| 摘要 |
A curable prepreg ply formed by applying two outer resin films to the top and bottom surfaces, respectively, of a layer of resin-impregnated reinforcement fibers. The outer resin films contains insoluble toughening particles, and partially soluble or swellable toughening particles, but the resin matrix which impregnates the reinforcement fibers does not contain the same toughening particles. The insoluble toughening particles are insoluble in the resin matrix of the resin films upon curing of the prepreg ply. The partially soluble or swellable toughening particles are partially soluble or swellable in the resin matrix of the resin films upon curing of the prepreg ply, but remain as discreet particles after curing. |
| 主权项 |
1. A curable prepreg ply comprising:
a layer of resin-impregnated reinforcement fibers having a top surface and a bottom surface; two resin films applied to the top surface and the bottom surface of said layer, respectively, wherein said layer of resin-impregnated reinforcement fibers comprises reinforcement fibers impregnated with a first curable resin matrix, and said resin films comprises a second curable resin matrix, said second curable resin matrix comprises at least one thermoset resin, and a mixture of two different types of particles: (i) insoluble toughening particles, and (ii) partially soluble or swellable toughening particles, and said first curable resin matrix comprises at least one thermoset resin, but is void of said insoluble toughening particles and said partially soluble or swellable toughening particles, and wherein said insoluble toughening particles are insoluble in the second resin matrix upon curing of the prepreg ply, and said partially soluble or swellable toughening particles are partially soluble or swellable in the second resin matrix upon curing of the prepreg ply, but remain as discreet particles after curing.
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