386 results about "Superabsorbent polymer" patented technology

A method of creating a wetland in a hot, arid, location includes identifying or establishing a channel of flowing water at the arid location, and installing therein a mat containing seeds, and / or seedlings, and a super absorbent polymer (SAP). Water from the channel is applied to hydrate the SAP, and both edible and dam-constructing vegetation is allowed to grow and mature from the seeds and / or seedlings. Beavers are then introduced into the arid location, which eat the edible vegetation and use the dam-constructing vegetation to construct at least one dam across the channel of flowing water, thereby forming a wetland that further encourages both the vegetation and the beavers to propagate. A perforated, transparent or translucent cover sheet can be placed on or suspended above the mat. A water barrier can be placed below the mat. The wetland vegetation cools and humidifies the environment by transpiration of water.

A method of creating a wetland in a remote arid location includes identifying or establishing a channel of flowing water at the arid location, and installing therein a mat containing seeds, and / or seedlings, and a super absorbent polymer (SAP). Water is applied to the SAP, such that both edible and dam-constructing vegetation grows and matures from the mat. Beavers are then dropped into the arid location by parachute in containers that open upon landing. The beavers eat the edible vegetation and use the dam-constructing vegetation to construct at least one dam across the channel of flowing water, thereby forming a wetland that further encourages both the vegetation and the beavers to propagate. A perforated, transparent or translucent cover sheet can be placed on or suspended above the mat. A water barrier can be placed below the mat. The wetland vegetation cools and humidifies the environment by transpiration of water.

The present disclosure relates to a preparation method of a super absorbent polymer composition. More specifically, it relates to a preparation method of a super absorbent polymer composition capable of pulverizing the hydrogel polymer to a normal particle size without agglomeration between particles by adding an additive having a specific structure, and significantly reducing the amount of fine powder generated during the process.

A method of creating a wetland in a hot, arid, location includes identifying or establishing a channel of flowing water at the arid location, and installing therein a mat containing seeds, and / or seedlings, and a super absorbent polymer (SAP). Water from the channel is applied to hydrate the SAP, and both edible and dam-constructing vegetation is allowed to grow and mature from the seeds and / or seedlings. Beavers are then introduced into the arid location, which eat the edible vegetation and use the dam-constructing vegetation to construct at least one dam across the channel of flowing water, thereby forming a wetland that further encourages both the vegetation and the beavers to propagate. A perforated, transparent or translucent cover sheet can be placed on or suspended above the mat. A water barrier can be placed below the mat. The wetland vegetation cools and humidifies the environment by transpiration of water.

The present invention relates to a bio-based and biodegradable superabsorbent polymer (SAP) comprising sodium alginate, modified cellulose, at least one activation agent, and at least one crosslinking agent. The SAP exhibits a high bio-based content of up to 93% and fulfills industrial composting standards such as EN 13432. The crosslinking reactions are performed under mild conditions, including ambient temperatures and neutral to alkaline pH, eliminating the need for high thermal energy. The resulting SAP granules demonstrate excellent liquid absorption performance, rapid swelling, high retention, and no observed toxicity or skin sensitization. The invention provides a sustainable alternative to petroleum-based SAPs for use in hygiene products, agriculture, and other disposable applications.

An absorbent article including a non-woven substrate of one or more layers of meltblown fibers and a first layer of spunbond fibers and a second layer of spunbond fibers. The absorbent article further includes an absorbent core comprising at least one of fibers or a superabsorbent polymer. At least one of the non-woven substrate or the absorbent may be treated with an alcohol repellency (“AR”) treatment.

This invention relates to the field of cement materials technology, specifically to an anti-carbonation early-strength agent for hypersulfate cement and its preparation method. The anti-carbonation early-strength agent comprises: a modified core formed by a water-soluble silicate and a water-storing superabsorbent polymer; an aluminum- and calcium-containing layered bimetallic hydroxide intermediate layer coating the outer surface of the core; and a silicon and / or aluminum active nanomaterial shell layer coating the outer surface of the intermediate layer, thereby forming a Si / Al@Ca / Al-LDHs@modified core dual-core-shell structure. The anti-carbonation early-strength agent of this invention effectively solves the problems of long setting and hardening time, low early strength, and easy carbonation inherent in traditional hypersulfate cement.

An absorbent core for use in an absorbent article including a high loft central layer having deposited on two different surfaces thereon a first superabsorbent polymer SAP1 and a second superabsorbent polymer SAP2 in the form of particles that are at least partially distributed within the high loft layer. The SAP1 has a higher capacity than SAP2 and the permeability of SAP2 is more than 5×10-7 cm3·s / g.

