◆1865 the year on August 1, American T.D.Stefson obtained most early has published the spatial glass patent.
◆ spatial glass because its remarkable heat-insulated, the heat preservation, the energy conservation, sound-insulated, security comfortableness, guard against the glazed frost, guard against the dust pollution, the process more than 100 years development, obtained the widespread application to this century 50's in the world.
◆ the spatial glass in applications and so on Europe, North America, Japan, South Korea is common.
◆ the Reich government regulations, all buildings must use the spatial glass completely, the prohibition use the simple glass to make the windowpane.
◆ Japanese Government stipulated that, Hokkaido and so on the cold area all uses the spatial glass.
◆ in the North America area window the spatial glass amount used surpasses 95%.
◆ in China the spatial glass annual output has amounted to more than 200 ten thousand square meters now, but although because in the present traditional trough aluminum spatial glass product the performance is good, but the construction cost is expensive, only has the few uses in the upscale construction, with difficulty big area promotion.
◆ the present three norths area use broad so-called “conserves energy double Bolivia”, only is does not have the seal, heat-insulated still permissible two glass simple isolation, although the price is inexpensive, but the leak-proof quality misses extremely, the extremely easy rime, by the dust pollution, after to pass through section of short times namely not to be possible to use, as a result of these own flaws, its promoted application is restricted.
◆ the spatial glass is the double-glazed window one kind of development product, is two or two above glass nearby seals in together, between the glass forms the static dry gas heat insulation space the overall glass structure.The static gas insulating layer thermal conductivity all lowers compared to any material, therefore the spatial glass has the prominent heat insulation, sound-insulated, the anti-glazed frost condensation performance.