Name: HDPE / PEAD RepRap PT - 1.75mm 500g - Natural
Brand: RepRap PT
SKU: HDPE175N5
Price: 20.0 EUR
Availability: InStock

Filament Produced in Portugal.

As it is an extremely difficult material to manufacture in filament, the diameter is 1.60mm by 1.85mm with high deviation.

Watch the following video from Sam:

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Thank you Sam for posting this video on youtube and share your experience!

It is a High Density Polyethylene:

Resistant to high temperatures;
High voltage resistance; compression; traction;
Low density compared to metals and other materials;
Waterproof;
Inert (to content), low reactivity;
Non-toxic
Little dimensional stability

Filament is extremely difficult to manufacture as it gradually shrinks after cooling. The softening temperature is between 110ºC and 130ºC.

For some projects it may be ideal, but it is the most difficult polymer to print as it shrinks very easily after the first layer, which implies a table at 100 or 110ºC. A diluted vinyl glue solution or a polypropylene board (some PP containers or CD covers) may solve the problem.

If you have never printed, before printing on HDPE you must use PLA or ABS.

This material is difficult to print and not recommended for beginners.

Do not touch the material after it has melted, this material maintains its temperature for longer, and touching this material while it is still hot can cause serious and deep burns!

Print settings may vary depending on the vendor. But if the material is not added, in general terms the temperatures work in a similar way.

Print Temperature: 200 to 250 ºC

Bed Temperature: 100 to 130 ºC

Print Speed: 20 mm/s

Cooling fan: at 100%.

For adhesion to the table, we apply PP packaging tape to the glass. in another test we used a PP plate from an old CD case.

In observation, the first test with the tape worked better as it transmitted heat better in the first layer. You can also print on paper or card.

Larger, longer objects will likely have more warping.

HDPE/HDPE physical properties

Property	Unit	ASTM	Value
Density (specific weight at 23°C)	kg/dm³	D792	0.941 - 0.965
Water absorption (24 ore,23°C, 3mm.)	%	D570	0 < 0.1

Thermal Resistance HDPE / PEAD

Property	Unit	Metod ASTM	Value
Limit of use in temperatures	C°		-50° a +80°
Melting (or softening) point	C°		130 - 135 (p.f)
Distortion Temperature - 18.6 kg/cm²	C°	D648	45 - 55
Distortion Temperature - 4.6 kg/cm²	C°	D648	60 - 85
Coeff. linear thermal expansion	10^-5cm/cm °C	D696	13
Thermal conductivity	10^-4cal/sec/cm²/° C/cm	C177	11 - 12.4
Specific heat	cal/° C/gr		0.55
Bed temperature	C°		60 a 110 (depende da dim. da base)
Extruder temperature	C°		210 a 230

Mechanical Resistance HDPE / HDPE

Property	Unit	Metod ASTM	Value
Rockwell	scale	D795	D60 - 70
Tensile strength	kg/cm²	D638	220 - 380
Elongation at break	%	D638	20 - 130
Elastic modulus of elasticity	kg/cm²	D638	4200 - 12500
Flexural elastic modulus	kg/cm²	D790	7000 - 20000
Compressive strength	kg/cm²	D695	190 - 250
IZOD impact resistance with notch at 23°C	kgcm/cm²	D256	2.5 - 100

HDPE/HDPE Electrical Property

Property	Unit	Metodo ASTM	Value
Volume resistivity (23° C - 50% RH)	ohm Ω/cm	D257	> 10¹⁶
Dielectric constant (10⁴ cicli)		D150	2.30 - 2.35
Dissipation factor (10⁴ cicli)		D150	< 0.0005

Property for HDPE/HDPE injection

Property	Unit	Value
Injection molding temperature	° C	200 - 280
Mold temperature	° C	50 - 70
Pressure	kg/cm²	800 - 1400
Injection speed		elevada
Mold Removal	%	1.5 - 3.5

Chemical Resistance HDPE / HDPE Value: + = Resistant / = Limited Resistance - = Not Resistant

Chemical agent	Val.	Chemical agent	Val.	Chemical agent	Val.	Chemical agent	Val.
Acetaldehyde	+	Chlorobenzene	/	Hydrogen peroxide	/	Potassium nitrate	+
Acetic acid	+	Chloroform	-	Hydrogen sulphide	+	Potassium permanganate	+
Acetone	+	Chromic acid	/	Lactic acid	+	Pyridine	+
Acrylonitrile	+	Citric acid	+	Magnesium chloride	+	Sea water	+
Allyl alcohol	+	Cyclohexanol	+	Mercury	+	Sodium carbonate	+
Aluminum chloride	+	Cyclohexanone	+	Methanol	+	Sodium chloride	+
Ammonia	+	Dibutyl phthalate	+	Methyl ethyl ketone	+	Sodium hydroxide	+
Ammonium chloride	+	Diesel fuel	+	Methylene chloride	/	Sulphuric acid	+
Aniline	+	Diethyl ether	+ a /	Mineral oil	+	Tallow	+
Benzaldehyde	+	Dioxane	+	Motor oil	+	Tetrahydrofurane	/ a -
Benzene	/	Ethanol	+	Nitric acid	+ a /	Tetralin	+
Benzyl alcohol	+	Ethyl acetate	+	Nitobenzene	+	Thionyl chloride	-
Bleach (Chlorine)	/	Ethylene diamine	+	Oleic acid	+	Toluene	/
Boric acid	+	Fluorine	-	Ozone	/	Transformer oil	+
Butanol	+	Formaldehyde	+	Perchloric acid	+	Trichlorethylene	+ a /
Butyl acetate	+	Formic acid	+	Phenol	+	Urea, aqueous	+
Calcium chloride	+	Furfurol	+	Phosphoric acid	+	Water	+
Carbon disulphide	/	Glycerine	+	Potassium chromate	+	Zinc chloride	+
Chlorine gas	/	Hydrochloric acid	+	Potassium hydroxide	+

NB: The values were obtained by testing the material at room temperature and may vary if

subjected to mechanical stress.

More information at the following link:

https://reprap.org/wiki/HDPE

http://www.pmtsrl.com/hdpe.htm

HDPE / PEAD RepRap PT - 1.75mm 500g - Natural

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