TPU - Epamould series 700 polyether base

TPU for technical moulding

Thermoplastic polyurethane is an innovative technical material with characteristics which make it suitable for many applications in the plastics industry. Technical injection moulding is one of the most widely used and varied applications in which Epaflex TPU products find their natural habitat thanks to their versatility and range of use. Epaflex produces TPU products which guarantee constant quality and ease of processing which meet the needs of the most complex and state-of-the-art applications. In addition to the traditional features of TPU such as the wide spectrum of hardness, flexibility and elasticity, resistance to oils and greases, to combustible substances, solvents and chemical products and its well documented resistance to abrasion, there are also other properties which are particularly important for moulding. 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
Compression set 22h/70° C
ISO 815
%
Compression set 70h/23°C
ISO 815
%
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
Pigmented
Trasparent
745 D 15
1.16
390
41
45
35
140
756 D 15
1.17
370
55
45
45
160
780 A 15
1.11
570
81
38
30
85
785 A 15
1.11
550
83
40
30
90
35
23
-42
790 A 15
1.12
490
87
40
35
100
-40
795 A 15
1.12
470
89
43
35
105
36
24
-43

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%.

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.

• Mechanical items
• Industrial components
• The mining industry
• Consumables
• Wheels, rollers
• Transmissions
• Transport
• Agriculture and gardening
• Automotive components

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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