Fiber reinforced composite materials having resin practice inter-layer zones
AssigneeTroy Industries, Inc.
InventorsNobuyuki Odagiri, Shigeru Suzue, Hajime Kishi, Takeji Nakae, Akimitsu Matsusaki
Life of this patent
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Abstract
Tough laminated composite material which comprise (A) long reinforcing fibers, (B) a matrix resin mixed with the long reinforcing fibers and (C1) a resin, preferably in the form of fine resin particles, forming a phase separate from said matrix resin which is localized in inter-layer zones, wherein 90% or more of said resin (C1) is localized in inter-layer zones and/or wherein the border length factor in the inter-layer zones is 2.5 or more and prepegs used to form the composite materials.
Claims37
A tough laminated composite material, comprising:
- (A) at least two lamination layers comprising high strength long reinforcing fibers;
- (B) a matrix resin which is at least in part thermosetting mixed with said reinforcing fibers;
- and
- (C1) thermoplastic resin particles independently dispersed in a matrix resin or partially integrated with each other in a matrix resin, wherein 90% or more of said particles are localized in inter-layer zones which have a thickness which is 30% of the thickness of said lamination layers, wherein the border length factor in said inter-layer zones is 2.5 or more.
A tough laminated composite material formed of a plurality of lamination layers, comprising:
- (A) a plurality of layers of carbon or graphite reinforcing fibers having a length of 5 cm or more which have a tensile strength of at least 450 kgf/mm.sup.2 and a tensile elongation of at least 1.6%, said reinforcing fibers within each layer being arranged in a single direction;
- (B) a matrix resin formed of thermosetting resin or a mixture of thermosetting resin and a thermoplastic resin impregnated in said layers of reinforcing fibers;
- and
- (C1) a layer of fine thermoplastic resin particles dispersed in said matrix resin having an average particle diameter of 0.5 to 60 microns which forms an inter-layer zone located between at least two of said layers of said reinforcing fibers, wherein 90% or more of said particles are localized in inter-layer zones which have a thickness which is 30% of said lamination layer and the border length factor in said inter-layer zones is 2.5 or more.
A prepreg suitable for use in a laminated composite material, comprising:
- (A) high strength long reinforcing fibers;
- (B) a matrix resin which is at least in part thermosetting mixed with said reinforcing fibers;
- and
- (C2) fine thermoplastic resin particles dispersed in a matrix resin wherein 90% or more of said particles are localized near a surface of the prepreg within a depth which is 30% of the thickness of the prepreg from the surface of the prepreg.
Dependencies are inferred from the claim text.