| HS Code | 717692 |
| Material Type | UV-curable liquid resin |
| Color | White |
| Appearance | Opaque liquid |
| Viscosity At 25 C | 250 mPa·s |
| Density | 1.10 g/cm³ |
| Tensile Strength | 50 MPa |
| Tensile Modulus | 2500 MPa |
| Elongation At Break | 10% |
| Flexural Strength | 80 MPa |
| Flexural Modulus | 2300 MPa |
| Shore D Hardness | 85 |
| Glass Transition Temperature | 75°C |
| Water Absorption | 0.5% |
| Volume Shrinkage | 0.5% |
| Cure Wavelength | 385-405 nm |
| Recommended Layer Thickness | 25-100 µm |
| Packaging | 1 kg, 5 kg |
As an accredited Prodways PLASTCure Model 320 Liquid Resin for 3D Printing factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | A 1 kg opaque amber plastic bottle of Prodways PLASTCure Model 320 Liquid Resin for 3D Printing, with hazard labels. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with Prodways PLASTCure Model 320 Liquid Resin for 3D printing, securely palletized and restrained for safe transport. |
| Shipping | Prodways PLASTCure Model 320 Liquid Resin ships in sealed, UN-approved containers. It is generally not classified as dangerous goods for transport, but local and international rules may apply. Ship upright, protect from heat, sunlight, and freezing. Use compliant labeling, SDS, and PPE; inspect for leaks on receipt. |
| Storage | Store Prodways PLASTCure Model 320 Liquid Resin in its original, tightly sealed container, upright, in a cool, dry, well-ventilated area. Protect from direct sunlight, UV light, heat, sparks, and flames. Keep away from incompatible materials. Avoid freezing and prolonged high temperatures; maintain a stable, moderate temperature. Follow the safety data sheet for specific limits. Use appropriate PPE when handling. |
| Shelf Life | Shelf life is typically 12 months in the sealed original container at 15–25°C, protected from sunlight, heat, and freezing. |
PLASTCure Model 320 is processed as a liquid acrylate photopolymer on moving-light projection systems operating in the 385–405 nm band. For this resin class, equilibration at 20–30 °C before build is standard; lower temperatures increase viscosity and reduce recoating uniformity. Layer thickness is typically set at 50 µm or 100 µm, with the finer mode used where surface texture below 100 µm is required. The green part is rinsed in 99.9 % isopropanol or a formulated wash solvent for 2–4 min, then dried with compressed air at 0.2–0.4 MPa. Post-cure for high-resolution acrylate photopolymers is conducted in a UV flood chamber delivering 2–6 J/cm² at 405 nm; the part is then conditioned at 23 °C and 50 % RH for 24 h. Batch-to-batch viscosity variation should be recorded with a flow cup or rheometer because recoating defects increase when viscosity shifts by more than 15 %. Published data for PLASTCure Model 320-specific formulation beyond these general windows are limited.
| Equipment type | Wavelength | Typical dose or temperature | Process boundary |
|---|---|---|---|
| UV LED flood | 405 nm | 2–6 J/cm² at 20–30 °C | Dose above 6 J/cm² may cause amber shift and embrittlement. |
| UV mercury arc | 365–405 nm | 3–8 J/cm² at 20–30 °C | Spectral output must be measured; UVA/UVB imbalance can undercure surface layers. |
| Thermal convection oven | N/A | 40–60 °C for 2 h after UV | Thin walls below 1.5 mm require fixturing to avoid distortion. |
In condensation-cure tin-catalysed RTV silicone toolmaking, the printed master is conditioned for 24 h at 23 °C and 50 % RH to allow residual acrylate to reach final conversion. A parting agent is frequently omitted for matte silicone surfaces because the photopolymer surface is non-porous; however, platinum-cure addition silicones may exhibit cure inhibition when residual amine or organotin contaminants are present. The standard mould-making ratio is 10:1 by weight for many tin RTV systems, but viscosity and hardness vary by supplier. The silicone is degassed at 5–10 mbar until bubble collapse. The resulting elastic tool captures feature sizes below 100 µm when the master is built at 50 µm layer thickness. The end products are short-run moulds for casting polyurethane, wax, or plaster; the relevant elastomer property is tensile tear strength tested to ASTM D624-20. The master must not be exposed to temperatures above 60 °C during silicone cure acceleration because dimensional drift can occur. Published data for Model 320 used with specific platinum-cure silicones are limited; a cure inhibition test coupon is recommended before committing production geometry.
