Dr. Naresh M. Saraf (Supertex-Sarex, Mumbai, India)
Finishes that repel water, oil, and dirt are important in all parts of the textiles market for clothing, home and technical textiles. Water repellency is achieved by using different product groups, but oil repellency is attained only by application of fluorocarbon polymers. The later are modified to have a wide range of properties to fulfill the different demands of the consumers and the intended purpose. The oldest repellent finish is to repel water. Fluorochemical repellents are unique because they confer both oil- and water- repellency to fabrics. The ability of fluorochemicals to repel oil is related to their low surface energy that depends on the structure of the fluorocarbon segment, the non- fluorinated segment of the molecule, the orientation of the fluorocarbon tail, and the distribution and amount of fluorocarbon moiety on fibres. Fluoropolymers suited for textile finishing generally consist of a polymeric backbone of acrylate or polyurethane, with fluorinated side chains. Their effectiveness for each application varies with the chain length, the shape of the chain and the type of end groups. A perfluroinated compound that has frequently been part of product formulations for hydrophobisation of textiles is perfluorooctanoic acid (PFOA), which is a chemically-stable surfactant. Continue reading Careguard-66 (New) : An Eco-friendly Water & Oil Repellent→
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Rana Plaza two years on: progress but no hiding from massive task ahead
23 Apr 2015
On 24 April it will be two years since the Rana Plaza collapsed, killing more than 1,100 workers and injuring thousands more. The labour movement and its NGO partners are calling on the garment industry to show that it has the leadership to staying the course and changing the global supply chain permanently.