Product Description

Modern textiles have more functions than just looking good these days: Factors like elasticity and water-resistance are properties of equal importance when it comes to comfort of wear. Breathability is another major aspect in functional textiles. Not only the individual substrates of the laminate must provide this quality, the adhesive used also needs to support these characteristics.

The breathability of the compound depends to a large extent on the degree to which the adhesive covers the surface, and this coverage will frequently lead to a reduced steam diffusion. This undesired aspect was successfully reduced by the implementation of innovative, new raw materials.

Improving the breathability of the compound by up to 70 % with unchanged adhesive surface coverage is achieved with the product Jowatherm-Reaktant® PURTex 633.30. The diffusion rate of water vapour through an adhesive film can be easily determined with a simple cup test as outlined in ASTM E96 – 66 Method B.

The illustration in the centre shows the diffusion of water vapour over time through an adhesive film of Jowatherm-Reaktant®PURTex 633.30. covering the cup. Tests conducted with films of conventional textile lamination adhesives showed almost no diffusion of moisture.

Of course, an adhesive should also provide additional important characteristics. The breathable PUR adhesive Jowatherm-Reaktant®PURTex 633.30. guarantees high washing stability, good adhesion to a wide range of membranes and textiles, plus high compound strength. A general requirement in the supply chain of the textile industry is to laminate impregnated textiles to save additional processing steps. The adhesive provides good adhesion to e.g. textiles with a ®RUCO-DRYPLUS pre-treatment from the Rudolf Group. In tests, different PES textiles were pre-treated with this finishing and then laminated with a Sympa-Tex® membrane. The soft touch, which is a major aspect in comfort of wear, was further improved in comparison to the conventional adhesives in use.

 

 

Application Description

Jowatherm-Reaktant® PURTex 633.30 is a breathable PUR hot melt adhesive for textile lamination.

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