Gelsenkirchen, Germany-Norres Schlauchtechnik GmbH & Co. KG has developed an innova-tive process to manufacture premium polyurethane Pre-PUR hose systems with increased heat and ageing resistance. The new HT-PUR 351 and HT-PUR 355 products, used to transport, for ex-ample, hot gases, powders or granulates are superior to materials used before.
HT-PUR - is a high temperature polyurethane, an advanced type of the premium polyurethane Pre-PUR®. The innovative production process cross links the polyurethane in a simple and efficient way. The innovative HT-PUR is a hose material, manufactured and sold as AIRDUC profile hoses, which is heat resistant over a long time and clearly much superior at resisting ageing under heat compared to materials like standard polyurethanes, neoprene or thermoplastic elastomers. Dur-ing heat exposure the new material shows a 40 percent improvement in mechanical stability.
Used in transporting hot granulates, HT-PUR demonstrates a significantly longer service life and there is almost no abrasion residue found in the transported medium. The pressure resistance of the new material, at higher temperatures, was found to be more than twice that of hoses made of premium polyurethane and the HT-PUR has an increased chemical stability.
HT-PUR hoses are available in diameters from 20 to 500 mm and length is no longer dependant on special tools. This offers great savings potential to all users because of less off cuts and the re-duction of stocks. Compared to rubber- and plastic hoses, AIRDUC® profile hoses have further advantages. Because of the spring steel wire firmly embedded in their wall, they are capable of electrostatic discharge according to BGR 132, so that electrostatic charging and resulting proc-ess disruptions are avoided. The HT-PUR hoses weigh less, have a very smooth interior surface and high axial strength combined with good flexibility. The profile is flow optimised resulting in reduc-tion of blower power requirements. The high smoothness of the interior hose surface leads to less deposition of the delivered material and allows gentler material transport.
The hose, made from this innovative material, has significant advantages: It works in the same way as the hoses used up to now, but it is lighter, more flexible and less expensive.