| 摘要 |
PROBLEM TO BE SOLVED: To eliminate perforation at a prepreg by using a glass fiber woven fabric having a specific thickness and a specific aspect ratio of an air gap part of an interstice. SOLUTION: An aspect ratio is obtained by n/m from a thickness (n) and a width (m) of an air gap part 2 of an interstice of the glass fiber woven fabric 1, and the m is a size of a longest side of the part 2. At the time of using the thick glass fiber woven fabric, a thickness of a resin 3 filling the part 2 is large, and hence no perforation occurs in the case of evaporating a solvent in the resin. It means to set the aspect ratio to 0.4 or more in the fabric having a thickness of 60μm or less than the thickness of the part 2 is relatively increased to the size of the part 2. Thus, since the thickness of the resin 3 filling the part 2 becomes relatively large, no perforation occurs, and an external appearance of the prepreg is upgraded. And, voids at the time of forming a laminate by using the prepreg can be reduced.
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