MANUFACTURING METHOD OF COMPOSITE MATERIAL CONTAINING CELLULOSE

• Main Author: NAKAJIMA KEIZO
• Format: Patent
• Language: English; Japanese
• Published: 15.11.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS; DERIVATIVES THEREOF; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; POLYSACCHARIDES; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

PROBLEM TO BE SOLVED: To overcome situation that a treatment method capable of continuous production at low cost without using a specific device, although various methods for using a nanofiber by micronizing a cellulose fiber to nano-order as a filler and blending the same into a resin are proposed for improving physical properties such as resin strength.SOLUTION: A manufacturing method of a composite material containing cellulose has a process for adding an addition material to a material containing cellulose, and chemically modifying and/or fibrillating them, a process for separating and removing at least a part of the additive material as excess from cellulose of which a part is chemically modified and/or fibrillated by the addition material, and a process for mixing cellulose chemically modified and/or fibrillated by the addition material and a thermoplastic resin. Because the above described can be achieved by using a two-shaft type extruder which is generally used thereby, the composite material can be produced at low cost and in short time.SELECTED DRAWING: Figure 1 【課題】樹脂強度などの物性を向上させるために、セルロース繊維をナノオーダーにまで微細化させたナノファイバーを充填剤とし、樹脂中に配合させる方法が種々提案されているが、特殊な装置を使用せず、安価に連続生産可能な処理方法が確立されていない。【解決手段】セルロースを含む複合材料の製造方法は、セルロースを含む材料に添加材を加え、化学修飾及び／または解繊する工程と、セルロースの少なくとも一部が添加材により化学修飾及び／または解繊されたセルロースから、余剰となった添加材の少なくとも一部を分離除去する工程と、添加材により化学修飾及び／または解繊されたセルロースと熱可塑性樹脂を混練する工程と、を有する。これにより、一般的に使用されるような二軸式の押出機を用いて上記を実現できるため、安価でかつ短時間で生産可能となる。【選択図】図１