Embodiments of the present disclosure are directed to a coated substrate comprising a water swellable coating applied to the substrate. Based on the total weight of the water-swellable coating, the water-swellable coating comprises 30% to 90% by weight of a plastisol binder and 10% to 70% by weight of a superabsorbent polymer. The plastisol binder comprises from 1 wt% to 50 wt% of a water soluble polymer and from 50 wt% to 99 wt% of a plasticizer, based on the total weight of the plastisol binder.

Admixtures for concrete, concrete including admixtures, and methods of making admixtures for concrete and making concrete using the admixtures. Such an admixture includes a dry mixture of a silica-based binder and recycled waste material, the latter including at least one of post-consumer waste and / or post-manufacturing waste containing superabsorbent polymer particles and cellulosic particles. The admixture typically is provided in a dry powder form. The recycled waste material may be absorbent hygiene products, such as disposable diapers and / or feminine hygiene products.

The invention discloses a plugging particle, a preparation method, application and a grouting material, the plugging particle is of a core-shell structure and comprises a force-bearing inner core, the force-bearing inner core is coated with an expansion functional layer, and the expansion functional layer is coated with a delayed hydrogel outer film layer; wherein the inner core is made of one or more of quartz sand, kaolin and inorganic fibers; the expansion functional layer comprises modified bentonite and a super absorbent polymer; the delayed hydrogel outer film layer comprises a water-soluble film; the particle size of the blocking particles is 0.5 to 2.5 mm; through material structure optimization and response mechanism design of the functional plugging particles and the special grouting liquid, the automatic plugging function in the grouting process without mechanical triggering, a chemical expanding agent and a complex plugging device is achieved; and the method is suitable for scenes with high requirements on plugging precision, construction efficiency and structural stability in complex rock mass crack grouting engineering.

The utility model relates to the technical field of hygienic products, in particular to a leakage-proof hygienic product which comprises a skin-friendly surface layer, a flow guide layer, an absorption layer and a liquid-tight bottom film which are sequentially arranged from top to bottom in the thickness direction. The diversion layer and the absorption layer are positioned in a suspension structure formed by the skin-friendly surface layer and the liquid-tight bottom membrane; the absorption layer is single-layer or multi-layer super absorbent resin absorbent paper and comprises a plurality of absorption areas with the super absorbent resin content gradually increased in a gradient mode from the center to the edge; the hygienic product is provided with a flow guide groove structure penetrating through the skin-friendly surface layer, the flow guide layer and the absorption layer, and the flow guide groove structure is arranged in the center area of the hygienic product and does not extend to the edge of the hygienic product. The flow guide groove structure comprises a first flow guide groove located in the central area of the hygienic product and distributed in the length direction and a plurality of second flow guide grooves communicated with the first flow guide groove. And the plurality of second diversion trenches are symmetrically distributed along the first diversion trench. The hygienic product provided by the utility model can effectively prevent side leakage and rear leakage.

The invention provides a safe and environment-friendly coal-based waste modified hole sealing material, the modified hole sealing material comprises a dry material mixture and water, the dry material mixture comprises the following components by weight: 68-88 parts of coal-based waste; 3 to 5 parts of hydrogel; 2 parts of a bionic binder; 1-5 parts of a modifier; the coal-based wastes comprise coal gangue powder, pulverized coal and fly ash in a weight part ratio of (5-6): 1: 4; the hydrogel is prepared from cellulose ether, high-molecular water-absorbent resin, glyoxal and sodium polyhydroxycarboxylate; the bionic adhesive is prepared from at least one of 3, 4-dihydroxy phenylalanine, N-(N-L-gamma-glutamyl-L-cysteinyl) glycine, acrylic acid and ammonium persulfate. The modified hole sealing material has the advantages of environmental protection, low cost, efficient hole sealing and the like. The invention also discloses a preparation method of the material. The preparation method is simple and feasible.

A superabsorbent polymers and a method of forming the same are provided. The method is processed by adding calcined shell powders to a free radical polymerization. The superabsorbent polymers with more micropores can be obtained. Therefore, absorptivity and permeability for the liquid of the superabsorbent polymers are increased, and diffusibility and liquid conductivity of the superabsorbent polymers are also improved.

A method of modifying weather by seeding storm clouds at various altitudes with a polymer. The storm clouds are seeded by dispersing a superabsorbent polymer into the cloud in sufficient quantities to cause a large absorption of water. The reaction of the water with the polymer creates a gel-like substance that precipitates to the surface, thus causing an internal constriction within the cloud to lessen storm velocities. The polymer is placed in drop bags and dispensed from an airplane at predetermined altitudes.

The present invention relates to a method of preparing a superabsorbent polymer. More particularly, the preparation method performs a polymerization reaction of a monomer in the presence of an aqueous dispersion of hydrophobic particles, thus enabling the preparation of a superabsorbent polymer having a high surface tension and an improved absorption rate without deterioration in absorption properties.

