中纤板浸渍纸装饰表面缺陷浅析

在我国，ＭＤＦ主要以素板形式销售，使得同类同档次的ＭＤＦ产品相对过剩。这个现实与市场需求的共同结果要求抓紧开发发展ＭＤＦ深加工产业，满足市场对人造板的不同要求。国际上，人造板深加工最常见的是装饰纸贴面。如饰面刨花板制造家具，饰面ＭＤＦ制造强化木地板等。强化木地板以其高耐磨、耐划痕、抗冲击、耐污染、高硬度、不易变形、耐香烟灼烧等特点得到市场的青睐。强化木地板由ＭＤＦ基材短周期压贴浸渍纸，裁切铣边而成。短周期压贴工艺对强化木地板的质量影响明显。笔者根据掌握的有关资料及实验数据，就昆明红塔木业有限公司…     

中密度纤维板的过去、现在和未来

８０年代以来，ＭＤＦ是各种人造板中发展最迅速的产品，受到广泛的关注。本文介绍了自１９６６年世界上第一条ＭＤＦ生产线在美国建成至今ＭＤＦ的发展史，分析了世界森林资源的变化，人类环境保护意识的增强及技术的进步等因素对ＭＤＦ发展的推动作用。指出在新建ＭＤＦ厂时必须考虑的市场，原料、设备与技术的选择及资金等因素。介绍了我国ＭＤＦ的科研设计和生产发展情况。     

中（高）密度纤维板的近期市场分析与预测

干法中密度纤维板（以下简称ＭＤＦ）自６０年代中期问世以来，因其质地细密、结构均匀、力学性能好以及加工性能优异等特点，已经成为人造板家族中一个前景看好的重要板种。干法高密度硬质纤维板（以下简称ＨＤＦ）是近几年来随着复合地板市场及室内装修、装饰材料市场的快速增长而兴起的新板种，尤其是强化复合地板对薄板型ＨＤＦ的需求迅猛增长，使ＨＤＦ也成为人造板市场中前景很好的板种之一。１ 我国中密度纤维板的现状 我国对ＭＤＦ的研制工作起步于７０年代，并在８０年代初由黑龙江省林业设计研究院设计建成我国第一条ＭＤＦ生产线…     

沙柳中密度纤维板的研制和开发

沙柳是广泛生长在沙漠地区的一种灌丛植物，属阔叶散孔材，它具有很好的固沙、耐寒、耐旱、耐高温、耐沙埋、易种植、生长快等特性，是“三北”（指西北、华北、东北）防护林的主要速生树种。众所周知，沙柳需要三年平茬一次，且只有平茬后才可茂盛生长，而每年平茬可得的大量沙柳灌村却几乎得不到利用，损失浪费严重，因此合理开发利用沙柳资源已越来越引起人们的普遍重视。 １９９９年上半年，上海人造板机器厂利用内蒙古西部地区所产沙柳灌材，在浙江沪千人造板有限公司年产１．５万ｍ３木质ＭＤＦ生产线上试制沙柳ＭＤＦ获得成功。经林…     

人造板用异氰酸酯胶粘剂的性质与应用

介绍了用荧光显微技术和ＤＳＣ分析方法研究人造板用异氰酸酯胶粘剂的胶接特性，以及近年来异氰酸酯在人造板中的应用。国内外研究结果表明，以异氰酸酯作为人造板胶粘剂可获得较ＰＦ、ＵＦ胶粘剂更牢固的化学胶接，尤其用于农作物秸杆（麦草、稻草）的胶接可得到符合我国木质Ａ类优等品标准的刨花板。     

中国家具工业的发展和木材利用

通过对中国的 2 6个家具制造厂商的访问使我们有了对中国家具市场及其将来木质材料的使用有了进一步认识。现针对中国家具工业进行评估 ,并对其发展和其本身对木质材料的需要提出一些意见。实木和木质人造板早已被用于中国家具工业 ,其中包括刨花板、阔叶材和规格产品的使用 ,中密度纤维板 (ＭＤＦ)更是热门的产品。大多数高收入的顾客宁愿选用实木或薄木贴面家具 (尤其是在家庭防火方面 )而不是板式家具 (即用人造板制造的家具 )。近年来 ,随着高收入顾客的数量大大增加 ,阔叶材、规格材和薄木在家具制造业中的需求也将持续增加。同样 ,也…     

中密度纤维板（MDF）的生产与加工

中密度纤维板（ＭＤＦ）的生产与加工国家人造板检测中心曹志强中密度纤维板起源于二十世纪６０年代初期，７０年代得到了飞跃发展，８０年代已遍及世界各国，证明它是世界上最成功的木材板制品。９０年代仍继续保持上升的势头。目前，世界各地ＭＤＦ生产能力见表１。１９...     

