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Posebnosti kontinuirnega postopka izdelave poliamidnih 6 mikrofilamentnih prej = Pecularities of a continuous process for the manufacture of polyamide 6 microfilament yarns
Rijavec, Tatjana, 1962- ; Malej-Kveder, Sonja
Laboratorijsko oblikovane poliamidne 6 mikrofilamentne preje smo izdelali v kontinuirnem postopku oblikovanja vlaken s standardnimi dimenzijami šob (55 x fi 0.25 mm) z do 300-kratnim razvlekom ...plastične niti v predilnem jašku in neposrednim preoblikovanjem v treh conah raztezanja s celokupnim razteznim razmerjem do 3.4-krat (FDY postopek). S pasivnim dogrevanjem ekstrudirane nitke tik pod šobo smo dosegli znižanje napetosti preje v točki strjevanja in s tem razvlečenje pri ugodnejših reoloških pogojih. Izdelali smo poliamidno 6 mikrofilamentno prejo finosti 0.55 dtex/filament, specifične pretržne napetosti 40 cN/tex, pretržnega raztezka 30 % in modula elastičnosti 4.6 GPa. Iz analiz dolžinske mase, mehanskih lastnosti, gostote, DSC, dvolomnosti vlaken in difuzijskega koeficienta kislega barvila smo ugotavljali posebnosti strukture mikrovlaken v primerjavi s prejo klasičnega filamentnega titra.
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