Effects of Vacuum Steaming Process on the Twist Liveliness of Staple Yarns

• Autorzy: Sardag S. , Özdemir Ö.

Warianty tytułu

PL

Wpływ procesu parowania próżniowego na stabilizację skrętu przędz odcinkowych

• Języki publikacji: EN

Abstrakty

EN

During yarn formation by spinning, fibres are bent into approximately helical shapes and tension is created. Twisted yarns tend to untwist because of this tension. When twisted yarn tension is slackened, the yarns usually get coupled as loops and twisted in the reverse direction forming snarls. This situation is called the twist liveliness of the yarn. Yarn twist liveliness properties should be taken into account during the manufacturing process, and necessary precautions should be taken in order to avoid or minimise problems likely to occur during the subsequent processes. Today setting yarn twists on vacuum steaming machines is the most widely used method of decreasing twist liveliness values of yarns.In this study, the effects of vacuum steaming processes and other parameters on the twist liveliness of 100% cotton, 100% viscose and 100% polyester yarns were investigated. For this purpose, yarns with different twisting coefficients and numbers were twisted and subjected to vacuum steaming at different temperatures and for different durations according to their raw material properties. Twist liveliness values of these yarns were measured before and after vacuum steaming and the results obtained were assessed by means of SPSS statistics software. Variation analyses and SNK (Student Newman Keuls Tests) tests were carried out at a 5% (0.05) level of significance. As a result of this study, it can be concluded that the vacuum steaming temperature, raw material, the amount of twist, and yarn number have a significant effect on twist liveliness values of yarns.

PL

Podczas formowania przędz włókna zginane są spiralnie, w wyniku czego powstaje naprężenie, pod wpływem którego skręcone włókna maja tendencje do rozkręcania się. Przy zmniejszaniu naprężenia, przędze zazwyczaj tworzą pętle i skręcają w przeciwnych kierunkach formując supły. Takie zjawisko nazywane jest stabilizacja skrętu przędzy. Właściwości tego zjawiska powinny być brane pod uwagę podczas procesu produkcji, oraz powinny zostać podjęte niezbędne środki ostrożności w celu uniknięcia lub zminimalizowania problemów, które mogą wystąpić w dalszych procesach. Obecnie dla zmniejszenia tego zjawiska stosuje się ustawienie skrętów przędzy na próżniowych maszynach parowych. W pracy badano skutki próżniowych procesów parowania i innych parametrów na stabilizację skrętu 100% bawełny, 100% wiskozy i 100% włókien poliestrowych. W tym celu, przędze o różnym współczynniku skrętu i masie liniowej były skręcane i poddawane parowaniu przy obniżonym ciśnieniu i przy różnych wartościach temperatury, i w różnym czasie parowania w zależności od właściwości surowca.

Słowa kluczowe

EN

vacuum steaming; twist; twist liveliness; Kr value; yarn

PL

parowanie próżniowe; skręt; stabilizacja skrętu; wartość Kr; przędza

• Wydawca: Sieć Badawcza Łukasiewicz - Łódzki Instytut Technologiczny
• Czasopismo: Fibres & Textiles in Eastern Europe
• Rocznik: 2013
• Tom: Vol. 21, no. 5 (101)
• Strony: 49--53
• Opis fizyczny: Bibliogr. 34 poz., rys., tab.

Twórcy

autor

Sardag S.

• Department of Textile Engineering, Faculty of Engineering & Architecture, University of Uludag, Bursa, Turkey

autor

Özdemir Ö.

• Department of Textile Engineering, Faculty of Engineering & Architecture, University of Uludag, Bursa, Turkey

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