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Technology

Stereolithographie SLA

For SLA 3D printing, a liquid resin (photpolymer) is cured by a laser layer by layer.

In stereolithography (SLA), a liquid resin, a photopolymer, is cured layer by layer in a vat using a laser (UV light). After each layer, the print bed is lowered slightly and the next layer is solidified.

SLA is suitable for very small, fine components with smooth surfaces, high accuracy and tight tolerances. It can also produce highly transparent components like hardly any other technology.

Suitable materials

ACCURA 25

3D-Druck-Materialien-Jellypipe-Platzhalter-Bild

Features:

  • Density [g/cm3] 1.2
  • Tensile strength [MPa] 38
  • E-modul [Gpa] 1.66
  • Flexural strength [MPa] 58
  • Flexural modulus [Gpa] 1.66
  • Impact resistance (Izod notched) [J/m] 24
  • Heat deflection temp @0.45MPa [°C] 58
  • Elongation at break [%] 20

Advantages:

  • high flexibility with excellent restoring force
  • excellent detail resolution and precision
  • good bending strength
  • high shock resistance
  • Temperature resistance
  • smooth surface
  • very good paintability

The material ACCUR 25 is convincing due to its high detail resolution and at the same time high bending and impact resistance. In addition, the parts in this material have a smooth surface and can therefore be easily painted.

ClearVue transparent, 3D printed plastic

For applications where transparency is of crucial importance.

3D-Druck-Material-Xtreme-Technologie-SLA-Jellyipe-Ans1

Features:

  • Density [g/cm3] 1.17
  • Tensile strength [MPa] 53
  • E-modul [Gpa] 2.5
  • Flexural strength [MPa] 83
  • Flexural modulus [Gpa] 2.33
  • Impact resistance (Izod notched) [J/m] 46
  • Heat deflection temp @0.45MPa [°C] 51
  • Elongation at break [%] 6

Material color: 

  • Translucent

Applications:

 

Headlights
Complex assemblies

Advantages: 

  • Translucent and high clarity
  • Excellent moisture resistance
  • USP Class VI compliant
  • Biocompatible and dental compliant
  • Polycarbonate-like properties

ClearVue is a highly clear plastic with excellent moisture resistance. This material is suitable for a wide range of applications where transparency (translucency) is of crucial importance. These would be for example headlights, complex assemblies or fluid flows.

EVOLVE

3D-Druck-Materialien-Jellypipe-Platzhalter-Bild

Features:

  • Density [g/cm3] 1.12E-modul [Gpa] 2.96
  • Flexural modulus [Gpa] 2.65Impact resistance (Izod notched) [J/m] 38.9
  • Heat deflection temp @0.45MPa [°C] 52
  • Elongation at break [%] 11Shore hardness 82D

GP PLUS

3D-Druck-Materialien-Jellypipe-Platzhalter-Bild

Features:

  • Density [g/cm3] 1.16
  • Tensile strength [MPa] 37
  • E-modul [Gpa] 2.51
  • Flexural strength [MPa] 67.3
  • Flexural modulus [Gpa] 2.2
  • Impact resistance (Izod notched) [J/m] 26
  • Heat deflection temp @0.45MPa [°C] 46
  • Elongation at break [%] 7.5Shore hardness 79D

LOCTITE® IND 408, plastic 3D printing

For 3D printed parts with isotropic properties

LOCTITE® IND 408, plastic 3D printing

Features

  • Tensile strength: 42 MPa (ASTM D638)
  • Modulus of elasticity: 3240 MPa (ASTM D638)
  • Elongation at break: 1.3 % (ASTM D638)
  • Flexural strength: 144 MPa (ASTM D790)
  • Flexural modulus: 3830 MPa (ASTM D790)
  • Impact strength (IZOD, notched): 16 J/m (ASTM D256)
  • Hardness: Shore 80D (ASTM D2240)
  • Heat deflection temp (at 0.46 MPa): 118 °C (ASTM D648)
  • Heat deflection temp (at 1.82 MPa): 95°C (ASTM D648)

Material Color

Black

Surface

Excellent surface finish

Advantages

  • For parts with isotropic properties
  • For parts with high detail accuracy

 

Loctite 3D IND408 is ideally suited for the rapid production of parts with high detail and excellent surface finish for applications ranging from general purpose to end-use parts.

NEXT

NEXT

Features

  • Density [g/cm3] 1.17
  • Tensile strength [MPa] 32.8
  • E-modul [Gpa] 2.43
  • Flexural strength [MPa] 69.3
  • Flexural modulus [Gpa] 2.47
  • Impact resistance (Izod notched) [J/m] 50
  • Heat deflection temp @0.45MPa [°C] 56
  • Elongation at break [%] 9Shore hardness 82D

Advantages

  • Properties similar to ABS
  • high strength
  • high hardness
  • Appearance and surface of a thermoplastic

 

This material comes very close to the properties of ABS and therefore has a high strength and hardness.

Resin Flexible

3D-Druck-Materialien-Jellypipe-Platzhalter-Bild

Features

  • Density [g/cm3] 1.2
  • Tensile strength [MPa] 8.9
  • Elongation at break [%] 120Shore hardness 80A

RR60 white, Kunststoff 3D-Druck

Tough, optically neutral white, dimensionally stable resin specific for parts requiring high detail.

