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A dual ovenable film having a first layer comprising one or more polyamides and a second layer comprising one or more polyamides. The first layer forms the first outer surface of the film. The second layer has a melting point of at least about 210° C. The film is capable of forming a water-containin

A dual ovenable film having a first layer comprising one or more polyamides and a second layer comprising one or more polyamides. The first layer forms the first outer surface of the film. The second layer has a melting point of at least about 210° C. The film is capable of forming a water-containing package by providing two 4 inch by 6 inch sheets of the film each having four perimeter sides, placing the sheets in superimposed, coextensive arrangement having the first layers of the films in contact with each other, and heat sealing three perimeter sides of the sheets together using a ⅛-inch wide sealing bar at a temperature of 290° F., a dwell time of 0.5 seconds, and a sealing pressure of 40 psig to form an open pouch having heat seals along three of the four perimeter sides. The open pouch can be filled with 100 milliliters of distilled water at a temperature of 73° F. and the fourth perimeter side of the sheet can be heat sealed together under the same conditions as used to seal the three perimeter sides to form a closed package having a heat seal along the fourth perimeter side and containing the water. The seal strength of the resulting heat seals is at least 1 pound/inch after the closed, water-containing package has been exposed to three hours in a conventional oven at 400° F. (air temperature). The film may be used to form heat sealed pouches at “polyolefin-type” of heat seal conditions, yet the integrity of the heat seals may be maintained even when the heat seal is exposed to conventional oven conditions.

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1. A film comprising:a first layer comprising at least about 70 weight %, based on the weight of the first layer, of a polyamide blend comprising: between about 1 to about 50 weight % of one or more high-melting polyamides, based on the weight of the polyamide blend, wherein each of the one or more

1. A film comprising:a first layer comprising at least about 70 weight %, based on the weight of the first layer, of a polyamide blend comprising: between about 1 to about 50 weight % of one or more high-melting polyamides, based on the weight of the polyamide blend, wherein each of the one or more high-melting polyamides has a melting point of at least about 210° C.; and at least about 50 weight %, based on the weight of the polyamide blend, of one or more low-melting polyamides, wherein each of the one or more low-melting polyamides has a melting point of less than about 210° C.; and a second layer comprising one or more polyamides, wherein the second layer has a melting point of at least about 210° C.; the film has first and second opposite outer surfaces and the first layer forms the first outer surface of the film; and the film is substantially free of polyolefin. 2. The film of claim 1 wherein the first layer has a melting point and the melting point of the second layer is at least about 20° F. greater than the melting point of the first layer.3. The film of claim 1 wherein the first layer comprises less than about 50% of the total thickness of the film.4. The film of claim 1 wherein the second layer comprises at least about 50% of the total thickness of the film.5. The film of claim 1 wherein the second layer comprises at least about 80% of one or more polyamides by weight of the second layer.6. The film of claim 1 wherein the second layer comprises one or more polyamides selected from nylon-6, nylon-6,6, and nylon-6/6,6.7. The film of claim 1 wherein the second layer forms the second outer surface of the film.8. The film of claim 1 wherein the haze of the film after two hours of exposure to air temperature of 400° F. in a conventional oven is less than about 20%.9. A packaged food comprising:a food; and a package enclosing the food, wherein the package comprises the film of claim 1. 10. The film of claim 1 wherein the film comprises a third layer comprising ethylene/vinyl alcohol.11. The film of claim 1 wherein the film has an oxygen transmission rate of no more than about 150 cubic centimeters (at standard temperature and pressure) per square meter per day per 1 atmosphere of oxygen pressure differential measured at 0% relative humidity and 23° C.12. A method of heating a food comprising:providing a food enclosed in a package comprising the film of claim 1; placing the food enclosed in the package in an oven; and activating the oven to heat the food enclosed in the package to a desired level. 