In design-to-manufacturing workflows for athletic footwear midsoles and outsoles, the PolyJet combination built from AGILUS30 (FLX2040), AGILUS30 BLACK (FLX9840), and RIGUR functions as a non-molded elastomer for fit trials, gait-lab testing, and flex-crack visual evaluation before committing to vulcanized EVA or TPU tooling. The governing test framework for this application is ASTM D638-14 for tensile stress-strain, ASTM D2240-15 for durometer verification, and ASTM D624-00(2020) die C for tear resistance on trouser specimens. When the prototype sole is mounted to a host upper for slip screening, SATRA TM137:2019 is applied to the wet and dry friction interface. The build recipe sets AGILUS30:RIGUR at a 70:30 volume ratio targeting Shore A 45; when a black midsole is required, FLX9840 replaces FLX2040 part-for-part without altering the ratio, though the operator must verify durometer because carbon-black pigmentation can shift cure response in thin ribs. No external plasticizer, blowing agent, or filler is added; cartridges are roll-stabilized for 24 h at 23 ± 2 °C and 50 % RH before loading into a J850 Prime or J826 Prime system. Production processing occurs at 14 µm layer height with in-line UV curing, after which SUP705 support material is removed with a low-pressure water-jet at 0.3–0.6 MPa and the finished sole insert is bench-dried for 4 h at 60 °C only when compression-set validation slabs drift beyond the acceptable band. Parts exiting this process are used as midsole negative inserts, heel-counter fatigue models, and outsole traction-pattern masters for athlete fit trials; they are not final footbed cushioning components. Published data for this specific footwear configuration is limited, so each lot requires a 5-specimen tensile and tear set before test plan release.

How Are Leakage Rate and Shore A Drift Controlled in Robotic Vacuum Gripper Elements?

The leakage-rate qualification of a soft-robotic vacuum gripper element printed from AGILUS30 (FLX2040) and RIGUR begins with the flow-characterization framework of ISO 6358-1:2013 for pneumatic components using compressible fluids, supplemented by an application-specific leak-tightness test at -85 kPa gauge over a 30 s hold period. Compression set is evaluated per ASTM D395-18 Method B after 22 h at 70 °C, because repeated bellows collapse under robot acceleration generates internal heat and surface creep at the fold root. The selected blend is 50:50 AGILUS30:RIGUR by volume for a target Shore A 60; when the black-pigmented FLX9840 is substituted for FLX2040 in dark-line tooling, the firmware may trim the metered ratio toward 45:55 to compensate for pigment-induced cure inhibition, but this adjustment is software-defined and not accessible to operators. Processing is performed as a single-piece bellows with integrated air channel, printed at 16 µm layer thickness on a multi-head J5 Series platform; the internal channel is washed with a fan-nozzle water-jet at 0.4 MPa after support removal, and walls below 1.2 mm are rejected during inspection because collapse under vacuum produces localized thinning. Component geometry is oriented with the fold direction parallel to the X-Y build plane, since Z-loaded tensile bars consistently show 15–20 % lower elongation at break than XY bars under ASTM D412-16. Finished parts are vacuum cups, bellows-style suction grips, and end-of-arm tooling pads for case-packing robots and bin-picking cells. The operational boundary is strict: do not clean with ketones, esters, or amine-based detergents, because these solvents cause surface tack and dimensional swell; only 70 % isopropanol applied for 30 s is permitted on sealing lips.

Because IEC 60601-1 compliant medical device enclosures require tactile, finger-safe components that can survive repeated ethanol-wipe cleaning during bench-top usability testing, the AGILUS30/AGILUS30 BLACK and RIGUR combination is printed as a non-patient-contact enclosure mockup rather than as an applied part. The governing compliance path for this scenario is IEC 60601-1:2005+A1:2012 for mechanical hazard risk control at the enclosure seam, ISO 14971:2019 for risk management file documentation, and ISO 10993-5:2009 only as a screening benchmark; no cyto-compatibility claim is made for this digital blend without third-party extraction and L929 testing. The formulation addition ratio is 40:60 AGILUS30:RIGUR by volume targeting Shore A 65, with FLX9840 substituted when black bezels or dark-colored grips are required for user-interface contrast. The downstream process uses a J5 Series PolyJet at 16 µm layer height with in-line UV cure; after support removal, the parts are post-cured at 60 °C for 2 h and then subjected to 1,000 cycles of wipe-down with 70 % isopropanol to screen for surface tack, gloss loss, or ink transfer before the device build can proceed. Components produced in this workflow include enclosure bumpers, probe-handle grip shells, monitor-bezel prototypes, and hand-switch housings used in pre-purchase hospital evaluations. The limitation is explicit: this material combination is not autoclave-stable and is not suitable as a final patient-contacting applied part, because residual unpolymerized monomer may leach under warm aqueous contact. Published data for this specific configuration is limited; each device-specific lot must pass the wipe and mechanical-hazard check before release to the usability lab.

