Research On High-strength & Wear-resisting Apocynum Venetum Wrapped-spun Process And Fabric

Apocynum venetum is a pure natural, green and environmental protection product, collects the characteristic as soft of cotton, stiff and neat of hemp and luster of silk, has permeability, hygroscopicity and bacterial inhibition. While put on it, neither stick the body nor has smelly sweat, has the characteristic of "cool when hot, warm when cold". It is suitable for falling the pressure placidly and chronically of hypertension patient. As a upscale knitting fahric, apocynnm venetum receives the attention and recognition of domestic and foreign textile and medical area. But because of the apocynum venetum characteristic and incomplete preliminary working craft, the quality of degummed apocynum venetum is poor such as more fibrous, unevenness, lower strength and poorer wearing-resisting. It not only brings difficulty to the following processing of spinning, but also leads to lower fine degree of the product and reduces the service life. It will prevent the promoted utilization of apocynum venetum fiber and product without doubt.In this article, the composite yarn which makes up of apocynum venetum and nylon is processed by the principle of wrapped-spun, its another name is covered-spun, which is one of the new type spinning. The nylon filament covers on the outside of apocynum venetum blended yarn as the form of spiral. Because the nylon filament is a high-strength & wear-resisting fiber, which made the yarn both have the antibacterial medical characteristic of apocynum venetum and high-strength & wear-resisting merit of nylon fiber, so it enhances the strength and wear-resisting, improve the spinnability of apocynum venetum yarn.This paper mainly includes six parts. In the first part, the current and research actuality of wrap spinning, the development and main type of wrap spinning machine, the aim of this thesis and the research content are introduced. In the second part, the working principle and technical specification of HKV141D-I wrapped-spun machine are introduced briefly, and the spinning value of apocynum venetum and main property of nylon filament are also introduced. In the third part, on the base of experiment, single-factor analysis is designed, the relationship between the factors and mechanics & wear-resisting can be known. In the fourth, using a series of orthogonality, size of out filament, wrapped-twist, pre-tension of heart yam, space of traverse guide are selected as processing parameters, variance analysis with the strength and wear-resisting of wrapped-spun, optimal processing parameters are given. In the fifth part, principium of spinning is studied, using fuzzy mathematics, contrast single & double wrapped-spun yam with apocynum venetum blended yam. In last part, using multi-objective decision-making, the property of wrapped-spun fabric is analysed, optimal processing parameters can be known, and the conclusion of orthogonality analysis is validated.The test result indicated, on the premise of fiber properties, wear-resisting and strength are improved, the spinning and weaving ability are improved. A prosperous way was opened to develop composite spinning for properly utilizing the lower quality yams.Postgraduate student: Xu Ying (Textile Engineering)Directed by Prof. Han—Han Guangting...