2863 results about "Absorbent material" patented technology

A process is provided for making a soft, high density, absorbent material with improved characteristics. A web is formed from material that includes a mixture of cellulosic fibers and synthetic polymer fibers. Then, the web is preferably compacted and embossed at an elevated temperature to further increase the web density and preferably to also create liquid-stable bonds between the synthetic polymer fibers and the cellulosic fibers in spaced-apart regions of the web.

A method of forming semiconductor junctions in a semiconductor material of a workpiece includes ion implanting dopant impurities in selected regions of the semiconductor material, introducing an optical absorber material precursor gas into a chamber containing the workpiece, generating an RF oscillating toroidal plasma current in a reentrant path that includes a process zone overlying the workpiece by applying RF source power, so as to deposit a layer of an optical absorber material on the workpiece, and optically annealing the workpiece so as to activate dopant impurities in the semiconductor material.

A method of processing a workpiece includes introducing an optical absorber material precursor gas into a chamber containing the workpiece, generating an RF oscillating toroidal plasma current in a reentrant path that includes a process zone overlying the workpiece by applying RF source power, so as to deposit a layer of an optical absorber material on the workpiece, and exposing the workpiece to optical radiation that is at least partially absorbed in the optical absorber layer.

An absorbent article comprising a central absorbent member and a lateral wicking barrier for inhibition of wicking from the central regions of the article to an outlying outer absorbent member. The wicking barrier has a vertical component for prevention of radial wicking in the plane of the article and thus promotes center filling of the article with fluid and reduces the likelihood of leaks from the sides of the article. The wicking barrier can also have a horizontal component to prevent leakage, redirect fluid flow, and improve fit and performance of the article. In one embodiment, the central absorbent member is a concentric absorbent structure having alternating rings of barrier material and absorbent material, including a spiral wound composite formed from a layer of barrier material wound with a layer of absorbent material and then sliced to provide a thin absorbent layer having high permeability in the thickness direction but low permeability in the plane due to the barrier material.

An absorbent article having an absorbent core comprising a core wrap (16, 16′) enclosing an absorbent material (60), which comprises at least 80% of superabsorbent polymers (“SAP”) by weight. The absorbent core further comprises at least one channel (26, 26′) and an acquisition-distribution system (ADS) between the topsheet and the absorbent core, the ADS comprising one, two or more layers wherein the ADS does not comprise a layer comprising at least 50% by weight of synthetic fibers and having a basis weight above 150 gsm.

An absorbent article comprising a central absorbent member and a lateral wicking barrier for inhibition of wicking from the central regions of the article to an outlying outer absorbent member. The wicking barrier has a vertical component for prevention of radial wicking in the plane of the article and thus promotes center filling of the article with fluid and reduces the likelihood of leaks from the sides of the article. The wicking barrier can also have a horizontal component to prevent leakage, redirect fluid flow, and improve fit and performance of the article. In one embodiment, the central absorbent member is a concentric absorbent structure having alternating rings of barrier material and absorbent material, including a spiral wound composite formed from a layer of barrier material wound with a layer of absorbent material and then sliced.

The present disclosure, in part, relates generally to an absorbent article to be worn about the lower torso. The absorbent article comprises a chassis comprising a topsheet, a backsheet, an absorbent core disposed between the topsheet and the backsheet, and a pair of longitudinal barrier cuffs attached to the chassis. Each of the longitudinal barrier cuffs is formed of a web of material. The web of material comprises a first nonwoven component layer comprising fibers having an average diameter in the range of about 8 microns to about 30 microns, a second nonwoven component layer comprising fibers having an average diameter of less than about 1 micron, and a third nonwoven component layer comprising fibers having an average diameter in the range of about 8 microns to about 30 microns. The second nonwoven component layer is disposed intermediate the first nonwoven component layer and the third nonwoven component layer.

The present invention relates to methods and compositions for carrier fluids comprising water-absorbent fibers. One embodiment of the present invention provides a method of treating a portion of a subterranean formation, comprising providing a slurry wherein the slurry comprises a servicing fluid, particulates, and a degradable, water-absorbent material wherein the degradable, water-absorbent material acts to help keep the particulates from settling out of the slurry; and, introducing the slurry into the portion of the subterranean formation. Another embodiment of the present invention provides a slurry suitable for use in subterranean operations comprising a servicing fluid, particulates, and a degradable, water-absorbent material wherein the degradable, water-absorbent material acts to help keep the particulates from settling out of the slurry.

