From the Sector

At this year's JEC World, STFI will be presenting highlights from carbon fibre recycling as well as a new approach to hemp-based bast fibres, which have promising properties as reinforcement in lightweight construction.

Green Snowboard
At JEC World in Paris from 5 to 7 March 2024, STFI will be showcasing a snowboard from silbaerg GmbH with a patented anisotropic coupling effect made from hemp and recycled carbon fibres with bio-based epoxy resin. In addition to silbaerg and STFI, the partners Circular Saxony - the innovation cluster for the circular economy, FUSE Composite and bto-epoxy GmbH were also involved in the development of the board. The green snowboard was honoured with the JEC Innovation Award 2024 in the “Sport, Leisure and Recreation” category.

VliesComp
The aim of the industrial partners Tenowo GmbH (Hof), Siemens AG (Erlangen), Invent GmbH (Braunschweig) and STFI united in the VliesComp project is to bring recycled materials back onto the market in various lightweight construction solutions. The application fields "Innovative e-machine concepts for the energy transition" and "Innovative e-machine concepts for e-mobility" were considered as examples. On display at JEC World in Paris will be a lightweight end shield for electric motors made from hybrid nonwovens - a mixture of thermoplastic fibre components and recycled reinforcing fibres - as well as nonwovens with 100% recycled reinforcing fibres. The end shield was ultimately manufactured with a 100% recycled fibre content. The tests showed that, compared to the variant made from primary carbon fibres using the RTM process, a 14% reduction in CO₂ equivalent is possible with the same performance. The calculation for the use of the prepreg process using a bio-resin system shows a potential for reducing the CO₂ equivalent by almost 70 %.

Bast fibre reinforcement
To increase stability in the plant stem, bast fibres form in the bark area, which support the stem but, in contrast to the rigid wood, are very flexible and allow slender, tall plants to move in the wind without breaking.A new process extracts the bast bark from hemp by peeling.The resulting characteristic values, such as tensile modulus of elasticity, breaking strength and elongation, are very promising in comparison with the continuous rovings made of flax available on the market.The material could be used as reinforcement in lightweight construction.At JEC World, STFI will be exhibiting reinforcing bars that have been processed into a knitted fabric using a pultrusion process based on bio-based reinforcing fibres made from hemp bast for mineral matrices.

The adoption of composite parts based on flax fibres by the Marine Industry continues to grow, with major OEMs as well as smaller shipyards now aiming to take advantage of the reduced carbon impact and impressive mechanical properties they can provide.

“Over the last ten or fifteen years, several innovative flax fibre boats have been built and the fibre has started to gain significant traction,” says Julie Pariset, Innovation & CSR Director at the Alliance for European Flax-Linen and Hemp. “In addition to the environmental benefits, manufacturers are realising significant technical and processing gains with flax fibre composites.”

“Flax is a very low-density fibre, with a high specific stiffness,” she explains. “It can be used to manufacture composite laminates with mechanical properties not dissimilar to typical E-glass composites and the coefficient of thermal expansion of a flax fibre epoxy part is also quite close to that of a carbon fibre part.” This allows the materials to work well in combined assemblies with carbon fibre composites and the flax parts are also highly impact resistant.

Flax fibres also provide acoustic and vibration damping in composite applications, as well as providing a warm and aesthetically pleasing appearance below decks.

ecoRacer30
As a member of the Alliance for European Flax-Linen and Hemp, Bcomp, headquartered in Fribourg, Switzerland, has this year been working with Northern Light Composites (nlcomp), based in Monfalcone, northern Italy, on the creation of what is billed as the first fully recyclable nine-metre-long sailing boat – the ecoRacer30.

The boat is based on nlcomp’s proprietary rComposite technology – a combination of thermoplastic resins and BComp’s ampliTex high-performance natural fibre reinforcement fabrics and patented powerRibs technology.