Indirect lost-wax casting tooling starts with the same photopolymer master, but the critical downstream step is production of a wax injection mould from room-temperature vulcanized silicone. The mould is cut or split to eject wax patterns at 70–80 °C melt temperature and 0.2–0.5 MPa injection pressure. The Model 320 master must survive demoulding forces without fracture; thin sections below 1.5 mm are supported by a back-fill of rigid polyurethane or plaster. Wax pattern shrinkage is compensated by scaling the master geometry 0.8–1.2 % depending on wax specification. The finished output is a wax replica used for investment casting of jewellery, dental copings, or fine mechanical components. The process boundary is the silicone mould’s resistance to cyclic flexing; tearing at the parting line occurs after roughly 50–100 injection cycles depending on wax filler content and mould geometry. Compliance with the EU Nickel Directive EN 1811:2011 + A1:2015 is relevant only for finished metal items, not for the photopolymer master. No direct burnout of PLASTCure Model 320 is assumed in this route; the resin is not claimed as a castable pattern material.
To produce short-run polyurethane enclosures, a silicone mould generated from a PLASTCure Model 320 master is used. The master is printed with a wall thickness of 2–3 mm and post-cured to stabilize edge definition before moulding. Polyurethane back-fill mixing ratios are commonly 1:1 or 2:1 by volume, and degassing is performed at 10–50 mbar before pouring. Moisture ingress into the polyurethane feedstock produces bubbles and surface pitting; many suppliers limit water content to 0.05 % by Karl Fischer titration, and feedstock is conditioned at 25–35 % RH in a dry-air cabinet. The photopolymer master itself is not used as a functional part in this process; it is a sacrificial geometric reference. Dimensional tolerance of the resulting polyurethane parts is influenced by silicone mould shrinkage and polyurethane cure shrinkage; typical linear compensation of 0.3–0.6 % is applied. The relevant mechanical test for finished short-run enclosures is ISO 178:2019 flexural modulus. Published data for Model 320 dimensional stability under repeated silicone moulding cycles are limited.
For thermoforming tooling, the insert is built as a porous shell with vent holes of 0.3–0.8 mm diameter connected to a vacuum plenum. The sheet stock is heated to its sag temperature; for HIPS the typical upper limit is 120–160 °C, but the PLASTCure Model 320 insert is maintained below 60 °C by tooling coolant or intermittent cycling. Contact time with the heated sheet is limited to the forming cycle of 10–30 s; prolonged contact leads to creep at fine ribs. Sheet thickness is typically 0.5–2.0 mm for polystyrene, PETG, or thin-gauge ABS. The finished output is a low-volume packaging blister or tray. The compliance boundary is set by EU 2011/65/EU RoHS for electrical and electronic equipment packaging if the tray is used in assembly; the photopolymer insert itself must meet the same substance restrictions under the manufacturer’s declaration. No claim is made for thermoforming of polycarbonate or polysulfone sheet at temperatures above 120 °C.
