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Aerogel (c) Outlast Technologies GmbH
31.01.2023

Aerogel: Frozen Smoke for Clothing and Work Safety

Comprised of up to 99.8 percent air, aerogel is the lightest solid in the world. The material, which is also called “frozen smoke” due to its appearance and physical properties, exhibits extremely low heat conductivity which exceeds other insulations many times over. This is why NASA has already been using aerogel for aerospace projects for many years.

Despite this, it has not been possible to bind the material to textiles in a high concentration and enable straightforward further processing over the roughly 90-year history of the material. Outlast Technologies GmbH has developed an innovative process - a patent has already been filed for -  for permanently adhering large amounts of aerogel to different media, like nonwoven fabric, felt and composites materials. Their original properties are retained throughout, so they can easily be further processed using conventional production methods.

Comprised of up to 99.8 percent air, aerogel is the lightest solid in the world. The material, which is also called “frozen smoke” due to its appearance and physical properties, exhibits extremely low heat conductivity which exceeds other insulations many times over. This is why NASA has already been using aerogel for aerospace projects for many years.

Despite this, it has not been possible to bind the material to textiles in a high concentration and enable straightforward further processing over the roughly 90-year history of the material. Outlast Technologies GmbH has developed an innovative process - a patent has already been filed for -  for permanently adhering large amounts of aerogel to different media, like nonwoven fabric, felt and composites materials. Their original properties are retained throughout, so they can easily be further processed using conventional production methods.

The fabrics sold under the Aersulate name are only 1 to 3 mm thick and achieve very high insulation values which are largely retained even under pressure and in moist conditions. Despite their high performance, they are still soft and can be used for shoes, clothing and work safety products, as well as for sleeping bags and technical applications.
 
“Thanks to its extraordinary physical properties, NASA has already been using aerogel for many years,” remarked Volker Schuster, Head of Research and Development at Outlast Technologies. “For example, for the insulation of its Mars rovers and for capturing dust from the tail of a comet during the Stardust mission,” he continued. Since the development of aerogel by American scientist and chemical engineer Samuel Stephens Kistler in 1931, no-one had been able to apply the versatile material to textiles in large amounts without changing their original properties, despite intensive research. This means that the products were often not only very rigid, but made processing with conventional production methods impossible due to their high degree of dust abrasion. With the newly developed Aersulate technology, which was presented for the first time in June 2022, the Heidenheim-based specialist for textile thermoregulation is opening a different chapter in insulation history.

High-performance insulation just 1 to 3 mm thick
“The consistency of aerogel can be best described as liquid dust particles which spread uncontrollably throughout a room within seconds thanks to their minimal thickness,” explained Schuster. “This is why processing is a big challenge.” Outlast Technologies has managed, after a development period of around five years, to bring an innovative process involving the adhering of aerogel between multiple layers of material to market maturity. Depending on the area of application, nonwoven fabric, felt and different composite materials can be used as the media. What is special here is that the properties of the respective textiles are not adversely affected by the Aersulate technology, meaning that they can easily be further processed with conventional means and under industrial conditions despite their acquired thermal properties.
 
As a silicate-based solid, aerogel is obtained from natural quartz sand, yet exhibits a density over 1,000 times lower than glass manufactured from the same raw material. The extraordinary thermo-insulating properties of the material are thanks to its extremely porous structure, which enables it to be composed of up to 99.8 percent air.
 
“One liter of aerogel weighs just 50 g,” explained Schuster. “Just 10 g of the material has the same surface area as a soccer field, though.” Thanks to these properties, Aersulate textiles exceed all other previously known insulation materials in terms of performance, despite the fact that they are only 1 to 3 mm thick. Tests carried out by the German Institute for Textile and Fiber Research in Denkendorf (DITF) using the Alambeta method showed that the thermal resistance of an Aersulate fleece is more than double that of a conventional fleece of the same thickness. Add to this the fact that the thermo-insulating properties of Aersulate products remain high despite pressure and wetness, while they decrease enormously with other conventional materials like felt and polyurethane foam (PU) under these conditions.

Work safety and functional clothing with Aersulate
Thanks to the textile medium, thin Aersulate products are especially suitable for the shoe and clothing industry, as well as all areas of work safety. The user benefits from different properties, depending on the intended use. “With a glove made of Aersulate just 1 mm thick, you can put your hand into boiling water without being scalded, for example,” explained Schuster. “The material’s extremely hydrophobic properties play quite literally into our hands here.” In the case of knee patches on work and functional pants, as well as shoes and soles, on the other hand, the material properties also become relevant when compression occurs. This is because the thermo-insulation properties of other materials would be reduced little by little due to moisture from the outside and sweat from the inside on the one hand, and by the continual influence of body weight on the other.
          
In addition to the human body, luggage and technical devices can also be protected from extreme temperatures and the effects of weather with Aersulate. For this purpose, corresponding cell phone or equipment pockets could be sewn into garments, for example, to maintain their battery life even at very cold outside temperatures and to safeguard the devices from overheating in case of high heat exposure. “With the broad range of possible textile medium materials, Aersulate is suitable for all applications requiring high thermal resistance on the one hand, where only a little space is available and both compression and moisture can be expected on the other,” said Schuster in summary.

