7519results about How to "Improve water absorption" patented technology

A coating composition is disclosed which comprises an aqueous polymeric matrix, a hydrophilic polymer, a colloidal metal oxide and a crosslinker. The coating composition when applied on medical devices is hydrophilic, shows improved lubricity, abrasion resistance and substrate adhesion on metallic or plastic substrates. The coating also shows improved water sheeting thus providing the coated substrates with anti-fog properties. The coating absorbs aqueous dye or stain solutions making the substrate suitable for printing.

A plasma concentrator for producing plasma concentrate from a plasma from which erythrocytes have been substantially removed. The device comprises a concentrating chamber having an inlet port and an concentrate outlet, the concentrating chamber containing hydrogel beads and at least one inert agitator; and a concentrate chamber having an inlet communicating with the concentrator outlet through a filter, and having an plasma concentrate outlet port. A process for producing plasma concentrate from plasma from which erythrocytes have been substantially removed, comprising the steps of a) moving the plasma into a concentrating chamber containing hydrogel beads and an agitator to form a hydrogel bead-plasma mixture; b) causing the agitator to stir the hydrogel bead-plasma mixture, facilitating absorption of water by the beads from the plasma, until a hydrogel bead-plasma concentrate is formed; and c) separating the plasma concentrate from the hydrogel beads by passing the plasma concentrate through a filter. The concentrator can be one or more syringe devices coupled for multiple concentrations.

Gelled biopolymer based foams are disclosed. The gelled foams comprise a cross-linked biopolymer, preferably alginate; optionally, a foaming agent such as hydroxy propyl methyl cellulose; and a plasticizer, preferably glycerin sorbitol, or a mixture thereof, that forms the predominant portion of the gelled foam. The foams are soft and pliable and have high absorbency. They are used as wound dressing materials, controlled release delivery systems, cell culture, barrier media for preventing tissue adherence, and bioabsorbable implants. They also have various personal care applications, especially in oral hygiene, and can be used in food applications.

An absorbent core for use in an absorbent article, including a central fibrous layer having synthetic fibers, and two or more types of superabsorbent material (SAP). The SAP is contained primarily in upper and/or lower layers of the absorbent core. The upper and/or lower layer may be a substantially continuous layer of SAP, or may include a free-form of SAP. The upper and/or lower layers may have a blend of two or more types of SAP, or may have only a virgin, unblended SAP. Each of the types of SAP preferably has a different absorbent property (such as high AUL, or fast absorption rate), so that the resultant absorbent core benefits from having multiple absorbent properties provided by the SAP's. An absorbent article including the absorbent core, and a method of providing an absorbent article including the absorbent core are also described.

The invention relates to a wound dressing, a method of manufacturing a wound dressing, and in particular to a material for use as and in a wound dressing. A wound dressing can comprise a material movable between an initial conformation and an expanded conformation resulting from applying an extensive force to the material, such that removal of the extensive force can cause a contraction of the material toward a center of a wound. In addition, the wound dressing can comprise a retaining mechanism removably coupled to the material and configured to retain the material in the expanded conformation.

The invention discloses spherical attapulgite flower ceramsite. The key points of the technical scheme are that the spherical attapulgite flower ceramsite consists of high-adhesion attapulgite clay powder, attapulgite clay tailing powder, red bentonite powder, sludge, diatomite tailing powder and rice husk powder. The spherical attapulgite flower ceramsite is produced by the following steps of mixing the ingredients, pelleting, roasting, cooling, screening and packaging. The spherical attapulgite flower ceramsite has a rough and porous surface, is light in weight, high in strength and water absorption rate, can be immersed in water throughout the year without cracking and can continuously and slowly release nutrition required by flowers. Moreover, the spherical attapulgite flower ceramsite is produced by comprehensively utilizing the sludge and tailings, so that the resource utilization rate is improved, waste is turned into wealth, and environment is protected. Besides, the cylindrical attapulgite flower ceramsite is applicable to cultivation of various flowers and vegetables.

The present invention provides one kind of water gel containing natural high molecular material and its preparation process. The water gel has cross-linking degree of 70-95 % and water absorption of 500-80000 %, and contains natural high molecular material or its derivative selected from chitin, chitin derivative, chitosan, chitosan derivative, carrageenin, etc. The water gel may have synthetic high molecular material, inorganic filler, cross-linking sensitizer, medicine and other assistant added. It is prepared through radiation cross-linking, with the radiation dosage being 10-40 kGy. The water gel of the present invention has high water absorption, high flexibility, good medicine slow releasing performance, and may be used in wound dressing, etc.

The present invention relates to injectable compositions comprising biocompatible, swellable, hydrophilic, non-toxic and substantially spherical microspheres microspheres and a biocompatible carrier for use in dermal augmentation. The present invention further relates to methods of dermal augmentation, particularly for the treatment of skin contour deficiencies, using the injectable compositions.

