Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
77,818
result(s) for
"Yarn"
Sort by:
Edmund unravels
\"A ball of yarn with a love of adventure learns the importance of staying connected to his loved ones at home\"-- Provided by publisher.
Book
Comparative analysis of cotton covered elastomeric hybrid yarns and denim fabric properties
In recent decades, consumer expectations and behavior have altered, focusing on more comfortable, well-fitting clothes. Wearing a slim-fitting garment helps to move more freely. Different elastomeric polymers are being introduced as a core constituent of the yarn to make denim fabric more comfortable during movement. The use of elastic material ensures that the material is stretchable and recoverable. The performance of several elastomeric hybrid yarns has been investigated in the first section of this study. Here, polyethylene terephthalate/polytrimethylene terephthalate (PET/PTT (T400®)), polytrimethylene terephthalate (PTT (Solotex®)), polybutylene terephthalate (PBT), and Lycra® (elastane) were used as the core component of the core and dual core-spun yarns. After that, 3/1 Z twill denim fabrics were made with these as weft yarns, and the fabric’s performance was assessed. It is found that dual core-spun yarns were shown to have lower strength than core-spun yarns, while it had a higher elongation value. PTT/PBT dual core-spun yarn had less unevenness and hairiness than yarn made solely of elastane. PBT in the core of the weft yarns provided strong strength, dimensional change, and stiffness qualities in the fabric. In contrast, elastane in the core of the weft yarns provided good elastic performance. Yarn and fabric performance for the hybrid yarns were statistically significant at a significance level of 0.05.
Journal Article
Crochet stashbusters : 25 great ways to use up your yarn leftovers of one ball or less
\"Twenty-five patterns chosen because they are perfect for using up leftover balls--or part-balls--of yarn.\"--Page [4] of cover.
Book
Knitted Strain Sensors: Impact of Design Parameters on Sensing Properties
This paper presents a study of the sensing properties exhibited by textile-based knitted strain sensors. Knitted sensors were manufactured using flat-bed knitting technology, and electro-mechanical tests were subsequently performed on the specimens using a tensile testing machine to apply strain whilst the sensor was incorporated into a Wheatstone bridge arrangement to allow electrical monitoring. The sensing fabrics were manufactured from silver-plated nylon and elastomeric yarns. The component yarns offered similar diameters, bending characteristics and surface friction, but their production parameters differed in respect of the required yarn input tension, the number of conductive courses in the sensing structure and the elastomeric yarn extension characteristics. Experimental results showed that these manufacturing controls significantly affected the sensing properties of the knitted structures such that the gauge factor values, the working range and the linearity of the sensors varied according to the knitted structure. These results confirm that production parameters play a fundamental role in determining the physical behavior and the sensing properties of knitted sensors. It is thus possible to manipulate the sensing properties of knitted sensors and the sensor response may be engineered by varying the production parameters applied to specific designs.
Journal Article
A bedtime yarn
Frankie is a little bear who has a hard time falling asleep. The dark is scary, and he hates to be alone. So his mother gives him a ball of yarn to hold when he goes to bed, and she keeps the other end in the next room, working it into a surprise for Frankie.
Book
Yarn on yarn abrasion failure mechanism of ultrahigh molecular weight polyethylene fiber
Yarns of fiber assemblies such as ropes would abrade with each other during repeated stretching or bending. The yarn on yarn abrasion failure is a main reason for the final assembly failure as the result of the relative movement to each other. To explore the influencing factors and failure mechanism, this work, taking the Ultra High Molecular Weight Polyethylene Fiber (UHMWPE) as the research object, discussed the influences of abrading frequency and the yarn tension on its abrasion life. Based on the observation and analysis of the rising temperatures from abrasion, the abrasion fragments, and morphology of failed yarns, the heating failure and crack propagation mechanisms were proposed, which provide insights into a variety of UHMWPE product designs and applications.
Journal Article
Textile-Based Weft Knitted Strain Sensors: Effect of Fabric Parameters on Sensor Properties
The design and development of textile-based strain sensors has been a focus of research and many investigators have studied this subject. This paper presents a new textile-based strain sensor design and shows the effect of base fabric parameters on its sensing properties. Sensing fabric could be used to measure articulations of the human body in the real environment. The strain sensing fabric was produced by using electronic flat-bed knitting technology; the base fabric was produced with elastomeric yarns in an interlock arrangement and a conductive yarn was embedded in this substrate to create a series of single loop structures. Experimental results show that there is a strong relationship between base fabric parameters and sensor properties.
Journal Article
Investigation of the Performance of Cotton/Polyester Blend in Different Yarn Structures
The demand for polyester fiber is increasing gradually day by day. Because of its good strength, low manufacturing cost, and ease of modification, polyester fiber has distinct characteristics, whereas cotton is well known for its comfort. Blending these fibers improves the performance of yarns. In this study, cotton/polyester was blended in different ratios to evaluate yarn performance. Three groups of yarn: rigid, core, and dual-core-spun, have been produced to examine the yarn’s performance. From the study, it has been found that increasing the polyester blend ratio increases the yarn strength and elongation but decreases the yarn unevenness and imperfections. Among the group, having more core components decreases yarn strength, unevenness, and imperfection but increases elongation. From the statistical analysis, except strength, all other properties have good interaction on yarn type and blending ratio. Pearson correlation also indicated that elongation and hairiness have a good correlation with yarn type where, except for hairiness, all other properties have shown a strong positive correlation on blending ratio.
Journal Article
Textile Strain Sensor Enhancement by Coating Metal Yarns with Carbon-Filled Silicone
Flexible and stretchable strain sensors are an important development for measuring various movements and forces and are increasingly used in a wide range of smart textiles. For example, strain sensors can be used to measure the movements of arms, legs or individual joints. Thereby, most strain sensors are capable of detecting large movements with a high sensitivity. Very few are able to measure small movements, i.e., strains of less than 5%, with a high sensitivity, which is necessary to carry out important health measurements, such as breathing, bending, heartbeat, and vibrations. This research deals with the development of strain sensors capable of detecting strain of 1% with a high sensitivity. For this purpose, a total of six commercially available metallic yarns were coated with a carbon-containing silicone coating. The process is based on a vertical dip-coating technology with a self-printed 3D coating bath. Afterwards, the finished yarns were interlooped and stretched by 1% while electrical resistance measurements were carried out. It was shown that, although the coating reduced the overall conductivity of the yarns, it also improved their sensitivity to stress. Conclusively, highly sensitive strain sensors, designed specially for small loads, were produced by a simple coating set-up and interlooping structure of the sensory yarns, which could easily be embedded in greater textile structures for wearable electronics.
Journal Article
Yarn on yarn abrasion performance of high modulus polyethylene fiber improved by graphene/polyurethane composites coating
As a high-performance fiber, high modulus polyethylene fiber (HMPE) has been widely used in the rope industry. However, due to its low melting point and poor thermal conductivity, it tends to break under the conditions of repeated yarn on yarn abrasion during tension-tension fatigue or tension-bending fatigue. This paper puts forward a method to improve the yarn on yarn abrasion performance of HMPE using a functional graphene/polyurethane composites coating (FG/PU) and discussed the influence of yarn tension, abrasion frequency on the yarn on yarn performance. Based on the yarn morphology and abrasion temperature observation, the failure mechanism was discussed. The experimental results show that the FG/PU coating obtained can improve the yarn on yarn abrasion performance obviously, especially in the case of high-frequency and large tension condition.
Journal Article