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Liqcreate Flame Retardant HDT resin 0.25 kg

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Liqcreate Flame Retardant HDT resin

Ref.: LIQC-FRHDT-250

46.95 €

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Approximate delivery date: Friday 27 December

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The Flame Retardant HDT resin from the Liqcreate catalog of engineering 3D printing resins is a rigid (Shore 88-89 D) off-white photopolymer compatible with most open-material SLA, DLP and LCD 3D printers in the 385-420 nm range. The FR HDT resin's key features are its high temperature resistance and self-extinguishing properties (UL 94 V0).

Electronics components 3D printed with the FR HDT resin

Image 1: Electronics componnets 3D printed with the FR HDT resin. Source: Liqcreate.

The Flame Retardant HDT resin has very high heat deflection temperature. The HDT-A (@ 1.80 MPa) of this material when UV-cured at 60 ºC for 60 minutes is 137 ºC and up to 145 ºC when cured for 120 minutes. The HDT-B (0.45 MPa) of of parts UV-cured at 60 ºC for 60 minutes is 237 ºC and it can reach even 257 ºC when cured twice as long.

Video 1: A burn test on the FR HDT resin. Source: Liqcreate.

Thanks to the high heat deflection temperature and flame retardant properties of this material, parts 3D printed with the Flame Retardant HDT resin are ideal for applications in the automotive industry (interior parts), in airplanes, trains and electronic devices. Another potential application would be tooling, covers, housings, etc.

Curing, washing, and sintering properties
Washing time	4-5 min
Curing time	-
Curing temperature	- ºC

General information
Manufacturer	Liqcreate
Material	Photopolymer
Format	0.25 kg / 1 kg
Technology	SLA / LED-LCD / DLP
Wavelength	385-420 nm
Viscosity	2800 mPas.s @ 25 ºC
Density (solid)	1.18 g/cm³

Printing properties
Layer height	25-100 µm
Layer exposure time	-
Layer off time	-
Lifting height	- mm
Bottom layer exposure	-
Bottom layer count	-

Mechanical properties
Izod impact strength	(ISO 180) 1.74 KJ/m² / 1.85 KJ/m²
Charpy impact strength	- KJ/m²
Elongation at break	(ASTM D638M) 1-3 % / 1-3 %
Tensile strength	(ASTM D638M) 41 MPa / 43 MPa
Tensile modulus	(ASTM D638M) 4200 MPa / 4200 MPa
Flexural strength	(ASTM D790) 73 MPa / 67 MPa
Flexural modulus	(ASTM D790) 4300 MPa / 4400 MPa
Surface hardness	(ASTM D2240) Shore 88 D / 89 D

Thermal properties
Softening temperature	237 ºC
Flammability classification	(UL 94) V0 @ 3.0 mm
Heat deflexion temperature	(ISO 75) @ 0.45 MPa: 237 ºC / 257 ºC / @ 1.8 MPa: 137 ºC / 145 ºC

Specific properties
Maximum water absorption	(D570-98) 0.41 %

Other
HS Code	2916.1
Lifetime (since manufacturing)	- M

The Liqcreate resin bottles should be stored in a clean and dry environment, out of direct sunlight and in a temperature of 5-30 ºC. Before use, the resin bottle should be shaken energetically for at least 1 minute (at least 3 minutes in the case of filled resins). Once shaken, the resin should be left to rest for around 10 minutes to let the air bubble escape. Leftover resin can be poured back into the bottle but it should be first filtered to ensure there is no polymer residue present. Safety equipment such as protective garments, gloves and face protection is highly recommended for the handling of resin.

The post-processing workflow for the FR HDT resin is quite user-friendly. First, the 3D printed part has to be cleaned in Liqcreate Resin Cleaner, IPA alcohol or bioethanol, preferably ultrasonic or under agitation. Then the completely dried part has to be cured in a high-power UV curing chamber. The curing workflow is explained in detail by the manufacturer here. It absolutely crucial that the parts are dry before they are cured. The curing of wet or sticky parts will lead to mechanical and surface defects. The drying can be done by simply leaving the cleaned part in a well ventilated area for at least 30 minutes or with the help of pressurized air (2 minutes) for parts cleaned in IPA alcohol or ethanol.

More useful resources such as tips on how to use support structures with the Liqcreate resins, or on how to color, age or mix the resins can be found on the Liqcreate support page. Furthermore, the manufacturer provides useful tips on working with the FR HDT resin in this article.