Filtration & Ultrafiltration
Urethanes and epoxies are widely employed in filtration and Ultrafiltration manufacturing for sealing, bonding, potting or encapsulating blood, gas, hepa, medical, clean room, wine & beer, pharmaceutical, and food 
processing filters.
In air filtration, pleated paper, spun fiberglass, cotton, or other media composed of fibrous materials, removes solid particulates such as dust, pollen, mold, and bacteria from the air.
Ultrafiltration is a variety of membrane filtration used for purifying liquids, in which hydrostatic pressure forces a liquid against a semi-permeable membrane. Solids of high molecular weight are retained, while water and low molecular weight solutes pass through the membrane. Ultrafiltration works on a much smaller level than filtration and can even take antibodies out of blood.
Since 1980, Hapco has been custom formulating adhesives, sealants, and potting compounds for filter manufacturing companies worldwide. As a preferred supplier to corporations like Millipore, Pall Life Sciences, and Koch Membranes, Hapco takes pride in our ability to provide customers with the highest quality materials and state-of-the-art dispensing equipment. Hapco is continuously developing new processing methods to meet the needs of filter manufacturers around the world.
The Filter-bond™ Series was developed using only FDA recognized compounds specifically for Ultrafiltration applications. This series includes products that do not contain aromatic amines or carcinogenic or mutenogenic materials, systems that can be used to pot moist membrane material in place without foaming, and materials that are easily trimmed when used in pre-pot applications. The Filter-bond Series includes a line of elastomeric and rigid materials to meet a wide variety of filtration applications. All Filter-bond products are compatible with Hapco’s RAPIDFIL™ and MINIFIL™ dispensing machines.
Other Filtration Products
Ultralloy™ - General purpose rigid casting compounds. All speeds.
S-RIM™ – Low viscosity, 1:1 casting resins that gel in under a minute and de-mold in less than 10.
Hapweld™ – Structural adhesives used for bonding similar and dissimilar materials
Haprez™ – Two component epoxy formulations with high service temperatures and excellent chemical resistance.
Equipment
RAPIDFIL™ - LCD / computer controlled, 2 component, dispensing equipment.
MINIFIL™ - Low cost, 2 component, portable, dispensing equipment.