HOW TO fuse plastic bags

I like to use fused plastic, because the material is easily available and versatile. I use it in quite a few of my projects.

I made a cardboard tray and lined it by fusing a plastic bag directly on the cardboard. I also made the handles for the tray by fusing plastic around a nylon cord. My junk mail and magazine vases have removable fused plastic linings. This lets me fill them with water for fresh flowers. I created plastic versions of my origami accessories with squares of fused plastic. These are great, because they’re more durable than the paper versions. I even use this technique to wrap gifts.

Fused plastic is waterproof, flexible, easy to work with, and a cinch to make. Let’s get started.

Supplies

  • 1 plastic bag
  • 1 pair scissors
  • wax paper, parchment paper, or copy paper (Forego used copy paper. Ink from the paper may transfer onto your iron or the plastic. Use new copy paper. You can always print on the paper after your done using it to your fuse plastic. I’m going to use wax paper because it’s what I have in my kitchen at the moment.)
  • 1 clothes iron
  • 1 towel, ironing board

How-To

  1. First, cut off the bottom seam of the bag.
  2. Now cut off the handles.
  3. Flatten out the bag.
  4. If you’re using a towel, layout it out on your work surface. I prefer using towels, because I find it easier to fuse sheets of plastic on a larger surface.
  5. If the plastic bag has printed graphics, turn the bag inside out. This prevents the bag’s ink from transferring onto your waxed paper or iron and smudging everywhere.
  6. Lay a protective sheet of wax, parchment, or copy paper underneath the bag.
  7. Place second a sheet on top.
  8. Set the iron on polyester or rayon and turn of the steam.
  9. Iron the plastic bag, running the hot iron from the center outwards. This prevents air from getting trapped in the bag and forming bubbles. If you do find bubbles you can pop them with a pin and iron over them. Keep the iron moving at all times running over the entire surface two to three times. The plastic bag will smoothen and the protective sheet will adhere to the plastic bag. Be careful to run the iron over the protective sheet only and not directly on the plastic bag, otherwise you may melt the bag onto your work surface and your iron.
  10. Turn the plastic bag over while keeping it sandwiched between the protective sheets.
  11. Iron this side of the plastic bag.
  12. Allow the fused plastic to cool.
  13. Once it’s cool to the touch carefully peel off the protective sheets. If the plastic isn’t fused completely sandwich it between protective sheets and iron again.
  14. Now you have a two-ply sheet of fused plastic. You can make it thicker by ironing another plastic bag onto it. Remember to sandwich the plastic between protective paper before ironing!

Useful tips

  1. Keep the scraps from the bottom and handles. You can place them on top and fuse them with the main part of the plastic bag too, so there’s no need to throw anything in the trash.
  2. Ironing your plastic a little longer will cause it to melt and form holes. This can make for an interesting texture, but be careful not to burn it!
  3. You can fuse multiple bags together to make an even thicker and durable plastic sheet. Fuse additional plastic bags by stacking one on top and fusing it completely before stacking on another. If you try ironing together a stack that’s too thick, the iron may not be able to fuse the bags in the center of the stack
  4. Cut out shapes from different colored bags and fuse it on fused plastic sheet for like an appliqué effect.
  5. I made my plastic origami accessories using four-ply fused plastic. You can even go up to six or eight-ply.
  6. There will be minimal fumes, so keep the door to your work room open or crack open a window.
  7. Here’s a tip from talented crafter, Arely. You can use clear plastic bags to laminate paper. If you use a clear plastic bag, be careful because it tends to melt faster. After fusing, the plastic will still be clear, but it will have a matte finish.
  8. Becky, the plastic crafting maven of Crop Rotation, says sewing plastic is like sewing regular fabric, but can be a little more slippery. Use denim sewing machine needles and general purpose yarn or denim yarn.

Becky, a college math professor with a crafty side, sent me a collection of Show & Tell projects. In her fused plastic projects, she uses rare bags, especially ones that friends or family bring back from other countries. She’s made a brilliantly graphic messenger bag and iPad sleeve by carefully composing a collage of prints. Check out more of her math influenced creations at Crop Rotation, and see what inspires her on her Pinterest.

