Flexible pouch with microcapillary dispensing system
The present disclosure provides a flexible pouch. In an embodiment, the flexible pouch includes opposing flexible films. The flexible films define a common peripheral edge. A microcapillary strip is sealed between the opposing flexible films. A first side of the microcapillary strip is located at a first side of the common peripheral edge and a second side of the microcapillary strip located at a second side of the common peripheral edge. A peripheral seal extends along at least a portion of the common peripheral edge. The peripheral seal comprises a sealed microcapillary segment. The peripheral seal forms a closed flexible pouch having a storage compartment. A liquid is present in the storage compartment.
1. A flexible pouch comprising:
opposing flexible films, the flexible films defining a common peripheral edge;
a microcapillary strip sealed between the opposing flexible films;
a first side of the microcapillary strip located at a first side of the common peripheral edge and a second side of the microcapillary strip located at a second side of the common peripheral edge;
the first side of the common peripheral edge intersecting with the second side of the common peripheral edge to form a corner;
the microcapillary strip having an outer edge, and the outer edge forms an angle with the second side of the common peripheral edge at the corner;
a peripheral seal along at least a portion of the common peripheral edge, the peripheral seal comprising a sealed microcapillary segment, the peripheral seal forming a closed flexible pouch having a storage compartment; and
a liquid in the storage compartment.
2. The flexible pouch of claim 1 wherein the microcapillary strip is composed of a matrix material, the matrix material having a material surface tension (M-surface tension) from 15 dyn/cm to 32 dyn/cm as measured in accordance with ASTM D 2578; and
a liquid in the storage compartment, the liquid having a liquid surface tension (L-surface tension) greater than or equal to 70 dyn/cm as measured in accordance with ASTM D 2578.
3. The flexible pouch of claim 2 wherein the matrix material is selected from the group consisting of ethylene-based polymer and propylene-based polymer; and
the liquid is an aqueous-based solution.
4. The flexible pouch of claim 1 wherein the microcapillary strip is composed of a matrix material, the matrix material having a material surface tension (M-surface tension) from greater than 32 dyn/cm to 50 dyn/cm as measured in accordance with ASTM D 2578;
a liquid in the storage compartment, the liquid having a liquid surface tension (L-surface tension) less than 70 dyn/cm as measured in accordance with ASTM D 2578.
5. The flexible pouch of claim 4 wherein the liquid is a non-aqueous liquid.
6. A flexible pouch comprising:
opposing flexible films, the flexible films defining a common peripheral edge;
a microcapillary strip located at an edge offset distance between the opposing flexible films, the microcapillary strip sealed between the opposing flexible films;
a first side of the microcapillary strip located at a first side of the common peripheral edge and a second side of the microcapillary strip located at a second side of the common peripheral edge; and
a peripheral seal along at least a portion of the common peripheral edge, the peripheral edge comprising a sealed microcapillary segment, the peripheral seal forming a closed flexible pouch having a storage compartment and a pocket;
a liquid in the storage compartment;
wherein the microcapillary strip is composed of a matrix material,
(i) the matrix material has a material surface tension (M-surface tension) from 15 dyn/cm to 32 dyn/cm as measured in accordance with ASTM D 2578, and the liquid has a liquid surface tension (L-surface tension) greater than or equal to 70 dyn/cm as measured in accordance with ASTM D 2578; or
(ii) the matrix material has a material surface tension (M-surface tension) from greater than 32 dyn/cm to 50 dyn/cm as measured in accordance with ASTM D 2578, and the liquid has a liquid surface tension (L-surface tension) less than 70 dyn/cm as measured in accordance with ASTM D 2578.
7. The flexible pouch of claim 6 wherein the matrix material is selected from the group consisting of ethylene-based polymer and propylene-based polymer; and
the liquid is an aqueous-based solution.
8. A flexible pouch comprising:
opposing flexible films, the flexible films defining a common peripheral edge;
a microcapillary strip sealed between the opposing flexible films, the microcapillary strip comprising opposing sides and opposing edges;
a peripheral seal along at least a portion of the common peripheral edge, the peripheral seal comprising
(i) a side seal along each side of the microcapillary strip, and
(ii) an edge seal along an outer edge of the microcapillary strip;
(iii) the side seals and the edge seal abut the microcapillary strip and do not collapse the microcapillary strip; and
the peripheral seal forms a closed flexible pouch having a storage compartment.
9. The flexible pouch of claim 8 wherein a gap is present between a side seal and the respective side of the microcapillary strip, and the side seal comprises a protrusion extending across the gap.
10. The flexible pouch of claim 8 wherein the microcapillary strip is composed of a matrix material, the matrix material having a material surface tension (M-surface tension) from 15 dyn/cm to 32 dyn/cm as measured in accordance with ASTM D 2578;
a liquid in the storage compartment, the liquid having a liquid surface tension (L-surface tension) greater than or equal to 70 dyn/cm as measured in accordance with ASTM D 2578.
11. The flexible pouch of claim 10 wherein the matrix material is selected from the group consisting of ethylene-based polymer and propylene-based polymer; and
the liquid is an aqueous-based solution.
12. The flexible pouch of claim 8 wherein the microcapillary strip is composed of a matrix material, the matrix material having a material surface tension (M-surface tension) from greater than 32 dyn/cm to 50 dyn/cm as measured in accordance with ASTM D 2578;
a liquid in the storage compartment, the liquid having a liquid surface tension (L-surface tension) less than 70 dyn/cm as measured in accordance with ASTM D 2578.