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Types of plastic

This topic contains 59 replies, has 42 voices, and was last updated by  Nina Tran 4 months ago.

12
Dave Hakkens davehakkens

Types of plastic

07/12/2015 at 18:25

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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In reply to: Types of plastic

dedicated
31/03/2017 at 15:59
22

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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In reply to: Types of plastic

dedicated
31/03/2017 at 16:01
20

Continues here

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In reply to: Types of plastic

helper
22/04/2016 at 14:21
13

@fremuth

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.

In reply to: Types of plastic

starter
13/04/2016 at 10:44
7

Check out this wiki page, it has some info about recycling different types of plastics, such as melting temperatures.

http://www.appropedia.org/Recyclebot

In reply to: Types of plastic

helper
13/04/2016 at 14:37
6

Hi Dave.

I’m doing my masters degree on Polymer Science. If you have some questions, ask me!

In reply to: Types of plastic

helper
04/07/2016 at 18:22
5

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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In reply to: Types of plastic

helper
22/02/2018 at 10:23
4

About identifying plastic types.

This is from “User’s Guide to Plastic”, a book that is used in plastic related education.

Identifying plastic types by burning.

Material – Type of fire – Odor
ABS – Yellow flame with black smoke, drips – Very characteristic for ABS
PA-Nylon – Blue flame with yellow top, melts and drips with transparent and very fluid drops – Burnt wood
PC-Polycarbonate – Yellow flame with smoke, melts and chars
PE-Polyeten – Blue flame with yellow top, transparant drops that burns – Candles
POM-Acetalplastic – Blue flame without smoke – Ammonia
PP-Polypropen – Blue flame with yellow top, swells and drips – Sweet/Wool
PS – Yellow flame, with black sooting smoke – Citygas (?)
PVC – Yellow flame with green edges, softens – Sulphuracid
SAN – Yellow with black sooting smoke

In reply to: Types of plastic

dedicated
04/04/2017 at 22:22
4

@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

In reply to: Types of plastic

helper
27/06/2017 at 09:35
3

Celophan is not a plastic-like matterial beacuse it is made from wood maybe you wanted to say Polyethylen.
PVC – is very toxic because Cl. When Cl contact with water (for example in Lungs) it will produce H-Cl – very toxic acid and will damage organs. thats why it is not recomended to work with PVC in DIY projects.

In reply to: Types of plastic

starter
26/04/2017 at 17:52
3

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?

In reply to: Types of plastic

new
14/10/2016 at 19:59
3

@marcelozp,

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.

In reply to: Types of plastic

helper
04/07/2016 at 20:38
3

@uaneme

Is very hard to work with PVC. mainly problem is the liberation of HCl wich is very harmful. To extrude PVC you will need a extrude with degasification (i don’t know if it’s a correct term in english).

In reply to: Types of plastic

starter
11/06/2016 at 03:24
3

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

In reply to: Types of plastic

helper
15/05/2018 at 21:14
2

@dustin88

Add uv blocker to your material

In reply to: Types of plastic

helper
21/11/2017 at 16:33
2

Hi marcelozp,
Am Moraa from Kenya. Am trying to work with PET plastics but i find it so brittle. What can you make out of it, the melting temperatures and any information that can help please.

Many thanks.

In reply to: Types of plastic

new
26/06/2017 at 19:44
2

Hello,

Newbie here to the forum. Very excited about the direction and goals of the members. I am not educated in the science of the various plastics or polymer chemical makeup. I have been chipping up many different forms of plastics and abs computer cases with an old Troy built Garden style wood chipper that I have modified. I have numerous 55 gallon drums of mixed plastic chips. I eventually want to build Dave’s shredder and also get into crumb rubber.

