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High-Temperature Resin is a photosensitive polymer whose heat deflection temperature (HDT) is far higher than that of standard resins. Standard UV-curable resins typically have an HDT of 40-70°C and soften at moderately elevated temperatures. High-temperature resins, by contrast, achieve an HDT of 200-300°C or above, maintaining stable shape, dimensions and mechanical properties under sustained heat — making them a key engineering material as UV-curable 3D printing extends toward end-use functional parts.
The core technology of high-temperature resins lies in building a high-crosslink-density system. Formulations typically employ heat-resistant monomers such as bisphenol-A epoxy acrylate and urethane acrylate, along with rigid molecular backbones to raise the glass transition temperature (Tg). The synergy of high Tg and high crosslink density ensures that the cured polymer network remains rigid at elevated temperatures, preventing softening and collapse caused by increased molecular chain segment mobility.
High-functionality monomers build a dense three-dimensional crosslinked network, restricting free movement of molecular chain segments at elevated temperatures and fundamentally raising the thermal ceiling.
Uses bisphenol-A epoxy acrylate, urethane acrylate and other rigid-backbone monomers, imparting excellent thermal stability at the molecular level.
Glass transition temperature is the key metric for heat resistance. Rigid molecular structures raise Tg significantly, ensuring the material remains in its glassy state at high temperatures.
With an HDT above 280°C, it can be used directly for injection mold prototyping and high-temperature functional part validation — breaking through the limitation of UV resins to appearance parts only.
HDT of 280°C and above, far exceeding standard resins at 40-70°C, enabling long-term use in high-temperature environments without softening or deformation.
Minimal thermal expansion at high temperatures. Dimensional changes during thermal cycling are controllable, meeting the tolerance requirements of precision engineering components.
High hardness and rigidity after curing, capable of bearing significant structural loads — suitable for jigs, fixtures and load-bearing structural parts.
Supports fine-detail printing and complex geometries with strong detail reproduction, suitable for high-precision functional models.
Directly print injection molds for small-batch trial molding without machining steel molds, dramatically shortening development cycles and reducing costs.
Printed functional prototypes can be tested under real high-temperature operating conditions, exposing design flaws before mass production.
As 3D printing extends from prototyping to end-use functional parts, high-temperature resin meets scenarios with rigid heat-resistance requirements for final use.
eSUN's self-developed HT100 high-temperature resin is a core strategic move to extend the UV-curable product line into engineering-grade applications. Addressing the industry pain point that conventional UV resins lack heat resistance and cannot be used for high-temperature functional parts, eSUN designed the molecular structure from the ground up, building a heat-resistant system with synergistic high crosslink density and rigid backbones to achieve an HDT above 280°C.
HDT above 280°C, far exceeding standard resins, with stable shape and performance under sustained heat.
Synergy of high crosslink density and rigid backbones ensures minimal dimensional change during thermal cycling, meeting precision tolerance requirements.
High hardness and rigidity after curing, capable of bearing structural loads — suitable for jigs and load-bearing parts.
Supports fine structures and complex geometries with strong detail reproduction, meeting engineering-grade precision requirements.
Breaks through the limitation of UV resins to appearance parts only, enabling direct use in high-temperature functional parts and injection mold prototyping.
| Feature | Description | Impact |
|---|---|---|
| Relatively low toughness | High crosslink density and rigid backbones, while improving heat resistance, sacrifice some elongation at break and impact toughness | Not suitable for applications involving severe impact or requiring high toughness |
| Limited transparency | High-crosslink systems typically appear dark or translucent, with limited color options | Not suitable for applications requiring high light transmittance or fully transparent appearance |
| Demanding post-processing | Requires thorough post-curing and stepwise heat treatment to reach the rated HDT; the process is more complex than for standard resins | Increases production time and operational threshold; post-curing parameters must be strictly controlled |
| Higher cost | Heat-resistant monomers and high-crosslink formulations cost more than standard resins | Material price is relatively high, suited for high-value engineering applications rather than consumer-grade use |
eSUN's high-temperature resin product line is centered on HT100, developed in-house for engineering-grade high-temperature applications, and continues to expand toward higher temperature resistance and greater precision.
