VisiJet CE-NT is a photopolymer elastomer supplied for MultiJet Printing systems operating at 32 µm layer thickness. The material is processed in its as-received state without compounding, melt filtration, or granulation. Downstream commercial relevance is concentrated in non-structural elastomeric components, functional prototypes, and short-run test articles where design iteration replaces compression-molded EPDM, cast silicone, or thermoplastic elastomer tooling. The following application scenarios are limited to non-implantable and non-structural service unless the end user completes independent migration, cytotoxicity, fluid compatibility, and mechanical validation specific to the final device. Mechanical values are batch-specific and must be verified through ASTM D412 tensile, ASTM D2240 Shore A, ASTM D624 tear, and ASTM D395 Method B compression set testing before production acceptance.

How Does the Material Function in Weather-Sealed Industrial Enclosures?

Enclosure sealing applications use CE-NT as a printed gasket bead or compression lip that is assembled into a machined tongue-and-groove channel, not as a dispensed sealant. The downstream production sequence is additive: the gasket profile is built at 2.0 mm to 2.5 mm nominal cross-section with the part oriented so that sealing faces are not parallel to interlayer boundaries, support material is removed at 60–65°C in the supplier’s recommended oven cycle, and the dried gasket is compressed to 70–80% of original height during closure. Compliance is established at enclosure level by IEC 60529 IP66 or IP67 testing on the final assembly, while material-level quality control uses ASTM D412 for tensile set, ASTM D624 for tear resistance of the sealing lip, and ASTM D395 Method B for compression set. The formulation addition ratio is 100% as-supplied; no solvent, plasticizer, or secondary resin is introduced, because non-reactive diluents reduce the UV cure conversion and leave residual tack that contaminates the sealing surface. When a lower compression set is required, the preferred response is to increase bead cross-section to 2.8–3.0 mm and reduce compression to 15–20%, then re-test under ASTM D395 Method B at the actual service temperature. Terminal part types include IP-rated enclosure gaskets, cable entry glands, flange seals for outdoor instruments, and removable access-panel gaskets produced in lots of 20–200 units.

Clinical engineering groups print non-invasive anatomical training models and surgical navigation phantoms from CE-NT because the material’s low Shore A response approximates the tactile feedback of soft tissue without requiring silicone casting. Compliance for these non-patient-contact articles is governed by the receiving institution’s risk assessment; the raw material is not supplied with an ISO 10993 biocompatibility declaration, and the printed article must not be sterilized for invasive or skin-contact use. Contract manufacturers supplying medical device developers typically produce these models under ISO 13485 quality management, but the standard applies to the documented build process rather than to the material’s clinical compatibility. The formulation addition ratio is 100% as-jetted; haptic stiffness is tuned by internal gyroid or rectilinear lattice infill from 30–80% volume fraction, not by blending with plasticizers or rigid resins. The downstream production process uses a 32 µm layer thickness for vessel wall resolution, followed by support material removal at 60°C, then air aging at 23±2°C for 24–48 h to stabilize Shore A values before use. Where surface friction must approximate wet tissue, a medical-grade silicone oil or water-soluble lubricant is applied after cure; no additive is mixed into the resin. Published data for specific needle insertion force and puncture geometry for CE-NT phantoms is limited, so each phantom lot requires insertion force characterization on a universal testing machine with 1 N force resolution before testing protocols are finalized. Finished products include vascular access training phantoms, soft-tissue blocks for device path-planning, and fit-test articles for wearable medical device housings.

Soft-Touch Overmolding Prototypes for Handheld Electronic Devices

When handheld electronics housings require repeated grip-force testing, design groups replace compression-molded silicone grip regions with printed CE-NT overmold prototypes while the rigid housing is still changing for thermal or antenna reasons. The soft component is printed separately and assembled over the rigid shell; it does not flow into a closed mold and is not co-cured with polycarbonate or ABS-like substrates. The downstream process begins with a rigid MJP or CNC shell carrying 0.5–0.8 mm raised mechanical locking ribs, onto which a CE-NT sleeve of 1.2–1.5 mm wall thickness is mounted after support material removal. Compliance for the assembled ICT enclosure is evaluated under IEC 62368-1 for mechanical strength, while the processed article is screened against the supplier’s REACH Article 33 SVHC disclosure and RoHS 2011/65/EU restricted substance limits; final certification remains with the device assembler. The formulation addition ratio is 100%; no adhesion promoter is mixed into the elastomer phase, and when chemical bonding is attempted, a primer or mechanical interlock is applied to the rigid shell after printing. Prototype peel resistance is assessed with a 90° peel fixture using ASTM D6862 or equivalent adhesive peel methodology, but the test must be reported as a system value because failure commonly occurs in the interface rather than the CE-NT bulk. Published data for lot-to-lot Shore A variation is limited; incoming QC under ASTM D2240 should measure at least 3 lots before setting grip-force specifications. Terminal parts include handheld instrument grips, wearable device strap anchors, control knob sleeves, and camera body overmolds produced in 5–50 units per iteration.

