Gabriel-Chemie has developed three new product groups of halogen-free, flame retardant additive masterbatches for various areas of application and processing:
One of them is Maxithen PP7A9850FR for thick-walled polypropylene (PP) applications. This fully halogen-free flame-retardant masterbatch fulfills the frequently requested flame retardance classifications in Europe in conjunction with advantages in mechanical strength. These include, for example, DIN 4102 B1, UL 94 V2 and also various flame retardance tests with a vertical test as in the case of cable conduits. The recommended addition rates range from 8 to 15%.
The lower concentration of flame retardant gives rise to the following advantages: improvement of the mechanical properties, easier processability and higher flexibility in the colouring, the use of other additives and the selection of polymers.
The second masterbatch is Maxithen PP7AA1940UVFR for thin-walled PP applications. The masterbatch is a combination of flame retardant and UV stabiliser. It can also be used with a wall thickness of over 150µm without loss of quality. The recommended added amounts lie between 7% and 15%. Higher LOI values are also achieved with these dosage recommendations. Fibres, tapes and films made of PP are typical applications.
Flame retardance standards such as DIN 4102 B2/B1, UL94 VTM 0/2 and FMVSS302/DIN75200 are fulfilled with the halogen-free flame-retardant Maxithen HP7AA1460FR masterbatch for thin-walled polyethylene (PE) applications (LDPE, LLDPE or HDPE). It contains effective flame-retardant additives that do not impair the transparency of the final article. Maxithen HP7AA1460FR is said to exhibit good effectiveness even with wall thicknesses of up to 500µm. Depending on the wall thickness and the melt-flow index of the polymer, added amounts of 3.5 to 8% are recommended in order to achieve flame retardance class DIN 4102 B2, while 9 to 13% are usually sufficient for DIN 4102 B1. Higher LOI values are also achieved with these dosage recommendations. Films and tapes can be named as typical areas of application.
Films and tapes can be named as typical areas of application of the new flame-retardant masterbatch for thin-walled PE applications. (photo: Gabriel-Chemie)
