単板積層材(LVL)のアルデヒド類および揮発性有機化合物(VOC)放散特性  [in Japanese] Aldehyde and Volatile Organic Compound Emissions from Laminated Veneer Lumber  [in Japanese]

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Abstract

市販の単板積層材(LVL)から放散されるアルデヒド類,揮発性有機化合物(VOC)をJIS小形チャンバー法を用いて経時的に測定し,単板樹種(ラーチ,ラジアータパイン,スギ),接着剤の種類,ホルムアルデヒドキャッチャー剤が放散量に及ぼす影響を評価した。<BR>ホルムアルデヒド,アセトアルデヒドおよび総揮発性有機化合物(TVOC)の放散速度は,時間とともに減少する傾向を示した。ホルムアルデヒドキャッチャー剤を使用したLVLのホルムアルデヒド放散速度は,使用しない材料の50%以下となった。21日経過後のホルムアルデヒド,アセトアルデヒド放散速度は,本研究で用いたLVLの中ではラジアータパインLVLで最も高い値を示した。LVLから放散された主なVOCは木材由来と考えられる成分であり,その種類と放散量には単板樹種が大きく影響した。また厚生労働省で室内濃度指針値が策定されている化学物質の放散はいずれも少なかった。

Aldehydes and volatile organic compounds (VOCs) emitted from commercial laminated veneer lumber (LVL) were determined using the JIS small chamber method for 21 days. LVL samples were made from three different veneer species, namely larch (<I>Larix</I> spp.), radiata pine (<I>Pinus radiata</I> D. Don) and sugi (<I>Cryptomeria japonica</I> D. Don), and were bonded with phenol-formaldehyde resins for structural use and melamine-urea-formaldehyde resins for non-structural use. Effects of veneer species, adhesive type, and formaldehyde scavenger on aldehyde and VOC emissions from LVL samples were investigated. The emission factors of aldehydes, VOCs and total VOC (TVOC) decreased during the 21 days in the small chamber with only a few exceptions. The highest emission factors of formaldehyde and acetaldehyde were determined in radiata pine LVL. Adding the formaldehyde scavenger to LVL samples decreased the formaldehyde emission factors by 50% or more. The variety and amount of VOC emissions were strongly dependent on the veneer species. It was therefore concluded that the predominant VOCs derived from the veneer. All the LVL samples used in this study had very low emissions of VOCs according to the indoor air quality guidelines of the Japanese Ministry of Labor, Health and Welfare.

Journal

  • Mokuzai Gakkaishi

    Mokuzai Gakkaishi 52(2), 113-118, 2006

    The Japan Wood Research Society

Codes

  • NII Article ID (NAID)
    130004468888
  • Text Lang
    JPN
  • ISSN
    0021-4795
  • Data Source
    J-STAGE 
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