Polyester fiber is one of the most used commercial fibers across the world. These are strong synthetic fibers made by blending the alcohol and acid and initiating a chain reaction. To know about complete Polyester Yarn Manufacturing Process watch this video . You can buy bellow items: Polyester Embroidery Machine Thread: https://amzn.to/3AhOrLC Polyester Hand Sewing Thread: https://amzn.to/3TkSijI Acrylic Yarn Skeins: https://amzn.to/3wxnBOI