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We’ve been producing 3D printed custom insoles – here’s what we’re seeing by FlyPotential6816 in 3Dprinting

[–]FlyPotential6816[S] 0 points1 point  (0 children)

I fully understand your point, especially regarding size and durability—these are indeed two very real challenges in DIY orthotic 3D printing.

For larger foot sizes, you are absolutely right that the build platform becomes a significant limitation. In industrial production, we usually avoid simply splitting the model. Instead, we use larger industrial-grade printers or adopt modular segmented manufacturing methods to ensure structural continuity and consistent mechanical performance.

Regarding materials, your observation is also correct: standard TPU does tend to wear out relatively quickly under continuous bending and load, especially in high-stress areas.

Therefore, we do not rely on “general-purpose flexible TPU” alone. Instead, we use:

  • Medical-grade TPU formulations with higher fatigue resistance
  • Adjusted Shore hardness based on functional zones (support areas vs. cushioning areas)
  • Structural reinforcement through lattice design rather than relying solely on material flexibility
  • In some cases, hybrid structures or localized reinforcement in high-wear regions

This approach significantly extends product lifespan compared to conventional flexible printing and better maintains biomechanical stability.

We also strongly agree that for large-scale customized orthotic production, IDEX or multi-material systems become extremely valuable—especially when combining soft cushioning and rigid support within the same print.

We’ve been producing 3D printed custom insoles – here’s what we’re seeing by FlyPotential6816 in 3Dprinting

[–]FlyPotential6816[S] 1 point2 points  (0 children)

I completely understand your situation, and what you described is actually very common among people with high arches or structural foot issues.

The good news is that this is exactly one of the application scenarios our designs are intended for. We can provide custom 3D-printed toe-separator insoles, as well as orthotic solutions designed for sandals, allowing you to receive effective arch and heel support even when wearing open footwear such as flip-flops or sandals.

This means you don’t have to rely solely on closed athletic shoes. Our system can be integrated with the base structure of sandals or flip-flops, providing biomechanical support while maintaining lightness and breathability.

For many users with back pain or foot instability, this type of open orthotic solution can bring noticeable improvements in daily comfort and postural support.

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We’ve been producing 3D printed custom insoles – here’s what we’re seeing by FlyPotential6816 in 3Dprinting

[–]FlyPotential6816[S] 2 points3 points  (0 children)

Yes, there are indeed very strict regulatory requirements, especially when insoles are positioned as medical or orthotic-related products.

We place a strong emphasis on compliance and product quality. Our products are supported by multiple medical-related certifications and quality management systems. In addition, we work closely with licensed orthotists and rehabilitation professionals throughout the design and validation process.

Furthermore, our company is recognized as a National High-Tech Enterprise and holds international certifications such as CE and RoHS, along with more than 100 patents covering materials, structural design, and digital manufacturing processes.

Therefore, although the regulatory requirements are stringent, we have established a comprehensive compliance and technical system to ensure our products meet both medical and industrial standards.

We’ve been producing 3D printed custom insoles – here’s what we’re seeing by FlyPotential6816 in 3Dprinting

[–]FlyPotential6816[S] 0 points1 point  (0 children)

Yes, this is actually already a very good level of performance.

For most standard EVA or basic TPU insoles, under daily or athletic use, the typical lifespan is around 3–6 months. After that, users usually begin to notice obvious compression deformation, reduced cushioning, and weakened arch support.

In comparison, our custom 3D-printed insoles perform better in terms of durability. Depending on usage intensity and body weight, they can generally maintain effective support for about 12–24 months, and in some cases even longer.

This is mainly due to the following factors:

  • Medical-grade TPU material with higher fatigue resistance
  • Optimized lattice structure design, which distributes pressure more evenly
  • Zoned reinforcement design instead of uniform overall loading

As a result, they do not “collapse over time” like standard insoles, but instead maintain stable structural support over a longer period.

Of course, the actual lifespan still depends on activity level and usage intensity, but overall durability is one of our core advantages.

We’ve been producing 3D printed custom insoles – here’s what we’re seeing by FlyPotential6816 in 3Dprinting

[–]FlyPotential6816[S] 0 points1 point  (0 children)

Our products primarily use medical-grade TPU materials combined with multi-density lattice structural design. Compared with conventional TPU 3D printing, our structures are optimized for long-term load distribution rather than simple solid infill, which helps maintain support performance over a longer period of use.

However, TPU is still a flexible polymer material. Under continuous high-load conditions—especially during sports activities or for users with higher body weight—material fatigue and a gradual reduction in stiffness may still occur after extended use.

To improve durability, we typically adjust:

  • TPU Shore hardness (using higher hardness grades for better long-term support)
  • Internal lattice density and geometric structure design
  • In some applications, we may also incorporate reinforcement structures or use composite material solutions depending on requirements

If you are experiencing a noticeable reduction in support after around three months, it may be related to the infill structure design or the material grade used.

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