Flexible packaging structure with a built-in opening and reclose feature
A flexible packaging laminate is formed to have a built-in opening and reclose feature by forming the laminate as a two-part structure having an outer structure joined in face-to-face relation with an inner structure. Score lines are formed in both structures to enable an opening to be formed through the laminate by lifting an opening portion (e.g., a flap or the like) of the two structures out of the plane of the laminate. The score line through the outer structure defines a larger opening than the score line through the inner structure, such that a marginal region of the outer structure extends beyond the edge of the opening portion of the inner structure. A pressure-sensitive adhesive is used to re-adhere the marginal region to an underlying surface of the inner structure adjacent the opening through the laminate.
1. A resealable packaging structure for housing products wherein the entire packaging structure comprises a laminate comprising an outer layer and an inner layer that are coextensive across substantially their entire areas, each of the layers having an upper surface and a lower surface and wherein, other than in an unadhered tab portion of the outer layer, the outer layer lower surface is adhered to the inner layer upper surface over substantially their entire surfaces, the laminate further comprising a repeatedly openable and closeable flexible structure which comprises:
an outer score line formed in the outer layer of the laminate defining an outer layer opening portion that is separable from the outer layer along the outer score line;
an inner score line formed in the inner layer of the laminate defining an inner layer opening portion that is separable from the inner layer along the inner score line, wherein the outer layer opening portion is larger in area than the inner layer opening portion wherein the outer layer opening portion extends beyond a periphery of the inner layer opening portion, and wherein the outer layer opening portion comprises the tab portion;
the inner layer upper surface comprising a first marginal region surrounding the inner score line in the laminate;
a flap comprising the outer layer opening portion and the inner layer opening portion, wherein the inner layer opening portion of the flap is defined by the inner score line and wherein the outer layer opening portion of the flap is defined by the outer score line;
the outer layer lower surface comprising a second marginal region comprising at least a portion of a periphery of the outer layer opening portion lower surface;
an ink layer disposed on the lower surface of the outer layer; and
the first marginal region being releasably and resealably adhered to the second marginal region so that the flap may be repeatedly opened and resealed, wherein an initial release of the first and second marginal region disrupts the ink layer thereby preventing the reseal of the first marginal region and the second marginal region in registration along the outer score line.
2. The resealable packaging structure of claim 1 , wherein the outer layer lower surface and the inner layer upper surface are adhered over their entire surfaces, other than the tab portion, via a pressure-sensitive adhesive.
3. The resealable packaging structure of claim 1 , wherein the outer layer lower surface and the inner layer upper surface are adhered over substantially their entire surfaces via a pressure-sensitive adhesive.
4. The resealable packaging structure of claim 1 , wherein the tab portion extends beyond the first marginal region and the second marginal region.
5. The resealable packaging structure of claim 1 , wherein the inner layer is a coextruded web comprising a barrier layer and a sealant layer.
6. The resealable packaging structure of claim 1 , wherein the inner layer comprises a barrier layer and a sealant layer adhesively laminated together.
7. The resealable packaging structure of claim 1 , wherein the inner score line penetrates a portion of the inner layer.
8. The resealable packaging structure of claim 1 , wherein the outer score line penetrates a portion of the outer layer.
9. The resealable packaging structure of claim 1 , wherein the first marginal region and the second marginal region are in the form of a partial racetrack design.
10. The resealable packaging structure of claim 1 , wherein the resealable packaging structure is a stand-up pouch.
11. A resealable packaging structure for housing products wherein the entire packaging structure comprises a laminate comprising an outer layer and an inner layer that are coextensive across substantially their entire areas, each of the layers having an upper surface and a lower surface and wherein, other than in an unadhered tab portion of the outer layer, the outer layer lower surface is adhered to the inner layer upper surface over substantially their entire surfaces, the laminate further comprising a repeatedly openable and closeable flexible structure which comprises:
an outer score line formed in the outer layer of the laminate defining an outer layer opening portion that is separable from the outer layer along the outer score line;
an inner score line formed in the inner layer of the laminate defining an inner layer opening portion that is separable from the inner layer along the inner score line, wherein the outer layer opening portion is larger in area than the inner layer opening portion wherein the outer layer opening portion extends beyond a periphery of the inner layer opening portion, and wherein the outer layer opening portion comprises the tab portion;
the inner layer upper surface comprising a first marginal region surrounding the inner score line in the laminate;
a flap comprising the outer layer opening portion and the inner layer opening portion, wherein the inner layer opening portion of the flap is defined by the inner score line and wherein the outer layer opening portion of the flap is defined by the outer score line;
a tamper-evidence feature disposed about the outer layer opening portion, wherein initial opening of the flap causes the tamper-evidence feature to be visible along the outer layer opening portion in the laminate;
the outer layer lower surface comprising a second marginal region comprising at least a portion of a periphery of the outer layer opening portion lower surface; and
the first marginal region being releasably and resealably adhered to the second marginal region so that the flap may be repeatedly opened and resealed.
12. The resealable packaging structure of claim 11 , further comprising an ink layer printed on the lower surface of the outer layer.
13. The resealable packaging structure of claim 12 , further comprising a coating disposed between the lower surface of the outer layer and the ink layer, wherein the coating is configured to reduce adherence of the ink layer.
14. The resealable packaging structure of claim 13 , wherein the coating is patterned applied about the second marginal region.
15. The resealable packaging structure of claim 11 , wherein the outer layer lower surface and the inner layer upper surface are adhered over their entire surfaces, other than the tab portion, via a pressure-sensitive adhesive.
16. The resealable packaging structure of claim 11 , wherein the outer layer lower surface and the inner layer upper surface are adhered over substantially their entire surfaces via a pressure-sensitive adhesive.
17. The resealable packaging structure of claim 11 , wherein the tab portion extends beyond the first marginal region and the second marginal region.
18. The resealable packaging structure of claim 11 , wherein the inner layer is a coextruded web comprising a barrier layer and a sealant layer.
19. The resealable packaging structure of claim 11 , wherein the inner layer comprises a barrier layer and a sealant layer adhesively laminated together.