Compression Set and Sealing Force Retention in Automotive Interior Switch Boots

The failure mode that dominates automotive interior switch boots is compression set at the fold root after repeated gear-shift or HVAC actuation under cabin soak temperatures. The validation standard set for this application includes ASTM D395-18 Method B for compression set after 22 h at 70 °C, ASTM D624-00(2020) die C for tear resistance, DIN 53504:2017-03 for tensile stress-strain, and FMVSS 302 under 49 CFR 571.302 for horizontal burn-rate classification of occupant-compartment materials. The production recipe uses a 50:50 volume ratio of AGILUS30 FLX2040 to RIGUR for a Shore A 60 digital elastomer, with AGILUS30 BLACK FLX9840 replacing FLX2040 part-for-part for black switch boots to eliminate post-print urethane coating. The downstream process prints convoluted boots and grommets at 16 µm layer thickness on a J850 Prime, but the dominant process conflict is support removal from deep convoluted folds; supports are removed with a water-jet at 0.5 MPa and residual support gel is inspected under 10× magnification because embedded support material reduces tear resistance at the fold. Build orientation is constrained: the fold line must lie in the X-Y plane because Z-loaded specimens show 15–20 % lower elongation and lower tear strength; boots oriented with the fold perpendicular to Z are rejected after 500-cycle actuation testing at 85 °C. Components exiting this process are gearshift lever boot seals, wiring grommets, HVAC damper seals, and door-switch bellows used in interior prototype builds. Exposure limits are defined: continuous contact with gasoline, diesel, or aromatic hydrocarbon solvents is not permitted, and post-print application of amine-catalyzed urethane coatings must be avoided because amine residues can accelerate surface oxidation and reduce durometer stability.

Table 1. Validation matrix for automotive interior switch boot builds from AGILUS30/RIGUR digital material.

Under accelerated wear cycling for consumer wearables, the combination of AGILUS30 (FLX2040) and RIGUR is processed into low-durometer strap sections and button-gasket geometry to evaluate dynamic fit, repeated flex, and perspiration resistance before mass tooling with liquid silicone rubber or TPE. The governing standards are ASTM D412-16 for tensile set after cyclic elongation, ASTM D4060-19 Taber abraser with CS-10 wheels for surface wear, IEC 60068-2-78:2012 damp-heat exposure at 85 °C / 85 % RH for color and durometer retention, and UL 94:2023 HB classification for the strap housing. The blend selection is 55:45 AGILUS30:RIGUR by volume for a Shore A 55 strap, with FLX9840 used when a black strap is required to hide UV-driven yellowing at the buckle interface. Production occurs at 18 µm layer thickness on a J55 Prime with flat-array nesting to minimize X-Y orientation effects; support removal is performed with low-pressure water-jet at 0.3 MPa, and the strap is then dried for 6 h at 23 °C before assembly with stainless steel lugs. Post-processing may include application of a medical-grade pressure-sensitive adhesive backing to the inner strap surface, but the photopolymer surface must first pass a cross-hatch adhesion test under ASTM D3359-23 method B. Components exiting this process are smartwatch strap sections, VR headset facial-interface gaskets, remote-control keypad covers, and soft overmold simulants for handheld consumer devices. The operational boundary includes no continuous contact with high-pH detergents, no alcohol exposure exceeding 30 s, and no application of amine-based hand creams before fit testing, because these contaminants produce irreversible surface tack and micro-voiding at layer boundaries.

When a Hand-Held Diagnostic Device Needs a Shore A 70 Bumper Without Silicone Compression Molding

A Shore A 70 bumper printed from the AGILUS30/AGILUS30 BLACK and RIGUR combination is implemented when a hand-held diagnostic device requires drop-impact cushioning and sealing ribs but cannot justify the lead time or tooling cost of compression-molded silicone. The compliance set for this application includes ASTM D412-16 for tensile properties, ASTM D2240-15 for post-cure durometer, ASTM D395-18 Method B for compression set at 23 °C and 70 °C, IEC 60601-1:2005+A1:2012 for mechanical strength and drop-test risk control, EC 1907/2006 REACH documentation, and Directive 2011/65/EU RoHS for restricted substance evidence. The build ratio is 30:70 AGILUS30:RIGUR by volume, with FLX9840 substituted for black bumper geometry when the device exterior uses dark colors; this higher RIGUR fraction raises elastic modulus and reduces maximum elongation compared with lower-durometer blends, so wall sections under 1.5 mm are verified for impact-induced cracking at the corner bosses. The downstream production process prints the bumper and sealing rib as a single continuous digital material at 16 µm layer height on a J850 Prime, using matte finish on the outside wall and a smooth sealing face on the inside rib; support removal is followed by 60 °C post-cure for 2 h, and the sealing face is then checked for flatness under an optical profilometer at 0.1 mm total indicated runout. Components produced under this scenario include diagnostic handheld bumpers, battery-cover gaskets, docking-station pads, and protective corners for point-of-care instruments. The exclusion criteria are explicit: do not stack this bumper against a silicone seal without mechanical compression stop, do not expose to glutaraldehyde-based disinfectants, and do not bond with cyanoacrylate adhesives without prior surface plasma treatment, because the adhesive attack causes micro-cracking at the layer interfaces. Published data for this specific configuration is limited; validation of the final device must include a 26-drop sequence per internal instrument drop-test protocol derived from the IEC 60601-1 mechanical-hazard clause.