关于发展中密度纤维板二次加工的一些看法

改革开放以来，我国的中密度纤维板（简称MDF）生产得以迅猛发展。这种发展势态在一定程度上说明了国人对MDF有了更深的了解，同时也表明市场对MDF有一定的需求。另外福州人造板厂的MDF生产带来的经济效益也产生了很大的影响，很多企业纷纷效仿企求获得同样的经济效益。但是与MDF并存的人造板产品，如胶合板、刨花板、走向刨花板、竹材胶合板等产量也在不断地增加，MDF除生产企业之间的竞争之外，其厚板将与厚胶合板、刨花板、定向刨花板、竹胶合板争夺市场，其薄板将与硬质纤维板、薄胶合板、薄型刨花板争夺市场。可以想象二、三年…     

国产中密度纤维板设备可行性分析

我国自1974年开始中密度纤维板(MDF)生产的试验,80年代初引进了一批中密度纤维板(MDF)生产线。现在我国的中密度纤维板年生产能力已达26.5万m~3,并以每年10％以上的递增量增长,加上即将投产的中密度厂家,我国的MDF生产能力已达30万m~3。我国2000年规划MDF年产量要达到50万m~3,平均每年增加2.2万m~3,如果以年产1.5万m~3生产线计算,需要上14套,如     

干法生产中密度纤维板废水处理初探

中密度纤维板(MDF),六十年代中期首创于美国,产品表面光滑.内部结构均匀,便于机械加工和二次贴面,质量好,用途广.我国MDF八十年代初开始起步,到目前年产量已达200万m~3.中密度纤维板采用干法生产工艺,同湿法生产工艺比较,生产用水减少95%以上,但也存在废水处理问题.本文结合沪州巨森公司年产3万m~3中密度纤维板工程的废水处理作一探讨.1中密度纤维板生产过程中的废水来源、水量、水质及特点.1.1废水来源MDF工艺流程如下:木材→剥皮→木片料仓→筛选→热磨系统→干燥→辅装→热压     

国内外发展中密度纤维板概况

1 国外中密度纤维板(MDF)生产现状和发展趋势 1.1 概况 1966年美国建成世界上第一个中密度纤维板(Medium Density Fibreboard,简称MDF)厂以来,至今世界上已建成MDF厂73个,年生产能力为604.15万m~3。MDF具有高强度、质轻、变形小、表面光滑、便于二次加工、机械加工性能良好等特点,已被世人所认识和承认。它是举世公认的最佳人造板品种之一。1980～1991,10年期间,MDF生产发展迅猛,特别是欧洲,无论是发展速度,生产能力,都远远超出它的诞生地—北美     

活性碳纤维增强中密度纤维板力学性能的研究

研究了聚丙烯腈基活性碳纤维(PAN-ACF)对中密度纤维板(MDF)力学性能的影响,通过对比测试添加PAN-ACF中密度纤维板的静曲强度和内结合强度,得出聚丙烯腈基活性碳纤维对中密度纤维板性能的影响。     

铝箔贴面中密度纤维板的阻燃性能评价

为拓展中密度纤维板(MDF)的应用领域,在其表面贴覆铝箔,制备铝箔贴面中密度纤维.贴面MDF阻燃性能的检测结果表明:其阻燃性能较MDF素板有明显提高.     

氧化铝添加量对地采暖强化木地板基材性能的影响

为提高强化木地板基材的导热性能,选择氧化铝作为改性填料,用于强化木地板基材中密度纤维板(MDF)的制造,并检测其性能。结果表明,加入氧化铝后MDF的导热性能明显改善;在氧化铝添加量12%时,按常规工艺生产的MDF,性能达到LY/T 1611-2011《地板基材用中密度纤维板》的要求,可用作地采暖强化木地板的基材。     

湿法中密度纤维板生产工艺初探

1概述鞍山刨花板厂于1991年通过对现有湿法纤维板设备的改造，设计出既能生产普通硬质纤维板又能生产湿法中密度纤维板的多功能生产线．由于湿法生产中密度纤维板工艺还在研究和发展阶段，所以本文着重探讨湿法中密度纤维板的设计方案和生产工艺。湿法中密度纤维板（简称MDF）生产工艺是基于利用木材或其它植物纤维原料中的木责成份在高温下塑化融溶将本纤维等组份自身地合，利用纤维素、半维素中所含的羟基形成氢键结合力，利用少量的热固性木材胶粘剂，进一步形成化学结合力，从而牢固地把木纤维胶合成一体。因此，它可以通过湿法成型，…     

