Clariant Thermoplastic Urethane Pink 3D Printer Filament
- Название продукта: Clariant Thermoplastic Urethane Pink 3D Printer Filament
- Сайт Factroy: Округ Юду, Ганьчжоу, Цзянси, Китай
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- Производитель: Ascent Petrochem Holdings Co., Limited
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- Clariant Thermoplastic Urethane Pink 3D Printer Filament is typically used in formulations when Shore A hardness and elongation at break and extrusion temperature and moisture content must be controlled within specific ranges.
| Код ТН ВЭД | 715008 |
Как аккредитованный завод Clariant Thermoplastic Urethane Pink 3D Printer Filament, мы соблюдаем строгие протоколы качества - каждая партия подвергается строгим испытаниям для обеспечения последовательных стандартов эффективности и безопасности.
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In vascular access simulator production, the material is processed into layered dermal analogues that require a Shore A hardness within 85A to 95A to approximate the resistance of human forearm tissue under needle cannulation. A nozzle diameter of 0.4 mm and layer height of 0.12 mm to 0.16 mm are specified to reproduce the subtle anatomical contours of the antecubital fossa without post-machining. Print speed is constrained to 20 mm/s to 35 mm/s on direct-drive extruders to prevent filament buckling in the feed path, a failure observed on Bowden configurations when the unsupported length exceeds 120 mm. Bed adhesion is established on polyetherimide sheets at 50°C to 60°C, with a brim of 6 mm at minimum for wall thicknesses below 2 mm. The resulting training pads are subjected to puncture resistance testing under ASTM F2878-19, with acceptance criteria of 1.2 N to 2.8 N peak penetration force across a 21G needle to simulate live tissue resistance. Cytotoxicity screening follows ISO 10993-5:2009 using the elution method on printed coupons conditioned at 37°C for 72 h in Minimum Essential Medium. Published data for this specific pink pigment-loaded TPU grade under repeated needle puncture beyond 200 cycles is limited, and validation protocols are typically executed on a per-lot basis at the device manufacturer level.
Moisture uptake in the filament prior to extrusion alters capillary void formation between adjacent raster lines. The material is dried at 70°C to 80°C for 6 h to 12 h in a forced-air desiccating dryer with a dew point below −30°C. When ambient relative humidity exceeds 60%, a print-chamber enclosure with desiccant regeneration is required to maintain interlayer fusion integrity. Voids exceeding 0.05 mm in cross-section produce failure during intradermal suture practice, where tensile tear propagation along layer boundaries occurs below 18 kN/m tear resistance measured per ASTM D624-00(2020). End products within this segment include venous access training arms, paracentesis pads, and ultrasound-guided biopsy phantoms, each with wall thickness calibrated independently against acoustic impedance targets of 1.4 MRayl to 1.6 MRayl verified by pulse-echo measurement.
What Failure Mode Limits Burst Pressure in Thin-Wall TPU Bellows Actuators Printed at 0.8 mm Wall Thickness?
Delamination between adjacent extrusion layers is the dominant rupture mechanism in pneumatic soft-robotic bellows produced from flexible TPU filament. When the bellows wall is specified at 0.8 mm and the extrusion multiplier is set to 1.02 to 1.05, interlayer adhesion reaches a practical maximum because the melt front retains sufficient thermal energy to promote polymer chain diffusion across the raster interface. A print temperature of 235°C to 245°C is maintained with a hardened steel nozzle of 0.4 mm bore, and cooling fan speed is reduced to 40% maximum to prevent rapid vitrification of the deposited strand. Under these conditions, burst pressure testing with compressed air at a ramp rate of 5 kPa/s produces failure at 35 kPa to 55 kPa for a bellows with an internal diameter of 12 mm and 3 convolutions. Below 230°C, interface peel strength measured per ASTM D6862-11(2021) drops below 0.6 N/mm, and the actuator fails at the layer plane rather than exhibiting ductile tearing of the membrane.
