Kao Corporation

The University of Tokyo

Kenta Mukai

Yoshiaki Kumamoto

Takehiko Tojo

Akira Isogai

Naomi Amari

Motoi Konishi

Koji Saito

Masahiro Mori

Akira Takenaka

Akiyoshi Kimura

Takehiko Tohjo

Taiki Yoshino

Tetsuji Kito

Toru Ugajin

Hironobu Kawajiri

Masahiro Fujioka

Takahiro Maezawa

Kazuhiro Iitaka

Ryota Shiiba

Kaori Ishida

Naoki Honbo

Hiroya Suzuki

Yuki Otorii

Keitaro Yoneta

A method for forming a coating on a skin surface using a nanofiber sheet, the method including: (1) applying to the skin a sheet transparentizing agent containing 2 mass % or more of one or more oil agent; and (2) transferring a white nanofiber sheet mainly composed of a water-insoluble polymer to the skin after (1), where the transferred white nanofiber sheet becomes transparent and the coating is a transparent coating through which the skin is visible.

Method for forming coating on skin surface

The coating formation method of the present invention is a method for forming a coating on a surface of a coating formation target. The formation method of the present invention includes an electrostatic spraying step of electrostatically spraying a composition directly onto the coating formation target, thereby forming a coating composed of a deposit containing fibers. The composition contains a component (a), a component (b), and a component (c) below. (a) One or more volatile substances selected from water, alcohols, and ketones. (b) A polymer having coating formability. (c) A liquid agent containing one or more selected from oils and polyols that are in a liquid form at 20&#xb0; C.

Method for manufacturing coating film by electrostatic spraying

A method for producing ultrafine fibers of the present invention includes forming an electric field between an discharging nozzle from which a raw resin is discharged and a charging electrode which is disposed apart from the discharging nozzle, and supplying the raw resin which has been heated and melted into the electric field from the discharging nozzle to spin the raw resin. The raw resin is a resin mixture which contains a resin having a melting point and an additive, and satisfies a relation (I) below:&#x2265;1.0&#xd7;10&#x2003;&#x2003;(I)wherein A represents the absolute value (&#x3a9;) of electrical impedance of the raw resin at 50&#xb0; C., and B represents the absolute value (&#x3a9;) of electrical impedance of the raw resin at a temperature 50&#xb0; C. higher than a melting point of the raw resin.

Ultrafine fiber production method

A polyester resin composition containing a polyester resin, and a fine cellulose fiber composite having an average fiber diameter of from 0.1 to 200 nm, wherein the fine cellulose fiber composite contains fine cellulose fibers and hydrocarbon groups being connected thereto via an amide bond. The polyester resin composition of the present invention can be worked into a molded article by thermoforming or injection-molding, and is suitably used for various industrial applications, such as daily sundries, household electric appliance parts, packaging materials for household electric appliance parts, and automobile parts. In addition, the fine cellulose fiber composite has high dispersibility against various resins and can exhibit thickening effects, so that it is suitable as various thickeners or the like.

Polyester resin composition

A composite material of the invention is a mixture of cellulose microfibers having a carboxyl group content of 0.1 to 3 mmol/g and a moldable polymeric material selected from the group consisting of a biomass-derived polymer and a petroleum-derived polymer. The biomass-derived polymer is preferably polylactic acid or pulp. The cellulose microfibers are preferably present in an amount of 0.01% to 60% by mass. Another composite material of the invention is a mixture of cellulose composite microfibers and a moldable resin, the cellulose composite microfibers being obtained by adsorbing a surfactant onto cellulose microfibers having a carboxyl group content of 0.1 to 3 mmol/g.

Composite material

Provided is a material for gas barrier containing cellulose fibers having an average fiber diameter of not more than 200 nm, wherein the content of the carboxyl group in a cellulose composing the cellulose fiber is 0.1 to 2 mmol/g. A molded composite having gas barrier properties such as high oxygen barrier properties can be produced by applying the material for gas barrier on a substrate and drying.

Gas barrier material

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Utsunomiya, Japan

Kenta Mukai