Water Repellent Finishing of Nylon 66 for Umbrella

Fluorocarbon-based compound was used in this experiment to obtain water-repellent finish on nylon (Nylon 66) fabric intended for use as material for umbrella. This compound polymerizes when cured under suitable condition to form a film of low surface energy which subsequently lowers the critical surface tension of solid and hence renders it water-repellent and oil-repellent. The material was treated with finishing liquor containing: 10, 20, and 40 g/l, and then was subjected to various tests to evaluate the result. It was found that the best result was obtained by the use of fluorocarbon as much as 40 g/l. (Yanti W, Yayu R, Yullia P)

Water Repellent Polyester/Cotton Jacket

Water-repellent finishing is a chemical process by which a certain kind of textile material is made resistant to water penetration but at the same time still allows transportation of air. Fabric made of polyester-cotton is in general considered more comfortable than that of polyester alone. In this study, fluorocarbon-based chemical (Aversin KFC-I) was used to generate water-repellent properties on polyester-cotton fabric. This particular chemical has good properties as water-repellent finish: can be used for polyester-cotton fabric, good water-repellent properties, and does not change the color of the treated fabric. The addition of additives such as softener to the finishing liquor often produce an adverse effect to water-repellency, so experiment was also performed to investigate the effect of silicon type softener (Silicone N-100) to water-repellency. The data shows that the best result was obtained by the use of 90 g/l Aversin KFC-I without the addition of softener. Silicone N-100 only slightly improves the handle but it decreases the water-repellency of the treated fabric, which is obviously observed at higher concentration of Aversin KFC-I (90 g/l). (Esti Yuliani, Fernando S, Fina Dwi N, Ica Yuniarti)

Water Repellent Polyester for Umbrella

In this work, we studied the application of perfluoro alkyl acrylic copolymer (Aversin KFC-I), a water-repellent agent, on 100% polyester fabric. The purpose of the study is to find an optimum recipe of water-repellent finishing that gives the fabric qualities required by an umbrella. The material for an umbrella is normally made of nylon or cotton. The latter is in general more expensive than the former. In addition to cost factor, cotton is normally much heavier than nylon, especially when gets wet. Polyester may offer some advantages over nylon both technically and economically. Technically, it has a lower moisture regain, which means that it retains less water than nylon does. It was found from the experiments that the best result was obtained by the use of 50 g/l Aversin KFC-I. Spray test showed a value of 100, which means wetting does not take place on the surface of 100% polyester fabric of concerned. (Ami Sebastian, Ari Rahmasari, Dini Nursari, Dreta Wulandari)

Quality Improvement for Mail Bag by Water Repellent Finishing Using Fluoro Chemical and Melamine Resin

Mail bag requires certain qualities to serve its purpose, one of which most important is that it must provide sufficient protection for postal material contained in it. Water-proof, in this case, is extremely important especially in region like Indonesia. Such a property is normally provided by treating mail bag, which is usually made of canvas, with wax emulsion. This type of coating is not permanent, in the sense that it may be removed either by rubbing and/or other severe condition during its use. Chemical treatment with fluorocarbon and melamine resin was proposed to improve its water-proof effect. The experiment shows that fluorocarbon and melamine resin can work together in improving the quality of mail bag. (Aris Hudayana, Aryaji, Berlian Zain, Eka Diasy)