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影响密度板生产工艺的重要因素

来源:admin发布时间:2017-10-27 14:22:10

不同材种其树皮含有率也不一,按重量计,一般占百分之八至百分之十五;按体积计,树皮的体积又 与树干径级有关,径级越大所占比例越小。

The bark percentage of different species is different, and the weight is generally eight percent to fifteen percent. According to the volume, the bark volume is related to the diameter class of the trunk, and the smaller the diameter is, the smaller the proportion is.

树皮组成中韧皮约占百分之九十,外 表皮占百分之十,经削片后的木片其树皮含有量一般在百分之十至百分之十五,此含有量对山东密度板质量尤其 力学性能影响不大。但树皮含有量超过百分之二十五时,不仅会使产品的力学强度下降,还会影响产 品的板面质量,给产品的二次加工带来问题。

The bark in phloem accounted for ninety percent, accounted for ten percent of the outer skin, the chip after the wood bark content in ten percent to fifteen percent, the content of MDF quality especially mechanical properties have little effect. But when the bark content is more than twenty-five percent, it will not only reduce the mechanical strength of the product, but also affect the quality of the surface of the product, which will cause problems in the two processing of the product.

山东密度板哪家好

针、阔叶材种的细胞种类很多,形态各不相同,通常归纳为薄壁细胞和厚壁细胞两大类。 一般纤维系指韧皮纤维及被子植物中呈纺锤状的细长细胞而言。除纤维外的所有其他细胞通 常称谓杂细胞。

There are many kinds of cells in the needle and hardwood species, and their morphology is different. They are usually classified into two categories: parenchyma cells and thick walled cells. The general fiber refers to the phloem fiber and the spindle like elongated cells in angiosperms. All other cells except fiber are usually referred to as heterozygous cells.

纤维形态,针叶材和阔叶材差异也很大,针叶材 管胞和阔叶材木纤维相比,长度大、长宽比大、细胞 壁厚。纤维形态不仅因树种不同而有差别,即使是同 一树种也随其树龄、立地条件以及早、晚材等不同而 有变化。

Fiber morphology, coniferous wood and broad-leaved wood also vary greatly。 Compared with hardwood wood, softwood tracheid has larger length, larger aspect ratio and thicker cell wall。 Fiber morphology not only because of different species are different, even the same species but also with their age, site conditions and earlywood and latewood varied。

针、阔叶材的细胞结构和含量或纤维形态的变异,均是影响密度板生产工艺和产品质量 的重要因素,这也是为什么在密度板生产中强调针、阔叶材搭配使用的一个原因。

Variation of conifer and broadleaf cell structure and content or fiber morphology, are important factors that influence the process of MDF production and product quality, which is why in MDF production stressed conifer and broadleaf collocation use for a reason.

 

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