a laminated glazing unit composed of an improved polymer interlayer composite interposed between two glass sheets and its method of manufacture are disclosed . the improved interlayer contains various layers with appropriate thicknesses of silane primer , poly and poly arranged and bonded together in a particular fashion to increase the fragment retention capabilities of the laminated glazing while also improving the overall penetration resistance and safety characteristics of the structure without increasing the rigidity to a point where it poses a safety threat to the occupant .