Friendly Plastic Can - 5.0 out of 5 stars from 1 customer reviewsShapelock: surprisingly strong, a little goes a long way, good for kids!
I heard about this as "Shapelock" and for whatever reason, the company decided to rename it "Friendly Plastic"
It's Polycaprolactone, Wikipedia has a great entry on it.
The pellets melt in 150F-160F water. This is hot enough to scald you but not cause a serious burn. I was afraid this would mean that kids wouldn't be able to play with it but in fact they can - within a minute or two of coming out of the hot water bath this stuff cools down enough that it's just warm. However it still remains pliable enough for kids to have a lot of fun.
When it does finally cool completely it's hard. I was used to Fimo/Sculpey which is really very weak. This stuff is really strong. Strong enough that I have yet to break a part which was fully cooled. I'd say it's as structural as the plastic in most kid's toys and actually a bit tougher (resistant to cracking) I believe there must be some crystallization going on. I made a device where the plastic acts as a...
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