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Mukhopadhyay A - One of the best experts on this subject based on the ideXlab platform.
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Blend irregularity and migratory behaviour of blend constituents in AJS polyester-viscose Yarns
NISCAIR-CSIR India, 1999Co-Authors: Punj S K, Mukhopadhyay AAbstract:247-252Image analyzer has been used to study the effect of blend percentage on blend irregularity both in the cross -section and on the surface of polyester- viscose blended Air-Jet Spun Yarn. This method is rapid and precise enough to determine zone wise number distribution of the blend constituents in Yarn cross-section. Within and between zone variance and index of blend irregularity values are derived which reflect the extent of blend irregularity for blowroom and drawframe blended Yarns. The above parameters are minimum for polyester-viscose (67:33) blowroom blended Yarns and higher for extreme blends. Migratory behaviour of polyester and viscose fibres with the change in blend proportion has also been studied using tracer fibres. Migratory behaviour of fibers is found to get influenced by blend proportion apart from the intrinsic characteristics of fibres. In the blended Yarns, viscose component migrates from core to surface. Polyester-rich blended Yarn possesses maximum wraps/mm and cork-screw type of structure
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Effect of various softeners on the performance of polyester-viscose ring and Air-Jet Spun Yarn fabrics
NISCAIR-CSIR India, 1998Co-Authors: Sharma I C, Mukhopadhyay A, Chatterjee K N, Chattopadhyay D P, Kumar AAbstract:44-48The effects of various softeners, viz. cellulase enzyme, caustic soda, a combination of cellulase enzyme and caustic soda, and non-ionic softener on the performance of twill fabrics made from polyester-viscose ring and Air-Jet Spun Yarns have been investigated in terms of flexural rigidity, tensile strength and crease recovery. The influence of pick density on the above properties has also been studied. It is observed that crease recovery and flexural rigidity improve considerably for the fabrics treated with cellulase enzyme followed by caustic soda, reasonably for the fabrics treated individually with the cellulase enzyme and caustic soda and marginally for the fabrics treated with non-ionic softener. On the other hand, the fabric strength is affected in all the above cases to a small extent. The effect of chemical treatment is greater on the mechanical properties of Air-Jet Spun Yarn fabrics. With varying pick density, the response of Air-Jet Yarn fabrics to chemical agents is different than that of ring Yarn fabrics. Improvement increase recovery and flexural rigidity is greater for Air-Jet Yarn fabrics at the cost of reduced tensile strength.
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Effect of extension rate and gauge length on tensile behaviour of ring and Air-Jet Spun Yarns
NISCAIR-CSIR India, 1998Co-Authors: Punj S K, Mukhopadhyay A, Chakraborty AAbstract:19-24A comparison of the Yarns Spun on MJS and ring spinning system shows that both the tenacity and breaking elongation are higher for ring-Spun Yarn at all extension rates and gauge lengths. With the increase of polyester fibre content in blend, tenacity and breaking elongation increase with greater impact on Air-Jet Spun Yarn in majority of the cases. With the increase in extension rate, tenacity increases up to a certain limit beyond which a further increase in extension rate causes drop in tenacity. In short gauge lengths, the maximum tenacity is obtained at lower rate of extension than is tenable from the long gauge lengths. At very long gauge length (500 mm), the tenacity of Air-Jet Yarn shows no decrease with the increase in extension rate. As the gauge length becomes shorter the tenacity and breaking elongation increase for both types of Yarn. The effect of change in extension rate and gauge length is more pronounced on Air-Jet Yarn than ring-Spun Yarn and the F-ratio values on tenacity also reflect this. Breaking elongation increases with corresponding increase in extension rate and decrease in gauge length with some exception. Although the F-ratio values for breaking elongation show that the effects of change in these parameters are very much significant, no specific trend is obtained.
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A comparative study of ring and Air-Jet Spun Yarn fabrics in grey and finished state
NISCAIR-CSIR India, 1997Co-Authors: Sharma I C, Mukhopadhyay A, Chatterjee K N, Chattopadhyay D P, Kumar AAbstract:176-183The effects of finishing treatments and constructional parameters such as pick density and weave on the appearance (crease recovery and pilling propensity), handle (drapability and flexural rigidity) and durability (tensile strength) of ring-Spun and Air-Jet Spun Yarn fabrics have been studied. It is observed that after processing, pilling propensity, flexural rigidity, crease recovery, drape and tensile strength of the fabrics improve considerably. For similar pick density the plain woven fabrics have higher pilling resistance and breaking strength but exhibit lower crease recovery and flexibility than twill and satin fabrics.
Punj S K - One of the best experts on this subject based on the ideXlab platform.
