Fiber reinforced resin assembly
View Patent ↗An uncured fiber reinforced assembly that includes a reinforcement layer containing a fibrous material and at least one highly reactive curing agent. A matrix film layer is applied to the reinforcement layer so that it does not substantially impregnate the reinforcement layer. The matrix film layer includes at least one uncured epoxy resin and at least one latent epoxy curing agent. The assembly is designed for use in making snowboards and skis.
1. A composite structure comprising an uncured fiber reinforced assembly that has been cured to form said composite structure wherein said uncured fiber reinforced assembly comprises:
a reinforcement layer having a first surface and a second surface that define the thickness of said reinforcement layer, said reinforcement layer comprising a fibrous material and at least one highly reactive curing agent;
a matrix film layer applied to at least part of said first or second reinforcement layer surfaces wherein said matrix film layer comprises at least one uncured epoxy resin and at least one latent epoxy curing agent and wherein said matrix film layer impregnates said reinforcement layer by less than 10% of the thickness of said reinforcement layer.
2. A composite structure according to claim 1 wherein said matrix film layer impregnates the reinforcement layer by less than 5% of the thickness of said reinforcement layer.
3. A composite structure according to claim 1 wherein said matrix film layer has a minimum viscosity of 100 Pas at ambient temperature.
4. A composite structure according to claim 1 wherein said fibrous material is selected from the group of fibers consisting of synthetic fibers, natural fibers, hybrid fibers, mixed fibers, stretch-broken fibers and selectively discontinuous fibers.
5. A composite structure according to claim 1 wherein said matrix film layer comprises one or more additional ingredients selected from the group consisting of flexibilizers, toughening agents, accelerators, thermoplastics, core shell rubbers, flame retardants, wetting agents, pigments/dyes, ultra-violet absorbers, anti-fungal compounds, fillers, toughening particles and viscosity modifiers.
6. A composite structure according to claim 1 wherein said composite structure is a snowboard or ski.
7. A composite structure according to claim 2 wherein said composite structure is a snowboard or ski.
8. A composite structure according to claim 3 wherein said composite structure is a snowboard or ski.
9. A composite structure according to claim 4 wherein said composite structure is a snowboard or ski.
10. A composite structure according to claim 5 wherein said composite structure is a snowboard or ski.
11. A snowboard or ski that comprises a composite structure comprising an uncured fiber reinforced assembly that has been cured to form said composite structure wherein said uncured fiber reinforced assembly comprises:
a reinforcement layer having a first surface and a second surface that define the thickness of said reinforcement layer, said reinforcement layer comprising a fibrous material and at least one highly reactive curing agent;
a matrix film layer applied to at least part of said first or second reinforcement layer surfaces wherein said matrix film layer comprises at least one uncured epoxy resin and at least one latent epoxy curing agent and wherein said matrix film layer does not substantially impregnate said reinforcement layer.