Production process | Texturisation | Weaving | Assembling | Dyeing | Fixing | Packaging 

Stretching and Texturisation

Stretching is the process in which the raw nylon yarn is stretched and tightened on the bobbins to make it flat and thin-looking.

The next stage is the yarn preparation: texturisation or twisting. The parallel nylon yarns are curled and a strong twisting force is then applied to them, then they are fixed by heat application and released to return to the original twisting status.
The finished product thus acquires elasticity, imperviousness, softness and covering power. Flat yarns have a higher volume and the products made with them are softer and thicker.

In the covering stage the nylon yarn is joined and knotted on the elastomer (Lycra).
There are two covering techniques: air-jet covering and spiral covering.

In air-jet covering the two yarns are conveyed into a room in which compressed air is introduced with non-fixed frequency.
This technique creates products with high volume and elasticity but limited transparency: this technique is used for stretch fibre-like tights, high-denier opaque tights and tights tops.

In spiral covering, on the other hand, nylon is wrapped around Lycra with a spiral.
This technique creates products with a smaller volume and elasticity but with high transparency: this technique is used for voile or stretch tights and stockings.

Depending on the end use (sheer or opaque tights) and on the quality of the product, covering may be either simple with a single yarn (single cover elastomer) or double, with two yarns one wound in clockwise and the other in counter-clockwise directions (double cover elastomer). This technique is used for the leg area and guarantees an evener covering, a more durable yarn, an overall evener final result and a sheer effect.

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