Special thanks to:
Arely, Becky

Leave a Comment

Your email address will not be published. Required fields are marked *

56 thoughts on “HOW TO fuse plastic bags”

  1. Hey Bao! I may be a little late to the party on this one, but just a shout to let you know that you are still reaching people and influencing crafting in 2020!

    Also, I wanted to share a little from my experience that may help some with questions about seams. Once, I was making one of those giant water blobs for my son in my front yard. I was using a 4mil sheet of painters plastic, and no matter how hard I tried, my iron would not fuse the seams without rendering the wax paper impossible to remove (I was out of parchment). I scoured the house and tried about 15 combinations of heat sources and “non-sticky/melty” things. And finally – I stumbled on such a cool combo, that I’ll never look back!

    I had recently relined some drawers with Contact Paper. I grabbed the backing from one strip, folded it in half, and used the crease as my guide line. An added bonus, the measuring squares printed on the paper backing made for a nice guide to keep my seam even. And then – hear me out I know it sounds crazy- I got my straightening iron (yep, the one for my hair) and went to work. I found that having the double sided heat made for a beautiful flat seam, the contact paper backing didn’t melt at all and quite literally fell right off the cooled plastic, and other than wanting a workspace, no ironing board or towel was needed. Oh, and for the curious, my flat iron was set to 360° (to compensate for thicker protective layer) and took 4-5 passes at a 1″/sec rate to fuse.

    Happy Crafting!!

    1. Jennifer, that is amazing! Reusing the contact paper backing is stroke of genius and using your flat iron is truly inspired. Thank you for sharing your brilliant discoveries. I’m sure it will help so many others.

  2. Interesting idea. I may have to try it soon. Definitely adding it to my project list of thing craft things to learn (crocheting is on there currently).

    I like this fused plastic idea, in part because I am certain there is nobody in my area that does this. With some trial and error, I might be able to make some neat stuff to sell.

    I was wondering if there is a list some place of acceptable plastic to use. Clear plastic bags was mentioned… did you mean like sandwich bags? And can this idea be use with plastic containers? (I know there are DIY instruction to use plastic containers to make DIY Shrinky Dinks & other plastic projects in the oven.

    Thank you!

    1. Hi Dawn,

      Plastic fusing is a useful technique for creating a new material or as a construction method (like I did in my retail gift wrapping post). Clear plastic sandwich bags won’t work with plastic fusing. It’s the crinkly plastic shopping bags that you want to fuse together. There are many different types of plastic and they don’t all melt the same way or at the same temperature, so it’s best to stick to one type per a process or technique. Thanks for visiting and taking the time to write. Good luck with your projects!

  3. Hi ! What a great idea !! You guess what, now I can bring a cheap souvenir from EVERYWHERE I go only with my grocery bags… I knew that I could do something with those bags… Thanks a lot !!
    However, a question for you Bao… How many times can we reuse the paper sheet ?

    A French fan 🙂

    1. HI Liz! That’s sounds like a great idea for plastic bags you get from shopping while on vacation! When I use waxed paper it starts to stick to the plastic after two to three fusings. If you use paper that goes into laser printers it is most likely not to stick at all. You can also try parchment paper. Thanks for taking the time to visit and write!

  4. Hello. Would this technique work for making plastic bags smaller? I am not able to find the size I need and the bags I have are a couple of inches too wide. Thank you for your input.

    1. Hi Kenzie. Fusing plastic bags won’t shrink them, but if you want to make a smaller bag from a larger bag, you just need to snip off excess and fuse the edges. I hope that’s what you’re asking. Thanks for taking the visit and write!

    2. I would assume just cutting out the size you want and then fusing would work just fine. I’m also assuming using files to shave off the edges might work to trim the edges or using a Dremel with the appropriate bit would also work… if fusing individual pieces of a size you want (or shape!) has mildly crooked edges.

Scroll to Top