SEPARATION METHOD OF MIXED FIBER, PRODUCTION METHOD OF FIRST FIBER, PRODUCTION METHOD OF DECOMPOSED MATERIAL OF SECOND FIBER, AND PRODUCTION METHOD OF DECOMPOSED MATERIAL OF THIRD FIBER

• Main Authors: ITO TOMOMICHI, YAMAMOTO KEIJI, KAJIWARA KANJI, SUZUOKA AKIHIRO, HIRATA YUICHI
• Format: Patent
• Language: English; Japanese
• Published: 07.03.2019
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; GENERAL PROCESSES OF COMPOUNDING; LAUNDERING; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

To provide a separation method of mixed fiber, in which environmental load is reduced.SOLUTION: A separation method of a mixed fiber of the present invention includes a decomposition step of decomposing at least one of a second fiber and a third fiber by heat treating a mixed fiber containing at least two selected from the group consisting of a first fiber, the second fiber and the third fiber under the presence of organic acid, in which the first fiber is a fiber having a structural unit bonded by a carbon-carbon (C-C) bond, a carbon-oxygen bond (C-O), a urethane bond or an ester bond, the second fiber is a fiber having its structural unit bonded by a β-glycoside bond, and the third fiber is a fiber having a structural unit bonded by an amide bond.SELECTED DRAWING: Figure 1 【課題】 環境負荷が低減された、混合繊維の分離方法を提供することを目的とする。【解決手段】 本発明の混合繊維の分離方法は、有機酸の存在下、第１の繊維、第２の繊維および第３の繊維からなる群から選択された少なくとも２つを含む混合繊維を加熱処理することにより、前記第２の繊維および前記第３の繊維の少なくとも一方を分解する分解工程を含み、前記第１の繊維は、その構造単位が、炭素−炭素（Ｃ−Ｃ）結合、炭素−酸素結合（Ｃ−Ｏ）、ウレタン結合、またはエステル結合で結合する繊維であり、前記第２の繊維は、その構造単位が、β−グリコシド結合で結合する繊維であり、前記第３の繊維は、その構造単位が、アミド結合で結合する繊維であることを特徴とする。【選択図】 図１