Filter Sheets
ErtelAlsop has been manufacturing cellulose based depth filter pads, or sheets for a wide range of applications in the pharmaceutical, chemical, cosmetic, flavor and fragrance, electric utility, and food and beverage markets since 1920. Formulations for these filter pads have evolved over time to suit the changing demands of our customers and the increasing need for low cost, highly efficient filter media. By using a unique blend of cellulose pulp and various filter aids, ErtelAlsop is positioned to offer the widest variety of filter media grades available.
ErtelAlsop offers the widest varieties of filter media available including 100% cellulose filter sheets, cellulose and diatomaceous earth, cellulose and perlite, and cellulose, diatomaceous earth, and activated carbon. Our pharmaceutical grade media is manufactured to the stringent controls of our Drug Master File located at CDER and is supported by ErtelAlsop Validation Guide for Pharmaceutical Grade Depth Filters.
Available Products
Alpha-Media - 100% Cellulose
L Series Micro-Media - High Purity Cellulose
XL Series Micro-Media - CelpureŽ High Purity Diatomaceous Earth
LXL Series' Micro-Media - CelpureŽ & High Purity Cellulose
Micro-Clear - Cellulose, D.E. & Activated Carbon
Pharmaceutical Grade Filter Sheets
Specifications & Features
Depth Particle Retention
From 15 microns nominal down to 0.25 microns nominal with the ability to retain smaller than 0.25 micron particles..
Sizes Available
Over 300 precision dies are available to fit virtually any filter press.
High Solids Loading
Filter pads provide high solids loading due to the large internal surface area and void volumes present within the matrix of fibers and filter aid which comprise the filter pad. This extends filter life and provides greater throughput.
High Efficiency and Zeta-Potential
Zeta-Potential allows for the retention of negatively charged particles smaller than the rated pore size of the filter media over a wide pH range.
The matrix of fibers and filter aids can be manipulated so as to improve the retention qualities of the filter sheet, thereby prolonging membrane life when media selection is optimized. This, in combination with the positive charge inherent in ErtelAlsop's Micro-MediaŽ, provides excellent particle retention efficiency.
Wide Compatibility
The basic components of filter pads, cellulose and/or filter aid, are natural products which have a wide range of compatibility. Therefore, the need for various product formulations is minimized, and limited to only those that provide specialized separation qualities. Additionally, ErtelAlsop uses only formaldehyde free wet strength resins.
High Efficiency and Zeta-Potential
Zeta-Potential allows for the retention of negatively charged particles smaller than the rated pore size of the filter media over a wide pH range.
The matrix of fibers and filter aids can be manipulated so as to improve the retention qualities of the filter sheet, thereby prolonging membrane life when media selection is optimized. This, in combination with the positive charge inherent in ErtelAlsop's Micro-MediaŽ, provides excellent particle retention efficiency.
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