Showing papers in "Fibres & Textiles in Eastern Europe in 2015"

New Approach for Dyeing and UV Protection Properties of Cotton Fabric Using Natural Dye Extracted from Henna Leaves

Abstract: *Corresponding author: E-mail: tzhao@dhu.edu.cn Abstract A new approach for the dyeing and UV protection of cotton fabric using Henna extract was investigated. In this study, 3-chloro-2-hydroxy propyl, trimethylammonium chloride was used to substitute metallic mordants (heavy-metal salts) in the pre-treatment of cotton fabric. This will eventually prevent heavy metal pollution as well as facilitate dyeing without the addition of salt. Cationised cotton fabrics were dyed with Henna extract at different dyeing temperatures for different dyeing times. Colour strength, fastness properties (washing, rubbing and light), UV-blocking and tensile strength were investigated. Cationised fabric dyed with Henna extract exhibited outstanding enhancement in UV protection with minimal impact on the tensile strength. Enhancement or decrement in UV protection and colour strength was found to be governed by the dyeing temperature and dyeing time.

Material Characterization of Roselle Fibre (Hibiscus sabdariffa L.) as Potential Reinforcement Material for Polymer Composites

Abstract: Recently,in line with rising environmental concerns,n researchers are now replacing synthetic fibres with natural ones as the main component in composites.Natural fibres are preferred to synthetic fibres because of several advantages such as biodegradable,light weight, low cost and good mechanical properties.Roselle is one of the plants found to be suitable to be used to produce natural fibres.In this work,we analysed the physical, thermal and mechanical characteristics of roselle fibre. Roselle fibre has good physical properties which lead to the dimensional stability of the composite product.The result obtained indicated that the moisture content of roselle fibre is 10.9%,while water absorption is 286.5%. Thermal gravimetric analysis (TGA) was conducted to understand the thermal stability of roselle fibre at high temperature.The results show that the initial degradation of roselle fibre starts at 225 °C and completes the decomposition of the lignocellulosic component at 400 4C. A tensile test was conducted to investigate the mechanical properties of roselle fibre.The tensile strength of roselle fibre is 130 - 562 MPa.On the basis of the properties of roselle fibres obtained,we concluded that roselle fibre is one of the good natural fibres that can be used as reinforced material for the manufacturing of polymer composites for different applications,while at the same time saving the cost required to manage the agro waste.

Assessment of Eco-Friendly Natural Antimicrobial Textile Finish Extracted from Aloe Vera and Neem Plants

Abstract: *Faculty of Pharmacy, Bahauddin Zakariya University, 60800 Multan, Pakistan E-mail: engr.furqan@bzu.edu.pk Abstract The aim of the present work was to assess an eco friendly natural antimicrobial textile finish extracted from Aloe gel and Neem plants. Extracted Aloe gel and active substance of Neem were mixed in a mordant to form a finish. Bleached cotton samples were treated with 5, 7, and 10% concentrations of Aloe gel and Neem separately. The same samples were then treated with a hybrid combination of Aloe gel and Neem (HCAN) extracts having 5, 7 and 10% concentrations. These finished samples were subjected to an antibacterial activity test against E. coli and S. aureus, an antifungal activity test against Aspergillus Niger, and a test of their durability of antibacterial finish fastness to washing by standard test methods. It was found that the hybrid combination of Aloe gel and Neem (HCAN) was an effective antibacterial and antifungal agent as compared to Aloe gel and Neem separately. It also showed good durability to washing.

Formation and Analysis of Electrospun Nonwoven Mats from Bicomponent PVA/Aqueous Propolis Nano-Microfibres

Abstract: Adomavičiūtė E, Stanys S, Žilius M, Briedis V. Formation and Analysis of Electrospun Nonwoven Mats from Bicomponent PVA/Aqueous Propolis Nano-Microfibres. FIBRES & TEXTILES in Eastern Europe 2015; 23, 5(113): 35-41. DOI: 10.5604/12303666.1161754 Formation and Analysis of Electrospun Nonwoven Mats from Bicomponent PVA/Aqueous Propolis Nano-Microfibres Erika Adomavičiūtė, Sigitas Stanys, *Modestas Žilius, *Vitalis Briedis

Enhancing the Thermal Protective Performance of Firefighters' Protective Fabrics by Incorporating Phase Change Materials

