| 摘要 |
<p>1517391 Flash lamp arrays GENERAL ELECTRIC CO 13 Aug 1975 [18 Sept 1974] 33742/75 Heading G2X A multi-lamp photo-flash array includes a cover made of a light-transmitting polymodal resinous branched block butadiene styrene copolymer containing from 70 to 95 weight per cent styrene. The cover is strong and resistant to fracture in the event of a flash-lamp exploding and has a Vicat softening point of approximately 200‹F, 90 to 95% transmission, an Izod impact strength of about 0À4 foot pounds/inch notch, a modulus of elasticity of 200,000 psi and a 100% elongation at a tensile pull rate of approximately 0À2 inches/minute.</p> |
