三聚氰胺的加入方式对低释放甲醛脲醛树脂和E_1级中纤板性能的影响

本文就E1级中纤板用低释放甲醛脲醛树脂的生产过程中,以相同三聚氰胺的加入量而采用不同的加入方式对脲醛树脂和E1级中纤板性能的影响进行了具体研究。试验表明,三聚氰胺加入方式不同,对脲醛树脂和中纤板的性能影响较大。

浆料处理剂FC-706在中性造纸生产中的应用

在造纸打浆过程中合理添加浆料处理剂FC-706,可以明显防止白水系统中游离树脂絮聚,减少白水中胶黏物含量,达到改善成纸表观品质的目的。

竹木复合刨花板制造工艺研究

从胶水类型、施胶方法以及关键工艺参数等方面探讨了竹木复合刨花板的生产工艺,综合结果表明,竹木复合刨花板批量生产的工艺参数为:低摩尔比环保树脂胶、搅拌气流式喷胶法、竹刨花比例40%～60%、用胶量70 kg(干胶)·m-3、热压压力2.0 MPa、热压温度170℃、热压时间20 s·mm-1、刨花颗粒(芯层)0.5～1.0 mm、板厚8.8 mm。生产的竹木复合刨花板产品质量执行国家标准,质量可以达到国标A类刨花板一等品标准。

Modeling of Molecular Distillation Parameters： Case Study of Green Coffee Oil （Coffea arabica）

In principle, the free fatty acids, diterpene fatty acid esters and triglycerides from green coffee oil can be separated effectively, by a suitable separation process, due to the differences between molar mass and vapor pressures. In addition, in the case of component separation by molecular distillation, boiling point is replaced by evaporation rate at a given temperature. Several experiments and theoretical analyses have been carried out to identify the impact of important parameters （mean free path, evaporation rate, relative volatility and Knudsen number）, which determine the performance of these processes and degree of separation. In this work, a process development based on molecular distillation, for the enrichment of coffee diterpenes from green coffee oil is presented. The distillates were enriched in diterpene fatty acid esters and free fatty acids, while the residues were enriched in high molar mass triglycerides.