Supercritical fluid material scouring
a fluid material and supercritical technology, applied in the direction of textile dry cleaning apparatus, liquid/gas/vapor treatment of definite length materials, dyeing process, etc., can solve the problems of unneeded chemicals entering the wastewater stream, material may be stored indefinitely, and all steps consume time and resources, so as to achieve efficient scouring and efficient cleaning of target materials
Pending Publication Date: 2020-02-20
NIKE INC
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AI Technical Summary
Benefits of technology
This method enables a more efficient and environmentally friendly scouring and dyeing process, reducing water usage and processing time, while maintaining or improving the quality of the material finishes, such as water resistance and coloration.
Problems solved by technology
Traditional scouring of materials relies on a large quantity of water, which can be detrimental to the fresh water supply and also result in undesired chemicals entering into the wastewater stream.
These steps all consume time and resources.
Further, the material may be stored for indefinite lengths of time before a subsequent finishing operation occurs to the material.
During this waiting time, foreign materials may be deposited on the material nullifying some of the previously-performed scouring.
Method used
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Embodiment Construction
[0026]Methods are directed to scouring a target material in a supercritical fluid (“SCF”) carbon dioxide (“CO2”) environment. Variables of the process are manipulated in different sequences to achieve an efficient scouring of the target material. The variables include, time, pressure, heat, internal flow rate within a pressure vessel, and exchange / filtering of the working substance (e.g., CO2).
[0027]Aspects include method of scouring a target material. The method includes positioning a target material in a pressure vessel and introducing carbon dioxide within the pressure vessel. The method further includes increasing an internal temperature of the pressure vessel to an operating temperature and increasing an internal CO2 flow rate to a non-zero rate. The method also includes increasing a pressure within the pressure vessel to an operating pressure such that the CO2 is at a SCF state when at the operating temperature and the operating pressure. Using SCF CO2, the scoured elements ar...
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Supercritical fluid (“SCF”) is used to scour a target material to leave scour elements, such as oligomers and oils from the target material. Carbon dioxide (“CO2”) is introduced into a pressure vessel also containing the target material to be scoured. The CO2 is raised in temperature and pressure to a SCF state. The CO2 is recirculated within the pressure vessel to scour the target material. An exchange of the CO2 is occurs allowing for the scoured elements to be removed from the CO2 and therefore from within the pressure vessel. Operation variables such as temperature, pressure, time, internal flow rate, and CO2 exchange are adjusted to achieve a scouring of the target material.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. Nonprovisional application Ser. No. 15 / 048,655, entitled Supercritical Fluid Material Scouring, filed Feb. 19, 2016 (the “655 Application”). The '655 application claims the benefit of U.S. Provisional Applications: (1) U.S. Provisional Patent Application 62 / 119,015, entitled Dyeing of Spooled Material with a Supercritical Fluid, filed on Feb. 20, 2015; (2) U.S. Provisional Patent Application 62 / 119,010 entitled Equilibrium Dyeing of Rolled Material with a Supercritical Fluid, filed on Feb. 20, 2015; (3) U.S. Provisional Patent Application 62 / 135,680, entitled Supercritical Fluid Treatment Process Variable Manipulation, filed on Mar. 19, 2015; and (4) U.S. Provisional Patent Application 62 / 296,983, entitled Supercritical Fluid Material Scouring, filed on Feb. 18, 2016. The entireties of the aforementioned applications are incorporated by reference herein.TECHNICAL FIELD[0002]Scouring and cleaning ...
Claims
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IPC IPC(8): D06M11/76D06P5/20D06L1/00D06B19/00
CPCD06P5/2055D06M11/76D06L1/00D06B19/00D06B23/042D06B5/16D06B5/22
InventorKELLY, MATT W.MONTERO, GERARDO A.KANCHAGAR, ANAND P.PANCHMATIA, PANKAJ RUGNATH
OwnerNIKE INC