METHOD FOR RECYCLING HIGH-MOLECULAR-WEIGHT MATERIAL, AND FIBER PRODUCT

Title:

METHOD FOR RECYCLING HIGH-MOLECULAR-WEIGHT MATERIAL, AND FIBER PRODUCT

Document Type and Number:

WIPO Patent Application WO/2024/024571

Kind Code:

A1

Abstract:

The present invention addresses the problem of providing a recycling method for recovering a highly recyclable high-molecular-weight material from a solid mixture containing a polyester and the high-molecular-weight material by a process having a reduced environmental load and in a simple manner. The method for recycling a high-molecular-weight material comprises heating a solid mixture of a polyester and the high-molecular-weight material in the presence of water, and then separating the polyester together with water from the solid mixture by melting and recovering the high-molecular-weight material as a solid material, in which, when the melting point of the polyester in air is defined as Tm, the high-molecular-weight material has a higher melting point than Tm or, alternatively, the high-molecular-weight material has no melting point and has a solid form at Tm, and the heating is performed at a temperature of (Tm-70)°C to (Tm-10)°C inclusive.

Inventors:

MATSUMURA MEI (JP)
INAGAKI JUN (JP)
ITO KATSUYA (JP)
SASAKI MITSURU (JP)

Application Number:

PCT/JP2023/026272

Publication Date:

February 01, 2024

Filing Date:

July 18, 2023

Export Citation:

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Assignee:

TOYO BOSEKI (JP)
UNIV KUMAMOTO NAT UNIV CORP (JP)

International Classes:

C08J11/14; B29B17/00; D06M11/05

Domestic Patent References:

WO2015137365A1

2015-09-17

Foreign References:

JP2005330211A	2005-12-02
JP2012254400A	2012-12-27
JP2008308416A	2008-12-25
JP2003064387A	2003-03-05
JP2003164827A	2003-06-10
US5565158A	1996-10-15