High-resolution anatomical models derived from CT or MRI DICOM data are printed for pre-surgical planning and clinician communication. The segmentation workflow converts voxel data to an STL mesh with a surface smoothing tolerance of 0.2 mm. The printed model is cleaned, post-cured, and verified against the source DICOM using an optical 3D scanner; deviation reports are generated with a tolerance band of ±0.25 mm. End products are non-implantable diagnostic aids. No regulatory claim under 21 CFR 812 or ISO 10993-1:2018 applies because the model does not enter the body and is not a medical device. The principal limitation is impact fracture in thin cortical bone sections below 1 mm; such features are strengthened by thickening the digitized shell before printing. Published data for Model 320 in hospital-specific disinfection cycles are limited; alcohol wipes may cause microcrazing over repeated exposure.
| Application | Standard or directive | Requirement | Applicability to PLASTCure Model 320 |
|---|---|---|---|
| General chemical registration | EU 1907/2006 REACH | SVHC communication | Applicable to resin supplier declaration |
| Electrical/electronic tooling | EU 2011/65/EU RoHS | Pb, Hg, Cd, Cr VI, PBB, PBDE limits | Applicable when fixture enters electronics assembly |
| Medical device biological evaluation | ISO 10993-1:2018 | Cytotoxicity, sensitization | Not claimed for non-implantable anatomical models |
| Food contact | FDA 21 CFR 177 | Migration limits | Not claimed |
| Mechanical tensile | ASTM D638-14 | Type V specimen | Useful for comparative batch data, not a product certification |
| Flammability | UL 94 HB | Burn rate | Not assigned without specific test on printed coupon |
In low-volume electronics assembly, printed fixtures hold flexible printed circuits during conformal coating, screen printing, or laser marking. The fixture is built as a flat or contoured carrier with locating bosses and spring tabs; these features are sized at 1.5–3 mm width to withstand repeated clamping. The processed PLASTCure Model 320 fixture requires a post-cure at 405 nm and then a dry-air bake at 40–50 °C for 2 h to remove residual solvent. The fixture is chemically compatible with common no-clean flux residues, but it is not suitable for immersion cleaning in methylene chloride or MEK, which cause surface softening and dimensional swelling. End products are retained PCB panels during selective soldering or adhesive dispensing. Compliance follows EU 2011/65/EU RoHS for process tooling in electronics manufacturing. The static-dissipative property of Model 320 is not declared; if electrostatic discharge protection is required, the fixture must be coated with a dissipative lacquer or replaced by a conductive composite resin.
For microfluidic development, prototype manifolds are printed with internal channel dimensions of 200–800 µm to test flow distribution before injection moulding. The uncured resin is evacuated from the channels by flushing with isopropanol at 0.1–0.2 MPa using a syringe or peristaltic pump, followed by vacuum drying at -0.8 bar for 30 min. The manifold is post-cured with a fibre-coupled UV LED inserted into the channel where available; otherwise, external flood curing leaves internal surfaces partially undercured. Channel aspect ratio is typically 1:1 to 2:1 to balance resin drainage and flow resistance. Leak tightness is verified with compressed air at 1–2 bar under water immersion. End products are development manifolds for diagnostic instrument prototypes or reagent routing blocks. The material is not certified for prolonged contact with aggressive organic solvents; acetonitrile and tetrahydrofuran should be avoided. Published data for Model 320 in continuous microfluidic contact with aqueous buffers beyond 24 h are limited.
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Prodways PLASTCure Model 320 Liquid Resin for 3D Printing is a single-component, unfilled photopolymer formulated for vat photopolymerization platforms that use digital light processing or masked stereolithography at a nominal working wavelength in the near-UV to violet region. The formulation is positioned within the manufacturer’s PLASTCure family as a modeling resin, meaning its primary design target is dimensional fidelity in form, fit, and assembly prototypes rather than high-temperature service, elastomer recovery, or ash-free burnout. The liquid is processed in layer thicknesses typically between 25 µm and 100 µm, with the upper limit controlled by cure depth, optical density, and recoating uniformity. Because the uncured material is a radical-initiated photopolymer, it is sensitive to ambient light below approximately 450 nm; storage and handling require opaque or amber containers and filtered lighting. The product differs from filled composite resins in that it does not contain ceramic or mineral filler for elevated modulus or reduced shrinkage. It differs from castable resins in that its thermolysis and ash profile are not specified for clean burnout in a refractory shell. Independent third-party mechanical data for this exact formulation are not widely published; all production parameters should follow the current manufacturer’s technical datasheet, safety data sheet, and lot-specific certificate of analysis.