 

3D-Druck-Rohrverbindung-Material-Kunststoff-RR60-white

Features

  • Tensile strength: 54 MPa (ASTM D638)
  • Modulus of elasticity: 2920 MPa (ASTM D638)
  • Elongation at break: 4-6% (ASTM D638)
  • Flexural strength: 85 MPa (ASTM D790)
  • Flexural modulus: 2670 MPa (ASTM D790)
  • Impact strength: 18.6 J/m (ASTM D256)
  • Hardness: Shore 81D (ASTM D2240)
  • Heat deflection temp (at 66psi): 54 °C (ASTM D648)
  • Heat deflection temp (at 264psi): 50 °C (ASTM D648)

Material Color

White

Applications

For 3D printed parts that require a high level of detail

Advantages

All-rounder material

 

EP-RR 60 WH white is a tough, optically neutral white, dimensionally stable resin with low viscosity. The all-rounder material is suitable for various parts, specifically for parts that require high attention to detail.

RR60-crystal clear, plastic 3D print

For applications that require translucency and have a dimensionally demanding design.

 

3D-Druck-Rohrverbindung-Material-Kunststoff-RR60-crystal-clear

Features

  • Tensile strength: 52 MPa (ASTM D638)
  • Modulus of elasticity: 2500 MPa (ASTM D638)
  • Elongation at break: 6-10% (ASTM D638)
  • Flexural strength: 82 MPa (ASTM D790)
  • Flexural modulus: 2000 MPa (ASTM D790)
  • Impact strength: 21.4 J/m (ASTM D256)
  • Hardness: Shore 83D (ASTM D2240)
  • Heat deflection temperature (at 66psi): 55 °C (ASTM D648)
  • Heat deflection temperature (at 264psi): 50 °C (ASTM D648)

Material Color

Translucent

Applications

Applications requiring translucency
For demanding constructions

Advantages

  • Tough
  • Dimensionally stable

 

RR 60 CR is a crystal clear, tough, dimensionally stable resin made from an ABS-like material. For applications that require translucency and have dimensionally demanding construction.

Taurus

High stability and temperature resistance

3D-Druck-Materialien-Jellypipe-Platzhalter-Bild

Features

  • Density [g/cm3] 1.13
  • Tensile strength [MPa] 46.9
  • E-modul [Gpa] 2.31
  • Flexural strength [MPa] 73.8
  • Flexural modulus [Gpa] 2.05
  • Impact resistance (Izod notched) [J/m] 47.5
  • Heat deflection temp @0.45MPa [°C] 62
  • Elongation at break [%] 17Shore hardness 83D

Advantages

  • High stability
  • Temperature resistant
  • Heat resistant up to 90°C
  • Good surfaces

 

When it comes to components with high stability and temperature resistance, the Taurus material is perfect for these applications.

Xtreme

Sehr zähes Material mit ausgezeichneter Oberflächenqualität

3D-Druck-Material-Xtreme-Technologie-SLA-Jellyipe-Ans1

Features

  • Density [g/cm3] 1.18
  • Tensile strength [MPa] 38-44
  • E-modul [Gpa] 1.98
  • Flexural modulus [Gpa] 2.07
  • Impact resistance (Izod notched) [J/m] 52
  • Heat deflection temp @0.45MPa [°C] 62
  • Elongation at break [%] 22

Applications

Master patterns for vacuum casting

Advantages

  • Excellent surface quality
  • Good elongation at break properties  
  • High shock resistance
  • High stability
  • Similar properties to cast plastic

 

Accura's Xtreme material is particularly impressive with its excellent surface quality, good elongation properties, high impact resistance and high stability. In terms of appearance and surface finish, Xtreme corresponds to a durable cast plastic.

Frequently asked questions about SLA 3D printing

What is stereolithography (SLA)?

SLA is a 3D printing process in which liquid resin is cured layer by layer with a laser. It delivers very fine details and smooth surfaces.

What is SLA suitable for?

SLA is suitable for rapid prototyping and functional prototypes, small series, model making, presentation models such as demonstration or exhibition models, and design objects.

How large can SLA components be?

The maximum build space is 650 x 750 x 550 mm.

Can SLA produce transparent components?

Yes. Materials such as ClearVue or RR60 crystal clear can be used to produce highly transparent or translucent components, for example for headlights, complex assemblies or visible fluid flows.

Does SLA require support structures?

Yes. To prevent overhanging structures from sinking into the liquid resin, support structures are printed and removed after printing.

How are SLA components post-processed?

After the support structures have been removed, the components are post-cured under UV light in an exposure chamber. If required, they can then be sanded, painted and/or polished.

Which materials are available for SLA?

The options include ACCURA 25, ClearVue, EVOLVE, GP PLUS, LOCTITE IND 408, NEXT, Resin Flexible, RR60 white, RR60 crystal clear, Taurus and Xtreme – from ABS-like to flexible and transparent.

What is the difference between SLA and DLP?

In SLA, a laser cures the resin step by step. In DLP, the entire print surface is cured simultaneously with UV light sources. This makes DLP faster and particularly suitable for series production.

Note about material properties

Note: Please note that the listed values of the properties (e.g. tensile strength) refer to the properties of the material in an unprocessed state. Hoffmann AM can not guarantee the information below. In the printed state, the values may deviate from the specifications.

If a material in practice is pushed to the limits of the stated values, the component itself should be tested. If you have any questions, please do not hesitate to contact us.