| 单词 |
microballoon |
| 释义 |
microballoon, n.|ˈmaɪkrəʊbəluːn|
Also Microballoon.
[f. micro- 1 a + balloon n.]
An artificial hollow microsphere, usu. of glass or synthetic resin, esp. one of a kind used in bulk as an insulating material.
A proprietary term in the U.S.
1954Official Gaz. (U.S. Patent Office) 27 Apr. 873/1 Microballoon. For hollow, finely divided, hole-free, low density particles of synthetic resins and/or similar film-forming materials for general use in the industrial arts. Claims use since about Sept. 11, 1950. 1967Amer. Ceramic Soc. Bull. XLVI. 442/2 Glass microballoon particles are tiny, hollow, hole-free spheres having a true particle density of about 22 lbs/cu ft and a bulk density of 15 lbs/cu. ft. Ibid. 594/2 The microballoons varied in form from perfect spheres to a teardrop shape. 1977Offshore Engineer June 72/3 Developed as a deepsea buoyancy material, Eccofloat FL..is a composite of hollow epoxy macrospheres (average diameter 9.5mm) and matrix of glass microballoon spheres (average diameter 60 microns) mixed with epoxy resin. 1980Bent & McKinley Aircraft Maintenance & Repair (ed. 4) ix. 262/2 The effect of microballoons added to potting resin is to produce a lighter-weight and more resilient repair. 1989WoodenBoat Dec. 33/1 Unlike dry, ‘fly-away’ fillers like microballoons,..particles are treated with a special coating that allows them to blend with the epoxy quickly and easily. |
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