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Types of plastic
- This topic has 62 replies, 43 voices, and was last updated 2 years ago by
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An overview of the different types of plastic, these are the most common ones. We mostly work with PP, HDPE, LDPE and PS. Just because we gather that the most from our waste here. However they should al work with our machines, just requires some (temperature) testing.
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Check out this wiki page, it has some info about recycling different types of plastics, such as melting temperatures.
http://www.appropedia.org/Recyclebot
Hi Dave.
I’m doing my masters degree on Polymer Science. If you have some questions, ask me!
Hi Dave and @marcelozp
I can`t find much information about PET, are there any restrictions?
Here in Mexico there is PET every where.
I’ve woeked for 2 years in a big company that recycle pet, almost 1 ton/hour.
It’s very easy but you have just one thing to care about.
First wash the bottles.
second wait to dry.
third shred then.
AND NOW THE MOST IMPORTANT: PET EASILLY RE-HYDRATES.
You need to pre-heat in a oven for 1 hour at70~80 ºC. To redry.
then you can process very well.
Hi,
it is very clear that i can use 6 or 7 types of plastic.
But when i see you making 3D filement i am confused!
When i talk about 3d printers with my frends that own one they use PLA of ABS plastic.
soo how could you get PLA or ABS filement for 3d printers????
Let’s get some real info about plastics together. I see each plastic page (ex. http://preciousplasticwiki.herokuapp.com/index.php?title=Pet) having it’s own section on melting temps, restrictions, etc.
http://preciousplasticwiki.herokuapp.com/index.php?title=Overview-plastic
This picture was adapted from: RUDIN and CHOI, The elements of polymer science and engineering, 3ed
This classification is based on enviromental and healthy problem during production, use and discard oh theses polymers.
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Yeah i feared for that… Lasercutting PVC is also a bad idea… There doesn’t seem to be any easy way to recycle that shit
Plastic crates, plastic pallets, PVC containers, pop-music of the past…
Most are made to last a long time, but still there is a lot of this stuff that’s damaged, broken and outdated. And no real solution to recycle it. This stuff also burns pretty good, and is easy to set on fire. And that’s not a good solution either.
Sorry but you are wrong. You can’t set PVC on fire. The Cl molecule makes it self extinguishable.
Hey !
Can anyone tell me that what steel wire to use for the line tie / bait harness. From what I’ve been able to find, .024 to .028 is the popular size, and torsion straightened steel is preferred, is that correct?
Thanks in advance!
We built an extruder and we’re trying to extrude PET. I have been told that it’s one of the more difficult plastics to recycle because it is very particular: it needs to be dried and preheated before melting and the temperature is very sensitive; it can’t be too low or too high.
We are building a new extruder with a longer barrel, about 40 inches (1m) long, so that we can make control temperature zones better and hopefully preheat and dry before we melt. I have a hunch that some people who have successfully extruded PET filament, actually reach melting temperature and then lower slightly before the extrusion nozzle. Do you or anyone else in this forum have any experience with this?
Another note: Re-filament uses only 90% recycled PET, while the other 10% is virgin PET. Apparently this makes it easier to bond the particles.
If anyone has experience in PET, please help us here.
Hi everyone can you please give me some tips of quantities to mix pet and hdpe to produce plastic wood since they are the two types of plastic that abound in my city.
@robksawyer the links you shared aren’t work. Can you share they again ?
Thank you
Unfortunately, spammers took over the site and I just didn’t have the time needed to manage it all. 🙁
Hi folks,
Made this overview of the six main types of plastics. It is still a bit in progress so let me know if there are any mistakes.
Remember this is a guideline: due to the many variations in one type of plastic the properties of one type can vary a lot.
Information retrieved from CES Edupack.
Hope it is useful!
When I need it, I will make more of those cards for other common plastics (ABS, PLA, PC etc)
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@mathijsstroober wow! Amazing work, thank you!
Have you got a melting temp for PS too? 😀
@flo-2 there is none. For plastomeres (type of plastic) you have the amorphous type and the semi-crystalline. Amorphous types do not have a melting point, only a point were it is getting softer. I can explain more if you want but you can also google for amorphous plastics
@mathijsstroober: Wow, thanks for sharing that. Seems like very valuable knowledge for a plastics newbie like me 😉
Appreciate that you shared it.
@mathijsstroober Excellent work!!! it is very useful who dont know about plastic.
this article is a good start to me. 🙂
I’m planning to recycling wasted plastic bag from PE plastic but my question is How can I define between LDPE and LLDPE to make masterbatch for PE extrution film? Or just blended them?
There are different types of plastics comes in market. These plastics are actually used in creating 3D filaments. A different plastic is used to create the different type of filament-like ABS, PLA or PET.
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