When crosslinked polyester-cotton blend fabrics came into general use about fifteen years ago, problems of soil retention that are inherent with these fabrics were soon recognized. Many studies were conducted to identify the factors responsible for soiling and soil retention in blends, and to develop finishes capable of improving soil release.
Several finishes for the improvement of the soil-release properties of blend fabrics have been developed and introduced commercially. These finishes are typically based on one of three polymer types: nonionic poly(ester-ethers); anionic copolymers of acrylic acid; or "dual-action" fluoropolymers. Two particular finishes, developed in our laboratory, that are based on combinations of Huoropolymers with hydrophilic reagents, such as polyether derivatives and acrylic acid polymers, are discussed in detail.
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