Slit nozzle application with bitumen onto a carrier material.
State-of-the-art hotmelt coating systems for bitumen processing
Increased efficiency in bitumen application through wide slit nozzle technology
Thermal challenges and an optimal coating application are required not only in hot glue processing. SM Klebetechnik has transferred the benefits of the hotmelt coating to the processing of bitumen compounds. Result: higher product variation and diversity, as well as increased efficiency and cost savings for the customer.
Hotmelt is the general term for thermoplastic and reactive hotmelt products, whose application in the assembly, automotive, packaging or non-woven industries is continuously increasing
Bitumen processing through optimised hotmelt technology
Modern technology enables the use of modular application systems of scalable size and performance, which can also process alternative materials with related process parameters. Nevertheless, individual requirements must be considered when altering production – sometimes a tricky issue that the experts for application and coating systems from SM Klebetechnik are specialised in.
“In our technical centre, we closely examine the rheological requirements of the materials being processed and develop approaches to optimise processing,” explains Rene Schog, Managing Director of SM Klebetechnik. The modern hotmelt machine technology for bitumen processing for the production of welding sheets for roof sealing was scaled and optimised.
Conventional production of welding membrane products for roof sealing
Knife coating systems are generally used to produce bitumen or polymer-bitumen welding sheets, often simply called “roofing felt”. For the bitumen welding tracks, the carrier sheet is coated on both sides with liquefied bitumen mass in one action. The carrier material is embedded in the middle. This leads to undesirable effects such as discrepancies in the layer thickness or edge sharpness and edge inaccuracies. Thermal effects can also influence the viscosity of the bitumen formulation and the desired product properties.