Glass microfiber filters with binder
Glass microfiber filters (with binder) are mainly used either for air and gas monitoring or as pre-filters. They are manufactured with synthetic binders to ensure that the filter has a defined strength.
- mechanical and chemical stability
- temperature resistant up to 180°C
- hydrophilic or hydrophobic (depending on the binder)
Binder-free glass microfiber filters
Filters made of glass microfibers without binders are recommended for analytical and gravimetric analyzes and as prefilters. They combine high flow rates with high loading capacity and retention of very fine particles.
- produced from 100% borosilicate glass
- biologically inert, resistant to most chemicals
- withstands temperatures up to 500°C (class 550-HA up to 550°C)
Quartz microfiber filters
Microfiber quartz filters are particularly suitable for monitoring emissions at high temperatures and wherever filters of the highest purity are required. Sartorius quartz microfiber filters do not contain glass fibers or binders.
- made of 100% quartz microfiber silicon dioxide (SiO2)
- high purity filters with the lowest trace metal values
- resistance to extreme temperatures up to 900 °C
- exceptional resistance to chemicals
- biologically inert
Glass & Quartz Microfiber FAQ
Glass Microfiber Filters (without binder) are made of 100 % borosilicate and have a temperature resistance up to 500 °C or max. 550 °C; with binder, they have a lower temperature resistance up to 180°C.
Quartz microfiber filters manufactured with 100 % quartz (silica, SiO2) have the highest temperature resistance up to 900°C.
In terms of purity, you will get the highest purity with filters made 100 % of quartz, followed glass microfiber filters without binders. Binders increase the mechanical stability of the filter but reduce its purity.
Because they are all depth filters - they do not have pores, as they are made of fibres with an irregular structure. Therefore, the particle retention properties are only a rough information. Different sizes of particles are retained on the surface of the filter as well as in its depth structure. They are therefore ideal for the filtration of high loaded solutions, but they cannot be used as sterile filter for which you need a defined pore size.
Glass microfiber filters have a higher loading capacity than filter papers and are therefore better suitable as prefilters; they will not clog easily.
One side of the filter is smoother than the other one, due to manufacturing processes. Because of the irregular fiber structure of depth filters, you can use any side for filtration and obtain the same results.