有机膨胀型阻燃剂在桉树中纤板中的应用

桉树人工林木材已成为我国南方中密度纤维板(MDF)生产的主要原料之一,为进一步拓宽桉树MDF的应用领域和利用价值,自行研发了一种有机型阻燃剂并用于阻燃桉树MDF的生产.通过对板材阻燃性能和主要力学强度指标的测试,结果表明,阻燃桉树MDF达到难燃材料的标准要求,主要力学强度指标达到国标GB/T11718-2009的要求.     

工艺因素对中密度纤维板（MDF）板性的影响

MDF主要物理性能如：密度与剖面密度梯度、吸湿（水）性与尺寸稳定性等都直接影响到MDF的应用，而这些性能主要取决于制板时相关工艺因素和参数的制定。因此，研究物理性能与工艺之间的关系，对MDF的生产非常重要。合理选择工艺参数是改善MDF性能的重要手段。1密度与剖面密度梯度纤维板按密度分为三类：高密度（≥800kg／m3）、中密度（500～800kg／m3）、低密度（＜500kg／m3）。纤维板的密度影响其所有物理力学性能及机械加工性能，因此，它是纤维板的主要指标之一。人们喜欢密度低、强度高、加工性能又好的纤维板，MDF的性能与这种…     

中密度纤维板热压中VDP影响因素的控制系统研究

中密度纤维板的剖面密度形成于热压过程,影响剖面密度的热压温度、热压压力、压机速度以及压板间距和板坯含水率,也是连续热压控制过程中的主要控制对象.本文通过不同的检测手段对其影响因素进行检测,建立以PLC为控制核心的MDF连续热压控制系统.并对热压温度参数、热压压力参数进行模糊PID控制,从而有效地生产出符合要求的高质量中密度纤维板.     

Effect of thermo-mechanical refining on properties of MDF made from black spruce bark

The effects of thermo-mechanical refining conditions on the properties of medium density fiberboard (MDF) made from black spruce (Picea mariana) bark were evaluated. The bark chips were refined in the MDF pilot plant of Forintek Canada Corporation under nine different refining conditions in which preheating retention time was adjusted from 3 to 5 to 7 min and steam pressure was set at either 0.6, 0.9 or 1.2 MPa. The resulting bark fibers were blended with 12% UF resin (based on oven-dry fiber weight) using a mechanical blender. The resinated fibers were manually formed into fiber mats and hot-pressed into MDF panels using consistent parameters. Two panels for each refining condition were produced, resulting in a total of 18 panels. Analysis of variance (ANOVA) was used to analyze the significance of factors. Regression coefficients and 3D contour plots were used to quantify the relationship between panel properties and the two test factors. The results from this study indicated that the preheating retention time was a significant factor for both modulus of rupture (MOR) and modulus of elasticity (MOE), the steam pressure was a significant factor for internal bond strength (IB), MOR and MOE, whereas both factors were insignificant for thickness swelling, water absorption and linear expansion. The properties of MDF panels were quadratic functions of retention time and steam pressure. Compared to the ANSI standard for 120-grade MDF, most panels with a nominal density of 950 kg/m³ had very high IB (>1 MPa) and acceptable MOR, MOE and dimension stabilities. These results suggest that black spruce bark residues can be considered as a potentially suitable raw material for manufacturing MDF products.     

A multiple criteria analysis of factors affecting markets of engineered wood products with respect to customer preferences: a case study of particleboard and MDF

Of considerable importance and a principal goal in business is the creation of customer satisfaction. Evalu- ation of end user preferences for producers of particleboard and medium density fiberboard (MDF) requires indices for the assessment of markets and modification of product quality. However, only sporadic research has been carried out in this field. Therefore, the goal of this survey was to identify indices with respect to the points of view of: 1) consumers in order to select particleboard and MDF, 2) suppliers in order to consider production strategies, improve product quality, improve competitive ability of domestic producers in the market and help industry to be more customer oriented. This survey consisted of two stages. In the first stage, factors affecting customer preferences in the selection of particleboard and MDF were determined using a Delphi method, with the help of experts and a group of principal users of these prod- ucts. Then these factors were categorized in three groups: qualitative, technical and technological and marketing factors. Furthermore, questionnaires were prepared and distributed among consumers and responses evaluated and weighted by using an analytic hierarchy process (AHP) using expert choice software. Our results show that at both stages, the consistency ratio was less than 0.1, indicating that all results and judgments were stable and acceptable. The results obtained from questionnaires about particleboard rank the priorities for factors in the selection by consumers as follows: nail and screw holding ability, homogeneity in structure, edge strength of panel, durability and bending strength. The most important factors for MDF were machinability of panels, homogeneity in structure, nail and screw holding ability, edge strength of panel, durability and bending strength.     

