It is called bondaweb here in UK - it isn't permanent though - you would need to zig zag as well as mentioned below.
PIECE OF CAKE!
Once you've stitched out your design:
1. Unhoop it
2. Trim around it leaving about 1/4 inch
3. Turn the design over with the back facing up
4. Cut a piece of Heat 'n' Bond Ultra the size of the trimmed design
5. Fuse the adhesive to the back of your design
6. Trim close to the edge, being careful not to clip your stitches.
7. Remove the paper backing of the adhesive, flip, position & iron down
ENJOY!
That's how I do it, but I zig zag as well, especiaaly on items that will get washed often.
Had to sew a lot of Girl Scout and Boy Scout badges on and the iron on stuff didn't last long so I used matching or invisible thread and zig-zag them on. If you want to remove the zig-zag stitch is easy to take out. Have made some just using the applique method on fabric with wash away and they turn out great. There is a special iron on made just for badge making but I found it expensive.
Magic applique - greaseproof type paper with a vilene type stuff stuck to it which you then iron on to the back of your design. Cut out, remove paper, iron onto your main fabric. I think in the States it is called Wonder Under.
Been doing this for years on my stoles until I bought my embroidery machine. It does enable you to do large designs for banners etc.
*4U OOps forgot, the design must then be satin stitched down. I use my rayon or polyester embroidery thread.
emblibrary to the rescue!
I dont have an answer to your question. but was reading about something similar in a decoupage book. It said you get a type of vilene with both sides being iron on. You iron your material cut out shape (eg star) onto one side of the vilene and when you are ready you peel off the "sticker" and iron onto your garment - Could it work in our case to use a very thick iron on vilene and embroider onto one side and can then iron the iron-on onto garment.
I don't know how to do this either. Can't wait to see the answer. I would love to make some for my grandsons. Shar