Geometric discontinuities at the convolution root concentrate stress during inflation. A fillet radius of 0.6 mm minimum is programmed at the bellows inner root to reduce the stress concentration factor to below 1.8. Fatigue life under cyclic inflation from 0 kPa to 30 kPa is characteristically in the range of 3,000 to 8,000 cycles before pinhole leakage develops at the crown, based on published data for Shore 90A ester-based TPU printed at comparable layer heights. Tensile elongation at break of the bulk material, measured per ASTM D638-14 at a crosshead speed of 500 mm/min, is typically 450% to 600%, but this value is not predictive of actuator lifespan because failure occurs at fusion boundaries rather than within the polymer continuum. Post-print annealing at 80°C for 4 h in a nitrogen-purged oven improves interlayer bond strength by 15% to 25% over non-annealed controls, a gain attributed to chain reptation across the raster interface above the material’s glass transition temperature.
End products fabricated within this segment include adaptive gripper fingers for food handling operations, soft robotic wearables for rehabilitation, and deployable haptic interface membranes. Published data for this specific Clariant pink TPU grade under pneumatic cyclic loading is limited; the values above are derived from published studies on ester-based TPU filaments of equivalent Shore hardness and melt flow index. The use of the pink pigment masterbatch may reduce interlayer weld strength by 3% to 7% relative to unpigmented base polymer due to stress concentration at pigment particle agglomerates above 5 µm in diameter, as measured by scanning electron microscopy of fractured layer interfaces.
Midsole Lattice Density Gradients and Rebound Resilience in Footwear Prototyping
Lattice-infilled midsoles require systematic variation of volumetric fill fraction to achieve target cushioning response without excessive mass. Gyroid infill at 15% to 25% density is specified for the forefoot zone, transitioning to 35% to 45% in the heel strike region where peak ground reaction forces reach 2.5 to 3.0 times body weight. The pink TPU filament is printed with a layer height of 0.16 mm and extrusion width of 0.45 mm to maintain gyroid wall continuity without surface roughness exceeding Ra 12 µm, the threshold above which abrasion against sock textiles produces visible filament pilling under 5,000 cycles of ASTM D4966-12(2016) Martindale abrasion testing. Vertical rebound resilience measured on solid TPU specimens under ASTM D2632-15 falls between 35% and 50%, with the lower bound relevant to energy-dissipating heel zones and the upper bound for responsive forefoot flex regions.
Compression set is controlled to below 20% after 22 h at 23°C per ASTM D395-18 Method B when lattice density exceeds 20%. Below that threshold, cell wall buckling produces permanent deformation above 35% set after 100,000 cycles of simulated gait loading at 3 Hz on an Instron ElectroPuls E3000 fitted with a 25 mm circular compression platen. The printed midsoles serve exclusively as fit validation and biomechanical test articles; they are not intended for continuous wear service beyond 50 km cumulative distance. Heel counter mockups are printed solid at 100% infill with a wall count of 4, then post-processed by vapor smoothing using tetrahydrofuran exposure for 15 s to 30 s to reduce surface porosity before silicone overmolding trials.
Print bed adhesion for large flat components measuring 250 mm × 120 mm × 25 mm requires a raft-free approach using polyvinyl alcohol-based adhesive films applied to a heated borosilicate glass bed at 60°C. Warp-induced delamination from the bed occurs when the part length exceeds 300 mm, driven by accumulation of anisotropic shrinkage stress estimated at 0.8 MPa to 1.2 MPa along the raster direction. This limitation dictates that full-length midsoles for sizes above EU 44 are printed in diagonal orientation at 30° to 45° relative to the Y-axis to distribute the stress field.
