In consumer electronics prototyping workflows, DM_9860/9760 is handled as a neat jettable photopolymer rather than as a compounding raw material; the resin is loaded directly into PolyJet cartridges at 100% solids with no added diluent, accelerator, or pigment. Compliance screening for wearable and handheld prototypes typically follows RoHS 2011/65/EU Annex II restricted-substance limits and REACH Regulation (EC) No 1907/2006 Article 33 SVHC communication duties because prototype housings may pass through import clearance as finished articles. The downstream process consists of jetting at 16–30 µm layer heights on DM-capable PolyJet platforms, followed by water-jet support removal from rubber-like digital material surfaces; operators should limit water pressure to prevent delamination at wall thickness below 0.5 mm. Material lots are validated by printing a Type C tensile bar per ASTM D412-16 in the same build to control lot-to-lot stiffness drift. Terminal prototypes include smartwatch band links, earbud retention wings, VR headset facial gaskets, and button membranes where repeated flexing is evaluated under ASTM D412-16 tensile and ASTM D624-00(2020) tear methods.

When EPDM Shore A 60 Prototypes Are Required Before Tooling Release, the Process Window Narrows

Automotive sealing system teams evaluate transfer-molded EPDM equivalents by printing cable grommets, firewall pass-throughs, and steering rack dust boots in DM_9860/9760 before committing to steel tooling. The formulation rate is not an independent variable; the resin remains a 100% neat photopolymer, while Shore A is altered only by machine-generated digital material ratios when the same cartridge is paired with rigid PolyJet resins. Compliance review in this segment is governed by IMDS entries and customer-specific restricted substance lists aligned to REACH Annex XVII, and flammability screening may be commissioned under ISO 3795:1989 or FMVSS 302 for interior applications; published data for DM_9860/9760 in these tests is often limited, so suppliers request lot-specific certification before benchmark testing. Downstream production employs Stratasys Connex3 or equivalent PolyJet equipment with 16 µm glossy mode and a support strategy that orients tear-sensitive lips away from the water-jet axis. A critical processing boundary appears at grommet wall thickness below 0.7 mm; the combination of water-jet support removal and subsequent drying at 23±2 °C and 50±5% RH for 24 h can shift Shore A by 2–5 units if parts are tested immediately after removal. Terminal parts include electrical harness grommets, cable bellows, shift lever boots, and pedal cover prototypes submitted for dimensional tolerance analysis before elastomer tooling release.

Preoperative planning teams and simulation centers procure rubber-like photopolymer blends for non-sterile anatomic replicas where tactile response and translucency are used to differentiate vascular, ductal, and parenchymal tissue planes. The material is not used as an additive in a formulated liquid mixture; it is jetted neat at 100% through individual PolyJet heads, while composite Shore A values from 30 to 85 are produced by the printer’s DM editor rather than by manual weighing. Biocompatibility assessment for these training devices follows ISO 10993-5:2009 cytotoxicity and ISO 10993-10:2010 sensitization, but DM_9860/9760 is not represented as an implantable or tissue-contacting final material without project-specific testing. The manufacturing process uses 30 µm or 16 µm layer thickness modes to produce hollow vascular segments that are then cleaned with pH-neutral detergent at a bath temperature not exceeding 40 °C; steam autoclave exposure above 60 °C is contraindicated because published data for DM_9860/9760 under 121 °C saturated steam is limited and may produce dimensional distortion. The most demanding process conflict in this segment is the support removal from branching vessels with internal diameters below 3 mm; water-jet pressure above 20 MPa cleaves vessel bifurcations, while pressure below 12 MPa leaves support fragments in tortuous aortic arch models. Terminal products include cardiac valve simulators, laparoscopic kidney units, neurosurgical aneurysm models, and airway management trainers, with acceptance testing managed under ISO 13485 supplier control rather than product certification.

Soft-Robotic End-of-Arm Tooling and ISO/TS 15066 Force-Limiting Verification

Collaborative robot gripper surfaces and vacuum cup bellows are printed from DM_9860/9760 when engineers need compliant contact pads with predictable force-deformation behavior under low-energy collisions. The addition ratio remains 100% neat resin in the cartridge; if a stiffer backer is required, the printer may generate a graded digital material containing DM_9860/9760 and a high-tensile rigid resin, but the ratio is set inside the machine’s DM editor and cannot be reproduced by volumetric mixing. Compliance evaluation follows ISO/TS 15066:2016 for collaborative robot force and pressure limits, with materials-only documentation reviewed against ISO 10218-1:2011 and end-effector functional safety under ISO 13849-1:2015 where applicable. The production route includes printing vacuum bellows at 16 µm layer height, removing support through a low-pressure water jet at 15–20 MPa, and then drying for 24 h at 23±2 °C before force-mapping tests on a force/torque sensor with 0.1 N resolution. A key limitation is that DM_9860/9760 is not recommended for contact surfaces exposed to neat mineral-oil greases without compatibility validation; a 72 h immersion test per ASTM D471-16a must be conducted before deployment. Terminal components include suction cups, gripper fingertips, collision buffers, and robot-to-bin edge guards.

Does Compression Set Data from Accelerated Aging Predict Chemical Plant Gasket Life?

In chemical plant maintenance bays, elastomeric gasket prototypes are produced from DM_9860/9760 for bolted flange assemblies that are later converted to EPDM or FKM production gaskets. For this segment the material is jetted at 100% solids; no post-jetting compounding is performed, and the flange gasket thickness is controlled by the number of 16 µm layers rather than by mold flash removal. Compliance screens for chemical plant prototypes typically require declarations under REACH Article 33 and may include resistance testing according to ASTM D471-16a for fluid exposure, ASTM D395-18 Method B compression set at 70 °C for 22 h, and ASTM D573-04(2019) hot-air aging. The processing chain is simple: the gasket is printed flat with outer diameters up to the build envelope, supports are removed by water jet below 15 MPa, and bolt holes are reamed with hand tools rather than laser-cut to avoid localized melting. The operational boundary is that compression set data from DM_9860/9760 under accelerated aging should not be linearly extrapolated to continuous chemical service; the material is a prototyping polymer and not a replacement for process-ready FKM with validated ASTM D2000 line callouts. Terminal products include flange gaskets for DN 50 to DN 200 mock-ups, pump casing O-ring prototypes, tank lid seals, and manway cover evaluations.

Midsole and outsole evaluation fixtures are produced as Shore A 40–70 digital photopolymer components for fit, tread block deflection, and cleat distribution studies before injection-molded TPU tooling is released. The material is handled neat at 100%, with no blowing agent or curative admixed; density and rebound are taken from the supplier technical datasheet rather than reformulated in the footwear laboratory. Compliance requirements in this segment focus on REACH Regulation (EC) No 1907/2006 restricted substance screening and California Proposition 65 warning labels if prototype parts are shipped to US trade events. Production consists of printing sole-last outsole shells in 30 µm high-speed mode, water-jet support removal, and then bonding the elastomer shell to a rigid arch stiffener with an adhesive validated for elastomer-to-rigid bonding. Operators must avoid etching the bond line with solvent cleaners above 30% ethanol because monomer carryover can reduce peel adhesion evaluated under ASTM D6862-11. Terminal components include midsole flex test samples, cleat stud layouts, toe cap fit models, and torsion-control heel counters.