Method of making a retroreflective laminate

Details Method of making a retroreflective laminate Method of making a retroreflective laminate

1976-08-12

1978-08-01

Smith, Ronald H.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156300, 156332, 350104, 350105, 428 40, 428325, 428913, 427 25, 427 27, 427 32, 427163, 427204, B05D 506, B32B 3100

Patent

active

041041020

ABSTRACT:
The laminate includes a partially cured, flexible acrylic face sheet having a primer layer on one surface thereof bonded to a binder layer having a layer of reflective glass beads embedded therein and protruding therefrom and a sealer layer on the exposed surfaces of the glass beads, the laminate being completed with a spacer layer bonded to the sealer layer and having a reflective mirror-like thin metal coating on the outer surface thereof. The binder layer, sealer layer and spacer layer, or films are all made from basically the same uncured polyvinyl butyral material. The method of forming the acrylic face layer, the use of soft rubber pressure rolls in bonding a glass bead carrying partial laminate to a preformed spacer film, and the method of making the laminate of the invention and the compositions used therein.

REFERENCES:
patent: 2543800 (1951-03-01), Palmquist et al.
patent: 2555715 (1951-06-01), Tatum
patent: 2646364 (1953-07-01), Porth
patent: 3172942 (1965-03-01), Berg
patent: 3236677 (1966-02-01), Bradstreet
patent: 3309257 (1967-03-01), Borack
patent: 3331729 (1967-07-01), Danielson et al.
patent: 3567307 (1971-03-01), Rideout et al.
patent: 3702213 (1972-11-01), Schwab
patent: 3934065 (1976-01-01), Tung
patent: 3936567 (1976-02-01), Vessely

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