It was built in a collaborative effort with the help of Barcelona-based Magnani Yachts, which took care of the composite manufacturing, and Sangiorgio Marine, which provided technical assistance as the boat was being assembled at its shipyard in Genova, Italy.

Magnani Yachts has subsequently become the first shipyard to hold an rComposite license and others are now being encouraged to adopt the technology.

The second ecoracer30 is currently under construction and has already been sold and nlcomp is planning to build a fleet of eight of these boats in time to enter a series of regattas in the summer of 2025.

Flax 27 Daysailer
Greenboats, based in Bremen, Germany, is another specialist in building boats from natural fibre composites and has this year launched the Flax 27 daysailer.

The lower hull of this vessel is also made from Bcomp’s ampliTex technical fabrics in combination with a sandwich core of recycled PET bottles. Using a vacuum infusion process, the fibres were integrated with a plant-based epoxy resin in order to further reduce the CO₂ footprint of the vessel.

The light structure and modern shapes of the lower hull of the boat result in very fast, sharp and agile handling on the water.

Greenboats has also recently announced significant new backing from alliance member Groupe Depestele, which manages 13,000 hectares of flax land in Normandy, France.

Blue Nomad
A project in Switzerland has meanwhile proposed the use of flax fibre composites in solar-powered habitats designed for comfortable living on the oceans – as the world grapples with the frightening implications of climate change and rising sea levels.

As envisaged by students from Institut auf dem Rosenberg in St Gallen, Switzerland working with Denmark-based SAGA Space Architects, Blue Nomad structures would form modular blocks to establish large communities and oceanic farms.
 

Price Trends

• The nearby cotton futures contract on the Intercontinental Exchange was down just 1% in December and closed the year at $1.84 per kilogram. A year earlier, the March contract closed at $2.30 per kilogram.  
  
  Cotton futures have been inverted for nearly three years because of supply chain disruptions that prevented normal on-time deliveries of international shipments. With the easing of container shortages and increased sailings, cotton futures are gradually reverting to the normal pattern in which contracts for forward delivery exceed nearby contracts by the cost of insurance, storage and interest between delivery months. The May and July 2023 contracts also finished 2022 at $1.84 per kilogram. In November, the May and July contracts were each several cents per kilogram lower than the March contract.
• The Eastern Market Indicator of prices for fine wool in Australia rose 9% in December to US$9.06 per kilogram. A year earlier, the EMI was $9.66. Australian analysts note that sheep for meat, cattle, and grain production, are competing alternatives for the use of land, and wool prices must continue upward if production is to be maintained in 2023.
• Prices quoted by the Indian Jute Balers Association (JBA) at the end of December converted to US$ fell 2% from a month earlier to an average of 74 cents per kilogram. The decline occurred entirely because of a weakening exchange rate. Prices in Rupee rose marginally. A year earlier, quoted prices averaged 84 cents per kilogram. The 16-percent decline year-on-year was caused about equally by a decline in quoted prices in Rupee and a weakening of the exchange rate.  
  
  The Indian jute industry is almost entirely focused on domestic demand, while half of total demand in Bangladesh comes from exports. Because of shortages of higher quality jute, export prices in Bangladesh are reportedly rising.
  (https://www.wgc.de/en/produkte/jute)
  
  India extended the anti-dumping duty at the end of December on jute and jute products imported from Bangladesh and Nepal for a period of five years. Bangladesh had urged the Indian government not to accept recommendations for extension, while the Indian industry was lobbying to ensure the duty remained in place. The duty rates range from approximately $6 per tonne at current exchange rates for low-quality fibres to $350 per tonne for finished products. The duty was originally imposed in January 2017 and was to expire at the end of 2022.
• Prices of silk in China rose 2% during December to US$28.0 per kilogram. Prices in yuan fell marginally during the month, but the RMB rose 3% against the USD. Prices of textile-grade silk in China were essentially unchanged at the end of 2022 compared with the end of 2021. However, prices closed 2022 about 40% above the average level pre-Covid. https://www.sunsirs.com/uk/prodetail-322.html and  https://businessanalytiq.com/procurementanalytics/index/raw-silk-price-index/ .
• Coconut coir fibre in India quoted in US$ remained in a narrow range, averaging $0.205 per kilogram in December. Prices in Rupee have been stable, and changes in dollar prices reflect changes in the exchange rate.

