摘要:In this paper, distribution and activation of cured urea formaldehyde resins of recycled particles from waste particleboard were investigated by FT IR transmission spectroscopy. The results showed: the cured urea formaldehyde resins were mainly distributed in small sized particles, but little in large sized particles; the active groups still existed in the cured urea formaldehyde resins and might have contributions to the regluability of the recycled particleboard; the cured urea formaldehyde resins in recycled particles could reduce free formaldehyde emission from the remanufactured particleboard.
关键词:Infra red spectroscopy;Waste particleboard;Recyled particles
摘要:ply parquet is a kind of new and most competitive interior decorative material. This paper introduced charicteristics of the parquet, described the parquet production technology and addressed differences between conventional 3 layer parquet with side direction pre gluing of face layers before hot pressing and 5 layer parquet with face layers being pressed in high frequency heating press.
摘要:In this article, current situation of rubberwood resources, rubberwood processing and utilization technologies such as sawmilling,preservation and drying technology, rubberwood furniture manufacturing, rubberwood based panels manufacturing in China was reviewed briefly. Suggestions for further research and development of rubberwood processing and utilization were given.
摘要:The paper presented characteristics of wood/plastic fiber composites,raw materials used and requirement of the raw materials for making the composites. The paper also discussed the development trends of the composites in China etc. Market prospects of the composite were analyzed, too.
关键词:Wood/plastic fiber composites;Passenger car industry;Market prospect
摘要:Chinese fir wood was dried under 105 ℃, then vacuum pressure impregnating treated respectively with PVA, MF, PVA MF resins, dried again under high temperature(105 ℃~150 ℃), and finally kept for 14 days under room temperature for testing. Hygroscopicity, coefficient of resin remained, coefficient of volume expansion, rate of weight gain and coefficient of dimension variation, chromatism and hardness of specimens were measured and calculated. The testing results showed that the modification effect of Chinese fir was the best among the experiment conditions when MF resin was used as impregnating agent and then dried under temperature of 105℃~110℃.
摘要:White rot fungi is one kind of main wood decay fungi. It secretes many kinds of enzymes, such as lignin degrading enzymes, cellulose degrading enzymes and hemicellulose degrading enzymes.The enzymes depolymerize wood cell substances including lignin, cellulose and hemicellulose, which are nutrients for the enzymes. Because of the depolymerization, chemical and physical properties of wood could be changed quite a lot by white rot fungi. In recent years, tremendous progress has been obtained in research field about fungi mutritions, transmitting way of enzymes, mechanism of enzyme degradation, effect on wood properties and molecular genetics of decay fungi.In the near future, it is hoped to restrict white rot decay through changing fungi gene with gene engineering.
摘要:This paper revealed the current developing situations of wood processing technology from high efficiency utilization of wood resources, wood matrix composites, high tech application and environmental protection.
摘要:Business is full of the innovative technology. The way we do business yesterday, today and tomorrow are different. The final criteria is to enable customers to gain values from using our products. The strategy is to get the products to market faster than the competition. Therefore, the processing technology has to be flexible enough to cope with changing customers needs. In this article, the author has explained the necessity to use a technology which is most user friendly, flexibility and least set up time to enable maximum productivity.