层积纤维板制造工艺的研究

层积纤维板是利用未裁边的纤维板经过备料、涂胶、组坯、热压胶合、裁边等工序而制成的一种人造板。层积纤维板采用中心对称结构,以避免产生应力和翘曲变形,其表面可以采用普通纤维板,也可以采用压花纤维板和饰面纤维板。厚度一般为5～30mm。层积纤维板的制造工艺、物理力学性能和使用情况如下。     

火炬松制造中密度纤维板工艺的研究

通过对火炬松制造中纤维板制板工艺条件的研究,探索降低中密度纤维板制造过程中纤维施胶量的可能性。结果表明,火炬松制造中密度纤维板是可行的;采用８％的施胶量制板;板材的主要物理力学性能可达到美国ＭＤＦ国家标准ＡＮＳＴＡ２０８．２－１９９４和我国ＭＤＦ国家标准７０型及８０型特级品的要求。     

室外型中密度纤维板的制造工艺研究

本文主要探讨了以４，４’－二苯基－甲烷－二异氰酸酯（ＭＤＩ）为胶粘剂生产室外型中密度纤维反的制造工艺，同时研制了ＭＤＩ胶粘剂专门使用的脱膜剂，以解决生产过程中的热压粘板的问题。用ＭＤＩ胶粘剂生产的中密度纤维板，其物理力学性能达到了欧洲中密度纤维板工业标准（ＥＭＢ－９５）中的室外型中密度纤维板指标。     

杉木室外型中密度纤维板的制造工艺

采用正交试验法并对试验结果作统计分析 ,通过验证、跟踪试验 ,为杉木制造室外型中密度纤维板提供了依据。研究结果表明 :以杉木为原料制造室外型中密度纤维板是可行的 ;在本研究确定的施胶量、板密度及热压工艺条件下 ,实验室制得 9mm厚试验板材的所有性能指标均达到了国家标准的要求     

室外型杨木中密度纤维板的制造工艺

以正交试验为基本方法 ,以统计分析为主要手段 ,对室外型杨木中密度纤维板的制造工艺进行了研究。通过验证、跟踪试验 ,结果表明 :以杨木为原材料制造室外型中密度纤维板是可行的 ;在施胶量 12 %、板密度 0 .82 g/ cm3、热压温度 180℃、热压时间 7min条件下 ,试验室制 9mm厚板材的所有性能指标均达到国家标准要求     

微薄木贴面装饰纤维板制造工艺初探

微薄木贴面装饰纤维板制造工艺初探娄四维（中南林学院湖南株洲４１２００６）微薄木贴面装饰人造板，是近年来流行的高档装饰材料，广泛应用于家具制造和室内装饰。应用最多的是用三合板作基材生产的微薄木贴面装饰胶合板（以下筒称装饰胶合板）。可是，胶合板价格较高，...     

绿色纤维板的研究与应用

随着我国经济的高速发展,城乡居民生活水平的提高,对室内进行全面装修和家具更新已成为大众化的消费时尚.而室内装修及家具工业中广泛应用人造板作为基材,于是就出现甲醛污染问题.过去人们经济收入少,室内装修多数仅以局部进行,家具也往往是少量更新,因此甲醛污染并不十分突出,可以容忍.     

脲醛树脂胶稻草中密度纤维板的性能

通过用稻草代替木材制造脲醛树脂胶稻草中密度纤维板的可行性研究 ,探讨了板材密度、施胶量和防水剂等工艺因素对稻草中密度纤维板性能的影响。结果表明 :在实验室条件下 ,当板材名义密度为 0 .8g/ cm3和施胶量为 17%时 ,脲醛树脂胶稻草中纤板性能达到现行国家标准一等品的要求 ;施加 1.2 %的石蜡乳液 ,板材的耐水性亦能满足国标要求     

