The effect of blend ratios of unrelaxed and relaxed acrylic fibres on physical properties of high-bulk worsted yarns

Najar, Saeed Shaikhzadeh; Etrati, Seyed Mohammad; Seyed-Esfahani, M H; Hadi, H. Surya

doi:10.1533/joti.2005.0015

Cited by 7 publications

(6 citation statements)

References 2 publications

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“…Bulking process has a reduction effect on yarn tenacity as seen in Figure 3. This reduction could be due to the shrinkable fibre migrate towards the yarn centre and only about 45% of fibres support the tensile forces, the remaining 55% of the non-shrinkable fibres are buckled and appear on the yarn surface and therefore initially remain relatively untensioned [5,24]. Another reason for the lower tenacity of acrylic yarns treated to bulking process may be caused from their lower inter fibre cohesion within their yarn structure.…”

Section: Yarn Propertiesmentioning

confidence: 99%

“…The authors concluded that the increment in the shrinkable fibre blending ratio (up to 40 %) led to increment of yarn shrinkage but led to decrement for tensile strengths. However further increase in shrinkable fibre ratio did not significantly influence the yarn shrinkage values at significance level of 0.05 [5]. Bakhtiari et al also conducted a research related to effect of shrinkable acrylic fibre blend ratios on knitted fabric compression energy (WC) and surface thickness (ΔT).…”

Section: Introductionmentioning

confidence: 99%

“…The second stage of acrylic production includes a series of some processes such as drawing, washing, finishing, drying, and crimping. The crimped tow is later cut to different staple lengths for staple spinning [1,[3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…The yarns' internal structure factors including fibre blend proportions, yarn twist, radial distribution of the two components relative to the yarns axis are influencing factors for the acrylic yarn properties. There are some early studies in the literature related to investigation of acrylic and/or acrylic blend yarn production parameters as well as their effects on yarn and fabric properties [1,5,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. High-bulk acrylic yarns (steamed and dyed) with different shrinkable fibre blending ratios were produced in one of the study where the effect of blending ratios of relax and unrelaxed tows on yarn shrinkage, yarn specific volume and yarn tensile properties were evaluated.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Some Process Parameters on Acrylic Yarns and Knitted Fabrics Made of

Sarioğlu¹,

GÜLTEKİN²,

Günaydin³

2019

J Text Eng

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High bulk acrylic yarns having relax and unrelax fibre blends with varying ratios are commonly used for knitted fabrics. Within acrylic yarn production, bulking process parameters and blending ratio of relax and unrelax acrylic fiber have considerable effect on the desired yarn volume as well as on optimum yarn properties. This study aimed to investigate the effect of ply twist (tpm), bulking temperature (°C) and bulking machine velocity (m/sec) on acrylic yarn properties as well as on supreme knitted fabric properties from those yarns where a constant blend ratio of relax/unrelax acrylic fibre blends were utilized. For this purpose, three different ply twist (185, 215 and 245 tpm) and bulking machine velocity of three levels (550, 650 and 750 m/sec) were selected. Bulking process was achieved at 110 and 130 °C. Tenacity, elongation, crimp contraction and shrinkage properties of untreated acrylic yarns and of acrylic yarns treated with bulking process were evaluated. Additionally, weft knitted fabrics from those yarns were produced at constant production parameters. Bursting strength, air permeability and pilling properties of acrylic knitted fabrics were compared. In order to obtain the optimum ply twist, bulking temperature and bulking machine velocity regarding to desired yarn and fabric properties, numerical optimization method was used at 5% significance level. According to the test results; it was concluded that ply twist, bulking temperature and bulking machine velocity had significant effect on yarn shrinkage. In addition, interaction of ply twist and bulking temperature was found to be an influential factor on bursting strength, bursting distention and air permeability properties. As a consequence, desirability ratio with the value of 57.2% could be provided for the fabrics with the acrylic yarns produced at 185 tpm ply twist with 614 m/sec bulking machine velocity at 130 °C bulking temperature.

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Section: Yarn Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Some Process Parameters on Acrylic Yarns and Knitted Fabrics Made of

Sarioğlu¹,

GÜLTEKİN²,

Günaydin³

2019

J Text Eng

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“…A high bulk polyester filament yarn was developed by fully drawn PET and POY [14]. Maximum yarn bulk, shrinkage and minimum yarn strength of acrylic fibres are obtained at about 40% shrinkable fibre blending ratio [15].…”

Section: Introductionmentioning

confidence: 99%

The Comfort Properties of Two Differential-Shrinkage Polyester Warp Knitted Fabrics

Chen

Miao

Mao

et al. 2016

Autex Research Journal

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Single-layered warp knitted fabrics were produced by the 60D/36F (containing 36 filaments) polyester yarn with differential shrinkage (DS) property in this study. Due to the differential shrinkage property, the fabric becomes curly and bulkier, simulating cotton fabric in terms of its appearance and fabric handle. The performance and appearance of these DS polyester warp knitted fabrics were evaluated objectively and subjectively. The testing results demonstrated that the DS polyester warp knitted fabric had better abrasion property, worse pilling resistance due to the mechanical property of polyester yarn when compared with 100% cotton warp knitted fabric. Meanwhile, lower water vapour permeability and air resistance were found for DS polyester warp knitted fabric resulting from the dense structure of yarn shrinkage after heat-moisture treatment. Besides, the fabric handle was evaluated by Kawabata evaluation system and subject to trial under dry and wet fabric condition. DS polyester warp knitted fabrics provide better recovery under low stress mechanical pressure. The subjective evaluation result shows that the warp knitted fabrics made of DS polyester had similar handle against cotton warp knitted fabric in terms of prickle, smooth, comfort and dry feeling in both dry and wet testing conditions.

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