safety glass


safety glass
a pane made by joining two plates or panes of glass with a layer of usually transparent plastic or artificial resin between them that retains the fragments if the glass is broken.
[1920-25]

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      type of glass that, when struck, bulges or breaks into tiny, relatively harmless fragments rather than shattering into large, jagged pieces. Safety glass may be made in either of two ways. It may be constructed by laminating two sheets of ordinary glass together, with a thin interlayer of plastic, or it may be produced by strengthening glass sheets by heat treatment.

      In 1909 the first successful patent for safety glass was taken out in France by an artist and chemist, Édouard Bénédictus, who used a sheet of celluloid bonded between two pieces of glass. Other plastics were also tried, but in 1936 polyvinyl butyral (PVB) was found to possess so many safety-desirable properties that its use became universal. Bulletproof glass is usually built up using several glass and plastic components.

      In the heat-treatment method, glass sheets are tempered at about 650° C (1200° F), followed by sudden chilling. This treatment increases the strength of the glass sheets approximately sixfold. When such glass does break, it shatters into blunt granules.

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Universalium. 2010.

Look at other dictionaries:

  • safety glass — safety ,glass noun uncount 1. ) a strong type of glass that breaks into very small pieces that are not sharp 2. ) a type of glass that will not break into separate pieces if it is damaged …   Usage of the words and phrases in modern English

  • safety glass — n. glass made to be shatterproof by fastening together two sheets of glass with a transparent, plastic substance between them …   English World dictionary

  • safety glass — n [U] strong glass that breaks into very small pieces that are not sharp, used for example in car windows …   Dictionary of contemporary English

  • safety glass — ► NOUN ▪ glass that has been toughened or laminated so that it is less likely to splinter when broken …   English terms dictionary

  • Safety Glass — Запасное стекло Safety Glass Жанр Драма Режиссёр Джонатан Глатзер Автор сценария Джонатан Глатзер Роберт Лоусон …   Википедия

  • safety glass — noun glass made with plates of plastic or resin or other material between two sheets of glass to prevent shattering • Syn: ↑laminated glass, ↑shatterproof glass • Hypernyms: ↑glass * * * noun [noncount] : a type of strong glass that breaks into… …   Useful english dictionary

  • safety glass — beskeveldris stiklas statusas T sritis chemija apibrėžtis Stiklas, kuris nuo smūgio nesubyra arba sudūžta į neaštrius gabaliukus. atitikmenys: angl. laminated glass; non shatterable glass; nonshatterable glass; non splintering glass;… …   Chemijos terminų aiškinamasis žodynas

  • safety glass — {n.} Two panes of glass with a sheet of plastic between them so that the glass will not break into pieces. * /Safety glass is used in cars because it does not break into pieces./ …   Dictionary of American idioms

  • safety glass — {n.} Two panes of glass with a sheet of plastic between them so that the glass will not break into pieces. * /Safety glass is used in cars because it does not break into pieces./ …   Dictionary of American idioms

  • safety\ glass — noun two panes of glass with a sheet of plastic between them so that the glass will not break into pieces. Safety glass is used in cars because it does not break into pieces …   Словарь американских идиом


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