Abstract: A composite fabric consisting of an outer shell, moisture barrier, thermal liner and comfort layer used for firefighters’ protective clothing, was incorporated with shape-stabilised phase change material (PCM) powder in order to improve the thermal protection capability provided by thermal protective clothing. Then we conducted a series of FTP (fire test ing protection) experiments to investigate the effects of PCM location and phase change temperature on the heat protection efficiency of firefighters’ protective fabrics (FFPFs). Simultaneously the thermoregulation performance of the composite fabrics with PCMs was evaluated by using step-cooling experimental technology during the cooling process. Data from the FTP tests were also compared with those from the existing enthalpy formulation model of heat transfer through FFPFs embedded with PCMs. It was concluded that the use of PCMs could improve the heat buffering capacity. However, as PCM has a moderate melting temperature, it is better than the other two samples because they have a lower and higher melting temperature. Therefore PX 52 PCMs (melting temperature: 47 - 53 °C) could provide the maximum heat protection time compared with the other two kinds of PCMs.

Impact of Male Body Posture and Shape on Design and Garment Fit

Abstract: This paper presents a study of the impact of body posture and the presence of functional and structural body changes on garment fit. 3D scanning on a sample of 50 male test sub jects was performed. Body posture indicators were determined on 3D body models and a statistical analysis of the results obtained was performed. Test subjects from the sample were divided into three groups according to body posture types. Three body models with different body dimensions and different physiological spine curvature were selected and im ported into a 2D/3D CAD system for computer-based garment simulation. 3D simulation of a men’s jacket in the closest garment size was performed on selected body models. Garment fit was analysed on every simulated model and based on the analysis performed, garment pattern elements and measurements where it is necessary to enable modifications were de termined. The most complex part of the research refers to the development of a parametric computer-based garment model which will be able to adjust according to anthropometric body measurements and body shapes with a different physiological spine curvature. Relationships between targeted body measurements and their impact on modifications of pattern segments were investigated as a starting point for defining mathematical expres sions according to which values of measurement changes on the garment pattern will be calculated. A parametric garment model pattern which enables adjustments according to different body sizes and body postures types was developed. Verification of the method developed was performed using computer-based 3D simulations on 3D body models with prominent problems of body posture.

Preparation of Microencapsulated Phase Change Materials by the Sol-gel Process and Its Application on Textiles

Abstract: A kind of microencapsulated phase change materials (PCMs) based on a paraffin core and inorganic silica shell was designed to enhance thermal conductivity and phase change performance. These silica microcapsules were synthesised by using tetraethoxysilane (TEOS) as an inorganic source through the sol-gel process. Scanning electronic microscopy images suggested that the silica microcapsules exhibited a spherical morphology with a welldefined core-shell microstructure. The particle size and distribution showed the microcap sules were uniform and dispersed evenly. It was confirmed by Fourier transform infrared spectra that the silica shell material was successfully fabricated onto the surface of the paraffin core. The DSC curve illustrated that the microcapsules with a silica shell had a higher melting temperature and enthalpy. The thermo-regulating properties of the coated fabric changed with the microcapsule weight added.

Morphology and Electromagnetic Shielding Effectiveness of PP Nonwovens Modified with Metallic Layers

Abstract: Polypropylene (PP) nonwoven was used as a substrate for CuSn and CuZnNi deposited layers. Nonwoven metallization was carried out using the DC magnetron sputtering process at various process parameters (e.g. effective power dissipated in the target, velocity of the substrate drift, number of cycles). The studies aimed at defining the surface morphol ogy of PP nonwoven modified by metallic deposition, the crystallographic structure of the thin metallic layers and the effect of the layers’ crystallinity on the electromagnetic (EM) shielding effectiveness of the two-component metal/PP composites. The morphology studies were covered by scanning electron microscopy. Furthermore the crystalline character of components CuSn and CuZnNi was examined in grazing-incidence angle X-ray diffraction experiments. It was found that CuSn/PP composites with a crystalline structure of the metallic layer exhibit the highest values of shielding effectiveness (44-45 dB at 27,12 MHz and 38-39 dB at 1795 MHz).

Bio-innovation in Cotton Fabric Scouring - Acid and Neutral Pectinases

Abstract: Using biotechnology during textile processing has been known for years due to its environmental benefits and special performance of enzymes in comparison with the conventional processing of textiles. This paper deals with the bioscouring of cotton fabric with acid and neutral pectinases in comparison with alkali scouring. Variations in technological procedures, as expressed through pad-roll and exhaustion, were also identified for the bioscouring of cotton fabrics. The varied impacts of alkali, acid, and neutral pectinases on the properties of cotton fabrics throughout the processing technology were evaluated for electrokinetic phenomena, hydrophilicity, mechanical and chemical degradation, inorganic residues, and whiteness.

