竹碎料板用低毒脲醛树脂的合成工艺研究

在脲醛树脂(UF)的制备过程中,采用三聚氰胺对UF进行改性,制得低毒UF。结果表明:该低毒UF的固含量为49.88%,游离甲醛释放量仅为0.2026%;采用这种低毒UF胶粘剂压制的竹碎料板,其静曲强度为22.6MPa,弹性模量为2056MPa,内结合强度为0.58MPa,2h吸水厚度膨胀率为2.57%;该低毒UF是一种综合性能良好的木材用胶粘剂,其应用前景非常广阔。     

刨花板生产线的刨花计量与控制技术

与国外同类人造板生产线相比,我国的调供胶技术相对落后,未能很好地解决刨花与胶量定量配比施胶问题.本文通过对刨花体积计量和重量计量不同方案的结构、控制、特点及应用情况的详细分析和比较,提出了选用刨花计量与控制方案的建议.     

刨花板生产施胶工艺研究现状与发展

简要介绍了国内外刨花板生产中施胶工艺的相关研究工作,提出了目前存在的问题和发展趋势.     

Surface temperature of decomposing construction materials studied by laser‐induced phosphorescence

Measurements of surface temperature and mass loss of decomposing construction materials during rapid pyrolysis are presented. Experiments have been performed with samples of low‐density fiberboard, medium‐density fiberboard, particleboard and poly(methyl methacrylate) in a single particle reactor at temperatures between 300° and 600°C. Ultraviolet laser light was used to excite micrometer‐sized thermographic phosphor particles that were deposited on the investigated materials, and the temperature was obtained from temporally resolved measurements of the laser‐induced emission. The wood‐based materials show a similar behavior, with small differences being attributed to differences in material properties. The surface temperature rapidly increases to about 400°C when a particle is introduced to the hot reactor. The initial phase is followed by rapid decomposition during which the surface temperature is 380°–540°C. The heating rate is slowed down during the rapid pyrolysis, and again increases as the remaining char is heated to the reactor temperature. The poly (methyl methacrylate), however, melts and at high temperatures can be characterized as a liquid with a boiling point of about 400°C. Thermographic phosphors are concluded to be suitable for high precision remote measurements of the surface temperature of decomposing construction materials, and possibilities for further studies and developments of the technique are discussed. Copyright © 2004 John Wiley & Sons, Ltd.     

E0级环保刨花板生产系统解决方案初探

介绍采用E0级刨花板生产系统解决方案生产E0级环保刨花板。     

阻燃处理刨花板的热释放性能研究

介绍磷氮复合阻燃剂处理刨花板的阻燃机理与生产技术,应用热释放率测定技术,获得阻燃刨花板在试验状态下燃烧过程中吸热与放热过程定量分析图谱,分析研究阻燃处理刨花板的热释放性能,评定磷氮复合阻燃剂与阻燃处理刨花板的阻燃效果。     

缩短酚醛胶刨花板热压时间的方法

对缩短酚醛胶刨花板热压时间的方法进行了综述,提出了缩短酚醛胶刨花板热压时间的措施。     

摩尔比对脲醛树脂胶和刨花板性能影响的研究

本文探讨了脲醛树脂胶中甲醛与尿素摩尔比(F/U)对胶粘剂和刨花板性能的影响,从而优选出生产E1级刨花板所用的胶粘剂。     

降低刨花板生产施胶量技术

介绍了刨花板生产中施胶量的主要影响因子。通过对施胶方式、拌胶方式和碎料计量方式对施胶量的影响关系及相关设备的研究,提出降低刨花板生产施胶量的途径和方法。     

木塑复合刨花板制造技术及其应用

从环境安全型人造板产品的市场需求及废弃塑料膜资源化利用的角度,阐述了木塑复合刨花板制造技术开发的必要性和意义;介绍了木塑复合刨花板的基本制造工艺流程、胶合特点及技术关键。木塑复合刨花板耐水性好、力学性能好,且不使用含醛胶黏剂,可用于制造环境安全性好且防水性要求高的家具、橱柜、地板和复合门等,具有非常好的应用前景。