Interlayer for laminated safety glass
AssigneeMonsanto Company
InventorGeorge A. Kennar
Life of this patent
Estimating the term…
Abstract
Disclosed herein is an improved interlayer for laminated safety glass. The improved interlayer is characterized by having at least one surface which is more printable without sacrificing the surface roughness required to prevent blocking of the sheet and to facilitate de-airing of laminates prepared from the interlayer.
Claims9
An interlayer for laminated safety glass wherein at least one surface of the interlayer is characterized by having:
- A. an Arithmetic Average roughness in the range of from 12 to 18.times. 10.sup.-.sup.5 inches as calculated around a roughness mean centerline drawn through the peaks and valleys on the surface of the interlayer;
- B. a Roughness Height in the range of from 48.times. 10.sup.-.sup.5 to 72.times. 10.sup.-.sup.5 inches;
- wherein at a distance of 0.4 mil or less from the mean centerline going in the direction to the center of the interlayer there are substantially no valleys on the surface of the interlayer.
A plasticized polyvinyl butyral interlayer for laminated safety glass wherein the polyvinyl butyral contains from 9 to 25 percent by weight of hydroxyl groups calculated as polyvinyl alcohol and 0 to 3 percent by weight of acetate groups calculated as polyvinyl acetate wherein at least one surface of the interlayer is characterized by having:
- A. an Arithmetic Average roughness in the range of from 12 to 18.times. 10.sup.-.sup.5 inches as calculated around a roughness mean centerline drawn through the peaks and valleys on the surface of the interlayer;
- B. a Roughness Height in the range of from 48.times.10.sup.-.sup.5 to 72.times. 10.sup.-.sup.5 inches;
- wherein at a distance of 0.4 mil or less from the mean centerline going in the direction to the center of the interlayer there are substantially no valleys on the surface of the interlayer.
A plasticized polyvinyl butyral interlayer for laminated safety glass wherein the polyvinyl butyral contains from 9 to 25 percent by weight of hydroxyl groups calculated as polyvinyl alcohol and 0 to 3 percent by weight of acetate groups calculated as polyvinyl acetate having a gradient band printed thereon wherein the printed surface of the interlayer is characterized by having:
- A. an Arithmetic Average roughness in the range of from 12 to 18.times. 10.sup.-.sup.5 inches as calculated around a roughness mean centerline drawn through the peaks and valleys on the surface of the interlayer;
- B. a Roughness Height in the range of from 48.times. 10.sup.-.sup.5 to 72.times. 10.sup.-.sup.5 inches;
- wherein at a distance of 0.4 mil or less from the mean centerline going in the direction to the center of the interlayer there are substantially no valleys on the surface of the interlayer.
Dependencies are inferred from the claim text.