Embroidered patches come in all states and sizes, but they also come with a variety of different backings. The most common backings for modern patches are straight twill and iron on backings; both of which have very specific indications in terms of mounting them. We've listed below the four most common used backings along with a short description of each.
Twill Backing
The twill is the thin layer on the back of the patch that keeps all of the embroidery in place. If your patch has a twill backing, it will be very flexible and must be sewn in place. Twill used to be the predominant on used for military patches through World War II.
Plastic Backing
Plastic backing is been used to give patches more rigidity and overall strength. A plastic backing is not the same as an iron-on one, as you would clearly see if you tried to apply it using a hot iron. Since the plastic backing does not melt, patches with this type of backing must be sewn on.
Iron-on Backing
The iron-on backing is perhaps the most popular one used today. It provides an adhesive layer which, when heated with an iron, melts and causes the patch to stick to fabric. Just be careful not to use iron on patches with leather or vinyl. The glue will not adhere to these two surfaces, and will leave a burn spot or stain.
Hook and loop Backing
Hook and loop backing is becoming more and more popular for use with military patches. In the armed forces, where patches are removed and replaced with regularity, designers have figured out that the Hook and loop is much easier use. One half of the Hook and loop is sewn into the patch, while the other half is attached to the clothing with adhesive or thread.