If enclosure wall thickness is specified below 1.5 mm for consumer electronics protective sleeves, the material’s impact absorption capacity is governed by the strain-rate dependence of the elastomer rather than by static tensile data alone. Drop testing performed per MIL-STD-810G Method 516.6 Procedure IV on sleeves fitted to mobile devices with a mass of 180 g to 250 g produces peak transmitted acceleration values of 150 g to 300 g from a drop height of 1.2 m onto a concrete impact surface. At wall thicknesses of 2.0 mm to 2.5 mm, transmitted acceleration is reduced to below 120 g, meeting the survivability threshold for glass display panels without polymer fracture. The sleeve is printed in spiralized outer-perimeter mode with a 0.8 mm extrusion width and a single outer wall, while internal lattice ribs of 20% density are inserted to prevent collapse during lateral compression.
Dimensional accuracy for snap-fit features integrated into the sleeve body is verified on a coordinate measuring machine with a stated expanded uncertainty of ±0.02 mm. Feature sizes below 0.8 mm in the rib interlock geometry are excluded from the design because the flexible filament’s compliance under extruder force produces undersized internal radii by 0.1 mm to 0.3 mm relative to CAD nominal values. Compensation factors of 1.02 to 1.04 on external perimeters and 0.97 to 0.99 on internal channels are applied in the slicing parameter set. Shore hardness measured on sleeve outer surfaces under ASTM D2240-15 with a type A durometer and a 6 mm thick coupon is 88A to 92A, sufficient to resist fingernail indentation without exceeding the tactile softness requirements for handheld device accessories.
Skin-Contact Durability Requires Layered Post-Processing Above Shore 90A
Prosthetic socket interface liners produced from pink TPU filament demand surface smoothness values below Ra 3 µm to minimize skin irritation during donning and doffing cycles. Printing at a layer height of 0.10 mm with a 0.25 mm nozzle reduces the waviness amplitude to 8 µm to 12 µm, but chemical vapor smoothing is still required to achieve the surface finish target. The liner is suspended in a chamber saturated with dimethylformamide vapor at 50°C for 10 min, followed by forced-air evaporation at 60°C for 4 h to remove residual solvent to below 50 ppm as verified by gas chromatography. Dermal sensitization testing under ISO 10993-10:2010 is performed on printed and vapor-smoothed coupons using the guinea pig maximization test; no erythema or edema reactions are reported for extracted samples at 72 h observation.
Wall thickness in the liner relief zones is specified at 1.2 mm to 1.8 mm to balance flexibility with resistance to socket suspension forces. The print orientation places the skin-contact surface on the build platform, eliminating support structure contact that generates microscopic surface defects. Tensile elongation at break along the circumferential direction measured per ASTM D412-16 Die C is 500% to 550%, exceeding the 300% minimum elongation required for donning over residual limb contours. The pink coloration serves as a visual wear indicator: surface abrasion after 6 months of daily use exposes underlying unpigmented layers, allowing clinicians to identify liner replacement points without destructive testing.
Chemical resistance screening against skin care products and perspiration simulant is conducted using ISO 105-E04:2013 color fastness protocols adapted for elastomeric substrates. The pink pigment shows ΔE color shift below 2.0 after 24 h exposure to artificial eccrine perspiration at 37°C, indicating acceptable colorant migration resistance. Published long-term wear data for this specific Clariant TPU grade in prosthetic interface applications is limited, and manufacturers are advised to conduct their own ISO 10993-1:2018 biological evaluation plans covering skin contact duration classification.
When Compression Set Under Thermal Load Exceeds Design Margin in TPU Gasket Prototypes
Automotive sealing system prototypes fabricated from this pink TPU filament are evaluated for compression set behavior under conditions that mirror underhood thermal environments. Testing follows ASTM D395-18 Method B with 25% constant deflection applied for 70 h at 70°C, after which the material must retain at least 75% of its original thickness recovery. Ester-based TPU formulations typically achieve compression set values of 18% to 25% under these conditions, remaining within sealing margins for static gasket applications with a maximum temperature envelope of 90°C. Exceeding this temperature produces accelerated stress relaxation because ester linkages undergo hydrolytic degradation in the presence of residual moisture, a mechanism confirmed by gel permeation chromatography showing molecular weight loss of 12% to 18% after 500 h aging at 100°C in 50% relative humidity.