The numeric designation “320” is a product-grade identifier, not a Shore hardness or heat deflection temperature value. The product is commonly integrated into build cells with non-abrasive tray cleaning, anti-stick overcoats, and periodic DLP irradiance calibration. Heating of the resin bath is not usually required when ambient temperature is maintained between 20 °C and 25 °C. Outside this band, viscosity drift can change recoated film thickness and produce print-through, delamination, or soft bands on the build platform.
For unfilled acrylate modeling resins of this class, the transition from a tacky green state to a harder, less soluble network is controlled by accumulated exposure dose, the spectral distribution of the light engine, and ambient oxygen concentration. In bottom-up vat photopolymerization, oxygen inhibition can suppress conversion in the first 5–15 µm of the build interface when the window is gas-permeable; the consequence is a weakly crosslinked region that may require a deliberate overexposure compensation or inert-gas blanketing. The operator should derive a working curve for the specific platform. A standard Jacobs working curve describes cure depth as Dp × ln(E/Ec), where Dp is penetration depth, E is applied exposure, and Ec is critical exposure for gelation. Published values for penetration depth and critical exposure for this specific formulation are limited in public databases; deriving them from a printed step-test is therefore required for any new batch or after replacement of the DLP chip.
The recoating velocity in continuous DLP machines must be reduced when the resin’s viscosity approaches the upper end of its batch-release envelope. Liquid viscosity is reported according to ISO 3219:2017. A temperature drop of 3–5 °C can produce a measurable increase in film thickness because the shear stress in the recoat gap does not equilibrate fully. This is a class behavior common to unfilled low-viscosity model resins, not a product-specific defect. On production-scale equipment, delayed recoating appears as diagonal wipe marks, starved regions adjacent to the build area, or periodic soft bands after peel. To reduce such defects, the resin should return to a uniform temperature before large builds, and localized heating from the DLP source should be managed in continuous run modes.
Build orientation affects the cured resin differently from isotropic thermoplastics. Because photopolymerization is layered, the z-axis often shows reduced elongation and lower fracture resistance in bending. Tensile testing per ASTM D638-14 may not capture interlayer weakness if specimens are machined horizontally; a supplementary three-point bend test per ISO 178:2019 with the load applied parallel and perpendicular to build planes is recommended for acceptance. In practice, horizontal specimens frequently display less than half of the z-axis strain at break, although this depends on the post-cure UV dose and thermal annealing. Published data for this specific formulation in z-axis loading is limited; manufacturing cells using the material for load-path components should derive their own orientation-dependent data set.
The following table presents a class-level property envelope for unfilled low-viscosity modeling photopolymers. It is provided for preliminary technical comparison only and does not replace lot-specific certificates of analysis. Variation arises from build orientation, post-cure wavelength, post-cure duration, and conditioning atmosphere. Single-point values for Prodways PLASTCure Model 320 should be read from the current manufacturer’s datasheet.
| Property | Test method | Typical envelope |
|---|---|---|
| Liquid viscosity at 25 °C | ISO 3219:2017 | 200–450 mPa·s |
| Cured density | ISO 1183-1:2019 | 1.10–1.20 g/cm³ |
| Tensile strength | ASTM D638-14 | 35–50 MPa |
| Tensile modulus | ASTM D638-14 | 1.5–2.5 GPa |
| Flexural strength | ISO 178:2019 | 55–80 MPa |
| Flexural modulus | ISO 178:2019 | 1.5–2.3 GPa |
| Elongation at break | ASTM D638-14 | 2–8% |
| Heat deflection temperature at 0.455 MPa | ASTM D648-18 | 48–65 °C |
| Shore D hardness | ISO 868:2003 | 78–88 |
When comparing this product against high-temperature rigid resins, the most operationally significant difference is not the room-temperature modulus but the onset of thermal deflection and the recovery after thermal cycling. Model 320 is generally specified for dimensional modeling at ambient temperature; heat deflection values in the class envelope indicate that hot air, boiling water, or tool-contact temperatures above approximately 60 °C can produce measurable creep under load. In contrast, high-temperature engineering resins in the same manufacturer’s range are formulated for elevated glass transition and lower creep at service temperatures. The product therefore belongs in workflows where the deliverable is a visual or dimensional model rather than a thermoplastic injection mold insert or a vulcanizing-tool master.