 
Production
 
World Natural Fibre Production in 2022 is estimated as of early January at 32 million tonnes, approximately one million below production in 2021 and down 900,000 tonnes compared with the estimate in early December.

World cotton production is estimated at 24.2 million tonnes in 2022/23 (August to July), 700,000 tonnes lower than in 2021/22 (ICAC.org). World cotton production rose from 20 million tonnes to 25 million between 2020/21 and 2005/06, but there has been no growth in the nearly two decades since.  
 
World production of jute is forecast down nearly 400,000 tonnes in 2022 because of inadequate rainfall during the harvest period to permit proper retting. Production in India is estimated up by 100,000 tonnes to 1.7 million tonnes, but production in Bangladesh fell by nearly one-third to just one million tonnes.
 
Production of coir, flax and sisal in 2022 are each estimated based on recent trends. Coir and flax have each been trending upward over the past decade, while world sisal production has been largely stable.

World wool production is forecast up 5% in 2022 to 1.09 million tonnes (clean), the highest since 2018. The Australian Wool Production Forecasting Committee issued its third estimate of 2022/23 production in December, keeping the estimate unchanged from September. Above-average rainfall in Australia, and across most of the Southern Hemisphere, is resulting in better pasture conditions and a rebuilding of sheep numbers. Sheep numbers shorn in Australia are climbing from 67 million in 2020/21 to 72 million in 2021/22 and to an estimated 75 million in 2022/23. https://www.wool.com/market-intelligence/wool-production-forecasts/  
 
According to the International Sericulture Commission (https://www.inserco.org/), silk production in China dropped from 170,000 tonnes in 2015 to 53,000 in 2020, with further declines estimated during Covid. Consequently, world silk production dropped from 202,000 tonnes in 2015 to 92,000 in 2020, and estimates of production during 2022 remain below 100,000 tonnes.

Fibres, fabrics, epoxy resins and adhesives from Sicomin have been used by Grand Largue Composites (GLC) to construct the first Class40 racing yacht to feature a significant quantity of flax-fibre reinforcements.
The yacht, called Crosscall, won the Class40 World Championships in June 2022 and is a prototype of the new Lift V2 design by Marc Lombard, one of the leading naval architects in this field.

Class40 is one of the most competitive fleets in yacht racing. The hulls of Class40 yachts must be light in weight, strong and stiff, and durable in the most extreme of conditions. Furthermore, to keep costs down, they cannot be reinforced with carbon fibres. The quality and reliability of the resins used for the infusion and lamination of the hulls are therefore of paramount importance.

Crosscall's cockpit was designed to be effectively non-structural, with the mainsheet, which can generate huge shock loads, supported separately. This would allow the cockpit to be made from a hybrid biaxial fabric comprising 50% flax fibres. Other parts of the boat that incorporate flax fibre include the tunnel, the engine cover, the ballast tanks and the cap. The rest of the boat is reinforced with 100% glass-fibre fabrics.

To help it realise this ambitious design, GLC, an infusion specialist, turned to its long-time material supplier, Sicomin. The hull was moulded and infused in one piece and the deck – including the hybrid flax-fibre cockpit – was also infused as a single part. The internal structure was then laminated into the hull by hand before the hull and deck were finally bonded together.

The infusion resin selected was Sicomin’s SR 1710, a high-modulus structural epoxy. Designed specifically for use in infusion and injection processes, it has exceptionally low viscosity and its low-reactivity hardener makes it suitable for the production of large parts. Composites components made from SR 1710 possess high interlaminar shear-strength and the resin retains its mechanical properties in wet environments.

