Abstract: Affords a method of storing GaN substrates from which semiconductor devices of favorable properties can be manufactured, the stored substrates, and semiconductor devices and methods of manufacturing the semiconductor devices. In the GaN substrate storing method, a GaN substrate (1) is stored in an atmosphere having an oxygen concentration of 18 vol. % or less, and/or a water-vapor concentration of 12 g/m3 or less. Surface roughness Ra of a first principal face on, and roughness Ra of a second principal face on, the GaN substrate stored by the storing method are brought to no more than 20 nm and to no more than 20 ?m, respectively. In addition, the GaN substrates are rendered such that the principal faces form an off-axis angle with the (0001) plane of from 0.05° to 2° in the <1 100> direction, and from 0° to 1° in the <11 20> direction.

Abstract: There is described zeolites containing releasably adsorbed nitric oxide, methods of preparing the zeolites, methods of releasing the nitric oxide into a solution or into air and uses of the zeolites in therapy.

Abstract: A laminated bottle with a gas barrier resin layer arranged between polyester resins layers is provided. The gas barrier resin layer includes a plurality of quadrangular segments with two sides extending along the bottle axis and two sides extending around the bottle axis, wherein the segments are arranged at a distance to each other via connecting layers which connect the inner layer and the outer layer.

Abstract: A can (1), in particular for conditioning foodstuff, includes a body composed of a bottom element (2) which is prolonged by a lateral wall (3), the interior surface (9) of the body being at least in part made of tin, the tin surface (9) being partially covered with a coat of protective lacquer (10) to prevent the contact between the tin surface (9) and the foodstuff, the lacquerless tin surface, the “exposed”, being intended to come into contact with the foodstuff in order to set free the tin. The exposed tin surface is constituted of a plurality of “exposed” tin zones (11), which are separated, ones from the others, by lacquered zones (12), the exposed tin zones (11) being distributed on the height of the lateral wall (3), in particular to limit the aesthetic impact due to chemical action of the foodstuff on the exposed tin zones (11).

Abstract: In one aspect, the invention provides a substantially exfoliated nanocomposite material including starch and hydrophobically modified layered silicate clay. In another aspect, the invention provides packaging made from material including the substantially exfoliated nanocomposite material described above. The nanocomposite material has improved mechanical and rheological properties and reduced sensitivity to moisture in that the rates of moisture update and/or loss are reduced. In another aspect, the invention provides a process for preparing the substantially exfoliated nanocomposite material described above, including a step of mixing the starch in the form of an aqueous gel with the hydrophobic clay in a melt mixing device.

Abstract: A basic container comprising a top, a substantially flat bottom and at least three substantially flat sides at an angle of substantially 90° with respect to the bottom, the basic container being leak-free except for a container head in the top with a filling/emptying opening and a means for providing a leak-free closure with a closure means, wherein the axis of the container head is at an acute angle with respect to the bottom; a process for the manufacturing thereof; a top cup adapted to be attachable to the top of the above-described basic container without obstructing the filling/emptying opening of the container head of the basic container; and a plastic container comprising the above-described basic container and the above-described top cup attached with attachable means to the basic container, wherein the top cup does not obstruct the opening of the container head.

Abstract: A valve (10) is disclosed which is operable to automatically transition from a closed state to an open state in response to heat. The valve (10) includes: a cover (12) having at least one opening (12a) therein; at least one adhesive layer (32, 36) for sealing a perimeter of the cover (12) to a wall (22) of a food cooking package (20) on which the valve (10) is positioned; and, a deformable element (14) that shrinks in response to being exposed to heat, the deformable element (14) having a perimeter which is sealed by an adhesive when the valve (10) is in its closed state, wherein shrinking of the deformable element (14) pulls the perimeter of the deformable element (14) away from a site where it is sealed by the adhesive, thereby breaking the seal about the perimeter of the deformable element (14) and transitioning the valve (10) from its closed state to its open state.

Abstract: Described are bottles comprising polyester compositions comprising polyesters which comprise (a) a dicarboxylic acid component having terephthalic acid residues; optionally, aromatic dicarboxylic acid residues or aliphatic dicarboxylic acid residues or ester residues thereof; 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues; and 1,4-cyclohexanedimethanol residues.

Abstract: A method of providing an antioxidant to a medical device and a kit are described.