To provide an absorbent article in which it is easy to recognize that the absorbent article is a product suitable for wearing for a long time and which can be used by a user without anxiety.SOLUTION: An absorbent article (1) includes an absorbent core (11) in which an average basis weight of a superabsorbent polymer is equal to or greater than 270 g / m2. The absorbent article includes a first colored region (51) and a second colored region (52) in a case where the diaper (1) in a developed and stretched state is viewed from a non-skin side in a thickness direction, a total area of the first colored region (51) being equal to or greater than 50% of an area of the absorbent article (1). When 2071U, 2072U, 2073U, etc. in a color sample of PANTONE are represented as first color group, the first colored region (51) is a region of a color corresponding to any of the first color group, When 100U, 101U, 102U, etc. in the color sample of PANTONE are represented as a second color group, the second colored region (52) is a region of a color corresponding to any of the second color group.SELECTED DRAWING: Figure 1

The process for producing and using polymeric Hydrocells for production of atmospheric water using a superabsorbent polymer derived from alkaline hydrolysis of the polyacrylonitrile (PAN). The Hydrocell adsorbs up to 80% of its weight in atmospheric water under ambient conditions and releases this water when heated to less than 100° C. using renewable energy sources, such as solar energy. This low-temperature operation allows for repeated adsorption and desorption cycles lasting years without degradation. Multiple Hydrocells can be arranged into Hydrobatteries with a surface area greater than 2 m2, capable of adsorbing several kg of water per day. The Hydrocells offer a sustainable and safe solution for producing potable water free of toxic chemicals and pathogenic microorganisms in regions with limited water resources. By drawing water from the vast atmospheric reservoir containing over 13,000 km3, this can help prevent deaths caused by the consumption of contaminated water.

A polyacrylic acid (salt)-based super absorbent polymer has a T2 relaxation time of 1.85×10−5 seconds or less, as derived by exponential fitting of the TD-NMR measurement results of the super absorbent polymer through regression analysis using the following Equation 1:y=y⁢0+A×e-(xt)wherein, y represents a signal intensity obtained through TD-NMR analysis, x represents an echo time determined from specified experimental parameters: first duration; last duration; and a data point, t represents a T2 relaxation time derived by exponential fitting, A represents a signal intensity value derived by exponential fitting, and y0 represents an offset constant derived through regression analysis.

The present disclosure relates to a superabsorbent polymer and a method for preparing the same. More particularly, the present disclosure relates to a superabsorbent polymer having a particle aspect ratio higher than a certain level and a large roughness, thereby exhibiting an improved absorption rate, and to a method for preparing the superabsorbent polymer.

The invention relates to absorbent paper as well as a preparation method and application thereof. The method comprises the following steps: pulping plant fiber pulp, adding sodium bicarbonate for pretreatment, and washing to obtain pretreated paper pulp; adding a dispersing agent, a wet strength agent and a composite antibacterial component into the pretreated paper pulp, and uniformly mixing to obtain mixed paper pulp; the composite antibacterial component is prepared from chitosan, polylysine and a modified copper oxide dispersion liquid; feeding the mixed paper pulp into a rotary screen paper machine to produce upper-layer single-layer wrinkling base paper, then compounding the upper-layer single-layer wrinkling base paper with lower-layer single-layer semi-forming base paper on which the macromolecular water-absorbent resin particles are scattered, and then drying to obtain the water-absorbent paper. The antibacterial rate of the absorbent paper on various pathogenic bacteria is larger than or equal to 99.5%, the antibacterial rate is still larger than or equal to 97% after 20 times of water washing, and the absorbent paper is high in water absorption speed, stable in physical performance, safe, environmentally friendly, controllable in cost, capable of being widely applied to the fields of hygienic products, medical dressings, food packaging and the like, simple in preparation process and suitable for industrial production.

The invention relates to the field of preparation of polymer absorbent materials, in particular to a preparation method of a chitosan-based super absorbent material with an antibacterial function, the prepared super absorbent material comprises three layers, the upper surface and the lower surface are plant fiber highly breathable layers, and the middle is chitosan-based super absorbent microspheres with the antibacterial function; the plant fiber high-permeability layer is obtained by electrostatic spinning of kapok fiber, bamboo fiber, modified montmorillonite and polyvinyl alcohol, the super absorbent microspheres are gel materials obtained by polycondensation crosslinking of chitosan and acrylic acid and composite crosslinking of alginic acid, and the prepared super absorbent microspheres are high in deformation resistance and uniform and smooth in surface. The water absorption capacity of the super absorbent material is 410 g / g or above, the simulated blood absorption capacity is 35 g / g or above, and the super absorbent material has the advantages of being good in air permeability, high in water absorption and good in antibacterial activity.

