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Title: Impacts of yarn twist and staple length on UV protection of plain-knitted cotton fabrics
Authors: Wong, WY
Lam, J
Kan, CW 
Postle, R
Keywords: Yarn twist
Staple length
Ultraviolet protection
Plain-knitted fabric
Issue Date: 2016
Publisher: Routledge, Taylor & Francis Group
Source: Journal of the Textile Institute, 2016, v. 107, no. 12, p. 1533-1542 How to cite?
Journal: Journal of the Textile Institute 
Abstract: Yarn construction is an important attribute in knitting and end use performance of knitwear. Holistically, yarn construction affects fabric thickness and weight, and thereby influences ultraviolet (UV) protection of fabrics. Although impact of yarn construction on UV protection of fabrics is apparent, there appears to be limited research on it. This paper studied the UV protection of plain-knitted fabrics made of three types of ring-spun cotton yarns varying in yarn twist level and staple length. The results show that these yarn properties affect UV protection of fabrics differently before and after laundering. The modified low-twisted yarn possesses a bulky feature which creates a porous fabric structure for more ultraviolet radiation (UVR) transmission. The extra-long staple yarn offers uniform fabric appearance for higher UVR reflection. However, the regularity of yarn also restricts the fabric shrinkage in laundering and thus improvement in UV protection by shrinkage is not as obvious as that provided by the conventional short-staple yarn.
ISSN: 0040-5000
EISSN: 1754-2340
DOI: 10.1080/00405000.2015.1128733
Appears in Collections:Journal/Magazine Article

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