Nail packs made of composites having high compressive strength and flexural modules

• US 5,547,325 A
• Filed: 02/18/1994
• Issued: 08/20/1996
• Est. Priority Date: 02/18/1994
• Status: Expired due to Term

• Current Assignee: Utility Composites International Limited
• Original Assignee: Utility Composites International Limited
• Inventors: Tucker, Pamela S., Showers, Nancy
• Primary Examiner(s): Wilson, Neill R.
• Application Number:
  US08/198,845
• Time in Patent Office: 914 Days
• Field of Search: 411/442, 411/443, 411/444, 411/446, 411/908, 206/343, 206/345, 470/34
• US Class Current: 411/442
• CPC Class Codes: B29C 70/12 using fibres of short length, e.g. in the form of a mat non-woven fabrics per se D04H1/00
• CPC Class Codes: B29K 2995/0077 Yield strength; Tensile strength
• CPC Class Codes: B29K 2995/0082 Flexural strength; Flexion stiffness
• CPC Class Codes: F16B 15/0015 Staples
• CPC Class Codes: F16B 15/08 formed in integral series but easily separable
• CPC Class Codes: Y10S 411/908 Resinous material
• CPC Class Codes: Y10S 411/92 Staple

Abstract

A continuous nail pack made of ultra-high strength plastic composite materials, for example, thermoplastic or thermoset materials for use in standard nailing machines. The individual nails have sufficient compressive strength and a flexural modulus such that the nail may be used for nailing into commodity woods for construction, furniture making, or for building boats. Further, this nail pack is non-corrodible and provides plastic nails having a length/diameter ratio of a working nail heretofore unavailable.

Claims

1. A plastic nail pack mountable in an automatic nailer and comprising nails made from a plastic composite having a compression strength greater than about 20,000 psi and a flexural modulus greater than about 1.2×

10⁶ psi

wherein nails from said nail pack, when having a L/d ratio of about 25.5±

0.5 and driven by an industry standard tool designed for 15 gauge metal finish nails, completely penetrate white pine and yellow pine and at least partially penetrate oak.

2. The nail pack of claim 1 wherein each nail has an L/d ratio up to about 24.

3. The nail pack of claim 1 wherein each nail has an L/d ratio from about 24 to about 38.

4. The nail pack of claim 1 wherein the plastic composite has a compression strength greater than about 25,000 psi and a flexural modulus greater than about 1.6×

10⁶ psi.

5. The nail pack of claim 1 wherein the plastic composite has a compression strength greater than about 30,000 psi and a flexural modulus greater than about 1.9×

10⁶ psi.

6. The nail pack of claim 1 wherein each nail has a width of about 1/16 inch and a length greater than 1 inch.

7. The nail pack of claim 1 wherein each nail is driveable through a commodity wood by an automatic nailer without deformation or breakage.

8. The nail pack of claim 7 wherein the commodity wood is pine, chip board, oak, maple, cedar, redwood or cherry.

9. The nail pack of claim 1 wherein the plastic composite comprises a thermoset material.

10. The nail pack of claim 9 wherein the composite thermoset material is a reinforced phenolic compound, urea or melamine formaldehyde, furan resin, polyester, epoxy, polyurethane, polyisocyanurate, polyimide or polybenzimidazole.

11. The nail pack of claim 1 wherein the plastic composite comprises a thermoplastic material.

12. The nail pack of claim 11 wherein the composite thermoplastic material is fiber-filled polyphthalamide, polyphenylene sulfide, polyetherimide, or polyamide-imide.

13. The nail pack of claim 11 wherein the composite thermoplastic material is fiber-filled polyphthalamide.

14. The nail pack of claim 11 wherein the thermoplastic material is polyphenylene sulfide.

15. The nail pack of claim 11 wherein the thermoplastic material is polyetherimide or polyamide-imide.

16. The nail pack of claim 13 wherein the fiber-filled polyphthalamide comprises at least two recurring units selected from the group consisting of terephthalamide units, isophthalamide units and adipamide units.

17. The nail pack of claim 13 wherein the fiber-filled polyphthalamide comprises about 10 to about 200 parts by weight reinforcing fibers per hundred parts by weight of polyphthalamide component.

18. The nail pack of claim 17 wherein the reinforcing fibers are glass, graphite, boron, ceramic or aramid fibers.

19. The nail pack of claim 17 wherein the reinforcing fibers are glass fibers.

20. A plastic nail pack mountable in an automatic nailer and comprising fiber-filled polyphthalamide nails, the fiber-filled polyphthalamide having a compression strength greater than about 20,000 psi and a flexural modulus greater than about 1.2×

10⁶ psi.

