Permaset VMT

Stenter control made easy

Without knowledge of what’s happening during a fixing, thermo-isolating, condensing or gelling process in the drying chambers, the stenter has to be looked at like a block box. The user had only his own experience to fall back on. Settings for circulation temperature and stenter speed have to be determined empirically. To ensure adequate process reliability most stenters are operated with large safety margins regarding possible speeds. They are therefore far away from optimal utilisation of machine capacity and energy invested.

In many processes knowledge of what happens in the stenter is not only an economic question. The achievable product quality also depends largely on the suitable temperature and dwell time.

With thermo-fixing of textiles with Lycra portions excessive product temperatures may, for example, cause the Lycra portion to loose elasticity. This would mean significant quality reduction.

To ensure repeatable processes, the use of appropriate measuring equipment in the drier chambers is essential.