Material Specs |
High Performance Sealing Materials
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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. |
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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). |
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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. |
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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. |
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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
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colour |
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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 |
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% |
≤30 |
≤27 |
≤30 |
≤27 |
25 |
100°C / 24h 20% Def |
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% |
≤35 |
≤33 |
≤40 |
≤33 |
30 |
rebound resilience |
52512 |
% |
42 |
29 |
43 |
50 |
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tear strength |
53515 |
N/mm |
≥100 |
≥100 |
≥40 |
≥80 |
120 |
abrasion |
53516 |
mm³ |
18 |
17 |
25 |
15 |
17 |
min service temp |
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°C |
-30 |
-20 |
-30 |
-50 |
-20 |
max service temp |
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°C |
+110 |
+110 |
+110 |
+110 |
+110 |
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colour |
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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 |
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% |
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|
|
|
|
100°C / 24h 20% Def |
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% |
|
|
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|
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100°C / 22h |
53517 |
% |
≥15 |
≥22 |
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≥15 |
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175°C / 24h |
53517 |
% |
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|
≥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 |
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min service temp |
|
°C |
-30 |
-25 |
-20 |
-50 |
-60 |
max service temp |
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°C |
+100 |
+150 |
+200 |
+150 |
+200 |
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virgin |
+15%GF
+5%MoS2 |
+40%Bronze |
+25%Carbon |
colour |
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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 |
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1800 |
3600 |
min service temp |
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°C |
-50 |
-200 |
-200 |
-200 |
-200 |
-40 |
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max service temp |
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°C |
+100 |
+260 |
+260 |
+260 |
+260 |
+100 |
260 |
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