An example of possible improvements that can be achieved with Perkalite in polypropylene is given below. With only a few weight percent Perkalite, the stiffness of the compound can be significantly increased while maintaining or even improving the impact strength. In addition the heat distortion temperature can already be raised with about 15°C by the addition of only 1 wt% Perkalite.
Perkalite F100 polypropylene nanocomposite, Moplen HP500N (ex Basell)
Flame retardant properties
Perkalite has been proven to be an effective flame retardant synergist for metalhydrates, like Magnesium Hydroxide (MDH) and Alumimum Trihydrate (ATH). An example is the possibility to get a UL-94 V0-rating in polypropylene with only 52 wt% MDH and 5 wt% Perkalite F100, while with the best MDH grades at least 65 wt% MDH is needed.
An illustration of the use of Perkalite in cable compounds is given in the figure below. Perkalite can reduce the Peak Heat Release Rate in EVA with more than 50%, enabling a reduction in ATH.
An example of the improvement of barrier properties is given in the figure below. With addition of only 3 wt% Perkalite, the barrier properties of a polypropylene cast film can be improved with more than 30%.
Perkalite has a clear influence on the rheological and crystallization behavior of polymers. As a result of this, several advantages can be achieved during polymer processing. Examples are:
- Significant faster incorporation of mineral fillers into rubber compounds, resulting in shorter batch mixing times (e.g. compounding of mineral flame retardants into EDPM rubber).
- Improved rheological properties of polyolefins for thermoforming applications, resulting in a wider processing window.
- Higher crystallization temperature of e.g. polypropylene, offering shorter mould release times during injection moulding.
The right way of processing Perkalite into polymers is of key importance to obtain the optimal performance. Perkalite can be processed in conventional compounding equipment like twin screw extruders, Buss co-kneaders and internal mixers. Although processing of Perkalite into a polymer is not difficult, Perkalite cannot be treated as a conventional filler. The main processing recommendations are to work with a masterbatch before the let-down, allow sufficient residence time in the processing equipment and use the right compatibilizer depending on the type of polymer. For processing in polyolefins it is strongly recommended to follow the recommendations as given in our technical bulletin Perkalite Processing in Polyolefins.
Food contact approval status
The use of Perkalite in articles to come into contact with foodstuffs complies with relevant EU regulations and directives.
Please click on the product list links located on the right hand navigation bar for commercially availabe Perkalite grades or contact us for additional information.