Recyclable Blister Pack and Process of Making

Abstract

A recyclable blister pack system is provided, including a substrate having a dry tack cohesive adhesive layer deposited on one of its surfaces and a blister layer for receiving a product. The properties of the dry tack cohesive are selected so the blister layer is separable from the substrate without leaving substantial substrate residue on the blister layer. This improves the recyclability of the blister layer.

What is claimed is: 
     
         1 . A tamper-resistant, multi-piece package comprising:
 a fibrous substrate comprising:
 a first region including a planar, unprinted side and a printed side opposite the unprinted side; 
 a second region including a planar, unprinted side and a printed side opposite the unprinted side; and 
 an opening passing through the second region; 
   a dry-tack coadhesive layer located on opposing portions of the unprinted sides of both the first and second regions of the fibrous substrate, respectively, wherein the coadhesive is an aqueous material that is configured to dry as a coadhesive after application to the substrate; and   a blister layer including a central region configured to accept a product and a peripheral flange surrounding the central region;   wherein the opposing portions of the unprinted sides of the first region and of the second region are brought together such that opposing portions of the dry-tack coadhesive layer are sealed to each other;   wherein the peripheral flange of the blister layer is captured between the opposing portions of the dry-tack coadhesive layer without the dry-tack coadhesive adhering to the peripheral flange of the blister layer.   
     
     
         2 . The tamper-resistant, multi-piece package of  claim 1  wherein the second region includes a sealing area extending between an outer perimeter of the second region and the opening, the sealing area surrounding the opening, wherein a width of sealing area between the opening and outer perimeter of the second region is at least one inch. 
     
     
         3 . The tamper-resistant, multi-piece package of  claim 2  wherein the central region of the blister layer extends out of the opening and past the printed side of the second region, wherein the peripheral flange has a width that is less than the width of the sealing area. 
     
     
         4 . The tamper-resistant, multi-piece package of  claim 2  wherein the first region includes an outer perimeter, wherein the unprinted side of the first region is a planar inner surface extending uninterrupted and bounded by the outer perimeter of the first region. 
     
     
         5 . The tamper-resistant, multi-piece package of  claim 3  wherein the first region includes a second opening passing through the first region, wherein the planar inner surface of the first region includes a sealing area extending between the outer perimeter of the first region and the second opening, wherein a width of sealing area between the second opening and outer perimeter of the first region is at least one inch. 
     
     
         6 . The tamper-resistant, multi-piece package of  claim 1  wherein the coadhesive layer includes a uniform layer of coadhesive on the unprinted side of the second region surrounding the opening. 
     
     
         7 . The tamper-resistant, multi-piece package of  claim 1  wherein the first region and second region are rectangular pieces of fibrous substrate, wherein the opening is offset from a center point of second region in at least one direction. 
     
     
         8 . The tamper-resistant, multi-piece package of  claim 1  wherein the blister layer is made of recycled polyethylene terephthalate, wherein the substrate is made from a corrugated material. 
     
     
         9 . The tamper-resistant, multi-piece package of  claim 1  wherein the dry-tack coadhesive of the dry-tack coadhesive layer comprises a latex rubber coadhesive capable of adhesion by pressure produced by manual force without heating. 
     
     
         10 . The tamper-resistant, multi-piece package of  claim 1  wherein the fibrous substrate includes a foldable centerline joining the first region and the second region. 
     
     
         11 . A multi-piece package comprising:
 a fibrous substrate comprising:
 a first region including a planar inner surface and an outer surface opposite the inner surface; 
 a second region including a planar inner surface and an outer surface opposite the inner surface; and 
 an opening passing through the second region; 
 wherein the inner surfaces of the first region and the second region are unprinted; 
   a coadhesive layer located on opposing portions of the inner surfaces of both the first and second regions of the fibrous substrate, wherein the coadhesive layer includes a uniform layer of coadhesive on the inner surface of the second region surrounding the opening; and   a plastic layer including a central region configured to accept a product and a peripheral flange surrounding the central region;   wherein the opposing portions of the inner surfaces of the first region and of the second region are brought together such that opposing portions of the coadhesive layer are sealed to each other;   wherein the central region of the plastic layer extends out of the opening and past the outer surface of the second region, wherein the peripheral flange of the plastic layer is captured between the opposing portions of the coadhesive layer without the coadhesive adhering to the plastic layer.   
     