In direct comparison with the manufacturer’s castable resins, Model 320 lacks the specified low-ash decomposition signature. Compared with flexible resins, it exhibits lower elongation and higher tensile modulus, which supports dimensional stability but limits snap-fit reuse. Compared with high-temperature rigid resins, the thermal deflection boundary is lower, and sustained exposure to oil or coolant at elevated temperature is not a specified operating condition. These differences should be evaluated using the acceptance protocol of the intended application, not by a single property value.
If a facility uses castable resin for prototype patterns but requires only visual or dimensional representation, Model 320 may reduce cleaning burden because the uncured resin drains more easily from thin sections and support cavities. However, the replacement is not valid for direct investment casting. The thermal decomposition of the cured network is not controlled for ash content under the slow heating ramps specified in dental or jewelry casting furnaces. Users who attempt burnout may observe incomplete shell drainage and carbon residue if the material is heated above its decomposition onset. Published data for this specific configuration is limited; pattern shops must run a furnace trial with thermocouple profiling before substituting any castable grade. The same limitation applies to applications requiring negligible residual ash under ASTM D2584-18 or an equivalent gravimetric ignition-loss test.
After printing, uncured resin removal is usually conducted in a two-stage wash. The first stage may use isopropanol or a terpene-free aliphatic solvent; the second stage is often a clean solvent rinse to reduce residue. Solvent contact time must be controlled because over-exposure to strong solvents can plasticize the cured surface and reduce surface hardness by 2–5 points on the Shore D scale. The exact solvent compatibility of Model 320 should be confirmed in the manufacturer’s processing guide. Waste streams containing uncured resin are classified according to local hazardous-waste codes and should not be discharged into aqueous drains. The cured solid can be handled as a non-hazardous solid in ordinary service after full conversion, but photoinitiator residuals on the surface may require post-cure and drying before skin contact is unrestricted.
Surface finish and dimensional stability after post-cure are controlled by the solvent-removal step. Residual uncured monomer left in blind holes or enclosed channels can continue to react for days under ambient light or during shipping, causing local warpage and surface tack. The product should therefore be inspected for visible wetness after the final wash and before the post-cure oven. Parts with trapped resin should be drilled or drained. For thin-walled sections below 1 mm, post-cure exotherm and shrinkage can close small holes; a reaming or calibration step is recommended when tolerances are tighter than ±0.2 mm on as-built features.
Storage of the liquid resin at temperatures above 30 °C can reduce usable pot life and shift the photoinitiator’s optical density; storage below 5 °C may induce crystallization or viscosity hysteresis. The recommended storage band is therefore maintained between 15 °C and 25 °C, with protected storage from light below 450 nm. Before returning a batch to service after cold storage, the container should be allowed to equilibrate to room temperature and gently rolled for at least 15 minutes, not shaken vigorously, to avoid air entrapment. The uncured resin is classified under the European CLP Regulation; the safety data sheet contains hazard statements for skin and eye irritation and for aquatic toxicity. Handling requires nitrile gloves, sealed safety goggles, and local exhaust ventilation. The product should not be used in solvent-wash stations containing low-flash alcohols without verifying compliance with local process safety directives. Cured polymer dust from post-machining should be controlled by local exhaust to avoid combustible particulate accumulation. Compliance for electrical and electronic equipment under Directive 2011/65/EU and for chemical registration under REACH (EC) 1907/2006 must be confirmed through the manufacturer’s declaration, not inferred from product trade nomenclature.
