杉木间伐材生产层压板工艺研究

本文探讨了利用小径杉木间伐材生产建筑模板用材──层压板的生产方法与工艺条件；并研究了各种工艺参数对产品性能的影响，确定了生产层压板的较佳工艺条件。     

杉木间伐小径材材性试验研究

杉木间伐小径材材性试验结果与成材杉木比较:密度小,晚材率较低,生长较快,吸水性较强;材质为未成熟幼林材种,物理性质较差,力学强度有所降低,作为建筑结构用材时,在设计与施工中必须注意到其强度的降低,采取必要的措施。杉木间伐小径材纤维长度与成材相似,纤维宽度略宽、纤维长宽比值略小,但尚为良好的纤维原料。     

杉木间伐材层压板生产工艺探讨

本文探讨了利用小径杉木间伐材生产建筑模板用材—层压板的生产方法和工艺条件，并探讨了各种工艺参数对产品性能的影响，确定了生产层压板的较佳工艺条件。同时也介绍了杉木间伐小径材的材性特征。     

杉木间伐小径材利用调查报告

<正> 杉木是我国特有的用材树种,生长快、材质好、用途广、产量高,是群众最喜爱的造林树种。木材产量约占全国商品材的1/5～1/4,在国民经济中占有重要位置。杉木又是我省主要产品和用材树种,因此杉木间伐材是本省林业经营抚育生产中主要木材来源之一,但由于间伐材处于未成熟阶段,其材质性能较差于成材杉木,当前又面临大量积压,就是被利用其经济价值与效益也不如成材的杉木。怎样充分开发利用杉木间伐材中的小径材(系指小头直     

杉木间伐材生产人造板的可行性研究及存在问题

阐述了杉木间伐材的材性和利用杉木间伐材为原料生产各种类型木质人造板的可行性 ,生产工艺及存在的问题。     

杉木间伐材的开发利用：杉间材胶合木的研究

本文以杉木间伐材胶合木的开发研究为内容探索间伐材利用的途径。文中对影响杉胶木生产的主要工艺参数和其他因素进行较深入的分析探讨。     

杉木间伐材的材性和工业化利用

研究了杉木间伐材的材性 ,探讨了利用杉木间伐材为原料生产各种类型木质人造板的可行性、生产工艺及存在的问题。     

杉木间伐材阻燃处理工艺的研究

通过正交试验，分析了真空度、真空时间、浸注压力、浸柱时间4个因素对杉木间伐材吸药量、氧指数、抗弯强度的影响，并提出了较为理想的阻燃浸注处理工艺参数，可用于指导生产实践。     

杉木间伐材压缩成型工艺的研究

应用自行设计与制造的模具，将经过软化处理的杉木间伐材进行高温加热，压缩成型，并测定了处理材的密度，压缩变形恢复率和硬度等物理力学性能指标，以探求较佳的工艺条件，研究结果表明：杉木间伐材经高温加热，压缩成型处理，能大大改善其各项性能。     

Optimum preparation technology for Chinese fir wood/Ca-montmorillonite （Ca-MMT） composite board

For this study, an intercalation compounding method was used to prepare Chinese fir wood/Ca-montmorillonite （Ca-MMT） composite board to improve its properties such as surface mechanical properties, flame retardance and dimensional stability. By virtue of water-soluble phenolic resin （PF）, Chinese fir wood and Ca-MMT were mixed by pressure and vacuum impregnation. The optimum impregnation technology of Chinese fir wood/Ca-MMT composite board was obtained by using an orthogonal design and a single factor design of pressure and vacuum impregnation, using weight percent gain （WPG） as the basic index. The results are as follows： 1） On the basis of the orthogonal design and an actual experiment, the optimum preparation technology of Chinese fir wood/Ca-MMT composite board is 20% PF resin dispersion concentration （wt%）, 1.0 CEC amount of organic intercalation agent, 0.098 MPa vacuum degree, 5% concentration of Ca-MMT and 1.0 MPa pressure. 2） The WPG of the composite board samples of 450 mm length was much larger than that of the samples of 600, 750 and 900 mm length. Warm water extraction contributed little to WPG     

Demarcation of juvenile and mature woods of planted Chinese fir and its wood quality prediction

lntroductionChinesefir(Cunntwh8mi8IanceoIat8(Lamb.)Hook)isaveryimportantspeciesofwoodresourcesinSouthernChina.TheheredityandameliorationonChinesefirareaIwayspaidgreatattention.However,inthepast,thefocaIpointOftheworkonheredityandamelioF8tionwashowtoCuItivatetheChinesefirwithcharaCtersoff8stgrowth,goodfigure,wideadaPt-abilityandStrongdiseaseresistance.LittleworkwasdoneonameIior8tionofwoodquaIity.AlongwiththecompositionchangeoftheforeStresourcesinChina,Chinesewoodindustryismoredependen…     

疏水改性对杉木微观力学性能的影响

为提高木材尺寸稳定性,利用烷基烯酮二聚体对杉木进行疏水改性处理,同时运用纳米压痕技术分析评价疏水处理对木材纳米力学性能的影响.结果表明,当处理剂的质量分数为5％、处理时间为30 min时,疏水效果最好,同时最节约成本;疏水处理会降低杉木S2层细胞壁的弹性模量,当处理剂质量分数为5％时影响较小;杉木S2层细胞壁蠕变值会随处理剂质量分数和处理时间的增加呈现上升的趋势.     

