From the Sector

The textile service provider Hohenstein has successfully extended its accreditations as a testing laboratory and certification body to include FFP (Filtering Face Pieces) respiratory masks in accordance with DIN EN 149, thus completing its portfolio in the textile mask sector. The necessary functional and safety tests on community masks, medical masks and FFP respiratory masks contribute to consumer safety. In addition, Hohenstein has not only been a member of the German Mask Association since September 2021, which pools the expertise of all mask manufacturers and suppliers in Germany, but also supports the Quality Working Group with its expertise in the field of textile protective clothing.

Filtering Face Pieces are primarily used for the self-protection of the wearer and are intended to protect from harmful aerosols, particles and droplets. There are different protection levels for FFP respiratory masks (FFP 1-3), depending on how well they retain liquid and solid particles. In occupational safety, they are part of personal protective equipment (PPE) and fall under category III. Their protective function is specified throughout Europe by the DIN EN 149:2009-08 standard, which requires laboratory tests and practical performance tests with test persons. The Hohenstein testing laboratory carries out reliable proof of the safety of FFP respiratory masks in several test steps:

• Through visual inspection, the Hohenstein experts assess the correct labelling, the comprehensibility of the enclosed instructions for using the masks, as well as the functionality and packaging.   
• Laboratory tests can determine, among other things, breathing resistance, filter medium transmittance and inward leakage. The practical performance of FFP respiratory masks is assessed through realistic tests with test persons.
• Test persons can also be employed to assess other parameters such as skin tolerance, field of vision or headgear comfort.
• Optional tests, such as testing FFP respiratory masks for harmful substances, complete the safety verification.

Since the beginning of the pandemic, a particularly large number of FFP respiratory masks with doubtful and even false labelling have been in circulation, so reliable and neutral testing and certification of these products is essential. Hohenstein, with its many years of extensive experience in the testing and certification of personal protective equipment, thus offers the ideal service for customers who value testing quality "Made in Germany".

As a testing laboratory for medical devices, Hohenstein also offers testing of medical face masks for their bacterial filtering performance, differential pressure as an indicator of breathing activity, microbiological purity and cytotoxicity, among others. Medical face masks fall under the Medical Devices Regulation 2017/745 and fulfil the requirements according to EN 14683. The testing service provider Hohenstein has already taken a big step towards safety and functionality with the introduction of its quality label for Tested Community Masks in June 2020 and also tests according to the first European Guideline for Everyday Masks, the CEN Workshop Agreement (CWA) 17553:2020.

Albarrie – a major player in North America’s industrial nonwovens industry – is now benefiting from one of the first Monforts Montex stenter installations equipped with the full range of MonforClean heat recovery and exhaust air purification technologies.

With the new three-chamber Montex stenter at its plant in Barrie, Ontario, the Canadian company is treating specialised needlepunched nonwovens up to 4mm thick. These have applications in a wide range of filter media and performance fabrics.

The new Montex is enabling Albarrie to heat set and dry its materials to produce denser, higher quality fabrics which can also be finished and delivered to customers more rapidly.

Across timezones
It took a crew of skilled millwrights, electricians and product specialists to build the line which was delivered in 11 shipping containers to Albarrie’s production facility. The line was originally scheduled to be fully operational in the Spring of 2020, but the ongoing global Covid-19 pandemic inevitably led to several delays during the start-up and commissioning process.

Energy savings
The Albarrie Montex line’s MonforClean capabilities include an air-to-air cross flow heat exchanger and an electrostatic precipitator providing the ability to purify the exhaust air and to recover energy to a maximum of 22,500 cubic metres of air per hour, resulting in a radical reduction in the conventional heat supply required. The MonforClean was developed in cooperation with partner KMA Umwelttechnik, based in Königswinter, Germany.

The fully automated system is powered by a Siemens SPS S7 controller and KP 700 touch panel from which the recycled energy can be continuously monitored and savings calculated.

The three-chamber Montex stenter is fitted with the latest Monforts Qualitex 800 PLC control system with WebUI, providing ease of operation, a full operating cost overview and maintenance monitoring.

DiloGroup would like to thank all customers and interested parties for visiting the Dilo booth in Geneva. Despite the existing worldwide Covid, we were able to welcome a great number of well-known faces as well as meet new contacts, among them the most important nonwovens producers from across the world in all application areas: hygiene and lightweight nonwovens, technical textiles and needled nonwovens including geotextiles, filter media and automotive. The interest in using resource saving plant engineering, energy saving and the processing of natural fibres remains.

