New and objective measuring technique to analyse softness

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At the Edana Nonwoven Symposium INS 2015, a German developer and producer of paper testing technology presented a new method for process optimisation, quality assurance and R&D in nonwoven production and converting.

Publication in "avr - Allgemeiner Vliesstoff-Report" Issue 05-2015 on pages 99-101

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The company´s so-called TSA (Tissue Softness Analyser) is a well proven device for the tissue industry and might now conquer the nonwoven business as well. TSA was introduced and invented by Dipl.-Phys. Giselher Gruener in 2006 as a completely new measuring method which simulates human touch to a great extent during testing of a sample by hand.

Successful symposium reflects healthy industry

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Delegates from across the global nonwovens and related industries declared the 2015 edition of the International Nonwovens Symposium - held in early June by Edana in Prague, Czech Republic - "a great success".

Publication in "avr - Allgemeiner Vliesstoff-Report" Issue 04-2015 on pages 76-78

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Improved measurement results

"Research and testing for nonwovens" was one of the focus topics of the second day of the symposium. Within this scope, Alexander Grüner, Global Marketing and Business Development Manager at German testing equipment supplier emtec Electronic, explained a new method for process optimisation, quality assurance and R&D. Indeed, the objective technical device he presented could be a means to solve the problem of hand-feel tests: due to the different sensitivity of hand nerves, a lot of variations are observed, leading to biased results. According to Grüner, the TSA (Tissue Softness Analyser) which was originally developed for the tissue industry gives reliable and objective information about the real softness, smoothness/roughness, stiffness as well as the final hand feeling. The measurement is done in two steps - a sound analysis and a bode moving over the sample creating a vibration according to the surface topography - and the availability of these parameters opened a huge amount of chances for the optimisation of the production and converting processes, he said.

Predicting the behaviour of paper and board surfaces

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during gluing, printing and coating processes

Publication in "Coating International" - Issue 06-2015 on pages 23-28

1. Basics about specifications of paper and board

Paper and board is generally further converted, i.e. glued, printed or coated, in order to assure the required final quality of the finished product. For an optimal runability during finishing or converting processes, certain specifications between producer and customer are agreed upon. Usually, these specifications are based on standard measurement methods like Cobb test, Hercules Sizing Test HST, Bendtsen/Gurley porosimeter, and Smoothness Beck. Although the agreed specifications of the product paper and board are often met, frequently still converting problems occur and the reason is unclear.

2. Problems in converting processes and reasons for them

It is therefore necessary to identify and subsequently to measure the paper parameters that are relevant for the converting process. Thereby, it is very helpful to understand the converting process of paper and board in detail. Main problems are the gluability, printability and coatability of paper and board.

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