| 摘要: |
| 采用气候箱模拟室内环境，测试了中密度纤维板（MDF）的甲醛散发量，分析了MDF厚度和封闭方式及气候箱温度、相对湿度和空气交换率对MDF甲醛散发量的影响，探讨了MDF甲醛散发机理.结果表明： MDF甲醛散发的主要通道是板材四周端面，其甲醛初始散发量是板材上、下表面甲醛初始散发量的1倍以上；MDF越薄，其甲醛散发量越大；随着气候箱温度和相对湿度的升高，MDF甲醛散发量增大；随气候箱空气交换率提高，MDF甲醛散发量降低.MDF甲醛散发过程可分为3个阶段，即短期快速散发阶段、中期缓慢散发阶段和长期稳定散发阶段. |
| 关键词: 中密度纤维板 甲醛散发量 气候箱 脲醛树脂胶黏剂 散发机理 |
| DOI：103969/j.issn1007 9629201504026 |
| 分类号: |
| 基金项目:北京市教育委员会共建项目专项资助；浙江省共建项目（CZXC201410） |
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| Research on Characteristics of Formaldehyde Emission of |
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Medium Density Fiberboard Based on ChamberXING Feng, SONG Wei, LU Zhenyou, ZHANG Shuangbao
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Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China
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| Abstract: |
| Chamber was designed to simulate indoor environment to measure the formaldehyde emission of medium density fiberboard(MDF). The effects of thickness and sealed method of MDF, and temperature, relative humidity, air exchange rate of chamber on the formaldehyde emission of MDF were investigated. The mechanism of formaldehyde emission of MDF was discussed. Results show that formaldehyde emits from the edge of MDF mainly, the initial formaldehyde emission is nearly 1 times of that from the surface of MDF. Thinner MDF has greater formaldehyde emission. With the increase of temperature and relative humidity of chamber, the formaldehyde emission of MDF is increased. With the rise of air exchange rate of chamber, the formaldehyde emission of MDF is diminished. The process of formaldehyde emission of MDF consists of three major stages, i. e., fast emission in short term, slow emission in mid term and stable emission in long term. |
| Key words: medium density fiberboard(MDF) formaldehyde emission chamber urea formaldehyde resin adhesive diffusion mechanism |
