| HS Code | 896841 |
| Color | Translucent amber |
| Chemistry | Photopolymer elastomer |
| Shore A Hardness | 70 |
| Tensile Strength | 6.2 MPa |
| Elongation At Break | 250% |
| Tear Strength | 25 kN/m |
| Compression Set | 20% |
| Resilience | 60% |
| Density | 1.08 g/cm³ |
| Viscosity | 1,500 cP at 25°C |
| Curing Wavelength | 385 nm |
| Biocompatibility | ISO 10993-5, ISO 10993-10 |
| Sterilization | Autoclave, ETO, Gamma |
| Shelf Life | 12 months |
| Storage Temperature | 15-25°C |
As an accredited Adaptive3D Soft ToughRubber™ Elastomer for DLP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Adaptive3D Soft ToughRubber™ Elastomer for DLP is packaged in a sealed, light-blocking 1 kg amber bottle with secure screw cap. |
| Container Loading (20′ FCL) | Container loading (20′ FCL): Adaptive3D Soft ToughRubber™ Elastomer for DLP, palletized and secured for safe, compliant ocean transport. |
| Shipping | Adaptive3D Soft ToughRubber™ Elastomer for DLP is typically shipped as a non-regulated liquid under DOT/IMDG/IATA in normal packaging. Transport in original, sealed, labeled containers at ambient temperature, protected from sunlight and heat. Always follow the current SDS, carrier rules, and local dangerous-goods regulations. |
| Storage | Store Adaptive3D Soft ToughRubber™ Elastomer for DLP in its original, tightly sealed, opaque container, upright, in a cool, dry, well-ventilated area. Protect from direct sunlight, UV light, heat, sparks, and ignition sources. Maintain 15–30°C; do not freeze. Keep away from moisture, incompatible materials, foodstuffs, and children. Keep container closed when not in use. Observe shelf life and use within recommended period. |
| Shelf Life | Shelf life is 12 months from manufacture when stored sealed in original container, protected from light, heat, and moisture. |
The resin vat temperature window, rather than print speed, controls compression set in custom diabetic orthotic insoles operating on a 405 nm DLP cell with a 4K DMD and a fluorinated ethylene propylene release film. Vat temperature is held at 23–25 °C; below 21 °C, the viscosity increase requires an additional 0.3 s exposure per layer, and above 28 °C the release film can wrinkle and generate layer-shift defects. The formulation addition ratio is 100 wt% Soft ToughRubber™ Elastomer as supplied, 0 wt% reactive diluent, 0 wt% plasticizer, 0 wt% filler, and 0 wt% amine-based adhesion promoter; even 0.1 wt% tertiary amine accelerator shortens vat pot life and increases gel particle formation on the release film. The downstream production process converts a foot scan into a lattice orthotic with regional hardness targets of 55 Shore A to 70 Shore A, exposed at 50 µm layers for 1.2–1.8 s per layer at 8–14 mW/cm². After printing, parts are washed in tripropylene glycol monomethyl ether for 15 minutes at 30 °C, rinsed in 99.9% isopropanol for 3 minutes, and dried in forced air at 40 °C for 30 minutes; if ambient relative humidity exceeds 60%, drying is extended by a further 15 minutes to prevent surface tack. Post-curing in a 405 nm UV chamber at 20–30 mW/cm² for 60 minutes drives residual acrylate conversion and stabilizes compression set. Compliance anchoring for skin-contact orthotics cites ISO 10993-5:2009 for cytotoxicity, ISO 10993-10:2010 for skin sensitisation, ASTM D2240-15e1 for durometer, ASTM D412-16 for tensile stress-strain, and ASTM D395-18 Method B for compression set at 70 °C. Terminal product types produced in this segment include custom diabetic insoles, metatarsal pads, and arch-support inserts.
