Fatemeh ASHRAFI, Mohammad Reza BABAEI LAVASANI

Improvement of the mechanical and thermal properties of polyester nonwoven fabrics by PTFE coating

Polyester (polyethylene terephthalate) is one of the most widely used polymers in textiles. Despite all theadvantages of this polymer, its low thermal resistance limits its use in filters and protective textiles. On the otherhand, polyester nonwovens are used in many products as wipes, filters, and padding. The surface properties of polyesternonwovens are often not perfect for a specific application and need to be modified. Different ways, including coating, havebeen developed to modify their surface properties. Therefore, in the present study attempts were made to investigate theimprovement of the thermal resistance of a polyester nonwoven by coating. A polytetrafluoroethylene (PTFE) coatingwas applied to improve the thermal and flame resistance of this fabric. The mechanical properties of coated sampleswere examined as well. According to the results, surface coating using PTFE is effective in terms of flame retardancyand controlling the thermal shrink of polyester nonwovens. The mechanical properties of the coated samples were alsoimproved.

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