GLASS FIBER HAVING IRREGULAR SHAPED CROSS-SECTION AND METHOD FOR MANUFACTURING GLASS FIBER HAVING IRREGULAR SHAPED CROSS-SECTION

摘要

To improve mechanical material properties of a glass fiber reinforced composite material.SOLUTION: The glass fiber has four or more protrusions 12 formed at an interval in the circumferential direction of a cross section. When the cross section is rotated at an angle of (360/n)° (n is an integer of 4 or more and a number corresponding to the number of the protrusions 12) around the centroid O of the cross section in the glass fiber, a ratio A2/A1 of the area A1 of the cross section before rotation to the area A2 of a portion overlapped by the cross section before rotation and a cross section after rotation is 0.7 or more, and the circumferential length of the cross section is 20 μm or more and 200 μm or less.SELECTED DRAWING: Figure 6