This disclosure relates to a superabsorbent polymer and a method for preparing the same. More specifically, this disclosure relates to a superabsorbent polymer having reduced extractable content without degrading absorption performance, and a method for preparing the superabsorbent polymer by polymerization in the presence of a foaming agent and a carboxylic acid additive with a specific structure.

An absorbent article includes a front waist edge, a rear waist edge longitudinally opposing the front waist edge, and a longitudinal axis extending from a midpoint of the front waist edge to a midpoint of the rear waist edge. The absorbent article comprises a liquid permeable topsheet, a liquid impermeable backsheet, and an absorbent core disposed at least partially intermediate the topsheet and the backsheet. The absorbent core comprises a first continuous channel and a second continuous channel, each substantially free of the superabsorbent polymers and at least partially oriented in the longitudinal direction of the absorbent. The first and second channels each have lateral widths parallel to the lateral axis. A profile of the lateral widths of each channel over a longitudinal length of at least 50 mm of the channel taken along the longitudinal axis is substantially constant. The average lateral width of the first channel differs from an average lateral width of the second channel.

The present invention relates to a biodegradable superabsorbent polymer and its preparation method, belonging to the technical field of polymer materials. First, polyol I and terpene acid undergo a ring-opening polymerization reaction to generate an oligomer with carboxyl side chains. Then, the oligomer with carboxyl side chains and polyol II undergo a polycondensation cross-linking reaction to obtain a degradable cross-linked polymer. Finally, the degradable cross-linked polymer reacts with sodium salt to prepare the biodegradable superabsorbent polymer. Polyol I is ethylene glycol, propylene glycol, butylene glycol, hexanediol, octanediol, isosorbide, isomannide, isoidide, IIDML, IMDML, ISDML, 1,4-cyclohexanedimethanol or furan dimethanol. Polyol II is glycerol, triethanolamine, 1,2,4-butanetriol, pentaerythritol or erythritol. The chemical structural formula of the product is or, and the number-average molecular weight is 10000-80000 g / mol. The method of the present invention has a simple process; the product has both superabsorbent ability and excellent biodegradability.

Provided is a method for producing recycled fibers from a mixture of a superabsorbent polymer and pulp fibers, the method making it possible to achieve both treatment speed and energy efficiency in ozone treatment. This method for producing recycled fibers from a mixture of a superabsorbent polymer and pulp fibers comprises a first treatment step (S6) and a second treatment step (S9). The first treatment step includes removing at least part of the superabsorbent polymer by treating the mixture of the superabsorbent polymer and the pulp fibers with ozone in a first treatment liquid (52-1) within a first treatment tank (31-1) while supplying ozone to the first treatment liquid. The second treatment step includes treating the pulp fibers with ozone in a second treatment liquid (52-2) within a second treatment tank (31-2) while supplying ozone released from the first treatment liquid within the first treatment tank to the second treatment liquid.

A water-swellable semiconducting material is provided, comprising a semiconducting layer and a semiconducting water-swellable polymer layer on which the semiconducting layer is arranged. The semiconducting water-swellable polymer layer consists of conductive particles dispersed in a crosslinked superabsorbent polymer matrix. This material can be formed into tapes or other structures for insulating and protecting cables. The water-swellable semiconducting material can be applied to cables or other conductive materials to insulate them and protect the cables from water ingress.

Provided is an absorbent article (1) having a liquid-absorbing absorbent body (11) and a skin-side sheet (12) that is positioned closer to the skin side than the absorbent body (11), wherein: the absorbent body (11) is provided with a highly absorbent polymer having a basis weight of 270 g / m2 or greater; the skin-side sheet (12) is provided with an antibacterial agent (R); an adhesive (12x) is provided between the absorbent body (11) and the skin-side sheet (12); in a plan view of the absorbent article (1) in an expanded state and a stretched state, in a region overlapping the absorbent body (11), the absorbent article (1) has adhesive sections (18), which are regions in which the adhesive (12x) is present, and non-adhesive sections (19), which are regions in which the adhesive (12x) is not present; and the absorbent article (1) has portions where the antibacterial agent (R) and an adhesive section (18) overlap, and portions where the antibacterial agent (R) and a non-adhesive section (19) overlap.

The present invention relates to the use of at least one cross-linked polymer based on chitosan for soil fertilization, a fertilizing composition comprising said polymer as a superabsorbent polymer, a method for preparing the fertilizing composition, the use of the fertilizing composition for improving plant growth, and a method for fertilizing soils using such a fertilizing composition.

The present disclosure relates to a super absorbent polymer exhibiting an improved absorption rate and improved absorption performance.