TPU - Epamould series 100 polyester base

TPU for the footwear and compounding industry

EPAFLEX was established as a system house specialised in producing polyurethane systems for the footwear industry. This tradition and vocation is reflected in the line of thermoplastic polyurethanes (TPU) designed and developed specifically for the footwear and compound industry. The thermoplastic polyurethanes manufactured by Epaflex are not only characterised by the particularity of the TPU, (wide range of hardness, flexibility and elasticity, resistance to oils, to fuels, to solvents and to chemical products), but also by a unique combination of properties, because they blend grip and rubbery hand to very low values of loss by abrasion and high values of tear resistance. The thermoplastic polyurethanes manufactured by Epaflex are, therefore, the materials which bridge the gap of characteristics between rubbers and common thermoplastic materials as well as offering excellent compatibility with numerous technopolymers and rubber. ISO 9001 certification provides a further guarantee of the excellence of our processes.

proprietà tipiche
method
unit
Density
ISO 1183
Kg/dm³
Elongation at break
EN 12803
%
Hardness Sh A
ISO 868
Shore A
Hardness Sh D
ISO 868
Shore D
Tensile strenght
EN 12803
MPa
Abrasion resistance
EN 12770
mm³
Tear strenght
ISO 34
KN/m
Glass transition temperature (Tg)*
DMA
°C
processo
Injection molding
Extrusion
caratteristiche
Semi trasparent / Opaque
FDA 21 CFR177.1680
FDA 21 CFR177.2600
EU 10/2011
ESD
Antistatic
No blooming
Trasparent
164 A 56
1.21
600
65
17
85
50
170 A 56
1.22
72
175 A 56
1.21
650
75
30
50
75
181 A 56
1.21
620
80
33
50
80
185 A 51
1.21
560
85
44
30
105
185 A 56
1.21
85
192 A 51
1.21
530
90
45
30
110
-25

Machines with a clamping pressure of no less than 150 tons and injectors with three-stage screws of a diameter between 40 and
60 mm, and an L/D ratio between 20:1 and 30:1 are recommended for injection moulding.
The use of screws with a diameter exceeding 65 mm and/or with a high compression ratio is not recommended.
In order to avoid thermal degradation of the product (local overheating of the material), it is essential to eliminate all the
possible points where stagnation may occur and check that the nozzle is heated in a uniform manner for its whole length.

Soles for safety shoes
• Excellent adhesion to the PU
• Good resistance to oils and fats
• Good shear strength
• Excellent slip resistance (HFC)
• Availability of antistatic and ESD products

Soles and inserts for sports shoes
• Excellent flexibility even at the lowest temperatures
• Optimised TPU for perfect adhesion with medium hardness products (inserts)
• Quick cycle times
• Excellent dimensional stability
• Outstanding scratch resistance

Soles for high fashion shoes
• Excellent resistance to yellowing
• Excellent definition of the mould design
• Excellent softness and rubbery hand
• Easy moulding in several colours
• Absence of blooming effect

Soles for casual shoes
• Excellent sticking properties
• Excellent slip resistance
• Quick cycle times
• Excellent dimensional stability
• Easy moulding in several colours
• Absence of blooming effect

TPU is a hygroscopic polymer and the moisture absorbed affects its processability and the physical-mechanical properties
of the moulded articles.
The granules must, be dried before use by using fan ovens,vacuum driers or dehumidifying air driers.
The percentage of moisture in the granule must be less than 0.05%.
Like TPU, any masterbatches should also be dried separately before being mixed. For the drying parameters (time and
temperature) please see our technical datasheets. The exposure of the TPU to the air for even just a few hours means
moisture absorption and forces pre-drying once again.

Epaflex TPUs must be stored in a dry place at a room temperature preferably around 20° C and in any case not at a
too high or too low temperature preferably in a ventilated, cool room.

Epaflex TPUs come in various packaging such as: 25 kg aluminized or vacuum bags and 600 kg. or 1000 kg. octabins.

Epaflex TPUs can be coloured with masterbatches.
Specific TPU-based masterbatches are recommended.
Like TPU, masterbatches should also be dried separately from the TPU before being mixed with it.

Processing waste and scraps can be re-used after having been re-granulated. In this case, it is worth checking the absence of
impurities and ensuring that the product has not undergone heat degradation.
The re-granulated product (like virgin TPU) should always be dried before being re-used.
We suggest using re-granulated TPU blended with fresh granules at a percentage of no more than 25%.

Loactaion

address

Via Circonvallazione Est, 8, 27023 Cassolnovo PV, Italy

Phone

contacts

T. (+39) 0381929521

F. (+39) 0381929523

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Epaflex Polyurethanes Spa - Società Unipersonale - Cap. Soc. € 1.000.000 i.v. - Sede legale: L.go Isabella d'Aragona 4, 20122 Milano.
Registro Imprese Milano 02144860968 - Rea Pavia 260624 - Rea Milano 1512571 - P.I. 11965210153 - C.F. 02144860968

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