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Retardant Poplar Veneer and Plywood Sorption

Author: HaoHuiLing
Tutor: YuZhiMing
School: Beijing Forestry University
Course: Wood Science and Technology
Keywords: Poplar veneer BL green flame retardant Fire retardant plywood Hygroscopic Oxygen Index
CLC: TS653
Type: Master's thesis
Year: 2011
Downloads: 52
Quote: 0
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Abstract


The physical and chemical properties of the flame retardant poplar veneer and plywood , although the play retardant effect , but would plate negative impact , this study is excellent for flame retardant performance and shortcomings Department to conduct in-depth study . The paper by the experimental study of fire-retardant treated veneers drug loading , moisture absorption, dimensional stability , veneer wood color , scanning electron microscopy and Fourier transform infrared spectroscopy , flame retardant poplar veneer of physical and chemical properties of the impact of law and reason . Retardant Plywood Production explore the use of orthogonal experiment , draw the better technology , and compare the performance before and after the fire retardant plywood moisture , the main conclusions are as follows : ( 1 ) single- board drug-loaded the amount by the impact of flame retardant concentration and immersion temperature veneer , and respectively with the two factors elevated elevated . (2) under the same ambient humidity , fire-retardant treated the wood moisture absorption rate and the size of the rate of change of the veneer was significantly higher than the untreated wood . The same humidity , the higher the higher the concentration of the flame-retardant the veneer moisture absorption rate , the boards of the same concentration in different humidity , the higher the humidity , the higher the moisture absorption rate . Flame retardant the veneer moisture absorption after size variation : Thickness gt; Length . Color on the wood flame retardant and moisture treatment , material yellow discoloration dimmed. The veneer treated by the flame retardant , the conduit line attached to a number of small transparent particles are mainly distributed in the surface and the end face of the veneer ; at 1741.59 cm-1 in the IR spectrum of the wave number , and with the increase in the flame retardant concentration here absorption peak decreases . ( 3 ) BL environmentally friendly flame the manufacture of fire-retardant plywood , veneer impregnation process : flame retardants concentration of 40 %, the dipping temperature 60 ° C , dipping time 60min . The hot-pressing process : hot pressing temperature 130 ℃, hot pressing pressure 1.2MPa, hot pressing time 45s/mm . Use this process to suppress the fire-retardant plywood detecting oxygen index of 63.2% , formaldehyde emission only 0.10mg / L , the bonding strength of 1.20MPa , the water content was 7.3% , four indicators are in line with the requirements of the national standards . (4) fire-retardant plywood moisture treatment , with the ambient humidity increases , the oxygen index relatively lower formaldehyde emission did not change significantly , the bonding strength is significantly reduced .

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CLC: > Industrial Technology > Light industry,handicrafts > Wood processing industry,furniture manufacturing industry > Processing > Wood-based panel production
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