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Covestro's Insqin technology for outdoor textiles

21
Mar '19
Pic: Covestro
Pic: Covestro
Covestro will present a new solution for breathable yet waterproof outdoor textiles based on its Insqin technology at the European Coatings Show 2019 and Techtextil 2019. The coatings are purely water-based. Outdoor clothing is designed to keep joggers and hikers dry when it’s raining, but also to allow water vapour from sweat to escape to the outside air.

More and more buyers are also looking for outdoor textiles that are sustainable. All three of these requirements are met by Insqin technology, which stands for water-based textile coatings that don’t use any solvents. At the European Coatings Show 2019 from March 19 to 21, Covestro will present outdoor clothing that owes its functional properties to this coating technology at its “City of Sustainnovation”.

Two layers are responsible for giving the outdoor clothing on display its soft, comfortable feel: an adhesive coating, which is based on the polyurethane (PU) dispersion Impraperm DL 5310, and a surface coating, which is based on the PU dispersion Impraperm DL 5249. Covestro has been offering its customers both products for a few months.

One square metre of fabric coated with the Insqin system allows more than five kilograms of water vapour to escape per day. Both layers contribute to the excellent breathability. On the other hand, layered garments can withstand a water column of more than eight metres during testing. The water column is a measurement of how water-resistant a functional textile fabric is: when the measurement is carried out in accordance with DIN EN ISO 811, the outer side of the textile fabric is exposed to liquid. The water pressure is then steadily increased – until the third drop is seen on the inner side. The effective pressure at this point is then specified in millimeters of water column.

“It is quite easy to customise the breathability and water resistance of the coating to the intended purpose and function of the textile fabric,” says Thomas Michaelis of Covestro. The head of Textile Coatings for the Europe, Middle East, Africa and Latin America (EMEA/LA) region adds: “Tailor-made properties can be achieved by varying the formulation and coating thicknesses.” Due to the many configuration possibilities of the Insqin system, its use is not limited to just garments. Owners of backpacks, shoes and gloves also benefit from it.

Water-based coatings with Impraperm DL 5310 and Impraperm DL 5249 provide garments with good, uniform breathability over the entire surface. This is a clear advantage over other technologies for outdoor clothing, in which membrane films are spot-bonded with the textile fabric. Adhesives are usually not breathable, which means that no water vapour can escape at the adhesive points. However, water-based Impraperm dispersions not only offer an alternative to this membrane technology, but can also be used to improve them: when used as an adhesive, they guarantee permeability for water vapour at the adhesive points. (SV)

Fibre2Fashion News Desk – India


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