32 C
Lahore
Friday, March 29, 2024

Groz-Beckert: Special application needles for reliability when knitting technical textiles with filament yarns

The development of tailored needles for special applications is one of the strengths of Groz-Beckert – one example from the flat knitting sector is the special application needle SAN™ TT.

It starts with the idea
Every innovation starts with the idea of creating something special, something new or something better. At this point, the implementation is still far in the future. Existing technologies are often not the optimal solution for a newly developed application. With Groz-Beckert experience and expertise, Groz-Beckert is able to create the technical requirements not only for standard cases, but for special cases too. As development partners, Groz-Beckert thus contribute to the implementation of your idea.

SAN™ TT 112.70-62 G01

A field with high potential for new and further developments, which seemed unimaginable until recently, is technical textiles. New products are being created here, new production methods, as well as constant new challenges. In order to meet these challenges successfully and to make use of the innovation potential, manufacturer need the right tool: One development that resulted from a specific application is the special application needle SAN™ TT. “SAN” stands for special application needle and “TT” stands for technical textiles.

The challenge
In case of the production of shoe uppers on flat knitting machines in the field of technical textiles, tight loops with a high course density guarantee dimensional stability of the shoe. Extreme tractive forces are created during the production of these loops, however, which place high demands on the stability of the needle hook. In this application, multi-thread continuous filament yarns are used, which increases the risk of cut filaments. If the yarn is damaged in this way during processing, the surface of the product becomes hairy. The special challenges of this and other applications with comparable requirements therefore include creating a perfect loop structure on the one hand and the durability of the knitted elements on the other.

The solution
Our special application needle SAN™ TT 112.70-62 G 01 in gauge E 7.2 was specifically designed to optimize the production process in these applications. With its narrow latch head, the first version of the new product range is ideal for producing tight loops. The increased hook stability is the answer to the high tractive forces. The adapted spring-loaded latch function and the anti-shear effect guarantee perfect cast-off of the loop and prevent filaments from being cut during the closing action of the latch. This solution concept can be adapted for all the latest flat knitting machine technologies.

The benefit
As a manufacturer, the use of the special application needle SAN™ TT means increased productivity through reduced needle consumption and reduced machine downtimes. The prevention of the shearing effect, the optimized cast-off and the adapted spring-latch function ensure a perfect loop structure.

Example of material damage

On trend: Fine materials
Fashion and clothing made from fine fabrics are currently really on trend. Whether underwear, shirts, blouses, swimwear or sportswear – fabrics are becoming ever finer. For the consumer, the main priority is comfort and functional characteristics like breathability or high elasticity. For the manufacturer, on the other hand, processing these fine materials is a real challenge. This is due to the material damage that frequently occurs during sewing. The most frequent problems are

Example of seam puckering

Material damage and seam puckering
Sewing fine and ultra-fine fabrics is often extremely difficult. As the sewing needle is inserted into the material, the loops or the warp threads and weft yarns often experience significant displacement. With fine fabrics, this can result in loop breaks in extreme cases, particularly when the need
le used is too thick.

Example of skipped stitches

Thread breakage, skipped stitches and needle breakage
To prevent material damage and seam puckering, the needle used should be as thin as possible when sewing fine fabrics. However, if the needle is too thin, thread breakage or skipped stitches may occur. In the worst case scenario, the needle may break due to insufficient stability.

The solution: Special application needle SAN® 10
Groz-Beckert has offered the special application needle SAN® 10 for processing fine knitted and woven fabrics optimally for many years now. The specially designed geometry of this needle means it is both gentle on the material and has sufficient stability.

Its slim design means that it has a smaller displacement cross-section in the eye area. This reduces the stress on the loops or the warp threads and weft yarns when the needle is inserted into the fabric. This protects the material and prevents damage.

Smaller displacement cross-section in the eye area

Even more gentle on the material: The new SAN® 10 XS
Groz-Beckert has re-designed the special application needle SAN® 10 XS to enable optimal sewing of ever finer fabrics. The geometry of the “thinner sister” of the SAN® 10 needle has been optimized and is now even more gentle on the material. In addition to its extremely slim design, it also has a cylindrical blade, which enables the needle to be inserted gently into the material. This helps to prevent or reduce damage even with ultra-fine or difficult to sew fabrics.

However, the extremely slim geometry of the new SAN® 10 XS does have an impact on its stability. This means that there is an increased risk of the needle breaking when using the SAN® 10 XS. So it is only advisable to use the SAN® 10 XS if the top priority is preventing material damage. It is also advisable to always keep the sewing thread as thin as possible when using the SAN® 10 XS.

Related Articles

Stay Connected

11,285FansLike
394FollowersFollow
9,170SubscribersSubscribe

Latest Articles