From the Sector

Garment fitting pioneer Hohenstein has conducted the first ever measurement series on babies and toddlers. The data will aid the pattern development and fit assessment that is particularly challenging for children's clothing. The new database will help brands and manufacturers design their children's clothing in an accurate, efficient and more sustainable way using fit testing and pattern optimisation.

Hohenstein has been taking body measurements for all target groups since 1957. Based on regular serial measurements taken with 3D body scans over 20 years, data is continuously updated. With the measurement of toddlers and babies, Hohenstein is now closing a large gap in the German market for the first time. 5626 girls and boys in sizes 56 to 182 were measured. This means that 3D scans of infants are available for the first time. The 3D body data form an indispensable basis for customer-specific measurement tables, child-friendly patterns and gradings, optimal fits as well as 3D children's avatars for the simulation of clothing.

Hohenstein offers a wide range of tests for safe children's clothing from a single source. In addition to fit and pattern, Hohenstein carries out risk assessments and safety tests for children's clothing (e.g. cords according to DIN EN 13682), UV protection according to different standards, tests for harmful substances according to OEKO-TEX®, among others. Toy testing is also part of the portfolio.

• Symm-Net articles made using the new MJ 92/1 B impress with their perfectly symmetrical appearance

Lace is a delicate seducer. The more finely crafted its ground structure, the more effective its refined designs come across, and as such, the higher the overall quality. The innovative Symm-Net pieces, which can be produced on KARL MAYER’s new MJ 92/1 B, have a look that sets new standards.

Lace offering maximum clarity and balance
Symm-Net lace is characterised by an extremely delicate design, offering absolute symmetry. This is thanks to the particular configuration of the MJ 92/1 B – the new multi-bar jacquard raschel machine features a split-design jacquard bar with separate threading, and can thus work using both equal and counter lapping. In addition, the newcomer has two ground guide bars at the back for counterlapped elastane. For Symm-Net’s ground structure, GB1 works a pillar notation whilst the jacquard bar works a counter-lapped inlay. The result is a net structure with absolutely symmetrical, clearly defined symmetry. To perfect the geometry, the two elastane bars with split threading – i.e. 1 in, 1 out – and counter-lapping patterning mirror the movement of the jacquard bar.

The lapping patterns thus look as follows:
• JB 91: 0 – 0 / 2 – 2 // and JB 92: 2 – 2 / 0 – 0 //
• GB 93: 0 – 0 / 1 – 1 // and GB 94: 1 – 1 / 0 – 0 //

The ground structure is not only more uniform, but also more stable than its counterparts manufactured with equal lapping. The advantages of Symm-Net are particularly visible when working finer mesh constructions. “When it comes to a delicate appearance, Leavers lace traditionally sets the standard; in particular, Endsor- Net is known for its delicate design. There is hardly any discernible difference with Symm-Net, which should open up new design perspectives, especially for the premium brands in Europe,” explains Jamie Heather, lace expert at KARL MAYER. Symm-Net offers a further advantage thanks to its simple pattern development. For example, the patterning process does not require any updates to the commonly used patterning software, SAPO and ProCad – only the machine database needs to be adapted.

High design flexibility
In addition to the Symm-Net variants, all existing patterns of the OJ 91/1 B, MJ 85/1 B and OJ 83/1 B can be implemented on the MJ 92/1 B in E 24 without restrictions; switching from the new counter lapping to the traditional JACQUARDTRONIC® LACE pattern is seamless. Jamie Heather is certain this flexibility will give customers a real competitive advantage.

All the prerequisites for a bestseller
The MJ 92/1 B has been successfully offered on the market since May 2021. The newcomer is available in gauge E 24, with a working width of 134". Despite its high design flexibility, it still offers first-class productivity. It can also reach speeds of up to 800 rpm when producing Symm-Net articles. To allow for diverse product design, 88 pattern guide bars and two elastane bars, arranged in 16 shogging lines, are available. Thanks to these features, the MJ 92/1 B mainly produces elastic galloon lace, but also all-over lace for stylish lingerie items.

Sicomin’s latest marine collaboration with Sonntag Fins sees its industry leading GreenPoxy® 33 bio-based epoxy resin used for custom carbon fibre windsurf fins - combining speed, fatigue performance and sustainability for some of the fastest sailors afloat.

Targeted at windsurf slalom sailors, racers and speed sailors, each Sonntag fin is a custom made product, tailored specifically to the user based on a discussion about riding style, physical size and weight, as well as how the rider likes to load the fin whilst sailing.  This attention to detail and bespoke manufacturing places a huge importance on the performance and consistency of the raw materials used, with all new materials having to be validated in production, on the test rig in the lab, and on the water by the team riders.

With this in mind, Sonntag Fins approached Time Out Composite, Sicomin’s German distributor,  looking for a new resin system that could reduce cycle times and improve manufacturing output.  Bio-based systems were discussed, but the first product used by Sonntag was Sicomin’s SR1280 laminating system which delivered immediate results, enabling shorter cure cycles, and exceeding all of the previous mechanical test targets.

In 2020, Sonntag and Time Out Composite revisited the topic of a more sustainable epoxy resin system. It was the perfect time for Sonntag Fins, with their new unique bright green UV resistant outer finish, to go green on the inside too with Sicomin’s GreenPoxy® 33 resin.

Test fins were produced with the new material performing well in production trials. Pure resin samples were also tested and post-cured at 140 ̊C, with the new GreenPoxy® 33 samples showing significantly higher elongation at maximum resistance, meaning the cured epoxy was less brittle and susceptible to damage should a customer’s fin meet a rock. With mechanical properties improved, Sonntag switched production to GreenPoxy® 33 in August 2020.

Sonntag fins are manufactured in CNC machined aluminium moulds using GreenPoxy® 33 and a bespoke lay-up of woven, stitched biaxial and heat-set unidirectional carbon fibre fabrics in four steps:
• The first step in the moulding process is the application of Sonntag’s unique green in-mould coating.
• Next, the individual fabric plies, cut using precisely machined templates, are placed into the mould and then wet-out with the low viscosity epoxy. With the laminate stack complete, the mould is closed and loaded into a heated press for around 2 hours to consolidate and cure the fin.
• After curing, the demoulded fins are tempered in an oven at 140 ̊C, then only a light sanding is required to create the final surface roughness for optimum flow characteristics in the water.
• Finally, the fins are cut to the required length and the base adapter is molded to the epoxy-carbon blade in a specific mould.
With each fin being optimized for its rider, it is critical that each piece produced will bend and twist in exactly the way it has been designed to do so, providing the rider with exactly the feel and feedback they want for their board and fin. Each Sonntag fin is tested on a unique CNC controlled servo and stepper motor driven test bench that Joerg has developed, building a database of test results that not only ensures the products perform as designed but also validating the consistency of the manufacturing process and raw materials.
“We produce high-performance windsurfing fins that need to accommodate significant loads during sailing. Fins need to combine flexibility with extremely high torsion stiffness that places high interlaminar shear forces on the resin, especially in our softer fins.” commented Joerg Sonntag, MD, Sonntag Fins. “A key requirement for us is a resin that maintains its mechanical properties for many years, and this is where the Sicomin systems deliver”