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HR-PLA 3D870

Ref.: PLA-3D870-WHITE-175-1000

24.95 €

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Approximate delivery date: Thursday 26 December

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The PLA 3D870 is a material that presents a high general characteristics, comparable to ABS and in some aspect even superior, but maintaining the facility to be printed that has a conventional PLA.

The PLA 3D870 is based on the material developed by NatureWorks Ingeo, one of the most powerful PLA and most used in the world for 3D printing. This PLA stands out above others for having a softening temperature similar to ABS, for the high resistance to impact and for the increase of its mechanical properties when tempered. Tempering is a process that is carried out after performing 3D printing, in which the transformation of the molecular structure of the PLA from amorphous to crystalline takes place. In an amorphous state, the material has a disordered and irregular structure which can cause a series of weak points prone to generate failures and breakages. On the other hand, in a crystalline state, the PLA 3D870 is recomposed in a more ordered way, obtaining a more stable and smoother material at a microscopic level. This crystalline molecular form also helps the material to achieve a very high resistance to impact compared to the rest of PLA and much higher than that of ABS, thus being a suitable material for certain parts of industrial application.

The technique of tempering is usually not very effective in many plastics, in most causes a decrease in physical, mechanical or directly melting properties, but the PLA 3D870 does not happen that. After tempering the softening temperature, which is one of the weak points of the PLA because it has a low value (≈55ºC), increases to 85ºC, becoming a temperature very close to that of ABS. Another property that greatly increases its value, is the impact resistance, being double that in amorphous state and 5 times more resistant than ABS. In the following graphs PLA 3D870 is compared with l ABS and a conventional PLA in both amorphous and crystalline states

Image 1: HR-PLA 3D870 Heat Resistance

Image 2: HR-PLA 3D870 Impact Strength

The tempering necessary to strengthen this material is carried out in a simple way with any domestic furnace, no oven, apparatus or special or professional tool is necessary to do this post-processing. All the steps to execute this process are explained in the section of usage tips.

A major of all the above mentioned, the PLA 3D870 has another advantage in relation to its tonality, is resistant to the loss of color before UV rays and to become yellowish with the passage of time. Until the appearance of this material only the ASA maintained its tonality before the UV ray.

Can´t drill, paint or sanding as the ABS but is a more stable and easier to print plastic this. If you wish to obtain special surface finishes in HR-PLA 3D870 (1,75mm or 2,85mm) use coating designed specifically for 3D printing you'll find in the accessories category called XTC-3D. For higher yields of 3D printing is advisable to cover the bed of the printer with Magigoo, Blue Tape, BuildTak, or 3DLac you can find in the store fixtures.

Like all PLA plastics, the PLA 3D870 is a biodegradable material obtained from natural resources, specifically obtained from the starch extracted from corn, beet and wheat.

As a final conclusion, the PLA 3D870 is one of the most powerful materials for all types of users of 3D printers, both for its mechanical characteristics and the ease of printing it presents.

General information
Material	PLA
Format	50 g / 1000 g
Density	(D792) 1.22 g/cm³
Filament diameter	1.75 / 2.85 mm
Filament tolerance	± 0.10 mm
Filament length	(Ø 1.75 mm) ± 340 m / (Ø 2.85 mm) ± 128 m

Printing properties
Printing temperature	205 - 225 ºC
Print bed temperature	20 - 60 ºC
Chamber temperature	✗
Cooling fan	✓
Recommended printing speed	- mm/s

Mechanical properties
Izod impact strength	2.23 KJ/m²
Elongation at break	- %
Tensile strength	(ASTM D638) 40 MPa
Tensile modulus	(ASTM D638) 2865 MPa
Flexural strength	(ASTM D790) 73 MPa
Flexural modulus	(ASTM D790) 2414 MPa
Surface hardness	-

Thermal properties
Melting temperature	(D3418) 165 - 180 ºC
Softening temperature	60 ºC

Specific properties
Transparency	✗

Other
HS Code	3916.9
Spool diameter (outer)	200 mm
Spool diameter (inner hole)	53 mm
Spool width	70 mm

3D printing with HR-PLA 3D870 is simpler and easier than with ABS. It is not necessary that the printer dock is hot, but if possible it is recommended that the base is approximately 50-60 ºC, to prevent any small sign of "warping" appears. The extruder temperature must be between 190 and 220 ºC depending on the colour and 3D printer used. If your printer has a fan nozzle is recommended that you enable it for best results In the article from our blog of 3D printing is explained about the main doubts of 3D printing with PLA and ABS.

If you need to print very thin and tall pieces, you will see that the PLA plastic does not give you enough time to harden each layer, so that the piece will be as if it had melted. To solve this problem we give a very simple advice, printed at the same time at least 2 pieces, and place them in separate base. So while the extruder is moved from one piece to another, the plastic has time to harden each layer in achieving a better result.

The adhesion of the first layer is key and probably the most important factors for goods prints. So you can use Magigoo, Blue Tape, BuildTak or 3DLac.

It is also advisable to set the "raft" which is to create a first thick layer, and supports that will not suffer that contraction and on which is printed the piece. The disadvantage of using the "raft" is that this first layer will have a less smooth.
It is advisable to lower the density of "infill" parameter for the part to store less heat. As for the "brim" (the membrane that is created around the part) parameter is recommended never fit in greater thicknesses of 5mm to help the first layer does not come off.

As for the interior temperature where printed is recommended to be controlled and no drafts.

TEMPERED:

The tempering or rather, the crystallization process, is necessary to organize in an organized way the structure of the PLA 3D870 and achieve the maximum properties that this material can offer. The process is very simple, you only need a domestic oven (always preheated to the necessary temperature before introducing the piece), in which we are going to introduce the piece, which must remain attached to the base so that it does not deform. The piece should be as centered as possible in the oven compartment, so that the temperature is uniform throughout the piece, and without activating the fan. The ideal temperature for the process is 60ºC for 40-50 minutes for pieces with dimensions greater than 10x10x10 cm and for smaller pieces the time needed is less, about 20 minutes. After the indicated time, the oven is turned off and the door is opened to allow the piece to cool down little by little until it is completely cold. You must avoid touching the piece before it is completely cold, otherwise the piece will be permanently deformed.