Unitary multi-component filter media

B - Operations – Transporting – 01 – D

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B01D 39/16 (2006.01) B01D 39/20 (2006.01)

Patent

CA 2418385

A high efficiency particulate air (HEPA) filter made from a layer of electrostatically-charged thermoplastic fiber scrim that is point-bonded to a layer of glass fiber batting to form a composite layer defining an area, wherein the point-bonding is distributed over substantially all of the area of the composite layer and the bond points constitute approximately 1 % to approximately 6 % of the total surface area of the welded filter material, and wherein the composite layer is substantially uncompressed. Also, a process for forming the filter by providing an ultrasonic rotary drum having a large number of projections from the surface of the drum, passing a layer of electrostatically-charged thermoplastic fiber scrim resting on top of a layer of glass fiber batting over said drum in such a manner that said projections do not substantially penetrate into the subassembly, and passing the subassembly resting on top of the projections under an ultrasonic horn emitting high frequency sound waves into the subassembly to form point-bonds in the vicinity of the projections.

Cette invention se rapporte à un filtre à haute efficacité contre les particules (HEPA) fait d'une couche de gaze de fibre thermoplastique à charge électrostatique qui est soudée par points à une couche d'un matelas de fibre de verre, afin de former une couche composite définissant une superficie, le soudage par points étant réparti essentiellement sur toute la superficie de la couche composite et les points de soudage constituant environ 1 à environ 6 % de la superficie totale du matériau filtrant ainsi soudé, la couche composite étant en outre essentiellement non comprimée. Cette invention concerne également un procédé servant à former ce filtre en prévoyant un tambour rotatif ultrasonore ayant un grand nombre de projections s'étendant depuis la surface du tambour, en faisant passer sur ce tambour une couche de gaze de fibre thermoplastique à charge électrostatique placée au sommet d'une couche de matelas de fibre de verre, de telle sorte que les projections ne pénètrent essentiellement pas dans le sous-ensemble, et en faisant passer ce sous-ensemble placé au-dessus des projections sous un pavillon ultrasonore émettant des ondes sonores haute fréquence dans le sous-ensemble, en vue de former des soudages par points à proximité desdites projections.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Unitary multi-component filter media does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Unitary multi-component filter media, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unitary multi-component filter media will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1395629

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.