高频热压胶合中板坯内温度分布及变化趋势

doi:10.11707/j.1001-7488. 20110118

Abstract

Abstract:

In this paper, poplar were selected as the raw materials, melamine-formaldehyde resin(MF)was selected as adhesive, high-frequency hot pressing process was used to analyze the variation of temperature inside the mats for thick wood-based panels. The results showed the process of high-frequency hot pressing of the reconstituted lumber, power function was appropriated in describing the variation of temperatures inside the mats as a function of time. In length-width direction, the temperature may be different in heating process due to the moisture content. However, when the temperature surpass 100 ℃, temperature will gradually become stable. Along the direction of the thickness, the highest temperature was observed neither at the middle nor the surface layers of mats in high-frequency electric field, it occurred somewhere close to the positive plate, and the lowest temperature occurrrd near the negative plate.

Key words: poplar, melamine-formaldehyde resin(MF), high-frequency, hot pressing, temperature, power

CLC Number:

S781.65

Chen Yongping;Wang Jinlin;Li Chunsheng;Wang Jinping. Variation of Temperature inside the Mats for Wood-Based Panels by High-Frequency Hot Pressing Process[J]. Scientia Silvae Sinicae, 2011, 47(1): 113-117.

[1]	Shan Yanfei, Wang Weiyu, Xiang Weixia, Song Lili, Zhou Minyin, Chen Jiawei, Suo Jinwei, Yu Weiwu, Wu Jiasheng, Hu Yuanyuan. Effect of Retting Temperature on Transformation of Main Nutrients in Seeds of Different Torreya grandis Cultivars during After-Ripening Period [J]. Scientia Silvae Sinicae, 2019, 55(7): 46-56.
[2]	Gao Xin, Zhou Fan, Zhou Yongdong. Sorption Isotherms Characteristics of High Temperature Heat-Treated Wood [J]. Scientia Silvae Sinicae, 2019, 55(7): 119-127.
[3]	Yang Baoshi, Guo Yingkai, Pang Kangying, Chen Yingjian, Zhu Yixin. Bearing Performance of Thin-Walled Timber Composite Cee-Sections [J]. Scientia Silvae Sinicae, 2019, 55(6): 111-121.
[4]	Wu Zhilong, Zhou Chengjun, Zhou Xinnian, Liu Fuwan, Zhu Qixiong, Huang Jinyong, Chen Wen. Difference in Soil Respiration Rates of the Mixed Plantations of Cunninghamia lanceolata and Broadleaved Trees 5 Years after Harvesting at Different Intensities [J]. Scientia Silvae Sinicae, 2019, 55(6): 142-149.
[5]	Zhang Xixi, Yang Qingpeng, Liu Liang, Wang Qingtao, Li Fei, Guo Lili, Hao Lihua, Cao Xu, Fan Xiaodong, Liang Weijia, Zheng Yunpu. Effects of Girdling on Stem CO₂ Efflux and Its Temperature Sensitivity of Populus tomentosa [J]. Scientia Silvae Sinicae, 2019, 55(5): 1-10.
[6]	Liu Bao, Wang Minhuang, Yu Zaipeng, Lin Sizu, Lin Kaimin. Characterization of Soil Respiration after Conversion from Natural Forest to Plantations in Central-Subtropical Area [J]. Scientia Silvae Sinicae, 2019, 55(4): 1-12.
[7]	Shen Jingxia, Yuan Xiujin, Li Maihe, Yu Feihai, Wang Xue, Liu Lu, He Yunlong, Lei Jingpin. Effects of Soil Temperature and Moisture on Nitrogen and Phosphorus Contents in Picea balfouriana Seedlings [J]. Scientia Silvae Sinicae, 2019, 55(4): 31-41.
[8]	Ma Hongyue, Cui Hongmei, An Zhen. Low-Frequency Vibration Characteristics in the Working Process of [J]. Scientia Silvae Sinicae, 2018, 54(9): 177-190.
[9]	Liu Peng, Jia Xin, Yang Qiang, Zha Tianshan, Wang Ben, Ma Jingyong. Characterization of Soil Respiration in a Shrubland Ecosystem of Artemisia ordosica in Mu Us Desert [J]. Scientia Silvae Sinicae, 2018, 54(5): 10-17.
[10]	Wang Juan, Chen Hui. Identification and Expression of Cold Shock Domain-containing Protein Gene in Dendroctonus armandi [J]. Scientia Silvae Sinicae, 2018, 54(4): 58-66.
[11]	Lu Weiwei, Yu Xinxiao, Jia Guodong, Li Hanzhi, Liu Ziqiang. Response of Stable Carbon Isotope of Tree-Ring to Temperature and Precipitation Changes in Pinus tabulaeformis in Miyun Mountain Area [J]. Scientia Silvae Sinicae, 2018, 54(3): 1-7.
[12]	Tian Mengdi, Li Yanjie, Zhang Pingdong, Wang Jian, Hao Jingyi. Pollen Chromosome Doubling Induced by High Temperature Exposure to Produce Hybrid Triploids in Populus canescens [J]. Scientia Silvae Sinicae, 2018, 54(3): 39-47.
[13]	Li Jianqing, Mei Zengxia, Yang Zhongqi. Geostatistical Analysis on Spatial Distribution Pattern of Batocera horsfieldi (Coleoptera: Cerambycidae) Populations in Different Poplar Forest Types [J]. Scientia Silvae Sinicae, 2018, 54(3): 83-90.
[14]	Bai Xue, Fan Zexin. Response of Tree Ring Width to Climate Change of Tetracentron sinensis in Humid Evergreen Broad-Leaved Forest in the Middle Ailao Mountains [J]. Scientia Silvae Sinicae, 2018, 54(3): 161-167.
[15]	Feng Haiying, Feng Zhongke. A New Method of Valuating the Ecological Service of Temperature Regulation of Forests in Shangdon Province Based on MODIS LST Products [J]. Scientia Silvae Sinicae, 2018, 54(2): 10-17.

Variation of Temperature inside the Mats for Wood-Based Panels by High-Frequency Hot Pressing Process

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments