From the Sector

Stratasys Ltd. announced the launch of its Direct-to-Garment (D2G) solution for the J850 TechStyle™ printer, the newest offering in the Stratasys 3DFashion™ direct-to-textile printing technology. The first example of its application is an Urban Tattoo denim collection which will be revealed at the Texprocess exhibition in Frankfurt, Germany on April 23.

The D2G solution is ideal for customization and personalization by enabling the application of full color multi-material 3D print directly on fully assembled garments of various fabric types including denim, cotton, polyester, and linen. It allows fashion brands to facilitate personalized and bespoke designs for customers, including the ability to tailor 3D prints according to individual preferences, sizes, and styles.  

Available in two sizes, the D2G tray kits facilitate the personalization of garments ranging from jeans to jackets, enabling designers and manufacturers to adopt more sustainable practices by reducing material waste. The seamless workflow delivers ease of calibration and compatibility with various garment sizes, streamlining the production process and fostering the creation of unique, personalized apparel.

Demonstrating this innovation, the Urban Tattoo collection showcases the potential and the ease of direct-to-garment 3D printing. Working with noted designers Karim Rashid, Travis Fitch, Zlatko Yanakiev at Meshroom along with Foraeva Studio, this collection shows the transformation of ordinary garments into pieces of wearable art, imbuing them with personal identity and meaning.

Like body tattoos, Urban Tattoos promote a deeper emotional connection, encouraging the upcycling of existing garments and contributing to a more sustainable fashion ecosystem. This aligns with Stratasys’ strategy for Mindful Manufacturing™. Stratasys has been able to create a new collection that will appeal to multiple brands that reach across diverse socio-economic backgrounds.

In recent years, Italian circular knitting machine manufacturer Santoni (part of the Lonati Group) and Groz-Beckert have worked together to develop a new self-cleaning knitting system for the INNOTAS circular knitting machine. The knitting system is also called INNOTAS and consists of the circular knitting machine needle SAN™ DUO and the corresponding sinker SNK DUO-OL.

Following various preliminary investigations, the go-ahead was finally given in January 2015 for the joint development of a self-cleaning system in the needle area with side-by-side needles and a low shank.

The circular knitting machine needle SAN™ DUO with the sinker SNK DUO-OL was developed to meet the desired requirements. In the knitting system, there are two needles in the needle channel and two sinkers in one sinker channel. The benefits became apparent in initial field trials with experienced end customers in 2016. In the following years, the knitting system was continuously analyzed and further optimized.

The double filling in the needle channel significantly reduces soiling. In addition, the further developed shape of the knitting system ensures that any yarn lint is automatically removed from the machine during the knitting process. This extends the cleaning interval, making work more time-efficient and increasing productivity.

Both the needle SANTM DUO and the sinker SNK DUO-OL are characterized by a particularly low shaft with a predetermined breaking notch. The low shank minimizes soiling, while the predetermined breaking groove enables controlled needle breakage in the event of wear at the desired point. This reduces errors in the knitting process and machine downtimes.

Cavitec, part of Santex Rimar Group, presents the redesigned Caviscreen at Techtextil Frankfurt. Caviscreen features latest technology for breathable laminates.

Caviscreen was developed as a hotmelt coating and laminating unit for breathable sportswear, rainwear and protective clothing – with and without applying a membrane. The redesigned machine shows a brand-new method to supply adhesive more evenly and precisely. Using PUR adhesive (polyurethane reactive adhesive) goes with additional benefits like strong bonding capabilities and versatility.

Caviscreen’s hotmelt screen printing is a special system for high-end application garments. With this Caviscreen system, a PUR adhesive is transferred onto the substrate through a rotary screen, similar to the well-established textile printing method. The adhesives are fed from the drum melter through a heated hose to the traversing adhesive distribution system inside the rotary screen, just behind the doctor blade.

The adhesive is pressed by the doctor blade through the screen holes and transferred to the substrate. Different dot pattern (mesh or irregularly) and different screen thicknesses allow different coating weight and adhesive coverages.

The traversing adhesive dispenser is used to distribute the adhesive automatically over the set working width that – an additional technical benefit – can be set without any mechanical changes.

Cavitec’s screen coating system achieves high bonding strength while using less adhesive than other coating processes, because of applying the coating on the surface of the substrate and like this, the adhesive has less tendency to penetrate the substrate.

Bonding strength, softness of the fabric and the breathability are defined by the coating weight and the coverage. The rotary screen allows users to regulate and adapt the coverage respectively the coating weight. Cavitec offers a large selection of screens that are essential to fulfil the fabric requirements. A further advantage is the ease and efficiency of switching from one screen to another by simply unlocking the bayonet fitting. The IR-heater cover opens pneumatically and the lightweight screen can be easily removed by hand. Unlike with other methods, there's no need to deal with hot oil or any other heated liquid that requires cooling down.

The Caviscreen technology supports manufacturers by reducing costs with screens priced at a mere fraction, just 10%, of common gravure roller prices.