公开(公告)号：US4129634A

公开(公告)日：1978-12-12

申请号：US854533

申请日：1977-11-25

申请人： Andrew M. Cecka ,  Pol Dano ,  Paul G. Pawling

发明人： Andrew M. Cecka ,  Pol Dano ,  Paul G. Pawling

IPC分类号： A63B49/10 ,  B29D27/00

CPC分类号： A63B49/10 ,  B29C70/04 ,  A63B2209/023 ,  B29K2307/00 ,  Y10S264/17 ,  Y10S273/23 ,  Y10T428/2936

摘要： A novel structural member, such as a tennis racket frame, having an unusually high strength to weight ratio is provided comprising an expanded foamed plastic core integrally bonded to a shell comprising at least one layer of resin-coated unidirectionally oriented graphite fibers, the shell completely encasing the core at any transverse cross section of the structural member, with a seamless sleeve made of a thin, flexible cellulosic film between the core and the shell.The structural member is prepared by arranging within a mold cavity an outer shell comprising at least one sheet of resin-coated unidirectionally oriented graphite fibers and a core comprising a foamable resin composition while the core is maintained within a seamless sleeve made of a thin, flexible cellulosic film, sealing the mold cavity and activating the foamable resin composition to cause expansion and generate pressure within the mold cavity and thereby provide intimate bonding of the core to the shell.

摘要翻译： 提供了具有非常高的重量比的网球拍框架的新型结构构件，其包括一体地结合到壳体上的膨胀的发泡塑料芯，包括至少一层树脂涂覆的单向取向的石墨纤维，所述壳完全 在芯部和外壳之间由薄的柔性纤维素膜制成的无缝套管将芯部封装在结构件的任何横截面上。

公开(公告)号：US4070021A

公开(公告)日：1978-01-24

申请号：US703136

申请日：1976-07-07

申请人： Andrew W. Cecka ,  Pol Dano ,  Paul G. Pawling

发明人： Andrew W. Cecka ,  Pol Dano ,  Paul G. Pawling

IPC分类号： A63B49/10

CPC分类号： A63B49/10 ,  B29C70/04 ,  A63B2209/023 ,  B29K2307/00 ,  Y10S264/17 ,  Y10S273/23 ,  Y10T428/2936

摘要： A novel structural member, such as a tennis racket frame, having an unusually high strength to weight ratio is provided comprising an expanded foamed plastic core integrally bonded to a shell comprising at least one layer of resin-coated unidirectionally oriented graphite fibers, the shell completely encasing the core at any transverse cross section of the structural member, with a seamless sleeve made of a thin, flexible cellulosic film between the core and the shell.The structural member is prepared by arranging within a mold cavity an outer shell comprising at least one sheet of resin-coated unidirectionally oriented graphite fibers and a core comprising a foamable resin composition while the core is maintained within a seamless sleeve made of a thin, flexible cellulosic film, sealing the mold cavity and activating the foamable resin composition to cause expansion and generate pressure within the mold cavity and thereby provide intimate bonding of the core to the shell.

摘要翻译： 提供了具有非常高的重量比的网球拍框架的新型结构构件，其包括一体地结合到壳体上的膨胀的发泡塑料芯，包括至少一层树脂涂覆的单向取向的石墨纤维，所述壳完全 在芯部和外壳之间由薄的柔性纤维素膜制成的无缝套管将芯部封装在结构件的任何横截面上。

公开(公告)号：US4124670A

公开(公告)日：1978-11-07

申请号：US703137

申请日：1976-07-07

申请人： Andrew M. Cecka ,  Paul G. Pawling

发明人： Andrew M. Cecka ,  Paul G. Pawling

IPC分类号： A63B49/10 ,  B29D27/00

CPC分类号： A63B49/10 ,  B29C70/04 ,  A63B2209/023 ,  B29K2307/00 ,  Y10S264/05 ,  Y10S264/13 ,  Y10S264/17

摘要： A novel structural member, such as a tennis racket frame, having an unusually high strength to weight ratio is provided comprising an expanded foamed plastic core integrally bonded to a shell comprising at least one layer of resin-coated unidirectionally oriented graphite fibers, the shell completely encasing the core at any transverse cross section of the structural member, said core comprising from about 25 to about 75 volume percent of a low density cellular filler material, such as chopped cork, and from zero to about 60 weight percent of a high density weight control material, such as barium sulfate.The structural member is prepared by preparing a foamable resin composition comprising a resin component, a blowing agent, from about 7 to about 50 weight percent of a low density cellular filler material and from zero to about 60 weight percent of a high density weight control material, forming said composition into an elongated core strip, wrapping said core strip with at least one sheet of resin-coated unidirectionally oriented graphite fibers, arranging said wrapped core within a mold cavity, sealing the mold cavity and activating the foamable resin composition to cause expansion and generate pressure within the mold cavity and thereby provide intimate bonding of the core to the shell.

