Laminated glazing with improved impact strength

Details Laminated glazing with improved impact strength Laminated glazing with improved impact strength

1991-10-21

1993-09-21

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428141, 428142, 428166, 428198, 4284248, 4284256, 428437, 428441, B32B 2714

Patent

active

052467643

ABSTRACT:
A laminated glazing unit having improved impact strength comprising a), b) and c) in sequence: a) a glass layer; b) a plasticized layer containing partial polyvinyl butyral; c) another glass layer; and d) means, preferably a multiplicity of spaced projections, dispersed on the surface of at least one of the foregoing layers, preferably the plasticized layer, capable of resisting adhesion to the layer with which it is in contact, the area without said dispersed means (e.g. between projections) of the layer having such dispersed means having high affinity for adhesion to the layer with which it is in contact, such laminated glazing at a specific pummel adhesion having a greater mean break height than that of a laminated glazing containing layers a) b) and c) but without d). The dispersed means may be on the surface of a glass layer but is preferably on the plasticized layer.

REFERENCES:
patent: 2739080 (1956-03-01), Woodworth
patent: 3554835 (1971-01-01), Morgan
patent: 3591406 (1971-07-01), Moynihan
patent: 3881043 (1975-04-01), Rieser et al.
patent: 4035549 (1977-07-01), Kennar
patent: 4452840 (1984-06-01), Sato et al.
patent: 4747896 (1988-05-01), Anastasie
patent: 4948672 (1990-08-01), Cartier
patent: 4952457 (1990-08-01), Cartier et al.
patent: 5061535 (1991-10-01), Kreckel et al.
patent: 5091258 (1992-02-01), Moran

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