Method of chemical treatment on nonwovens
AssigneeTintoria Plana, US Inc.
InventorsSang-hoon Lim, Andrea Plana
Life of this patent
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Abstract
Nonwovens having low-density and resilience have a chemical formulation applied on one surface (e.g., a top surface) by any of various application methods. Then, the chemical formulation is forced to move toward the opposite surface of the nonwoven (e.g., move downward through the nonwoven from top to bottom). The chemical-treated nonwoven is dried to fix the chemical on the nonwovens. Movement through the nonwoven is performed in a controlled fashion so that after drying the distribution of a chemical formulation throughout the nonwoven (e.g., from the top surface to the bottom surface of a nonwoven) is controlled.
Claims10
A chemical treatment method for a nonwoven, comprising:
- applying a chemical formulation to one surface of a nonwoven comprised of a manufactured sheet, web, or batt of natural and/or man-made fibers or filaments that are bonded to each other having low-density ranging from 0.15 g/cm3 to 0.001 g/cm3;
- then
- distributing the chemical formulation through a thickness of the nonwoven by a physical process;
- and then
- drying the chemical formulation distributed within the nonwoven after the distributing step,
- wherein the nonwoven has a resilience of having a thickness loss of not more than 80% after performing the steps of applying, distributing and drying.
A chemical treatment method, comprising:
- applying using a non-contact digital chemical deposition technology a chemical formulation on a first surface of a nonwoven comprised of a manufactured sheet, web, or batt of natural and/or man-made fibers or filaments that are bonded to each other which has a low-density ranging from 0.15 g/cm3 to 0.001 g/cm3, wherein said nonwoven has second surface opposing said first surface and separated by a thickness;
- then
- physically distributing the chemical formulation from the first surface through the thickness toward the second surface by either applying a pressing force on the first surface or applying a suction force on the second surface;
- and then
- drying the chemical formulation on the nonwoven.
Dependencies are inferred from the claim text.