For an outdoor telecommunication enclosure gasket with a 1.2 m perimeter, the production cell replaces compression-moulded EPDM with DLP-printed Soft ToughRubber™ Elastomer loaded at 100 wt%. The formulation addition ratio remains 100 wt% resin, 0 wt% plasticizer, 0 wt% filler, and 0 wt% external curative; no sulfur or peroxide cure system is added because the part is solidified by digital light exposure rather than by vulcanization kinetics. The downstream production process builds the gasket at 50 µm layer thickness on a 385 nm DLP machine with a 320 × 200 × 150 mm build envelope; the flat cross-section is oriented at 15° from horizontal to reduce peel force at the release interface. Washing in tripropylene glycol monomethyl ether for 12 minutes at 28 °C removes uncured resin from the sealing ribs; a second bath of 99.9% isopropanol for 5 minutes clears residual solvent. Drying at 45 °C for 45 minutes precedes post-cure at 405 nm, 25 mW/cm², for 60 minutes under nitrogen to reduce surface tack. The gasket is then assembled into an IP-rated enclosure and acceptance follows ASTM F36-99 for compressibility and recovery, ASTM F37-06 for sealability, ASTM D395-18 Method B for compression set at 70 °C, and IEC 60529 for ingress protection. The installed part classes produced in this segment are outdoor telecom cabinet gaskets, battery enclosure access-cover gaskets, and HVAC filter seals.
Impact protection pads manufactured for European motorcycle limb protectors are not produced by injection moulding; the production cell builds a digitally graded lattice directly from 100 wt% Soft ToughRubber™ Elastomer resin. The formulation addition ratio is 100 wt% photopolymer resin, 0 wt% chemical blowing agent, 0 wt% plasticizer, and 0 wt% thixotropic filler; energy absorption is controlled by lattice volume fraction rather than additive loading. The downstream production process uses a 385 nm DLP unit with a 7.6 µm pixel pitch and 50 µm layer thickness; lattice volume fraction is set between 25% and 35% to meet EN 1621-1:2012 Level 1 transmitted force limits. Peel force management is critical, so a 10° build-plate tilt and an oxygen-permeable polydimethylsiloxane vat floor reduce delamination at high lattice surface area. Washed parts move through tripropylene glycol monomethyl ether at 30 °C for 20 minutes, then 99.9% isopropanol for 4 minutes, and post-cure at 405 nm, 30 mW/cm², for 70 minutes. The printed pad is inserted into a textile carrier without adhesive; mechanical retention is provided by lattice interlocking. Compliance standards include EN 1621-1:2012 for joint protectors, EN 1621-2:2014 for back protectors, ASTM D412-16 for tensile properties, and ISO 34-1:2015 Method B for tear strength. Final assembled articles under this route include motorcycle limb protectors, equestrian body-protector pads, and skate helmet comfort liners.
In a custom prosthetic socket liner workflow, the resin is printed into a 3 mm-thick perforated cushion with 50 µm layers on a 405 nm DLP platform. The formulation addition ratio is 100 wt% Soft ToughRubber™ Elastomer without latex, plasticizer, or anti-tack additive; no post-cure plasticizer is introduced because residual plasticizer elevates migration kinetics into skin-contact tissue. Downstream production includes washing in tripropylene glycol monomethyl ether for 10 minutes at 30 °C, ultrasonic agitation at 40 kHz, rinsing in 99.9% isopropanol for 5 minutes, and vacuum drying at 40 °C for 45 minutes. Post-curing under nitrogen at 405 nm, 25 mW/cm², for 60 minutes reduces unreacted urethane acrylate migration. Biocompatibility assessments follow ISO 10993-5:2009 for cytotoxicity, ISO 10993-10:2010 for sensitisation, ISO 10993-23:2021 for irritation, and ISO 13485:2016 for quality management. The material is not validated for long-term mucosal contact or permanent implant use; published data for this specific configuration is limited. Terminal product types include prosthetic socket liners, orthotic cushioning pads, and negative-pressure wound therapy interface cushions.
Because a pneumatic soft robotic gripper handles injection-moulded parts with raised ejector-pin marks, the elastomer must provide isotropic tear resistance that does not drop along the build direction; the production cell therefore prints the bellows in one piece from 100 wt% Soft ToughRubber™ Elastomer at 50 µm layers. The formulation addition ratio is 100 wt% resin, 0 wt% fumed silica, 0 wt% carbon black, and 0 wt% process oil; fillers are excluded because they increase viscosity in the vat and reduce interlayer UV penetration. The downstream production process uses a 385 nm DLP machine with a 2K DMD, an exposure time of 1.6 s per layer at 9 mW/cm², and a build temperature of 25 °C. The printed bellows wall thickness is 0.8 mm; internal channels are flushed with 99.9% isopropanol for 10 minutes to remove uncured resin, then dried with filtered compressed air at 0.3 MPa and post-cured at 405 nm, 25 mW/cm², for 45 minutes. Pressure testing at 20–60 kPa with 10,000 cycles verifies pin-hole-free flexible operation; pressures above 60 kPa with a wall thickness below 0.8 mm can produce layer-interface burst before membrane tear. Compliance standards include ISO 34-1:2015 Method B for tear strength, ASTM D638-14 for tensile modulus, 2011/65/EU RoHS, and EC 1907/2006 REACH. End-of-arm tooling classes produced in this segment include vacuum gripper cups, soft robotic fingers, and pick-and-place end-of-arm tooling.