An absorbent article comprising a pair of leg cuffs (32) with an raised section (34) and an absorbent core (28) comprising at least one channel (26, 26′) at least partially oriented in the longitudinal direction (80) of the article. The article has crotch width (Wd) before use as measured between the proximal edges of the leg cuffs at the level of the crotch point of from to 70 mm to 200 mm, and a Relative Crotch Width Reduction (RCWR) of at least 30 mm / kg.

A medical device has a structure made of a first biodegradable and / or bioabsorbable material and a second biodegradable and / or bioabsorbable material. The first biodegradable and / or bioabsorbable material has a degradation rate that is faster than a degradation rate of the second biodegradable and / or bioabsorbable material. And, the structure experiences a period of accelerated degradation upon exposure of the first biodegradable and / or bioabsorbable material.

Apparatus and method for producing absorbent structures with absorbent layers with channel(s) without absorbent material, using a first moving endless surface with specific raised strip(s) and a second moving endless surface with specific mating strip(s).

The present invention relates to a detachable pump and a negative pressure wound therapy (NPWT) system using the same. The detachable pump comprises: a top module, including a motor set and a top elastic member; and a bottom module, arranged beneath the top module in a manner that it is connected to the top module by a detachable connection mechanism and comprised of: a base configured with an inlet and an outlet; at least an one-way suction valve; at least an one-way drain valve; a diaphragm element; and a bottom elastic member. With the aforesaid system, spent liquid can be prevented from flowing back to a wound section or the base by the cooperation of the suction valve and the drain valve as the top elastic member is configured to be pushed by the motor set for enabling the resulting resilience of the top elastic member to counter with the resilience of the bottom elastic member in a manner that the diaphragm element is propelled for enabling the detachable pump to generate a vacuuming force. By incorporating the aforesaid detachable pump into a NPWT system along with dressings and absorbent materials, spent liquid of a wound is drawn by the pump to be absorbed directly by the absorbent materials by way of the dressings so that not only the piping length and the volume of the NPWT system are reduced, but also the power requirement of the pump is decreased.

A high strength abrasion resistant surgical suture material with improved tie down characteristics is color coded for visualization and identification purposes. The suture features a multifilament cover formed of strands of ultra high molecular weight long chain polyethylene braided with polyester, nylon or a bioabsorbable material. Selected nylon fibers in the cover are provided in a color contrasting with the other cover fibers to provide an identifiable trace. The cover surrounds a core formed of twisted strands of ultrahigh molecular weight polyethylene. The suture, provided in a #2 size, has the strength of #5 Ethibond, is ideally suited for most orthopedic procedures, and can be attached to a suture anchor or a curved needle.

Composite particles and methods for making the same. An absorbent material is formed into a particle. An optional performance-enhancing active is coupled to the absorbent material before, during, or after the particle-forming process, homogeneously and / or in layers. Additionally, the composite absorbent particle may include a core material. Preferred methods for creating the absorbent particles include a pan agglomeration process, a high shear agglomeration process, a low shear agglomeration process, a high pressure agglomeration process, a low pressure agglomeration process, a rotary drum agglomeration process, a mix muller process, a roll press compaction process, a pin mixer process, a batch tumble blending mixer process, an extrusion process, and a fluid bed process.

An absorbent article that can be a sanitary napkin. The absorbent article comprises a topsheet joined to a backsheet and has an absorbent core material disposed therebetween, the absorbent core material being a fibrous absorbent material exhibiting on one side thereof discrete raised portions. The raised portions define a continuous network of channels, the channels defining a void region adjacent the topsheet of the sanitary napkin.

This invention is directed to super-absorbent material, which comprises a super absorbent polymer core that is coated with an organic, polar coating agent, and whereby the particulate super-absorbent material has a contact angle and a corresponding cos CAm (as defined herein), whereby the cos CAm is more than 0.3, and whereby, when said coating agent is in the form of particles, said coating agent particles have a (weight) mean particle size of from 0.001 to 1 micron. The material is useful for absorbent structures and absorbent articles (comprising such structures). The coated super-absorbent material is typically present in said absorbent structure at least at a concentration of 50% by weight of the structure, preferably even 80% or even 90%. The invention also provides a process for making the absorbent material.

A stent having an elongate tubular configuration is formed of a plurality of elongate elements interwoven or braided to form a tubular configuration. The elements may be relatively strong and rigid, but movable relative to each other within the weave or braid in order to provide the stent with generally soft characteristics. The elements may be formed of different materials, such as an absorbent material permitting the stent to be doped with materials such as drugs and chemicals. Even the absorbency can be controlled and varied to provide a predetermined time-release of the absorbent.