Influence of Fibre Arrangement on the Buckling Load of Composite Plates - Analytical Solution

Abstract: This paper deals with the problem of the influence of the angular arrangement of laminas on the buckling force of rectangular composite plates. The article presents a general, simple analytical method of buckling load determination and finding the best arrangement in terms of the highest stiffness in the prebuckling state. Some special characteristic cases of arrangements in an eight layered GFRP laminate are assumed, and buckling force as a function of the arrangement is investigated by finding proper maxima. Results for some characteristic lay-ups are compared with FEM and results found in literature.

Real-Time Denim Fabric Inspection Using Image Analysis

Abstract: In spite of using modern weaving technology, many types of fabric defects occur during production. Most defects arising in the production process of a fabric are still detected by human inspection. A machine vision system that can be adapted to different types of fabric inspection machines is proposed in this study. Image frames of denim fabric were acquired using a CCD line-scan camera. An algorithm was developed by using the Gabor filter and double thresholding methods. The performance of the algorithm was tested real-time by analysing a denim fabric sample which contained six types of defects: hole, warp lacking, weft lacking, soiled yarn, water soil and yarn flow (knot). The defective regions of the denim fabric sample were detected and labelled successfully.

Measuring Thread Densities of Woven Fabric Using the Fourier Transform

Abstract: Dandan Zhu Abstracttime-consuming and lab-intensive of manual inspection, a Fourier transform is proposed to detect the thread densities of woven fabric in this paper. First, theories of the Fourier transform, yarn image reconstruction and the threshold method are introduced. Then the steps of fabric image acquisition, the Fourier transform of the fabric image, feature analysis in the frequency domain, image construction of fabric yarns, and threshold processing are analysed. Lastly, after locating and counting the yarns in the fabric segmentation results, thread densities of the woven fabric are calculated. The experimental results prove that the method proposed can detect the thread densities of woven fabric correctly and it can be used to replace the current manual analysis.

Impact of dry cleaning on the electromagnetic shield characteristics of interlining fabric

Abstract: The research deals with the protective properties of sewn interlining fabric (IF) intended for pockets of jackets, trousers and other garments in order to protect a user from the harmful effects of the microwave radiation from mobile devices. The IF was produced from polyamide filaments coated with copper. Measurements of electromagnetic shieldings effectiveness regarding IF on the face and reverse side were done at frequencies of 0.9, 1.8, 2.1 and 2.4 GHz. These measurements were repeated after the dry cleaning process and also following the ironing through 10 cycles. Surface modification of tested IF was examined by scanning electron microscopy, SEM. The results showed complete loss of material protective properties after ten dry-cleaning and ironing cycles. Damage to the surface copper layer that allowed the passage of electromagnetic micro waves through the fabric cycles was also confirmed by SEM micrographs.

Current State of Pre-Consumer Apparel WasteManagement in Macedonia

Abstract: Effective utilisation of textile waste requires an accurate prediction of the quality of waste generated. Textile waste in Macedonia mainly consists of apparel cuttings. The aim of this research was to characterize the apparel cuttings waste, define the current state of apparel waste management and the potential barriers against introducing efficient waste management systems. Data was obtained via a structured questionnaire distributed to top managers in apparel manufacturing companies. The results indicated that almost all apparel manufacturers use landfills to dispose of their waste. The analysis showed that the waste stream consisted principally of woven fabrics, predominately cotton and cotton blends, with the presence of lycra. Bearing in mind the waste composition, the most appropriate end use for the pre-consumer waste produced is insulation materials. Considering that the industry consists of small and medium companies with limited resources, there is a low likelihood of individual investments in recycling equipment. Key words: textile waste, apparel cutting waste, textile waste management.

Dynamic behaviour of Various Fibre Systems During Impact Interaction - Numerical Approach

Abstract: The paper presented shows a part of investigations covering the contact problem in numerical modelling using an explicit code. The authors have outlined the parameters and factors that have a direct impact on a proper contact definition, which, as is known, has much importance in finite element analyses. For the purpose of the study, a test model was proposed, where an interaction between a net and chosen 3D object with relatively small geometric dimensions and low weight was simulated. Additionally several net structures were analysed in which their contact characteristic was modified. Different interaction con ditions in each case resulted in a different influence on the 3D object’s behaviour, especially its velocity and trajectory changes.

