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.

2D application
on a level surface

2D application
in a groove

3D application
on a surface

3D application
in a groove

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:

  1. FERMAPOR® K31 systems are the most suitable for sealing industrial parts
  2. The use of FERMAPOR® K31 systems is possible for almost every shape and seal geometry
  3. FERMAPOR® K31 systems achieve particularly good adhesion to parts due to the chemical reaction of the two components on the carrier material
  4. FERMAPOR® K31 systems possess exceptional long-term behaviour and display almost 100% resetting ability, even after many years of continual use
  5. 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
  6. With FERMAPOR® K31 systems even large part tolerances can easily be compensated for
  7. The FERMAPOR® K31 systems develop a cross-linked structure which is extremely resistant to environmental effects such as humidity, dust and temperature
  8. With FERMAPOR® K31 systems also sealing foams with ultra softness are possible
  9. FERMAPOR® K31systems are processed using two component metering units and can be adapted flexibly and quickly to other parts at any time
  10. 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
protection class, up to NEMA 12 protection class, low fogging, special foam
systems with outer elastic protective layer possible

The Fermapor K31 range

Fermapor® K31
A-component

Application area

Viskosity
mPas

Hardness
Shore 00

Density
g/cm3

Other properties

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

 

 

product brochure

Appliances

FERMAPOR® K31 in automotive parts

FERMAPOR® K31 in lighting products

FERMAPOR® K31 in electrical enclosures

FERMAPOR® K31 in filters