Herrmann Ultraschall at the Index 2020
Ultrasonic technology for the nonwovens industry
Herrmann Ultraschalltechnik GmbH & Co. KG, Karlsbad/Germany, has configured a portfolio to determine and evaluate typical ATB materials – making use of extensive laboratory equipment such as a scanning electron microscope and a differential scanning calorimetry. This service can help manufacturers to foresee bonding challenges and material wastage.
Bi-component (bico) fibers are an important part of ATB. So-called core-sheath bico, where one polymer is mantled by a second polymer, is a frequently processed bonding fibers for ATB nonwovens. A bi-component fiber is used to exploit capabilities not existing in either polymer alone: PE increases softness, PET gives strength but has the disadvantage of the high melting point. PLA might be used when fibers from natural sources are being asked for, to name just a few. The melting point of the sheath material is lower than that of the core material, with the result that the core fibers adhere at the crossing points. The sheath ratio of the fiber can vary depending on the manufacturer and the differential scanning calorimetry helps to determine these exact material ratios.
The evaluation of the surface and cross-section of the different laminated materials with the help of a scanning electron microscope allow a study of the fiber quality and an assessment of the weld quality. ATB material can vary greatly – the fiber composition has a strong influence on the material behavior and needs to be evaluated ideally prior to bonding. Weld performance can now also be tested beforehand.
The Index 20 has been postponed to October 20-23, 2020.
Herrmann Ultraschall at the Index 2020: Stand 1541