From the Sector

Litzen, Kabel, Mantelleitungen oder auch Rohre, Schläuche und Profile aus weichem PVC umdruckfest zu kennzeichnen, ist eine Herausforderung in der Kabel- und Extrusionsbranche. Eine von Drucker-Spezialist LEIBINGER entwickelte schwarze Tinte ist resistent gegen Weichmacher und verhindert Abdrucke auf Nachbarkabeln.

Extrusionsprodukte wie Kabel, Mantelleitungen, Schläuche, Rohre oder Profile bestehen zu einem hohen Anteil aus Polyvinylchlorid (PVC). Dieses wird je nach Anwendung mit Weichmachern versetzt, auch „softener“ genannt. Nach der Produktion werden die bedruckten Kabel in der Regel aufgewickelt. Aufgrund der „Weichmacherwanderung“ zeigt sich beim späteren Abspulen unter Umständen ein Abdruck oder „transfer print“ auf dem Nachbarkabel. Um das zu verhindern, gibt es jetzt eine spezielle PVC-Tinte. Sie ist beständig gegen Weichmacher und verhindert somit den oben beschriebenen Effekt eines unerwünschten Abdrucks. Mit einem BWS-Ranking (Blue Wool Scale) von 8 weist sie außerdem eine ausgezeichnete UV-Stabilität auf, die z.B. beim Einsatz auf Windowspacern besonders wichtig ist. Die Tinte trocknet sehr schnell und eignet sich daher auch perfekt für Highspeed-Anwendungen.

Freudenberg Performance Materials (Freudenberg) will be presenting new applications for its European environmentally-friendly Evolon® microfiber technology for Fall/Winter 24/25 fashion and leather goods collections at Lineapelle, from September 19-21. These include solutions for artificial leather applications suitable for the shoe, furniture and automotive industries.

Evolon® sustainable microfiber coating substrates
Evolon® microfiber fabrics are ideal coating substrates for artificial leather applications in the shoe, furniture and car industries. They are particularly suitable as a carrier material for PU and PVC coatings. Evolon® microfiber materials have non-fraying edges, which makes converting easier and quicker. They contain 80% recycled PET from Freudenberg’s in-house bottle recycling plant. Furthermore, they are manufactured with no solvent and no chemical binder in the company’s Evolon® plant located in Colmar, France. The plant is accredited according to OEKO-TEX STeP sustainability manufacturing certification and the DETOX TO ZERO criteria. European manufacturing offers logistic benefits to European customers through shorter supply chain and transport routes.

Reinforcement material for leather goods
Manufacturers of leather goods also benefit from Evolon® microfiber when they use it as a reinforcement material for original leather. It is drapable and soft and provides optimal shaping support for leather. In addition, Evolon® materials offer important sustainability advantages for the manufacturing of luxury leather bags, such as being 100% made in Europe, eco-friendly and socially-responsible production, and the use of recycled raw materials.

Freudenberg Performance Materials (Freudenberg) is presenting its sustainable Evolon® product range for reusable technical packaging for highly-sensitive parts at Fachpack 2022 in Nuremberg, Germany from September 27-29. The microfilament textiles offer improved surface protection for molded plastic parts, painted parts and so-called class A parts, thus providing customers with significant savings potential.

Evolon® RE is the most sustainable product in the portfolio. It contains the highest percentage of recycled PET and has a smaller carbon footprint. The new Ultra Force range from Evolon® offers extremely high mechanical strength and eliminates the need for PVC in the transportation and protection of large, heavy parts. Freudenberg has developed the ESD range (electro-static discharge range) for the packaging of sensitive electronic components: it offers permanent electro-static discharging and its surface resistivity can be customized.

The Techtextil and Heimtextil Summer Special exhibitions, taking place together in Frankfurt from June 21-24, represent an opportunity for Monforts to showcase its finishing and coating technologies for two of its major markets – especially at a time when energy prices continue to soar for textile manufacturers in Europe.

