SLS Materials

SLS Materials

Duraform Polyamide

Duraform polyamide is ideal for creating highly durable engineering plastic models, using the SLS® Selective Laser Sintering process. Theses functional models have outstanding feature definition and surface quality. DuraForm polyamide is highly resistant to heat and chemical attack, and has been certified USP level VI for limited in-vivo exposure for use in prototype medical devices in surgery.

Features:

	Functional engineering plastic models
	Patterns for secondary tooling, processes where durable master patterns are required
	Excellent surface quality
	Outstanding feature definition
	Excellent heat and chemical resistance
	Machinable

Application Examples:

	Electronic, computer, and automotive enclosures
	Plastic automotive intake manifolds
	Wind tunnel models
	Medical device parts

DuraForm Polyamide Specifications

General Properties(1)

SI (English) Units

Test Method

DuraForm Polyamide

Specific Gravity, 20°C (68°F)

ASTM D792

0.97

Moisture Absorption, 23°C (68°F), 24 hr immersion

%

ASTM D570

0.41

Powder Density, Tap

g/cm3

ASTM D4164

0.59

Average Particle Size

Microns

Laser Diffraction

58

Particle Size Range, 90%

Microns

Laser Diffraction

25-92

Thermal Properties

Melting Point, Tm

°C (°F)

DSC

184 (363)

DTUL, 0.45 Mpa (66psi)

°C (°F)

ASTM D648

177 (350)

DTUL, 1.82 Mpa (264psi)

°C (°F)

ASTM D648

86 (187)

Mechanical Properties(2)

Tensile Strength at Yield

MPa(psi)

ASTM D638

44 (6400)

Tensile Modulus

MPa(psi)

ASTM D638

1600 (234000)

Tensile Elongation at Break

%

ASTM D638

9

Flexural Modulus

MPa(psi)

ASTM D790

1285 (186000)

Impact Strength

Notched Izod

J/m (ft-lb/in)

ASTM D256

216 (4)

Unnotched Izod

J/m (ft-lb/in)

ASTM D256

432 (8)

Surface Finish (Upper Facing)

As SLS Processed, Ra

µm (µ in)

8.5 (344)

After Finishing, Ra

µm (µ in)

0.13 (5)

Chemical Resistance

Alkalines, hydrocarbons, fuels, & solvents

Electrical Properties

Volume Resistivity

22º C, 50% RH, 500v

ohm x cm

ASTM D257-93

3.1E+14

Surface Resistivity

22º C, 50% RH, 500v

ohm x cm

ASTM D257-93

3.0E+14

Dielectric Constant

22º C, 50% RH, 5v, 1000 Hz

ASTM D150-95

2.9

Dielectric Strength

22º C, 50% RH, in air, 500 V/sec

v/mm

ASTM D149-95a
Method A

1.6E+4

Comparative Tracking Index

v

ASTM D5288-92
and/or IEC
Standard 112

585, TI-Cu,
<1mm depth

1 Results are based on volume distribution of particles
2 Data was generated from testing of SLS parts produced with regular DuraForm PA under typical processing conditions (new material, 4 watts laser power, 66 in/sec scan speed on a Sinterstation 2500)

Warranty/Disclaimer: The performance characteristics of this product may vary according to product application, operating conditions, materials combined with, or end use. Information about accuracies, tolerances, finish characteristics and other part properties is based on what skilled operators can attain in typical applications. Results may vary depending on a number of factors that include the specific application, part geometry, operator skill and experience, and adherence to DTM's recommended procedures. DTM makes no warranties of any type, express or implied, including, but not limited to, the warranties of merchantability or fitness for a particular use.

Castform PS

Castform PS is ideal for producing complex, investment casting patterns eliminating the time and expense associated with tooling. The patterns can be used when casting a variety of materials including aluminum, zinc, titanium, bronze and various alloys.

Features:

	Behaves much like foundry wax
	Low ash content
	Complex patterns without tooling
	Compatible with standard foundry practices

Application Examples:

	Aerospace control housings
	Automotive
	Household fixtures
	Industrial pump assemblies

Castform PS Specifications

General Properties(1)

SI (English) Units

Test Method

DuraForm Polyamide

Specific Gravity, 20°C (68°F)

ASTM D792

0.86

Moisture Absorption, 23°C (68°F), 24 hr immersion

%

ASTM D570

0.06

Powder Density, Tap

g/cm3

ASTM D4164

0.46

Average Particle Size ⁽²⁾

Microns

Laser Diffraction

62

Particle Size Range, 90% ⁽²⁾

Microns

Laser Diffraction

25-106

Thermal Properties

Glass Transition: Tg (polystyrene)

°C

DSC

89

Melt Point: Mp (Wax) °C <63

DTUL, 0.45 Mpa

°C

ASTM D648

33

DTUL, 1.82 Mpa

°C

ASTM D648

40

Physical and Mechanical Properties

Tensile Strength at Yield

kPa

ASTM D638
2840

Tensile Modulus

MPa

ASTM D638

1604

Notched Izod

J/m

ASTM D256

< 11

Unnotched Izod

J/m

ASTM D256

14

Surface Finish

As SLS Processed, Ra

µm
DTM 13

After Polishing, Ra

µm
DTM 3

Other

Flash Point (Polystyrene)
°C Cleveland Open Cup 350

Flash Point
°C Cleveland Open Cup >200

Ash Content % ASTM D482 0.02

Auto ignition Point (Polystyrene) °C 410

1 Data was generated from testing of SLS parts produced with Castform PS under typical processing conditions and wax infiltration with the J. Mac red Dip Wax #2-D504

2 Results are based on volume distribution of particles

Warranty/Disclaimer: The performance characteristics of this product may vary according to product application, operating conditions, materials combined with, or end use. Information about accuracies, tolerances, finish characteristics and other part properties is based on what skilled operators can attain in typical applications. Results may vary depending on a number of factors that include the specific application, part geometry, operator skill and experience, and adherence to DTM's recommended procedures. DTM makes no warranties of any type, express or implied, including, but not limited to, the warranties of merchantability or fitness for a particular use.

For More Information Contact:

Global Rapid Technologies, Inc.
22 Battey Drive, Greenville, RI 02828
Tel: (401) 949-5826
Fax: (401) 949-2137
Internet: sales@globalrapid.com

Send mail to admin@globalrapid.com with questions or comments about this web site.
Copyright © 2000 Global Rapid Technologies, Inc.

General Properties(1)	SI (English) Units	Test Method	DuraForm Polyamide
Specific Gravity, 20°C (68°F)		ASTM D792	0.97
Moisture Absorption, 23°C (68°F), 24 hr immersion	%	ASTM D570	0.41
Powder Density, Tap	g/cm3	ASTM D4164	0.59
Average Particle Size	Microns	Laser Diffraction	58
Particle Size Range, 90%	Microns	Laser Diffraction	25-92
Thermal Properties
Melting Point, Tm	°C (°F)	DSC	184 (363)
DTUL, 0.45 Mpa (66psi)	°C (°F)	ASTM D648	177 (350)
DTUL, 1.82 Mpa (264psi)	°C (°F)	ASTM D648	86 (187)
Mechanical Properties(2)
Tensile Strength at Yield	MPa(psi)	ASTM D638	44 (6400)
Tensile Modulus	MPa(psi)	ASTM D638	1600 (234000)
Tensile Elongation at Break	%	ASTM D638	9
Flexural Modulus	MPa(psi)	ASTM D790	1285 (186000)
Impact Strength
Notched Izod	J/m (ft-lb/in)	ASTM D256	216 (4)
Unnotched Izod	J/m (ft-lb/in)	ASTM D256	432 (8)
Surface Finish (Upper Facing)
As SLS Processed, Ra	µm (µ in)		8.5 (344)
After Finishing, Ra	µm (µ in)		0.13 (5)
Chemical Resistance
Alkalines, hydrocarbons, fuels, & solvents
Electrical Properties
Volume Resistivity
22º C, 50% RH, 500v	ohm x cm	ASTM D257-93	3.1E+14
Surface Resistivity
22º C, 50% RH, 500v	ohm x cm	ASTM D257-93	3.0E+14
Dielectric Constant
22º C, 50% RH, 5v, 1000 Hz		ASTM D150-95	2.9
Dielectric Strength
22º C, 50% RH, in air, 500 V/sec	v/mm	ASTM D149-95a Method A	1.6E+4
Comparative Tracking Index	v	ASTM D5288-92 and/or IEC Standard 112	585, TI-Cu, <1mm depth
1 Results are based on volume distribution of particles 2 Data was generated from testing of SLS parts produced with regular DuraForm PA under typical processing conditions (new material, 4 watts laser power, 66 in/sec scan speed on a Sinterstation 2500)