防霉中密度纤维板的研制

在湿度较大的地区和潮湿的场所,中密度纤维板(下称中纤板)因长期受潮而产生霉变,使其性能受损,更为严重的是污染了居住环境。因此,研究如何防止中纤板霉变,使其具有防霉性能应作为一项重要的课题。笔者通过对防霉剂选择、优化热压工艺参数、防霉效果测试等方面进行了试验研究,确定了适当的防霉剂及其添加量,得出了压制防霉中纤板的优化热压工艺。     

中纤板板坯铺装质量控制的因素分析

结合实例，本文介绍了中纤板铺装机的结构和工作原理，分析了影响板坯铺质量的因素，对如何有效控制板坯的铺装质量进行了探讨。     

枣椰树叶中脉人造板的研制与开发

介绍开发利用枣椰树叶的必要性和可行性，工业性试验表明枣椰树叶中脉ＭＤＦ以及枣椰树叶中脉与木质混合ＭＤＦ，其主要物理力学性能不亚于木质ＭＤＦ。目前国内完全可以提供成套的枣椰树叶中脉ＭＤＦ制造设备，这不仅可以使国产人造板生产线进入国际市场，且为我国南方地区开发利用枣椰树叶制造人造板创造了条件，拓宽了人造板生产的原料来源。     

国产中纤板成套设备现状、发展趋势及对策

在介绍国产MDF设备概况的基础上,重点介绍了上海人造板机器有限公司MDF成套设备现状,并探讨向大型化、高速化、自动化以及扩大原材料范围,提高产品质量等方向发展趋势所采取的对策。     

Sesbania aegyptiaca as promising biomass for manufacturing of MDF

Sesbania fiber is a fast-growing wood species that has been investigated for medium-density fiberboard (MDF) production. To assess the possibility of applying the local industrial defibration parameters of sugar-cane bagasse (SCB) on defibration of sesbania, the chemical constituents of unfibrated and defibrated sesbania, as well as their thermal stability and scanning electron micrographs, were estimated. Different preparation variables of MDF, such as density, level of urea-formaldehyde (UF) resin (with 0.19% free-formaldehyde [HCHO]), and pressing time were studied, in comparison with that produced by using SCB fibers. The results showed that most of the tested sesbania-based MDFs have mechanical properties that fulfill the minimum requirements of MDF ANSI standard. Additionally, applying 12% UF and pressing for 240 sec provided sesbania-based MDF with optimum reduction in thickness swelling (reached ～7%). It is important to note that the sesbania-based MDF produced under these conditions is characterized by a lower TS property, than that obtained from SCB, or that reported in standards. The preliminary feasibility study revealed that using sesbania fibers will be an added economical potential for MDF production.     

刨切薄竹贴面中密度纤维板工艺研究

对刨切薄竹贴面中密度纤维板(MDF)的工艺进行了研究,结果表明:在MDF的上下表面直接粘贴刨切薄竹的工艺可行,并根据试验结果确定了较优的贴面工艺参数.测试结果还显示,刨切薄竹背衬无纺布后再与MDF胶合,其表面胶合强度比刨切薄竹直接贴面MDF时低.     

湿地松制造中密度纤维板工艺的研究

以湿地松（Ｐｉｎｕｓｅｌｉｏｔｉ）为原料制造中密度纤维板工艺的研究,采用正交试验方法,分析了施胶量、板坯含水率、热压温度及热压时间对中密度纤维板物理力学性能的影响。试验结果表明：板坯含水率及热压时间对试验板质量影响较大,热压温度及施胶量的影响较小。采用适宜的工艺,即板坯含水率在１０％、热压温度１６５℃、热压时间５ｍｉｎ,施胶量可以降至８％～９％,试验板的各项物理力学性能可以达到国标特级品的要求。