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Expanded TPU

Low density + High elasticity

ISOTHANE ETPU has light density and high elasticity. Even at negative temperature, it can withstands prolonged and repeated compression without permanent deformation. ETPU (expanded thermoplastic polyurethane) offers a perfect combination of soft texture and great elasticity. ISOTHANE ETPU- colorful foam beads with high elasticity, customized different color and particle size for lightening era.

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Super response : Rebound rate could be up to 63%
Low density : Density : 100-200 kg/m³
Good performance at low temperature : High elasticity and softness even at -25°C.
Anti-yellowing : Anti-yellowing material, also have non-yellowing grade.
Good abrasion resistance : Very low abrasion.
High flexing endurance : Finished goods can bear up to 120,000 bends.
Low compression set : Compressed reply is higher than 90%.
Eco-friendly material : All raw materials and processes are environment-friendly.

ETPU Foam Particles

Expanded beads can be provided with different size according to the requirements.
Molded hardness can meet different specification according to each requirement.
Stable product quality and mass production Colors TPU foam beads available.

What is the E-TPU foam beads

TPU material

Foaming and expanding

ETPU foam particles

Steam molding

The middle sole

SEM

Microsocopic cross section

COMPARISON:

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

ETPU Product

Product Specifications	Product Feature	Bulk density(kg/m³)	Pellet size(mm)	Hardness (Asker C)
6310BM	Weight lighter. Made from ether type thermoplastic polyurethane (TPU) with excellent hydrolysis resistance, high compression resistance & elasticity(>60%).	100~120	4~7	30~37
6315BM	Made from ether type thermoplastic polyurethane (TPU) with excellent hydrolysis resistance, high compression resistance & elasticity(>60%).	120~145	4~7	33~40
6315BS	Particles smaller with finer texture. Made from ether type thermoplastic polyurethane (TPU).	120~160	2~4	33~40
6315CM	Made from ether type thermoplastic polyurethane (TPU) with excellent hydrolysis resistance, high compression resistance, good energy-absorption capability.	120~145	4~7	40~47
6315DM	Made from ether type thermoplastic polyurethane (TPU) with higher hardness of finished good. For airless tire application.	130~170	4~7	60~65

* Note: These figures are for reference only. We're happy to customize products according to your specifications.

ETPU supercritical SCF physical foam

SCF supercritical fluid

Sustainable, Clean, Odorless

When the pressure and temperature of the gas above its critical point, the supercritical fluid characteristics will appear, which has properties between those of gas and liquid, and can be used as a good physical foaming agent.

▪️Injection foaming
In injection machine, the SCF blowing agent is added and mixed with polymer, and then it is injected into the mold for foaming.

▪️Autoclave foaming
First shoot TPU is injectied to a unfoamed midsole, then put the unfoamed midsole into a high-pressure autoclave Relieve pressure and foam into a foamed midsole, and then put it into a hot and cold press machine to shape.

TPU products used in the foaming field

Item	Injecting/ Autoclave foam Density (kg/m³)	Product feature
1085AU-BF	0.18~0.22 / 0.16~0.20	It has a good mechanical strength and a relatively high cost performance
3085AU-BF	0.15~0.20 / 0.12~0.17	It is made of polyether TPU, which has excellent hydrolysis resistance and good resilience (>60%)
7385A-BF	0.15~0.20 / 0.12~0.17	It is made of aliphatic polyether TPU, which has excellent hydrolysis resistance, good resilience (>60%) , and non-yellowing properties.
3090AU-BFL	0.19-0.24 / 0.16~0.21	It has excellent cushioning properties and can be used in energy-absorbing products such as protective gear and safety helmets.

* Note: These figures are for reference only. We're happy to customize products according to your specifications.

Application

ISOTHANE ETPU - Colorful foam beads with high elasticity
Suitable for footwear materials, Buffer device for sports, Bicycle saddles , Running tracks, Airless tires.

Bicycle Seats

Elaston foam provides unrivalled comfort and support on longer runs.
Patented body geometry design to assure blood flow to sensitive arteries.

Footwear Materials

Compared with traditional shoe materials, ETPU is an environment-friendly material with light density and high elasticity, good abrasion resistance, and high flexing endurance.
ISOTHANE ETPU material is suitable for the use on the soles and insoles of sports shoes because the it can absorb the impact of the ground on the soles of the feet and effectively protect our knees and heels, making each step light and elastic.
ETPU foam material developed by Greco Resin is available in various sizes and sizes could meet the needs of various complex designs. It is the latest environment-friendly choice for shoe materials.