几种成熟的胶粘剂生产工艺

一、中密度纤维板用低毒胶: 该胶是纯脲醛树脂胶,成本低,工艺条件简单,生产周期短,凡拥有制胶车间的中密度纤维板厂均可生产。用该胶生产出的中密度纤维物理力学性能指标能达到国家标准规定的一等板要求,其游离甲醛释放量可控制在30mg/100g以下。     

脲醛树脂的合成技术及其在中密度纤维板生产中的应用

探讨了中密度纤维板生产中的脲醛树脂合成工艺和改性技术,介绍了降低甲醛释放量和施胶量的实用措施。     

E1级中密度纤维板的研制

国家标准《室内装饰装修材料－－人造板及其制品中甲醛释放限量》的强制实施，引起了国内众多生产厂商对人造板制品甲醛释放量的强烈关注。本研究以自制的改性脲醛树脂为胶粘剂，在设定的工艺参数条件下制得的两种规格的中密度纤维板，甲醛释放量均达到了E1级标准。     

E1级中密度纤维板的研制

国家标准<室内装饰装修材料-人造板及其制品中甲醛释放限量>的强制实施,引起了国内众多生产厂商对人造板制品甲醛释放量的强烈关注.本研究以自制的改性脲醛树脂为胶粘剂,在设定的工艺参数条件下制得的两种规格的中密度纤维板,甲醛释放量均达到了E1级标准.     

浅谈中密度纤维板用胶黏剂生产过程控制

胶黏剂质量的好坏是保证中密度纤维板质量的先决条件。本文介绍了陕西省龙草坪林业局中密度纤维板厂脲醛树脂胶黏剂的制备工艺过程,并分析了胶黏剂生产过程中的工艺参数及其控制,为中密度纤维板生产企业的脲醛树脂胶黏剂生产提供参考。     

E1级三聚氰胺改性脲醛树脂的研制

从中密度纤维板的甲醛释放机理和降低甲醛释放量的方法入手,设计出三聚氰胺改性脲醛树脂配方,并对三聚氰胺加入量、摩尔比、助剂和固化剂的选择进行探讨,用该树脂压制的中密度纤维板的各项理化性能指标均达到E1 级要求。     

几种成熟的胶粘剂生产工艺

一、中密度纤维板用低毒胶: 该胶是纯脲醛树脂胶,成本低,工艺条件简单,生产周期短,凡拥有制胶车间的中蜜度纤维板厂均可生产。用该胶生产出的中密度纤维物理力学性能指标能达到国家标准规定的一     

E1级三聚氰胺改性脲醛树脂的研制

从中密度纤维板的甲醛释放机理和降低甲醛释放量的方法入手，设计出三聚氰胺改性脲醛树脂配方，并对三聚氰胺加入量、摩尔比、助剂和固化剂的选择进行探讨，用该树脂压制的中密度纤维板的各项理化性能指标均达到E1级要求。     

室内环境下家具用中密度纤维板甲醛释放规律初探

本文采用GB18584—2001《室内装饰装修材料木家具中有害物质限量》中规定的木家具中甲醛检测方法——干燥器法,研究了在室内环境下家具用中密度纤维板甲醛释放的规律,得出了在相同环境下,中密度纤维板素板甲醛释放量大于饰面后的中密度纤维板,饰面后的中密度纤维板需要更长的时间才能将板中所含甲醛释放到一个比较低的水平。通过研究甲醛释放量与时间的关系,为家具企业选用中密度纤维板提供参考,同时也为有效防控游离甲醛提供数据支撑。     

室内环境下家具用中密度纤维板甲醛释放规律初探

本文采用GB18584—2001《室内装饰装修材料木家具中有害物质限量》中规定的木家具中甲醛检测方法——干燥器法,研究了在室内环境下家具用中密度纤维板甲醛释放的规律,得出了在相同环境下,中密度纤维板素板甲醛释放量大于饰面后的中密度纤维板,饰面后的中密度纤维板需要更长的时间才能将板中所含甲醛释放到一个比较低的水平。通过研究甲醛释放量与时间的关系,为家具企业选用中密度纤维板提供参考,同时也为有效防控游离甲醛提供数据支撑。     

