02-Dec-22
BASF's thermoplastic polyurethane (TPU), is used as a filament by the duro3D paver in the production of individual shoe insoles using 3D printing processes. In sole applications, the material is characterized above all by its excellent vibration damping and resilience. Under heavy use, e.g. when used in sports shoes, it is also the abrasion resistance that makes the sole durable and comfortable to wear. Even with fluctuating temperatures, the insert retains its desired properties.
An excellent matching of the thermoplastic material to the challenges of discontinuous extrusion in 3D printing (FDM) makes it possible to map macrostructures of different densities in a sole, which in turn are - also selectively - tailored to very individual needs. Thus, soft sole areas with lower filling density can relieve and flow smoothly into another area, which rather firmly supports and stabilizes the foot with higher filling density.
Usually, TPU of 85 Shore A (soft) and 95 Shore A (hard) are used in orthopaedic insoles to support the entire skeleton, but also in insoles for sports shoes, where a special load cushioning or support is desirable due to increased footwork. The open grid structure of the material also makes the sole breathable.
通过所谓的平滑，即，通过流动的生产，完全避免了鞋底两个硬度区域之间的线性过渡，完全避免了硬边缘，过渡区域的宽度是可定制的。这充分证明了巴斯夫TPU的Elastollan的完整应用灵活性
The production of shoe soles made of TPU filaments enables complete and comprehensive recyclability. In contrast to commercially available milled soles made of foam materials, the material can simply be mechanically shredded, re-extruded and granulated after the use cycle. Used deposits are combined with the production surplus according to type and completely recycled by a recycler.
通过制作鞋垫来测量，材料可以大大保存。仅使用最终所需的材料。结果，生产几乎没有盈余。
A production of the soles with thermoplastic polyurethane based on renewable raw materials is also conceivable in principle.
Source: BASF
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