Insulated packaging material and pouch formed thereof
View Patent ↗An insulated packaging material includes a thermal insulating layer, which may a fiberfill batt. The batt is laminated to at least one facing layer of film, paper or fabric. The packaging material can be used as a container, such as a pouch. A food-contacting polymer material is applied to the facing layer to form the inner surface of the pouch. The packaging material may be coated on the outer facing layer with a coating material so that it is printable, thus imparting both insulating properties and print capability to the pouch.
1. An insulated packaging material, comprising:
a sheet of face material formed as a bi-layer film having a first layer and a second layer, wherein said second layer has a lower melting temperature than said first layer;
a polymer sealant layer applied to the first layer of the sheet; and
a thermal insulating layer comprising one or more materials selected from the group consisting of fiberfill batt, melt blown fibers, knit fabric, woven material, and fleece; the thermal insulating layer having a thermal resistance in the range of 0.05 to 0.5 CLO (0.0077 to 0.077 m 2 *K/W) laminated to the second layer of the sheet, to form the packaging material having a thickness in the range of 0.0075 inch (0.0190 cm) to 0.07 inch (0.1778 cm).
2. The insulating packaging material of claim 1 , wherein the polymer sealant layer is selected from the group consisting of polyethylene, polyester, and copolymers thereof.
3. The insulating packaging material of claim 1 , wherein the polymer sealant layer is applied to the face material as a coextruded web structure.
4. The insulating packaging material of claim 1 , further comprising a second sheet of face material formed as a bi-layer film having a first layer and a second layer, wherein said second layer has a lower melting temperature than said first layer, wherein said second sheet is laminated to the thermal insulating layer.
5. The insulating packaging material of claim 1 , further comprising a printable coating on the second sheet of face material.
6. An insulated pouch made of the insulated packaging material of claim 1 .
7. The insulated pouch of claim 6 , wherein the pouch defines a storage volume, and further comprising a fitment that facilitates access to the storage volume.
8. The insulated pouch of claim 6 , wherein the pouch defines a storage volume, and further comprising a zipper that facilitates access to the storage volume.
9. The insulated pouch of claim 6 , further including a frangible sealing surface.
10. A method for making an insulated packaging material as recited in claim 1 , comprising:
providing a sheet of face material formed as a co-extruded film having a first layer and a second layer, wherein said second layer has a lower melting temperature than said first layer;
applying a polymer sealant layer to the first layer of the sheet to produce a sheet with the applied polymer sealant; and
feeding the sheet with the applied polymer sealant and a thermal insulating layer having a thermal resistance in the range of 0.05 to 0.5 CLO (0.0077 to 0.077 m 2 *K/W) into a calender roll nip to cause the sheet and thermal insulating layer to be laminated together wherein the thermal insulating layer is laminated to the second layer of the sheet, to form the packaging material having a thickness in the range of 0.0075 inch (0.0190 cm.) and 0.07 ((0.1778 cm).
11. The method of claim 10 , wherein the polymer sealant layer is selected from the group consisting of polyethylene, polyester, and copolymers thereof.
12. The method of claim 10 , wherein the polymer sealant layer is applied to the face material as a coextruded web structure.
13. The method of claim 10 , further comprising laminating to the thermal insulating layer a second sheet of face material formed as a co-extruded film having a first layer and a second layer, wherein said second layer has a lower melting temperature than said first layer.
14. The method of claim 13 , further comprising applying a printable coating onto the second sheet of face material.
15. The method of claim 10 , further comprising sealing together edges of the insulated packaging material to form a pouch.
16. The method of claim 15 , further comprising installing a fitment in the pouch.
17. The method of claim 15 , further comprising sealing a portion of one edge of the pouch with a sealant having a lower melting point to form a frangible seal.
18. The method of claim 17 , wherein the frangible seal is formed so as to rupture when the temperature inside a volume defined by the pouch exceeds 100° C.
19. The insulated packaging material of claim 1 , wherein the thermal insulating layer comprises fiberfill batt.