer;

providing a composite layer;

providing an adhesive layer between the inner layer of the film and the composite layer, the adhesive layer including a second styrenic block copolymer selected from the same family as the first styrenic block copolymer;

laminating the film to the composite layer; and

wherein the inner layer has a content of less than 50% first styrenic block copolymer.

21. The method according to claim 20 , wherein the outer layer includes mLLDPE.

22. The method according to claim 20 , wherein the outer layer includes fmLDPE.

23. The method according to claim 20 , wherein the polyethylene content of the inner layer is greater than 50%.

24. The method according to claim 23 , wherein the inner layer includes HDPE.

25. The method according to claim 23 , wherein the inner layer includes fmLDPE.

26. The method according to claim 1 , wherein the inner layer and the outer layer are non-elastomeric.

27. The method according to claim 11 , wherein the inner layer and the outer layer are non-elastomeric.

28. The method according to claim 20 , wherein the inner layer and the outer layer are non-elastomeric.

Assignments (1)

Continuity (2)

References Cited (46)