A wiring harness pass-through on an electric bus battery housing exposes the elastomer to vibration, zinc-rich coatings and temperature spikes up to 80 °C. The production cell prints the grommet from 100 wt% Soft ToughRubber™ Elastomer without plasticizer, carbon black, or mineral filler; the formulation addition ratio is 100 wt% resin, 0 wt% filler, 0 wt% plasticizer, and 0 wt% sulfur curative. Downstream production uses a 405 nm DLP system with 50 µm layers, an integrated sealing rib profile, and a build plate temperature of 22 °C; after printing, parts are washed in tripropylene glycol monomethyl ether for 15 minutes, rinsed in 99.9% isopropanol for 3 minutes, and post-cured at 405 nm, 20 mW/cm², for 50 minutes. Contact with polar solvents, brake fluid, or hot aliphatic hydrocarbons above 60 °C is not recommended; specific long-term immersion data for this exact photopolymer is limited. Compliance standards for automotive enclosures include FMVSS 302 flammability, ISO 3795 for burning rate, SAE J200-2011 for rubber classification, ASTM D395-18 Method B for compression set, and ASTM D2137-17 for low-temperature brittleness. The production cell delivers electric bus battery housing pass-through grommets, powertrain damping pads, and HVAC drain grommets.
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Adaptive3D Soft ToughRubber™ Elastomer for DLP is an ultraviolet-curable acrylate photopolymer formulated for digital light processing systems operating in the 385–405 nm wavelength range. The product designation is the Soft ToughRubber™ grade within the Adaptive3D elastomer series; no separate numerical model identifier is used in available technical documentation. Manufacturer-reported typical cured hardness is 50 Shore A when measured under ASTM D2240-15, placing it at the lower-durometer end of the series relative to Elastic ToughRubber™ 70A and ToughRubber™ 90A. The resin is intended for direct additive manufacturing of elastomeric parts such as soft robotic actuators, gaskets, vibration-isolation elements, and wearable components where reversible deformation and tear resistance are required without compression or injection molding tooling.
Unopened containers should be stored at 15–30°C and shielded from ambient ultraviolet exposure. Viscosity increases below 15°C; the resin should be conditioned to 25°C before vat transfer. Water contamination above 0.2% by mass alters photopolymerization kinetics and can reduce tensile elongation by up to 10% relative to dry resin. Containers should be purged with dry nitrogen after partial use when ambient relative humidity exceeds 60%.
Rigid acrylate and epoxy DLP resins typically display flexural modulus between 1.5 GPa and 3.5 GPa and elongation at break below 20% under ASTM D790-17 or ASTM D638-14. The Soft ToughRubber™ grade is formulated with a comparatively low crosslink density and an elastomeric network architecture that yields tensile elongation in the 400–500% range and tensile strength in the 4.0–5.0 MPa range under ASTM D412-16. This change from glassy, high-modulus behavior to rubbery, low-modulus response is the primary performance border separating the material from rigid prototyping resins.
Relative to semi-rigid flexible photopolymers that reach Shore A 70–90, the Soft ToughRubber™ grade reduces compressive stiffness and improves conformance to irregular sealing surfaces. It also differs from many low-durometer flexible photopolymers by retaining tear strength above 10 kN/m when tested under ASTM D624-00. This combination is not universal among photopolymer elastomers; many low-hardness resins sacrifice tear resistance to achieve lower modulus.
