刨花板生产废料的利用途径

根据1993年生效的《废料管理技术细则》要求：12年内逐步禁止废弃有机物含量超过5％的废料。随着人造板工业的日益发展，刨花板的生产过程中产生的有机废料也越来越多，已经成为当前污染环境的一大难题，因此，如何处理这些有机废料，净化环境，又能有效利用，使其有较大增值，就成为当前国内外有关厂家及科研院所的一项重要课题。笔者工作在基层刨花板企业，也曾就这一问题进行过一些研究和探讨，并取得了一定成果。今结合有关参考资料，就其工艺和经济可行性进行综合阐述，供大家参考。1废料的产生与分析根据一般刨花板生产线的工艺流程和…     

水泥刨花板砂光粉尘回收的研究

1试验材料与方法1·1试验材料杨木刨花:长10~30 mm,宽1~6 mm,厚0·2~0·4 mm。先用旋切机将杨木段旋出0·2~0·4 mm厚的单板带,然后用锤式再碎机进行宽度方向的加工,最后筛选成所需的规格刨花[1]。水泥:32·5级普通硅酸盐水泥。添加剂:氯化钙(CaCl2),纯度96%;硅酸钠(Na2SiO3)为     

聚氯乙烯废料的含量对复合刨花板性能的影响

本研究主要是探求聚氯乙烯废料在复合刨花板中的不同加入量对刨花板物理力学性能的影响。结果表明：随着聚氯乙烯废料加入量的增加,复合刨花板的静曲强度,弹性模量以及内结合强度均降低;吸水厚度膨胀率减小;但振动阻尼系数增大;表面粗糙度也产生一定的变化。在多数情况下板材的物理力学性能可以达到日本ＪＩＳ Ａ ５９０８刨花板标准的要求,这说明在板中加入适量的聚氯乙烯废料可以生产出具有优良性能的刨花板。     

水泥刨花板快速固化工艺的研究

以毛白杨、兴安落叶松和普通硅酸盐水泥为主要原料，采用二氧化碳气体喷射法研究水泥刨花板的快速固化工艺，探讨了水灰比、二氧化碳气体压力，养护条件等对水泥反应特征和水泥刨花板性能的影响。结果表明，最佳制板工艺参数为：ＣＯ２气体压力０．７ＭＰａ，通气时间３ｍｉｎ，木灰比０．２（毛白杨）或０．５（落叶松），水灰比０．３５（毛白杨）或０．４（落叶松）；水灰比不但影响成板的可能性，而且对反应特征和水泥刨花板的力     

水泥刨花板生产与研究进展

一、引言水泥刨花板是以木质刨花或纤维与水泥为主要原料制成的一种人造板。它兼有木材和水泥的双重性能,与普通的建筑材料相比,具有重量轻、强度大、安裝组合方便以及耐侯、耐潮湿、耐火、耐菌虫、绝缘和机械加工性能好等特点,是良好的工程     

热压水泥刨花板工艺的研究

本文主要论述了热压法制造水泥刨花板的工艺。试验选取热压温度、热压时间、水灰比、灰木比、添加剂和板子密度等工艺变量建立多元回归方程,并对刨花形态等问题进行了讨论。试验结果表明:热压温度和刨花形态对板子性能影响极为显著;热压法水泥刨花板不仅具有与冷压法相同的物理力学性能,而且还具有水泥水化速度快、板坯脱模强度较高等特点,因而缩短了水泥刨花板的生产过。     

柠檬桉水泥刨花板若干工艺因子的研究

通过对柠檬桉制造水泥刨花板的可能性、水泥/刨花的比率、水泥种类与板材性能关系等因素的研究,结果表明:使用添加剂或对木材进行热水处理可以使柠檬桉成为适宜制造水泥刨花板的树种。     

水泥刨花板的现状及应用

论述了国内外水泥刨花板的发展概况，分析了水泥刨花板的应用特点。     

杨木水泥刨花板工艺的研究

对杨木水泥刨花板的物理力学性能与主要工艺参数——密度、木灰比、水灰比、添加剂及添加量的关系作了研究。结果表明,密度(D)对板材性能影响最大,木灰比(W/C)次之,水灰比(W_1/C)最小;板材的主要性能如MOR、MOE、IB同密度、木灰比、水灰比的关系,可用方程Y=a_0+a_1D+a_2(W/C)+a_3(W/C)~2+a_4(W_1/C)+a_5(W_1/C)~2表示;在各种添加剂中,以氯化钙的效果最好。     

Preparation and properties of waste tea leaves particleboard

Urea-formaldehyde (UF) adhesive is the main source of formaldehyde emission from UF-bonded boards. The components in waste tea leaves can react with formaldehyde to serve as a raw material in the production of low formaldehyde emission boards. In our study, waste tea leaves and UF adhesive were employed in the preparation of waste tea leaves particleboard (WTLB). An orthogonal experimental method was applied to investigate the effects of process parameters on formaldehyde emission and mechanical properties of WTLB. The results indicated that: 1) waste tea leaves had the ability to abate formaldehyde emission from boards; and 2) density of the WTLB was a significant factor affecting its modulus of rupture (MOR), modulus of elasticity (MOE) and internal bonding (IB).     

