FERMAPOR K31
two-component polyurethane systems for the manufacture of flexible foam seals with FIPFG technique.
Tailor-made chemistry for growing requirements.
FERMAPOR K31 is the trade name for Sonderhoff’s two-component polyurethane systems for the manufacture of flexible foam seals which are foamed directly onto the part by using FIPFG (formed-in-place foam gasket) technology. The systems consist of a resin (A-component) and a hardener (B-component) which are mixed together at a prescribed ratio. This produces a flexible sealing foam within a few minutes.
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2D application | 2D application | 3D application | 3D application | |||
Thixotropic (pasty) sealing systems are preferentially used which, depending on the degree of viscosity, form a seal body with a height/width ratio from 1 : 2,5 to 1 : 1,5. | Fluid sealing systems, which are self-levelling over joints, are usually used in this case. This allows smooth seamless seals to be created. | Thixotropic (pasty) sealing systems are preferentially used which, depending on the degree of viscosity, form a seal body with a height/width ratio from 1 : 2,5 to 1 : 1,5. Use is possible even with extreme slopes up to vertical application. | Thixotropic (pasty) sealing systems are used most often in this case. Seal application is also possible even with extreme slopes. |
After curing has finished the sealing foam is tack-free and the part can be assembled. The sealing function is reached with a compression of approximately 30 – 60 % of the cured seal. The flow behaviour, reactivity and colour of the components are freely adjustable depending on the intended use. Sonderhoff can exploit the experience gained from more than 1000 Fermapor K31 formulations.
10 good reasons for using FERMAPOR K31:
- FERMAPOR K31 systems are the most suitable for sealing industrial parts
- The use of FERMAPOR K31 systems is possible for almost every shape and seal geometry
- FERMAPOR K31 systems achieve particularly good adhesion to parts due to the chemical reaction of
the two components on the carrier material - FERMAPOR K31 systems possess exceptional long-term behaviour and display almost 100% resetting ability, even after many years of continual use
- FERMAPOR K31 systems will become tack-free at room temperature in 2 – 20 minutes and an oven can reduce the reaction time considerably, but it is not a necessity
- With FERMAPOR K31 systems even large part tolerances can easily be compensated for
- The FERMAPOR K31 systems develop a cross-linked structure which is extremely resistant to environmental effects such as humidity, dust and temperature
- With FERMAPOR K31 systems also sealing foams with ultra softness are possible
- FERMAPOR K31 systems are processed using two component metering units and can be adapted flexibly and quickly to other parts at any time
- By using FERMAPOR K31 systems even small product series become profitable
FERMAPOR K31 - The components
FERMAPOR K31 sealing foams consist of a liquid to paste-like A-component (polyol) and a resin, the B-component (MDI isocyanate).
FERMAPOR K31 - The reaction process
The reaction of FERMAPOR K31 sealing foams is initiated by mixing the A and B components. This results in a chemical reaction which proceeds steadily at room temperature. The applied mass foams equally in all dimensions to form the gasket. 
FERMAPOR K31 - The foaming process
- Mixing time: is the time period in which the A and B components are mixed.
- Reaction time: is the time period in which the FERMAPOR K31 foam system begins to react
(after approx. 15 – 60 seconds). - Rise time: is the time period in which the FERMAPOR K31 foam system expands to form the seal body (after approx. 15 – 180 seconds).
- Tack-free time: is the time after which the seal surface of FERMAPOR K31 foaming systems is tack free at room temperature and can be touched without causing damage (after approx. 2 – 20 minutes).
- Assembly time: is the time point after which FERMAPOR K31 foaming systems can bear loads or the sealed components can be assembled (after approx. 20 minutes – 12 hours).
Processing informations
FERMAPOR K31 systems are processed using two component mixing and metering machines. The recommended processing temperature is + 23 ± 5 °C. Most of the FERMAPOR K31 components can be stored in the original packaging and for at least 6 months at temperatures between + 10 and + 40 °C.