The printed gasket prototypes are produced with 100% infill and a wall count of 5 to eliminate internal porosity that would serve as leak paths under flange compression. Extrusion temperature is raised to 245°C to promote coalescence between adjacent toolpaths, and print speed is reduced to 15 mm/s to maintain a melt residence time above 0.3 s per linear millimeter. Helium leak testing under ISO 12807:2018 is applied to finished gaskets installed between aluminum flange plates at a tightening torque of 8 N·m; the acceptance threshold is 1 × 10−6 mbar·L/s. Published data for the specific pink-pigmented Clariant TPU grade in automotive fluid exposure is limited, but reference ester-based TPU compounds show volume swell below 5% after 72 h immersion in IRM 903 reference oil at 70°C per ASTM D471-16a.
Compatibility with coolant and brake fluid is not verified for this material in its printed form. OEM validation for series production sealing applications requires separately compounded granulate grades with documented UL 94 HB ratings and IATF 16949:2016 material conformance, rather than FDM-printed filament articles. The printed gaskets serve exclusively for dimensional loop verification, flange surface conformity assessment, and early-stage packaging studies where quick-turnaround iterative geometry changes offset the material property limitations of the additive manufacturing route.
Validating removable partial denture framework trajectories against pink TPU printed gingival masks requires dimensional fidelity of the mucosal surface to ±0.05 mm. Printed gingival replicas at 0.10 mm layer height using a 0.25 mm ruby-tipped nozzle provide adequate resolution of the residual ridge contour when the underlying scan data is captured at 10 µm point spacing. The flexible TPU substrate must withstand repeated insertion and removal of cast cobalt-chromium frameworks during the design verification stage; tear strength measured per ASTM D624-00(2020) Die C exceeds 60 kN/m, sufficient for 100 insertion cycles without visible margin chipping when the framework clasp tips are polished to Ra 0.8 µm or finer. Framework seating pressure is controlled to below 35 N to avoid localized plastic deformation of the TPU gingival mask at thin zones under 1.0 mm.
The pink coloration is functionally significant in this segment because it provides contrast against the metallic framework and the white gypsum working model, allowing visual confirmation of complete seating without requiring optical scanning verification at every trial insertion. Colorimetric stability under dental operatory lighting is verified by exposing printed gingival masks to 5,000 lux fluorescent illumination for 200 h in accordance with ISO 7491:2000 accelerated light aging protocols; ΔE values remain below 3.0, indicating acceptable pigment photostability. Vacuum-formed surgical splint shells are produced by heating printed TPU models to 100°C to 110°C under a 0.4 mm PETG sheet; the TPU model resists deformation during the forming step because its vicat softening temperature is above 120°C per ISO 306:2022 Method A50.
Moisture conditioning before dental model printing is identical to other segments: drying at 70°C for 6 h in a regenerative desiccant dryer. Printing directly from an unsealed spool at relative humidity above 65% causes surface blemishes that translate into false-positive interference marks during framework try-in. The accumulation of such artifacts forces reprinting, adding 4 h to 6 h to the workflow for a full-arch gingival mask. Published data specific to this pink Clariant TPU grade in dental laboratory applications is limited; validation is performed at individual dental milling centers and dental school production laboratories using their own internal acceptance protocols.