21. The nail pack of claim 20 wherein each nail is driveable through a commodity wood by an automatic nailer without deformation or breakage.

22. The nail pack of claim 20 wherein each nail has a diameter of about 1/16 inch and a length greater than 1 inch.

23. A plastic nail pack mountable in an automatic nailer and comprising polyphenylene sulfide composite nails, each nail having an L/d ratio from about 24 to about 36, and the polyphenylene sulfide composite having a compression strength greater than about 20,000 psi and a flexural modulus greater than about 1.2×

10⁶ psi.

24. The nail pack of claim 23 wherein each nail is driveable through a commodity wood by an automatic nailer without deformation or breakage.

25. The nail pack of claim 23 wherein each nail has a diameter of about 1/16 inch and a length greater than 1 inch.

26. A plastic nail pack mountable in an automatic nailer made by a process comprising the steps of:

selecting a plastic composite having a compression strength greater than 20,000 psi and a flexural modulus greater than about 1.2×

10⁶ psi; and

molding the plastic composite into a continuous pack

wherein nails from said nail pack, when having a L/d ratio of about 25.5±

0.5 and driven by an industry standard tool designed for 15 gauge metal finish nails, completely penetrate white pine and yellow pine and at least partially penetrate oak.

27. A method of making a plastic nail pack mountable in an automatic nailer comprising the steps of:

selecting a plastic composite having a compression strength greater than about 20,000 psi and a flexural modulus greater than about 1.2×

10⁶ psi; and

molding the plastic composite into a nail pack

wherein nails from said nail pack, when having a L/d ratio of about 25.5±

0.5 and driven by an industry standard tool designed for 15 gauge metal finish nails, completely penetrate white pine and yellow pine and at least partially penetrate oak.

28. A nail formed of a plastic composite having a compression strength greater than about 20,000 psi and a flexural modulus greater than about 1.2×

10⁶ psi

wherein said nail, when having a L/d ratio of about 25.5±

0.5 and driven by an industry standard tool designed for 15 gauge metal finish nails, completely penetrates white pine and yellow pine and at least partially penetrate oak.

29. The nail of claim 28 wherein the plastic composite, is a composite thermoplastic or thermoset material.

30. The nail of claim 29 wherein the thermoplastic material is a fiber-filled polypthalamide material.

31. A method of attaching nail penetrable construction materials, the method comprising the steps of:

obtaining nail penetrable construction materials;

mounting a nail pack in an automatic nailer, the nail pack comprising nails made from a plastic composite, having a compression strength greater than about 20,000 psi and a flexural modulus greater than about 1.2×

10⁶ psi; and

driving a nail from the pack through the materials to be attached

wherein nails from said nail pack, when having a L/d ratio of about 25.5×

0.5 and driven by an industry standard tool designed for 15 gauge metal finish nails, completely penetrate white pine and yellow pine and at least partially penetrate oak.

32. The method of claim 31 wherein the nail penetrable construction material is a commodity wood or plaster board.

33. The method of claim 31 wherein the plastic composite is a thermoplastic material.

34. The method of claim 33 wherein the thermoplastic material is a fiber-filled polyphthalamide material.

35. A plastic nail pack mountable in an automatic nailer comprising nails having an L/d ratio of less than about 38, the nails made from a plastic composite having a compression strength greater than about 20,000 psi and a flexural modulus greater than about 1.2×

10⁶ psi

wherein nails from said nail pack, when having a L/d ratio of about 25.5±

0.5 and driven by an industry standard tool designed for 15 gauge metal finish nails, completely penetrate white pine and yellow pine and at least partially penetrate oak.

36. The nail pack of claim 35 wherein the nails have an L/d ratio of between about 10 and about 25.

37. The nail pack of claim 35 wherein the nails have an L/d ratio of between about 10 and about 30.

38. The nail pack of claim 35 wherein the nails have an L/d ratio more than 10.

39. The nail pack of claim 38, wherein the flexural modulus is greater than about 1.6×

10⁶ psi.

40. The nail pack of claim 38, wherein the flexural modulus is greater than about 1.9×

10⁶ psi.

41. The nail pack of claim 38, wherein the compression strength is greater than about 25,000 psi.

42. The nail pack of claim 38, wherein the compression strength is greater than about 30,000 psi.