The present disclosure provides a depth filter medium comprising at least one elastomeric nonwoven web strengthened by combination with one or more structural support layers. The resulting material is particularly useful in the field of filtration, wherein particulates captured within the elastomeric nonwoven web can be readily released, such as by applying pressure to the web through backwashing. The elastomeric nonwoven web advantageously can stretch under such pressure and return substantially to its original structure and shape upon the removal of the pressure, rendering the filter available for reuse.

The present disclosure provides a depth filter medium comprising at least one elastomeric nonwoven web strengthened by combination with one or more structural support layers. The resulting material is particularly useful in the field of filtration, wherein particulates captured within the elastomeric nonwoven web can be readily released, such as by applying pressure to the web through backwashing. The elastomeric nonwoven web advantageously can stretch under such pressure and return substantially to its original structure and shape upon the removal of the pressure, rendering the filter available for reuse.

A method of filtering air using a composite filter substrate having a mixture of fiber shapes and sizes layer is disclosed. The method provides improved particle cleaning efficiency.

A laminated polyarylene sulfide heat-resistant filter has a plurality of layers, at least including a first web layer that is a filtering surface, and a second web layer that is a non-filtering surface, the laminated polyarylene sulfide heat-resistant filter being characterized in that the first web layer contains 30 to 70 wt % of polyarylene sulfide fibers having a fineness of 0.5 to 1.2 dtex, and 30 to 70 wt % of polyarylene sulfide fibers having a fineness of 1.3 to 3.0 dtex taking a total of a weight percentages of the first web layer as 100 wt %, wherein the second web layer contains polyarylene sulfide fibers having a fineness of 1.0 to 4.0 dtex.

The present disclosure describes a hydroentangled composite filter media that includes a first layer having a plurality of first staple fibers that are entangled. The plurality of first staple fibers have a denier between 0.01 to 1.0. The hydroentangled composite filter media may include a second layer having a plurality of second staple fibers that are entangled. The plurality of second staple fibers have a denier between 1.0 to 50. The second layer extends along and is entangled with the first layer so as to define a gradient of fiber denier along a thickness direction that extends from the first side to the second side. The hydroentangled composite filter media may include a bonding material that at least partially bonds the first staple fibers of the first layer to the second staple fibers of the second layer to impart stiffness to the hydroentangled composite filter media.

An antibacterial and antiviral degradable mask and a manufacturing method thereof are provided. From outside to inside, the mask sequentially comprises a surface layer (1), a core layer (2), and an inner layer (3) that contacts the face; the surface layer (1) is made of an antibacterial and antiviral cellulose spunlace non-woven fabric; the core layer (2) is made of a polypropylene melt-blown non-woven fabric; the inner layer (3) is made of a polypropylene spunbond non-woven fabric or a degradable natural cotton fabric. The mask can have both antibacterial and antiviral functions; moreover, the material is degradable, and thus, environmental pollution pressure caused by non-degradable petroleum-based fiber materials such as polypropylene can be effectively relieved.

The present invention relates to a non-woven fabric for a non-woven air filtering substrate and an ADL substrate of fibre-based three-dimensional multi-layer structure, comprising at least 4 layers arranged one above another, arranged securely, wherein there is a first, upper layer in contact with the flow to be treated, which comprises fibres of a fineness ranging from 6 to 20 dtex and lengths ranging from 32 to 80 mm, and wherein the remaining layers comprise fibres of a fineness ranging from 0.6 to 10 dtex and lengths ranging from 12 to 64 mm. The present invention also relates to a method for producing the non-woven fabric that is the subject matter of the invention and also to the use thereof for preparing sanitary products or filters.

An infusion system for delivery of therapeutic fluids from a remote source into a patient's body. The system has an infusion assembly, a rotating pivot joint member, a fluid connector assembly, and a sealing assembly retained within the infusion assembly between the housing of the infusion assembly and the rotating pivot joint member. The seal reduces leakage of fluids. The rotating joint may be pivoted to three distinct positions to allow for emplacement on the patient, delivery of the therapeutic fluid to the patient, and protected, sealed closure of the fluid channels to avoid patient fluid backflow.

The invention relates to a filter material comprising a gradient structure nonwoven base layer and a nanofiber top layer, wherein the base layer, forming the media inlet side of the filter material in use, functions as a pre-filtration and dust holding layer.

Filter media, filters and methods for preparing filter media are provided herein. The filter media may include a nonwoven sheet having continuous fibers prepared from first and second dissimilar polymers that are triboelectrically charged. The nonwoven sheet may be prepared by needling and/or hydroentangling the continuous fibers. Needling and/or hydroentangling the continuous fibers triboelectrically charges at least a portion of the continuous fibers of the nonwoven sheet. In addition, needling and/or hydroentangling the fibers increases the loftiness of the nonwoven sheet, thereby reducing its resistance to airflow and increasing its dust holding capacity.