عنوان به زبان ديگر :
Impact of Compaction Treatments on PET Yarns Used for Vascular Prostheses Manufacturing
پديد آورندگان :
Ben Abdessalem Saber نويسنده , Zbali Ikram نويسنده , Litim Nasr نويسنده , Mokhtar Sofiene نويسنده
چكيده لاتين :
Textile cardiovascular prostheses are tubular structures made of polyester filaments.
Woven prostheses are naturally tight but knitted ones are porous and can
involve blood haemorrhage. Although compaction is necessary to reduce water
permeability of knitted prostheses used for arterial replacement, it can induce degradation
of mechanical properties of poly(ethylene terephthalate) (PET) yarns. We have
studied the effect of chemical and thermal compaction process parameters on the
physical and mechanical properties of PET yarns used for vascular prostheses manufacturing
in order to find compaction systems that do not provoke important changes in
the material characteristics. After chemical and thermal compactions, all yarn samples
displayed longitudinal shrinkage accompanied by lateral swelling and a loss of
mechanical properties. The analysis of chemical compaction results showed that fibre
shrinkage and swelling are linked to the sizes of solventsי molecules and immersion
duration. Compaction performances in thermal process are widely linked to treatment
temperature. The effect of the two compaction treatments on a PET single jersey fabric
permeability was studied as well.