Polymer nanofibrous membranes

NnF MBRANE® – PVB (Polyvinylbutyral)

Product description

NnF MBRANE – PVB (Polyvinylbutyral) is a novel kind of nanofibrous mambrane produced by industrial production technology operated by Pardam, s.r.o. in the Czech Republic. Nanofibrous layer is deposited on the top of a supporting substrate with air permeating structure made of virtually any material on customers` request – woven/nonwoven textiles, filtration paper... Combination of the grammage of nanofibrous layer and a type of supporting substrate enable manufacturing of filtration membranes with different permeability and filtration efficiency. Nanofibrous membrane posses small pore size with simultaneously high permeability due to its open fibre structure. Basic feature of this material among others is its hydrophobic – hydrophilic bivalent character, which enables to dissolve this material in alcohols, but does not allow it to swell in water. This leads to long-term biodegradable material suitable for environmentally and health-friendly applications. This material has also a great perspective for doping of fibers with various functional components with slow releasing properties, such as scents, antibacterial or medical compounds as well as any type of nanoparticles. 


SEM image, magnification: 570x
SEM image, magnification: 3200x

Physical properties

Physical form and structure

PVB NnF layer on PP support 


Material characteristics

fiber structure randomly oriented
typical fiber diameter 300-700 nm
fiber length continuous
physical form thin layer
grammage 0,5-15 g/m²
air permeability 40-400 l/min/dm²
width of the roll 0,5-1,1 m
maximum length of the roll 2000 m
melt point 200 °C
vicat softening point 180 °C

Breathable | High flux | Chemically stable with the exception of strong acids and organic solvents | Biodegradability | Peal-ability – it is possible to use nanofibrous layer without support material

Type of supporting substrate and grammage of nanofibrous layer determine the membrane permeability and filtration efficiency. Those parametres can be modified in accordance to customers demand.

Additional post treatment available:
Lamination of nanofibrous membranes (double / triple sandwich material) | Doping with functionalized particles (Ag, ZnO, TiO2... antibacterial function).

Please feel free to contact us for more info. 


Air | Liquid | Water filtration | Separation processes | Life science | Biomedical applications | Medicine carriers | Doping with liquid dopants – long time release  


Important notice:

Production of two layer polymer nanofiber membrane (combination of polymers from our portfolio) in one production step is also possible (mechanical and functional properties improvement).