     
         12 . The multi-piece package of  claim 11  wherein the second region includes a sealing area extending between an outer perimeter of the second region and the opening, the sealing area surrounding the opening, wherein a width of sealing area between the opening and the outer perimeter of the second region is at least one inch. 
     
     
         13 . The multi-piece package of  claim 12  wherein the planar inner surface of the first region extends uninterrupted and is bounded by the outer perimeter of the first region, wherein the uniform layer of coadhesive on the inner surface of the second region coats the inner surface of the second region. 
     
     
         14 . The multi-piece package of  claim 13  wherein the first region includes a second opening passing through the first region, wherein the planar inner surface of the first region is a sealing area extending between the outer perimeter of the first region and the second opening, wherein a width of sealing area between the second opening and outer perimeter of the first region is at least one inch. 
     
     
         15 . The multi-piece package of  claim 13  wherein the central region of the plastic layer extends out of the opening and past the outer surface of the second region, wherein the peripheral flange has a width that is less than the width of the sealing area. 
     
     
         16 . The multi-piece package of  claim 11  wherein the plastic layer is made of recycled polyethylene terephthalate, wherein the substrate is made from a corrugated material. 
     
     
         17 . The multi-piece package of  claim 11  wherein the coadhesive of the coadhesive layer comprises an aqueous latex rubber coadhesive capable of adhesion by pressure produced by manual force without heating, wherein the aqueous latex rubber coadhesive has a ratio of viscosity at one revolution per minute to viscosity at 50 revolutions per minute of approximately 14 to 1. 
     
     
         18 . The multi-piece package of  claim 11  wherein the fibrous substrate includes a foldable centerline joining the first region and the second region. 
     
     
         19 . A multi-piece package comprising:
 a fibrous substrate comprising:
 a first region including an outer perimeter, a planar inner surface and a planar outer surface opposite the inner surface, wherein the planar inner surface extends uninterrupted between opposing portions of the outer perimeter such that the planner inner surface is bounded by the outer perimeter of the first region; 
 a second region including an outer perimeter, a planar inner surface and a planar outer surface opposite the inner surface; 
 an opening passing through the second region, wherein the second region includes sealing area extending between the outer perimeter of the second region and the opening, the sealing area surrounding the opening, wherein a width of sealing area between the opening and outer perimeter of the second region is at least one inch; 
 wherein the inner surfaces of the first region and the second region are unprinted; 
   a coadhesive layer located on opposing portions of the inner surfaces of both the first and second regions of the fibrous substrate, wherein the portion of the coadhesive layer on the second region surrounds the opening on the inner surface of the second region, wherein the coadhesive is an aqueous material that is configured to dry as a coadhesive after application to the substrate; and   a plastic layer including a central region configured to accept a product and a peripheral flange surrounding the central region, wherein the peripheral flange has a width that is less than the width of the sealing area;   wherein the opposing portions of the inner surfaces of the first region and of the second region are brought together such that opposing portions of the coadhesive layer are sealed to each other;   wherein the central region of the plastic layer extends out of the opening and past the outer surface of the second region, wherein the peripheral flange of the plastic layer is captured between the opposing portions of the coadhesive layer without the coadhesive adhering to the plastic layer.   
     
     
         20 . The multi-piece package of  claim 19  wherein the coadhesive of the coadhesive layer comprises a latex rubber coadhesive capable of adhesion by pressure produced by manual force without heating, wherein the peripheral flange has a width that is less than the width of the sealing area, wherein the first region and second region are rectangular pieces of fibrous substrate, wherein the opening is offset from a center point of second region in at least one direction.