Porous polymeric membrane toughened composites

• US 6,737,158 B1
• Filed: 10/30/2002
• Issued: 05/18/2004
• Est. Priority Date: 10/30/2002
• Status: Active Grant

• Current Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Original Assignee: Gore Enterprise Holdings Incorporated
• Inventors: Thompson, Samuel A.
• Primary Examiner(s): Bell, Bruce F.
• Application Number:
  US10/284,396
• Publication Number:
  US 20040084304A1
• Time in Patent Office: 566 Days
• Field of Search: 428/306.6, 428/304.4, 428/308.4, 428/307.3, 428/315.5, 428/316.6, 428/317.1, 428/320.2, 428/322.7, 428/421, 428/900, 257/701, 257/702, 174/126.2, 204/296, 89/360.5, 89/360.2
• US Class Current: 428/306.6
• CPC Class Codes: F41H 5/02 Plate construction
• CPC Class Codes: F41H 5/0471 Layered armour containing fibre- or fabric-reinforced layers in combination with ceramic layers F41H5/0428, with metal layers F41H5/0457
• CPC Class Codes: F41H 5/08 for personal use , i.e. hand held shields
• CPC Class Codes: H05K 1/0353 consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
• CPC Class Codes: H05K 2201/0116 Porous, e.g. foam
• CPC Class Codes: H05K 2201/015 Fluoropolymer, e.g. polytetrafluoroethylene [PTFE]
• CPC Class Codes: Y10S 428/90 Magnetic feature
• CPC Class Codes: Y10T 428/249953 Composite having voids in a component [e.g., porous, cellular, etc.]
• CPC Class Codes: Y10T 428/249955 Void-containing component partially impregnated with adjacent component
• CPC Class Codes: Y10T 428/249956 Void-containing component is inorganic
• CPC Class Codes: Y10T 428/249958 Void-containing component is synthetic resin or natural rubbers
• CPC Class Codes: Y10T 428/249978 Voids specified as micro
• CPC Class Codes: Y10T 428/249981 Plural void-containing components
• CPC Class Codes: Y10T 428/249982 With component specified as adhesive or bonding agent
• CPC Class Codes: Y10T 428/249994 Composite having a component wherein a constituent is liquid or is contained within preformed walls [e.g., impregnant-filled, previously void containing component, etc.]
• CPC Class Codes: Y10T 428/249999 Differentially filled foam, filled plural layers, or filled layer with coat of filling material
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers

Abstract

Composites comprising porous polymeric membrane films meeting the following equation: 75 MPa<(longitudinal membrane tensile modulus+transverse membrane tensile modulus)/2, wherein at least a portion of the porosity of the membrane is imbibed with resin and methods for making the same. The composites have unusually high resistance to fracture and catastrophic failure.

Claims

1. A composite comprising a porous polymeric membrane, wherein the porosity of the membrane is at least partially filled with resin, the resin having a room temperature flexural modulus of greater than about 1 GPa, and wherein the membrane satisfies the following equation:

75 MPa<

(longitudinal membrane tensile modulus+transverse membrane tensile modulus)/2.

2. The composite of claim 1, wherein the resin comprises a material selected from the group consisting of metals, metalloids, ceramics, polymeric materials, and combinations thereof.

3. The composite of claim 1, wherein the resin comprises polymeric material.

4. The composite of claim 3, wherein the polymeric material comprises thermoplastic polymer.

5. The composite of claim 3, wherein the polymeric material comprises thermoset polymer.

6. The composite of claim 3, wherein the ratio of the room temperature flexural modulus of the resin to the room temperature flexural modulus of the composite, measured in the direction of the higher of the transverse and longitudinal moduli, is greater than or equal to about 1.

7. The composite of claim 3, further including at least one filler material.

8. The composite of claim 1, wherein the membrane comprises a material selected from the group consisting of vinyl polymers, styrenes, acrylates, methacrylates, polyethylenes, polypropylenes, polyacrylonitriles, polyacrylamides, poly vinyl chlorides, fluoropolymers, condensation polymers, polysulfones, polyimides, polyamides, polycarbonates, polysulfides, polyesters, polyanhydrides, polyacetals, polyurethanes, polyureas, cellulose, cellulose derivatives, polysaccharides, pectinic polymers and derivatives, alginic polymers and derivatives, chitins and derivatives, phenolics, aldehyde polymers, polysiloxanes and derivatives, and combinations thereof.

9. The composite of claim 8, wherein the fluoropolymer is polytetraflouroethylene.

10. The composite of claim 9, wherein the polytetraflouroethylene is expanded polytetrafluoroethylene.

11. The composite of claim 10, wherein the expanded polytetraflouroethylene is substantially void of nodal material.

12. The composite of claim 1, wherein the composite is joined to one or more metal layers in the form of a laminate.

13. The composite of claim 12, wherein the one or more metals are selected from the group consisting of aluminum, copper, gold, tin, silver, lead and combinations thereof.