Source:

Outlast Technologies / Textination

Performance Days November 2017 © Performance Days
28.11.2017

NEW RECORDS SET AGAIN AT PERFORMANCE DAYS IN MUNICH

The recently concluded trade fair once again demonstrates: The PERFORMANCE DAYS concept works! At the 19th edition of the trade fair for functional fabrics and sport accessories, new top ratings were achieved in all areas.

The recently concluded trade fair once again demonstrates: The PERFORMANCE DAYS concept works! At the 19th edition of the trade fair for functional fabrics and sport accessories, new top ratings were achieved in all areas.
Innovation is the specialty at PERFORMANCE DAYS. The functional fabric trade fair has a reputation for being the first to show the newest trends way ahead of the other trade fairs and industry gatherings. The fair offers several unique tools such as the Focus Topic, the PERFORMANCE FORUM with the PERFORMANCE TABLES and the PERFORMANCE WALL, the PERFORMANCE AWARDS, the comprehensive presentation and workshop program as well as the guided tours. What makes this fair so special? Not only the free admission to the fair, but all of the top quality programs are also free of charge! So much commitment to service and trend scouting pays off: The recent trade fair held on November 8-9th, 2017 at the MTC in Munich once again broke all previous records!

Visitor and Exhibitor plus
The halls of the MTC were filled to maximum capacity and recorded significantly more visitors than the previous fair last April and even more than the fair in November 2016. The number of trade visitors rose from 1868 in November 2016, to 2001 breaking the 2000 mark for the first time. This growth corresponds to a 7.1 percent increase. In comparison to the previous year, the number of exhibitors was also greater in autumn 2017, registering a 9.9 percent increase. A total of 177 exhibitors from 23 countries occupied all of the halls to capacity, confirming the decision to relocate to the halls of Messe München, which is scheduled for November 2018. Even now, shortly after opening the exhibitor registration period, demand is already higher than the number of available spaces.

The move to Riem
When the doors of PERFORMANCE DAYS open next year on November 28-29th, 2018, the trade fair will be celebrating not only its 10-year anniversary, but also the first edition of PERFORMANCE DAYS at the new location. In the future, one of the large halls on the exhibition grounds in Munich-Riem will be provided twice a year for functional fabrics. For the debut, it will be located in Hall C1, with easy access via the north-west entrance from the west parking garage.

All highlights also provided online
As usual, when the most recent exhibit comes to a successful close, a special service is made available to all those who did not have enough time: All the highlights and important information like the presentations (also as a podcast!), as well as all the fabrics at the Forum will be available directly at www.performancedays.com. Even more interesting for you: Samples of all featured PERFORMANCE FORUM fabrics can be ordered online, which means direct sourcing of materials is now possible from the comfort of your office.
A special highlight of the past exhibition was the Focus Topic "Thermal Technologies – From Fibre to Smart Textiles." The topic covered the entire spectrum of heat retention and generation in sports clothing, as well as the ECO PERFORMANCE AWARD. The award winner was Pontetorto for the development of the first fleece to be produced with a brushed inside and with particles and fibers that are biodegradable even in sea-water. This innovation was a joint development between Vaude and Lenzing. The workshop presented by Ana Kristiansson about the possibilities of founding a sportswear brand was also very well received.
Besides the familiar exhibitors like Invista, Cocona/37.5, Lenzing, Microban, 3M, bluesign, Burlington, Dyneema, Nilit, Outlast, Pertex, Polartec, Pontetorto, PrimaLoft, Schoeller, Singtex, Sympatex, Südwollle, Toray, and YKK; the Messe welcomed new exhibitors like Freudenberg Performance Materials, Clo Insulation, Flying Textile, Inuheat Group, ISKO ARQUAS, Manifattura Effe Pi, The Woolmark Company, and Tough Knitting Enterprise.

About PERFORMANCE DAYS
PERFORMANCE DAYS — The “functional fabric fair” launched in 2008, is the first and only event created especially for functional fabrics for sports and work clothing. The aim of the semiannual trade fair is to give leading and innovative textile manufacturers, suppliers and service providers the opportunity to present their functional fabrics, membranes plus treatments, laminates, paddings, fin-ishes, and accessories such as yarns, tapes, prints, buttons and zippers.
The industry experts who come to this fair – the sports fashion designers, product managers, and decision-makers (see online: Visitor List) represent almost every European active clothing and func-tional wear manufacturer – can find a complete selection of high quality materials available at just the right time in April/May and November. The dates are intentionally scheduled early thanks to our expertise in functional fabrics and are optimal for summer and winter sport collections. (All trade fair catalogs from past events are available online at Catalogs as well as a listing of current exhibitors at Exhibitor List).
 
The relaxed and focused workshop-like atmosphere at PERFORMANCE DAYS differentiates it from the other fairs which are often unmanageable and more stressful. That is one of the reasons why the Munich trade fair at the heart of the European sportswear industry has become one of the top addresses for new fabrics, innovations, and is the preferred meeting place to conduct business.
In the unique PERFORMANCE FORUM of PERFORMANCE DAYS, the visitor receives an inspiring and well-grounded overview of the new materials, trends, and innovations of the exhibitors. The PERFORMANCE AWARD and the ECO PERFORMANCE AWARD are also presented here. Qualified guest speakers present special topics and their collaborative ventures in guided tours, workshops and presentations to complete the range of information provided at PERFORMANCE DAYS within the Program (see after the fair online in the Presentation Library).
No entry fee and free admission to all events for industry visitors.