室外型中密度纤维板的制造工艺研究

本文主要探讨了以４，４’－二苯基－甲烷－二异氰酸酯（ＭＤＩ）为胶粘剂生产室外型中密度纤维板的制造工艺，同时研制了ＭＤＩ胶粘剂专门使用的脱模剂，以解决生产过程中的热压粘板的问题。用ＭＤＩ胶粘剂生产的中密度纤维板，其物理力学性能达到了欧洲中密度纤维板工业标准（ＥＭＢ－９５）中的室外型中密度纤维板指标。     

MUF胶黏剂的稀释对降低纤维板施胶量的影响

研究了三聚氰胺改性脲醛树脂(MUF)胶黏剂稀释前后低施胶量纤维板的物理力学性能,结果表明:随着施胶量的降低,纤维板的弹性模量(MOE)、静曲强度(MOR)和内结合强度(IB)有所降低,而吸水厚度膨胀率(TS)则有所上升。加水稀释至1.5倍的MUF胶黏剂可以明显提高施胶量为9%的纤维板的MOE、MOR和IB,降低纤维板的TS,而对甲醛释放量影响不大(E1级),并与12%施胶量的纤维板性能相当。而进一步稀释的MUF胶黏剂将使纤维板出现分层鼓泡等现象。     

中密度纤维板密度在线检测技术的研究

在国产中密度纤维板生产线上设计、研制"密度在线控制系统",检测结果表明:每张密度板的密度差距控制在2%之内,密度超差比例由原来的12.50%降低为6.25%,系统检测精度达到2%左右。该控制系统具有检测耗时短、精度高、易于调整的特点,在年产6.0×104m3的生产线上使用可多生产板材600 m3,年均提高产值1%,经济效益显著。该技术适合在国产中密度纤维板生产线上应用。     

Manufacture and properties of ultra-low-density fiberboard

Low-density fiberboards with densities ranging from 0.05 to 0.50g/cm³ were manufactured with steam injection pressing. Bond-type and foam-type isocyanate compound resin adhesives were used separately at 10% and 30% resin content levels. Two types of different-size fibers from softwood were used. Mechanical, dimensional, thermal, and sound insulation properties of the fiberboards were tested. The results are as follows: (1) Bond-type isocyanate adhesive showed higher mechanical and dimensional properties of low-density fiberboards than the foam-type adhesive. (2) Fiberboards produced from small fibers have better mechanical and dimensional properties than those made from large fibers. (3) Thermal conductivity of fiberboards depends more on the board density than on the type of resin or fiber dimension. At a board density lower than 0.2 g/cm³, the thermal conductivity is almost equivalent to those of thermal insulation materials such as polystyrene foam and rock wool, (4) Generally, the sound absorption coefficient of low-density fiberboards tends to increase at higher sound frequency. As the board thickness increases, low-frequency sounds are more readily absorbed by boards.Part of this report was presented at the 46th annual meeting of the Japan Wood Research Society, Kumamoto, April 1996     

Pyrolysis of medium density fiberboard impregnated with phenol-formaldehyde resin

Woodceramics (WCS) are new porous carbon materials that have been shown to possess many excellent properties, but the chemical mechanism during pyrolysis has not been reported yet. In order to investigate this process, pyrolysis of medium density fiberboard (MDF) was analyzed by thermogravimetry coupled with Fourier transform infrared spectroscopy (TG-FTIR) in this study. The results showed that the pyrolysis consisted of three stages up to 700°C. The first stage of the pyrolysis occurred below 240.0°C and was mainly due to moisture evaporation. The second stage between 240.0° and 390.2°C accompanied the main mass loss. The maximum pyrolysis speed (mass loss) was about 3.79% per minute at 313.2°C. This was believed to coincide with the cleavage of ether bridges between the wood material and phenol-formaldehyde (PF) resin, and pyrolysis of carbohydrate. At higher temperature, the pyrolysis of PF resin and lignin was the main reason for the mass loss in the third stage. The microcosmic environments of both the MDF and PF resin in the MDF treated with PF resin were different from the untreated MDF and PF resin, so that the temperatures at which their pyrolysis occurred and the quantities of evolved gases were different. During the process of WCS preparation, the rate of temperature increase should be very slow before it reaches 700°C, especially at around 313.2°C, at which point violent pyrolysis occurs. Such temperature control should allow uniform sintering of the sample and should reduce flaws in the product.     

