Word: polyvinyl
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Dates: during 1930-1939
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Safety glass is a double sheet with a transparent filler or binding layer between. In the old glass the filler was cellulose acetate. In the new it is polyvinyl acetal resin, a synthetic plastic made from acetylene. In an automobile this flexible, yielding pane is something like a transparent, moistureproof, windproof curtain. It is expected to cut down the number and seriousness of highway injuries due to sudden stops...