13. The film of claim 1 wherein the first layer has a melting point of less than about 220° C.14. The film of claim 1 wherein the first layer has a melting point of less than about 210° C.15. The film of claim 1 wherein the first layer has a melting point at least about 150° C. and of less than about 220° C.16. The film of claim 1 wherein the first layer comprises at least about 80 weight % of the polyamide blend, based on the weight of the first layer.17. The film of claim 1 wherein the first layer comprises at least about 90 weight % of the polyamide blend, based on the weight of the first layer.18. The film of claim 1 wherein the first layer comprises at least about 95 weight % of the polyamide blend, based on the weight of the first layer.19. The film of claim 1 wherein the polyamide blend comprises less than about 40 weight % of the one or more high-melting polyamides, based on the weight of the polyamide blend.20. The film of claim 1 wherein the polyamide blend comprises less than about 30 weight % of the one or more high-melting polyamides, based on the weight of the polyamide blend.21. The film of claim 1 wherein the polyamide blend comprises at least about 60 weight % of the one or more low-melting polyamides, based on the weight of the polyamide blend.22. The film of claim 1 wherein the polyamide blend comprises at least about 70 weight % of the one or more low-melting polyamides, based on the weight of the polyamide blend.23. The film of claim 1 wherein the polyamide blend comprises at least about 80 weight % of the one or more low-melting polyamides, based on the weight of the polyamide blend.24. The film of claim 1 wherein each of the one or more high-melting polyamides has a melting point of at least about 215° C.25. The film of claim 1 wherein each of the one or more high-melting polyamides has a melting point of at least about 220° C.26. The film of claim 1 wherein each of the one or more low-melting polyamides has a melting point of less than about 205° C.27. The film of claim 1 wherein each of the one or more low-melting polyamides has a melting point of less than about 200° C.28. The film of claim 1 wherein the polyamide blend comprises one or more amorphous polyamides.29. The film of claim 1 wherein the first layer comprises at least about 20 weight % amorphous polyamide based on the weight of the first layer.30. The film of claim 1 wherein the film is substantially free of polyester.31. The film of claim 1 wherein the first layer comprises one or more polyamides selected from nylon-6 and nylon-6,6.32. The film of claim 1 wherein the first layer comprises one or more polyamides selected from nylon-6,6/6,10, nylon-6,10, and nylon-6,12.33. The film of claim 1 wherein the first layer comprises one or more polyamides selected from nylon-6/6,T, nylon-MXD,6, nylon-4,6, and nylon-6,9.34. The film of claim 1 wherein the first layer comprises one or more polyamides selected from nylon-6/12, nylon-12, nylon-12,T, nylon-6/6,9, nylon-11, and nylon-6,6/6,10, wherein the nylon-6,6/6,10 comprises from about 10 mole % to about 60 mole % hexamethylene adipamide polymer units.35. A film comprising:a first layer comprising: at least about 30 weight % of amorphous polyamide, based on the weight of the first layer; and from about 5 weight % to less than about 50 weight % based on the weight of the first layer of a high-melting polyamide selected from the group consisting of nylon-6, nylon-6,6, nylon-6/6,6, nylon-6,10, nylon-6,12, nylon-6/6,T, nylon-MXD,6, nylon-4,6, nylon-6,9, and nylon-6,6/6,10, wherein the nylon-6,6/6,10 comprises an amount of hexamethylene adipamide polymer units selected from less than about 10 mole % and more than about 60 mole %; and a second layer comprising one or more polyamides, wherein the second layer has a melting point of at least about 210° C.; wherein: the film has first and second opposite outer surfaces and the first layer forms the first outer surface of the film; and the film is substantially free of polyolefin. 