YOUSU Polypropylene PP Filament, 1.75mm 3D Printer Filament for FDM 3D Printers, 1kg (2.2lbs) 5 Pcs Build Sheet Included, Semi-Flexible Ultra Tough Filament, White

This filament prints very well for polypropylene. The filament size is consistent, it extrudes easier, and it seems to adhere better than your usual roll of PP. They even provide a handful of sheets that you can stick to your build plate, which is likely a film also made from polypropylene. And no, you don't have to worry about the adhesive having a death grip or leaving behind tacky residue. I just want to make it's clear that this filament is pretty high quality, but there are some things that you should know about it first.Since you are also likely looking specifically for polypropylene, which is a pretty uncommon printer filament, I would assume you are also chasing after its unique resilient properties. Let me quell some of your concern and give you the details so you know what you're buying.Full transparency: I bought this roll of filament because my usual source of polypropylene was out of stock. Getting your hands on 1.75mm PP filament right now seems to leave you with very few choices. Usually all you can find is expensive international options or expensive gimmicky rolls with some sort of color or filler like carbon fiber.The bright white color of this polypropylene is a red flag since it is usually quite translucent. The full 1kg roll is also a concern since polypropylene is usually only sold in 0.7kg quantities. This has to do with the density of polypropylene being much lighter than PLA or ABS.After doing a print, I did indeed confirm this filament is denser than pure, raw polypropylene by about 13%, something that was not made clear in the listing at the time. Let me be clear, this is still lighter than PLA. I talked with the manufacturers about this since the part I printed was obviously heavier than a part printed with pure PP, and they were very helpful and patient with me.I was informed that, yes, this polypropylene is heavier than pure PP because of some of the additives. These additives are used to help the filament in all the ways I mentioned before, namely extrusion and bed adhesion. According to what they told me, this filament still retains the toughness, chemical resistance, and similar rigidity to pure polypropylene. I can attest that yes, the toughness and rigidity is very similar, but I am unsure about the chemical resistance. And even though they, and many other PP distributors say these material is food safe, I wouldn't EVER drink or eat off of a mystery plastic unless it's been through some kind of legitimate certification process, which I don't think exists for printer filament.One last note, this polypropylene also has the same layer adhesion just like pure PP, you just need to make sure you're printing at a high enough temperature to get those layers to really stick together. If you've never printed with PP before, the layer adhesion strength is amazing. It's almost like the part is completely homogeneous. Layer separation is quite difficult if not impossible to even forcefully induce in some cases. It'll be much stronger than PLA or ABS in this way. Maybe better than any other readily made printer filament.So in short, here's the pros and cons.Pros:-Actually consistent filament diameter. A lot of manufacturers say this but don't deliver. These rolls are actually good.-Slightly better bed adhesion than raw polypropylene (use their film or PP packing tape).-Better extrusion characteristics (didn't need to adjust or crank flow rate as much for a good print).-Comes with bed adhesion films so you don't have to hunt down tape or buy expensive adhesive.Neutral:-Denser than raw PP by 13~%, but take that number with a small grain of salt.-Opaque white color-Unknown additives that result in the above property changes.-Sweet print smell.Cons:-No obvious cons.Any of the neutral points could be considered cons, and for me, the extra density of the filament WAS a con, but it completely depends on what you need the filament for. If you do your due diligence and are looking at this review or others, you'll know more or less what you're getting, and how different this stuff will be from pure polypropylene.

This appears not to be a pure PP filament, other sources claim it is slightly denser than pure PP and has additives to make it easier to print... Well, whatever they are, they work!This filament has fairly typical PP bed adhesion issues, and it can, and will warp in certain situations, but it's remarkably easy to print and manage.Layer adhesion is incredibly strong, just like pure PP, and it produces a semi-flexible print, but it strings and ozzes very little and flows extremely well, even at moderately high speeds. This seems like a quality filament if you need the resilience and chemical resistance of PP, just a bit easier to print.Don't forget to check the bottom of the box for the included PP adhesion stickers. I use Magigoo on a textured PEI bed, so I haven't tried the stickers, but if you have a smooth bed it's nice that they include them.

Polypropylene is a specialty filament it takes knowledge to get to working properly regardless of the brand, however I've had poor experiences with other brands polypropylene to the point where I gave up on printing. On a whim I gave this brand a shot and it's been amazing. Requires a hot bed and specialized adhesive however once you learn it this stuff prints like a dream. parts come out strong flexible chemical and heat resistant, The stuff can even be dishwasher safe perfect for hydroponic towers. Some of my nicest benchies have come from this polypropylene. Take your time and do your research and if polypropylene is right for you and your project then you can count on this stuffAdhesions always going to be a problem unless you get specialty polypropylene adhesive. It likes to be printed relatively slow if you're struggling make sure you're printing it either in an enclosure or a very warm room any rooms with a strong draft such as a garage or with the window open is strongly not recommended. If you're using a non-heated enclosure acrylic or over sized cardboard box heat your bed to 80C for 30 minutes before you start printing, if using adhesive apply adhesive to cool bed allow it to dry then heat the bed to 80 for 30 minutes this will really set in the glue to give you the best adhesion

I was able to print with this filament using the supplied PP film. It comes with 5 pcs PP sticky sheets (I think they are 150*150 mm), which from my experience each one is only good for a single use since the print fuses with it and you essentially tear it when removing the print with part of it remaining on the print.Printing is feasible, I was able to print a 100mm long part. However, warpage is significant, and the only thing helping with it is the part literally fusing with the PP sheet, but the edges still get pulled a bit, the bottom of the print is not flat. And should be noted that I was printing on an enclosed printer with 45°C chamber temperature.

This is the best TPU filament I have ever bought. The quality is immense! I've bought probably every brand on Amazon and by far, this one is the best. The quality and flexibility you get with the finished print is exceptional. Great job guys and gals who created this TPU. My print settings were 225c at the head and 70c on the bed using a creality ender 3 pro.

Just right for our 3D printers. Kids liked them colors.

Craaazy warpage, even with an enclosure. I tried their supplied “sticky sheets” and while the filament does adhere very well to the sheet, the warpage was so powerful that it peeled the sticky sheet right off my build plate. I tried rafts, and brims, and every time I had to stop the print early due to insane warping. I was trying to make molds for forged-carbon parts, and the PolyPropylene would be great for this because the resin shouldn’t adhere to the mold with this filament, but there was no way to get a successful completed mold part. I’ll keep trying some other things but for now I’m leaving 1 star because it was a waste of money at this point.