The answer, in short, is that you can iron polyester, but not in the way you iron cotton, for example. While it is a very durable fabric, polyester fabric is a thermoplastic and, as plastic is wont to do, it can melt in high temperatures.Click to see full answer. Also question is, can you heat press 100% polyester?You use a “heat” press to adhere the transfers adhesive or ink to the fabric. The problem with this though is some fabric (ahem, polyester) is sensitive to high temperatures and the fabric fibers can scorch (melt). The ideal temperature is less than 300 degrees.Subsequently, question is, can you apply heat transfer vinyl to polyester? As you can see, HTV goes on so easily to anything made of polyester! But if you look around you’ll realize most fabrics you use are probably polyester! The melting point of polyester is pretty high (482 degrees Fahrenheit) which means that you’re at no risk for melting your polyester fabric using any of our HTV. Also know, can you use iron on transfers on polyester? Our custom iron-ons can be applied on all fabrics including for t-shirts, socks, pants, jackets, hats, backpacks, tote bags, and more! As long as the surface is flat and smooth, you’re good to go ironing! We recommend using our iron-ons on 100% cotton, 100% polyester, poly-cotton blends, or lycra/spandex fabrics.What temperature do you press 100 polyester?1. Heat Press Temp for Polyester. When pressing fabrics made of polyester, it’s highly recommended that you stick to low temperatures. The perfect values for time and temperature are 270 °F for about 10 seconds.