Millipore glass microfiber filters without binder resin retain their structural integrity without weight loss when heated up to 500°C and can therefore be used in gravimetric analysis as well as for the filtration of hot gases.
Millipore fibrous disc glass fiber filters are available in a wide range of flow rates, pore sizes and throughput capacities. This wide variety of glass fiber filters can be sterilized by EO, gamma irradiation, or autoclaving at 121°C at 1bar.
Millipore® glass fiber filters with binder resin have superior wet strength and are excellent for qualitative analysis and prefiltration, especially for heavily contaminated liquids. Glass fiber filters with binder resin are also widely used for clarification of aqueous solutions. Millipore fibrous disc laboratory filters are available in a wide range of flow rates, thicknesses, pore sizes and throughput capacities. Glass fiber filters may be sterilized by EO, gamma irradiation, or autoclaving at 121°C at 1bar.
IW Tremont's glass microfiber filters are manufactured with 100% borosilicate glass microfiber without the use of binders or strengthening agents. These glass microfiber filters offer many advantages in a wide range of analytical applications.
The glass microfibers used to manufacture these depth filters are smooth and uniform. This permits their characteristically high flow rates while allowing retention of exceptionally small particles and high load capacity. These characteristics are particularly important in applications involving high concentrations of particulate or gelatinous substances. In choosing the appropriate filter for a specific application, careful consideration should be given to the physical form and concentration of the material to be captured by the filter.
IW Tremont Borosilicate Glass Microfiber Grades and Descriptions
The IW Tremont Multi-Density Filter Disk is manufactured with 100% binderless, borosilicate glass which features several layers of density along with a unique surface formation that speeds and optimizes filtration. These filter disks can handle botanical extraction tasks typically considered too challenging for other filter products. This unique product bridges the gap between macro and micro filtration.
Using a newly developed production method, IW Tremont produces this filter with a final retention stage selection of <0.5um to 2.7um (the same as Tremont’s binderless glass microfiber line of products). The unique filter has a built-in robust pre-filter which captures particulates from >300um and binds typically difficult to filter substances without clogging such as:
Lipids (Natural Fats, Oils and Waxes
Irregularly granular material
Viscous suspensions and slurries
These Multi-Density Filter Disks also have been optimized to meet the extreme demands of high fluidic volumes including:
Manifold Vacuum Filtration
Short Path Extraction Methods
High Fluidic Volume Filtration
Buchner Funnel Filtration
Positive Pressure Filtration
The flow and drainage rate is exceptionally rapid via the filter's highly irregular surface formation which has both high and low points which aid in the reduction of surface loading. The unique fibers which sit on the outermost sufrace of the pre-filter side are designed to extend up and add further pre-filtration structure similar to glass floss. In standing solutions, the pre-filter side resists compaction causing surface plugging found in other common filter configurations.
The filter is free of binders, glues and resins which ensures a higher-purity filtrate. They also impart very low signature or background extractables which negatively affect extract quality. This filter replaces multi pre-filtration stage products in applications where a series of pre-filters are used to prepare samples prior to membrane filtration which saves you time and reduces variability in extract signature upon analysis methods.
Lastly, the borosilicate glass microfiber construction of this filter disk is highly resistant to aggressive solvents, acids and bases with a usable range of 0 to 14pH and a wide effective temperature range of -200 to 500°C. The final filtration stage is available in the same porosity range of IW Tremont's binderless glass microfiber line of products including Grade A-83 Nano-Scale filters.
Not compatible with hydrofluoric acid solutions.
(Glass microfiber filters may become brittle and susceptible to cracking at <-100*C).