Coforming processes and forming boxes used therein
Coforming processes for commingling two or more separate materials, for example solid additives, for example fibers and/or particulates, and filaments, and equipment; namely, forming boxes, useful in such coforming processes and more particularly to coforming processes for commingling filaments with one or more fibers, such as pulp fibers, and forming boxes useful therein are provided.
1. A coform box defined by a housing comprising one or more filament inlets and one or more additive inlets wherein at least one of the one or more additive inlets is connected to at least one of the one or more filament inlets, wherein the at least one of the one or more filament inlets is connected to one or more meltblow dies and wherein at least one of the one or more meltblow dies is connected to the housing that defines the coform box, wherein the housing that defines the coform box exhibits a downwardly flaring section from the one or more additive inlets to an exit of the coform box.
2. The coform box according to claim 1 wherein at least one of the one or more meltblow dies is a multi-row capillary meltblow die.
3. The coform box according to claim 1 wherein the coform box is geometrically symmetric with respect to the coform box's cross machine-direction axis.
4. The coform box according to claim 1 wherein the coform box exhibits symmetric momentum with respect to the coform box's cross machine-direction axis.
5. The coform box according to claim 1 wherein the coform box exhibits symmetric horizontal momentum with respect to the coform box's cross machine-direction axis.
6. The coform box according to claim 1 wherein the at least one of the one or more filament inlets is at an angle of less than 85° to the at least one of the one or more additive inlets.
7. The coform box according to claim 1 wherein the at least one of the one or more filament inlets is positioned between the at least one of the one or more additive inlets and at least one other of the one or more additive inlets.
8. The coform box according to claim 1 wherein the coform box exhibits a JAR of greater than 0.5 during operation.
9. The coform box according to claim 1 wherein the coform box exhibits a JAR of less than 15 during operation.
10. The coform box according to claim 1 wherein the one or more additive inlets are in fluid communication with an additive source.
11. The coform box according to claim 1 wherein at least two of the one or more additive inlets are independently controllable during operation.
12. The coform box according to claim 11 wherein the at least two of the one or more additive inlets are independently controllable with respect to concentration, type of additive, composition, aspect ratio of additive, and mixtures thereof.
13. The coform box according to claim 1 wherein at least two of the one or more filament inlets are independently controllable during operation.
14. The coform box according to claim 13 wherein the at least two of the one or more filament inlets are independently controllable with respect to concentration, type of polymer, composition, aspect ratio of additive, and mixtures thereof.
15. The coform box according to claim 1 wherein at least one of the one or more filament inlets or at least one of the one or more additive inlets is independently controllable.