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 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

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54 thoughts on “HOW TO fuse plastic bags”

  1. 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!

  2. 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.

  3. Hello! Have you ever tried this with hard crinkly plastic – like the bags in which individually wrapped candy are packaged? Thanks for the tutorial!

    1. Hi Lena!

      Oh, now THAT is a great question! The hard crinkly plastic used for individually wrapped candies is probably cellophane. This type of plastic won’t melt together very well, but it will tend to burn. Some cellophane food wrappers look like they are sealed by melting, but are actually sealed with a another substance called PVDC. You can still use it in your plastic bag fusion though! Just put them in between two plastic bag layers.

      Thanks for visiting, taking the time to write, and thanks again for that great question!

  4. Wake O'Donnell

    One more thing: if I were to do this with garbage bags, how elastic would it be? What’s the best material to fuse for elasticity?

    1. Wake!!!! You’ve got so many great questions! 😀

      Garbage bags and those thick shiny shopping bags are a bit stretchier as they’re made of low-density polyethylene (LDPE). My plastic bags of choice are regular shopping bags which are made of high-density polyethylene (HDPE). They’re thin and crinkly. As you fuse more layers of plastic together the material will become thicker and more stiff. Neither plastic will be stretchy and springy like a rubber band or spandex, but the LDPE will definitely be more “elastic” than the HDPE.

      If you’re looking to make your bag stretchy, consider making plarn (plastic yarn) and using it to crochet or knit a bag instead of fusing. You can reference my t-shirt yarn tutorial to get an idea of how to cut one continuous strand of plarn (http://baokhangluu.com/how-to-cut-continuous-t-shirt-yarn/).

      If you do stay with fusing and you go with LDPE, you can use a cooler setting on your iron. Try your silk setting to start. 😀

      Thanks again for writing! I really appreciate!

  5. Wake O'Donnell

    Hey! Great article, I’m making a bag for my mom for Mother’s Day with this. A few questions though
    My iron doesn’t have a polyester or rayon setting. It has Fragiles, Nylon, Silk, Wool and Cotton. Which of these is closest?
    Asso how would I go about fusing two sheets together like a seam, as an alternative to sewing?

    1. Hi Wake, Great questions.

      Temperature settings for irons can be vastly different. You can try setting it to the middle of your dial which is silk. If that doesn’t fuse the plastic just set the dial higher to wool or cotton. Honestly, my iron hasn’t been heating up too well lately, so I set it all the way to the top setting of cotton. Make sure to keep the iron moving, otherwise you’ll end up with holey plastic rather than fused plastic!

      To fuse to sheets together to create a seam without sewing is almost as easy as using tape. Just lay strips of plastic over the seam and iron them on to keep the seam together. You’ll need to fuse several reinforcing layers to make sure the seam is secure. I also recommend reinforcing both the wrong and right side. Here’s a diagram.fused plastic seam

      I hope that helps!

      Thanks for visiting and thanks for taking the time to write!

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