Characterizing the total within-sample variation in cotton fiber length using the High Volume Instrument fibrogram

Abstract

Within-sample variation in cotton fiber length is important when explaining variation in yarn quality. However, typical High Volume Instrument (HVI) length parameters, the Upper Half Mean Length (UHML) and Uniformity Index (UI), do not characterize the total within-sample variation in fiber length. HVI fiber length measurements are based on the fibrogram principle where the HVI generates a curve called a fibrogram and reports the UHML and UI. Our results, based on 19,628 commercial bales, reveal that the typical HVI length measurements do not characterize unique types of length variation. Fibrograms from a subset of 538 commercial samples suggest that the fibrograms capture additional within-sample variation in fiber length that is not being currently reported. Two additional sets of samples were then used to evaluate the importance of this additional length variation. Partial Least Square Regression models and leave-one-out cross-validation reveal that the HVI fibrogram explains yarn quality better than current HVI length parameters and is comparable with the Advanced Fiber Information System (AFIS) length distribution by number. The validation results show that the models built with the HVI fibrogram are better than models with the current HVI length parameters and at least as good as the AFIS length distribution by number when predicting yarn quality. Fiber length variation captured by the whole fibrogram could provide a new tool to breeders for selecting breeding lines and spinners for purchasing cotton bales.

Pesquisa De Fungos Em Lesões De Cascos De Trachemys Sp. Do Biotério Do Centro Universitário Fundação Santo André

“…A qualidade da fibra é aferida mediante a classificação visual e análise laboratorial, mediante o uso do Instrumento de Alto Volume (High Volume Instrument -HVI) e outros complementares (SAYEED et al, 2021). Por meio do HVI são analisadas características da fibra como Resistência (STR), Comprimento (UHML), Micronaire (Finura da fibra), SFI (Índice de fibras curtas), Alongamento (ELG), Maturidade (MR), RD (Refletância/Brilho/grau de cinza), +B (Grau de amarelamento), Thash Folha (Grau de impureza).…”

“…A tecnologia de enfardamento em rolos cilíndricos permite que a colhedora realize uma colheita contínua sem interrupções para descarregamento do algodão colhido. O resultado codificado da análise laboratorial é posteriormente informado na etiqueta do fardo onde consta a sigla HVI (High Volume Instrumentequipamento utilizado para medir as características intrínsecas da fibra do algodão), consoante Sayeed et al (2021). Esse resultado será fundamental no processo de valoração da pluma, bem como no emprego correto pela indústria têxtil, sendo destinada tanto para o mercado interno quanto externo.…”

Operations in the Cotton Chain: A Study at Agro-industrial Cooperative Holambra II and the Paulista Association of Cotton Producers (PACP)

“…The coded result of the laboratory analysis is later reported on the bale label with the acronym HVI (High Volume Instrument -equipment used to measure the intrinsic characteristics of cotton fiber), according to Sayeed, Schumann and Wanjura (2021). This result will be fundamental in the lint valuation process, as well as in the correct use by the textile industry, being destined for both domestic and foreign markets.…”

“…Fiber quality is assessed by visual classification and laboratory analysis using the High-Volume Instrument (HVI) and other complementary instruments (Sayeed, Schumann, & Wanjura, 2021). Through the HVI, fiber characteristics such as Strength (STR), Length (UHML), Micronaire (Fiber fineness), SFI (Short Fiber Index), Elongation (ELG), Maturity (MR), RD (Reflectance/Brightness/Grayness), +B (Yellowing degree), Thash Sheet (Impurity degree) are analyzed.…”

Reconstruction of the cotton fiber length distribution from a High Volume Instrument® fibrogram

“…Recently, there has been some investigation of the fibrogram produced by the HVI to potentially extract additional length parameters. In 2020, Sayeed et al 13 demonstrated that the current UHML and ML are highly correlated with the 1.8% and 7.8% span lengths, respectively (R 2 ¼ 0.99 for both). These two span lengths represent the longest part of the fibrogram, as shown in Figure 2, and were shown to be highly correlated with each other (R 2 ¼ 0.95).…”