Fiber reinforced composite material

• US 8,722,783 B2
• Filed: 11/30/2007
• Issued: 05/13/2014
• Est. Priority Date: 11/30/2006
• Status: Expired due to Fees

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Rose, John, Brown, Malcolm, Hall, Michael, Macauley, Nicola
• Primary Examiner(s): LEE, DORIS L
• Application Number:
  US12/516,573
• Publication Number:
  US 20100137491A1
• Time in Patent Office: 2,356 Days
• Field of Search: 524/417
• US Class Current: 524/417
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable, resorptive for implantable prostheses A61F2210/0004
• CPC Class Codes: A61L 31/128 containing other specific inorganic fillers not covered by A61L31/126 or A61L31/127
• CPC Class Codes: A61L 31/129 containing macromolecular fillers
• CPC Class Codes: A61L 31/148 Materials at least partially resorbable by the body
• CPC Class Codes: C08J 5/043 with glass fibres
• CPC Class Codes: C08J 5/046 with synthetic macromolecular fibrous material
• CPC Class Codes: C08K 2003/265 Calcium, strontium or barium carbonate
• CPC Class Codes: C08K 3/26 Carbonates; Bicarbonates
• CPC Class Codes: C08K 7/14 Glass
• CPC Class Codes: C08K 9/02 Ingredients treated with inorganic substances
• CPC Class Codes: C08L 67/04 Polyesters derived from hydroxycarboxylic acids, e.g. lactones C08L67/06 takes precedence

Abstract

The present disclosure relates to a fiber reinforced composite material. In an embodiment, the composite material includes a PLLA fiber material and a matrix material that does not have the same chemical element composition as the fiber material. Other fiber reinforced composite materials are also disclosed.

Claims

1. A fiber reinforced composite material comprising:

a matrix material selected from the group consisting of a polymer, a copolymer and a polymer blend;

a fiber material; and

a degradation controlling agent, wherein the degradation controlling agent is selected from the group consisting of buffer materials, common salts, and combinations thereof; and

wherein the composite material has an initial tensile strength of at least 250 MPa.

2. The composite material of claim 1, further comprising a degradation accelerant dispersed in the matrix material.

3. The composite material of claim 1, wherein the buffer material is selected from the group consisting of calcium carbonate, calcium hydrogen carbonates, calcium phosphates, dicalcium phosphates, tricalcium phosphates, magnesium carbonate, and sodium carbonate.

4. The composite material of claim 1, further comprising a degradation accelerant dispersed in the fiber material.

5. The composite material of claim 1, wherein the degradation controlling agent consists of common salts.

6. The composite material of claim 1, wherein the degradation controlling agent consists of combinations of buffer materials and common salts.

7. The composite material of claim 1, wherein the degradation controlling agent consists of a buffer material.

8. The composite material of claim 7, wherein the buffer material consists of calcium carbonate.

9. The composite material of claim 7, wherein the buffer material consists of calcium hydrogen carbonates.

10. The composite material of claim 7, wherein the buffer material is selected from the group consisting of calcium phosphates, dicalcium phosphates and tricalcium phosphates.

11. The composite material of claim 7, wherein the buffer material consists of magnesium carbonate.

12. The composite material of claim 7, wherein the buffer material consists of sodium carbonate.

13. A fiber reinforced composite material comprising:

a PLLA fiber material;

a matrix material that does not have the same chemical element composition as the fiber material; and

a degradation controlling agent dispersed in the matrix material; and

a degradation accelerant dispersed in the PLLA fiber material.

14. The composite material of claim 13, wherein the degradation controlling agent comprises a buffer material selected from the group consisting of calcium carbonate, calcium hydrogen carbonates, calcium phosphates, dicalcium phosphates, tricalcium phosphates, magnesium carbonate, and sodium carbonate.

15. The composite material of claim 13, wherein the degradation controlling agent is a common salt.

16. The composite material of claim 13, wherein the matrix material comprises the degradation controlling agent in an amount of between about 0.1% and about 40% by weight.

17. The composite material of claim 13, wherein the degradation controlling agent is selected from the group consisting of buffer materials, common salts, and combinations thereof.