Improvement on the properties of gypsum particleboard by adding cement

Gypsum particleboard (GPB) has high thickness swelling (TS), high water absorption (WA), and low mechanical properties compared with cement-bonded particleboard. The properties of GPB were improved by adding cement. The experimental results showed that GPB with the added cement had good physical and mechanical properties compared with those of gypsum particleboard with no added cement. The TS and WA of gypsum particleboard with added cement were reduced by 10%. The mechanical properties of GPB, such as internal bond strength (IB), modulus of rupture (MOR), and modulus of elasticity (MOE), increased when the GPB was made with added cement. The properties of GPB improved relative to the quantity of cement added. With an increase of cement content from 5% to 10%, the TS and WA were reduced, and the IB, MOR, and MOE were increased. In contrast, the TS and WA increased and the IB, MOE, and MOR decreased when the cement content was increased from 15% to 30%. Thus the physical and mechanical properties of GPB were successfully improved when the added cement content was 10%.An outline of this paper was presented at the 47th Annual Meeting of the Japan Wood Research Society in Kochi, April 1997     

废旧刨花板循环利用技术的研究

探讨利用废旧刨花板循环制造刨花板的技术.采用高压水煮、水煮、汽蒸和直接粉碎4种方法制备刨花,通过比较刨花的筛分值和压制刨花板的主要物理力学性能,得出最佳的处理方法为水煮.试验压制的一次循环水煮和二次循环水煮刨花板的性能,可分别达到GB/T 4897.5-2003和GB/T 4897.3-2003的要求.     

提高石膏刨花板耐老化性能的进一步研究

本文研究了矿渣硅酸盐水泥对石膏水化性能的影响;水泥加入量与石膏硬化浆体力学强度的关系;石膏中掺入3～12%的矿渣硅酸盐水泥时,对石膏刨花板静曲强度和耐水性能的影响;石膏刨花板表面涂建筑涂料后,对其耐老化性、耐水性以及静曲强度的影响。     

刨花板表面粉末涂饰初探

采用砂光、涂白胶和涂导电漆等不同表面处理方式处理刨花板基材,综合考虑上粉量及涂膜性能,获得刨花板基材表面处理的较佳方法.试验表明,刨花板表面处理较佳方式是涂导电漆,其次是砂光处理,最后是涂白胶.涂导电漆处理的刨花板基材,粉末涂饰的固化条件为160 ℃下烘干10 min.固化后的粉末涂层性能为:涂膜附着力1级,硬度4H,具有较好的耐水性.     

阻燃刨花板阻燃剂的研制

以氨基树脂为载体,磷-氮系阻燃液与固体无机耐火剂所构成的刨花板用阻燃体系,采用阻燃剂与刨花直接混合的添加工艺,不会造成阻燃剂的浪费,不污染环境。所生产的阻燃刨花板主要物理力学性能达到国家标准。阻燃性能:氧指数40%～50%.1000℃火焰穿透时间15～25分钟,发烟等级为一级。对人低毒。     

The lamination influence on properties of agro-based particleboard

Abstract

Response surface methodology (RSM) based on a three-level, three-variable central composite rotatable design was applied to evaluate the effects of the parameters such as ratio of rice straw (Oryza sativa)/poplar (Populus deltoids) wood particle bonded with urea-formaldehyde resin in panels, species of wood veneer coating these panels and amount of adhesive in glue line on the modulus of rupture (MOR), internal bonding (IB), and thickness swelling (TS) of panels. Mathematical model equations were derived by computer simulation programming to optimize the properties of the particleboard. These equations that are second-order response functions representing MOR, IB, and TS were expressed as functions of three operating parameters of panel properties. Predicted values were found to be in a good agreement with experimental values (R ² values of 0.96, 0.98 and 0.98 for MOR, IB, and TS, respectively). This study has shown that the RSM could efficiently be applied for modeling panel properties. It was found that the variables affected the properties of panels. Straw usage up to 30% in the mixture did not cause a significant decrease in MOR, IB, and TS. Using beech veneer and 190 g/m² glue line had the highest MOR and lowest TS.     

石膏刨花板生产的工艺设计

由联邦德国科技部(BMFT)资助中国的项目“利用木质纤维生产人造板”,是由联邦德国弗劳霍夫木材研究所(WKI)和中国林科院木材工业研究所(CRIWI)承担。现进行了半干法生产石膏刨花板的工艺设计。为了确认原材料的适用性,中国派遣一名科技人员在WKI用中国原材料进行了试验。根据当地实际情况确定该厂的年生产能力。全部生产设备可分成热能生产、石膏煅烧和板生产三部分。