MULTILAYER GLASS AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2016 - IPC C03C27/12 B32B17/06 

FIELD: glass.

SUBSTANCE: invention relates to multilayer glass. Multilayer glass is made from a plurality of glass sheets joined by intermediate layer. Among multiple glass sheets, at least two glass sheets are thick glass sheet and thin glass sheet. At any temperature between temperature of annealing and softening temperature the thick glass sheet has lower viscosity than the thin glass sheet. Two glass sheets of different thickness satisfy the formula 1<y<(1.22-0.206×x) and formula 1<z<(1.15-0.131×x), where x (x = t2/t1) is a ratio of thickness (t2) of thin glass sheet to thickness (t1) of thick glass sheet at room temperature; y (y=lg₁₀η2/lg₁₀η1) represents a relation of logarithm (lg₁₀η2) of thin glass sheet viscosity to logarithm (lg₁₀η1) of thick glass sheet viscosity at annealing temperature for the thick glass sheet; z (z=lg₁₀η4/lg₁₀η3) is a relation of logarithm (lg₁₀η4) of thin glass sheet viscosity to logarithm (lg₁₀η3) of thick glass sheet viscosity at melting temperature for the thick glass sheet.

EFFECT: technical result of invention is improvement of bending accuracy.

13 cl, 10 dwg, 3 tbl