For under-hood wiring harness verification, connector engineering groups evaluate low-volume elastomeric grommets, split-boot connectors, and dust boots by printing CE-NT when EPDM tooling revisions would consume the available design-verification window. The production sequence places the grommet axis perpendicular to the printed layers so that installation tensile load acts across the cross-section rather than along interlayer planes; support material is removed at 60–65°C, and the part is conditioned at 23±2°C and 50±5% RH for 24 h before mechanical testing. Compliance for under-hood service is evaluated using SAE J1455 thermal and mechanical shock profiles on the assembled harness, but the resin’s published heat resistance and fluid compatibility data must be confirmed separately for each engine compartment fluid because supplier datasheets may not provide volume swell data for Diesel fuel, coolant, or brake fluid. The addition ratio is 100% as-supplied; if a softer response is required, the part is edited with a lattice infill of 20–40% volume fraction rather than adding a plasticizer, because plasticizer migration would deposit on connector contact surfaces and create intermittency. Terminal components include panel grommets, split conduit seals, firewall pass-throughs, and prototype dust boots produced in 10–200 unit lots.

When a Fluid-Handling Bellows Requires Cycle Testing Before Elastomer Selection

If a pump or valve development program requires elastomeric bellows for cycle testing, CE-NT is printed to measure stroke force, flex life, and dynamic seal behavior before committing to compression-molded EPDM, nitrile, or fluorocarbon parts. The manufacturing sequence is additive-only: the bellows is printed at 0.7–1.0 mm wall thickness with 32 µm layer height, support material is removed in the supplier-recommended oven cycle, and the channel is cleaned with compressed air at 0.2–0.3 MPa to remove residual support material. Compliance for fluid resistance is assessed by immersion testing in the target fluid using ASTM D471, with volume swell and Shore A change recorded at 24 h, 72 h, and 168 h; continuous service is not recommended until volume swell is below 5% and Shore A change is below 10% from the conditioned reference. The formulation addition ratio is 100%, and no internal mold release, accelerator, or plasticizer is blended into the photopolymer. If a check-valve diaphragm requires lower compression set, the diaphragm is oriented so that flexural hinges do not lie parallel to layer boundaries, and a post-cure of 40–60°C for 2–4 h may be applied only if supplier documentation supports that thermal exposure for the specific lot. Published data for CE-NT exposed to aggressive solvents is limited, so a screening study under ASTM D471 is mandatory before any field trial. Terminal components include pump bellows, expansion joints, pinch-valve sleeves, and prototype peristaltic tubing segments.

Acoustic Damper Units for Consumer Wearables Are Printed in 32 µm Layers

In consumer wearable validation builds, CE-NT is used to produce small-batch acoustic dampers and vibration isolators when cast silicone pads cannot hold thin-section features below 2.0 mm. The additive production process uses 32 µm layer thickness to maintain curved damping-rib geometry; support material is melted at 60°C, and the finished damper is stabilized at 23°C for 24 h before resonance testing. Compliance for the assembled wearable is assessed under RoHS 2011/65/EU and the supplier’s REACH SVHC disclosure, while acoustic performance is measured by swept-sine excitation from 20 Hz to 5 kHz using a shaker table and paired accelerometers, with transmissibility compared against a reference cast silicone pad of identical envelope. The formulation addition ratio is 100% as-jetted; damping response is tuned by fin thickness of 0.4–0.8 mm and air gaps of 0.2–0.5 mm, not by mixing with viscoelastic additives, because additive blending destabilizes jetting viscosity and increases nozzle clogging frequency. Terminal products include vibration-isolating mounts, earphone cushion frames, sensor isolation pads, and damper inserts produced in 5–100 units for validation builds.