摘要:The technology of making fly-ash particleboard has been developedwith fly-ash from two different power plants.The results showed: ①The Quan-tity and kinds of additives should be different depending on the chemical com-positons and the quality of different fly-ashes.②The ratio of fly-ash and woodparticle was the most outstanding factor which affected the mechanical and phys-ical properties of fly-ash particleboard.③The density was a very notable factoraffecting the properties of fly-ash particleboard and it should not be lowerthan 0.90g/cm ̄3.④Increasing the resin content could improve the MOR of fly-ash particleboard,but the effect was not remarkable when resin content was biggerthan 9%.Brief information on the productive experiment, primary economical analysisand prospect of the market of fly-ash particleboard was also introduced in the article.
关键词:Fly-ash;Fly-ash.particleboard;Additive;Ratio of fly-ash andwood particle
摘要:hickness variation of particleboard plays an important role in the factors of affecting the accuracy of panel furniture. The results indicated that the accuracy of panel furniture was influnced by the thickness variation of particleboard obviously.
摘要:A method of alkaline pretreatment of particles was designed to produce three types of chips.The pretreatment of particles in 1%aqueous solution of NaOH for 30 minutes offered a possibility of producing PF bonded particleboards with minimal irrecoverable swell and a reduction in thickness swelling.The method used in this study could be used to produce more stable PF particleboard.
摘要:The variations in fiber length, specific gravity and comp0sition content of three Italian poplars clones for pulpwood Tvere reported in this pa-per. Ir radial direction,fiber length,specific gravity and cellulose content of wood increased from pith outward, and level off after 8 to 10 years old;lignin and pentosan content decreased from pith to bark, and level off after 10 years old. The radial variation of fiber length-width ratio was similar to the patten of fiber length.Along the stem height,fiber Iength decreased gradually and specific gravity increased from base upward.Based on radial variation of fiber length and specific gravity at 1.3 m height within trees,the duration of juvenile peroid was determined about 8 years old. Its lower specific gravity is improved by tree breeding. Based on variations in the whole tree’s fiber length,specific gravity,chemi-cal composit and growth property,harvesting of Italian populars for pulp-wood at 8 to 9 years old was good.
摘要:On the basis of analyzing the drying feasibility and the study on drying characteristics of small diameter birch,locust and ash logs,the drying technology of small diameter logs was summed up. The practice of production indicated that it was feasible to use this technology for drying small diameter logs.
摘要:Quality control is essential for the effective production supervi-sion as well as for the standardization of the product properties.The proper-ties of particleboard depend on a variety of influencing factors.The exampleof a Chinese particleboard plant shows which influencing factors take effect onthe individual basic operations of the board production and which productiondata have to be acquired for the production control.These data as well as theparticleboard characteristics have been determined according to a test schedulewithin a three-month period by the employees of the plant.Analysis and eva-luation of the data were carried out. The most important results are represen-ted in the following work. Furthermore,measures are proposed for the qualityimprovement of the particleboards of this plant.
摘要:A new kind of glue-applying automatic control system was developed.With this system,glue applying can be carried out evenly and glue can be well-distributed on particles,resulting in reduced adhesive consumption,improved working condition and reduced labour intensity.
关键词:particleboard;Glue applying;Microcomputer automatic control system
摘要:The samples of larch(Larix gmelini) were treated with 1%:solu-tion of NaHCO3. The dimensional stability,moisture absorption,functionalgroups and ultrastructure changes of the samples before and after the treat-ments were analyzed and compared using IR,SEM and chemical analysis.Themain factors which influence the dimensional stability are found. The researchresults laid a foundation of modification and utilization of larch wood.