油棕丝中密度纤维板的研制与开发

介绍开发油棕丝的必要性和可行性,工业性试验表明油棕丝MDF,其质量不亚于木质MDF,目前国内可提供成套的油棕丝MDF制造设备,不仅可以使国产人造板生产线进入国际市场,且为我国海南、广东、福建等地区开发利用油棕丝MDF创造了条件,拓宽了人造板生产的原料来源。     

我厂生产中密度纤维板成套设备的特点

我厂生产中密度纤维板成套设备的特点商定柱（上海人造板机器厂上海２０１８０５）１国内外中密度纤维板生产概况１９６６年美国建成世界上第一个中密度纤维板厂（简称ＭＤＦ）以来，世界上至今已建成１０７家ＭＤＦ工厂，生产能力８７０万ｍ３／ａ，比１９８０年工厂增长...     

世界中密度纤维板发展态势

世界中密度纤维板发展态势王恺曹志强（中国林业科学研究院北京１０００９１）（国家人造板质检中心北京１０００９１）自１９６６年世界上第一条中密度纤维板（简称中纤板，英文缩写ＭＤＦ）生产线问世至今，经历了３０年的时间，形成了当前世界上发展最快的人造板产品。...     

Effect of host plants on development and reproduction of <Emphasis Type="Italic">Rhynchophorus ferrugineus</Emphasis> (Olivier) (Coleoptera: Curculionidae)

The development, survivorship and reproduction of red palm weevil Rhynchophorus ferrugineus, reared on five ornamental palm slices, were studied in the laboratory at constant temperature of 26°C. The developmental time of R. ferrugineus was 68.8 days on Washington palm (Washingtonia filifera), 74.1 days on Canary Island date palm (Phoenix canariensis), 82.1 days on Chusan palm (Trachycarpus fortunei), 85.4 days on pindo palm (Butia capitata) and 90.6 days on silver date palm (Phoenix sylvestris), respectively, and the developmental time on silver date palm was significantly longer than that on the other plants. The survival of immature R. ferrugineus ranged from 25.0 to 38.3%. Most mature larvae began to pupate at eighth-instar on Canary Island date palm and Washington palm, while on Chusan palm, Pindo palm and silver date palm, most of them began to pupate at ninth-instar. The mean lifetime fecundity of R. ferrugineus on Canary Island date palm, Chusan palm, Pindo palm, Washington palm and silver date palm was 267.8, 134.0, 109.8, 216.0, and 131.4 eggs, respectively, and lifetime fecundity on Canary Island date palm and Washington palm was significantly greater than that on the other plants. The intrinsic rate of natural increase (r _m ), net reproductive rate (R ₀) and mean generation time (T) were 0.038, 78.3 and 115.0 days on Canary Island date palm, 0.028, 33.1 and 125.5 days on Chusan palm, 0.029, 40.9 and 128.2 days on Pindo palm, 0.041, 64.0, 101.4 days on Washington palm, and 0.025, 30.6, 135.6 days on silver date palm, respectively. Based on population growth parameters, it is concluded that Canary Island date palm and Washington palm were the more suitable host plants and silver date palm was the least suitable host plant for R. ferrugineus.     

马占相思的优化利用

介绍了马占相思综合利用研究的概况。对用于制造中纤板、刨花板、细木工板芯板条的适宜性进行了分析。对马 占相思优化利用的选择要点也进行了探讨。     

Cambial Anatomy and Annual Rhythm of Secondary Xylem Development in the Twigs of Azadirachta indica A. Juss. (Meliaceae) Growing in Different Forests of Gujarat State

Abstract

Seasonal behavior of vascular cambium and development of secondary xylem were studied in the 2-3-years-old branches of Azadirachta indica A. Juss. (Meliaceae) growing in moist deciduous (MDF), dry deciduous (DDF) and scrub land (SF) forests of Gujarat State. Development of xylem began with the sprouting of new leaves in January in both MDF and DDF. Xylem production culminated in July in MDF whereas it reached peak in April and July in DDF. Cambial cells ceased to divide with the maturation of leaves in November and October in MDF and DDF, respectively. Mature xylem and phloem derivatives surrounded the cambium in December in MDF and November in DDF. Radial growth in the branches of trees growing in SF was found continuous throughout the year with peak cambial activity in April, July and November. In all the three forests, maximal radial growth was encountered in July when the rains were heavy. Cambial activity and xylem development showed significant correlation with the phenology of the trees in MDF and DDF whereas cambium was found active throughout the year and no correlation was found between the cambial activity and phenology in SF.     

