The present invention provides resin beads that can provide various types of products, such as a cosmetic having excellent tactile impression, spreadability on the skin, and transparency, that can be substituted for resin particles composed of a synthetic material derived from petroleum, and that have favorable biodegradability, and the present invention also provides various types of products, such as a cosmetic using the resin beads. The resin beads are formed with a resin containing cellulose as a main component. The resin beads have a cumulative 50% particle size on a volume basis of 50 ?m or smaller, a degree of sphericity of 0.7 to 1.0, a degree of surface smoothness of 70 to 100%, a degree of solidity of 50 to 100%, and a biodegradation rate for 5 days, as measured in accordance with JIS K6950:2000 (ISO 14851:1999), of 20% or more, and the content of the cellulose in the resin is 90 to 100% by mass. In addition, the present invention provides a product of any one of a cosmetic, a dermatological preparation, a paint, a shaped article, a film, a coating agent, and a resin composition which contain the resin beads.

An object of the invention is to provide a material comprising ultrafine cellulose fibers, having good dispersibility of fine particles in an aqueous medium containing ultrafine cellulose fibers. According to the invention, there is provided a material comprising ultrafine cellulose fibers, wherein the content of the ultrafine cellulose fibers is 80% by mass or more, and the haze value of a sample, which has been prepared by adding the material comprising ultrafine cellulose fibers to pure water to a solid concentration of 0.4% by mass, and stirring the mixture with a disperser under conditions of 1500 rpm and 5 minutes, is 20% or less.

An object of the present invention is to improve the strength of a sheet containing substituent-introduced ultrafine fiber under high-humidity conditions while maintaining its high transparency. The sheet of the present invention comprises ultrafine fiber having an ionic substituent, and a divalent or higher metal, and has a haze of 10.0% or less.

A process for producing a cellulose based sorbent material for the removal of water soluble contaminants from water and other aqueous solutions comprising reacting one or more biomass based cellulose containing raw materials with dilute phosphoric acid where the reaction mixture containing said cellulose containing materials is heated to a reaction temperature and after completion of the reaction time, separation of the dilute phosphoric acid solution from the remaining insoluble raw material, neutralization of the solution by means of a suitable neutralizing agent resulting in precipitation of the modified cellulose, and then separating, washing and removing excess water from the resultant precipitate.

A rubber composition for pneumatic tires comprising a diene-based rubber, carbon black, and phosphoric acid-modified cellulose nanofiber. It is preferred that the cellulose nanofiber is contained in an amount of 0.1 to 50 parts by mass per 100 parts by mass of an entire amount of the diene-based rubber. It is preferred that the carbon black is contained in an amount of 1 to 80 parts by mass per 100 parts by mass of an entire amount of the diene-based rubber. It is preferred that when a content of the carbon black and a content of the cellulose nanofiber per 100 parts by mass of an entire amount of the diene-based rubber are respectively defined as X and Y, X+Y<80 and 0.05<(Y/(X+Y)<0.5 are satisfied.

One or more aspects of the present disclosure have an object to provide a novel solid water-disintegrable composite easily disintegrable in room temperature water while containing a polymer compound, such as a polyvinyl alcohol, poorly soluble or insoluble in room temperature water and soluble in hot water. One or more aspects of the present disclosure relate to a solid water-disintegrable composite containing a polymer compound poorly soluble or insoluble in water at 25 C. and soluble in water at 80 C. or higher and a cellulose nanofiber with a sulfate ester group. Another one or more aspects of the present disclosure relate to a method for producing the composite, and the method includes a step of preparing a dispersion liquid containing a solvent, and the polymer compound and the cellulose nanofiber dispersed in the solvent, and a step of removing the solvent from the dispersion liquid to obtain the composite.