Abstract: The invention relates to a process for manufacturing and hot-filling a PET container comprising the following steps: a) providing a PET preform capable of being blow molded; b) blow molding the preform in the cavity of a mold so as to form a container; c) removing the container from the mold cavity; d) filling the container with a liquid, the temperature of which is above 80° C.; e) sealing the container in a leaktight fashion; f) sterilizing and cooling the container; and g) shrinking the container, characterized in that: in step a) a PET preform composed of a copolymer based on terephthalic acid is used; in step a), at least one part of the preform is at a temperature greater than or equal to 110° C.; the temperature of the mold used in step b) is less than or equal to 65° C.; and during step g) the container is heated for a duration between 1 and 5 seconds at a temperature between 600 and 1000° C.

Abstract: Nano-silver infused container arrangements are presented including: a nano-silver infused container body defining at least one opening; and a nano-silver infused container lid configured to close off the at least one opening. In some embodiments, the arrangement is a composition of a polymeric compound and a concentration of nano-silver particles. In some embodiments, the polymeric compound includes polyvinyl-pyrrolidione, polypropylene and polycarbonate.

Abstract: The present invention relates to a process for preparing foil-ripened cheese comprising (i) introducing cheese after brining into a cheese-aging packaging containing an opening for receiving cheese, (ii) closing the packaging, and (iii) ripening the cheese, wherein the cheese-aging packaging comprises a thermoplastic, monolithic film and the closed cheese-aging packaging has a water vapor transmission rate of at least 10 g/m2/24 hours at 10° C. and 85% relative humidity and an oxygen permeability of at most 100 cm3/m2/24 hours/atm at 10° C. and 85% relative humidity.

Abstract: Isolated polynucleotide sequences exhibiting endothelial cell specific promoter activity, novel cis regulatory elements and methods of use thereof enabling treatment of diseases characterized by aberrant neovascularization or cell growth are disclosed.

Abstract: The present invention relates generally to fashion accessories designed and made from traffic cone rubber, more particularly related to Bracelets, Key Chains, Necklace Pendants, Earrings, Rings, Wallet, Belts, Zipper Pulls, Belly Button Piercing, Bookmarks, Bra, Door Hanger, Cell phone/Beeper/Pager Holder, Ipod Case, Cell Phone Charm, Wall Mask, Winter Hat/Beanie Hat, Baseball Cap, Tie, Hoodie, Satchel Bag, Sneaker, Decal Snaps, Money Clip, Magnet, Backpack, Watch Band, Relief Carving, Eyeglass Case, Headband, Coaster, Car Decoration, Ornament, Pet Products, Hair Clip, Change Purse, Purse, Pins/Buttons, Anklet, Lanyard, Nose Piercing, Charms, Button, and Cufflinks.

Abstract: Individually packaged topical formulations comprising about 0.25 to about 6% w/w of glycopyrrolate for the treatment of hyperhidrosis, wherein said wipe is contained within a pouch resistant to leakage. The formulations may further comprise ethanol, a buffering agent and water. In addition, the formulations may further comprise a polymer system comprising a hydrophobic polymer in combination with a hydrophilic polymer.

Abstract: The invention provides new composite materials containing aerogels blended with thermoplastic polymer materials at a weight ratio of aerogel to thermoplastic polymer of less than 20:100. The composite materials have improved thermal insulation ability. The composite materials also have better flexibility and less brittleness at low temperatures than the parent thermoplastic polymer materials.

Abstract: A biodegradable tube comprises a mom-rigid paper tubular body defining a lumen for containing a semi-solid composition; a paper tubular cap that slidably mates with the body; and wherein interior surfaces of the each of the body and the cap have a coating that is substantially impermeable to the semi-solid composition. In preferred embodiments the tube body and cap have tapered sealed ends, the coating comprises an adhesive, and the walls of the tube/cap comprise a rolled paper material upon which the coating has been applied. Contemplated semi-solid product materials include for example lip balm, facial cream, lotion, deodorant, sunscreen, caulk, grease sticks, mosquito repellant, and shoe polish.

