Study On The Technology Of Orange-petal Two-component Spunbonded Microfiber Synthetic Leather Base Fabric

This paper is divided into three parts to explore segmented-pie bicomponent microfiber leather base technology,the first part is to choose four different soft finishing processes for nonwoven soft finishing,exploring the best soft finishing process.The second part is to explore the five different gradient structures of the preparation and properties of nonwovens;The third part is the application the best soft finishing process for gradient structure nonwovens of the most excellent comprehensive properties.In order to obtain hollow segmented-pie ultrafine fiber nonwovens with excellent comprehensive properties,four different processing methods of softening disposition including physical washing,alkyl quaternary ammonium salt softener,organic silicon softener and chemical alkali softening were used to treat polyester/polyamide 6 nonwovens.Effects of different softening treatment processes on properties of nonwovens were studied,and the cross-section morphologies was also observed and analyzed.The results show that hollow segmented-pie ultrafine fiber nonwovens treated with mechanical softening,alkyl quaternary ammonium salt softener softening,organic silicon softener softening are increased in crease recovery,bending resistance,draping property,softness increased,breaking strength slightly down,and tear strength.The chemical alkali softening treatment effect is the best,but the fibers are damaged and mechanical properties are the poorest.Compared with the other three different treatment technologies,hollow segmented-pie ultrafine fiber nonwovens treated by organic silicon comprehensive performance is the most excellent.As the gradient structure of the segmented-pie bicomponent spunbond microfiber nonwoven becomes more obvious,the surface area spread ratio of the nonwoven is the greater,the areal density and the thickness remain unchanged,the rebound angle of the dead rebound,The recovery angle tends to decrease as a whole,and the crease recovery becomes worse;the bending stiffness in vertical and horizontal directions decreases.The nonwoven with the gradient structure of 95%has the lowest flexural rigidity and the longitudinal and transverse flexural rigidity are 14.75 mN cm,13.79mN cm.The static drape coefficient and dynamic drape coefficient of nonwoven are similar.The breaking strength increases gradually.The longitudinal and transverse rupture strengths of nonwoven are similar.The longitudinal rupture strength is slightly higher than that of transverse rupture strength.Among them,95%,75%and 55%of the gradient structure have a ratio of longitudinal and transverse rupture strengths of 1.157,1.117 and 1.109,respectively;the elongation at break in longitudinal and transverse directions is not significantly different,but the transverse rupture elongation is slightly higher than the longitudinal rupture elongation;The cracking strength gradually increased and then decreased,but the degree of reduction was not significant.The transverse tear strength was greater than the longitudinal tear strength,but the difference was insignificant.Comparing the overall performance of the hollow orange petal microfiber non-woven fabric with five gradient structures,the gradient structure is 75%,and the hollow orange petal microfiber non-woven fabric with 95%performance is superior.Gradient structure of 75%,95%of the segmented-pie microfiber nonwoven after soft treatment,the crease recovery increases,the bending stiffness decreases drape performance has been significantly improved,a slight decline in breaking strength,tearing strength.The moisture permeability of the nonwoven with gradient structure of 95%is up to 229.859 g/(m2·h).