High-bulk yarn
As bulk yarn (HB) yarn are yarns referred to high-volume, full-bodied, soft bulkiness. However, they have a relatively low elasticity.
They consist of a mixture of low-shrink and high-shrink fibers with the same chemical constitution as thermoplastic synthetics. After boiling, steaming or dyeing, the non-fixed, yet strongly shrinking type contracts. It migrates into the core of the yarn and causes the entire yarn to bulge, but especially of the fiber portion which is pre-set apart from a residual shrinkage of only 1 to 2 percent.
For such staple fiber bulk yarns , acrylic fibers with a proportion of 40 percent S-type are particularly suitable because of their high modulus of elasticity (600 to 700 kgf / mm²), their advantageous cross-sectional shape and their good stability and dimensional stability. By using the shrink fibers, the yarn count (denier) increases by at least 20 percent compared to the raw yarn .
However, with a lower bulk, shrink bulk yarns made from polyester fibers are also possible.
Bulky yarns are used for the production of light, soft, elastic and warming woven and especially knitted goods for sophisticated outerwear, but also as velor qualities in home textiles.
Individual evidence
- ↑ a b c d Alfons Hofer: Textile and fashion dictionary . 7th edition, Volume 1, Deutscher Fachverlag, Frankfurt am Main 1997, pp. 383–384, keyword “Hochbauschgarn”. ISBN 3-87150-518-8 .
- ↑ Walter Loy: Chemical fibers for technical textile products. 2nd, fundamental revised and expanded edition. Deutscher Fachverlag, Frankfurt am Main 2008, ISBN 978-3-86641-197-5 , p. 52.