Thermal comfort properties of single jersey fabrics made from recycled polyester and cotton blended yarns

Thermal comfort properties of single jersey fabrics made from recycled polyester and cotton blended yarns have been studied. Single jerseys knitted fabrics are prepared with different recycled polyester blend ratios, linear density and loop lengths. Box and Behnken, a three level three variable factorial design technique has been used to study the interaction effects of the variables on the characteristics of fabrics. The influence of these variables on thermal comfort properties of fabrics is studied, their response surface equations are derived and design variables are optimized. Fabric becomes thinner, lighter and more porous with the increase in recycled polyester in blend ratio and loop length, whereas thicker, heavier and less porous fabric is resulted with the increase in linear density. Similarly, the increase of linear density results in thicker, heavier and less porous fabric with higher thermal conductivity, lesser air permeability and thermal resistance and high relative water-vapor permeability at medium linear densities. Loose structure results in thinner, lighter and more porous fabric with higher thermal resistance, air permeability and relative water-vapor permeability, and lesser thermal conductivity

Thermal comfort properties of single jersey fabrics made from recycled polyester and cotton blended yarns

318-324Thermal comfort properties of single jersey fabrics made from recycled polyester and cotton blended yarns have been studied. Single jerseys knitted fabrics are prepared with different recycled polyester blend ratios, linear density and loop lengths. Box and Behnken, a three level three variable factorial design technique has been used to study the interaction effects of the variables on the characteristics of fabrics. The influence of these variables on thermal comfort properties of fabrics is studied, their response surface equations are derived and design variables are optimized. Fabric becomes thinner, lighter and more porous with the increase in recycled polyester in blend ratio and loop length, whereas thicker, heavier and less porous fabric is resulted with the increase in linear density. Similarly, the increase of linear density results in thicker, heavier and less porous fabric with higher thermal conductivity, lesser air permeability and thermal resistance and high relative water-vapor permeability at medium linear densities. Loose structure results in thinner, lighter and more porous fabric with higher thermal resistance, air permeability and relative water-vapor permeability, and lesser thermal conductivity

Wpływ proporcji mieszanki na cechy jakościowe przędzy poliestrowo-bawełnianej otrzymanej z recyklingu

This study investigates the effect of the blend ratio on recycled blended yarn quality characteristics. Ring-spun yarns of linear density of 23.6, 29.5 and 39.4 tex were produced from five blend proportions of recycled polyester and cotton (0:100, 33:67, 50:50, 67:33 and 100:0). Increasing the recycled polyester content increases the tenacity, elongation at break and hairiness and decreases unevenness, thin places, thick places and neps, while a decrease in linear density increases the tenacity, elongation at break, unevenness, thin places, thick places, neps and hairiness. Statistical analysis reflects that both the blend ratio and linear density have a significant difference on the tenacity, elongation at break, thin places, thick places, neps and hairiness. However, with reference to unevenness, a significant difference is reported only for linear density and not for the blend ratio. The ratio of recycled polyester has a significant influence on the overall quality of recycled polyester/cotton blended yarn. The blending of recycled polyester and cotton can be optimised to meet various end-use requirements.W pracy zbadano wpływ proporcji mieszanki na cechy jakościowe przędzy poliestrowo- -bawełnianej. Wytworzono przędze o gęstości liniowej 23,6; 29,5 i 39,4 tex, z pięciu proporcji mieszanki poliestru i bawełny poddanych recyklingowi (0: 100, 33:67, 50:50, 67:33 i 100:0). Stwierdzono, że zwiększenie zawartości poliestru powoduje zwiększenie wytrzymałości, wydłużenia i włochatości oraz zmniejszenie nierównomierności, ilości pocienień i defektów przędzy. Obniżenie gęstości liniowej zwiększa wytrzymałość, wydłużenie, nie- równomierność oraz ilość pocienień i włochatość przędzy. Przeprowadzona analiza statystyczna wykazała, że zarówno proporcje mieszanki, jak i gęstość liniowa mają istotny wpływ na wytrzymałość, wydłużenie, nierównomierność i włochatość przędzy

Effect of Blend Ratio on the Quality Characteristics of Recycled Polyester/Cotton Blended Ring Spun Yarn

This study investigates the effect of the blend ratio on recycled blended yarn quality characteristics. Ring-spun yarns of linear density of 23.6, 29.5 and 39.4 tex were produced from five blend proportions of recycled polyester and cotton (0:100, 33:67, 50:50, 67:33 and 100:0). Increasing the recycled polyester content increases the tenacity, elongation at break and hairiness and decreases unevenness, thin places, thick places and neps, while a decrease in linear density increases the tenacity, elongation at break, unevenness, thin places, thick places, neps and hairiness. Statistical analysis reflects that both the blend ratio and linear density have a significant difference on the tenacity, elongation at break, thin places, thick places, neps and hairiness. However, with reference to unevenness, a significant difference is reported only for linear density and not for the blend ratio. The ratio of recycled polyester has a significant influence on the overall quality of recycled polyester/cotton blended yarn. The blending of recycled polyester and cotton can be optimised to meet various end-use requirements.W pracy zbadano wpływ proporcji mieszanki na cechy jakościowe przędzy poliestrowo- -bawełnianej. Wytworzono przędze o gęstości liniowej 23,6; 29,5 i 39,4 tex, z pięciu proporcji mieszanki poliestru i bawełny poddanych recyklingowi (0: 100, 33:67, 50:50, 67:33 i 100:0). Stwierdzono, że zwiększenie zawartości poliestru powoduje zwiększenie wytrzymałości, wydłużenia i włochatości oraz zmniejszenie nierównomierności, ilości pocienień i defektów przędzy. Obniżenie gęstości liniowej zwiększa wytrzymałość, wydłużenie, nie- równomierność oraz ilość pocienień i włochatość przędzy. Przeprowadzona analiza statystyczna wykazała, że zarówno proporcje mieszanki, jak i gęstość liniowa mają istotny wpływ na wytrzymałość, wydłużenie, nierównomierność i włochatość przędzy

SEQUENTIAL MINIMAL OPTIMIZATION IN SUPPORT VECTOR MACHINE

Computer based medical decision support system (MDSS) can be useful for the physicians with its fast and accurate decision making process. Predicting the existence of heart disease accurately, results in saving life of patients followed by proper treatment. The main objective of our paper is to present a MDSS for heart disease classification based on sequential minimal optimization (SMO) technique in support vector machine (SVM). In this we illustrated the UCI machine learning repository data of Cleveland heart disease database; we trained SVM by using SMO technique. Training a SVM requires the solution of a very large QP optimization problem..SMO algorithm breaks this large optimization problem into small sub-problems. Both the training and testing phases give the accuracy on each record. The results proved that the MDSS is able to carry out heart disease diagnosis accurately in fast way and on a large dataset it shown good ability of prediction