36. The film of claim 35 wherein the first layer comprises at least about 40 weight % of amorphous polyamide, based on the weight of the first layer.37. The film of claim 35 wherein the first layer comprises at least about 50 weight % of amorphous polyamide, based on the weight of the first layer.38. The film of claim 35 wherein the first layer comprises at least about 60 weight % of amorphous polyamide, based on the weight of the first layer.39. The film of claim 35 wherein the first layer comprises at least about 70 weight % of amorphous polyamide, based on the weight of the first layer.40. The film of claim 35 wherein the amorphous polyamide comprises nylon-6,I/6,T.41. The film of claim 35 wherein the first layer comprises at least about 50 weight % of nylon-6,I/6,T, based on the weight of the first layer.42. The film of claim 35 wherein the first layer comprises from about 5 weight % to less than about 50 weight % nylon-6, based on the weight of the first layer.43. The film of claim 35 wherein the first layer comprises from about 5 weight % to less than about 50 weight % nylon-6,6, based on the weight of the first layer.44. The film of claim 35 wherein the first layer comprises from about 5 weight % to less than about 50 weight % nylon-6/6,6, based on the weight of the first layer.45. The film of claim 35 wherein the first layer comprises from about 5 weight % to less than about 50 weight % nylon-6,6/6,10, based on the weight of the first layer, wherein the nylon-6,6/6,10 comprises an amount of hexamethylene adipamide polymer units selected from less than about 10 mole % and more than about 60 mole %.46. The film of claim 35 wherein the first layer comprises from about 5 weight % to less than about 50 weight % based on the weight of the first layer of a polyamide selected from nylon-6,10, nylon-6,12, nylon-6/6,T, nylon-MXD,6, nylon-4,6, and nylon-6,9.47. The film of claim 35 wherein the first layer comprises less than about 40 weight % high-melting polyamide.48. The film of claim 35 wherein the first layer comprises less than about 30 weight % high-melting polyamide.49. The film of claim 35 wherein the first layer has a melting point of less than about 220° C.50. The film of claim 35 wherein the first layer has a melting point of less than about 210° C.51. The film of claim 35 wherein the first layer has a melting point at least about 150° C. and of less than about 220° C.52. The film of claim 35 wherein the high-melting polyamide has a melting point of at least about 210° C.53. The film of claim 35 wherein the high-melting polyamide has a melting point of at least about 215° C.54. The film of claim 35 wherein the high-melting polyamide has a melting point of at least about 220° C.55. The film of claim 35 wherein the second layer comprises one or more polyamides selected from selected from nylon-6, nylon-6,6, and nylon-6/6,6.56. The film of claim 35 wherein the second layer comprises one or more polyamides selected from nylon-6,10, nylon-6,12, nylon-6/6,T, nylon-MXD,6, nylon-4,6, nylon-6,9, and nylon-6,6/6,10.57. The film of claim 35 wherein the film is substantially free of polyester.58. The film of claim 35 wherein the first layer has a melting point and the melting point of the second layer is at least about 20° F. greater than the melting point of the first layer.59. The film of claim 35 wherein the first layer comprises less than about 50% of the total thickness of the film.60. The film of claim 35 wherein the second layer comprises at least about 50% of the total thickness of the film.61. The film of claim 35 wherein the second layer comprises at least about 80% of one or more polyamides by weight of the second layer.62. The film of claim 35 wherein the second layer forms the second outer surface of the film.63. The film of claim 35 wherein the haze of the film after two hours of exposure to air temperature of 400° F. in a conventional oven is less than about 20%.64. A packaged food comprising:a food; and a package enclosing the food, wherein the package comprises the film of claim 35. 65. The film of claim 35 wherein the film comprises a third layer comprising ethylene/vinyl alcohol.66. The film of claim 35 wherein the film has an oxygen transmission rate of no more than about 150 cubic centimeters (at standard temperature and pressure) per square-meter per day per 1 atmosphere of oxygen pressure differential measured at 0% relative humidity and 23° C.67. A method of heating a food comprising:providing a food enclosed in a package comprising the film of claim 35; placing the food enclosed in the package in an oven; and activating the oven to heat the food enclosed in the package to a desired level. 