초록 ▼

A light-weight, highly rigid, high-strength environment-friendly fiber-reinforced plastic (hereinafter, CFRP) board having a surface quality that can endure long-term use suitable for use in automobiles and the like is provided. A method for making the same is also provided. The CFRP board includes

A light-weight, highly rigid, high-strength environment-friendly fiber-reinforced plastic (hereinafter, CFRP) board having a surface quality that can endure long-term use suitable for use in automobiles and the like is provided. A method for making the same is also provided. The CFRP board includes a board member formed from a woven fabric as a reinforcing base material, the woven fabric including carbon fibers; and at least one of a gel coat and a paint provided on the board member, wherein the NSIC value of the surface of the CFRP board is 30% or more.

대표청구항 ▼

The invention claimed is: 1. A CFRP board made by an RTM method comprising: a carbon fiber reinforced plastic member (CFRP) comprising a woven fabric as a reinforcing base material, the woven fabric comprising carbon fibers, wherein the ratio (W/t) of the weight (Wg/m2) to the thickness (tmm) of th

The invention claimed is: 1. A CFRP board made by an RTM method comprising: a carbon fiber reinforced plastic member (CFRP) comprising a woven fabric as a reinforcing base material, the woven fabric comprising carbon fibers, wherein the ratio (W/t) of the weight (Wg/m2) to the thickness (tmm) of the carbon fiber woven fabric is within the range of 700 to 1,700, and resin having a viscosity prior to hardening of 300 mPa쨌s or less and a hardening shrinkage of 3% or less; and at least one of a gel coat and a paint provided on the member, wherein the A-value of a surface of the CFRP board is 30% or more. 2. The CFRP board according to claim 1, wherein the B-value of the surface of the CFRP board is 10% or more. 3. The CFRP board according to claim 1, wherein an X-value (%) of the surface of the CFRP board determined from the A-value and the B-value by Formula 1 is 40% or more: description="In-line Formulae" end="lead"X=0. 6횞A+0.4횞B (1).description="In-line Formulae" end="tail" 4. The CFRP board according to claim 1, wherein the CFRP board is an automobile component having a size of 0.1 to 50 m2. 5. The CFRP board according to claim 1, wherein the CFRP board is an automobile outer panel. 6. The CFRP board according to claim 1, wherein the cover factor of the carbon fiber woven fabric is 90 to 100%. 7. The CFRP board according to claim 1, wherein the carbon fiber woven fabric is located at an outermost layer of the board. 8. The CFRP board according to claim 1, formed from a mold having a surface roughness of 20 μm or less. 9. The CFRP board according to claim 1, wherein the thickness of the paint is in the range of 20 to 200 μm. 10. An automobile outer component made from the CFRP board of claim 1, wherein the hardening shrinkage coefficient of the resin is 3% or less. 11. The CFRP board according to claim 1, wherein the linear coefficient of expansion of the resin is 60횞10-6/째 C. or less. 12. An RTM method for making a CFRP board comprising: impregnating a woven fabric comprising carbon fibers with resin having a viscosity prior to hardening of 300 mPa쨌s or less and a hardening shrinkage of 3% or less; causing the resin to harden and form a board member comprising CFRP; and applying at least one of a gel coat or a paint on the board member, wherein the A-value of a surface of the CFRP board is 30% or more.