提升我国纤维板产业国际竞争力的对策探讨

运用国际市场占有率指标对我国纤维板产业国际竞争力的现状进行定量评价,分析了影响我国纤维板产业国际竞争力的主要因素,寻找中国纤维板产业国际竞争力的优劣势所在,从原材料、产品、企业规模等方面提出增强中国纤维板产业国际竞争力的具体对策。     

中密度纤维板市场发展预测

作者详细论述了中密度纤维板的性能特点;并收集、整理了国内外中密度纤维板生产及消耗情况的最新资料;做了有理、有据的市场发展预测。     

Development of binderless fiberboard from kenaf core

Binderless fiberboards with densities of 0.3 and 0.5 g/cm³ were developed from kenaf core material using the conventional dry-manufacturing process. The effects of steam pressure (0.4–0.8 MPa) and cooking time (10–30 min) in the refining process, fiber moisture content (MC) (10%, 30%), and hot-pressing time (3–10 min) on the board properties were investigated. The results showed that kenaf core binderless fiberboards manufactured with high steam pressure and long cooking time during the refining process had high internal bond (IB) strength, low thickness swelling (TS), but low bending strength values. The binderless fiberboards made from 30% MC fibers showed better mechanical and dimensional properties than those from air-dried fibers. Hot-pressing time was found to have little effect on the IB value of the binderless board at the refining conditions of 0.8 MPa/20 min, but longer pressing time resulted in lower TS. At a density of 0.5 g/cm³, binderless fiberboard with the refining conditions of 0.8 MPa/20 min recorded a modulus of rupture (MOR) of 12 MPa, modulus of elasticity (MOE) of 1.7 GPa, IB of 0.43 MPa, and 12% TS under the optimum board manufacturing conditions. Part of this article was presented at the 54th Annual Meeting of the Japan Wood Research Society, Hokkaido, August 3–5, 2004     

几种废弃木材木粉对脲醛树脂固化行为的影响

测定不同废弃木材纤维的pH值和缓冲容量,探讨不同废弃木材木粉及其混合物,对脲醛树脂固化行为的影响。结果表明,不同废弃木材原料木粉对脲醛树脂的峰值温度均有影响。在实际生产中,企业可以根据实际情况选择相应的原料种类组织生产。     

Chemical characteristics of straw fiber and properties of straw fiberboard with different pretreatments

Surface chemical characteristics of straw fiber have a great effect on the properties of interfacial conglutination between straw fiber and adhesives. In our study, straw was treated by four different methods—hot water, acetic acid, sodium sulfite and sodium hydrid sulfite. Our results show that the main chemical group of straw fiber, under the four different treatments, has not changed significantly. The acetic acid treatment reduces pH values of straw fibers and has a significant effect on the internal bonding strength of straw fiberboards. The modulus of rupture and modulus of elasticity did not clearly improve with the four different treatments. The thickness swelling of straw fiberboard treated in different ways is higher than that of standard values. It is concluded that acid treatment is optimal for producing good quality straw fiberboard. __________ Translated from China Forest Products Industry, 2006, 33(4): 24–26 [译自: 林产工业]     

仿生木材结构穿孔纤维板吸声性能

以中密度纤维板为基材,通过设计穿孔结构及打孔方式,达到拓宽木质穿孔板吸声频带和提高声学性能的目的.利用分层加工工艺制备了带侧孔结构的穿孔纤维板,采用阻抗管传递函数法对穿孔纤维板吸声性能进行了测试.通过正交试验方法,研究了主孔直径、穿孔率、倾斜角度对穿孔纤维板吸声性能的影响,并获得了较优的制备工艺,随后利用控制变量法研究...