Laminated composite sheet packaging material

A substantially opaque printed heat sealable composite sheet material suitable for use as a packaging material and characterized by versatility of graphic design and color selection, said sheet material comprising, in combination:

• a front film of transparent oriented polypropylene,
• a rear film of pigmented polyethylene of a predetermined color having a readily heat sealable outer surface,
• an intermediate film of substantially opaque pigmented polyethylene positioned between said front film and said rear film and serving to increase the opacity of the sheet material and
• a layer of printing between said front transparent film and said intermediate substantially opaque film and visible on the outer surface of the sheet material, with the underlying intermediate film serving to enhance the brightness and purity of color of the layer of printing.

A substantially opaque printed heat sealable composite sheet material suitable for use as a packaging material and characterized by versatility of graphic design and color selection, said sheet material being about three to six mils in thickness and comprising, in combination:

• a preformed front film of transparent biaxially oriented polypropylene,
• a layer of printing tightly adhered to the inner surface of said front film and visible on the outer surface of the film,
• a preformed rear film of heat sealable pigmented polyethylene,
• a preformed intermediate film of pigmented polyethylene positioned between said front film and said rear film and serving to increase the opacity of the sheet material and enhance the brightness and purity of color of said layer of printing,
• a layer of adhesive securely bonding the printed inner surface of said front film to one surface of said intermediate film, and
• a layer of adhesive securely bonding the inner surface of said rear film to the opposite surface of said intermediate film.

A substantially opaque, printed heat sealable composite sheet material suitable for use in forming flexible pouches, bags, and similar packages and characterized by versatility of graphic design and color selection, said sheet material comprising, in combination:

• a preformed front film of transparent biaxially oriented polypropylene of a thickness of about three-fourths mil,
• a layer of printing tightly adhered to the inner surface of said front film and including printed indicia of at least one predetermined color over certain areas of the inner surface of said front film and a printed background over other areas of the inner surface of said front film, said background being of a predetermined color contrasting to the color of said printed indicia,
• a preformed rear film of heat sealable polyethylene of a thickness of about one and one-half mils and being pigmented a color substantially matching the predetermined color of said printed background,
• a preformed intermediate film of substantially opaque white pigmented polyethylene of a thickness of about two mils having the opposite surfaces thereof treated to promote bonding, said intermediate film being tightly bonded to the printed inner surface of said front film and to the inner surface of said rear film and serving as a masking layer to increase the opacity of the sheet material and to prevent the color of said rear film from affecting the purity of color of said printed indicia.