EPTU Sole Manufacturer

Huadong Sole is an entrenched Manufacturer, Exporter and Supplier offering ETPU Footwear Soles of superior quality. Contact us today to customize your ETPU outsole.

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TPU

TPU, thermoplastic polyurethane elastomer, is a block copolymer composed of diisocyanate, chain extender, and polyol. The soft segment composed of polyol shows flexibility and toughness, while the diisocyanate, as the hard segment, gives the material hardness and rigidity, and the hard segment serves as a physical cross-linking point after crystallization, making TPU show high elasticity. Therefore, TPU has significant advantages such as high tensile strength, large elongation, and low long-term compression permanent deformation.

ETPU

Compared with traditional shoe materials, ETPU (also called Expanded Thermoplastic Polyurethane and foamed TPU) is an environmentally friendly material with ultra-high elasticity, ultra-light density, high wear resistance and bending resistance. It is suitable for use in sports shoe soles and insoles, because ETPU can absorb the impact of the ground on the soles of the feet, effectively protecting our knee joints and heels, making every step light and elastic.

TPU Foam Parameters

(Comparision To Other Shoe Sole Materials )

Properties	TPU Foam	EPP	EPS	EPE	EVA	Foam PU
Density (g/cm3)	0.15-0.25	0.02-0.06	0.01-0.03	0.03-0.06	0.2-0.7	0.02-0.4
Foam structure	closed cell	closed cell	closed cell	closed cell	closed cell	cell
Flexibility	✓Excellent	fair	fair	fair	fair	fair
Re-bound	✓Excellent	good	poor	fair	fair	fair
Low temperature resistance	✓Excellent	good	good	fair	good	fair
Izod Impact	good	Excellent	poor	Excellent	fair	good
Chemical resistance	✓Excellent	Excellent	poor	good	good	fair
Mechanical properties	✓Excellent	Excellent	poor	good	fair	poor
Weatherability	✓Excellent	Excellent	poor	fair	fair	fair
Abrasion resistance	✓Excellent	good	poor	good	poor	fair
Environmental friendly	✓Excellent	Excellent	poor	Excellent	fair	poor
Rating	✓5	5	3	4	2	2

In Terms of ETPU Midsole Technology

ETPU midsole uses physical foaming. Compared with chemical foaming of EVA, it has no smell and is environmentally friendly and recyclable. It is popcorn-shaped after molding and has excellent resilience and deformation recovery, wear resistance, and resistance to wear. The wet slip performance far exceeds that of traditional EVA materials. The rebound value of ETPU foam can reach 60%, which is significantly higher than EVA. Equivalent to when the shoe rebounds after landing, the sole rebounds harder when it hits the ground, effectively reducing muscle fatigue and muscle jitter, allowing you to run farther with full power~

ETPU Molding Method

TPU Material

Foam ETPU Expanded Granules

Steam Forming Insole

Sectional Structure

Why Choose ETPU As Shoe Sole Material?

ETPU is a new material of high resilience foam particles. It can be hard or soft, wear-resistant, oil-resistant, transparent, elastic and easy to degrade.

ETPU new popcorn:
Low density, wear resistance, anti-aging, anti-yellowing, shock absorption, anti-slip properties.

Ergonomic Design

The 0.7mm off-the-ground cushioning shoe bridge has a moderate front-to-back drop, good resilience, and outstanding sports push rods and support. It can absorb the impact of ankles and knees during exercise and protect joints.

● The 0.7mm off-the-ground cushioning shoe bridge is specially designed for hiking.
● With a moderate front-to-back drop, a more outstanding sense of movement and ergonomic design.
● Ergonomic design.

The Advantage of ETPU Shoe Sole?

Full of Elasticity

This material is composed of countless elastic PU foam balls, and its elasticity is far greater than that of ordinary elastic materials. Each microsphere is equivalent to a small football with sealed microbubbles inside. The midsole of sports shoes composed of countless microspheres can absorb the impact suffered by the foot during running and convert it into energy for feedback.

Lightweight

Lighter than traditional midsole materials, weighing less than 2/3 of traditional EVA materials.

Rebound

"Popcorn" as a midsole material can store and release energy, providing more energy feedback elasticity. Compared with EVA foaming, boost has three times more energy feedback.

Natural and Environmentally Friendly

ETPU is a non-petroleum mineral derivative and is easy to degrade. It can take as short as 1-3 years to degrade and as long as 3-5 years to completely degrade. It is natural and environmentally friendly!

Cushioning

It has stronger cushioning function than traditional midsole materials, which can protect the knees more effectively during exercise!

Durability

Data show that it can maintain its original physical properties in the temperature range from minus 20 degrees to 40 degrees. It has good cold resistance, good heat resistance, and strong durability: it can maintain optimal elasticity under various temperatures. (There is almost no change between -20 and 40 degrees Celsius). The previous problem of shoe soles becoming hard in winter has been solved. Popcorn bottoms remain elastic over a wide temperature range.

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EPTU Sole Manufacturer

TPU

ETPU

In Terms of ETPU Midsole Technology