My question is about Pyrolysizing plastics. As you know applying heat to such things as plastic or rubber while held in a vacuum, will cause the material to break down and release a gas, BUT not burn because of no oxygen. That gas can be captured and depending on the material, can be condensed back into a liquid form such as oil. For example, cellophane. The gas can also be burned off, and with proper oxygen introduced, it will burn pretty clean and hot. HOWEVER, if that gas from some plastics or pvc is just allowed to escape out into the air, it can be very toxic. And by the way, the by-product is pure carbon black, which is a good thing to use or put back into the environment. My problem is not knowing enough about the different polymers in the various forms of plastics to know which chemicals are the real dangerous toxic ones, if allowed to escape. Because of your background education, could you possibly list the various plastics and the types of potential toxic chemicals they could produce if allowed to off-gas? Any educational information about these different types of plastics and the dangerous chemicals they could produce would be very much appreciated. @jtravis

In reply to: Types of plastic

warrior
04/04/2017 at 21:59
2

@mathijsstroober wow! Amazing work, thank you!
Have you got a melting temp for PS too? 😀

In reply to: Types of plastic

helper
05/07/2016 at 17:02
2

@uaneme
if you start to think, PVC is used when you need a long time application, like water pipe, so there is no need to recycle it.

In reply to: Types of plastic

helper
04/07/2016 at 19:27
2

Is there actually a safe way to recycle PVC? If yes, can it be done in a DIY manner?

In reply to: Types of plastic

starter
07/06/2016 at 10:16
2

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????

In reply to: Types of plastic

starter
21/04/2016 at 00:36
2

Hi Dave and @marcelozp

I can`t find much information about PET, are there any restrictions?
Here in Mexico there is PET every where.

In reply to: Types of plastic

starter
23/04/2019 at 13:27
1

Hello All,
A little help please. I am wanting to understand thermoplastics/thermosets and wonder if they can be recycled and reused with the precious plastic method.

 

Long story short, where I work we accumulate a lot of plastic toys and kitchenware – which I am told are generally made of thermoplastics and/or thermosets. I would really like to get the big boss on board with precious plastics in order to make a change to our plastic waste, but quickly realise I have no knowledge in this area.

 

Any help or information would be HIGHLY appreciated.

Thank you so much!! 🙂

In reply to: Types of plastic

new
13/02/2019 at 22:12
1

Just found this website with more information and thought that it might be of use to some people : https://www.boedeker.com/Technical-Resources/Technical-Library/Plastic-Identification

In reply to: Types of plastic

new
26/04/2018 at 14:48
1

What can be done to reduce UV degradation

In reply to: Types of plastic

new
25/04/2018 at 05:34
1

HDPE grind / flake / scrap

Hi im Stephen from Indonesia Plastic,
We are professional Plastic Supplier with experience more than 5 Years
Here are my product details :

Product
: HDPE regrind, Clean, not mixed

Available Colour
: Red, Blue, Yellow, Gold, Cream

Available Quantity / month
: 1000 Metric Tons

Regular Customer
: European and South American Countries

Size
: 10 – 12 mm or As Requested

Price
: 900 USD / MT, exwork Jakarta – Indonesia

Minimum Order
: 1 container / 25 MT

Contact Person
: Stephen, [email protected], +628 11 888 1140 ( Whatsapp Only )

Looking forward to hear good news from you.
Thank you.

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In reply to: Types of plastic

new
28/03/2018 at 16:03
1

@mathijsstroober,
Great ideas, Thanks again!! I’ll dig into some experiments 🙂

In reply to: Types of plastic

dedicated
28/03/2018 at 11:35
1

@plasticinabackpack
Meting PE bags in an regular oven is relatively safe to try with. Also ironing bags in many layers together can create stiff blocks of PE

In reply to: Types of plastic

dedicated
27/03/2018 at 21:04
1

@plasticinabackpack,
Unfortunately, it dense foam is made by thermossetting plastics and therefor not recyclable. It is not possible to make ‘foamy’ plastics with recyclable types.

HDPE does meet your requirements and is perfect for products like mallets, hammers etc

In reply to: Types of plastic

starter
25/01/2018 at 21:35
1

Does anyone have experience with shredding ABS from printers/copiers? jtravis recycled some of those ABS cases with a wood chipper but I wonder how well that goes with the precious plastic shredder. I have piles of it at my school but these things are quite hard. I suppose much depends on the power of the engine..

In reply to: Types of plastic

helper
24/01/2018 at 01:16
1

yes for sure you can!i have tried that with the injection and was fine!

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