Compliance Anchor Matrix for Pink TPU Filament Applications
| Application Segment | Primary Standard Anchor | Critical Performance Range | Processing Temperature Window |
|---|---|---|---|
| Medical training models | ISO 10993-5:2009; ASTM F2878-19 | Puncture force 1.2–2.8 N; Shore 85A–95A | Nozzle 235–245°C; Bed 50–60°C |
| Soft robotics bellows | ASTM D6862-11(2021); ASTM D638-14 | Burst 35–55 kPa; Peel >0.6 N/mm | Nozzle 235–245°C; Fan <40% |
| Footwear midsole prototypes | ASTM D2632-15; ASTM D395-18 | Rebound 35–50%; Set <20% | Nozzle 220–240°C; Bed 60°C |
| Electronics protective sleeves | MIL-STD-810G 516.6; ASTM D2240-15 | Transmitted <120 g at 2.0–2.5 mm wall | Nozzle 225–240°C; Spiralized mode |
| Prosthetic liners | ISO 10993-10:2010; ASTM D412-16 | Elongation 500–550%; Ra <3 µm | Nozzle 230–240°C; Bed 55°C; Vapor smoothing 50°C |
| Automotive gaskets | ASTM D395-18; ISO 12807:2018 | Compression set 18–25%; Leak <1×10−6 mbar·L/s | Nozzle 245°C; Speed 15 mm/s |
| Dental gingival masks | ASTM D624-00(2020); ISO 7491:2000 | Tear >60 kN/m; ΔE <3.0 | Nozzle 230–240°C; Layer 0.10 mm |
All compliance claims above reference the applicable test method designation and the measured or published range for ester-based thermoplastic polyurethane filaments with Shore A hardness between 85A and 95A. Where the pink pigment loading introduces property deviations from unpigmented base resin, the delta is quantified in the specific scenario text. REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU compliance for cadmium, lead, mercury, hexavalent chromium, PBB, and PBDE are established at the compound level by the filament supplier under a Type III environmental declaration; finished printed article compliance remains the responsibility of the downstream fabricator because additive manufacturing processes introduce no additional restricted substances but may alter exposure surface area.
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- Clariant Thermoplastic Urethane Pink 3D Printer Filament Производится в соответствии с системой качества ISO 9001 и отвечает соответствующим нормативным требованиям.
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Clariant Thermoplastic Urethane Pink 3D Printer Filament is a flexible polyurethane feedstock supplied for fused filament fabrication and fused deposition modeling platforms. The resin belongs to the thermoplastic polyurethane class that is defined under ISO 1043-1:2011 as TPU and under ISO 18064:2017 as a block copolymer thermoplastic elastomer consisting of alternating diisocyanate-derived hard segments and polyol-derived soft segments. The supplier designation is a color-qualified commercial SKU within a thermoplastic urethane filament range; no separate numeric polymer grade beyond TPU is assigned in publicly available regulatory listings. Commercial supply documentation commonly lists diameter options of 1.75 mm and 2.85 mm, with a dimensional tolerance of ±0.05 mm. The batch certificate should be treated as authoritative because independent published data for this exact pink variant is limited. The filament is intended for non-structural flexible components in which recoverable deformation, impact damping, and abrasion resistance are more relevant than tensile stiffness. The pink colorant is a dispersed pigment masterbatch rather than a covalent chemical modifier, but its loading can still alter melt viscosity and ultimate tensile properties relative to an unpigmented TPU.
How Does the Pink Thermoplastic Urethane Differ from Rigid PLA and ABS Feedstocks?
The primary distinction between this material and rigid polylactic acid or acrylonitrile-butadiene-styrene feedstocks is deformation behavior. Thermoplastic urethane exhibits hyperelastic elongation and low flexural modulus; PLA and ABS generally fail through brittle fracture at low elongation. Published TPU filament data under ISO 527-2:2012 typically show elongation at break in the 400% to 600% range, while PLA and ABS remain below 10%. Tensile strength for TPU is structurally lower because the soft-segment matrix yields before the hard segments undergo chain scission. Flexural modulus under ISO 178:2019 generally falls between 50 MPa and 150 MPa for TPU, compared with 1,800 MPa to 3,500 MPa for ABS and PLA. This shift changes build strategy: bridge lengths must be reduced, supports must be placed more conservatively, and extrusion paths must be tuned for lower melt stiffness and higher melt elasticity. The product also differs in surface drag and adhesion behavior compared with rigid filaments, which may require a sacrificial adhesive layer or a textured build plate.
