IMPROVEMENT OF REINFORCED PLASTICS
Quarterly progress rept. NO. 2 1 Oct-31 Dec 1961
GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV
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Significant improvements in manufacturing of hollow glass fibers and specimen fabrication produced extremely encouraging results. Tests on improved hollow glass fiber composites showed compressive strengths as high as 110,000 psi for A STRENGTH TO DENSITY RATIO OF OVER 2 MILLION INCHES. Similar solid fiber specimens demonstrated strength to density ratios only as high as 1.3 million inches. These results demonstrated increased structural efficiency through the reduction of material density. Continued development of hollow fiber manufacturing processes produced excellent configuration and uniformity of single fibers. Improved E-glass composition and impurity control eliminated the boiling difficulties observed earlier, negating the need for conversion from glass to quartz.