ZOTEK N foams are available in sheet form and can be fabricated into simple and complex shapes using a variety of methods.
Features:Outstanding Thermal Resistance to 210°CSuperior resistance to swelling by oils and fuelsLow weightHigh strength and toughnessGood chemical resistanceThermoformable
ZOTEK N B50 foam is the first product in the range of polyamide (nylon) block. Based on polyamide 6, it has a density of 50kg/m3, is available only in black and is quite rigid.
THERMAL RESISTANCE
ZOTEK N foam has a significantly higher upper operating temperature limit than most common foams. The exact limit depends on the application and duration of exposure but thermal shrinkage is not significant (< 5%) at 210°C over 24 hours.
Upper temperature limits for long term, continuous use of ZOTEKŪ N grades will be far higher than those for polyethylene or polypropylene foams but their suitability should be determined for each individual application.
COMPRESSION PROPERTIES
ZOTEK N B50 foam has greater structural rigidity than low and medium density polyethylene foams and retains much higher rigidity at elevated temperatures and when dry.
MOISTURE ABSORPTION
As with all polyamides, ZOTEKŪ N foams will absorb moisture reversibly from the environment until they reach equilibrium. This is accompanied by small dimensional changes. This reduces stiffness at low temperatures but has the benefit of increasing ductility and durability. In higher temperature applications the water is rapidly desorbed. |
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COMPRESSION SET
In seals and gasket applications, ZOTEK* N foams will continue to perform at temperatures where other foams collapse. When tested at room temperature, however, the compression set is inferior to many rubber and polyolefin foams.
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FLAMMABILITY
ZOTEK N B50 foam meets the requirements of FMVSS 302. The burning characteristics of polyamide can be further improved by incorporating a flame retardant.
THERMAL INSULATION
ZOTEK N B50 is an excellent thermal insulation material both at high and low temperatures, with its closed cell structure acting as a barrier to condensation.
CHEMICAL RESISTANCE
The chemical resistance of polyamide 6 is very good against a range of chemicals, particularly hydrocarbons, such as oils and fuels, alcohols and ketones.
FABRICATION
Polyamide foam can be fabricated in a similar way to cross-linked polyethylene foam blocks. They can be thermoformed at temperatures around 250°C. Both thermal lamination and butt-welding are possible.
APPLICATION AREAS
ZOTEK N foams will find application in a range of high temperature seals, gaskets and insulation areas in the general industrial and automotive markets.
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