Revistes Catalanes amb Accés Obert (RACO)

Influencia de los suavizantes de organopolisiloxano en la mejora de las propiedades físicas de tejido de algodón aprestado y en la redeposición de impurezas en el lavado

Francisco Javier Carrión Fité

Resum


Resins are usually applied to improve both the finish and crease recovery of cotton articles. The resins produce a substantial loss of both softness and mechanical properties. These disadvantages require the use of fabric softeners to add
properties desired by the user. The latest softeners, based on aminopolysyloxane and ammoniopolysyloxane compounds, have shown themselves to be very interesting in achieving a soft, smooth feel of the cotton fabric, together with an improvement in washing (fastness) and use, as well as providing the fabric with other properties. Their application as a microemulsion shows a better behaviour than their use as a conventional emulsion. In this study softeners in the form of a microemulsion of organopolysyloxane of the type aminopolysyloxane and ammoniopolysyloxane microemulsion were applied to cotton treated with
DMDHEU. In order to see the improvement in the physical properties of these softeners on the fabric, the following features were examined; texture, the capillary effect of the fabric, abrasion, fabric-fabric friction and pilling. All of these factors were measured according to the different chemical structures and molecular weights of the softeners used. The behaviour of the settling of impurities during the washing process was studied taking into account different surface states produced by the softeners. The washing process was carried out in the presence of an anionic surfactant, sodium dodecylbenzosulphate and a non-ionic surfactant, 6 m O.E. fatty alcohol. Both were applied either separately or in mixture, without the presence of adjuvants.

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