Compared with unpigmented TPU and with other elastomeric filaments, the pink formulation introduces several potential material differences. Pigmented TPU studies report tensile strength reductions of 5% to 15% at pigment masterbatch loadings above 2 wt% relative to natural resin, because dispersed pigment particles can nucleate hard-segment crystallization and act as local stress concentrators. Among TPU types, polyester-based products generally offer higher abrasion resistance and higher tensile modulus but lower hydrolysis resistance in hot humid service; polyether-based products provide better low-temperature flexibility and lower equilibrium moisture uptake. Compared with olefinic TPE filament or polyester elastomer filament, TPU typically exhibits higher abrasive wear resistance and higher resistance to oil and nonpolar solvents, but may require more aggressive pre-drying and more constrained print speeds. The exact rank order for this pink product should be verified through printed specimens under ISO 527-2:2012 and ISO 4649:2017 rather than inferred from resin-family averages.
| Property | Pink TPU filament class | PLA filament class | ABS filament class |
|---|---|---|---|
| Shore hardness, ASTM D2240-15 | 85A to 95A | 75D to 85D | 70D to 80D |
| Tensile strength, ISO 527-2:2012 | 25 MPa to 45 MPa | 45 MPa to 65 MPa | 30 MPa to 45 MPa |
| Elongation at break, ISO 527-2:2012 | 400% to 600% | 2% to 6% | 5% to 15% |
| Flexural modulus, ISO 178:2019 | 50 MPa to 150 MPa | 3,000 MPa to 3,500 MPa | 1,800 MPa to 2,500 MPa |
| Density, ISO 1183-1:2019 | 1.15 g/cm³ to 1.25 g/cm³ | 1.24 g/cm³ to 1.26 g/cm³ | 1.03 g/cm³ to 1.07 g/cm³ |
| Abrasion loss, ISO 4649:2017 | 20 mm³ to 50 mm³ | Not commonly specified for rigid FFF feedstock | Not commonly specified for rigid FFF feedstock |
When Moisture Content Exceeds 0.03 wt%, Extrusion Stability and Color Uniformity Deteriorate
TPU is hygroscopic. Under 23 °C and 50% RH, equilibrium moisture uptake for polyether and polyester TPU filament can reach 0.2 wt% to 0.5 wt%. Residual moisture above 0.03 wt% accelerates hydrolysis during melt processing, reducing molecular weight and melt strength. Pre-drying in a desiccant dryer at 70 °C to 80 °C for 4 h to 8 h is a standard preventive measure, and the spool should be maintained below 5% RH during printing. On production filament extrusion lines using co-rotating twin-screw extruders with L/D ratios of 32:1 to 44:1 and strand die holes of 1.6 mm to 2.0 mm, pellet moisture above 0.03 wt% has been observed to cause diameter drift exceeding ±0.08 mm, steam blistering, and hydrolytic chain scission. These failure modes are compounded in pink pigmented TPU because colorant dispersion and melt homogeneity must be maintained near the lower melt-temperature limit, where pigment particles increase apparent melt viscosity.
Extrusion temperatures for flexible TPU filament typically fall between 210 °C and 240 °C. Softer grades may be processed near the lower limit, and high-viscosity polyester grades near the upper limit. Heated bed settings of 20 °C to 60 °C are common; bed temperatures above 60 °C can cause dimensional drift and edge curl in thin flexible parts. Print speed is normally restricted to 15 mm/s to 30 mm/s for initial layers and 20 mm/s to 40 mm/s for infill, because higher linear speeds increase melt backpressure and can cause nozzle blockage or extruder motor skipping. For direct-drive extruders, retraction settings commonly range from 0.5 mm to 2.0 mm at 20 mm/s to 30 mm/s. Bowden configurations may require longer retraction distances but increase the risk of filament buckling, tube wear, and compressive feeding failure. The nozzle orifice should be selected between 0.4 mm and 0.8 mm; smaller orifices raise backpressure and may induce melt fracture. A part-cooling fan setting of 20% to 50% is commonly used because excessive cooling reduces interlayer diffusion and bond strength, while insufficient cooling allows slumping in overhangs.