Creep of Chinese fir wood treated by different reagents

In order to investigate the effect of different reagents on changes of the crystalline region and amorphous region (Matrix) in wood cell walls, the creep behavior of Chinese fir (Cunninghamia lanceolata) wood treated with dimethyl sulfoxide(DMSO) and diethyl amine, sulfur dioxide and dimethyl sulfoxide mixture (1)EA-SO2-DMSO), and the untreated wood at oven-dried, air-dry and water-saturated states during adsorption and desorption processes were all examined in air or in water. The measurements were carded out at ambient temperature and atmospheric pressure. The load is constant with 62 g or 0.607 6 N. The results obtained were as follows: 1) The instantaneous compliance J0 and the creep compliance J of specimens decrystallized with DEA-SO2-DMSO solution were bigger than those of DMSO swollen wood, and the latter was still much bigger than those of untreated wood. 2) For untreated wood, J0 and J increased with equilibrium moisture content (EMC) of wood, but there was not apparent correlation between wood EMC and the relative compliance. 3) Specimens treated with DMSO and DEA-SO2-DMSO mixture were recrystallized after immersion in water, and the degree ofrecrystallization of the former was larger. 4) For oven-dried specimens, the creep compliances in water were bigger than those in air. But for fiber-saturated and water-saturated specimens they were nearly equivalent to each other.     

杉木容器嫁接苗培育技术

通过对杉木容器嫁接苗培育的试验与生产推广实践,总结出容器制作、基质配比,容器砧木苗定植摆放、嫁接,苗期管理及容器嫁接苗出圃等一整套成功的操作技术。培育出的苗木达到了苗干通直、高度80 cm以上、轻质的理想效果,为新建分步式种子园和原有种子园间伐后补植改造提供了技术保障。     

Effect of compression on the liquid absorption of Chinese fir wood with different heartwood-to-sapwood ratios

In this study, the Chinese fir (Cunninghamia lanceolata Hook.) specimens with different ratios of heartwood thickness to sapwood thickness (HS) were radially compressed at different compression speeds, and then absorbed amine copper quat-type D (ACQ-D) preservative solution under the negative-pressure produced by the recovery of compression deformation. The liquid uptake (Al), the recovery rate of compression deformation (Rs) and the chemical absorption (Ac) of samples were determined, as well as the overall distribution of density and effective component of ACQ-D (i.e., copper in wood), the mechanical properties such as surface hardness were also measured. The Al, Rs, Ac values of compressed samples including the whole heartwood ones were higher than those of uncompressed samples, showing that radial compression had an obvious positive effect on improving the liquid absorption of heart-wood. Higher compression speed of 3 mm·min–1 is preferable since the samples with that speed could reach the highest Al and Ac; in addition, more deformation fixation has been produced possibly because of the faster heat and moisture transmission at the higher compressed speed, and more bonds of hydrophobic nature were formed, leading to the higher surface hardness and density. A consistent tendency of the density distribution and the copper retentions along the thickness direction could be explained that the layers with higher density have smaller volumes of void areas, and more chemicals were absorbed and fixed, resulting in the higher copper retentions.     

无性系杉木木材物理性质研究

对金洞林场杉木无性系19年生(不含苗龄)的木材物理性质研究,结果表明:杉木优良无性系木材的基本密度、径向干缩率、弦向干缩率、体积干缩率分别是0.279 g.cm-3、2.90%、5.10%和7.85%;整个无性系的基本密度、径向干缩率、弦向干缩率、体积干缩率分别是0.301 g.cm-3、3.28%、5.26%和8.27%;而对照CK的基本密度、径向干缩木材基率、弦向干缩率、体积干缩率分别是0.275 g.cm-3、2.80%、5.10%和8.00%.研究证明:杉木优良无性系不但木材产量高,而且木材质量也并不比当地实生苗差.选用杉木优良无性系造林,不但能增加木材产量,而且材质也不会因速生而变劣.     

杉木无性系结实系数变异的研究

以杉木无性系结实系数为指标，评价杉木种子园无性系的结实能力，试图克服结实量指标的偏差因素，提高无性系再选择的准确性。研究结果表明，杉木无性系结实系数属高重复力指标，单株为０．３３５￣０．６１１，无性系为０．６０２－０．８２５，为中上等遗传控制。无性系间ＣＶ为１３．２８￣４３．２４％，无性系内ＣＶ为７．６７￣３３．７５％，系间变异大于系内变异，结实系数可有效地应用于无性系再     

杉茶复合经营效应的研究

在对杉茶复合种植模式进行调查的基础上,分析了不同杉木密度对茶树体生长、茶叶产量、品质的影响,并对其经济效益进行测算,提出了合理的杉茶复合种植模式;杉茶复合种植,杉木采用单行南北向种植,株距２ｍ左右,行距１２－１６ｍ;如散生种植,杉木密度控制在３１３－４１７株／ｈｍ＾２时,茶叶产量不受影响。每年每公顷木材生长可增加产值９５０元。