A hybrid medical implant having a biocompatible, nonabsorbable core portion and a bioabsorbable textured outer surface portion overlying the core portion. The hybrid implant is useful as a prosthesis for tissue augmentation and / or reconstruction. The core portion of the implant includes a body formed from a nonabsorbable, biocompatible implantable material such as silicone or urethane elastomer. The core portion may be either a solid body, a viscous gel body or a fluid-filled shell. The textured outer surface portion envelops the core portion and presents an irregular, bioabsorbable textured surface to the exterior environment. As a capsule forms around the implant following implantation, the irregular contour of the outer surface of the implant disorients structural proteins in the capsule to impede spherical contraction thereof. Either during the formation of the capsule and / or after the capsule is formed, the outer bioabsorbable surface portion of the implant is absorbed by the body of the host. After bioabsorbtion of the bioabsorbable outer surface portion, the remaining core portion of the implant remains enveloped by the capsule but unattached to capsular tissue. The outer bioabsorbable portion of the hybrid implant may include more than one biocompatible, bioabsorbable material.

The present invention relates to microfluidic laminar flow detection strip devices and methods for using and making the same. The disclosed devices comprise: a first inlet; a microfluidic channel having a first end and a second end, wherein the first end is fluidly connected to the first inlet; a bellows pump fluidly connected to the second end of the microfluidic channel, wherein the bellows pump comprises an absorbent material disposed therein; a dried reagent zone within the microfluidic channel, wherein the dried reagent zone comprises a first reagent and a control reagent printed thereon, the first reagent comprising a first detection antibody conjugated to a dyed substrate bead or functionalized for colorimetric development, and the control reagent comprising a control detection antibody conjugated to a dyed substrate bead or functionalized for calorimetric development; a first bound antibody zone within the microfluidic channel, wherein the first bound antibody zone comprises a first bound antibody printed thereon; and a control zone within the microfluidic channel, wherein the control zone comprises a control bound antibody printed thereon.

A disposable diaper has a chassis and a body fluid absorbent structure. The body fluid absorbent structure comprises a panel of body fluid absorbent material and a liquid-pervious sheet covering a surface of the panel facing the wearer's skin. The diaper is provided with a plurality of crossover members extending across the body fluid absorbent structure and facing the liquid-pervious sheet. The crossover member has its transversely opposite end portions bonded to the diaper in the vicinity of the side edge portions of the body fluid absorbent structure and its intermediate portion defined between the side end portions not bonded to the liquid-pervious sheet.

Described is an absorbent article comprising a liquid-permeable layer (18) disposed towards the wearer's body when the said article is in use; a liquid-impermeable layer (20) disposed away from the wearer's body when the said article is in use; as well as an absorbent body arranged between the liquid-permeable layer (18) and the liquid-impermeable layer (20). The absorbent body comprises an absorbent material (32) which remains able to flow even after contact with a liquid. In addition, the invention discloses an absorbent article which comprises a liquid-impermeable layer disposed away from the wearer's body when the article is in use, as well as an absorbent body covered by a liquid-permeable layer; with the said absorbent body containing an absorbent material which remains able to flow even after contact with a liquid. In this, the absorbent body is connected to the liquid-impermeable layer in a central area of the said absorbent body.

An absorbent core (28) and an absorbent article (20) comprising the core. The absorbent core comprises a core wrap (16, 16′) enclosing an absorbent material (60), wherein the absorbent material comprises at least 80% of superabsorbent polymers (“SAP”) by weight of the absorbent material. The absorbent core has a Relative Wet Caliper Increase (RWCI) after compression of less than 10% as measured by the Wet Caliper And Compression Force (WCACF) Test as described herein, and wherein the core wrap (16, 16′) is at least partially sealed so that substantially no absorbent material leaks out of the core wrap while performing the WCACF Test.

An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed having an absorbent core which imparts increased wearing comfort to the article and makes it thin and dry. The absorbent core useful for an absorbent article comprises a substrate layer, a discontinuous layer of absorbent material, and a layer of thermoplastic material. A second surface of the discontinuous layer of absorbent material is in at least partial contact with a first surface of the substrate layer. Portions of a second surface of the layer of thermoplastic material are in direct contact with the first surface of the substrate layer and portions of said second surface of the layer of thermoplastic material are in direct contact with a first surface of the discontinuous layer of absorbent material. A process for providing a storage layer for an absorbent core useful in an absorbent article is further disclosed.

A flexible, multilayer wound dressing with antibacterial and antifungal properties, together with methods for making the dressing. The dressing includes a layer of silver-containing fabric, a layer of absorbent material, and (optionally) a layer of a flexible air-permeable and / or water-impermeable material. The dressing can be used for prophylactic and therapeutic care and treatment of skin infections and surface wounds (including surgical incisions), as a packing material, and as a swab for surface cleaning.