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Influence of material parameters and thermal treatment on structure and properties of polyester Air-Jet Spun Yarn
'CSIRO Publishing', 2007Co-Authors: Mahish, Sudipta S, Punj S K, Singh GagandeepAbstract:150-157The effect of thermal treatment (dry and wet) under slack conditions, blend ratio and fibre cross-section on the structure and properties of Air-Jet Spun Yarns has been studied. It is observed that the thermal treatment, particularly in wet condition, increases the linear density, helix angle, helix diameter, breaking extension and abrasion resistance and decreases the mean fibre extent, tenacity and flexural rigidity of the Yarns. The increase in amount of coarser denier fibre exhibits higher helix diameter, mean fibre extent, Yarn tenacity, breaking extension, abrasion resistance and flexural rigidity, and lower helix angle. The increase in trilobal fibre content in the blend shows increased helix diameter and mean fibre extent, and lower helix angle, Yarn tenacity, breaking extension, abrasion resistance and flexural rigidity in the Yarn
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Blend irregularity and migratory behaviour of blend constituents in AJS polyester-viscose Yarns
NISCAIR-CSIR India, 1999Co-Authors: Punj S K, Mukhopadhyay AAbstract:247-252Image analyzer has been used to study the effect of blend percentage on blend irregularity both in the cross -section and on the surface of polyester- viscose blended Air-Jet Spun Yarn. This method is rapid and precise enough to determine zone wise number distribution of the blend constituents in Yarn cross-section. Within and between zone variance and index of blend irregularity values are derived which reflect the extent of blend irregularity for blowroom and drawframe blended Yarns. The above parameters are minimum for polyester-viscose (67:33) blowroom blended Yarns and higher for extreme blends. Migratory behaviour of polyester and viscose fibres with the change in blend proportion has also been studied using tracer fibres. Migratory behaviour of fibers is found to get influenced by blend proportion apart from the intrinsic characteristics of fibres. In the blended Yarns, viscose component migrates from core to surface. Polyester-rich blended Yarn possesses maximum wraps/mm and cork-screw type of structure
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Effect of some machine variables on structure and properties of polyester-viscose Air-Jet Spun Yarn
NISCAIR-CSIR India, 1998Co-Authors: Punj S K, Moitra Koushik, Behera B KAbstract:85-93The effects of second jet pressure, spinning speed and condenser width on the structure and properties of polyester-viscose blended jet-Spun Yarn have been studied. Tracer fibre technique has been used for the structural analysis of the Yarn and the Yarn properties such as tenacity, CSP, flexural rigidity, hairiness, unevenness and imperfections have been determined and explained in the light of structural parameters. Increase in wraps/mm has been observed with the increase in both jet pressure and Spinning speed. Increase in jet pressure increases Yarn tenacity and flexural rigidity but decreases Yarn hairiness. Maximum Yarn tenacity is obtained at 180m/min spinning speed and at comparatively high second jet pressure(4 kg/cm2). Increase in spinning speed increases U%, imperfections and hairiness.
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Effect of extension rate and gauge length on tensile behaviour of ring and Air-Jet Spun Yarns
NISCAIR-CSIR India, 1998Co-Authors: Punj S K, Mukhopadhyay A, Chakraborty AAbstract:19-24A comparison of the Yarns Spun on MJS and ring spinning system shows that both the tenacity and breaking elongation are higher for ring-Spun Yarn at all extension rates and gauge lengths. With the increase of polyester fibre content in blend, tenacity and breaking elongation increase with greater impact on Air-Jet Spun Yarn in majority of the cases. With the increase in extension rate, tenacity increases up to a certain limit beyond which a further increase in extension rate causes drop in tenacity. In short gauge lengths, the maximum tenacity is obtained at lower rate of extension than is tenable from the long gauge lengths. At very long gauge length (500 mm), the tenacity of Air-Jet Yarn shows no decrease with the increase in extension rate. As the gauge length becomes shorter the tenacity and breaking elongation increase for both types of Yarn. The effect of change in extension rate and gauge length is more pronounced on Air-Jet Yarn than ring-Spun Yarn and the F-ratio values on tenacity also reflect this. Breaking elongation increases with corresponding increase in extension rate and decrease in gauge length with some exception. Although the F-ratio values for breaking elongation show that the effects of change in these parameters are very much significant, no specific trend is obtained.
Kumar A - One of the best experts on this subject based on the ideXlab platform.
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Effect of various softeners on the performance of polyester-viscose ring and Air-Jet Spun Yarn fabrics
NISCAIR-CSIR India, 1998Co-Authors: Sharma I C, Mukhopadhyay A, Chatterjee K N, Chattopadhyay D P, Kumar AAbstract:44-48The effects of various softeners, viz. cellulase enzyme, caustic soda, a combination of cellulase enzyme and caustic soda, and non-ionic softener on the performance of twill fabrics made from polyester-viscose ring and Air-Jet Spun Yarns have been investigated in terms of flexural rigidity, tensile strength and crease recovery. The influence of pick density on the above properties has also been studied. It is observed that crease recovery and flexural rigidity improve considerably for the fabrics treated with cellulase enzyme followed by caustic soda, reasonably for the fabrics treated individually with the cellulase enzyme and caustic soda and marginally for the fabrics treated with non-ionic softener. On the other hand, the fabric strength is affected in all the above cases to a small extent. The effect of chemical treatment is greater on the mechanical properties of Air-Jet Spun Yarn fabrics. With varying pick density, the response of Air-Jet Yarn fabrics to chemical agents is different than that of ring Yarn fabrics. Improvement increase recovery and flexural rigidity is greater for Air-Jet Yarn fabrics at the cost of reduced tensile strength.
