Composite material-use fiber base material
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United States of America Patent
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N/A
Issued Date -
Dec 9, 2004
app pub date -
Aug 2, 2004
filing date -
Aug 2, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a fiber base material for constituting a composite material for increasing interlaminar strength (peeling strength, out-of-plane strength, post-impact strength), improving impregnation efficiency of a matrix in a composing process and preventing a resin-rich portion that affects the strength. A fiber base material for constituting a composite material comprising a single layer or a plurality of layers of a solid-shape base material constituted of a woven or knitted continuous fiber, wherein the base material is raised for enhancing interlaminar or bonding plane strength, improving permeability of a matrix at a surface and an interior portion thereof, and increasing plane smoothness. The raising process is also applicable to a fiber base material for constituting a composite material comprising a plurality of layers including a sheet-shape base material constituted of a woven or knitted continuous fiber, or including the sheet-shape base material and the solid-shape base material. The raising process is carried out by needle-punching. When necessary, a fiber web is introduced into an interface of the fiber structure in parallel with the raising process, during the needle-punching. The surface is smoothed.
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