Close-up of water beading on a fabric surface, photographed on site
Once exported outdoor fabrics are placed on the restricted list for perfluorinated compounds, fluorine-based finishing can no longer clear customer testing; after switching to fluorine-free finishing the water-repellency rating keeps falling with repeated washing, and orders stall at the inspection stage, unable to be released.
Chemi Tech has introduced the KMWF-102 series water repellent for export orders bound by perfluorinated-compound limits, with the dosage adjusted flexibly according to the substrate and the finishing concentration. This grade is a water-based fluorine-free formulation whose finishing bath contains no fluorinated components, making it suitable for the water-repellent finishing of fabrics that must be controlled against perfluorinated-compound limits. Based on measured data for water-repellency rating and washing durability, the adapted KMWF-102 dosage can be set.
Advantages of Chemi Tech Water Repellents
Chemi Tech KMWF-102 series water repellent is configured for fluorine-free water-repellent finishing. The formulation is fluorine-free, with no fluorinated components in the finishing bath, so perfluorinated-compound values stay within detection limits; the repellent film forms continuously, laying a uniform water-repellent film over the fibre surface and sealing the capillary channels; washing resistance is outstanding, with repellency still holding above the order-acceptance threshold after repeated washes; the hand stays soft rather than stiff, so fabric flexibility is unaffected after finishing; and the dosage is adjusted flexibly to the substrate, covering both light and heavy fabrics.
Industry Pain Points and Solutions
Fluorine-free water-repellent finishing problems stem mostly from the combined effect of a discontinuous repellent film and insufficient washing resistance, and the consequences are concentrated in two places: a sliding water-repellency rating and a stiffened hand.
A water-repellency rating that keeps sliding with washing leaves finished goods from the same batch failing re-inspection again and again. Once the KMWF-102 concentration is fixed by substrate, the rating after repeated washes still sits stably in the qualified band.
A stiffened hand is the common price of fluorine-free finishing, and the wearing comfort of outdoor fabrics suffers with it. KMWF-102 forms a soft film, so the substrate keeps its original flexibility after finishing and end-user feedback stays stable and controllable.
The cost of water-repellent finishing is tied directly to how stable the rating is. By tying the dosage range to changes in substrate and finishing concentration, repellency and hand are both held in balance.
Typical Operating Conditions and Verification
Customer case: an outdoor fabric finishing company in Fujian, for the water-repellent finishing line of export polyester fabrics.
Export orders had placed perfluorinated items on the control list, so fluorine-based finishing was discontinued. After switching to fluorine-free, the water-repellency rating fell away with washing, and re-inspection deductions were concentrated in the finishing workshop. After comparing water-repellency ratings and hand, Chemi Tech set KMWF-102 as the mill's fluorine-free water-repellent finishing agent, with the dosage fixed by substrate. The water-repellency rating then held stably at the qualified level; after repeated washes the rating remained within the order-acceptance criteria; perfluorinated items sent for testing fell within the limits, and the orders were released.
Frequently Asked Questions
When a fluorine-free water repellent is used on export fabrics, does repellency drop off noticeably after washing?
It all comes down to whether the repellent film forms continuously on the fibre surface, and whether it withstands washing. KMWF-102 has completed water-repellency and washing-durability comparison tests on export fabrics, and within the recommended range the rating stays stable after repeated washes. The actual dosage is set against the substrate and finishing concentration; Chemi Tech fixes the finishing concentration through a parallel comparison of water-repellency rating and hand.