Dilo presented its latest developments in industry 4.0. Systematic plant monitoring and analysis of machine data allows simplified operation and more effective production. This smart system was illustrated with the aid of live analysis of the performance, quality and availability parameters of the production lines in our Textile Research Centre. The new production systems Hyperpunch Alpha, HyperTex and 3D-Lofter were explained with the aid of videos which led to a very positive responsive from the many different producers which are interested in running trials at the Dilo Textile Research Centre to further explore these subjects. These highlights and further new developments were the basis for fruitful technical discussions.

Knopf’s Sohn, a contract finisher of technical textiles, has installed a fully automated Montex stenter at its plant in Helmbrechts, Germany.
Knopf’s Sohn is processing technical textiles for the automotive, aerospace, home furnishings and workwear markets, based on wool, cellulose, polyamide and polyester fabrics, along with elastane blends, in weights of 80-800gsm.

The Montex machinery range is constantly being upgraded to meet evolving customer needs for greater automation, ease of operation and energy optimisation. The latest ten chamber line at Knopf’s Sohn, with a working width of up to 2.0 metres, was engineered to specific requirements in order to accelerate the company’s move to fully automatic control of its production, and high scaffolding was required for its installation.

The line benefits from two integrated ECO Booster modules to provide high energy savings. These compact, air-to-air heat exchangers, installed within the roof structure of the line, exploit energy from the exhaust gas to preheat up to 60% of the incoming fresh air entering the stenter.

The use of a single ECO Booster unit has been calculated to save up to 35% in energy costs, based on fixation processes. Fully automatic operation, set at the Monforts Qualitex control unit, ensures there is no additional burden on the machine operator.

The line is powered by Exxotherm indirect heating, which practically eliminates the yellowing which can be experienced during the treatment of certain polyamide and elastane-based fabrics, and is also equipped with a Conticlean circulating air filter system for constant high drying capacity.

Software
The latest Qualitex visualisation software offers operators reliability and easy control with its full HD multi-touch monitor and slider function, dashboard function with individual adaptation to operating states and faster access to comprehensive recipe data management.

With the Monformatic control system, the exact maintenance of the dwell time in combined treatment processes (drying and heat-setting) can be monitored. When the heat-setting point is reached, the fan speed is automatically adjusted, keeping energy consumption fully under control.

• A paper published in ACS Applied Materials Interfaces details effectiveness, describes protocol for future testing

An international team of scientists and engineers from the University of Cambridge, the Icahn School of Medicine at Mount Sinai, ResInnova Labs and Ascend Performance Materials has found that a nylon fabric embedded with zinc ions successfully inactivated 99% of the viruses that cause COVID-19 and the common flu.

Face masks, protective clothing and filters are used to slow the spread of viruses. But poor-quality masks can harbor active viruses from infected wearers, posing a transmission risk.

“A major challenge is absorption and inactivation,” said Vikram Gopal, Ph.D., co-senior author and chief technology officer at Ascend Performance Materials. “Respiratory viral illnesses, such as COVID-19, and the flu, are transmitted through droplets and aerosols. Polypropylene, the material in commonly used disposable masks, is a hydrophobic plastic and does not absorb moisture. Instead, the viruses can sit on the surface of the mask, posing a transmission risk when the mask is handled.”

Cotton also has problems, Dr. Gopal said. “Cotton effectively absorbs moisture, but it doesn’t inactivate the virus – again, posing a transmission risk,” he said. In the paper published in ACS Applied Materials Interfaces, the researchers described how a fabric made of nylon 6,6 embedded with active zinc ions absorbed virus-containing moisture droplets and effectively inactivated the particles. The fabric produced a 2-log, or 99%, reduction of virus particles in one hour.

The research team also was able to demonstrate that nylon with active zinc ions remains stable over time, keeping its virus-inactivating properties after 50 washes. “The study shows how nylon textile fabric with zinc outperforms the widely used cotton and polypropylene materials at virus absorption and inactivation,” Dr. Gopal said. The findings have significant implications for future development of PPE, Dr. Gopal said. “Pathogen-free PPE does more than just cut down the risk of transmitting the virus,” Gopal said. “By making PPE washable and reusable, you reduce the need for single-use products, keeping hundreds of millions of masks out of landfills.”

• Innovations in Protection, Efficiency and Engineered Fabrics

INDA, the Association of the Nonwoven Fabrics Industry, announced the three finalists for the prestigious RISE® Innovation Award during the 11th edition of the Research, Innovation & Science for Engineered Fabrics Conference, (RISE®) to be held virtually September 28-30, 2021.  The award recognizes novel innovations in the nonwovens industry that creatively use next-level science and engineering principles to solve material challenges and expand the usage of nonwovens and engineered fabrics. These three finalists will present their innovative material science solutions as they compete for the RISE® Innovation Award.