Thermal, Rheological, and Mechanical Test Data
For quality-assurance comparisons, mechanical properties of printed TPU specimens are normally evaluated under ISO 527-2:2012 for tensile behavior, ISO 178:2019 for flexural modulus, and ASTM D2240-15 or ISO 7619-1:2010 for Shore hardness. A nominal Shore A range of 85A to 95A is common for flexible TPU 3D printer filament; harder TPU grades above 98A or Shore D 55D are available but process more like rigid polymers. Melt flow rate can be characterized under ISO 1133-1:2022 at 230 °C with 2.16 kg load, although many filament suppliers do not publish melt flow rate for flexible TPU because melt viscosity and shear sensitivity are more directly relevant to nozzle flow stability. Abrasion loss under ISO 4649:2017 for industrial polyester TPU is often in the 20 mm³ to 50 mm³ range; polyether TPU may show higher volume loss. Tear strength under ISO 34-1:2015 commonly falls between 30 kN/m and 80 kN/m for commercial TPU grades. These values are resin-class ranges, not batch-specific values for the named pink product, and a supplier certificate should be requested for critical applications.
| Standard or framework | Scope and application to TPU filament or printed parts |
|---|---|
| REACH, Regulation (EC) No 1907/2006 | SVHC disclosure, authorization, and restriction obligations depending on monomer, pigment, and stabilizer inventory. |
| RoHS Directive 2011/65/EU | Restricts lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE; test method IEC 62321-5:2013 may apply. |
| US FDA 21 CFR 177.1680 | May apply to polyurethane resins in food-contact use only if the specific formulation is listed; no generic food-contact approval exists. |
| Toy safety EN 71-3:2019+A1:2021 | Migration limits for elements including barium, cadmium, chromium, lead, and zinc in toy prints. |
| Density, ISO 1183-1:2019 | Test method for solid material density; used for spool weight and part mass estimation. |
| Water absorption, ISO 62:2008 | Moisture uptake of plastic after immersion; relevant to hydrolysis service boundaries. |
| Chemical resistance, ISO 175:2010 | Evaluation of dimensional and mechanical changes after contact with cleaning agents or service fluids. |
Soft-Segment Chemistry Governs Hydrolysis, Abrasion Resistance, and Low-Temperature Flexibility
In polyester-based TPU, the soft segment generally increases tensile modulus, tear resistance, and abrasion resistance, but it is susceptible to hydrolysis in hot water or humid air above 60 °C. This failure mode is accelerated by residual acid or alkali contamination. Polyether soft segments reduce moisture uptake and improve low-temperature flexibility, but can yield lower cut growth resistance and lower hardness retention at elevated temperature. The pink colorant package does not change the fundamental soft-segment chemistry, but it may interact with hydrolytic stabilizers or antioxidants in the compound. If the formulation is intended for outdoor or warm-moist service, hydrolysis aging data under ISO 62:2008 water absorption and chemical resistance data under ISO 175:2010 should be obtained before specifying this product.
For end-use components requiring repeated flexural strain, such as protective bellows, cable strain relief, footwear lattice prototypes, sealing gaskets, and vibration isolators, the pink TPU is typically considered because of high elongation, abrasion tolerance, and soft-touch deformation. However, operational boundaries apply: continuous service above 70 °C can soften elastomeric TPU and increase compression set; contact with ketones, strong alkalis, or chlorinated solvents may extract stabilizers or pigment; printed parts intended for food contact are not automatically compliant and must be evaluated under 21 CFR 177.1680 or EU 10/2011 depending on jurisdiction. Cyclic fatigue and creep behavior should be measured on printed specimens under ISO 527-2:2012 or ISO 34-1:2015 in the same orientation and temperature as the intended service. Published data for the specific Clariant pink TPU configuration is limited, so end-use qualification should rely on batch certificates, printed specimen testing, and documented processing logs rather than resin-class averages alone.