摘要翻译： 提供了具有非常高的重量比的网球拍框架的新型结构构件，其包括一体地结合到壳体上的膨胀的发泡塑料芯，包括至少一层树脂涂覆的单向取向的石墨纤维，所述壳完全 将芯包围在结构构件的任何横截面处，所述芯包含约25至约75体积％的低密度细胞填充材料，例如切碎的软木，以及从零至约60重量％的高密度重量 控制材料，如硫酸钡。

公开(公告)号：US6040397A

公开(公告)日：2000-03-21

申请号：US110168

申请日：1998-07-06

申请人： James R. Hooper ,  Richard K. Strother ,  John Fish ,  Paul G. Pawling ,  Gerald L. Sauer

发明人： James R. Hooper ,  Richard K. Strother ,  John Fish ,  Paul G. Pawling ,  Gerald L. Sauer

IPC分类号： C08F283/10 ,  C08G59/42 ,  C08L63/00

CPC分类号： C08F283/10 ,  C08G59/42 ,  C08L63/00

摘要： A single component, extremely low viscosity, pre-catalyzed high functionality diepoxide and epoxy resin system has been developed. This resin system has good thermal stability, an extended work life and is capable of being refrigerated to -18 C. and stored for extended periods of time with little or no change in physical or mechanical properties. The resin system has direct applications in a number of industries including, but not limited to, the aircraft and spacecraft industries. The resin system is a mixture of specific epoxy resins and curing agents that when combined form an extremely low viscosity resinous system that may be readily cured at a temperature as low as 52 degrees C. into novel thermoset materials prepared therefrom, which are characterized by superior strength properties and methods for preparing the same.

摘要翻译： 已经开发了单组分，极低粘度，预催化的高官能度二环氧化物和环氧树脂体系。 该树脂体系具有良好的热稳定性，延长的使用寿命，并且能够冷藏至-18℃，并且在物理或机械性能几乎没有或没有变化的情况下长时间储存​​。 树脂系统在许多行业中直接应用，包括但不限于飞机和航天器行业。 树脂体系是特定环氧树脂和固化剂的混合物，当组合形成极低粘度的树脂体系时，其可以在低至52℃的温度下容易地固化成由其制备的新型热固性材料，其特征在于优异 强度性能及其制备方法。

公开(公告)号：US4212461A

公开(公告)日：1980-07-15

申请号：US922984

申请日：1978-07-10

申请人： Andrew M. Cecka ,  Paul G. Pawling

发明人： Andrew M. Cecka ,  Paul G. Pawling

IPC分类号： A63B49/10

CPC分类号： A63B49/10 ,  A63B2209/023

摘要： A novel structural member, such as a tennis racket frame, having an unusually high strength to weight ratio is provided comprising an expanded foamed plastic core integrally bonded to a shell comprising at least one layer of resin-coated unidirectionally oriented graphite fibers, the shell completely encasing the core at any transverse cross section of the structural member, said core comprising from about 25 to about 75 volume percent of a low density cellular filler material, such as chopped cork, and from zero to about 60 weight percent of a high density weight control material, such as barium sulfate.The structural member is prepared by preparing a foamable resin composition comprising a resin component, a blowing agent, from about 7 to about 50 weight percent of a low density cellular filler material and from zero to about 60 weight percent of a high density weight control material, forming said composition into an elongated core strip, wrapping said core strip with at least one sheet of resin-coated unidirectionally oriented graphite fibers, arranging said wrapped core within a mold cavity, sealing the mold cavity and activating the foamable resin composition to cause expansion and generate pressure within the mold cavity and thereby provide intimate bonding of the core to the shell.

摘要翻译： 提供了具有非常高的重量比的网球拍框架的新型结构构件，其包括一体地结合到壳体上的膨胀的发泡塑料芯，包括至少一层树脂涂覆的单向取向的石墨纤维，所述壳完全 将芯包围在结构构件的任何横截面处，所述芯包含约25至约75体积％的低密度细胞填充材料，例如切碎的软木，以及从零至约60重量％的高密度重量 控制材料，如硫酸钡。 通过制备包含树脂组分，发泡剂，约7至约50重量％的低密度多孔填充材料和0至约60重量％的高密度重量控制材料的可发泡树脂组合物制备结构构件 ，将所述组合物形成细长的芯条，用至少一片树脂涂覆的单向取向的石墨纤维包裹所述芯条，将所述包裹的芯放置在模腔内，密封模腔并激活可发泡树脂组合物以引起膨胀 并在模腔内产生压力，从而提供芯与壳的紧密结合。