14. The composite of claim 1, wherein the composite is joined to one or more capacitance layer materials.

15. The composite of claim 1, wherein the composite is a layer of a laminate.

16. The composite of claim 15, wherein the composite is an interface adhesive layer in the laminate.

17. The composite of claim 15, wherein the composite is an outer layer on the laminate.

18. The composite of claim 15, wherein the laminate additionally includes at least one layer of a material selected from metal and capacitance materials.

19. The composite of claim 18, wherein the metal is selected from the group consisting of aluminum, copper, gold, tin, silver, lead and combinations thereof.

20. A printed circuit board comprising the composite of claim 1.

21. An electronic substrate comprising the composite of claim 1.

22. A chip package substrate comprising the composite of claim 1.

23. A silicon wafer comprising the composite of claim 1.

24. The composite of claim 1, wherein the resin exhibits brittle failure.

25. The composite of claim 1, wherein the glass transition temperature of the resin is equal to the glass transition temperature of the composite.

26. The composite of claim 1, wherein the composite is laminated to at least one layer of high modulus fiber containing material.

27. The composite of claim 26, wherein the high modulus fiber is selected from the group consisting of glass fiber, carbon fiber, ceramic fiber, and combinations thereof.

28. A sporting goods article comprising the composite of claim 1.

29. The sporting goods article of claim 28, wherein the sporting goods article is selected from the group consisting of fishing equipment, hunting equipment, golf equipment, tennis equipment, skiing equipment, track and field equipment, basketball equipment, football equipment, soccer equipment, lacrosse equipment, and hockey equipment.

30. An aerospace part comprising the composite of claim 1.

31. The aerospace part of claim 30, wherein the aerospace part is selected from the group consisting of aircraft panels, safety devices, fan blades, control surfaces, and struts.

32. An armor material comprising the composite of claim 1, wherein the armor material is selected from the group consisting of body armor and vehicle armor.

33. A composite comprising a porous polymeric membrane, wherein the porosity of the membrane is at least partially filled with resin and the membrane satisfies the following equation:

75 MPa<

(longitudinal membrane tensile modulus+transverse membrane tensile modulus)/2, and wherein the ratio of the room temperature flexural modulus of the resin to the room temperature flexural modulus of the composite, measured in the direction of the higher of the transverse and longitudinal moduli, is greater than or equal to about 1.

34. The composite of claim 33, wherein the resin comprises a material selected from the group consisting of metals, metalloids, ceramics, polymeric materials, and combinations thereof.

35. The composite of claim 33, wherein the resin comprises polymeric material.

36. The composite of claim 35, wherein the polymeric material comprises thermoplastic polymer.

37. The composite of claim 35, wherein the polymeric material comprises thermoset polymer.

38. The composite of claim 33, further including at least one filler material.

39. The composite of claim 33, wherein the membrane comprises a material selected from the group consisting of vinyl polymers, styrenes, acrylates, methacrylates, polyethylenes, polypropylenes, polyacrylonitriles, polyacrylamides, poly vinyl chlorides, fluoropolymers, condensation polymers, polysulfones, polyimides, polyamides, polycarbonates, polysulfides, polyesters, polyanhydrides, polyacetals, polyurethanes, polyureas, cellulose, cellulose derivatives, polysaccharides, pectinic polymers and derivatives, alginic polymers and derivatives, chitins and derivatives, phenolics, aldehyde polymers, polysiloxanes and derivatives, and combinations thereof.

40. The composite of claim 39, wherein the fluoropolymer is polytetrafluoroethylene.

41. The composite of claim 40, wherein the polytetrafluoroethylene is expanded polytetrafluoroethylene.

42. The composite of claim 41, wherein the expanded polytetrafluoroethylene is substantially void of nodal material.

43. The composite of claim 33, wherein the composite is joined to one or more metal layers in the form of a laminate.

44. The composite of claim 43, wherein the one or more metals are selected from the group consisting of aluminum, copper, gold, tin, silver, lead, and combinations thereof.

45. The composite of claim 33, wherein the composite is joined to one or more capacitance layer materials.

46. The composite of claim 33, wherein the composite is a layer of a laminate.

47. The composite of claim 46, wherein the composite is an interface adhesive layer in the laminate.

48. The composite of claim 46, wherein the composite is an outer layer on the laminate.

49. The composite of claim 46, wherein the laminate additionally includes at least one layer of a material selected from metal and capacitance materials.

50. The composite of claim 46, wherein the metal is selected from the group consisting of aluminum, copper, gold, tin, silver, lead, and combinations thereof.

51. The composite of claim 50, wherein the metal is copper.

52. A printed circuit board comprising the composite of claim 33.

53. An electronic substrate comprising the composite of claim 33.

54. A chip package substrate comprising the composite of claim 33.

55. A silicon wafer comprising the composite of claim 33.

56. The composite of claim 33, wherein the resin exhibits brittle failure.

57. The composite of claim 33, wherein the composite is laminated to at least one layer of high modulus fiber containing material.

58. The composite of claim 57, wherein the high modulus fiber is selected from the group consisting of glass fiber, carbon fiber, ceramic fiber, and combinations thereof.

