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Title: Influence of core-sheath ratio and core type on DREF-III friction-spun core yarns
Authors: Chattopadhyay, R
Salhotra, K R
Dhamija, S
Kaushik, R C D
Keywords: Abrasion resistance;Core-spun yarn;DREF-spun yarn;Friction spinning;Polyester/viscose yarn;Sheath-slipping resistance;Yarn twist
Issue Date: Dec-2000
Publisher: NISCAIR-CSIR, India
Abstract: DREF-III friction-spun core yarns have been produced by wrapping a fibrous sheath of viscose rayon fibres around three different polyester cores, viz. fibrous bundle, twisted fibre assembly with Z and S directions, and continuous multifilament yarn, at varying level of core-sheath ratio. It has been observed that the yarn tenacity, breaking extension and the resistance to abrasion increase with the increase in the proportion of core fibres up to 70%, irrespective of the core type, but the sheath-slipping resistance, in general, improves with the increase in sheath content. Further, Z-twisted fibrous core produces strongest yarn with comparable sheath-slipping resistance while the yarns spun with multifilament exhibit highest breaking extension and resistance to abrasion. The introduction of normal parallel fibres as core shows an increased sheath-slipping resistance for DREF-III friction-spun core yarns. Core contents as well as type of core do not show any relationship with yarn unevenness.
Page(s): 256-263
ISSN: 0975-1025 (Online); 0971-0426 (Print)
Appears in Collections:IJFTR Vol.25(4) [December 2000]

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