Fabric laundering using a select rinse fluid and wash fluids

Abstract

Methods of laundering fabric with a wash fluid and rinse fluid and methods of recovery of the wash fluid and rinse fluid by selecting rinse wash fluids and rinse fluid with select properties that facilitate removal of the fluids from the fabric and separation of the fluids from each other while providing adequate laundering characteristics.

Description

CROSS-REFERENCE [0001] This application is a Continuation-in-part of application Ser. No. 10 / 699,159, filed Oct. 31, 2003, and related to patent application docket number US20040171, entitled “A Method for Laundering Fabric with a Non-Aqueous Working Fluid Using a Select Rings Fluid”; US20040172, entitled “A Fabric Laundering Apparatus Adapted for Using a Select Rinse Fluid”; and US20040173, “Method and Apparatus Adapted for Recovery and Reuse of Select Rinse Fluid in a Non-Aqueous Wash Apparatus”, filed concurrently herewith.TECHNICAL FIELD OF THE INVENTION [0002] The invention relates to a non-aqueous laundering machine, methods of using the machine, methods of rinsing, drying and recovery as well as apparatuses for the same. BACKGROUND OF THE INVENTION [0003] As defined by Perry's Chemical Engineers' Handbook, 7th edition, liquid extraction is a process for separating components in solution by their distribution between two immiscible phases. Such a process is also referred to as...

AI Technical Summary

Benefits of technology

[0015] It is an object of the invention to describe techniques and methods for minimizing the amount of select rinse

Problems solved by technology

There have been numerous attempts at making a non-aqueous laundering system; however, there have been many limitations associated with such attempts.

Traditional dry-cleaning solvents such as perchloroethylene are not feasible for in-home applications because they suffer from the disadvantage of having perceived environmental and health risks.

These solvents are environmentally friendly and have high vapor pressures leading to fast drying times, but these solvents don't currently provide the cleaning needed in such a system.

However, since these solvents are combustible and usually have low vapor pressures, it would be difficult to dry with traditional convection heating systems.

The solvents have low vapor pressures making evaporation slow thus increasing the drying time needed for such systems.

These safety codes limit the potential heat such solvents could see or the infrastructure needed to operate the machine.

In traditional washer / dryer combination machines, the capacity or load size is limited based on the drying rate.

However, the long-term stability of these mixtures is unknown but has the potential of separating due to dissociating the separate components.

These conditions would result in larger machines than need be for such an operation.

Additionally, this is an immersion process that may require more than one rinse so additional storage capacity is needed.

While a high vapor pressure solvent may be preferred in such a system, US20030084588 fails to disclose potential methods of applying the fluid, when the fluid should be used and methods minimizing the amount of fluid needed.

Finally, this patent fails to identify potential recovery strategies for the high vapor pressure co-solvent.

Moreover, cleaning of electrical substrates is performed in high technology manufacturing facilities employing a multi-stage that is not readily adaptable to such a cleaning application.

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