68. A film comprising:a first layer comprising at least about 70 weight % nylon-6/6,6 based on the weight of the first layer wherein: the nylon-6/6,6 comprises an amount of hexamethylene adipamide polymer units selected from at least about 60 mole % and less than about 20 mole %; and the first layer has a melting point of less than about 220° C; and a second layer comprising one or more polyamides, wherein: the second layer has a melting point of at least about 210° C; the film has first and second opposite outer surfaces; and the first layer forms the first outer surface of the film wherein the film is substantially free of polyolefin. 69. The film of claim 68 wherein the second layer forms the second outer surface of the film.70. The film of claim 68 wherein the first layer comprises less than about 50% of the total thickness of the film.71. The film of claim 68 wherein the first layer comprises less than about 40% of the total thickness of the film.72. The film of claim 68 wherein the first layer comprises less than about 30% of the total thickness of the film.73. The film of claim 68 wherein the second layer comprises at least about 40% of the total thickness of the film.74. The film of claim 68 wherein the second layer comprises at least about 50% of the total thickness of the film.75. The film of claim 68 further comprising a third layer between the first and second layers wherein the third layer comprises amorphous polyamide.76. The film of claim 68 further comprising a third layer between the first and second layers wherein the third layer comprises at least about 50 weight %, based on the weight of the third layer, of amorphous polyamide.77. The film of claim 68 further comprising a third layer between the first and second layers wherein the third layer comprises at least about 80 weight %, based on the weight of the third layer, of amorphous polyamide.78. The film of claim 68 further comprising a third layer between the first and second layers wherein the third layer comprises at least about 80 weight %, based on the weight of the third layer, of nylon-6,I/6,T.79. The film of claim 68 wherein the first layer has a melting point of less than about 210° C.80. The film of claim 68 wherein the first layer has a melting point of less than about 200° C.81. The film of claim 68 wherein the first layer has a melting point of less than about 190° C.82. The film of claim 68 wherein the first layer comprises at least about 80 weight % nylon-6/6,6 based on the weight of the first layer.83. The film of claim 68 wherein the first layer comprises at least about 90 weight % nylon-6/6,6 based on the weight of the first layer.84. The film of claim 68 wherein the first layer comprises at least about 95 weight % nylon-6/6,6 based on the weight of the first layer.85. The film of claim 68 wherein the nylon-6/6,6 comprises at least about 70 mole % hexamethylene adipamide polymer units.86. The film of claim 68 wherein the nylon-6/6,6 comprises at least about 80 mole % hexamethylene adipamide polymer units.87. The film of claim 68 wherein the nylon-6/6,6 comprises less than about 10 mole % hexamethylene adipamide polymer units.88. The film of claim 68 wherein the second layer comprises one or more polyamides selected from selected from nylon-6, nylon-6,6, and nylon-6/6,6.89. The film of claim 68 wherein the second layer comprises one or more polyamides selected from nylon-6,10, nylon-6,12, nylon-6/6,T, nylon-MXD,6, nylon-4,6, nylon-6,9, and nylon-6,6/6,10.90. The film of claim 68 wherein the film is substantially free of polyester.91. The film of claim 68 wherein the first layer has a melting point and the melting point of the second layer is at least about 20° F. greater than the melting point of the first layer.92. The film of claim 68 wherein the haze of the film after two hours of exposure to air temperature of 400° F. in a conventional oven is less than about 20%.93. A packaged food comprising:a food; and a package enclosing the food, wherein the package comprises the film of claim 68. 94. The film of claim 68 wherein the film comprises a fourth layer comprising ethylene/vinyl alcohol.95. The film of claim 68 wherein the film has an oxygen transmission rate of no more than about 150 cubic centimeters (at standard temperature and pressure) per square meter per day per 1 atmosphere of oxygen pressure differential measured at 0% relative humidity and 23° C.96. A method of heating a food comprising:providing a food enclosed in a package comprising the film of claim 68; placing the food enclosed in the package in an oven; and activating the oven to heat the food enclosed in the package to a desired level.