Glass laminates having improved structural integrity against severe impacts comprising a flexible attachment
View Patent ↗This invention comprises a glazing element having a transparent laminate secured to a structural support, and a process for preparing the same. The laminate comprises at least one layer of glass having self-adhered directly to the layer of glass a layer of thermoplastic polymer having low haze, wherein the layer of thermoplastic polymer is attached to the structural support along the edges of the laminate.
1. A glazing element comprising:
a transparent laminate comprising at least one layer of glass bonded to an interlayer of an ionomer resin having low haze, a portion of the ionomeric interlayer being exposed,
wherein said ionomer resin consists essentially of a water insoluble sodium salt of a polymer of ethylene and methacrylic acid or acrylic acid containing 14-24% by weight of the acid and having about 10-80% by weight of the acid neutralized with sodium ion and the ionomer resin has a melt index of about 0.5-50 grams/10 min; and
a composite attachment connected between the laminate and a support structure, the composite attachment comprising
a flexible mesh wherein at least a portion thereof is substantially entirely impregnated with a ionomeric material that is compatible with the interlayer,
the portion of the flexible mesh impregnated with the ionomeric material being bonded to a predetermined length of the exposed portion of the interlayer thereby to form a strong adhesively connected mass,
wherein the composite attachment having the impregnating ionomeric material undergoes an elongation of no more than about 0.5 inches when a tensile force-per-bonded-length in the range from about two hundred to about three hundred fifty pounds-inch is imposed on the composite attachment.
2. The glazing element of claim 1 wherein the interlayer has a dimension that is greater than the dimension of the glass such that the exposed portion of the interlayer defines a planar surface having a planar dimension that is greater than its thickness, and wherein
the portion of the flexible mesh impregnated with the ionomeric material is facially bonded to the planar exposed portion of the interlayer.
3. The glazing element of claim 1 wherein the interlayer and the glass each have an edge, and wherein
the edges of the interlayer and the glass are aligned with each other such that the edge of the interlayer defines the exposed portion of the interlayer, and wherein
the portion of the flexible mesh impregnated with the ionomeric material is bonded to the edge of the interlayer.
4. The glazing element of claim 1 wherein the flexible mesh is fabricated from a polyaramide material.
5. The glazing element of claim 1 wherein the flexible mesh has a warp component and a weft component, wherein one of the components extends parallel to the exposed portion of the interlayer and the other component extends perpendicular to the exposed portion of the interlayer.
6. The glazing element of claim 1 wherein the flexible mesh has a warp component and a weft component, wherein both of the components extend at an angle of about forty-five degrees with respect to the exposed portion of the interlayer.