Light Transmission Properties of Insert Molded GFRPs with Different Crape Structure of Silk Fabrics

In this research, the hand lay-up method was focused as one of the decoration molding techniques for the GFRP lighting materials. The hand lay-up method can be more developed in the market of the GFRP lighting material because type of form and reinforced material are free to be selected in this method. Therefore, this research aimed to clearly the light transmission property of the GFRP inserted the Kyo Yu-zen fabric with crape. The cross section structure, light transmission property and luminance distribution of the GFRP samples were analyzed. As the results of this research, it was confirmed that the structure of the GFRP inserted the silk fabric with crape was different in each sample according to a laid direction of the yarn and use of the laid yarn, the GFRP inserted the silk fabric with crape had more profound effect on a dispersion of the light with the luminous intensity and the luminance than the GFRP with only glass mat, and a degree of the dispersion of the light was changed by the structure of the crape, and it was the highest in the Silk4 showed the highest Ra value.