Yes, you can iron-on acrylic yarn. This is a great way to add a little bit of extra interest to your projects. Acrylic yarn is made of plastic, so it melts when heated. This makes it possible to use an iron to transfer designs onto it.
To iron-on acrylic yarn, start by placing the design you want to transfer onto a piece of parchment paper. Then, set your iron to the wool setting and place the iron on top of the design, making sure that the iron doesn't touch the yarn directly. Leave the iron in place for about 30 seconds, then remove it and allow the design to cool. Once it's cooled, you can peel the parchment paper off and enjoy your new design!