A hydrogel polymer obtained by polymerizing a monomer component including acrylic acid (salt) is post-neutralized so that each of polymer particles derived from a polymer produced by neutralizing the hydrogel polymer has an allowable neutralization ratio. The polymer as obtained by neutralizing the hydrogel polymer is reacted with a crosslinking agent reactive to a functional group of the polymer. The allowable neutralization ratio, for example, is a neutralization ratio which is not lower, by not less than 20 mole percent, or more than, at least 55 mole percent, than an average neutralization ratio of a mass of the polymer particles, and the post-neutralization is carried out so that a number of polymer particles having a non-allowable neutralization ratio outside the allowable neutralization range is not more than 10 in 200 polymer particles, thus obtaining a water-absorbent agent having high absorbency under no applied pressure and high pressure wherein the amount of water soluble component is lower compared with the conventional water-absorbent agent and a change in pH of a swollen gel is small.

A multi-layer wound dressing comprising at least two absorbent layers, and materials for forming absorbent layers are provided. The absorbent layers have different absorbencies, with the layer closest to the wound having a lower absorbency than the layer furthest from the wound. The wound dressing typically contains additional non-absorbing layers, such as a backing film and wound-facing film. The dressing provides absorbency of wound exudates while preventing the absorbent material from entering the wound. In specific implementations the dressing is substantially transparent prior to application to a wound, as well as after application to the wound when body fluids have been absorbed.

Embodiments of the invention relate to a curable nucleus pulposus implant having water absorption and swelling capabilities, compositions for producing the curable nucleus pulposus implants, and methods of using the curable nucleus pulposus implants. The curable nucleus pulposus implant can be created from a polymer blend composition comprising a ratio of a curable material and at least one hydrophilic polymer. The resulting polymer blend composition may be used to generate curable nucleus pulposus implants to treat a number of disease and/or disorders, such as herniated discs. The curable nucleus pulposus implants may further contain polyelectrolytes and elastomer compounds, as well as pharmacological and biological agents.

The present invention discloses building waste treating and reusing process, which includes the following steps: classifying building wastes into waste concrete, waste stone material, waste ceramic, waste sintered brick and waste lime-sand brick; crushing separately into coarse grains and eliminating metal, timber and other impurity; milling into 5 mm below regenerated fine aggregate; sorting 0.15 mm below high quality fine aggregate and milling into regenerated fine powder material of 250-600 sq m/kg specific surface area; and preparing mortar, concrete, asphalt concrete and other building material with the regenerated fine aggregate and the regenerated fine powder.

Basic magnesium carbonate comprising a tubular aggregated particle of flaky fine crystals.

The invention relates to pet cat litter and its preparation method, which comprises preparing organic base-material 20- 60%, clay 30-80%, binder 0-10%, water absorber 0-20%, surface adsorption substance0- 5%, crushing organic base-material to 30 screen mesh bulkload, processing clay to powder finer than 200 screen mesh, picking organic base material and clay proportionally to making cat litter base body, mixing and stirring the remaining material to making mixed covering material, placing cat litter base body in high-velocity rotating vibration machine, rotating making hydrosphere seeping to the surface of base body, then adding mixed covering material, vibrating slightly for mixing, then sifting and drying, sifting out powder. The inventive cat litter has good deodorant effect, good conglobation property after using, and waste cat litter can combust in favor of environment protection.

The invention discloses heat-preservation sound-proof low-density foamed concrete. The heat-preservation sound-proof low-density foamed concrete is characterized by being prepared from, by weight, 40-100 parts of cement, 5-40 parts of carbide slags, 5-40 parts of active powder, 1-20 parts of foaming agents, 0.1-8 parts of foam stabilizers, 0-8 parts of water reducing agents, 0-8 parts of coagulation accelerator, 0-25 parts of waterproof agents, 0.1-5 parts of anti-cracking agents and 25-150 parts of water, and the foamed concrete is prepared from the materials through mixing, foam molding and maintenance. The heat-preservation sound-proof low-density foamed concrete has the advantages of being low in dry density, low in heat conductivity coefficient, high in strength, wide in raw material source, low in cost, simple in preparation technology, convenient to prefabricate in factories or pour on site and the like; the heat-preservation sound-proof low-density foamed concrete is suitable for building exterior wall heat-preservation engineering, roof heat-preservation engineering, floor heating heat-preservation engineering, composite heat-preservation wall engineering, backfilling engineering, retaining wall slab engineering and the like.

A composition and method of controlling a fire are disclosed. The composition contains a superabsorbent polymer, a colorant, an opacifying agent, and water. The method includes a step of applying the composition to a combustible object, either before or after initiation of combustion. The composition and method are especially useful for application to vegetation or foliage to prevent, retard, suppress, and/or extinguish forest fires and wildfires.

