| With the continuous improvement of people's material and cultural living standards,women have higher requirements for thermal underwears.The thermal properties of the fabric can be improved by the new thermal fibers,which reduces the heavy feeling of traditional warm clothing,making the fabric lighter and warmer.The special function of the seamless knitted underwear equipment makes the garments processed by the equipment have the characteristics of no side seam,the connection of various structures is seamless,and a variety of fibers or yarns can be used to the process.Seamless knitting technology is very suitable for weaving underwear products.In this paper,new types of thermal underwear have been designed by using new thermal fibers and changing fabric organizations.This topic selects far-infrared fibers that can produce thermal effects on objects in the form of radiation and graphene inner warm fibers that can promote microcirculation,moisture absorption,air permeability,and antibacterial and antibacterial effects as research raw materials.Seamless Knitting Technology is used to design the warm seamless underwears.The purpose of making warm seamless underwears is to keep underwears comfortable while maintaining warmth,as well as the effect of body shaping.First of all,the same standard of nylon,far-infrared nylon and graphene inner warm nylon have been chosen to combined with the 22 dtex spandex as ground yarn for seamless underwear products.;55.6dtex ordinary nylon and 12 Tex ordinary viscose and graphene inner warm viscose have been chosen as upper yarn.;Three fabric structures have been chosen in this experiment.Based on the orthogonal array design,nine fabric samples were knitted on a seamless underwear machine.Secondly,in this paper,based on the orthogonal array design,the pre-shaped process was studied,and the optimal pre-shape process parameters were obtained: the heat-setting temperature was 170°C,the heat-setting time was 45 s,and the fabric expansion rate on fabric was 3%.According to the result of the study,the 9 fabric samples were preheated,and then the sample fabrics were dyed,shaped,etc.Thirdly,based on the orthogonal array design,the influence of the ground yarn,the upper yarn,and the structure on wearing performance of thermal underwear was discussed in this paper.The results were as following:(1)The graphene inner warm nylon fiber as the ground yarn has the best performance on the thermal properties of the fabric,followed by the far infrared fiber,but the moisture permeability is worse than the common nylon fiber.(2)When nylon yarn is used as the upper fiber,the pilling resistance of the fabric is better than that of the viscose,but the moisture permeability of the latter is superior to the former.(3)The structure of the fabric has the greatest effect on the performance of the product.The 3+1 simulate rib knit structure has the best lateral elastic recovery and the thermal properties also perform the best,and the vertical elastic recovery and moisture permeability of the plain stitch are the best.(4)Fuzzy mathematical analysis results to that the sample has the optimal performance for warm underwear is with graphene inner warm nylon as the ground yarn,nylon as the upper yarn,and 3+1 simulate rib knit structure.Finally,this paper designed and developed three seamless knitted underwear and two trousers that are warm,close to the body,comfortable and have a shaping effect in combination with the results of fabrics research and seamless knitting technology.Compared with the thermal underwear being sold on the market,the results show that the warmth of the seamless thermal underwear in this subject meets women's need for warmth.In addition,it is possible to achieve further warming requirements in specific areas,and it is close to the body,comfortable and have a shaping effect. |
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