Flexible containers having flexible valves
Non-durable self-supporting flexible containers having product volumes and structural support volumes are provided with a valve mechanism to facilitate dispensing fluid product from the product support volume. One or more tension-inducing elements may be used to provide the valves with the ability to permit dispensing of fluid product from the product volume upon application of greater than a minimum threshold but less than a maximum threshold of squeeze force to an exterior of the flexible container. The valve may also be re-closable to prevent fluid product from being dispensed subsequent to use. The flexible container may further be provided with a product sensory experience sampling mechanism to provide for consumer interaction with one or more characteristics of the fluid product contained in the product volume without compromising the integrity of the product volume.
1. A disposable, stand-up flexible container comprising:
at least one product volume; and
a structural support frame that includes a plurality of structural support members, each of which includes an expanded structural support volume that is filled with an expansion material at a pressure above atmospheric pressure, wherein the structural support frame supports the flexible container such that the container stands upright;
at least one flexible valve wherein:
the flexible valve includes a flow path for dispensing the fluent product from the product volume and the flow path includes at least one tension-inducing element, which is an expandable volume that is expanded by an expansion material;
the flexible valve automatically opens to dispense the fluent product through the flow path when a pressure equal to or greater than the critical pressure buildup exists inside the product volume;
the flexible valve automatically closes when a pressure less than the critical pressure buildup exists inside the product volume; and
the flexible valve has a suck-back effect on the fluent product, wherein the suck-back effect is caused by a tension gradient:
in the flow path,
from the tension-inducing elements,
when a pressure inside the product volume falls below the critical pressure.
2. The disposable, stand-up flexible container of claim 1 , wherein the critical pressure buildup is between about 0 Pa and about 90,000 Pa gauge pressure.
3. The disposable, stand-up flexible container of claim 1 , wherein the flexible valve
opens and closes due to manipulation that deforms the product volume of the container.
4. The disposable, stand-up flexible container of claim 1 , wherein the flow path includes at least two tension-inducing elements, which are opposed from one another.
5. The disposable, stand-up flexible container of claim 4 , wherein each of the tension-inducing elements is an expandable volume that is expanded by an expansion material.
6. The disposable, stand-up flexible container of claim 5 , wherein the flow path dispenses the fluent product from the product volume and between the tension-inducing elements.
7. The disposable, stand-up flexible container of claim 1 , wherein the at least one tension-inducing element is in fluid communication with at least one of the expanded structural support volumes.
8. The disposable, stand-up flexible container of claim 1 , wherein:
the flow path includes an inlet and an outlet;
the tension gradient includes a region of relatively lower tension proximate to the inlet and a region of relatively higher tension proximate to the outlet.
9. The disposable, stand-up flexible container of claim 1 , wherein the critical pressure buildup is between about 10,000 Pa and about 60,000 Pa gauge pressure.
10. The disposable, stand-up flexible container of claim 1 , wherein the critical pressure buildup is between about 25,500 Pa and about 90,000 Pa gauge pressure.
11. The disposable, stand-up flexible container of claim 1 , wherein the fluent product can be dispensed single-handedly.
12. The disposable, stand-up flexible container of claim 1 , wherein the entire container is made from one or more flexible materials.