| Melt blown fiber from PP generally requires
very good flow. So far, 800 MFR grade first developed
by Exxon Mobil was considered to be the work horse
for melt blown PP fiber.
Basell, the world leader in PP, with more than
5.5 to 6 million tons capacity of PP, has recently
introduced a grade that has MFR of 1500 and therefore
has excellent flow behaviour. This new grade can
offer advantages in production of thin fibers
or micro fibers. It can also produce fibers with
softer feel. It has improved barrier properties
such as hydrohead that can be achieved at much
lower processing temperatures with significant
cost savings in the melt blown process compared
to standard high fluidity resins. The lower processing
temperature is expected to be beneficial during
production of coloured melt blown nonwovens, as
it can minimize organic pigment degradation and
improve processability .
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