The following manufacturer-reported typical values were generated on XY-oriented tensile and tear specimens printed at 100 μm layer thickness, post-cured for 30 min at 60°C under 405 nm ultraviolet light, and conditioned at 23 ± 2°C and 50 ± 10% relative humidity for 24 h before testing.
| Property | Typical value | Test method |
|---|---|---|
| Hardness | 50 Shore A | ASTM D2240-15 |
| Tensile strength at break | 4.0–5.0 MPa | ASTM D412-16, Die C |
| Elongation at break | 400–500 % | ASTM D412-16, Die C |
| Tear strength | 12–16 kN/m | ASTM D624-00, Die C |
| Compression set after 22 h at 70°C | 8–12 % | ASTM D395-16, Method B |
| Viscosity at 25°C | 1,800–2,500 mPa·s | Brookfield RVT, spindle 4 |
| Density | 1.04–1.06 g/cm³ | ASTM D792-20 |
Values generated under non-standard post-cure or on green-state specimens should not be compared directly to the table. Ambient-air post-cure can leave an oxygen-inhibited surface layer that increases surface tack and lowers tear strength by 10–15% relative to inert-atmosphere curing. Z-axis tensile specimens may show 10–20% lower strength than XY specimens if interlayer conversion is incomplete; inert post-cure narrows this difference to approximately 5–10%. Users should generate application-specific data for parts with walls thinner than 2 mm and for repeated flexural loading.
Soft robotic actuator prototypes printed on 385 nm bottom-up DLP equipment with 100 μm layers and 10–15 s layer exposure require the resin vat to remain at 25–35°C. At lower temperatures, viscosity increase produces meniscus retention and air entrapment between fine rib features. At higher temperatures, dark polymerization in the vat shortens usable resin bath life. Published data for specific actuator geometries and long-cycle fatigue above 10,000 cycles is limited; design verification under service conditions is required.
Footwear midsole and insole prototypes printed from this resin exhibit compressive stress at 20% strain in the 0.3–0.5 MPa range and require lattice or honeycomb internal structures to tune stiffness. Compared with injection-molded SEBS or TPU foams, direct DLP parts avoid closed-cell foam variability but may have higher apparent density unless hollow structures are used. Published data for energy return after repeated compression at 5 Hz is limited; dynamic mechanical analysis should be conducted under service-condition loading.
On a bottom-up DLP system with 2.5 mW/cm² irradiance at 385 nm, adequate build-platform adhesion is typically achieved with 4–6 burn-in layers exposed for 12–15 s. For 100 μm layers, normal layer exposure is commonly in the 8–15 s range depending on projector uniformity and window condition. Degraded fluoropolymer release film increases separation force and can cause edge delamination; optical window recalibration is recommended after every 500 h of lamp life or when increasing warpage is observed across the build area.
In continuous production on 200 mm × 100 mm build areas, build-platform delamination is the dominant early-stage failure mode. Increasing burn-in exposure by 20–30% relative to normal layer exposure and using a polypropylene or aluminum build surface with a light abrasive finish improve first-layer retention. Batch-to-batch variation in tensile elongation is reduced when the resin is conditioned to a constant 25°C and the vat is stirred or recirculated after idle periods longer than 24 h.
When printing hollow elastomeric components, drainage holes of at least 2 mm diameter are needed to allow uncured resin removal. Closed cavities retain liquid resin, create internal hydrostatic pressure during post-cure heating, and can cause wall rupture or dimensional distortion. On production bottom-up DLP systems, open channels and venting are preferred over blind holes.
After printing, green parts are removed from the platform and cleaned in isopropanol or propylene glycol monomethyl ether acetate for 1–3 min in an ultrasonic bath. Solvent immersion beyond 5 min can swell the green structure by 1–3% and reduce tear strength. Filtered air at ≤0.4 MPa is used to remove residual solvent. Final post-cure is conducted in a 405 nm ultraviolet chamber with a 60°C thermal soak for 20–40 min; inert atmosphere during post-cure is preferred to minimize surface tack.
The cured resin is not resistant to acetone, methyl ethyl ketone, chlorinated hydrocarbons, or strong oxidizing acids. Immersion in acetone for 24 h can produce volumetric swelling above 30% and corresponding tensile strength loss. Compatibility with aliphatic hydrocarbon oils and dilute aqueous detergents is generally acceptable at room temperature, but users should verify using ISO 175:2010 immersion protocols. Continuous load-bearing service temperature should remain below 70°C; short-term exposure to 100°C for 1 h may increase compression set. Amine-based additives are contraindicated because residual basic species can accelerate post-cure and embrittlement. The material has not been validated for food-contact or prolonged skin-contact applications unless the specific end-use is certified under the relevant regulatory standard.
Manufacturer documentation should be consulted for current REACH and RoHS status. Compliance with RoHS 2011/65/EU and REACH SVHC restrictions should be confirmed per production lot because pigment and stabilizer packages may vary. Do not assume food-contact or medical-grade compliance without explicit lot-specific certification.
