The most familiar use of thermosetting plastic is the heat-resistant handle on metal cookware. It is also used for bottle caps, knobs and handles, and laminated counter tops. Thermosetting plastics retain their shape and strength even when heated.
Thermoplastics can be repeatedly softened by heating and hardened by cooling. Thermosetting plastics, however, harden permanently after being heated once. An example of thermoplastic is polypropylene (PP - recycling number 5). An example of thermosetting plastic is polyurathane (PU).
They should not be cleaned in the kitchen sink and YES, it will harden in the drain.
Vulcanisation.
carbon,
the milk will harden and make plastic
Once casein is ready to be hardened, it is put into a tub of formaldehyde. The casein is then left to harden over a period of a few days.
There is almost no way to do this without destroying the plastic. As you didn't say WHAT KIND of plastic, it's hard to be more help.
A plastic which will soften when heated and harden when cooled.
Yes, it can, just don't add too much acetone.
leave it to harden and then scrape off using a plastic scraper to prevent scraping the floor.
metal and usally wood handle (+[_]::) 23
Yes, harden is a verb.
No. The word "harden" is a verb.
"Harden" is the present tense. Ex. I harden the the cement by allowing it to dry. The past tense is hardened. The future tense is will harden.
The present tense of "harden" is "harden." For example, "The clay hardens as it dries."
Thermosofting is the name of a plastic that has weak bonds between the molecules, so when the plastic is heated the bonds between the molecules break allowing the plastic to become soft. When the plastic is cooled again the forces between the molecules bring them back together. This causes the plastic to harden. I hope that's OK.