浅议活底料仓的改造

针对活底料仓在运行过程中出现的问题,通过受力计算分析其原因,并进行相应的改造。     

中密度纤维板组合施胶系统技术探讨

详细地介绍了中密度纤维板干燥前与干燥后组合施胶系统技术原理、技术优势及其在生产线上的实际应用,详细地分析了应用过程存在的主要问题及其产生原因,并对其后续使用提出了建议.     

乙酰丙酮分光光度法测定纤维板甲醛释放量的不确定度评定

文章依据GB／T17657—1999对用于测定纤维板中有害物质甲醛的乙酰丙酮分光光度法的不确定度进行了研究。建立了数学模型,详细分析了测定过程中影响结果的各个分量,并对各不确定度分量进行评定,计算出了该法的合成不确定度和扩展不确定度。     

环保型果糖/尿素树脂的合成及应用

为了降低传统脲醛树脂中甲醛的危害,采用了果糖代替甲醛与尿素合成了环保型果糖/尿素树脂,并用合成出的树脂与芦苇纤维复合制备了芦苇纤维板,考察了树脂合成过程中果糖/尿素物质的量之比、反应温度、反应时间、催化剂种类等工艺参数对树脂及芦苇纤维板性能的影响,得到了果糖/尿素树脂的最佳合成工艺,即果糖/尿素/催化剂盐酸的物质的量之比为2.5/1/0.13、反应温度为91℃、反应时间为3 h。在此最佳合成工艺下合成的树脂固含量为65.57%、黏度为73 m Pa·s,由此树脂制备的芦苇纤维板的静曲强度为26.19 MPa,弹性模量为6.13 GPa,完全满足国家标准GB/T 11718–2009的要求。     

木灰比对水泥纤维板吸声性能与导热性能的影响

随着社会的发展,人们生活质量的不断提高,对居住声环境及保温要求也越来越高,因此改善声环境、提高居住的保温性能越来越引起大家的重视。本文研究植物纤维/水泥比(木灰比)对于水泥纤维板吸声系数和导热系数的影响。研究发现,水泥纤维板的导热系数随木灰比的增大而逐渐减小;水泥纤维板的吸声系数基本接近于1,随木灰比的变化对其影响不大,吸声性能好。     

中密度纤维板生产减排技术研究与应用

对中型中密度纤维板生产中造成环境污染的污染源、污染因子进行了分析研究,根据同类企业实际运行情况提出了治理途径和解决措施。     

Termite Resistance of MDF Panels Treated with Various Boron Compounds

In this study, the effects of various boron compounds on the termite resistance of MDF panels were evaluated. Either borax (BX), boric acid (BA), zinc borate (ZB), or sodium perborate tetrahydrate (SPT) were added to urea-formaldehyde (UF) resin at target contents of 1%, 1.5%, 2% and 2.5% based on dry fiber weight. The panels were then manufactured using 12% urea-formaldehyde resin and 1% NH₄Cl. MDF samples from the panels were tested against the subterranean termites, Coptotermes formosanus Shiraki. Laboratory termite resistance tests showed that all samples containing boron compounds had greater resistance against termite attack compared to untreated MDF samples. At the second and third weeks of exposure, nearly 100% termite mortalities were recorded in all boron compound treated samples. The highest termite mortalities were determined in the samples with either BA or BX. Also, it was found that SPT showed notable performance on the termite mortality. As chemical loadings increased, termite mortalities increased, and at the same time the weight losses of the samples decreased.     

我国中密度纤维板压机发展概况

简要介绍了我国中密度纤维板压机的发展,并对中密度纤维板多层压机结构与使用、连续压机的优点等进行了讨论。     

Preliminary Study on Chicken Feather Protein–Based Wood Adhesives

Abstract

The objective of this preliminary study was to partially replace phenol in the synthesis of phenol-formaldehyde resin with feather protein. Feather protein–based resins, which contained one part feather protein and two parts phenol, were formulated under the conditions of two feather protein hydrolysis methods (with and without presence of phenol during hydrolysis), two formaldehyde/phenol molar ratios (1.8 and 2.0), and three pH levels (9.5, 10.5, and 11.5). Southern pine fiberboard bonded with feather protein–based resins was fabricated and bending strength, bending stiffness, internal bonding strength, and percent thickness swell were evaluated. Results indicated that the test parameters all significantly affected resin quality. The resin formulated with feather protein hydrolyzed in the presence of phenol, using a F/P ratio of 2.0, and at a pH of 10.5 performed as well as the neat PF resin. Based on our findings, feather protein is a potential cost-effective material for the production of PF-type adhesive resins.