Solvent Extraction
A solvent-based cleaning method removes oils and waxes from raw synthetic fabrics using a chlorinated hydrocarbon. Performing a trichloroethylene scour is highly effective for dissolving heavy silicone lubricating oils applied during yarn spinning. It is conducted in a closed-loop continuous washing machine.
Wax Removal
The fabric passes through a hot solvent bath where the chemical quickly penetrates the fiber bundles. Unlike water, the solvent dissolves hydrophobic knitting oils without causing swelling in water-sensitive fibers. This wash produces a fabric that is completely clean and ready for uniform dyeing.
Dry Can
Dry cans heat the fabric immediately after the solvent bath to vaporize any remaining liquid. This desolventizing process is done under a vacuum to ensure that all of the solvent is captured and condensed. The recovered solvent is distilled and returned to the wash tanks.
Environmental Safety
Strict environmental regulations govern the use of this chemical due to its toxicity and risk to human health. Modern mills use hermetically sealed systems that prevent the release of any vapors into the air. Inspectors measure the residual solvent on the fabric to verify that it is safe for handling, which ensures compliance with worker safety rules and prevents any chemical emissions from escaping into the surrounding community.