Abstract: The present invention concerns a sealed package formed from a polymer film comprising a block copolymeric substrate and a heat sealable coating and/or skin layer on the substrate, the package being formed by wrapping the film around an article to be packaged in a manner to obtain at least one region of film overlap, and heat sealing the resulting overlapped film sections to each other to provide at least one sealed region of the package, the sealed region being subsequently openable by manually separating the overlapped film sections, effective without substantial tearing of the film at or around the sealed region.

Abstract: A container comprises a micro cellular foamed polymer having foamed and unfoamed regions, wherein the container has one of a silvery appearance and a white appearance without the use of a colorant.

Abstract: The invention relates to a large-volume packing container for bitumen, the container being made of flexible material and having approximately a truncated pyramid-like basic shape prior to filling, wherein the container is closed at the top by a cover wall (6) extending parallel to the bottom surface and having a preferably central filling opening (10). In order to achieve self-stabilization during filling, or stability during storage, in the temperature range from 100° to 110° C. the woven fabric forming the walls (1, 2, 3, 4, 5, 6) has a stretching capacity of 10-25%, preferably 15-20%, in the direction of the warp and weft, wherein stabilizing means (14), such as pleats, seams, strips or the like are drawn or sewn into the lower region of the fabric panels forming the lateral walls (1, 2, 3, 4) in order to stabilize the woven fabric to forces occurring obliquely to the warp and weft.

Abstract: [Problem] It is an object to provide a composite container in which a shape and a profile of a resin hollow molding body can be discriminated with clarity in the case in which a visual contact is carried out to the inside resin hollow molding body via an outside transparent resin sheathing body, whereby a design property can be displayed to a satisfactory extent, and in which a design property can be displayed to a satisfactory extent even by a combination of the resin hollow molding body and the outside transparent resin sheathing body.

Abstract: The present invention relates to the use of a packaging material in the construction of a container for respiring produce, wherein the packaging material consists of a polyether-ester block copolymer or a blend of polyether-ester block copolymers and which packaging material has all of the following properties: a) permeability for oxygen is at least 40 cc.mm/m2.day.atm at 10° C. b) permeability for carbon dioxide is at least 600 cc.mm/m2.day.atm at 10° C. c) perm selectivity of carbon dioxide to oxygen is at least 10 d) water vapour transmission is at least 0.5 g.mm/m2.day at 10° C. and 85% RH and e) wherein the dimensions of the packaging material are chosen so as to allow oxygen to enter into the container at a rate lower than 110% of the respiration rate of the produce The invention also relates to a container made from the packaging material.

Abstract: Food and beverage containers and methods of coating are provided. The food and beverage containers include a metal substrate that is at least partially coated with a coating prepared from a composition that includes a resin system, a crosslinker, and a catalyst. Preferably, the coating composition is substantially Bisphenol A-free.

Abstract: A composite material and method of forming the same which is useful in a variety of applications, including modified atmosphere packaging, that involves the preparation and characterization of solid, that is, without void spaces, polylactide (PLA) composites containing nanoporous zeolites, among other things.

Abstract: A multilayer plastic container for storing lyophilized products includes at least three layers consisting of inner and outer layers having a moisture vapor transmission rate of not more than 0.1 gm mil/100 sq. in.-day at 73° F. and 95% rh, and an intermediate layer of hygroscopic resin construction having a moisture content less than 1000 ppm. The hygroscopic intermediate layer preferably comprises at least 30% of the total thickness of the three layers. The inner and outer layers preferably are of cyclic olefin polymer or cyclic olefin copolymer construction, and the hygroscopic intermediate layer preferably is of amorphous nylon construction. The container preferably is empty and sealed within a secondary container, such as a metallized bag, that is impervious to moisture.

Abstract: A composite wafer carrier according to an embodiment of the present invention comprises an operative portion formed of a first thermoplastic material and a support portion formed of a second different thermoplastic material. One of the operative portion and support portion is overmolded onto the other to form a gapless hermitic interface that securely bonds the portions together. The operative portion may be a transparent window, a portion of a latching mechanism or a wafer contact portion. Preferred embodiments of the invention include wafer carriers with said features, process carriers with said features and a process for manufacturing wafer carriers with said features.

Abstract: A composition-of-matter comprising a substance usable in producing packaging material and at least one compound selected from the group consisting of ar-turmerone, a sesquiterpene alcohol and a turmeric oleoresin solid residue.