59. A sporting goods article comprising the composite of claim 33.

60. The sporting goods article of claim 59, wherein the sporting goods article is selected from the group consisting of fishing equipment, hunting equipment, golf equipment, tennis equipment, skiing equipment, track and field equipment, basketball equipment, football equipment, soccer equipment, lacrosse equipment, and hockey equipment.

61. An aerospace part comprising the composite of claim 33.

62. The aerospace part of claim 61, wherein the aerospace part is selected from the group consisting of aircraft panels, safety devices, fan blades, control surfaces, and struts.

63. The composite of claim 33, wherein the resin has a room temperature flexural modulus of greater than about 1 GPa.

64. An armor material comprising the composite of claim 33, wherein the armor material is selected from the group consisting of body armor and vehicle armor.

65. A composite comprising a porous expanded polytetrafluoroethylene membrane, wherein the porosity of the membrane is at least partially filled with resin, the resin having a room temperature flexural modulus of greater than about 1 GPa, and wherein the membrane satisfies the following equation:

75 MPa<

(longitudinal membrane tensile modulus+transverse membrane tensile modulus)/2.

66. The composite of claim 65, wherein the resin comprises a material selected from the group consisting of metals, metalloids, ceramics, polymeric materials, and combinations thereof.

67. The composite of claim 66, wherein the resin comprises polymeric material.

68. The composite of claim 67, wherein the polymeric material comprises thermoplastic polymer.

69. The composite of claim 67, wherein the polymeric material comprises thermoset polymer.

70. The composite of claim 65, wherein the ratio of the room temperature flexural modulus of the resin to the room temperature modulus of the composite, measured in the direction of the higher of the transverse and longitudinal moduli, is greater than or equal to about 1.

71. The composite of claim 65, further including at least one filler material.

72. The composite of claim 65, wherein the membrane is substantially void of nodal material.

73. The composite of claim 65, wherein the composite is joined to one or more metal layers in the form of a laminate.

74. The composite of claim 73, wherein the one or more metals are selected from the group consisting of aluminum, copper, gold, tin, silver, lead and combinations thereof.

75. The composite of claim 65, wherein the composite is joined to one or more capacitance layer materials.

76. The composite of claim 65, wherein the composite is a layer of a laminate.

77. The composite of claim 76, wherein the composite is an interface adhesive layer in the composite.

78. The composite of claim 76, wherein the composite is an outer layer on the laminate.

79. The composite of claim 76, wherein the laminate additionally includes at least one layer of a material selected from metal and capacitance materials.

80. The composite of claim 76, wherein the metal is selected from the group consisting of aluminum, copper, gold, tin, silver, lead and combinations thereof.

81. A printed circuit board comprising the composite of claim 65.

82. An electronic substrate comprising the composite of claim 65.

83. A chip package substrate comprising the composite of claim 65.

84. A silicon wafer comprising the composite of claim 65.

85. The composite of claim 65, wherein the resin exhibits brittle failure.

86. The composite of claim 65, wherein the glass transition temperature of the resin is equal to the glass transition temperature of the composite.

87. The composite of claim 65, wherein the ratio of the room temperature flexural modulus of the resin divided by the room temperature flexural modulus of the composite measured in the direction parallel to the higher modulus direction of the membrane is greater than about 1.

88. The composite of claim 65, wherein the composite is laminated to at least one layer of high modulus fiber containing material.

89. The composite of claim 88, wherein the high modulus fiber is selected from the group consisting of glass fiber, carbon fiber, ceramic fiber, and combinations thereof.

90. An electronic chip package comprising a laminated substrate, wherein the laminated substrate includes at least one conductive layer and at least one dielectric layer bonded to the conductive layer, the dielectric layer comprising a porous, expanded polytetrafluoroethylene membrane wherein the porosity of the membrane is at least partially filled with resin, the resin has a room temperature flexural modulus of greater than about 1 GPa, and the membrane satisfies the following equation:

75 MPa<

(longitudinal membrane tensile modulus+transverse membrane tensile modulus)/2.

91. The electronic chip package of claim 90, further comprising alternating layers of the at least one conductive layer and the at least one dielectric layer.

92. The electronic chip package of claim 91, further comprising at least one via therein.

93. The electronic chip package of claim 90, wherein the resin comprises polymeric material.

94. The electronic chip package of claim 93, wherein the polymeric material comprises thermoplastic polymer.

95. The electronic chip package of claim 93, wherein the polymeric material comprises thermoset polymer.

96. The electronic chip package of claim 93, wherein the conductive layer comprises a material selected from the group consisting of aluminum, copper, gold, tin, silver, lead, and combinations thereof.

97. The electronic chip package of claim 96, wherein the conductive layer comprises copper.

98. The electronic chip package of claim 96, wherein the expanded polytetraflouroethylene membrane is substantially void of nodal material.

99. The electronic chip package of claim 96, wherein the ratio of the room temperature flexural modulus of the resin to the room temperature flexural modulus of the composite, measured in the direction of the higher of the transverse and longitudinal moduli, is greater than or equal to 1.