Studies on structural and fibre quality characteristics of eri silk cocoons in different seasons and places

Chattopadhyay, Debasis; Chakraborty, Arijit; Chatterjee, Subhrajyoti

doi:10.1080/00405000.2017.1361118

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…In contrast to the present findings, Bhuyan et al (2017) revealed that elongation showed no significant difference in the cocoons from Kesseru fed worms in different seasons. However, Chattopadhyay et al (2018) while studying on the structural and fibre quality characteristics of eri silk cocoons in different seasons and places observed significant influence in case of breaking elongation for all the three factors viz., places, seasons and cocoon layers.…”

Section: Environment Conservation Journalmentioning

confidence: 92%

“…Lower (1988) disclosed that with respect to the seasons, the physical properties of the silk viz., strength and elongation differs. In terms of single fibre denier and tenacity of eri silk, noticeable differences were observed when the silkworms were reared on different seasons (Chattopadhyay et al, 2018). Variation in the yarn quality is greatly influenced by the environmental condition also (Nath et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ailanthus species and seasons on yarn parameters of eri silk

Borah¹,

Saikia²

2022

ECJ

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Present research entails an in-depth analysis on the effect of two secondary host plants of eri silkworm viz., borpat (Ailanthus grandis Prain) and borkesseru (Ailanthus excels Roxb.) and seasons on yarn parameters of eri silk as quality of silk depends on food quality and rearing season. Seasons had significant effect on all the yarn parameters viz., yarn size, breaking load, tenacity and elongation except twist per inch. Significantly the highest yarn size (10.26s) was observed in autumn season which was at par with the spring season. But the maximum breaking load (0.67 kg) and tenacity (1.40 g/denier) were recorded in spring season and elongation (26.54%) in early summer season. Regardless of the seasons, significantly the higher breaking load (0.64 kg) and tenacity (1.51 g/denier) were recorded on the borkesseru leaves. The interaction effect of seasons and two host plants on eri silk yarn was found to be non-significant. Diversiform effect of both the seasons and the host plants pertaining to yarn characters were witnessed. It can be ensured that all the seasons and host plants are relevant with slight alteration in the yarn quality.

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Section: Environment Conservation Journalmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Effect of Ailanthus species and seasons on yarn parameters of eri silk

Borah¹,

Saikia²

2022

ECJ

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“…The average diameter and denier were higher for the brick red variety which was revealed in an earlier study. 34…”

Section: Single Fiber Quality Characteristicsmentioning

confidence: 99%

Influence of fiber length and comber noil extraction in long staple worsted spinning on eri silk yarn quality

Chattopadhyay

Chakraborty

Chatterjee

2022

Textile Research Journal

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The eri cocoons are open mouthed and as their silk filaments are discontinuous, these can only be used for spun yarn production. In this study, the effect of fiber length and comber noil extractions on yarn quality were evaluated. The significant impact of fiber length as well as first and second comber noil extraction was observed on yarn unevenness, imperfections, tenacity, breaking elongation and hairiness. With the aim of minimizing unevenness, imperfections and hairiness along with maximizing tenacity and breaking elongation of yarn; the fiber length and comber noil were optimized using Minitab 19 software. It was revealed that 150 mm fiber length can be set in the staple cutter during spinning preparatory for all yarn counts; 19% and 7% comber noil extractions are required for first and second combing, respectively, to produce 40 and 60 Nm yarns, whereas for 80 Nm yarn about 1% more noil extraction is needed in both combing processes. Principal component analysis depicted that both two comber noil contribute about 57% and fiber length of 43% on yarn quality. Regression equations from the response surface design of the experiment were derived for different yarn quality characteristics which exhibit a difference between actual and predicted values of below 10%.

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“…Its cocooning cycle is generally 15-18 days, only about half of the cocooning cycle of the silkworm, but the volume and mass of the eri silkworm cocoon are 1.8 times and 1.3 times those of the mulberry silkworm cocoon, respectively. [1][2][3] As shown in Figure 1, the eri silkworm cocoon is tapered at both ends, shaped like a jujube kernel and swollen in the middle with unequal sizes on both sides of the waist. Some eri silkworm cocoons are irregularly triangular, each with a closed tail and a small decocooning Natural flat cocoon materials constructed by eri silkworm with high strength and excellent anti-ultraviolet performance hole (eclosion hole) in the head.…”

Section: Introductionmentioning

confidence: 99%

Natural flat cocoon materials constructed by eri silkworm with high strength and excellent anti-ultraviolet performance

Zhou

Wang

Zhou³

et al. 2020

Journal of Engineered Fibers and Fabrics

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Eri silkworm is easy to be raised and has high cocoon yield, the cocoon fails to be continuously reeled due to a loose structure, a large part of cocoon coat and an eclosion hole. In this work, a fifth instar larvae of eri silkworm was provided with only a flat cocooning place to spin to produce a flat cocoon, it was fed with the castor leaves sprayed with nano-TiO2 and graphene oxide (GO), Compared with the flat cocoon obtained without nanomaterials, the silk was not found to change in morphology and structure significantly. Nanomaterials promoted the transformation of the random coil/α-helix conformation of the silk to the β-sheet conformation to a certain extent, which formed a stable crystallization. Thus its strength value could increase by 15%–17%, the ultraviolet protection factor ( UPF) value of the flat cocoon with nanomaterials increased significantly, and the silk obtained made up for the lack of the strength in natural eri silkworm silk and poor resistance to sunlight. The flat cocoon features a stable structure, good formation, uniform thickness, and manual control. It can be directly used as raw material for processing flat textile products, which provides a feasible idea for the high-value utilization of the eri silkworm cocoon.

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Studies on structural and fibre quality characteristics of eri silk cocoons in different seasons and places

Cited by 6 publications

References 2 publications

Effect of Ailanthus species and seasons on yarn parameters of eri silk

Effect of Ailanthus species and seasons on yarn parameters of eri silk

Influence of fiber length and comber noil extraction in long staple worsted spinning on eri silk yarn quality

Natural flat cocoon materials constructed by eri silkworm with high strength and excellent anti-ultraviolet performance

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