Existing customers of Monforts include many manufacturers in the field of home textiles, as well as those making geotextiles, automotive fabrics and other functional materials – all of whom will be well represented in Frankfurt this June. Dedicated Montex lines have also been supplied to producers of airbags, flame retardant barrier fabrics and spacer fabrics, as well as high-temperature filter materials.

Energy prices are rising steeply everywhere and a particular emphasis for Monforts in Frankfurt will be on the energy and heat recovery that can be achieved with Montex stenters, through features such as better insulation of the treatment chambers or the MonforClean system, in which waste heat from the drying process is used to pre-heat the drying air resulting in a radical reduction in the conventional heat supply required compared to gas and thermal oil heating. The modular system for heat recovery can also be extended for exhaust air cleaning and odour elimination. Monforts can provide a range of further resource-saving and energy recovery options tailored to each individual line installation including modification of the heating source.

With the Qualitex 800 visualization software, all article-specific settings can be stored and the formulations for thousands of treatment processes called up again at any time. Individual operators can also personalise their dashboards with the most important machine functions and process parameters.

The Qualitex 800 system is available for the automatic and continuous operation of the company’s Montex stenters, as well as its Thermex continuous dyeing ranges, Monfortex shrinking systems and Montex®Coat coating units.

Monforts Montex®Coat coating units serve an equally diverse number of markets, including tents, tarpaulins and awnings, black-out roller blinds and sail cloth, automotive interior fabrics and medical disposables. Full PVC coatings, pigment dyeing or minimal application surface and low penetration treatments and solvent coatings (in explosion-proof conditions) with knife coating, roller coating or screen printing can all be accommodated with this system.

All of these very different materials require coating and finishing for maximum efficiency, using Monforts technologies which provide the ultimate in flexibility and the ability to switch quickly from one fabric run to the next, without compromising on the economical use of energy or raw materials.

The Monforts EcoApplicator offers further potential for sustainably achieving perfect finishes via a precise direct application system, as an alternative to conventional padding – where fabrics are immersed in a bath of the required finishing chemicals. It can significantly further reduce the energy and water required and finishes can be applied on just one side of the fabric, or both, and even separately on each side, to be sealed in place via different heating zones in the stenter.

Cobra International will showcase its portfolio of design and manufacturing solutions for the unmanned vehicle systems sector when the company exhibits alongside long-term partner HiveGround at the AUVSI XPONENTIAL 2022 conference.

Taking centre stage on the Cobra stand will be a fully assembled Swiftlet UAV. This compact tactical fixed wing UAV platform has a 5.5m wingspan and was developed by the Royal Thai Air Force and National Science and Technology Development Agency (NSTDA) for a broad range of survey, monitoring and search and rescue (SAR) operations. Cobra manufactured the 30kg Swiftlet composite airframe using a combination of CNC cut carbon sandwich internal structure and PVC foam sandwich skins using both high grade glass fibre and carbon fibre reinforcements.

Visitors to the Cobra stand will also see the VETAL, a twin rotor vertical take-off and landing (VTOL) drone with a composite airframe manufactured by Cobra for HiveGround, the Thailand based developer of UAV surveying and robotics systems.

At AUVSI XPONENTIAL, Cobra will also illustrate how the company leverages innovation and expertise developed in its water sports and automotive business to enhance its product offering to the UAV sector. Products on display include a Fliteboard electric foiling surfboard, pre-preg hydrofoil parts, lightweight medical prosthetics, flax and forged carbon parts, as well as a full set of visual carbon and painted automotive trims, each demonstrating the company’s high volume production capacity for ultra-light carbon composite structures.

The show will take place from the 25 to 28 April at the Orange County Convention Center, Orlando, Florida.

Flexibility, product uniformity and automation are the keys to success for coating businesses in today’s rapidly-changing technical textiles industry, explained Jürgen Hanel, Monforts Head of Technical Textiles, at the recent 1st World Congress on Textile Coating.

