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1

Study of Specific Conditions to Control the Mechanical Behaviour of Dorlastan® Core Spun Yarn

Helali H., Babay D. A., Msahli S., Cheikhrouhou M.

Fibres & Textiles in Eastern Europe

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2013

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Vol. 21, no. 3 (99)

55--60

EN

The mechanical properties of yarns play a phenomenal role in the quality of the end product. Studying these properties requires a specific test following international standards. As for elastic core spun yarn, knowledge of the mechanical behaviour is not obvious due to the absence of the specific condition. The aim of this study was to determine appropriate conditions to control the tenacity, elongation at break and elastic recovery of Dorlastan® core spun yarns of different linear densities (counts) (100, 50, 33.33 & 25 tex) and various elastane drafts. The results obtained show that the initial tension necessary to straighten elastic core spun yarns and eliminate their curling increases while the Dorlastan draft increases and, respectively, the Dorlastan ratios decreases. Furthermore we noted a decrease in tenacity and breaking elongation with a decrease in the dorlastan draft and, respectively, with an increase in Dorlastan ratios. On the other hand, we observed the decreasing trend of elastic recovery while the Dorlastan draft increases.

PL

Celem badań było określenie warunków dla kontroli wytrzymałości właściwej, wydłużenia przy zerwaniu, odprężenia elastycznego przędz rdzeniowych typu Dorlastan o różnych masach liniowych (100, 50, 33.33 i 25 tex) i współczynniku rozciągu przędzy elastomerowej. Badania wykazały, że jeżeli naprężenie wstępne wymagane dla wyprostowania elastycznego rdzenia przędzy i eliminacji spętlenia wzrasta kiedy współczynnik rozciągu dla przędz typu Dorlastan wzrasta. Następnie zaobserwowano, zmniejszenie wytrzymałości właściwej i wydłużenia przy zerwaniu ze zmniejszeniem współczynnika rozciągu. Z drugiej strony obserwujemy zmniejszenie tendencji elastycznego odprężenia gdy współczynnik rozciągu wzrasta.

2

The influence of industrial finishing treatments and their succession on the mechanical properties of denim garment

Khedher F., Dhouib S., Msahli S., Sakli F.

Autex Research Journal

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2009

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Vol. 9, no. 3

93--100

EN

The principal aim of this work is to study the effect of matter, types of launderings (stone wash, enzyme wash, mixed wash and rinse), special treatments applied during the manufacturing process of garment washing (brushing, sanding, resin-treatment, bleach-treatment, permanganate-spray and softening) and their succession on the fabric mechanical properties: Tear strength (T. S) and Breaking strength (B. S). The results show that all these treatments, applied to obtain more worn appearance and aged look for garment has decreased the mechanical properties. Moreover , the resin- treatment is the most aggressive for cloths in the set of the special treatments. In fact, whatever the following washing process is stone washing or mixed washing, the finishing resin-treatment destroys the matter and reduces a lot the mechanical resistance. Thus, we proved that in the case of washed denim fabric, it is advisable to avoid the line of succession of treatments containing the resin-treatment and mixed washing process.

3

Study of textile potential of fibres extracted from Tunisian Agave Americana L.

Msahli S., Sakli F.

Autex Research Journal

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2006

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Vol. 6, no. 1

9--13

EN

Agave Americana L. fibres have quite important textile potential. In this paper, we demonstrate this potential by studying the extraction of these fibres from leaves, their physical properties such as fineness, density and their mechanical behaviour in tensile tests. The intrinsic variability of all these properties is also studied, showing natural maturity and ageing of fibres.