Provided is a filter plug, a well system, and a method for fracturing a well system. The filter plug, in one aspect, includes a filtration skeleton. The filter plug according to this aspect further includes a degradable material in contact with the filtration skeleton, the filtration skeleton and degradable material configured to lodge within a port in a wellbore, and thus substantially plug the port when the degradable material remains intact with the filtration skeleton and allow the filtration skeleton to filter particulate matter as fluid passes there through when the degradable material no longer remains intact with the filtration skeleton.

A fluid control device includes a support structure configured to be deployed in a borehole, and a filtration component disposed at the support structure, the filtration component including a porous medium made from a thermoplastic polymer material, the porous medium including an open cell foam. The porous medium has a porosity selected to cause the porous medium to exhibit shape memory behavior, and the porous medium is configured to be compacted from an initial shape to a compacted shape, deployed in the borehole, and subsequently expanded due to a downhole temperature to conform to a surface of the borehole.

A filter includes a porous molding, the porous molding being a sintered product of mixed powder containing dry gel powder including an ion exchange resin and thermoplastic resin powder, or a swelled body of the sintered product. When water having an electric resistivity value of 18 MΩ.Math.cm or more is allowed to pass through a space velocity of 1200 hr−1, the electric resistivity value of water after passage is 15 MΩ.Math.cm or more.

To provide a filter that can efficiently remove metal ions in a solution to be treated, and easily acquire a solution having an extremely low content of metal ions.

A filter includes a porous molding, the porous molding being a sintered product of mixed powder containing dry gel powder including an ion exchange resin and thermoplastic resin powder, or a swelled body of the sintered product. When water having an electric resistivity value of 18 MΩ.Math.cm or more is allowed to pass through a space velocity of 1200 hr−1, the electric resistivity value of water after passage is 15 MΩ.Math.cm or more. To provide a filter that can efficiently remove metal ions in a solution to be treated, and easily acquire a solution having an extremely low content of metal ions.

An apparatus includes an expandable and porous filtration member having a body constructed of a composite containing a polymer hydrogel, a rubber binder, and a filler. The body has a first volume and expandable to a second volume upon contacting with a fluid comprising water.

Provided is a molded filter used for a flexible disposable bag which is produced so as to be capable of sucking and storing, for example, bodily secretions of a patient and being disposed when a fixed storage amount is reached, wherein a laminate of at least two elements of a powdered hydrophilic swelling agent and a charged nonwoven fabric, and more preferably, a laminate of three elements with a hydrophobic porous film added thereto, is used as a filter base material and the charged nonwoven fabric is arranged downstream of the powdered hydrophilic swelling agent in a direction of flow of expiratory air inside the body. Thus, the molded filter has functions of air permeability that is equal to or higher than a PE sintered body CMC filter, short term and long term waterproof properties, and a better microbial barrier property.

A filter includes a porous molding, the porous molding being a sintered product of mixed powder containing dry gel powder including an ion exchange resin and thermoplastic resin powder, or a swelled body of the sintered product. When water having an electric resistivity value of 18 MΩ.Math.cm or more is allowed to pass through a space velocity of 1200 hr−1, the electric resistivity value of water after passage is 15 MΩ.Math.cm or more. To provide a filter that can efficiently remove metal ions in a solution to be treated, and easily acquire a solution having an extremely low content of metal ions.

This invention is to an anti-virus filter which may included in a facemask, personal protective equipment, respirator or ventilator to protect against airborne pathogens including the novel coronavirus. It is comprised of one or more anti-virus layers comprising a superabsorbent polymer which converts to a hydrogel upon addition of a water solution containing soap or detergent. The anti-virus layer is enclosed between an outer layer and an inner layer both of which are permeable to air but impermeable to water.

A device for extracting water vapour from a fluid stream includes a carrier structure, a substrate of fibrous material provided on the carrier structure, the fibrous material including a plurality of individual fibres, a quantity of an LCST polymer coating the individual fibres; and a heating provision arranged to selectively heat the LCST polymer to above its lower critical temperature whereby water absorbed by the fibres can be subsequently released on heating. By providing the LCST polymer as a coating onto the fibres, an increased surface area may be achieved.

A filter structure (100) for separating water from a fluid, the filter (100) comprising an absorbent filter membrane (2) constituted by a non-woven textile (20), wherein the non-woven textile (20) is constituted by a bearing lattice (21) and by a super-absorbent material (22), which expands when it absorbs water, fixed to the bearing lattice (21), wherein the super-absorbent material (22) is present in a smaller quantity than 70% in dry weight with respect to a dry weight of the non-woven textile (20).