Introducing the latest Montex®Coat magnetic roller coating option to virtual delegates from around the world at the conference organised by International Newsletters, Hanel explained why this technology makes perfect sense now

“The magnetic roller system allows a wide range of coatings and finishes to be carried out, while being easy to handle for operators and much easier to clean at the end of the process,” he said. “It provides textile finishers with an expanded range of options due to the fully-adjustable positioning of the magnet within the roller and with four different magnet positions possible, can be set to operate both as a direct coating system and as an indirect coater.”

With traditional dip coating systems, he added, as well as with many standard knife coating technologies, there is always a difference in the tension between the centre and the edges of the wide width fabrics being treated – and hence the amount of pressure with which the coating is applied. With the use of a magnetic roller, equal pressure is applied across the full width of the fabric, with consistent results even at wide widths of over 2.4 metres. In addition, adjusting the roller surface, rather than changing the coating formulation to match the required add-on and viscosity for each coating effect required, leads to much higher output from the line.

Cleaner and less wasteful
The contribution of such flexible and resource-saving new technologies to a cleaner and less wasteful textile industry was a key theme at the congress – held virtually across the four afternoons of February 11th, 12th, 18th and 19th – as was digitalization and the many advantages it is providing.

“A typical integrated Monforts coating line is automated from the inlet feed to the winder,” Hanel told delegates. “Adjustments can also be made simply and easily from the touchscreen and with the new hand-held remote controller which has recently been introduced for the Montex®Coat unit.”

Manual adjustment, he added, is time consuming and needs the attention of an experienced operator or the reproducibility will not be accurate between coating operations. The adjustment by motors allows each coating to be stored and downloaded again for 100% reproducibility.

The motors can be fully controlled from the touchscreen and all necessary adjustments carried out remotely, making switching from one process to another extremely quick and easy.
The accuracy that is now being demanded by today’s most exacting customers is met with an optional carbon fibre roller – especially in dealing with the winding tension required in the processing of materials such as prepregs for composites and other heavyweight fabrics. Typical applications for the Montex®Coat include the finishing of tents and awnings, black-out roller blinds and sail cloth, automotive interior fabrics and medical disposables. Full PVC coatings, pigment dyeing or minimal application surface and low penetration treatments can all be accommodated.

“The World Congress on Textile Coating was characterised by some very stimulating presentations and forums between the speakers and a global audience of textile specialists,” Jürgen Hanel concluded. “It truly reflected the high level of positive changes now taking place in not just textile coating, but the entire textile industry. I look forward to the next edition, which hopefully will be a face-to-face event for even deeper level discussions and debate.”

Following the successful commissioning of two new Monforts Montex wide-width stenter lines and additional environmental management equipment at its plant in Germany, GtA – Society for Textile Equipment GmbH – is aiming to be the first textile finishing company to become entirely CO2-neutral in the manufacture of all of its products by 2025.

GtA is a partner company to Germany’s large-format digital printing fabric leader, Georg and Otto Friedrich GmbH, which has has this year been able to considerably expand its portfolio due to the new Monforts lines.

Headquartered in Gross-Zimmern, close to Frankfurt, Georg and Otto Friedrich GmbH and its partners in Germany have an annual production of 37 million square metres of warp knits for a range of end-use applications, including garments, automotive interiors and technical textiles, but increasingly with a concentration on digital printing substrates.

Fault-free textiles

A new standard in pure white, 100% clean and fault-free textile substrates has been demanded by this market in recent years due to the rapid growth in digitally-printed banners and billboards – often referred to as ‘soft signage’.

The substrates of choice for digital printing are 100% polyester warp knits which are resilient and allow excellent take-up of inks, and vibrant colours and clear and precise images to be achieved with digital printing techniques. The knitted construction also has the advantage of elasticity, which is a plus in terms of flexibility for installers.

Critically, the warp knitted fabrics have extremely smooth surfaces which is becoming increasingly important due to the general move away from PVC coatings which were the standard in the past.

