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Topic: Does Felt Melt ?  (Read 7301 times)
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« on: November 13, 2008 11:20:42 AM »

Hi there!

So.. I'm wanting to make some rice hot/cold bags for boo-boo's and aches and pains. I am going to make a pouch from an old bed sheet to put the rice in and sew it up. BUt I am also going to make a removable cover.. if I made the cover out of felt craft squares for the appliques.. when I put it in the microwave.. will the felt melt???  Huh I'm hoping someone knows the answer so I don't have to experiment! what about fleece???

« Reply #1 on: November 13, 2008 11:27:34 AM »

I'm thinking that would melt... isn't it acrylic?

I think fleece is good. That's what my MIL uses to cover hot water bottles...

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« Reply #2 on: November 13, 2008 02:08:44 PM »

Craft felt may melt, because it's acrylic...overall, it just wouldn't hold up as well.  Real cotton terry cloth may be a good option, or cotton flannel.

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« Reply #3 on: November 14, 2008 07:43:02 AM »

Any man made fiber is capable of melting in the microwave. Natural fibers are best for your particular project. I really like the idea of felt cover, just go with wool felt instead Smiley
« Reply #4 on: November 14, 2008 02:02:42 PM »

I am going to make a pouch from an old bed sheet to put the rice in and sew it up. BUt I am also going to make a removable cover

Since the cover is going to be removable, I think the easiest thing would be to remove it before you heat the rice pouch. Cheesy

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« Reply #5 on: November 14, 2008 02:51:59 PM »

Another thing to consider about these bag covers is washability. The main reason I use a cover is so that I can wash the fabric that touches the skin. I don't think felt, especially craft felt, would be the best choice for washability.

FWIW, I always take the little pillowcase off my corn bags when I heat them, even though I used cotton material.

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« Reply #6 on: November 21, 2008 01:31:14 PM »

Look at your iron:  see how the "acrylic" setting is way low compared to the "wool" setting or even the "cotton" setting?

Acrylic (i.e., craft felt) will melt when exposed to high temperatures.  My heating pads are ensconced with cotton fabric.  I have no experience with heating acrylic in the microwave.  Microwaves are tricky beasts...Sorry!

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« Reply #7 on: December 20, 2008 01:16:53 PM »

craft felt will melt because it is made from recycled plastic bottles if you look at the bolts of craft felt at joanns they actually say that.  fleece will melt to if you put a hot iron on it.
« Reply #8 on: December 20, 2008 05:56:37 PM »

I made one with flannel that holds up fine in the microwave (though that was expected...).  It's only like 3"x3", for putting on specific owwie spots, like if I sleep on my neck funny.

My ex-roommate had a regular-sized one that her friend made for her that was made of fleece, and she used that thing almost every night (bad ankle) and it never did anything funny in the microwave.

I think any of it *should* be safe for the microwave, because microwaves don't actually get hot, they work by exciting the water molecules in your food, and there shouldn't be any water molecules in your fabric, which means the fabric would only melt if you heated the rice so hot that the rice melted the fabric, which would be definitely too hot for booboos!  (Mom explained this to me the day she brain-farted and put petroleum jelly in the microwave to melt it, then when nothing happened she felt dumb, because she knew all this stuff all along.  She wanted to dip cotton balls in the jelly to make fire starters for a camping trip.  Setting the jar in a dish of water in the microwave ended up working quite well  Roll Eyes)

You could test a scrap of fabric to see if it's microwave-safe using the same method for testing whether a dish is microwave-safe.  I'm sure you can find instructions for that online; I've never tried it but I've read instructions somewhere... like you put the thing to be tested in the microwave, and you put a little water (like a cup or so) in a container of known-safeness, like a glass measuring cup, in the microwave next to it.  Then you turn the microwave on for like 30 seconds or so.  Then feel both.  If the water is warmer, the item is microwave safe; if the item is warmer than the water, then it's not microwave safe.

But google that and double-check me on the amount of water and the time/power setting to use  Wink
Ha, found a link (albeit not a very good one): http://www.wikihow.com/Test-if-a-Dish-Is-Microwave-Safe
« Last Edit: December 20, 2008 06:19:49 PM by gimmemoresalad » THIS ROCKS   Logged
« Reply #9 on: December 20, 2008 06:13:36 PM »

there shouldn't be any water molecules in your fabric

Yes, but, have you ever melted a plastic take-out container?

Both acrylic (craft felt) and polyester (fleece) are types of polymers, i.e., turn into plastic.  So just 'cuz polar fleece is fine doesn't mean felt will be. 

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