The Effect of Tension on the Properties of Resin-Treated Cotton Fabrics

Abstract

The influence of tension on the properties of mercerized and unmercerized resintreated fabrics has been investigated. The fabrics were tensioned in the filling direction by stretching in a tenter frame during drying after bleaching and again during the resin treatment. It was found that the losses in breaking and tearing strengths which accompany the resin treatment of cotton fabrics were reduced by drying under tension. The magnitude of the strength improvement, which occurred only in the stretched direction, depended on the final width of the treated fabric. Although the strength increases were accompanied by losses in elongation, the energy to rupture decreased in one case and in another remained unchanged. The abrasion resistance of the treated fabrics, however, always increased with stretch. No loss in strength occurred perpendicular to the stretched direction other than that caused by the reduction in ends per inch. The wet and dry wrinkle recovery and the wash-wear index of the treated fabrics were not affected by stretching.The strength improvements realized by stretching apply to both mercerized and unmercerized fabrics. Mercerized fabrics, however, showed higher strengths and a lower wash-wear index for a given level of resin treatment than did unmercerized materials, whether or not tensioning was employed during treatment. For practical purposes, the benefits of tensioning treatments can be realized only with a permanent resin finish. These studies were conducted with a diepoxide-triazone resin blend.

Studies in Cross-Linking Reactions of Cellulose

“…\Vith a view to overcoming the tear and abrasion losses, additives such as butadiene, acrylonitrile latices [29], silicone and polyethylene emulsions [30], and other softening agents have been studied. Attempts have been made to get better results by improving the condition of the cellulose during the reaction either by stretching [9] or by keeping it in a swollen state [4,31].…”

The Effects of Various Combinations of Chemical and Physical Treatments on the Physical Properties of Cotton Yarns and Bundles

“…The yarns available were a Pima three-ply yarn (120 tex), a Bohshaw and a Deltapine, both two-ply yarns (74 tex). The ply twist inserted was that needed to produce 4 balanced twist in the yarns as delivered from the twister frame. The fibers for the bundles were obtained by defibering the treated yarns.…”

“…In these investigations, mercerization prior to resination was found to materially reduce the losses in tensile and tearing strength, normally associated with resin cross-linking [2,4,12]. It has also been demonstrated [4,12 J that tension during mercerization prior to resin treatment decreases strength losses even more.…”

“…In these investigations, mercerization prior to resination was found to materially reduce the losses in tensile and tearing strength, normally associated with resin cross-linking [2,4,12]. It has also been demonstrated [4,12 J that tension during mercerization prior to resin treatment decreases strength losses even more. Furthermore, there is evidence that tension during the curing process of cotton fibers and yarns, which had or had not received 'prior chemical treatment, increases tensile strength and some other associated properties to values higher than if no tension was applied during the curing [5, 7, , 9, 11].…”