Optimal Impregnation Amounts of Flame Retardant for Semi-combustible Hinoki Cypress (Chamaecyparis obtusa) Plywood

Eun-Suk Jang; Yasuyo Anno; Woo-Chan Park; Hee-Jun Park

Authors

Eun-Suk Jang Research Institute of Human Ecology, College of Human Ecology, Jeonbuk National University, Jeonju 54896, South Korea; Sambo Scientific Co., Ltd., R&D Center, Seoul 07258, South Korea https://orcid.org/0000-0001-5995-8617
Yasuyo Anno NS Wood Science R&D Center, Sakaiminato 6840075, Japan https://orcid.org/0009-0000-9022-3424
Woo-Chan Park Dai Hyun Wood Science R&D Center, Incheon, 22857 Korea https://orcid.org/0009-0006-0089-7411
Hee-Jun Park Department of Housing Environmental Design, College of Human Ecology, Jeonbuk National University, Jeonju 54896, South Korea https://orcid.org/0000-0002-7452-227X

Keywords:

Optimal impregnation amount, Flame retardant, Semi-combustible performance, Hinoki cypress plywood, Building material, Impregnation

Abstract

This study aimed to determine the amount of flame retardant for semi-combustible performance required to comply with the Ministry of Land, Infrastructure, and Transport Notice 2023-24 for hinoki cypress (Chamaecyparis obtusa) plywood, which is commonly used as a building material. A cone calorimeter was used to observe the changes in the total heat release (THR) depending on the solid content of the flame-retardant impregnation (SCFI). The relationship between the SCFI and THR was expressed as an exponential function. The solid content of the flame-retardant impregnation required to meet the prescribed standard of 8.0 MJ/m² was 108 kg/m³ (semi-combustible performance standards) for hinoki cypress plywood.

Optimal Impregnation Amounts of Flame Retardant for Semi-combustible Hinoki Cypress (Chamaecyparis obtusa) Plywood

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