密闭式高温冷凝水回收技术在中密度纤维板生产中的应用

阐述密闭式高温冷凝水回收技术在林产工业企业的应用前景，总结分析国家木材工业工程中心试基地应用此技术在ＭＤＦ生产中获得成功的经验。     

椰心叶甲生活习性初探

椰心叶甲是我国林业检疫性有害生物之一，其幼虫和成虫隐藏于棕榈科植物未展开的新叶或狭窄的夹缝中危害，危害部分仅仅限于最幼嫩的心叶部分，叶展开后才离去，严重时可使植株死亡。文章对该虫各个虫态的形态特征进行了描述，并对其生活习性进行了初步的研究，为其防治提供理论依据。     

The effect of Maya traditional harvesting on the leaf production, and demographic parameters of Sabal palm in the Yucatán Peninsula, Mexico

Palm leaves are an important resource for family households. The effect of harvest on leaf production, growth and fecundity of wild individual palm trees has been studied, but little is known about palm harvest in agro-forestry systems. In the Maya area of the Yucatán Peninsula, Mexico, leaves of the xa’an palm (Sabal yapa, and Sabal mexicana) have been used since pre-Hispanic days for thatching the roofs of traditional Maya houses. The Maya have introduced xa’an palms in homegardens and the care they provide them improves their growth. Maya householders agree on what they consider to be the best harvest intensity for xa’an, recommending one or two harvest events per year, and leaving one or two leaves in each event; however, there is not ecological information documenting whether the traditional harvesting practices are the most adequate to maintain or increase leaf production, and their effect on the growth and fecundity of the palm trees. In Maxcanú, Yucatán, we studied eight family homegardens with S. yapa and S. mexicana. The selected individuals from each homegarden (n = 252) underwent six harvest treatments for 2 years C: control, no harvest, Al: annual harvest, leaving three leaves on the palm, Am: annual harvest leaving two leaves, Ah: annual harvest leaving one leaf, Sl: two harvests per year leaving three leaves, Sm: two harvests per year leaving two leaves. Treatments Ah and Sm simulated the traditional harvest method, and the remaining treatments simulated higher or lower harvest intensities and frequencies. Leaf production was higher in individual palms under higher harvest intensities and frequencies (Ah, Sl and Sm), but palm growth and leaf size were not affected by harvest. Number of inflorescences per palm differed between treatments and between homegardens during the first year only, but we could not find a clear pattern of variation. Production of new leaves was affected by initial palm size and initial leaf number. Removing mature leaves while leaving the young ones, as well as the intensity and frequency, with which traditional harvest is practiced, stimulate palms to compensate the defoliation effects by producing new leaves. This practice is based on empirical Maya knowledge that enables the manipulation of micro-environmental conditions and the development of sustainable harvesting strategies for the xa’an palm in traditional agro-forestry systems.     

中密度纤维板设备变频节能分析

中密度纤维板生产线设备耗电量大、能耗高是制约中密度纤维板企业经济效益的主要原因。本文介绍了变频器的基本功能特点,提出中密度生产线设备变频节能改造的可行性,对风机、液压油泵、空气压缩机的运行特性及变频节能改造进行了分析。     

Veneer strand flanged I-beam with MDF or particleboard as web material IV: Effect of web material types and flange density on the basic properties

The balance of strength between the flange and web parts of veneer strand flanged I-beam was investigated by the following methods: (1) use of different web material types, such as plywood, oriented strand board (OSB), particleboard (PB), and medium density fiberboard (MDF), that have different strength properties; and (2) fabrication of I-beams with low-density flanges using low-density strands with PB web material. Replacing PB or MDF with plywood showed slight significant improvement in the modulus of rupture but not in the modulus of elasticity of the entire I-beam. However, PB and MDF showed competent performance in comparison with OSB, thus strengthening the promising future of the use of PB or MDF as web material to fabricate I-beams. Hot-pressing conditions used for I-beam production exerted slightly adverse effects on the bending properties of PB, but not on MDF, OSB, and plywood web materials. The flange density of 0.60 g/cm³ was considered to be the lower limit that provides I-beams with balanced mechanical properties and dimensional stability.     

Aggregation pheromone traps, a major component of IPM strategy for the red palm weevil, Rhynchophorus ferrugineus in date palms (Coleoptera: Curculionidae)

The population fluctuation of the red palm weevil, Rhynchophorus ferrugineus was studied, using the aggregation pheromone traps, during 2000 and 2001 in the United Arab Emirates. The insect population increased gradually from January to reach its peak in March, April, or May. The populations in three date palm plantations were much less in 2001 compared to 2000 with reductions of 29.7–51.7%. An evaluation of the performance of the pheromone traps showed that they could capture 4.4 to 20.7% of the resident populations of R. ferrugineus in the three different date palm plantations. No significant differences could be found in rates of capture between males and females. Individuals of marked weevils released in date palm plantations migrated 1–7 km from the plantations in which they were released. The released marked weevils were recaptured, mostly, within 3–5 days post release.