It was to finish these fabrics for Georg and Otto Friedrich GmbH as well as providing such services for many other customers, that the GtA plant in Neresheim, Baden-Württemberg, was established in 2015.

The purpose-built plant on a greenfield site was initially equipped with a fully-automated, 72 metre long Monforts installation comprising a washing machine integrated with a 3.6 metre wide, seven-chamber Montex stenter. The line quickly went from single to double shift production and then to 24/7 operation  to meet demand.

Expanded widths

Building on the success of this installation, GtA has now installed two more Montex stenter lines – both in expanded working widths of 5.6 metres and purpose-built at Montex GmbH in Austria.

A six-chamber Montex unit is combined with a washing machine to guarantee the purity of the substrates, while a five-chamber line is integrated with a wide-width coating machine. This new coating capability at GtA has led to a number of new additions to the Georg and Otto Friedrich DecoTex range for digital printing, including wide width fabrics with flame retardant, antimicrobial and non-slip finishes.

The new Montex stenter lines benefit from all of the latest innovations from Monforts, including the Smart Sensor system for the optimised maintenance planning of key mechanical wear components on the stenters. A comprehensive overview of the condition of all parts at any time is now available for operators within the highly intuitive Qualitex visualization software.

With Qualitex, all article-specific settings can be stored and the formulations for thousands of treatment processes called up again at any time. Individual operators can also personalise their dashboards with the most important machine functions and process parameters.

Environmental commitment

GtA is run by a seasoned team of textile professionals led by Managing Director Andreas Niess.

“We have received excellent service from Monforts from the outset and we were happy to place the order for these two new lines as part of our ongoing cooperation,” he says. “With all of the latest Monforts advances in technology we are fully in control of all production and quality parameters with these lines, as part of our significant commitment to innovative environmental technology.”

The GtA plant, which operates in near-cleanroom conditions, has also been equipped with proprietary technology to fully exploit the Monforts air-to-air heat recovery systems that are now standard with Montex stenters.

“Around 30 per cent of our investment volume at the site goes to energy-saving measures and we are sure that this commitment is worthwhile,” Mr Niess says. “As an example, our integrated heat recovery system fully exploits the waste heat from the process exhaust air and the burner exhaust gases of the Monforts stenters, allowing us to achieve an exhaust air temperature of  between 30 to 34°C, compared to what would conventionally be between 140 to 160°C. Another focus has been on exhaust air purification technology and here too, the latest technology has been installed with integrated heat recovery elements.”

This, he adds, saves 52% of the energy that would normally be used – equating to 5,800,000 KwH per year. The necessary audits for energy-efficient companies are also carried out annually.

In addition, GtA has purpose-designed the automatic chemical mixing and dosing systems that feed the padders for the key treatments that are carried out on the fabrics through the stenters.

The company is going further, however, in its pursuit of clean production and raw materials.

"We want to be an asset and not a burden on our immediate environment and therefore do not use any additives containing solvents," Mr Niess says. “We were the first to use fully halogen-free flame retardant chemistry, and we use bio-based, finely ground alumina products for the washing process instead of surfactants. PES polyester yarns made from recycled material are also increasingly used and the latest additions to our raw materials portfolio, the RC-Ocean products, are made from recycled sea plastic.

“We are now planning a combined heat and power plant for the production of electrical energy and heat and we will also build a photovoltaic system that converts solar radiation into electrical energy. GtA wants to be the first textile finishing company to be CO2-neutral in the manufacture of all of its products by 2025. The complete heat supply and heating for the 13,000 square metre production hall, as well as the office building and the hot water supply for the domestic water, is already energy-neutral. We are convinced that this commitment will pay off in the long term and our positive business development proves that sustainability and business profitability are perfectly compatible.”

In addition to the products for Georg and Otto Friedrich GmbH, GtA  offers its manufacturing capacities for other customers as a contract service.

All products are manufactured in accordance with Öko-Tex Standard 100, product class 1 and the company is also involved in the research and development of new sustainable manufacturing processes, in cooperation with many regional universities and funding project partners.