Retained strength of air-spliced yarn —Rupture process and effect of test length

Abstract

<span style="font-size: 12.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:fd797350-identity-h;="" mso-bidi-language:he"="">Air-spliced yarns have been prepared from carded cotton, combed cotton, polyester-cotton, cotton-acrylic and acrylic hosiery yarns by repeated cutting and splicing of yarns and an attempt has been made to explain the tensile failure process of these spliced yarns. For cotton, acrylic and polyester-cotton blended yarns, the stick-slip rupture is generally observed in

<span style="font-size: 12.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:fd797350-identity-h;="" mso-bidi-language:he"="">spliced zone, whereas it is catastrophic in normal and spliced yams which break in normal zone. The splicing zone of cotton-acrylic blended yam, however, does not exhibit pronounced stick-slip rupture, instead a long creep or plastically deformable region is observed when the spliced retained strength (SRS) is higher. The study has been extended to understand the effect of yarn test length on spliced retained strength and it is found that with higher test length(50 cm) the SRS is higher than that with lower test length (16 cm) when the splicing position is kept in the middle of the test length during tensile testing.

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