Foams with low water absorption are provided, along with thermoplastic elastomeric foam materials and methods of forming the same. In some embodiments, the TPE foams have a low water absorption. Microcellular foams are included. Processing conditions (e.g., blowing agent type and content, die geometry, exit melt temperature, among others) may be controlled to produce foams having desirable characteristics, such as low water absorption.

A sock includes an air escape route that allows humid air to be expelled to the outside of a shoe. The sock may include a first rib area provided in a ground-touching area of a sole portion of the sock, the ribs being formed in a desired direction. A second rib area, in which ribs are formed in a wale direction, may also be provided in an instep portion of the sock. The ribs of the first and second rib areas may be knitted with alternating knitted pile and knitted mesh fabric. Humid air collecting in areas that do not touch the ground passes through the concave portions of the ribs of the first rib area, and is impelled toward the instep side. Air flowing to the instep side of the sock via the first rib area is expelled to the outside of the shoe via the second rib area.

An object of the present invention is to provide a water absorbent having excellent gel properties and showing excellent properties when used in a water-absorbing material of a sanitary/hygienic material such as paper diaper. Moreover, another object of the present invention is to provide a water absorbent which is safe and excellent in liquid permeability, and in which an amount of liquid permeability improver for improving the liquid permeability is reduced. The water absorbent is made from a water-absorbing resin prepared by a specific polymerization method and having a high degree of cross-linking, a high liquid holding property and a high gel strength (its swelling pressure of gel layer of is 35 kdyne/cm2 or more). This water absorbent is further processed to have a particular particle size distribution (95 wt % or more of its particles are less than 850ƒÊm but not less than 106ƒÊm, and logarithmic standard deviation (ƒĐƒÄ) is in a range of 0.25 to 0.45) and then surface cross-linked. After that, a liquid permeability improver is added therein.

The invention discloses a water-conservation fertilizer pertaining to agricultural fertilizer preparation technical field and containing various cations with a plurality of nutrition functions. The preparation method of the water-conservation fertilizer is that: acrylic acid monomers are partially neutralized by potassium hydroxide solution and next the pH value thereof is adjusted between 4 and 9 with ammonia; then acrylamide, cationic compound, cross-linking agent and initiator are added to the solution in sequence; and the mixture is stirred continuously and reacts quickly under the protection of nitrogen; at last super absorbent polymer is obtained; the super absorbent polymer of 90-99wt percent (dry weight) is mixed with sequestering agent of 1 -10wt percent (dry weight) to obtain the fertilizer. The water-conservation fertilizer has the functions of salt resistance, draught resistance, water saving and conserving, providing nutrition, delaying water releasing, promoting rooting and improving soil structure, and is widely applied in shelterbelt forest development, desert prevention and cure, highway slope protection, lawn construction, soil improvement, gardening and agricultural and forestry industries, etc.

The invention relates to an epoxy resin composition as well as a prepreg and a laminated board made of the same. The epoxy resin composition comprises the following components in parts by weight: 1-50 parts of modified polyphenylene oxide resin, 30-80 parts of epoxy resin, 20-60 parts of active ester curing agent, 0-50 parts of filler and 1-20 parts of assistant. The prepreg made of the epoxy resin composition comprises a base material and the epoxy resin composition which is attached to the base material through soaking and drying. The laminated board made of the epoxy resin composition comprises a plurality of laminated prepregs, wherein each prepreg comprises a base material and the epoxy resin composition which is attached to the base material through soaking and drying. The invention has the advantages of high heat resistance, high fire retardancy, low dielectric constant, low dielectric loss, excellent high-frequency dielectric properties and the like, and is suitable to be used as a high frequency circuit substrate material.

The invention relates to a method for preparing a nano-cellulose antibacterial composite material through on-line culture. The method comprises the following steps of: (1) inoculating an activated bacterial cellulose producing strain into a liquid culture medium, performing amplification culture, transferring the liquid culture medium into a bioreactor, culturing, adding an antibacterial material into the liquid culture medium, and continuing to culture to obtain an unpurified antibacterial bacterial cellulose composite material; and (2) peeling a bacterial cellulose membrane from a framework or directly soaking the composite material in a NaOH solution, treating in water bath, and washing until an obtained product is neutral to obtain the nano-cellulose antibacterial composite material. The preparation efficiency is high, and the method is simple, convenient, feasible and low in cost; and the surface of the bacterial cellulose composite material has a nanoscale three-dimensional fibrous mesh-shaped structure, the tensile strength of the material is greatly improved compared with that of a pure bacterial cellulose membrane, and the material can be widely applied to products such as facial masks, wound dressings, plasters, artificial skins and the like.