Abstract: A use of a material made of cyclic olefin copolymers and graft copolymers of ethylene and octene for producing a container for storing inhalation anesthetic agents, and said container comprising a container body and a container cap, wherein the internal surface material of said container body is made of cyclic olefin copolymers and graft copolymers of ethylene and octene.

Abstract: The invention relates to a receptacle particularly for solid or pasty products, its method of manufacture and a packaging for such a product comprising a receptacle supporting it and a container removably receiving this receptacle. The invention applies to the packaging of all solid or semi-solid products and in particular to food products such as unripened cheeses or cheese specialties. This receptacle (1) has a bottom (3) and a side wall (8) which extends from the bottom and which incorporates rigid wall retention means (4) capable of keeping it in an upright position relative to the bottom, these retention means being spaced over the periphery of the wall while being connected together in twos by flexible means (5) for unfolding/uplifting the wall which are formed by determined zones of at least one flexible film (2) and which are capable of allowing the reversible transition of the wall from its upright position to a folded-down position in which it extends the bottom in a more fanned-out manner.

Abstract: A breach detection system for a container includes at least two panels having a first electrical circuit mounted thereto. The panels are configured for attachment to a container. The first electrical circuit is configured to detect an intrusion through any portion of the panel and generate an intrusion signal when the intrusion occurs. A connector electrically connects the first electrical circuits of two panels of the container.

Abstract: A corrosion-resistant pressure vessel steel is provided. The corrosion-resistant pressure vessel is formed by aluminization of a pressure vessel steel and deliberate oxidation of the layer which has been enriched in this way. Also provided is a process for producing a corrosion-resistant pressure vessel product. The process includes alitizing the pressure vessel steel and then oxidizing the steel before it is used for the first time. Lastly, a gas turbine component using the pressure vessel steel product is provided.

Abstract: A packaging body comprising a bag body filled with a compound of the following formula (1) and further filled with an inert gas so as to occupy 80 vol % or more with respect to the total capacity of an internal space formed by the bag body.

Abstract: The present invention relates to a new pharmaceutical blister with reduced permeability to water vapor and gas. It is proposed according to the invention to coat conventional blisters with a silicon oxide-containing functional layer to protect against gases, water vapor and organic molecules.

Abstract: A consumable packaging composition is provided for packaging clear-binders, made of one or several packaging materials, alone or in combination, such as plastics, polymers and extenders, and which melting point is adjusted so that the packaging material melts when in contact with the hot aggregates as methods of using them, are also disclosed. Optionally, and prior to packaging, the clear-binder may be mixed together with one or several color pigments used for production of colored mixes depending on the end-user requirements. In a preferred practice, the size of the packaged clear-binder product containers is adjusted such that, after transport and storage, the packaged material together with the packaging material can be directly incorporated along any of the steps of a production process that uses clear-binders. The packaged clear-binder material permits handling and manipulation to be reduced to the minimum necessary, thus avoiding the need for pre-heating and hot-storage of clear-binders.

Abstract: The present invention is directed to a deep draw microcellularly foamed polymeric container comprising a polymeric sidewall integrally connected to a polymeric base along a bottom edge. The polymeric sidewall and base are contiguous with each other and define a shape of an open top container. The polymeric sidewall and base have a contiguous inner microcellular foam structure (having average cell diameters ranging from about 5 to about 100 microns) surrounded by a smooth outer skin layer integrally connected therewith. The polymeric sidewall defines a container height and a top opening, wherein the top opening defines a top opening width, and wherein the polymeric base defines a container base width, and wherein the area defined by the top opening is greater than the area defined by the polymeric base, and wherein the ratio of the container height (h) to the top opening width (w) is greater than about 1:1 (h:w).

Abstract: A disposable biodegradable container made of a mixture of biodegradable materials to make a disposable container and a method of manufacturing the same are disclosed. The biodegradable material is produced by mixing chaff, saw dust, straw, pulp or a combination thereof with starch, palm fiber, and melamin resin to produce a mixture; pouring the mixture into a mold; and pressurizing the mixture at high temperature and a high pressure at three times. Accordingly, a disposable container having an excellent hardness, elasticity and compact texture can be manufactured by using the biodegradable materials. Also, it is possible to further enhance physical properties of a disposable container by mixing the mixture with esters, polysorbates, stearyl sodium lactates.

