Material Specs


High Performance Sealing Materials

At Seal Well, we know that only high performance materials can meet the demands of the marketplace today and tomorrow. For this reason, we have invested in a state-of-the-art R&D center to constantly improve our materials and seal design, thus maintaining our sealing industry leadership. The product family of polyurethanes for instance, is renowned throughout the world. This in-house expertise in the field of high performance sealing materials, combined with close co-operations with universities, has given us a competitive edge on our competitors. We offer our customers not only a wide range of class leading standard materials, but we can also develop specialist compounds to meet specific needs when required.

Classification of sealing materials

In sealing technology, mainly representatives of two groups of macromolecular (polymeric) substances are used, i.e. substances of the groups of elastomers and thermoplastics.

Macromolecular substances are organic compounds whose molecules exist of several thousands, often even millions, of atoms which are known as macro, giant, string or chain molecules. They can be created either by modification of highly molecular natural materials (e.g. natural rubber) or by depositing low-molecular elements (so called monomers) through various chemical reactions (synthetic materials, plastics).

Elastomers (ECOPUR, ECORUBBER, …)

Elastomers are materials that can be highly expanded by exerting relatively little power. Because of their structure, elastomers have high elasticity and resilience, which means the remaining deformation is very small. There are two main groups of elastomers, the chemically cross-linked materials (rubber materials) and thermoplastic elastomers.

The thermoplastic elastomers (e.g. TPU, TPE, …) demonstrate the characteristic properties of elastomers over a wide temperature range. They are physically but chemically cross-linked, therefore they can by melted at higher temperature and can be processed with traditional thermoplastic processing techniques. Thermoplastic elastomers are soluble, generally, they swell less in comparison to their chemically cross-linked equivalents.

The rubber materials or elastomers (e.g. NBR, FPM, EPDM, …) are polymers, which are formed by cross-linked macromolecules with various vulcanization additives. Due to their chemical cross-linking they do not melt and they begin to decompose at high temperatures. In addition the cross-link ensures that rubber materials do not dissolve and, depending on the medium, do suffer more or less intensive swell or shrinkage.

Thermoplastics (ECOTAL, ECOMID, ECOFLON, ECOPAEK, …)

Thermoplastics can be melted. They are polymer materials, which are essentially harder and rigid at their application temperature compared to elastomers. Depending on the chemical structure, the properties vary from hard, to stiff, to ductile and flexible. Due to the morphological structure, extensive stretching is non-reversible and moulded parts remain in the deformed state. Thermoplastics are there call plastomers.

Plastomers are mainly used as construction parts and sometimes as spring-energized sealing part as well.

Material availability restrictions

  • Thermoplastic elastomers up to Ø 4.000 mm
  • Rubber materials or elastomers up to Ø 1.500 mm
  • Plastomers & PTFE materials up to Ø 2.000 mm
 
Polyurethanes
Properties DIN-standard Unit Ecopur TPU H-Ecopur TPU G-Ecopur CPU T-Ecopur TPU S-Ecopur TPU

colour

    green red red blue black
hardness 53505 Shore A 95 ±2 95 ±2 95 ±2 95 ±2 95 ±2
hardness 53505 Shore D 48 ±3 48 ±3 48 ±3 48 ±3 48 ±3
density 53479 g/cm³ 1.20 1.20 1.20 1.17 1.24
100% modulus 53504 N/mm² ≥12 ≥13 ≥11 ≥12 17
tensile strength / yield stress 53504 / 53455 N/mm² ≥40 ≥50 ≥45 ≥50 50
elongation at break 53504 / 53455 % ≥430 ≥330 ≥280 ≥450 380
compression set 70°C / 24 h 20% Def   % ≤30 ≤27 ≤30 ≤27 25
100°C / 24h 20% Def   % ≤35 ≤33 ≤40 ≤33 30
rebound resilience 52512 % 42 29 43 50  
tear strength 53515 N/mm ≥100 ≥100 ≥40 ≥80 120
abrasion 53516 mm³ 18 17 25 15 17
min service temp   °C -30 -20 -30 -50 -20
max service temp   °C +110 +110 +110 +110 +110
               
 
Rubber Elastomers
Properties DIN-standard Unit Ecorubber 1
NBR
Ecorubber-H
H-NBR
Ecorubber 2
FPM, FKM
Ecorubber 3
EPDM
Ecosil
MVQ

colour

    black black brown black reddishbrown
hardness 53505 Shore A 85 ±5 85 ±5 83 ±5 85 ±2 85 ±2
density 53479 g/cm³ 1.31 1.22 2.30 1.22 1.52
100% modulus 53504 N/mm² ≥11 ≥10 ≥5 ≥9 ≥5
tensile strength / yield stress 53504 / 53455 N/mm² ≥16 ≥18 ≥8 ≥12 ≥7
elongation at break 53504 / 53455 % ≥130 ≥180 ≥200 ≥110 ≥130
compression set 70°C / 24 h 20% Def   %          
100°C / 24h 20% Def   %          
100°C / 22h 53517 % ≥15 ≥22   ≥15  
175°C / 24h 53517 %     ≥20   ≥15
rebound resilience 52512 % 28 29 7 38 44
tear strength 53515 N/mm 20 30 21 15 8
abrasion 53516 mm³ 90 90 150 120  
min service temp   °C -30 -25 -20 -50 -60
max service temp   °C +100 +150 +200 +150 +200
               
 
Thermoplastics
Properties DIN-standard Unit Ecotal
POM
Ecoflon 1
PTFE
Ecoflon 2
PTFE
Ecoflon 3
PTFE
Ecoflon 4
PTFE
Ecomid
PA
Ecopaek
PEEK
       
virgin
+15%GF
+5%MoS2
+40%Bronze +25%Carbon    

colour

    black white grey brown black black cream
hardness 53505 Shore D 82 57 60 64 65 77 86
density 53479 g/cm³ 1.41 2.17 2.25 3.00 2.10 1.15 1.32
tensile strength / yield stress 53504 / 53455 N/mm² 62 27 18 22 15 65 97
elongation at break 53504 / 53455 % 40 300 200 280 180 120 ≥50
modulus of elasticity - tensile test 53457 N/mm² 2600         1800 3600
min service temp   °C -50 -200 -200 -200 -200 -40  
max service temp   °C +100 +260 +260 +260 +260 +100 260
                   
 
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