Stäubli solutions for technical fabrics
Parallelism for monofilaments

Demanding warp change process
The special characteristics of monofilaments in conjunction with large weaving widths place heavy demands on the warp change process, in which a new warp is laid into the weaving machine and the warp threads tied in to the ends of the woven warp. Of particular importance here is that all tape yarn must be held under uniform tension for automatic tying in. If the yarns cross, they will escape the stretching process and cannot be equalized in length. Non-uniform tension can have serious consequences when producing composite backing material.

The monofilaments of the woven-out warp must also be tied in to those of the new warp with flawless parallelism. This is the only way to ensure that the open fabric texture remains intact, which is critical for optimal properties of dry screening, perfect thermal transmission, and prevention of vapor blisters. Additionally, the fabric texture must not be disturbed by crossed or missing monofilaments, which would detract from the dimensional stability of the textile under high tension.

MAGMA T12 with innovative stretching system
Stäubli’s MAGMA T12 tying machine is ideally suited for these special requirements. It features a patented new stretching system for fast and precise tensioning of tape yarns that ensures parallelism and prevents crossed filaments. Sawtooth-shaped elements integrated into the brush-beam flawlessly engage all threads, so that when the brush-beam is slightly rotated, the entire tape-film layer is stretched. This new feature also drastically cuts preparation time.

The MAGMA T12 easily ties in tape yarn and monofilaments up to 0.5 mm in diameter. And of course, the smooth warp-change process contributes greatly to the high quality of the end product.

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