Physical and chemical Properties
Property | FERMAPOR K31 |
Appearance | black or grey, other colours upon request |
Hardness | from 5 Shore 00 to 40 Shore A possible |
Compression load deflection | 5 kPa to 200 kPa (at 25% compression) |
Density | from 0,1 g/cm³ to 0,6 g/cm³ |
Temperature resistance | from – 40 °C to + 100 °C (short time up to + 160 °C) |
Tensile strength | up to 2 MPa [N/cm²] |
Elongation at break | up to 400 % |
Compression set (DVR) | > 97 % depending on test conditions |
Water absorption | from < 3,5 %, hydrophobic versions available |
Flame retardancy | flame retardancy up to UL-94 HF-1 possible |
Other properties | E.g. antimicrobial finish, lubricated, suitable for food packaging, up to IP68 |
Die Fermapor K31 Palette
FERMAPOR K31 | Anwendung | Viskosität | Härte | Raumgewicht | weitere Eigenschaften |
A-9854-7 | Lighting | 900-1.200 | 30-45 | 0,30-0,40 | self-levelling, high tightness, very good compression set |
A-9652-11-VP2 | Lighting | 1.000-1.600 | 30-45 | 0,20-0,40 | spec. product for moisture-proof luminaires, good levelling |
A-9020-5 | Enclosures | 45.000-65.000 | 45-55 | 0,25-0,30 | UL-50 listed and good adhesion to paint |
A-9021-2-VP1 | Enclosures | 37.000-52.000 | 35-50 | 0,25-0,35 | UL-50 and UL-94 HBF listed |
A-9230-2-VP | Enclosures | 40.000-50.000 | 55-65 | 0,30-0,40 | UL-50 listed, hydrophobic, good compression set / adhesion to paint |
A-9021-2-UL6 | Enclosures | 1.500-2.500 | 60-70 | 0,35-0,50 | UL-50 and UL-94 HBF listed |
A-9160-VP3 | Enclosures | 18.000-22.000 | 43-53 | 0,20-0,30 | high mech. strength, low friction, optimized against shear stress |
A-9025-2-VP2 | Enclosures | 38.000-50.000 | 25-40 | 0,20-0,30 | ultra soft, UL-50 listed, good adhesion to paint |
A-9550-VP2 | Enclosures | 2.000-4.000 | 40-50 | 0,22-0,40 | special product for high-pressure dispensing machines |
A-9020-15-F | Filters | 50.000-65.000 | 50-60 | 0,20-0,30 | antimicrobial, qualified for air conditioning plants |
A-9020-VP299-1 | Filters | 58.000-68.000 | 45-57 | 0,25-0,40 | for inverse height/width ratio |
A-9808 | Filters | 800-2.000 | 40-50 | 0,20-0,35 | for smallest groove applications (2 mm) |
A-9675-2-VP | Automotive | 1.000-2.500 | 35-75 | 0,25-0,50 | high tightness, hydrophobic, extremly good compression set |
A-9260-2 | Automotive | 40.000-60.000 | 20-30 | 0,15-0,30 | very soft, low assembly force |
A-9308-5-VP5 | Automotive | 130.000-200.000 | 35-45 | 0,25-0,40 | product for upside-down application, high mech. strength, hydrophobic |
A-9675-20-VP3 | Automotive | 1.500-2.500 | 45-55 | 0,35-0,60 | special product for high-pressure dispensing machines |
A-9212-3-VP | Automotive | 53.000-65.000 | 50-65 | 0,35-0,50 | high tightness, hydrophobic, extremly good compression set |
A-9199-29-VP3 | Automotive | 45.000-60.000 | 20-35 | 0,20-0,30 | high tightness, low assembly force and high mechanical strength |
A-9199-28-VP4 | Automotive | 35.000-45.000 | 40-70 | 0,30-0,50 | good adhesion to galvanized surfaces, hydrophobic |
A-9575-3 | Automotive | 1.000-1.500 | 40-70 | 0,30-0,50 | special component for automotive lighting products |
A-9575-3LE | Automotive | 1.000-1.500 | 60-70 | 0,35-0,50 | low emission, approved according to VW50180, VDA277 / DIN75201-B |
A-9828-1 | Packaging | 1.800-2.700 | 60-75 | 0,30-0,40 | highly elastic, for highest tightness requirements, good compression set |
A-9843-8-VP2 | Packaging | 7.000-15.000 | 55-75 | 0,30-0,40 | good cost performance ratio, good compression set |
A-9762 | Packaging | 5.000-8.000 | 60-75 | 0,25-0,40 | approved for food packaging |
A-9370-VP5 | Appliances | 60.000-80.000 | 7-30 | 0,15-0,35 | hypersoft, for use at ceramic stove tops |
The data contained in this publication are based on our current knowledge and experience. In view of the many factors that may affect processing and application of our product, these data do not relieve processors from carrying out their own investigations and tests; neither do these data imply any guarantee of certain properties, nor the suitability of the product for a specific purpose. It is the responsibility of the recipient of our products to ensure that any proprietary rights and existing laws and legislation are observed.
