Introduction

Polymers can be easily infected by bacteria or fungi, which consequently results in the transmission of diseases and severe infections. Prevention of microbial colonization onto the polymeric surfaces can be fulfilled by adding active antimicrobial agent like silver nanoparticles into the polymers. Polyester is a category of polymers that contain the ester functional group in their main chain. In comparison with other industrial fibers, polyester fibers have high tenacity, low water absorption and minimum shrinkage. This material is widely used in the clothing industry. Silver ions and its compounds are extremely lethal for a wide range of bacteria, whilst they show very low toxicity for human cells. Therefore, silver is widely used as an antibacterial agent.

These synthetic fibers are produced from the polymerization of the viscosity of dimethyl terephthalate or Terephthalic acid and Ethylene glycol in the procedure which is named melt spinning. Polyester fibers are found in the market with other commercial names such as Dacron and Terylene. These fibers are used in making carpets, floor coverings, and sleeping products like pillows, quilts, mattresses, and dulls. Also Polyester fibers are mainly used in garments, clothes, different types of textiles. Their resistance against constant, heavy movements and their water resistance make them count as a perfect fiber to use as an ideal fiber in wet and humid environments.

The largest share of produced yarns including synthetic and natural is made up of the polyester fibers. Polyester fibers, like all other synthetic fibers, are manufactured industrially. In terms of characteristics, they are good alternative for natural fibers, such as cotton. To produce polyester, the combination of dimethyl terephthalate and polyethylene glycol or terephthalic acid (a substitute for dimethyl terephthalate) is used in the vicinity of proper catalysts.