摘要
根据稻壳的化学组成和结构特点,采用稻壳板专用的DN—8号低毒脲醛胶,通过正交试验和单因子试验,筛选出了最佳制板工艺条件:稻壳含水率为2.6％—4.2％;稻壳筛分值10—14网目占24％—27％,20网目占49％—54％,40—60网目占20％—23％;施胶量为12％;增强剂(改性剂)为1.16％;固化剂为5％;热压温度为150℃;热压时间为0.416min/mm;热压单位压力为2.5 MPa,在此条件下制造的稻壳板密度为0.8—0.83 g/cm^3;含水率为4.1％—5.4％;吸水厚度膨胀率为0.86％—0.89％;平面抗拉强度为0.44—0.66 MPa;静曲强度为15.75—17.60 MPa,已达到GB4896—4905—85刨花板标准。
According to the chemical composition and the structural characteristics of rice husk, this paper chooses out the optimum board-making technology conditions of hull board from the orthogonality experiment and the single-factor experiment in DN-8 low poisonous urea-formaldehyde glue for the special use of hull board; that is,the moisture content of rice husk is from 2.6％ to 4.2％; mesh 10-14 of hull screening value takes amount of from 24％ to 27％, mesh 20 from 49％ to 54％, and mesh 40-60 from 20％ to 23％; the applying amount of glue is 12％, reinforcing agent 1.16％, and solidifing agent 5％; the temperature and time of hot pressing is 150℃ and 0.416 min/mm respectively, and the intensity 2.5 MPa.The density of the hull board made under the above conditions is from 0.8 g/cm to 0.83 g/cm, the mositure content from 4.1％ to 5.4％, the thickness dilatation rate of mositure absorption from 0.86％ to 0.89％, the plane tensile strength from 0.44 MPa to 0.66 MPa, and the static bend strength from 15.75 MPa to 17.60 MPa. Therefore, this hull board reaches the standard of GB4896-4905-85 shaving board.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1992年第5期49-54,共6页
Journal of Northeast Forestry University
关键词
稻壳板
制造
工艺
物理力学性能
Hull board
Process technology
Physical and mechanical properties
