| 摘要 |
A glazing unit, including a composite glazing panel having a pair of vitreous sheets positioned parallel to one another and having respective marginal portions which face one another; an intervening layer which is comprised of polymeric material, which is sandwiched between the pair of vitreous sheets, and which has viscoelastic properties such that the composite glazing panel has a critical frequency of coincidence (or a lower or lowest critical frequency of coincidence if there is more than one), ( phi p) , which is greater than a critical frequency of coincidence of a notional monolithic vitreous sheet, ( phi m), the notional monolithic vitreous sheet having a shape and an area which are the same as that of the composite glazing panel and having a mass which is equal to the total mass of vitreous material in the composite glazing panel, and an adhesive material which is in contact with each vitreous sheet of the pair of vitreous sheets at at least the respective marginal portions thereof, and which is in contact with an outer face of at least one vitreous sheet of the pair of vitreous sheets at a marginal portion thereof, wherein the adhesive material exhibits, at 20 DEG C., an elongation of not more than 12.5% when subjected to a tensile stress of 0.1 MPa, as measured according to ISO 8339.
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