Research And Development Of Coffee Yarn Knitted Fabrics

Under the circumstances of increasing energy consumption and scarcity of resources,people gradually realized the importance of developing low-carbon economy and changing lowenergy usage rate. With the improvement of living standards, textile fabrics need not only goodwearability but also excellent functionality. Thus, waste coffee grounds have been fully utilized.Coffee grounds carbonized at about1000℃temperature, then ground to about100nm powder.Coffee charcoal nanoscale particles is added to the polyester spinning solution according to acertain percentage. Then produce a coffee charcoal modified polyester fibers. Thus improve theutilization of social resources and apply in the the functional textile fabrics.In this thesis, the longitudinal and transverse sections of coffee carbon polyester fibers wereobserved. coffee carbon polyester fiber longitudinal surface attach many small coffee charcoalparticles and pores, being rough and uneven. Transverse sections is irregular polygon, inlaid withpowder particles, and have obvious cavity structure, which is beneficial for absorption. Forcoffee carbon polyester fiber, length is38mm, fiber fineness is1.67dtex, The moisture regainis1.62%, breaking tenacity is3.37cN/dtex, initial modulus is19.89cN/dtex.Coffee carbon fabric has good functionality, but is deficient in air permeability andanti-pilling. Considering the functionality and comfort requirements, design five differentproportions of coffee carbon polyester fiber and viscose blended yarn as follows,30%coffeecarbon polyester fiber/70%viscose,40%coffee carbon polyester fiber/60%viscose,50%coffeecarbon polyester fiber/50%viscose,60%coffee carbon polyester fiber/40%viscose,70%coffeecarbon polyester fiber/30%viscose. Interlock stitch fabric and tuck stitch fabric is woven byeach proportion yarn.Coffee carbon fabric can’t dye into light color due to coffee fiber’s dark color. Dark color orgray fabric does not satisfy colorful color requirements of most consumers. Select bright coloreddye disperse red luminous4B-E to dye50%coffee carbon polyester fiber/50%viscose interlockstitch fabric. Experiments show that the best dyeing process at pH5is dyeing temperature130℃,dyeing concentration1.2owf, dyeing time45min. Then dye other five different proportions ofblended fabrics, with scaled up or down the dye concentration based on the best dyeing process of50%coffee carbon polyester fiber/50%viscose fabric.Test and analyze performance of five kinds of fiber proportion dyed interlock stitchfabric(A series), five kinds of fiber proportion undyed tuck stitch fabric(B series), five kinds offiber proportion dyed tuck stitch fabric(C series). The performances include far-infraredproperties, odor absorption, permeability, drapability, flexibility, thermal and wet resistance,anti-pilling, and soaping color fastness,dry and wet friction color fastness of dyed fabrics.For same series, with the increasing coffee carbon polyester fiber content of five fabrics, thefunctionality of far-infrared properties and odor absorption rate gradually increased. Far-infraredemissivity is as high as92.7%and odor absorption rate is61.7%when coffee carbon polyesterfiber content is70%. Air permeability and flexibility decreases, anti-pilling property changesuneven and decrease on the whole. Thermal and wet resistance increase. Decreasing wetresistances and increasing air permeability improve the fabric comfort when viscose fibercontent increase. By fuzzy comprehensive evaluation, the fabric of60%coffee carbon polyesterfiber/40%viscose has better functional and wearability performance.A series of interlock stitch fabric have tighter structure and heaver weight per square meterthan C Series of tuck stitch fabric, higher coffee carbon polyester fiber content per square meter.In the same proportion, A series have higher far-infrared emissivity and odor absorption rate,lower permeability and flexibility, higher thermal and wet resistance, but better anti-pilling.Compare B series of undyed tuck stitch fabric and C series of dyed tuck stitch fabric, Cseries fabric is subject to certain effects of dyeing process, at the same proportion of carbon fibercontent, B series have higher far-infrared emissivity and odor absorption rate, which meantwashing, dyeing and soaping in the dyeing process decrease function of Coffee carbon fabric.According to the above experimental results, select dyed fabric of60%coffee carbonpolyester fiber/40%viscose to design a set of underclothes, vest, T-shirts. The products haveexcellent health care of far-infrared function and odor absorption function as well as goodwearability, will have prosperous market.