Encapsulated lens retroreflective sheeting
AssigneeAvery Dennison Corporation
InventorSeth Levenstein
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Abstract
Encapsulated-lens retroreflective sheeting is described which contains an improved binder layer. The binder layer is obtained from a film-forming mixture which comprises: (A) a vinyl chloride copolymer, (B) a thermoplastic polyurethane, and (C) an aminoplast resin. Such binder layer exhibits improved adhesion to metallized beads and to a variety of cover films such as acrylic films.
Claims35
Encapsulated-lens, retroreflective sheeting comprising a binder layer which is obtained from a film-forming mixture comprising:
- (A) a vinyl chloride copolymer,
- (B) a thermoplastic polyurethane, and
- (C) an aminoplast resin.
Encapsulated-lens, retroreflective sheeting comprising a binder layer which is obtained from a film-forming mixture comprising:
- (A) a vinyl chloride copolymer comprising a terpolymer of vinyl chloride and at least two other vinyl comonomers,
- (B) a thermoplastic polyurethane, and
- (C) an aminoplast resin.
An encapsulated-lens retroreflective sheeting comprising:
- (A) a binder layer which is obtained from a film-forming mixture comprising:
- (A-1) a vinyl chloride copolymer,
- (A-2) a thermoplastic polyurethane, and
- (A-3) an aminoplast resin,
- (B) a monolayer of lenses which is partially embedded in the binding layer,
- (C) a reflective layer underlying the lenses, and
- (D) a cover film overlying and sealed to the binding layer along a network of interconnecting lines forming sealed cells within which the lenses are encapsulated and have an air interface.
An encapsulated-lens retroreflective sheeting comprising:
- (A) a binder layer which is obtained from a film-forming mixture comprising:
- (A-1) a vinyl chloride copolymer comprising a terpolymer of a vinyl chloride, another vinyl compound, and an unsaturated carboxylic or polycarboxylic acid or ester,
- (A-2) a thermoplastic polyurethane, and
- (A-3) an aminoplast resin,
- (B) a monolayer of lenses which is partially embedded in the binding layer,
- (C) a reflective layer underlying the lenses, and
- (D) a cover film overlying and sealed to the binding layer along a network of interconnecting lines forming sealed cells within which the lenses are encapsulated and have an air interface.
An encapsulated-lens retroreflective sheeting comprising:
- (A) a base sheet that comprises a monolayer of retroreflective lenses partially embedded in a binder layer;
- (B) a cover sheet disposed in spaced relationship from and overlying the layer of retroreflective lenses;
- and
- (C) a network of intersecting bonds that extend between said cover sheet and said base sheet and comprise binder material thermo-formed at the point of contact between said bonds and said cover sheet to form a plurality of cells within which retroreflective lenses are hermetically sealed and to adhere the base sheet to the cover sheet, wherein the binder layer comprises a polymer obtained from a film-forming mixture comprising:
- (1) a vinyl chloride copolymer,
- (2) a thermoplastic polyurethane, and
- (3) an aminoplast resin.
An encapsulated-lens retroreflective sheeting comprising:
- (A) a base sheet that comprises a monolayer of retroreflective lenses partially embedded in a binder layer;
- (B) a cover sheet disposed in spaced relationship from and overlying the layer of retroreflective lenses;
- and
- (C) a network of intersecting bonds that extend between said cover sheet and said base sheet and comprise binder material thermo-formed at the point of contact between said bonds and said cover sheet to form a plurality of cells within which retroreflective lenses are hermetically sealed and to adhere the base sheet to the cover sheet, wherein the binder layer comprises a polymer obtained from a film-forming mixture comprising:
- (1) a vinyl chloride copolymer comprising a terpolymer of vinyl chloride, vinyl acetate, and an unsaturated carboxylic or polycarboxylic acid, or ester thereof,
- (2) a thermoplastic polyurethane, and
- (3) an aminoplast resin.
Dependencies are inferred from the claim text.