Three-dimensional spacer fabric resin interlaminar infusion media process and vacuum-induced reinforcing composite laminate structures
DCFirst Claim
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1. A method for the vacuum-induced fabrication of reinforced plastic composites comprising:
- assembling a fiber structure including a three-dimensional fibrous spacer fabric employed as an interlamina infusion medium, said fabric having at least first and second outer substantially fibrous layer surfaces composed of fibers or yarns, each of said outer layers being generally oriented in an X–
Y plane, said spacer fabric having between its outer layers an intermediate spacer layer composed of spacer fibers or yarns oriented in a generally transverse direction with respect to said X–
Y planes of said outer layers,juxtapositioning said spacer fabric with respect to at least one mold surface of a desired shape and configuration,forming an assembly comprising a substantially gas impervious cover sheet substantially enclosing said fabric,applying a negative pressure to said assembly, which collapses said spacer fabric,introducing a liquid resin flow within and into said collapsed spacer fabric while under negative pressure,continuing said resin flow to said collapsed spacer fabric so as to substantially fully saturate said spacer fabric with resin,terminating the resin flow, andthereafter allowing the resin to cure, with said spacer fabric in the collapsed state.
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Abstract
A three-dimensional spacer fabric resin interlaminar infusion medium and reinforcing composite lamina for use in the vacuum-induced manufacture of fiber reinforced polymer composites is described. This use of the three-dimensional spacer fabric as a composite interlaminar component improves both the vacuum-induced resin infusion flow rate and laminate quality control and aids in the achievement of enhanced resin uniformity distribution throughout the laminate.
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17 Claims
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1. A method for the vacuum-induced fabrication of reinforced plastic composites comprising:
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assembling a fiber structure including a three-dimensional fibrous spacer fabric employed as an interlamina infusion medium, said fabric having at least first and second outer substantially fibrous layer surfaces composed of fibers or yarns, each of said outer layers being generally oriented in an X–
Y plane, said spacer fabric having between its outer layers an intermediate spacer layer composed of spacer fibers or yarns oriented in a generally transverse direction with respect to said X–
Y planes of said outer layers,juxtapositioning said spacer fabric with respect to at least one mold surface of a desired shape and configuration, forming an assembly comprising a substantially gas impervious cover sheet substantially enclosing said fabric, applying a negative pressure to said assembly, which collapses said spacer fabric, introducing a liquid resin flow within and into said collapsed spacer fabric while under negative pressure, continuing said resin flow to said collapsed spacer fabric so as to substantially fully saturate said spacer fabric with resin, terminating the resin flow, and thereafter allowing the resin to cure, with said spacer fabric in the collapsed state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification