What is the meaning of to intermingle while weaving?5 answersIntermingling in weaving refers to the process of combining different types of yarns, such as thermoplastic resin fibers and reinforcing fibers, to create a hybrid yarn with enhanced strength and unique properties. This technique involves intertwining multifilament yarns at entanglement points and open parts along the yarn's length, altering the tensile strength and knot numbers of the yarn. By utilizing methods like air spraying or fluid streams to intermingle yarn filaments, a fine irregular structure is formed on the fabric's surface, enhancing glossiness, touch, and weaving processability while maintaining easy care properties. Intermingling is becoming a preferred method over traditional techniques like sizing and twisting due to its ability to improve filament yarn resistance to stress and create sophisticated fabric effects.
How groove is formed?4 answersGrooves can be formed in various ways depending on the specific application. One method involves using a laser beam to form a groove on the surface of an object. This is done by focusing the laser beam on the object, with a portion of the beam shielded by a shielding plate to create the desired groove shape. Another method involves using a groove forming template system, which includes different templates connected together. This system allows for efficient and effective groove formation, with the ability to create various groove structures. In semiconductor manufacturing, a groove structure can be formed by depositing a protective film, etching the substrate, and removing the protective film in a cyclic process. Additionally, a groove forming method using polycrystalline silicon layers and oxide layers can be employed, reducing the requirements for manufacturing narrow grooves and lowering device manufacturing costs. In the case of forming linear grooves in a steel sheet surface, a method involving resist removal through laser irradiation and subsequent etching is used.
How is lactic acid formed?4 answersLactic acid is formed through various processes such as condensation reactions, fermentation, and bioconversion. In condensation reactions, lactic acid is synthesized through dehydration at high temperature under catalysis. Fermentation is another method where lactic acid is produced by fermenting sugars obtained from renewable resources. This process involves cultivating strains of bacteria or yeast capable of yielding lactic acid by consuming sugars in a seed medium and fermenting the biomass-based material with the seed culture. Bioconversion is also used to produce lactic acid from whey by-products rich in lactose and minerals. This method involves neutralizing the whey by-product, fermenting it with a bacterium capable of converting lactose to lactic acid, and then acidifying the fermentation broth to release lactic acid.
What are the advantages and disadvantages of using yarn as a clothing material?5 answersYarn as a clothing material has several advantages. It can provide acid resistance, alkali resistance, high temperature resistance, low temperature resistance, good hygroscopicity, and absorption of sweat generated by the human body. Yarn also plays a crucial role in determining the functional and aesthetic aspects of clothing. Additionally, yarn parameters can affect the thermo-physiological comfort of woven fabrics, such as thermal resistance, thermal conductivity, thermal absorptivity, and air permeability. Furthermore, using compact yarn in fabric manufacturing can result in better crease resistance, good wrinkle recovery, and higher durable press, leading to improved fabric aesthetics. On the other hand, there are no specific disadvantages mentioned in the abstracts regarding the use of yarn as a clothing material.
What yarn has better pilling performance : mvs or rotor yarn?4 answersMVS yarn has better pilling performance compared to rotor yarn.
What is yarn?1 answersYarn is a material used to make fabrics and garments. It consists of one or more strands, with each strand having an outer layer twisted around a continuous or substantially continuous core. The outer layer of the yarn can be made of coarse wool fibers with an average diameter greater than 26 microns. Yarn can also be made from synthetic fibers, where the yarn includes a first continuous filament fiber and a second continuous filament fiber. The first filament fiber is produced by extruding molten polymer through an orifice and varying the rate of polymer extrusion to create variation in filament denier along its length. Additionally, yarn can be cut resistant and made from a blend of staple fibers, with the first staple fibers encasing a hard component and the second staple fibers being different from the first staple fibers. Yarn can also be made with a mixture of natural fibers and inherent fire-retardant fibers, providing resistance to traction, tear, and abrasion, as well as protection against electric arcs.