Canopy Respirator
Canopy is an innovative respirator that is fully mechanical, non-electrostatic, with a filter designed for superior breathability while offering the wearer facial transparency. The breakthrough respirator features 5.5mm water column resistance at 85 liters (3 cubic feet) per minute, 2-way filtration, and a pleated filter that contains over 500 square centimeters of surface area. The patented Canopy respirator resists fluids, and eliminates fogging of eyeglasses.  

Evalith® 1000 Series
Johns Manville’s innovative Alpha Binder is a formaldehyde-free, high bio-carbon content, toxic-free binder formulation ideal for carpet mat applications. Alpha Binder eliminates monomer and polymer synthesis, uses a bio-degradable catalyst, and requires 70% less water in manufacturing. The resulting glass mats made of Alpha Binder are named “Evalith 1000” and reduces energy consumption during manufacturing by over 70% compared to alternative petroleum-based binders. Evalith 1000 was commercialized in North America in 2020.

Fiber Coated, Heat Sealable, Breathable, Hybrid Membrane, Fabric Protection
TiGUARD protective fabric is a construction of monolithic or hybrid imperious/moisture eliminating membranes with a surface covered with micro-fiber. This nonwoven product is a multi-layer all polyester fabric specifically for chemical and microbial protective fabrics, products, and garments. It is constructed of compatible heat seal-able materials which lend themselves to high-speed heat seal-able production and ultimately automated manufacture of garments without sewing. It is a combination of a densely flocked polyester fiber surface on polyester membrane supported by polyester scrim.
Virtual RISE™ conference attendees include technology scouts and product developers in the nonwoven/engineered fabrics industry seeking new developments to advance their businesses. These attendees will electronically vote for the recipient of the 2021 RISE® Innovation Award, on Wed. Sept. 29th. The winner will be announced Thurs., Sept. 30th.

The conference program will cover timely and relevant industry topics including: Material Science Developments for Sustainable Nonwovens; Increasing Circularity in Nonwovens; Market Intelligence & Economic Insights; Promising Innovations in Nonwovens; Process Innovations in Nonwovens; Material Innovations in Nonwovens;  the full program can be viewed on the link: https://www.riseconf.net/conference.php

Under vacuum, the new BB Engineering large-area filter produces a homogeneous, pure melt with a targeted IV setting for instance, for returning polyester production waste to the melt flow, but also for achieving a homogeneous viscosity in the case of virgin material.

BB Engineering has expanded its melt filter portfolio to include a patented large-area vacuum filter designed especially for processing polyester waste. The so-called Visco+ filter is already known as the key component of the BB Engineering VacuFil recycling system. Now, it is also available as a separate and easily-integratable upgrade component for existing systems. Within this context, the uses of the Visco+ are by no means limited to just decontamination. Here, the Visco+ offers the following solutions:

• IV homogenization: if an existing production system is struggling with IV fluctuations, the Visco+ is able to actively intervene and balance out any irregularities;
• IV increase: if the final viscosity is insufficient when processing recycled materials, the Visco+ can increase the IV without the negative impact of long residence times.

In this way, the Visco+ enables fast and flexibly-controllable viscosity build-up and reliable viscosity monitoring of the polyester melt using a to-date unique, patented process. Depending on the intended end use, the melt can be ad-justed to the further processing procedure in a targeted manner. The requi-site melt properties above all the intrinsic viscosity, but also the purity and homogeneity are achieved in a reliable and reproducible manner and can also be adjusted during ongoing operation.

As a melt filter, the Visco+ operates like a liquid-state polycondensation unit. A maintenance-intensive reactor or a deposit-prone stirring unit are not required. Moisture is removed from the PET in the filter, which – in conjunction with an adjustable residence time – results in the desired IV increase in the vacuum. This enables a controlled IV build-up of up to 30%. The intrinsic vis-cosity is the central quality figure in PET recycling and rPET processing. It determines the melt performance in the downstream production process and the properties of the end products. The intrinsic viscosity is continually moni-tored by means of an integrated viscosity measurement unit and reliably adjusted in the event of deviations (caused by disparate input qualities, for ex-ample). At the same time, the filter provides an enormous material surface compared to the volume and continuously renews this. To this end, contamination can be removed particularly effectively from the starting material by means of automatically-regulated high-performance vacuum (1-30 mbar).

The Visco+ is particularly suitable for recycling PET waste that is to be reused for high-end products.