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A comparative study of ring and Air-Jet Spun Yarn fabrics in grey and finished state
NISCAIR-CSIR India, 1997Co-Authors: Sharma I C, Mukhopadhyay A, Chatterjee K N, Chattopadhyay D P, Kumar AAbstract:176-183The effects of finishing treatments and constructional parameters such as pick density and weave on the appearance (crease recovery and pilling propensity), handle (drapability and flexural rigidity) and durability (tensile strength) of ring-Spun and Air-Jet Spun Yarn fabrics have been studied. It is observed that after processing, pilling propensity, flexural rigidity, crease recovery, drape and tensile strength of the fabrics improve considerably. For similar pick density the plain woven fabrics have higher pilling resistance and breaking strength but exhibit lower crease recovery and flexibility than twill and satin fabrics.
Sharma I C - One of the best experts on this subject based on the ideXlab platform.
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Effect of various softeners on the performance of polyester-viscose ring and Air-Jet Spun Yarn fabrics
NISCAIR-CSIR India, 1998Co-Authors: Sharma I C, Mukhopadhyay A, Chatterjee K N, Chattopadhyay D P, Kumar AAbstract:44-48The effects of various softeners, viz. cellulase enzyme, caustic soda, a combination of cellulase enzyme and caustic soda, and non-ionic softener on the performance of twill fabrics made from polyester-viscose ring and Air-Jet Spun Yarns have been investigated in terms of flexural rigidity, tensile strength and crease recovery. The influence of pick density on the above properties has also been studied. It is observed that crease recovery and flexural rigidity improve considerably for the fabrics treated with cellulase enzyme followed by caustic soda, reasonably for the fabrics treated individually with the cellulase enzyme and caustic soda and marginally for the fabrics treated with non-ionic softener. On the other hand, the fabric strength is affected in all the above cases to a small extent. The effect of chemical treatment is greater on the mechanical properties of Air-Jet Spun Yarn fabrics. With varying pick density, the response of Air-Jet Yarn fabrics to chemical agents is different than that of ring Yarn fabrics. Improvement increase recovery and flexural rigidity is greater for Air-Jet Yarn fabrics at the cost of reduced tensile strength.
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A comparative study of ring and Air-Jet Spun Yarn fabrics in grey and finished state
NISCAIR-CSIR India, 1997Co-Authors: Sharma I C, Mukhopadhyay A, Chatterjee K N, Chattopadhyay D P, Kumar AAbstract:176-183The effects of finishing treatments and constructional parameters such as pick density and weave on the appearance (crease recovery and pilling propensity), handle (drapability and flexural rigidity) and durability (tensile strength) of ring-Spun and Air-Jet Spun Yarn fabrics have been studied. It is observed that after processing, pilling propensity, flexural rigidity, crease recovery, drape and tensile strength of the fabrics improve considerably. For similar pick density the plain woven fabrics have higher pilling resistance and breaking strength but exhibit lower crease recovery and flexibility than twill and satin fabrics.
Gora Iveković - One of the best experts on this subject based on the ideXlab platform.
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Study on Physical-mechanical Parameters of Ring-, Rotor- and Air-Jet-Spun Modal and Micro Modal Yarns
University of Ljubljana Faculty for Natural Sciences and Engineering, 2019Co-Authors: Zenu Skenderi, Dragana Kopita, Sanja Ercegović Ražić, Gora IvekovićAbstract:The main physical-mechanical parameters of modal Yarns (unevenness, faults, hairiness and spectrograms) were compared with the parameters of micro modal Yarns of the same fineness and end-use. The difference in tenacity and elongation at break of different types of modal and micro modal-Spun Yarns is determined by Yarn structure. The highest tenacity was achieved in the oriented structure of ring-Spun Yarn, followed by Air-Jet-Spun and rotor-Spun Yarn, in the case of both modal and micro modal fibres. All types of modal Yarns differ in overall unevenness and in terms of micro modal fibres. The values of the overall unevenness of ring-, rotor- and Air-Jet-Spun modal Yarns are greater than or equal to the same values of micro modal Yarns. The spinning technique, and thus the Yarn structure, determine the level of overall Yarn evenness. The number of faults at different levels of sensitivity measurement to detect the highest number of thin and thick places and neps (–30%, +35% and +140%) is greater in rotor- and Air-Jet-Spun Yarn than in ring-Spun Yarn for both levels of fibre fineness. Periodic faults of short wavelengths with significant amplitude increase the number of Yarn faults to a certain extent. Rotor-Spun micro modal Yarn shows the highest deviation from ideal unevenness, while ring-Spun modal Yarn shows the lowest deviation. Yarn hairiness depends on the spinning technique. Finer fibres cause lower hairiness in all Yarn types
