Abstract: An embodiment of the present disclosure provides fine cellulose fibers that satisfy, in measurement using an automatic fiber shape analyzer, all of (i) the length weighted average fiber length of fibers having a fiber length of at least 100 ?m is 110-500 ?m, (ii) the average fiber diameter is at most 42.5 ?m, (iii) the fine fiber area ratio is at most 90%, (iv) the number frequency of fibers having a fiber length of 20-56 ?m is at most 97% among fibers having a fiber length of less than 100 ?m, (v) the number frequency of fibers having a fiber length of at least 411 ?m is at most 54% among fibers having a fiber length of at least 100 ?m, and (vi) the average fiber diameter is 20-150 nm in terms of specific surface area.

Abstract: The purpose of the present disclosure is to provide a composite molded body that can be suitably used as a ventilation adjustment layer having excellent sound absorbability between a low frequency band and an intermediate frequency band, and has excellent three-dimensional shapeability. According to the present disclosure, a composite molded body including fibrillated fibers and short fibers is provided. The composite molded body has a surface density of 30 g/m2 to 1000 g/m2 and an air resistance of 15.0 s/(100 mL·mm) or less per unit thickness. According to the present disclosure, a composite sound absorbing material with a thickness of 10 mm or less in which a ventilation adjustment layer and a porous material are stacked is also provided.

Abstract: An embodiment of the present disclosure provides fine cellulose fibers that satisfy, in measurement using an automatic fiber shape analyzer, all of (i) the length weighted average fiber length of fibers having a fiber length of at least 100 ?m is 110-500 ?m, (ii) the average fiber diameter is at most 42.5 ?m, (iii) the fine fiber area ratio is at most 90%, (iv) the number frequency of fibers having a fiber length of 20-56 ?m is at most 97% among fibers having a fiber length of less than 100 ?m, (v) the number frequency of fibers having a fiber length of at least 411 um is at most 54% among fibers having a fiber length of at least 100 ?m, and (vi) the average fiber diameter is 20-150 nm in terms of specific surface area.

Abstract: The present invention provides a cellulose composite composed of a cellulose and a polysaccharide, wherein a Bragg spacing by small angle X-ray scattering (SAXS) of a sediment obtained by subjecting a 0.1% by mass aqueous dispersion of the cellulose composite to a centrifugation treatment is 8.6 nm or more, and a method for producing the same.

Abstract: The aqueous dispersion of a peelable coating composition of the present invention is (a) a mixture containing 5-40% by weight of an emulsion of an acrylic copolymer having a glass transition temperature (hereinafter referred to as “Tg”) of not lower than 40° C., and 95-60% by weight of an emulsion of another acrylic copolymer having a Tg ranging from −20° C. through 5° C. The acrylic copolymer emulsion mixture (b) contains ethylenically unsaturated vinyl monomers having acid value in a total amount of 0.5-1.0% by weight, and (c) at least one of the acrylic copolymer emulsions is an acrylic copolymer which has been polymerized by use of a reactive surfactant, and (d) the particle size of the acrylic copolymer emulsions is not more than 200 nm.

Abstract: The aqueous dispersion of a peelable coating composition of the present invention is (a) a mixture containing 5-40% by weight of an emulsion of an acrylic copolymer having a glass transition temperature (hereinafter referred to as “Tg”) of not lower than 40° C., and 95-60% by weight of an emulsion of another acrylic copolymer having a Tg ranging from −20° C. through 5° C. The acrylic copolymer emulsion mixture (b) contains ethylenically unsaturated vinyl monomers having acid value in a total amount of 0.5-1.0% by weight, and (c) at least one of the acrylic copolymer emulsions is an acrylic copolymer which has been polymerized by use of a reactive surfactant, and (d) the particle size of the acrylic copolymer emulsions is not more than 200 nm.

Abstract: The aqueous dispersion of a peelable coating composition of the present invention is (a) a mixture containing 5-40% by weight of an emulsion of an acrylic copolymer having a glass transition temperature (hereinafter referred to as “Tg”) of not lower than 40° C., and 95-60% by weight of an emulsion of another acrylic copolymer having a Tg ranging from −20° C. through 5° C. The acrylic copolymer emulsion mixture (b) contains ethylenically unsaturated vinyl monomers having acid value in a total amount of 0.5-1.0% by weight, and (c) at least one of the acrylic copolymer emulsions is an acrylic copolymer which has been polymerized by use of a reactive surfactant, and (d) the particle size of the acrylic copolymer emulsions is not more than 200 nm.