An Overview of Fiber Blending
B.Tech, Dept. of Textile Engineering
Giani Zail Singh Punjab Technical University Campus,
Bathinda, Punjab, India
Blending of Fiber:
The basic objective of blending is to give the end-product certain characteristics which are unobtainable from a single fiber component, such as strength, crease resistance, aesthetic effects & price .
The most popular reason for blending is that of combining the properties of two or more fibers . Blending of different fibers is also used to increase aesthetic effects in the fabric .
Polyester/cotton blend is an example, a good end use is in suiting.
Polyester is a man-made fiber with high abrasion resistance and cotton is a natural fiber and has good moisture absorbency & feel .
Wool/ nylon blend is another example, a good end-use is in carpets.
Nylon is a man-made fiber with high abrasion resistance and wool is a natural fiber and is springy and resilient. The nylon improves the abrasion resistance and the wool contributes warmth and resilience.
Blending System :
Various blending systems have been developed for different fibers and different process routes . The systems may be classified into the following groups, depending on the principles involved.
- Stack blending;
- Batch blending;
- Sliver blending
In this method the blend components from the bale or bale breakers ( pre opened ) are weighed and laid down in alternate layers. This stack which is laid horizontally is then withdrawn vertically for feeding.
Fiber batch blending of up to three lots is allowed as long as there is traceability of each fiber batch and the lots are randomly distributed across the prepreg. For prepreg materials used to establish the initial material database, each prepreg batch should contain a single and unique fiber batch.
For the most part, blending of natural and man-made fibers is still carried out in sliver form on the drawframe. This provides the best blend in the longitudinal direction. Up to the drawframe, each raw material can be processed separately on the machines best suited to it.