Application of Artificial Neural Networks to Predict the Air Permeability of Woven Fabrics

Abstract: Air permeability is one of the most important utility properties of textile materials as it influences air flow through textile material. Air permeability plays a significant role in textiles for clothing due to their influence on physiological comfort. Air permeability is also very important in technical textiles, especially for filtration, automotive airbags, parachutes, etc. The air permeability of textile materials depends on their porosity. There are a lot of structural properties of textile materials influencing air permeability and there are also statistically significant interactions between the main factors influencing the air permeability of fabrics. It justifies the application of artificial neural networks (ANNs) to predict the air permeability of textile materials on the basis of their structural parameters. Within the framework of the work presented ANNs were applied to predict the air permeability of cotton woven fabrics.

Lateral and Perpendicular Thermal Conductivity Measurement on Textile Double Layers

Abstract: In this paper, the temperature distribution on a double layered fleece textile was measured experimentally with infrared thermography. A theoretical model based on the thin plate theory was to interpret the results measured. A two dimensional simulation of the same problem was carried out as well. By fitting the experimental data with the models, thermal conductivities in the lateral and perpendicular directions could be determined.

Development of a Weaving Method for Spatial Two-Layer Innovative Structure Linen Fabric

Abstract: *Joint-stock „A grupė“ Ruklos 14, LT-55198 Jonava, Lithuania Abstract During the global technological progress, including in the textile field, it has become necessary to look for innovative solutions to make fabric designs that can be characterised by special texture and relief, as well as opportunities to create them with modern weaving looms. Most commonly, such innovative fabric structures can be woven by using several different methods, and sometimes by several weaving looms of different designs and uses. Thus this article provides an introduction and thorough analysis of two weaving methods used to weave such linen fabrics of innovative structure by modern computerised looms of different types and designs: the terry gripper weaving loom Smit GS940F and smooth fabric gripper jacquard weaving loom Dornier PTS 6/J C. In both cases the structure effects of those fabrics were rather similar. Most fabric properties are better for the fabrics woven by the second technique. For that kind of fabric structure it is therefore advisable to use the second weaving method, i. e. the smooth fabric gripper weaving loom Dornier PTS 6/J C. Smooth fabric looms are more versatile, and they do not require a set of specific complex mechanisms that are usually used on a terry gripper weaving loom.

Effects of Heat Treatment on Mechanical and Thermal Performance of Fabric used in Firefighter Protective Clothing

Abstract: 2Engineering Research Center of Technical Textiles, Ministry of Education, Donghua University, Shanghai 201620, P. R. China E-mail: cuizy@dhu.edu.cn Abstract With excellent thermal stability and resistance, X-fiper® fabric has been applied in firefighter protective clothing. In this paper, X-fiper® fabric was subjected to heat treatment at 6.5 kW/m2 and 9.7 kW/m2 for durations between 0 to 30 min. Effects of the heat intensity and exposure duration on mechanical properties, thermal protective performance, surface morphology, and structural properties were studied and analysed. The results showed that the intensity of heat flux had significant effects on the tensile strength, elongation at break, and tear strength. The tear strength of X-fiper® fabric was less than 100 N after 5-minute’s exposure at 300 °C. The thermal protective performance, however, did not change considerably. From the scanning electron microscope (SEM) analysis, specimens showed grooves, peel-offs and deposits as a result of heat treatment. The results observed by SEM and FTIR-Raman spectroscopy revealed the mechanisms of changes in mechanical properties and thermal protection.

Functional Properties and Electromagnetic Shielding Behaviour of Elastic Warp-knitted Fabrics

Abstract: An investigation was made on the electromagnetic shielding behaviour and other functional properties for manufactured multifunctional elastic warp-knitted fabrics. Bamboo charcoal polyester/Crisscross-section polyester (BC-PET/CSP) blended yarns were used as the back of the warp-knitted fabric while conductive composite yarns were used as the front. The variation in the far infrared emissivity and anion density of elastic-warp knitted fabrics produced with different proportions of BC-PET content were studied in detail. Moreover the electromagnetic shielding effectiveness (EMSE) of the fabrics with different elongation was measured in this study. The experimental results showed that increased elongation almost did not significantly affect the EM shielding behaviour of fabric K1 in the elongation range of 0 - 40%. Finally to increase the EMSE of the fabric, the lamination method was used in this study. EMSE measurement results showed that two layer K1 warpknitted fabrics with 90° interval displayed a better shielding effect against the EM wave compared to that with a 0° interval.

