Method for producing retroreflective sheeting using a coupling a

Details Method for producing retroreflective sheeting using a coupling a Method for producing retroreflective sheeting using a coupling a

1995-07-20

1998-10-20

Watkins, William

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428149, 428325, 428204, 428166, 428142, 156145, 156230, 156237, 156241, 156276, 156298, 359536, 359541, G02B 5128, B32B 3112

Patent

active

058243909

ABSTRACT:
The present invention provides a method for producing retroreflective sheeting useful for marking or the like of signs such as road signs and construction signs; number plates of vehicles such as motorcars and motorcycles; materials for safety such as clothes and life jackets; signboards, etc., and the method is a method for producing retroreflective sheeting, which comprises embedding glass beads substantially in a monolayer in a temporary support at least one surface of which is composed of a thermoplastic resin in such a manner that at least part of each bead is embedded in the thermoplastic resin; forming a vapor-deposited metal film on the surface in which the glass beads were embedded; superposing thereon a thermoformable support film; pressing the resultant superposed matter under heating to embed the vapor-deposited metal film portion of each of the glass beads in the support film; and peeling the temporary support from the superposed matter in such a manner that the glass beads remain in the support film, said method being characterized in that a thin film containing a coupling agent is previously formed on the vapor-deposited metal film of the temporary support in which the glass beads are embedded and on which the vapor-deposited metal film is then formed, and then the support film is superposed thereon.

REFERENCES:
patent: 3867178 (1975-02-01), Mitter et al.
patent: 4756931 (1988-07-01), Giordano et al.
patent: 5139875 (1992-08-01), Metzemacher et al.
patent: 5283101 (1994-02-01), Li
patent: 5411768 (1995-05-01), Knell et al.

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