Abstract: A package that is opened by deforming or bending the package along the die cut on the surface of the package is disclosed. The package will fracture or break at a die cut providing an opening in the package to access the contents inside. The package is formed with a semi-rigid layer affixed to a flexible backing layer forming an inner cavity. A die cut extends from at least an area adjacent one edge of the semi-rigid layer to at least an area adjacent another edge of the semi-rigid layer to provide a fracture point for the package to break. At least a portion of the die cut extends along both the lateral width and the longitudinal width of the semi-rigid layer to allow a greater surface area of the substrate to be accessible. Thus, dispensing of the substrate is easier for the user.

Abstract: A polar element for a permanent magnet, includes at least one permanent magnet; a case structure, inside which the permanent magnet is placed; a fitting element adapted to be coupled to the case structure to seal the permanent magnet inside a sealed case formed by the case structure and the fitting element; and filling material inside the case for coupling the permanent magnet to the case structure and/or to the fitting element. Either the case structure or the fitting element is made of ferromagnetic material, the other one being made of non-magnetic material. Mechanically bendable flanges or protruding parts are formed in the case structure and/or the fitting element, and corresponding surfaces are respectively formed in the fitting element and/or the case structure, substantially opposing the flanges or protruding parts such that the flanges or protruding parts are bendable to the corresponding surfaces.

Abstract: Polyester compositions based on 1,3-propanediol and aromatic and aliphatic diacids that can contain a large fraction of biologically derived content are disclosed. Transesterification between polyesters in blends of such compositions is greatly reduced using phosphorous-containing additives. The blends have properties similar to poly(ethylene terephthalate).

Abstract: [PROBLEMS] To provide: an oxygen-absorbing resin composition which needs no transition metal compound, exhibits excellent oxygen absorbability at room temperature, produces little unpleasant odor during the absorption of oxygen, and enables to produce a molded article having excellent transparency; an oxygen-absorbing molded article comprising the oxygen-absorbing resin composition; and a packaging material and a packaging container each comprising the molded article. [MEANS FOR SOLVING PROBLEMS] Disclosed is an oxygen-absorbing resin composition comprising: a resin composition (A) which comprises an oxygen-absorbing resin (A1) having a cycloene structure in the molecule and a softening agent (A2) and has a glass transition temperature of ?30 to +30° C.; and a resin (B) having an oxygen permeability of 100 to 500 cc 20 ?m/m2 day atm (25° C., 65% RH), wherein the resin composition (A) is dispersed in the resin (B). The softening agent (A2) is preferably liquid paraffin or polybutene.

Abstract: Soap bars that are not of essentially a square or rectangular shape, but of a generally rectangular shape, can be packaged using a single plastic film wrapper. This plastic film preferably is biaxially oriented polypropylene of from about 60 micron to about 180 microns. It can be a monolayer or a multilayer laminated. However, any plastic film having a Taber stiffness of more than about 5 and preferably about 7 to 20 can be used. The soap bar in order to facilitate making an effective longitudinal seal on the bottom of the soap bar package should have a planar surface adjacent to the position of the overlapping longitudinal edges of the wrapping film. This provides a surface for the sealing plate to seal the longitudinal edges against.

Abstract: A hot water tank having, on the inner surface thereof, a back bead formed by TIG-welding with no back gas sealing of steel members to each other having a composition comprising, % by mass, C: at most 0.025%, Si: at most 1%, Mn: at most 1%, P: at most 0.045%, S: at most 0.01%, Ni: from 0.1 to 1%, Cr: from more than 21 to 25%, Mo: from 0.1 to 2%, Al: from 0.02 to 0.3%, N: at most 0.025%, and Cu: from 0 to 1%, and containing at least one of Ti: from 0.05 to 0.4% and Nb: from 0.05 to 0.5%, with the balance of Fe and inevitable impurities, wherein the Cr concentration in the steel basis material in the area having oxide scale soluble in an aqueous chloride solution, as formed therein in the heat-affected zone on the welded back side thereof, is at least 16% by mass in the depth region of at least 10 nm from the steel basis material/oxide scale interface.

Abstract: Disclosed are molded articles comprising a thermoplastic polymer composition comprising, consisting essentially of, or prepared from (a) about 30% to about 99 weight % based on the combination of (a) and (b) of a poly(ethylene terephthalate) homopolymer or copolymer; and (b) about 1 to about 70% weight % based on the combination of (a) and (b) of a poly(trimethylene terephthalate) homopolymer or copolymer. Specific embodiments include injection-molded preforms and blown bottles.