Comparative study of the characteristics of knitted fabrics produced from recycled fibres employing the Chauvenet criterion, factorial design and statistical analysis

Abstract: 19 Sanches RA, Takamune KM, Guimarães BM, Seawright Alonso R, Karam Jr D, Marcicano JPP, Sato Duarte AY, Dedini FG. Comparative Study of the Characteristics of Knitted Fabrics Produced from Recycled Fibres Employing the Chauvenet Criterion, Factorial Design and Statistical Analysis. FIBRES & TEXTILES in Eastern Europe 2015; 23, 4(112): 19-24. DOI: 10.5604/12303666.1152716 Comparative Study of the Characteristics of Knitted Fabrics Produced from Recycled Fibres Employing the Chauvenet Criterion, Factorial Design and Statistical Analysis Regina Aparecida Sanches, Karina Mitie Takamune, Bárbara Maria Guimarães, Raquel Seawright Alonso, Dib Karam Jr, João Paulo Pereira Marcicano, a)*Adriana Yumi Sato Duarte, *Franco Giuseppe Dedini

Evaluation of Sewed Thread Consumption of Jean Trousers Using Neural Network and Regression Methods

Abstract: This paper deals with the prediction of the sewing thread consumption of jean trousers using the neural network technique. The neural network results and analysis are discussed and investigated. Indeed the findings show that neural network consumption values give better fitting of experimental results than the ones obtained using regression technique. However, compared to the experimental consumption results, theoretical ones of the sewn jean pants seem widely predictable in the desired field of interest. Among the all parameters studied, statistical analysis results also indicate that five inputs can be considered as influ ential ones. When classifying these five influential inputs, only three parameters are con sidered most significant. In fact the thread consumed to sew jean trouser samples remains influenced especially by the thread properties and needle fineness as well. Compared with the regression model, the neural network model gives a more accurate prediction and to a great extent provides the amount of sewing thread.

Comparison of Selected Properties of Eco- Friendly Soybean and Other Fibres

Abstract: Biodegradable and sustainable products are being employed to make contributions to efforts concerning environmental protection and the reduction of oil consumption. Biodegradable fibres present a simple and notable opportunity for providing sustainable textiles. Soybean fibre is a kind of regenerated and new-generation protein plant fibre. The present work aimed to analyse the many different properties of soybean fibres. Particularly it was focused on their performance, functional, comfort and dyeing properties. In literature, there are studies regarding soybean fibres but topics mostly involved the analysis of comfort properties of the fibre. In this study, fibre structure and composition, flame and UV resist ance, strength, pilling behaviour, air and water vapour permeability, water absorption, drape and dyeing properties were studied. It was indicated that soybean fibre is capable of meeting the performance, comfort and functional requirements of classical and technical textile products. The fibre has many of the good qualities of natural fibres such as tenacity, moisture regain, soft-lustrous handle, dyeability and colour fastness properties, and also has some of the functional properties of synthetic fibres such as being flame retardant and anti-ultraviolet.

Dyeing of Textile Fabrics with Bio-dyes

Abstract: EU directives define in detail guidelines which modern industrial technologies should meet in order to eliminate or minimise their share in contaminating the natural environment. Reducing energy and water consumption, and restricting the use of hazardous substances in the environment are the basic criteria that should characterise new technologies. Due to restrictions in the use of azo dyes, especially of those which can be reduced to amino products (Directive 2002/61/EC), the dyestuff industry is constantly looking for new colouring substances. Particular emphasis is placed on the implementation of new technologies of synthesis which have a minimal impact on the environment and at the same time decrease manufacturing costs by reducing the consumption of raw materials and energy and reduce waste. Industrial processes belonging to white biotechnology successfully exploit the potential of natural biological systems in industrial processes, making industrial activity more environmentally friendly. Bio-dyes obtained in this way are durable, environmentally friendly, and have interesting and fast colours. The process of bio-dye synthesis occurs during processes applying enzymes or fungi with precursors that are used to synthesise chemical dyes. This paper presents newly synthesised bio-dyes. In their synthesis enzymes or fungi were used. During the research work, the dyeing properties of the bio-dyes were tested as well as the colour fastness of textiles made of protein and synthetic fibres. The resulting colours obtained after bio-dye application are more uniform than in the case of chemical dyes and have good colour fastness.

