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Industrial Filter Papers

We offer our customers in the manufacturing and processing industries a continuously broadening product range of specialty papers for a number of very different, technical applications. Currently approximately 150 types of technical filter papers can be purchased.

Paper types with special features have been developed for specific technical applications. For decades their use has been documented in protocols as their performance is guaranteed to give optimal results in separation.

The following overview shows some famous grades made of super-refined cellulose, cotton linters or blends,  grades with smooth or creped surface, which are available even as filter cards (weight up to 850 g/m²).

Technical Data: Smooth Surface

Grade Properties Filtration Herzberg [s] Retention of particles* [μm] Weight [g/m²] Thickness [mm]
1450nf Very fast, wet strength 50 12 – 15 118 0.30
604L Fast 12 ** 12 – 15 80 0.18
598 Medium-fast, thick 100 8 – 10 140 0.32
3205 Medium-fast 150 5 – 7 95 0.20
3427 Medium-fast, wet strength 26 ** 5 – 7 100 0.20
572 Medium-fast, wet strength 160 5 – 7 125 0.28
597L Medium-fast 170 4 – 7 81 0.17
509 Medium-fast, activated carbon 270 n.d. 145 0.43
BF Medium, wet strength 300 4 – 6 135 0.26
1577 Very slow, Very high wet strength, (hardened filter) 2000 ≤2 82 0.12

Technical Data: Creped Surface

 

 

Grade Properties Filtration Herzberg [s] Retention of particles* [μm] Weight [g/m²] Thickness [mm]
520bII Very fast, wet strength, thick 30 15 – 19 135 0.53
520b Very fast, wet strength, extra thick 30 16 – 20 155 0.65
3144L Very fast, wet strength, extra thick 30 (4,2 **) 16 – 20 190 0.65
520a Very fast, wet strength 35 15 – 18 90 0.32
2772 Very fast, wet strength 40 12 – 14 65 0.24
2410 Fast, wet strength 70 9 – 11 107 0.40
2048 Medium-fast, wet strength 135 5 – 8 149 0.65

Technical Data: Filter Card

Grade Properties Filtration Herzberg [s] Retention of particles* [μm] Weight [g/m²] Thickness [mm]
0048 Cellulose / Synthetic, low density, high break load 500 *** n.d. 130 1.00
2282 Fast, wet strength, thick 35 15 – 18 442 1.45
2294 Fast, wet strength, thick 55 8 – 15 550 1.50
2208 Fast, wet strength, thick 75 (12 **) 7 – 13 350 0.90
2589a Medium-fast, wet strength 120 6 – 12 200 0.45
5703 Medium-fast, wet strength 120 6 – 12 240 0.55
3605 Medium-fast, wet strength 120 6 – 12 310 0.80
2589b Medium-fast, wet strength 220 5 – 10 300 0.60
2589c Medium to slow, wet strength 320 4 – 8 400 0.75
22 Medium to slow, wet strength, thin 350 3 – 8 180 0.35
2589d Medium to slow, wet strength, thick 470 2 – 6 500 1.00
2589e slow, wet strength, thick 470 2 – 6 610 1,3
8272 slow, wet strength, thick 600 2 – 4 707 1,5

 

 

* Approximate values ** Gurley *** Air permeability at 50 Pa