From the drinking water and food industries through water management and mining to the automotive and aviation sectors, mechanical filtration processes are used in almost every industry. As different as the methods, dimensions and special requirements of the filtration process are in each case – technical textiles and often tubular filters are almost always used. This means that tubular filters and narrow textiles by vombaur contribute to the safe and reliable separation or treatment of substances in the widest variety of filtration processes.

Individual solutions
The requirements placed on the textile, the material, the flow rate and the loading capacity of the filters depend on the respective use: a tubular for dewatering soil needs to withstand different forces than a tubular filter for the beverages industry. On the other hand, the latter needs to meet the highest hygiene standards. Because the requirements are so individual, vombaur develops customised filtration textiles for its customers all over the world.

Seamless tubular filters
At vombaur, filter media are round woven seamlessly on unique looms. As a result, they have identical surface properties all around and over the entire length, such as flow rate, loading capacity, shrinkage behaviour or material thickness

Narrow textiles for fabricating filter media
"We manufacture our narrow textiles from a wide variety of high-tech yarns. Sometimes monofilament yarn is used, sometimes multifilament, sometimes spun yarn. Like the type of weave, we select the raw materials depending on the function they need to fulfil," emphasises Gert Laarakker, Sales Manager at vombaur. "So that our filtration textiles reliably perform the job they are supposed to perform. Clean. Safe. Sturdy."

Neumünster/Troisdorf, Germany, December 3, 2020 – just a few days ago, the second newly-delivered Oerlikon Nonwoven meltblown system was commissioned at Innovatec’s state-of-the-art machine park. With it, the nonwovens manufacturer – based in Troisdorf in North Rhine-Westphalia – immediately started producing polypropylene filter nonwovens: in particular for use in protective face masks, which have been increasingly in demand since the start of the coronavirus pandemic and whose domestic manufacture is being supported by the Ger-man Government. Here, the highly-efficient Oerlikon Nonwoven meltblown technology from Neumünster is supporting the production of these highly-effective filter media.

“Back in June 2020, Oerlikon Nonwoven delivered the first so-called 2-beam system to Innovatec”, reports Rainer Straub, Head of Oerlikon Nonwoven. Together with the second production line, the Troisdorf-based enterprise has been able to almost double its filter nonwoven output to date. The North Rhine-Westphalian company now has filter media production capacities that can be used to manufacture up to 2.5 billion operating room filter masks or a billion highly-effective FFP2 masks per year.

The, according to its own information, leading manufacturer of meltblown mask nonwovens in Europe is participating in the German Government’s ‘Nonwovens Production’ grant program to ramp up its output capacities and has for this reason already received a visit from top German politicians, including Federal Minister for Economic Affairs Peter Altmaier and North Rhine-Westphalia Minister President Armin Laschet. Together, politicians and industry want to ensure that the production capacities for protective equipment continue to grow in Germany and that above all critical supply chains are secured at both national and European levels. And companies such as Innovatec and Oerlikon Nonwoven are actively contributing towards this.

Cooperation and business development with AMAC
As of November 1st, 2020, AMAC is pleased to announce its cooperation with company FibreCoat for the market introduction of their products and global business development. FibreCoat is a young, award-winning start-up and spin-off of the RWTH Aachen University in Germany and develops multi-filament coated yarns, fabrics and composites based on glass or basalt fibres.

Dr. Michael Effing, CEO AMAC GmbH: „FibreCoat is a very promising newcomer in the electro-magnetic shielding and composites industry and their innovations are very cost-efficient for new technologies such as e-mobility or telecommunications. I am very pleased to introduce them to relevant key players in the industry and accompany them in their growth strategy.“

Product Launch
FibreCoat develops metal-coated fibres like bi-component multi-filament yarns with basalt core and aluminum coating which can be used for EMI-shielding and heat sinks in battery casings, electric diverters in filters, reinforcement of cast aluminum parts o ras conductive yarns in smart textiles.

FibreCoat launches ALUCOAT™, an aluminum-coated glass or basalt fibre which is suitable as electro-magnetic shielding material in automotive applications such as radar, antennas or for autonomous driving as well as for mobile phones and applications in buildings. Due to its extraordinary thermal conductivity and better heat transfer compared to traditional composite material, it can be used for the manufacturing of automotive battery trays or industrial applications such as fine particulate air filters.

ALUCOAT™ is available as of January 1st 2021 as a yarn, fabric or non-woven with a wide range of possible titers and areal weight. The material will offer an electrical conductivity of 100 Ωm and a working temperature of at least 400 °C. Furthermore, it can be used for the shielding of low to high frequencies with an effectiveness of 80 to 120 dB.