Sicomin’s low-toxicity SR 8200 was used to laminate the internal structures onto the skin of the hull. Ideal for hand laminating, this system includes a choice of hardeners with a wide range of reactivities, which makes it equally suitable for making large or small parts. The hull and deck were joined together with Sicomin’s Isobond SR 7100, which demonstrates high fatigue strength and is very resistant to microcracking.

An epoxy bonding primer – called Undercoat EP 215 HB+ and supplied by Sicomin’s sister company, Map Yachting – was applied to the moulds first to make demoulding easier. It also serves as an undercoat in the polyurethane exterior paint system that is used instead of gelcoat to protect the epoxy hull from UV damage.

Since the launch of Crosscall, GLC has started building a second Lift V2 Class40 and a third one is now planned, both for which Sicomin will supply the materials.

The Discover Natural Fibres Initiative DNFI published their statistical World Natural Fibre Update this month. The world production of natural fibres is estimated at 33.7 million tonnes in 2022, a slight increase compared with a preliminary 33.3 million tonnes in 2021 and 31.6 million in 2020.

The DNFI Natural Fibre Composite Price dropped 2% in July 2022 to US 219 cents/kg, compared with US 223 cents the previous month. The DNFI Composite is an average of prices in major markets for cotton, wool, jute, silk, coir fibre, and sisal, converted to US$ per kilogram and weighted by shares of world production.

• The DNFI Composite was pulled downward primarily by a 9% decline in the Eastern Market Indicator of wool prices in Australia, which fell from US$ 10.27 per kilogram in June to US$9.38 in July.
• October cotton ICE futures (the nearby contract) finished July marginally lower, closing at 228 US cents per kilogram, compared with 229 at the end of June.
• Prices of jute fibre in India quoted by the Jute Balers Association (JBA) at the end of July were unchanged from a month earlier, but with depreciation of the Rupee versus the dollar, calculated prices fell from 84 cents to 82 cents per kilogram.
• Prices of silk in China equalled US$29.5 per kilogram in July 2022, coconut coir fibre in India held at US cents 21 per kilogram, and sisal in Brazil finished July at US cents 41 per kilogram.

Cotton prices were the highest in a decade during 2021/22, and world cotton production is estimated by the International Cotton Advisory Committee at 25.8 million tonnes during the 2022/23 season which began August 1, up from 25.4 million in the season just completed. Extreme drought in Texas, the largest producing state in the United States, is limiting the rise in world production that would otherwise be occurring.

World production of jute and allied fibres is estimated unchanged at 3.2 million tonnes in 2022 compared with 2021. High market prices in 2021 motivated farmers to expand planted area in both Bangladesh and India, but dry weather in jute-growing areas during June and July has undermined earlier optimistic hopes for yields. Rainfall was approximately half of normal in the city of Kolkata from early June to mid-July.

Production of coir fibre rose by an average of 18,000 tonnes per year during the past decade, and production was record high at 1.12 million tonnes in 2021. Production is expected to remain high in 2022.

Flax has also been trending upward, rising by an average of 27,000 tonnes per year, and production in 2022 is estimated to remain above one million tonnes.
World wool production is forecast up by 5% in 2022 to 1.09 million tonnes (clean), the highest since 2018. Wetter weather in the Southern Hemisphere, following eight years of drought, is allowing farmers to rebuild herds.

Cobra International, a leading manufacturer of advanced composite products for the watersports, automotive, marine, and industrial sectors, will highlight recent diversification into new composite markets at JEC World 2022, with exhibits ranging from VTOL drones to carbon fibre prosthetics.  Cobra will also demonstrate how it is working alongside automotive and water sports customers to further enhance the sustainability of products in these sectors.

High Volume Production Capacity for the UAV sector
Cobra will display a wing from the 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 survey, monitoring and search and rescue operations. Cobra manufactured the 32kg 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.  

Sustainability Options for Automotive and Watersports
Sustainability has a been a key focus for the Cobra Waterports division and CAC, the Cobra automotive business unit. At JEC World 2022, Cobra will showcase the increasing material and process options it has developed with both bio-resin and natural fibre reinforcements variants presented alongside more traditional carbon fibre parts.