Investigation of Dimensional Changes During Garment Production and Suggestions for Solutions

Abstract: Dimensional change problems experienced in textile products have always been an important subject and in the focus of attention. Today it is expected that dimensional changes in fabrics, the basic material of textile products, must range within certain limitations. Fabrics processed in the finishing divisions are wound or decatized in various forms according to the fabric structure and the demands of garment manufacturers. However, fabrics may be distorted in these storing processes, which results in undesired dimensional changes under the stress incurred. Nevertheless fabrics are required to be delivered to garment manufacturers at specific tension values. Indeed these values are not acquired as expect ed; consequently, it is known that they represent a core conflict subject between finishing plants and garment manufacturers. The present study investigated the structures of garment manufacturers and dimensional change problems they experience during fabric layout. The aim was to determine the severity of the problem in terms of the garment manufacturer and fabric types, which cause problems frequently, and to search for solutions to overcome this issue by means of a survey study. Solutions which would increase production efficiency and reduce processing time have been emphasized.

Low Velocity Impact Behaviour of Aramid and UHMWPE Composites

Abstract: The most popular method to produce composites for ballistic applications is to use aramid and ultra high molecular weight polyethylene (UHMWPE) fibers as reinforcement materi als in different matrices. The composite materials used in this type of application, especially those used as armoring materials for explosions, are subjected to a very high level of energy. In this study, the effect of the reinforcement material type and cross-plied condition of reinforcement were examined using high-level impact tests. The impact tests were performed at low speed but high energy, and thus the behaviour of the composite materials that were exposed to high-level impact energy could be examined. According to the results, the UD aramid composite produced the best results with respect to high-level impact tests. In addition, mass optimisation could be achieved without the loss of the high-level impact energy by preparing a hybrid composite with UD UHMWPE and UD aramid fibers.

Study on Woven Fabric Structure Using 3D Computer Image Analysis for In-Depth Identification of Thread Channels

Abstract: Polipowski M, Wiecek P, Wiecek B, Jasinska I. Study on Woven Fabric Structure Using 3D Computer Image Analysis for In-Depth Identification of Thread Channels. FIBRES & TEXTILES in Eastern Europe 2015; 23, 2(110): 33-39. Study on Woven Fabric Structure Using 3D Computer Image Analysis for In-Depth Identification of Thread Channels Miroslaw Polipowski, *Piotr Wiecek, **Boguslaw Wiecek, Izabela Jasinska

Low-Formaldehyde Hydrophobic Cum Crease Resistant Finishing of Woven Silk Fabric

Abstract: In the present study, a low-formaldehyde based hydrophobic cum crease resistant finish ing of woven silk fabric was developed with a comparison of three commercially available cross-linkers (i.e., Knittex RCT®, Fixapret ECO® and Reaknitt EC®). The treatment parameters of cross-liker types and their concentrations were investigated in relation to the crease recovery angle (CRA), contact angle, tensile strength and air permeability of the silk fabric. The highest CRA of 265° was observed for the Reaknitt EC® treated silk fabric and for the untreated silk fabric it was 165°. The contact angle generally increased with increasing of the cross-liker concentration; and amongst the all the cross-linkers considered, Fixapret ECO® treated fabric exhibited the highest contact angle of 134.59°, whereas that of untreated was zero. The finishing additionally improved the air permeability of treated silk fabric with fair whiteness. The treated silk fabrics, however, showed a loss in tensile strength with an increase in concentration for all three types of cross-linkers. Scanning electron microscopy showed the impregnation of the finish into the treated silk fabric.

Simplified Model for Predicting Fabric Thermal Resistance According to its Microstructural Parameters

Abstract: School of Textile and Materials Engineering, Dalian Polytechnic University, Dalian, Liaoning, 116034, China Corresponding author: Ju Wei. E-mail:13238056518@163.com Abstract This paper presents a modified model to calculate the thermal resistance of woven and knitted fabrics according to the microstructural parameters. The model was established by analysing the heat transfer process in the simplified basic unit of the fabrics. The model was modified and checked by experimental values of various fabric samples. Pearson correlation coefficients between the thermal resistance and fabric structural parameters were calculated. Results indicate that fabric thermal resistance can be predicted by the modified equation satisfactorily. The Pearson correlation coefficient from high to low follows such a sequence: fabric thickness, fabric volume density, fabric structural parameter a, fibre volume density, and fibre thermal conductivity.