Preparation and properties of flame-retardant anti-droplet PA 6 bulky filament
By blending self-made flame retardant anti-droplet masterbatch with polyamide 6(PA 6)chips,flame retardant an-ti-droplet PA 6 bulky filament was prepared by melt spinning-drawing-texturing one-step method.The effect of masterbatch con-tent on the flame retardant and anti-droplet properties of fibers was emphatically studied.And the fiber morphology,mechanical properties,thermal shrinkage performance and crystallization behavior were characterized.The results showed that the flame re-tardant anti-droplet PA 6 bulk filament had a single fiber diameter of about 50 μm and a cross-section of an arc-shaped triangle,and the texturing and fluffiness effect of the fiber deteriorated as the content of the masterbatch increased;the limit oxygen index(LOI)of flame-retardant anti-droplet PA 6 bulky filament increased with the increase of masterbatch content,the fiber LOI reached 29%when the masterbatch mass fraction was 7.5%,and the fiber LOI reached 33%and the anti-droplet performance was good when the masterbatch mass fraction was 10.0%;the breaking strength of flame-retardant anti-droplet PA 6 bulk filament was stable at about 2.60 cN/dtex without much change with the increase of masterbatch content,and the comprehensive mechani-cal properties of the fiber were optimized when the masterbatch mass fraction was 7.5%;the boiling water shrinkage of flame-re-tardant anti-droplet PA 6 bulk filament decreased,the glass transition temperature and melting range first decreased and then in-creased,and the melting peak temperature,melting enthalpy and crystallinity first increased and then decreased with the increase of masterbatch content;and taking into account the flame retardant and anti-droplet properties as well as the mechanical proper-ties of the fibers,while also considering the fluffiness of the fibers,the mass fraction of flame-retardant anti-droplet masterbatch should appropriately be 7.5%for preparing flame-retardant anti-droplet PA 6 bulk filament.
万方数据
维普
