Suitable for Soft Rubber parts, protective sleeves, cushioning parts, sealing auxiliary parts, rubber overhangs, wear-resistant elastic parts, soft housings, foot pads, rollers, and injection-molded elastic materials requiring a flexible touch.
Rubber-Like TPU is a thermoplastic polyurethane elastomer material that combines the elasticity of rubber with the injection molding of plastic, offering good elasticity, wear resistance, tear resistance, oil resistance, impact resistance, and tactile feel. Rubber-Like TPU are commonly used in Soft Rubber housings, protective covers, sealing rings, shock absorbers, foot pads, rollers, soft buttons, rubber parts, sports equipment, cable sheaths, and plastic parts requiring a soft touch or elastic cushioning. Compared to ordinary rubber, Rubber-Like TPU is more suitable for mass injection molding and complex structural molding; Compared to hard plastics such as Polypropylene (PP), ABS, and Polycarbonate (PC), Rubber-Like TPU is softer and better suited for elastic contact and protective cushioning scenarios.
By focusing on application scenarios, boundaries of advantages, and non-recommended scenarios, it helps sales, customer service, and quoting staff quickly determine whether the material meets current part requirements.
Good elasticity, good wear resistance, tear resistance, impact resistance, soft feel, good oil resistance, can be injection molded, can be made transparent or semi-translucent, suitable for overmolding and combining hardness and softness, ideal for cushioning and shock absorption, and surface protection.
Mobile phone protective cases, electronic product Soft Rubber casings, sports equipment accessories, soft keys, foot pads, anti-slip pads, sealing rings, cushioning pads, shock absorbers, rollers, rubber wheels, cable sleeves, hose connectors, tool handles coated with rubber coating, soft shells for medical devices, automotive interior Soft Rubber parts, footwear material components, wearable device straps, and soft contact parts for fixtures.
High-rigidity structural parts, high-strength load-bearing parts, high-precision long-term dimensional stabilization parts, high-temperature long-term use parts, high conductivity parts, high thermal conductivity parts, high-gloss hard appearance parts, strong acid and strong alkali environment parts, long-term outdoor exposure without weather-resistant modification, parts requiring rigid threaded connections, and extremely low-cost ordinary hard plastic parts.
The following parameters come from product information and material knowledge fields, used for design review, quotation communication, and preliminary judgment before material selection.
| Material positioning | Suitable for Soft Rubber parts, protective sleeves, cushioning parts, sealing auxiliary parts, rubber overhangs, wear-resistant elastic parts, soft housings, foot pads, rollers, and injection-molded elastic materials requiring a flexible touch. |
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| Precision performance | Injection molding Rubber-Like TPU can meet the batch molding precision of ordinary Soft Rubber and elastic parts, but because the material is soft, highly elastic, and exhibits obvious shrinkage and demolding deformation, dimensional stability is usually not as stable as hard plastics such as ABS, Polycarbonate (PC), and Acetal (POM). The lower the hardness, the harder it is to control the size; The higher the hardness, the better the stability of assembly and processing. Precision assembly positions, rubber boundaries, sealing surfaces, and plug-in structures should be verified through mold trials to verify actual dimensions and rebound status. |
| Dimensional tolerances | Conventional dimensional tolerances for injection molding Rubber-Like TPU can be referenced ± 0.15mm to ±0.40mm, making small size, high hardness, and simple structure easier to control; Low-hardness Soft Rubber parts, large-sized parts, thin-walled parts, elongated parts, overmolded parts, and complex elastic structures may have deviations of ±0.40mm-±1.00mm or more. These values are standard reference ranges and are not absolute guaranteed tolerances for all structures. It is recommended to define tolerances separately for sealing positions, overmolding boundaries, assembly holes, and snap structures and verify them through sample parts. |
| Minimum Wall Thickness | Injection molding Rubber-Like TPU recommends a minimum wall thickness of no less than 0.8mm-1.0mm. For low hardness Rubber-Like TPU it is not recommended to make large areas too thin, otherwise filling may become unstable, deformed, tear, or difficult to demold. Ordinary Soft Rubber enclosures and protective sleeves can be designed with thinner areas according to hardness, but the load-bearing, overhanging, sealing, and assembly positions should be appropriately thickened. |
| Recommended wall thickness | For ordinary Rubber-Like TPU Soft Rubber parts, 1.2mm-3.0mm is recommended; protective covers, foot pads, cushioning pads, and soft housings are recommended 1.5mm-4.0mm; rollers, shock absorbers, sealing auxiliary parts, and compression-bearing positions are recommended to be above 2.0mm. The final thickness should be determined based on hardness, compression amount, springback, assembly space, and operating load. |
| Minimum aperture | For injection molding Rubber-Like TPU small holes, the recommended hole diameter is no less than 1.0mm-1.5mm. Low hardness Rubber-Like TPU small holes are prone to unstable hole size due to shrinkage, deformation, or demolding stretching. Deep small holes and elongated holes require evaluation based on mold insertion needle strength, venting, demolding method, and material hardness. Assembly holes, wire holes, and sealing holes should consider material springback and long-term deformation, and appropriately enlarge the hole size if necessary. |