18. The composite material of claim 13, wherein the PLLA fiber material comprises a continuous PLLA fiber material.

19. The composite material of claim 13, wherein the PLLA fiber material is bioabsorbable.

20. The composite material of claim 13, wherein the matrix material is selected from the group consisting of polymers, copolymers, and polymer blends.

21. The composite material of claim 13, wherein the matrix material is bioabsorbable.

22. A fiber reinforced composite material comprising:

a PLLA fiber material;

a matrix material that does not have the same chemical element composition as the fiber material; and

a degradation accelerant dispersed in the matrix material; and

a degradation accelerant dispersed in the PLLA fiber material.

23. The composite material of claim 22, wherein the PLLA fiber material comprises a continuous PLLA fiber material.

24. The composite material of claim 22, wherein the fiber material is bioabsorbable.

25. The composite material of claim 22, wherein the matrix material is selected from the group consisting of polymers, copolymers, and polymer blends.

26. The composite material of claim 22, wherein the matrix material is bioabsorbable.

27. A fiber reinforced composite material comprising:

a PLLA fiber material;

a matrix material that does not have the same chemical element composition as the fiber material; and

a degradation accelerant dispersed in the matrix material or a degradation controlling agent dispersed in the matrix material; and

wherein the matrix material is selected from the group consisting of polymers, copolymers, and polymer blends; and

wherein the polymer blend comprises at least two polymers, wherein at least one of the at least two polymers has a chemical element composition that is different to that of the fiber.

28. The composite material of claim 27, wherein the polymer blend comprises the polymer having a chemical element composition that is different to that of the fiber in an amount of at least 50% of the polymer blend.

29. The composite material of claim 28, wherein the polymer blend comprises the polymer having a chemical element composition that is different to that of the fiber in an amount of more than 50% of the polymer blend.

30. A fiber reinforced composite material comprising:

a PLLA fiber material;

a matrix material that does not have the same chemical element composition as the fiber material; and

a degradation accelerant dispersed in the matrix material or a degradation controlling agent dispersed in the matrix material; and

wherein the fiber material has a tensile strength of between about 500 MPa and about 2000 MPa.

31. The composite material of claim 30, wherein the fiber material has a tensile strength of about 800 MPa.

32. A fiber reinforced composite material comprising:

a PLLA fiber material;

a matrix material that does not have the same chemical element composition as the fiber material; and

a degradation accelerant dispersed in the matrix material or a degradation controlling agent dispersed in the matrix material; and

wherein the composite has an initial tensile strength of at least 250 MPa.

33. The composite material of claim 32, wherein the composite retains at least 75% of the initial tensile strength for at least 8 weeks.

34. A fiber reinforced composite material comprising:

a PLLA fiber material;

a matrix material that does not have the same chemical element composition as the fiber material; and

a degradation controlling agent dispersed in the matrix material; and

wherein the fiber material has a molecular weight of between about 290,000 g/mol and about 516,000 g/mol.

35. A fiber reinforced composite material comprising:

a PLLA fiber material;

a matrix material that does not have the same chemical element composition as the fiber material; and

a degradation accelerant dispersed in the matrix material or a degradation controlling agent dispersed in the matrix material; and

wherein the composite material comprises the PLLA fiber material in an amount of about 50% by volume.

36. A fiber reinforced composite material comprising:

a PLLA fiber material;

a matrix material that does not have the same chemical element composition as the fiber material; and

a degradation accelerant dispersed in the matrix material or a degradation controlling agent dispersed in the matrix material; and

wherein the fiber material has a molecular weight of between about 290,000 g/mol and about 516,000 g/mol.

37. A fiber reinforced composite material comprising:

a PLLA fiber material;

a matrix material that does not have the same chemical element composition as the fiber material; and

a degradation accelerant dispersed in the matrix material or a degradation controlling agent dispersed in the matrix material; and

wherein the composite has a flexural strength of about 200 MPa.

38. A fiber reinforced composite material comprising:

a PLLA fiber material;

a matrix materHial that does not have the same chemical element composition as the fiber material; and

a degradation accelerant dispersed in the matrix material or a degradation controlling agent dispersed in the matrix material; and

wherein the composite has a shear strength of at least 140 MPa.