HT100 is eSUN's self-developed high-temperature UV-curable resin with a heat deflection temperature above 280°C, maintaining stable shape in high-temperature environments. It offers excellent thermal stability, high-precision forming capability and high hardness, combined with strong mechanical performance to meet the requirements of structural parts, jigs and long-term use components.
Heat deflection temperature above 280°C with excellent thermal stability, enabling long-term use in high-temperature environments.
Supports fine-detail printing and complex geometries, suitable for high-precision functional models and validation prototypes.
Combines high hardness with strong mechanical performance, meeting the requirements of structural parts, jigs and long-term use components.
| Industry | Typical Applications | Material Value |
|---|---|---|
| Automotive | Engine compartment component prototypes, hot-air duct validation parts, heat-resistant enclosures, sensor bracket functional parts. | HDT above 280°C enables real-condition testing in the high-temperature engine compartment environment. |
| Industrial Manufacturing | Injection mold prototyping, small-batch production molds, high-temperature jigs and fixtures, thermoforming master molds. | Directly print injection molds for trial molding without machining steel molds, dramatically shortening development cycles and reducing costs. |
| Electronics & Electrical | Heat-resistant electronic enclosures, high-temperature insulation parts, connector prototypes, PCB soldering fixtures. | Excellent thermal stability and high rigidity meet the dimensional stability requirements of high-temperature electronics applications. |
| Prototype Validation | Functional prototype testing under high-temperature conditions, thermal cycling validation, assembly verification parts. | Printed functional prototypes can be tested under real high-temperature operating conditions, exposing design flaws before mass production. |
Using HT100 to directly print injection molds for small-batch trial molding without machining steel molds, rapidly validating product design before mass production and shortening development cycles.
Printing high-temperature electronic device enclosures and protective covers that maintain structural integrity and dimensional stability under sustained heat.
Printing high-temperature functional prototypes in automotive and industrial fields to simulate real operating conditions for thermal cycling and assembly validation.
Compared with: Standard Resin, High-Strength Resin
| Dimension | High-Temperature Resin | Standard Resin | High-Strength Resin |
|---|---|---|---|
| Heat Deflection Temperature (HDT) | Above 280°C, best heat resistance | 40-70°C, poorest heat resistance | 80-150°C, moderate heat resistance |
| Hardness & Rigidity | High hardness and rigidity, suitable for structural parts and jigs | Medium hardness, average rigidity | Higher hardness, outstanding toughness, balanced rigidity and toughness |
| Toughness & Impact Resistance | Lower elongation at break, relatively limited toughness | Average toughness, somewhat brittle | Best toughness and impact resistance |
| Typical Applications | Injection molds, high-temperature functional parts, heat-resistant enclosures, prototype validation | Appearance display parts, figurine models, concept prototypes | Load-bearing structural parts, snap-fit mechanisms, functional fixtures |
| Cost Positioning | High, engineering-grade formulation | Low, consumer-grade general purpose | Medium-high, engineering-grade formulation |
| Parameter / Action | Recommended | Notes |
|---|---|---|
| Layer Thickness | 0.025 - 0.05 mm | Thinner layers improve precision and heat resistance but require longer exposure |
| Bottom Layer Exposure | 30 - 60 s | Ensures first layers firmly adhere to the build platform |
| Normal Layer Exposure | 6 - 12 s | High-temperature resin requires thorough crosslinking; exposure is slightly longer than standard resin |
| Light Source Wavelength | 405 nm | Compatible with mainstream LCD / DLP / SLA resin printers |
| Bottom Layers | 4 - 8 layers | Increase bottom layer count to improve adhesion stability |
| Lift Distance | 5 - 8 mm | High-viscosity resin requires a slightly larger separation distance |
| Post-Curing Time | 15 - 30 min | Requires thorough curing; a UV post-curing chamber is recommended |
| Stepwise Heat Treatment | 80°C → 120°C → 160°C | Gradual ramping relieves internal stress and maximizes crosslink density and HDT |
Settings should be adjusted according to your printer model, light source power and model geometry. The final heat resistance of high-temperature resin depends heavily on post-curing and heat treatment processes. This guide does not replace the official parameter sheet for a specific grade.