| Assembly clearance | For ordinary Rubber-Like TPU assembly, it is recommended to reserve 0.20mm-0.50mm on one side; Soft Rubber wrapping, inserting, and elastic press-in structures can be designed with appropriate interference according to hardness and compression amount. Low hardness Rubber-Like TPU can achieve a tight fit using elasticity, but long-term stress may cause creep loosening; High-hardness Rubber-Like TPU assembly gaps should be avoided to prevent overtight assembly difficulties, edge tearing, or permanent deformation. Sealing structures should have separate gaps designed based on compression rate and resilience. |
| Detailed performance | Injection molding Rubber-Like TPU can achieve ordinary textures, logos, rib positions, grooves, Soft Rubber edge wrapping, anti-slip textures, and shallow relief details, but the detail clarity is not as high as that of hard plastics like ABS, Polycarbonate (PC), and Polybutylene Terephthalate (PBT). For raised text, recessed text, and anti-slip textures, it is recommended to be no less than 0.4mm-0.8mm. Low hardness Rubber-Like TPU details are prone to rounding, softening, or delamination and scratching; High hardness Rubber-Like TPU clearer details. Appearance identification can be achieved through mold textures, laser engraving, silk screen printing, pad printing, or hot pressing. |
| Surface effect | Injection molding Rubber-Like TPU can achieve transparent, semi-transparent, milky white, black, or various color effects, with surfaces that can be matte, fine-grained, matte, leather-textured, or soft to the touch. Transparent Rubber-Like TPU have a certain translucency but may turn yellow due to long-term use due to UV exposure, sweat, oil stains, or thermal aging. Matte Rubber-Like TPU suitable for non-slip and tactile parts; high-gloss Rubber-Like TPU easily shows scratches and fingerprints. For high-end appearance Soft Rubber, focus should be placed on controlling material transparency, flow marks, color differences, surface particles, and packaging indentations. |
Based on material characteristics and suitable product ranges, customer needs are broken down into easier application directions to determine.
Mobile phone protective cases, electronic product Soft Rubber casings, sports equipment accessories, soft keys, foot pads, anti-slip pads, sealing rings, cushioning pads, shock absorbers, rollers, rubber wheels, cable sleeves, hose connectors, tool handles coated with rubber coating, soft shells for medical devices, automotive interior Soft Rubber parts, footwear material components, wearable device straps, and soft contact parts for fixtures.
Suitable for Soft Rubber parts, protective sleeves, cushioning parts, sealing auxiliary parts, rubber overhangs, wear-resistant elastic parts, soft housings, foot pads, rollers, and injection-molded elastic materials requiring a flexible touch.
The core features of injection molding Rubber-Like TPU are elasticity, wear resistance, and a soft touch, making them suitable for products that require Soft Rubber protection, cushioning, anti-slip, sealing assistance, and a tactile overmolding feel. Rubber-Like TPU has a wide hardness range, allowing selection from softer to harder according to Shore A or Shore D hardness. Different hardness levels significantly affect hand feel, rebound, processing difficulty, and assembly performance. Rubber-Like TPU has good wear resistance and tear resistance, but long-term stress can cause some creep or permanent compression deformation. High temperatures, ultraviolet rays, oils, and chemical media also affect material lifespan.
Based on wall thickness, hole position, assembly clearance, dimensional tolerances, and material usage risks, determine in advance whether the part structure is suitable for Rubber-Like TPU.
Post-processing of Rubber-Like TPU affects appearance, dimensions, hole position, assembly clearance, and usage validation results, and should be explained in advance during quotation, DFM review, and sample confirmation stages.
Post-processing should focus on appearance display, dimensional fitting, connection assembly, and testing verification. Parts involving assembly positions need to be reserved in advance for machining, coating, and trial assembly allowances.
For common issues such as threads, snaps, strength, temperature resistance, and weather resistance, identify in advance whether the material needs to be replaced or if another processing method should be used.
When customer demand exceeds Rubber-Like TPU material boundaries, it is necessary to combine strength, temperature resistance, toughness, long-term stability, and mass production goals to promptly recommend alternative materials or processing technologies.
If lower-cost Soft Rubber parts are needed, TPE or soft Polyvinyl Chloride (PVC) can be chosen; If higher temperature and chemical resistance are required, Silicone Rubber, fluororubber, or specialty elastomers can be chosen; If higher rigidity and dimensional stability are required, Acetal (POM), Polycarbonate (PC), ABS, or Nylon (PA) can be chosen; If better weather resistance and outdoor stability are needed, weather resistance Rubber-Like TPU, TPE E, or specialized rubber can be chosen; If higher wear-resistant rollers are needed, high-hardness Rubber-Like TPU, PU castable materials, or nylon/Acetal (POM) structural components can be chosen.
If customers require a soft tactile feel, drop protection, wear resistance, slip resistance, cushioning, shock absorption, or soft-hard bonding overmolding, injection molding Rubber-Like TPU is an excellent choice. If customers require high rigidity, high-precision assembly, long-term high-temperature loading, or low-cost rigid housings, it is not recommended to prioritize Rubber-Like TPU; instead, ABS, Polycarbonate (PC), Polypropylene (PP), Acetal (POM), Nylon (PA), or metal materials should be considered. When selecting Rubber-Like TPU, first confirm hardness, color transparency, wear resistance requirements, resilience requirements, operating temperature, contact medium, and whether adhesive bonding is needed.
After uploading 3D/2D drawings and supplementing materials, quantities, tolerances, surface treatments, and delivery requirements, XPartsLab will provide next steps in 3D printing manufacturability, cost, and delivery pathways.