Visitors will be able to get up close to a new Bio SUP Wingfoil board featuring a basalt, flax, bamboo and GreenPoxy bio-epoxy construction created for partners NSP, as well as state-of-the-art compression moulded prepreg foils. Cobra’s first fully recyclable surfboard incorporating the Recyclamine® resin technology that Cobra was recognised for in the 2020 JEC Innovation Awards will also be on display alongside a new Audi e-tron foil by Aerofoils – the world’s safest electric hydrofoil board.

The CAC team (Automotive Business Unit of Cobra) will present a set of OEM mirror cap parts that showcase a range of carbon SMC, woven visual carbon, pure woven visual flax, hybrid flax-carbon and painted flax construction options for the same component.  Clear carbon aesthetic and structural parts including CAC made M-carbon components for the BMW S 1000 RR Motorcycle will furthermore underline the high quality and eye-for-detail for which CAC is renowned.

Carbon Prosthetics
An entirely new composite application for the company, Cobra will also show two composite prosthetic devices at JEC which were productionised by the in-house design and development team. Working alongside a leading Thai university and a medical device OEM, Cobra created a rapid and cost effective series production process for a lightweight carbon fibre prosthetic foot. In another example of lightweight composites creating major quality of life improvements, Cobra has also designed and manufactured a carbon and glass fibre prepreg foot support for Elysium Industries.

• Hypetex® to Showcase Coloured Carbon and Flax Fibre Solutions
• Hypetex, London, April 20 2022, Booth R52, Hall 6

Hypetex, the market leaders in colouring carbon and natural fibre materials, will demonstrate both the processing and sustainability benefits of its patented colourisation technology when it exhibits for the first time at JEC World 2022.

Exhibiting as part of the Composites UK stand (Booth R52), Hypetex will display its portfolio of uniquely coloured carbon fibre materials including 3K woven styles, ultra-lightweight spread tow fabrics, UD, and 3D materials. Hypetex will also present details of its latest eco-friendly coloured flax materials  which combine sustainably grown natural flax with sustainable colouring technologies. Hypetex patented colouring technology, available in an extensive palette of standard and bespoke colours and shades, can be applied to traditional woven fabric constructions, non-woven UDs, spread tow and bespoke fabric designs. The technology replaces a traditional coloured painted finish, providing an exceptional depth of colour to any composite part, improving thermal conductivity and reducing heat absorption ,whilst reducing the overall weight and processing time with no compromise to the mechanical performance of the composite structure.

By removing the need for painting, and the associated preparation steps, Hypetex technology provides manufacturers with a repeatable straight out of the mould coloured finish, that is not only easy to integrate into all composite processes, but also takes additional materials, consumables, and process time out of the component cost. As part of its continued commitment to leading the drive for more sustainable composite solutions, and its focus on improvements based on the ESG framework. Hypetex will also display its new range of coloured flax fibre textiles. The advanced colouring technology used protects the natural flax fibres throughout the high temperature processes required for composite production, avoiding burning or any discolouration issues common to natural fibres. In addition, Hypetex colouring solution is an ecofriendly sustainable alternative to traditional dyeing processes which are a significant cause of global water pollution.

The Hypetex team will be on hand throughout the show to provide additional details on Hypetex materials and their integration into the manufacturing process. Visitors to the Hypetex stand will be able see Hypetex carbon and flax products in raw fabric, and how its unique colour palette translates into the most distinctive finished moulded components. Hypetex partners SHD Composites, Textreme, Sigmatex and Angeloni will also have materials and components on display at JEC World 2022, including sporting equipment such as racquets, sticks, and skateboards, which highlight the massive range of processing options and potential applications for this novel technology. One such application, the adidas Kromaskin field hockey stick, with a unique Hypetex coloured Textreme spread tow carbon finish, will also be part of the JEC Innovation Planets feature.