Relationship between sugar properties and stickiness measurements

Héquet Eric, Abidi Nouredine, Watson Mike. 2001. Relationship between sugar properties and stickiness measurements. In : Amélioration de la commercialisation du coton produit dans les zones affectées par le collage : actes du séminaire, Lille, France, 4-7 juillet 2001. Gourlot Jean-Paul (ed.), Frydrych Richard (ed.). CFC, CIRAD-CA-COTON, IFTH, SCC, ARC. Amsterdam : CFC, 120-131. Séminaire sur l'amélioration de la commercialisation du coton produit dans les zones affectées par le collage, Lille, France, 4 Juillet 2001/7 Juillet 2001.

Résumé : Cotton contaminated with excessive amounts of sugars causes serious problems in spinning mills. During the yarn manufacturing process, the machinery is contaminated to different degrees depending on the processing stage. The contaminants are mainly sugar deposits produced either by physiological or entomological sugars. It was shown that among the sugar present on the contaminated cotton, only trehalulose accumulated on the textile equipment. The accumulation of trehalulose could be related to the changes in the properties of sugars during fiber processing because of the increase of the temperature due to the frictional forces involved in the textile processing. The thermal properties of individual sugar present on contaminated cotton show that trehalulose has the lowest melting point, being around 48°C. In addition, hydration kinetic of trehalulose is very fast, All the indications gathered show that the accumulation of trehalulose is due to its low melting point and highly hygroscopic character. Therefore, humidity and temperature would have an effect on stickiness measurements. One hundred and fifty cotton bales representing a wide range of stickiness and different types of contamination were selected and tested on the H2SD under different conditions. The results obtained demonstrate that by testing at lower relative humidity (55% RH instead of 65% RH), the H2SD readings were significantly lower, 23.2% in average (on the square root transformed data). By testing at high temperature, nearly all the contaminated cottons become sticky, even the one having liftle-to-no trehalulose. At low temperature, only the cotton having significant amount of trehalulose were sticky. This shows that the H2SD principle needs to be revisited.

Mots-clés Agrovoc : coton, contamination, défaut, qualité technologique, matériel, sucres, propriété physicochimique

Mots-clés complémentaires : Collage, Filature, Coton collant

Classification Agris : Q60 - Traitement des produits agricoles non alimentaires

Auteurs et affiliations

• Héquet Eric, International Textile Center (USA)
• Abidi Nouredine, International Textile Center (USA)
• Watson Mike, Cotton Incorporated (USA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/489459/)

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