Title:
METHOD FOR PRODUCING FIBERBOARD
Document Type and Number:
WIPO Patent Application WO/2018/194096
Kind Code:
A1
Abstract:
An objective of the present invention is to provide a method for producing fiberboard with which fiberboard exhibiting high bend strength and high rigidity at a wide range of heating temperatures and a wide range of pressures and heating durations. In the present invention, fiberboard having an initial flexural modulus of at least 300MPa in a three-point bending test is obtained by forming a fiber web by aggregating core-sheath composite fibers, of the which the core component is formed from a copolymer comprising ethylene glycol and terephthalic acid and the sheath component is formed from a copolymer comprising ethylene glycol, adipic acid, terephthalic acid, isophthalic acid and/or diethylene glycol. The fiber web is then compressed in the thickness direction thereof and heated so that the sheath component softens or melts and the core-sheath composite fibers are fused together and molded into a flat plate shape.
Inventors:
HANAYA KAZUTOSHI (JP)
AKAO MASAYA (JP)
NAGATSUKA YUSUKE (JP)
AKAO MASAYA (JP)
NAGATSUKA YUSUKE (JP)
Application Number:
PCT/JP2018/016013
Publication Date:
October 25, 2018
Filing Date:
April 18, 2018
Export Citation:
Assignee:
UNITIKA LTD (JP)
International Classes:
D01F8/14; D04H1/541
Domestic Patent References:
| WO2006092835A1 | 2006-09-08 | |||
| WO2018110524A1 | 2018-06-21 |
Foreign References:
| JPH08188947A | 1996-07-23 | |||
| JP2004107860A | 2004-04-08 | |||
| JP2018009256A | 2018-01-18 |
Attorney, Agent or Firm:
OKUMURA Shigeki (JP)
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