Abstract: A clam shell type container having an injection moulded base, an injection moulded lid, and a web interconnecting the base and lid, wherein the web is formed from an in-mould label. The in-mould label is preferably deposited into a mould that simultaneously forms the base and lid, with the label being deposited into the mould prior to the injection of molten material. Upon formation, the label extends contiguously into the base and lid and becomes integrally adhered with the walls of the base and lid.

Abstract: Polyester compositions are disclosed that include polyester polymers or copolymers having incorporated therein metallic nickel particles that improve the reheat properties of the compositions. Processes for making such compositions are also disclosed. The nickel particles may be incorporated in the polyester by melt compounding, or may be added at any stage of the polymerization, such as during the melt-phase of the polymerization. A range of particle sizes may be used, as well as a range of particle size distributions. The polyester compositions are suitable for use in packaging made from processes in which a reheat step is desirable.

Abstract: The instant invention is a high-density polyethylene composition, method of producing the same, articles made therefrom, and method of making such articles. The high-density polyethylene composition according to instant invention includes a first component, a second component, and a third component. The first component is a high-density polyethylene polymer having a density in the range of 0.940 to 0.980 g/cm3. The second component is polyethylene glycol, and the third component is octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate. The high-density polyethylene composition of the instant invention has a Yellowness Index of less than about ?2.5 at 0 hour of accelerated aging at 100° C. according to ASTM D-6290. The process for producing the high-density polyethylene composition according to instant invention includes the following steps: (1) providing a first component, wherein the first component is a high-density polyethylene polymer having a density in the range of 0.940 to 0.

Abstract: A packaging component, having a wall including a layer for direct contact with a product contained within the packaging, said layer formed of an organic polymer having disposed therein 1) a first material reactive with at least one component of the product contained within the packaging or with a physical or chemical contaminant thereof, and 2) a second component in the form of particles which perturb or emit, naturally or under the influence of an artificial source of excitation, a physical field which is remotely detectable and which confirms that the first material is also present. The reactive substance is typically a substance having a biocidal effect, an organoleptic additive, an oxygen-absorbing agent, an emitter of carbon dioxide or sulfur dioxide, a humidity absorber, an antioxidant or a UV filter, and the physically active particles are typically ferromagnetic, x-ray absorbent, an MRI contrast agent, luminescent or thermochromic.

Abstract: Disclosed are environmentally friendly polymeric composite materials and products that can be formed from the composites. The polymeric composites can include a lactide-based polymeric matrix reinforced with fibers derived from renewable resources and optionally including one or more beneficial agents such as, for instance, naturally occurring UV blockers or absorbents, anti-oxidants, anti-microbials, and the like. The composite materials can be formed into a desired structure according to low energy formation processes and can be designed for controlled degradation. In one particular embodiment, the composite materials can be formed to produce containers for storing and protecting environmentally sensitive materials such as pharmaceuticals or nutraceuticals. Beneficially, the disclosed materials can be formed entirely from renewable resources.

Abstract: A compression-moulded tray of fibre material, said tray being formed of fibre material in a compression method, from a suspension of mechanical pulp of cellulose. The formed tray has been formed by press-drying using heat to a dry content of 80-95%, preferably 90-95%, and the fibre material of the formed tray has a density in the order of 400-650 kg/m3. The inside of the tray is provided with a protective barrier.

Abstract: A method according to the present invention for producing water absorbent resin powder is a method for producing water absorbent resin having a surface cross-linked structure, and includes: a polymerization step in which an unsaturated monomer aqueous solution is polymerized; a drying step in which a hydrogel cross-linked polymer obtained in the polymerization step is dried; a surface treatment step in which the hydrogel cross-linked polymer or a dried hydrogel cross-linked polymer is subjected to a surface treatment; and a sorting step, carried out after the drying step, in which a foreign matter included in a water absorbent resin is color-sorted from the water absorbent resin entirely or partially. As a result, it is possible to obtain a water absorbent resin which has high properties and is less likely to be colored. In this way, there is provided the water absorbent resin powder production method in which the color sorting technique is used to remove foreign matters from the water absorbent resin.