After
five year's development, Monadnock Non-Wovens announces that it has
developed a unique bonded composite of melt-blown Halar and
polypropylene. It combines the unique characteristics of polypropylene and Halar in one intimately bonded composite. "It
will have filter applications worldwide where the combination of
high-dirt holding, relatively low cost and extreme inertness for use
where chemical or radioactive attack is expected," says Monadnock's
Technical Director Rowland Griffin. "Although
primarily developed to meet demand in the liquid filtration market and
the chloro-alkalis chemical, electronic and pharmaceutical industries,
it has other potential uses in Homeland Security as personal barrier
protection or other replacement for expensive membranes such as PTFE."
Monadnock
Non-Wovens, a supplier of roll goods to the filtration industry, plans
to supply the unique composite in rolls up to 42 inches wide, with roll
diameters up to 40 inches, and nominally rated to filter between 1-20
micron.
Halar
E-CTFE is a fluoropolymer that has chemical resistance properties
similar to PTFE in that it is highly unreactive to acids, alkalis,
ozone, heat and radiation. Its ability to resist
permeation by aqueous solutions is unmatched versus other commonly used
surface webs (i.e. carbon, polyester and glass). It also has exceptional electro-negativity and offers a very smooth structure that discourages biofilm formation.
For several applications Halar`s properties, including its tolerance to pH 1-14, makes it more suitable than both PVDF and PTFE. The
polypropylene layer extends the service life under particle challenge
saving time at the filter fabricator and ensures a constant bond
between the media. This breakthrough overcomes
some of the challenges of forming layers with Halar with its
"non-stick" behavior without addition of glues or other extractables. "This
could lead to other possible uses including back-washable filter bags
or elements or even water impervious structures that allow air to pass
in battlefield equipment," says Mr. Griffin.
Contact Information
Keith Hayward
Managing Director
Monadnock Non-Wovens LLC
Pocono Mountains Business Park
Mount Pocono, PA 18344
www.mpm.com
tel: 570-839-9210
Non-Woven Media
