Daicel Corporation

Hokkaido University

Nippon Paper Industries Co., Ltd.

Haruo Konno

Shu Shimamoto

Yasumitsu Uraki

Yasunori Nanri

An object of the present disclosure is to provide a cellulose acetate film having excellent bending properties and high transparency. The subject cellulose acetate film contains cellulose acetate having a cellulose triacetate I crystal structure, the cellulose acetate film having a light transmittance of 70% or higher at 660 nm.

Cellulose acetate film and method for producing cellulose acetate film

An object of the present invention is to provide cellulose acetate that has excellent compatibility with a resin, can reinforce a resin, and has excellent thermal stability. An embodiment of the present invention is cellulose acetate having a cellulose triacetate I crystal structure, wherein a temperature at which a weight loss relative to weight at 100&#xb0; C. reaches 5% is 200&#xb0; C. or higher when the cellulose acetate is heated at a heating rate of 10&#xb0; C./min under a nitrogen atmosphere.

Cellulose acetate, cellulose acetate fiber, cellulose acetate composition, method for producing cellulose acetate, and method for producing cellulose acetate composition

Disclosed herein is cellulose acetate fibers that have an excellent affinity for resins and is capable of reinforcing resins. The cellulose acetate fibers have a cellulose triacetate I crystal structure and a number-average fiber diameter of 2 nm or more but 400 nm or less.

Cellulose acetate fibers, cellulose acetate composition, and method for producing same

Calcium carbonate in the form of aragonite crystals suitable for use as a filler for papermaking to give useful properties for bulk, whiteness, opacity, wire abrasion and yield is obtained by taking advantage of the causticization step. Herein disclosed is a process for producing calcium carbonate in the form of aragonite crystals which is useful as a filler for papermaking via the causticization step of the sulfate or soda pulping process, comprising adding an aqueous alkaline solution having a hydroxide ion level of 3 mol/l or less and containing 0.25 mol or less of carbonate ion per 1 mol of quick lime to quick lime and/or slaked lime at a quick lime concentration of 1&#x2013;60% by weight with stirring to prepare milk of lime, and then adding green liquor to said milk of liquor at a loading rate of 0.002&#x2013;0.12 g (sodium carbonate)/min/g (quick lime) to perform a causticization reaction at a temperature of 30&#x2013;105&#xb0; C.

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Tokyo, Japan

Haruo Konno