Perfection every time
Seals that are perfectly connected to the workpiece, highly elastic, precisely sized and economical: KÖPP has been supplying FIPFG sealing systems for over 15 years. In the FIPFG process (formed-in-place foam gasket), a dual-component sealing system still in its liquid pre-reaction form is applied in-situ, directly to the component in the precise contour using a robot.
The technology offers a range of options that is as wide as the sealing requirements of our customers. This means on-site technical advice is indispensable. Thanks to our experience and technical expertise, we always find the perfect solution with our customers.
KÖPP uses its unique range of dosing machine tools to apply foamed seals (FIPFG) at two locations in Germany. These systems are also used for gluing and potting. The key factors are your requirements and the technical specifications of your application. The density, reactivity and above all fluidity of the components are specifically determined to meet your needs. In simpler, two-dimensional notch applications, low-viscosity systems are used, for example. In applications that are three-dimensional or in a plane (e.g. in a switch cabinet or inverter), high-viscosity systems or thixotropic systems are used.
Application of foamed and elastomer seals, adhesives and potting materials
Application of “core-shell seals”
You can find all the FIPFG design guidelines at our Service Centre.
PUR solid rubber seals have a mixed-cell structure, which means they have very good resilience in FIPFG processes. They can withstand temperatures from -40°C to + 80°C, even 120°C for extreme applications.
The dual-component systems used at KÖPP are softener-free and have good chemical resistance. Formed-in-place PUR seals are commonly used for switch cabinets, lights and the automotive sector.
Our 2K silicone foams are suitable for applications where the temperature and chemical resistance of a silicone is required, but at the same time a seal is required that has a lower hardness due to the additional volume and has a higher compressibility to compensate for component tolerances.
Foam silicone permanently withstands temperatures of up to 180 °C and for short periods as much as 350 °C, as well as temperatures below freezing down to -60 °C. Another plus: the extremely low water absorption (<1%) makes silicone foam suitable for tropical and wet rooms. It is particularly low-fogging and UV-stable.
Flame retardant solution is available as an option. As with our 1K systems, the most complex geometries can be applied directly to the component without any problems, and rapid curing ensures speedy further processing.
Typical application examples for 2K silicone foams are seals for sterilizers, dishwashers and washing machines, control cabinets or for automotive lighting.
An increasing number of customers use the outsourcing model to stay flexible. Thanks to our large storage and logistics capacities at two locations, an increasing number of mass manufacturers outsource their process responsibilities and entrust their workpieces to us – often several hundred thousand components per year.
Our customers also make the most of our expertise in the area of potting and gluing. A thixotropic seal can be applied immediately to a circuit board during the first step, which then prevents the potting from escaping (dam and fill method). We'll be glad advise you about your options.
|Parameters||2-component PUR||4-component PUR|
|Number of components||2||4|
|Seal shape H/W||Minimum 1x2 mm*||Minimum 3x6 mm|
|Temperature resistance||-40°C to +100°C (up to +160°C for short periods)||-40°C to +100°C (up to +160°C for short periods)|
|Resistances||Very good, but must be checked for individual cases||Very good, must be checked for individual cases|
|Adhesion||Very good, opt. surface activation||Very good, opt. surface activation|
|Viscosity||Thin to thixotropic||Thixotropic|
|Compression set (24 h/50%/70°C)||To less than 3% is possible **)||<3%|
|Shore hardness||5 Shore 00 to 40 Shore A||>35 Shore 00|
|Stress-strain compression (25% compression)||5 kPa to 200 kPa||n/s|
|Tensile strength||Up to 2 MPa [N/cm²]||>800 kPa|
|Ultimate elongation||up to 400%|
|Cellular structure||Mixed-cell||Mixed-cell with closed external skin (core-shell)|
|Density (g/m³)||From 0.1 - 0.6||<0.4|
|Flame retardant, UL 94||On request||On request|
|Approved for contact with foodstuffs||Special types||-|
|EMC, anti-static||-||On request|
|Water absorption||From <3.5%, can be made hydrophobic||<3%|
|Other||Various UL 50 modes with microbicide sliding systems low-fogging systems softener-free||Skin thickness approx. 0.2 - 1 mm, good adhesion even on many metals, improved chemical resistance, Approved for contact with foodstuffs|
* Height (H) / width (W) information for thixotropic applications (see design guidelines and notch applications)
** The compression set is very good, also because it is mixed-cell. However this is a function of the temperature, the type and duration of load, see DIN standards
*** Special types available; long-term behaviour should be checked for individual cases