How to 3D Print with PETG – Tips and Tricks for 3D Printing with PETG

3D Printing with PETG Filament

PETG is a short cut of Polyethylene Terephthalate Glycol, it sounds a little too complicated right? Well, to be honest, it's not as a big of a word as it seems. It's simply a member of the copolyester family. A modified polyester if you may say.

Read more: 3D Printer Filament Guide - Best 13 Type of Filaments.

Why PETG is becoming more and more popular in the market?

To sum it up in one word, the answer is "Properties"

PETG has an impressive resistance to impacting which is as good as that of polycarbonate.

Being ductile, having a high thermal and chemical resistance make it the choice to go in many industries from plastics and water or oil containers to pharmaceutical packing and even medical implants.

Another prevalence of PETG is in modern 3D printers. It's amazing how it's getting viral and definitely well earned.

Let's take a deeper look into PETG filaments and 3D printing.

Strength

Not only do PTEG filaments provide easy plastic printing, but once the plastic is allowed to harden, it's as rigid and strong as needed.

This makes it practical from a manufacturing point of view not to mention the variety of shapes and colors these little filaments will turn to, that never fail to attract customers making them stand out from a business or commercial perspective as well.

Flexibility

I know that this might seem to oppose the point discussed above but it really doesn't.
While PETG filaments possess a good range of flexibility, this doesn't at all compromise their strength. It's just the right balance of both.

S​hrinkage, Adhesion, And Warping

These filaments have a very low shrinkage rate.

The layering of PETG filaments is without a doubt a game-changing corner in 3D printing.

When you compare PETG to other filaments like for instance ABS, They are dramatically better in aspects like adhesion and cracking.

Not to mention they don't require much bed heat. They need minimum warping during printing making the entire process as flexible as can be.

Odor

While other filaments would have from slight to such an irritating odor, PETG has a light pleasant smell that is never actually repulsive; you can simply be in the same room PETG parts are chugged out.

Durability And Radiation Resistance

PETG is minimally affected by UV rays and copes better with sun exposure. It has better durability than most of the filaments on the market.
This is specifically an advantage if you are to use the printed objects outdoors.

Availability

You can find a variety of blends of PETG filaments in the market.

They have a wide range of colors even transparent shades which is a reason why they are replacing a lot of the filaments nowadays.
Names like CPE from ultimaker and nGen from colorfabb are just two sides to the same coin. They have PETG as their basic component.

We talked a lot about the advantages of PETG filaments, but there's always good and bad, right?

Here are some of the disadvantages that you want to take into consideration when using PETG filaments. 

Don't Store them for too long!

Unfortunately, PETG is quite hygroscopic. It sucks the moisture in the air and doesn't really tolerate humidity.

Get as much as you need for your current project and then get some more when you are about to start a new one.

Moneywise

YES! A basic PETG filament is probably pocket-friendly, however, that's not true when it's blended for extra strength or more coloring or printing quality.

In comparison to other filaments that are more common like ABS, the price is not an advantage.

Tearing

I mentioned above how PETG filaments have good bed adhesion but sometimes the surface tears a little. Also, cracks can rarely happen if the speed of the fan is stronger than it should.

A little tip: you may want to cover the build plate with something like a hairspray or so to avoid tearing. A glue stick could be used as well.

PETG Filament vs ABS/PLA

Do you wonder if you should use PETG or just go for other available types like ABS and PLA?

Let's do the math, shall we?

In scenarios where you are looking to print very large objects or materials to be used outdoors, PETG filaments are the way to go. Not to mention they are FDA approved for manufacturing food and drinks containers

Flexibility is also another strong motive to go after PETG as well as their chemical resistance to different acids and alkalis.

Last but not least, you should look for the best reputation. As weird as it might sound but like any other product, some manufacturers just ruin what could have been a good experience. Seek a brand that is well recognized and trusted.

Now you can enjoy a peaceful, problem-free printing.

Adam William
 

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