Visualisation of UF resin on MDF fibre by XPS imaging

Using X-ray photoelectron spectroscopy (XPS) will distinguish urea formaldehyde (UF) resin on the surface of medium density fibreboard (MDF) fibre. High spatial resolution XPS imaging was employed to 2-dimensionally map the presence and concentration of carbon and nitrogen on pressed MDF fibre. Using image analysis routines, composite XPS images of fibre and UF resin were produced for laboratory and commercially prepared MDF panels using the C1s and N1s peaks respectively. Results showed that MDF could be analysed directly, and the presence of UF resin features imaged on fibre was comparable to UF resin characterised by confocal microscopy. Due to low surface nitrogen contents, the XPS imaging instrument was necessarily operated at a low resolution, and with a relatively small field of view. This may make the XPS imaging method less attractive for visualising UF resin on wood fibre compared to other microscopy techniques.     

Optimization of processing parameters of medium density fiberboard using response surface methodology for multiwalled carbon nanotubes as a nanofiller

In the present work, medium density fiberboard (MDF) panels were produced using multiwalled carbon nanotubes (MWCNT) reinforced urea formaldehyde resin. Response surface methodology was employed to optimize the relationship between the three variables, viz. pressing time, percentage of UF resin and percentage of MWCNT, used in the fabrication of MDF, and the influence of variables on the internal bonding (IB) and modulus of rupture (MOR) was studied. The optimum conditions based on the IB strength were determined as 8.18 % of UF resin, pressing time of 232 s, and MWCNT of 3.5 %. Similarly, the optimized conditions for MOR are also reported in this paper.     

Potential of the crude glycerol and citric acid mixture as a binder in medium-density fiberboard manufacturing

European Journal of Wood and Wood Products - Urea–formaldehyde (UF) resin is the main commercial adhesive used for medium-density fiberboard (MDF) manufacturing. UF resin is used to produce...     

Use of aluminum oxide nanoparticles in wood composites to enhance the heat transfer during hot-pressing

In this study, the effect of Al₂O₃ nanoparticles on the heat-transfer properties of medium density fiberboard (MDF) was investigated. Al₂O₃ nanoparticles were added at two levels (0.5 and 1.0 %) by percentage weight fraction of dry wood fibers to urea formaldehyde (UF) resin. The core temperature profile and thermal conductivity tests showed higher rate of heat transfer after addition of nanoparticles, subsequently it has improved the bonding strength of MDF. Differential scanning calorimetry was used to estimate the heat evolved during the exothermic reaction of UF resin curing. Scanning electron microscopy shows good dispersion of nanoparticles. Thermal conductivity of UF resin improved after nanoparticles addition proved by KD2 pro results. Modulus of rupture, modulus of elasticity and thickness swelling also improved.     

中密度纤维板用脲醛树脂缓冲容量的研究

探讨中密度纤维板用脲醛树脂缓冲容量的测定,并分析影响脲醛树脂缓冲容量的因素,脲醛树脂缓冲容量对其固化时间和压制中密度纤维板性能的影响。     

环保中/高密度纤维板生产成本与性能问题 系统解决方案的研究(Ⅲ)

使用永港·伟方UF-1改性剂制备的改性脲醛胶粘剂生产E1级中纤板,胶粘剂生产成本降低10%,板材的各项力学性能均能达到国家标准,甲醛释放量达到了E1级标准,具有推广价值。     

低甲醛释放量刨花板生产技术的研发

介绍了使用低甲醛与尿素物质的量之比的脲醛树脂(UF)/三聚氰胺尿素甲醛共缩聚树脂(MUF)混合体系以及NH4Cl+CHOOH双组分复合固化剂生产低甲醛释放量刨花板的工业化生产技术,所生产的刨花板甲醛释放量低于5mg/100g,2h吸水厚度膨胀率低于8%。