Macherey-Nagel glass fibre filter circles MN 85/70 BF 0.6 µm

Product information "Macherey-Nagel MN 85/70 BF glass fibre filter paper circles, binder-free, 0.6 µm (25–270 mm), 45 mm"

The Macherey-Nagel MN 85/70 BF glass fibre filter circles consist of borosilicate glass microfibres without binder and without cellulose. They are 0.33 mm thick, weigh 70 g/m² and have an average retention capacity of 0.6 µm. According to the data sheet, the filtration speed is 15 s and the maximum temperature is 500 °C. Macherey-Nagel states that they are suitable for gravimetric analyses.

Glass fibre filter circles without binder and without cellulose

According to the data sheet, the filter contains neither binder nor cellulose. When ignited, the filter therefore loses no mass from binder or cellulose. For this type, the data sheet also lists a migration distance of 135 to 165 mm in 10 min.

MN 85/70 BF compared with MN 85/70 and MN 85/90 BF

Compared with the MN 85/70 with binder, the BF version is thinner at 0.33 mm instead of 0.42 mm, slightly lighter at 70 instead of 73 g/m² and can withstand up to 500 °C instead of 200 °C. Retention capacity (0.6 µm) and filtration speed (15 s) are the same. Compared with the MN 85/90 BF, which has 0.5 µm, 90 g/m² and 0.51 mm, the MN 85/70 BF retains more coarsely and is thinner. If you need the finer retention capacity, use the MN 85/90 BF.

Typical applications

Gravimetric analyses in which the filter together with the residue is dried or ignited in an oven at up to 500 °C
Filtering off solids from hot or aggressive solutions
Clarification filtration where no organic filter component is to get into the filtrate
Dust filtration in air and hot exhaust gases, for which Macherey-Nagel names binder-free glass microfibre filters in general

Available diameters

13 diameters from 25 to 270 mm are available. The table lists the pack size and the manufacturer’s item number for each diameter. The funnel or filter holder on which the filter circle rests is decisive for the choice.

Diameter	Pieces per pack	MPN
25 mm	100	4040025
37 mm	100	4040037
45 mm	100	4040045
47 mm	100	4040047
55 mm	100	404005
70 mm	100	404007
90 mm	100	404009
110 mm	100	404011
125 mm	100	404012
150 mm	100	404015
185 mm	100	404018
240 mm	100	404024
270 mm	100	404027

Technical details

All figures are typical values according to Macherey-Nagel and not a specification.

Type	MN 85/70 BF
Material	Borosilicate glass microfibres
Binder	none
Cellulose	none
Average retention capacity	0.6 µm
Grammage	70 g/m²
Thickness	0.33 mm
Filtration speed	15 s
Migration distance	135 to 165 mm in 10 min
Maximum temperature	500 °C
Surface	smooth
Colour	white
Shape	filter circle
Diameter	25 to 270 mm
Pack contents	100 pieces

Scope of delivery

1 pack containing 100 MN 85/70 BF glass fibre filter circles in the selected diameter

Individual requirements and procurement service

Suction filters, filtration units, suction flasks, filter tweezers and vacuum pumps are also available. Enquiries about accessories, other types or larger quantities are handled by our procurement service.

Diameter:	45 mm