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- The effect of nanometer montmorillonite on properties of UF resin was explored. 探讨纳米蒙脱土对脲醛树脂胶黏剂性能的影响。
- The influences of modified UF resin by API or starch oxide on prepressing strength were studied in the test. 利用氧化淀粉在树脂合成后期、API在调胶时加入分别对脲醛树脂进行改性,探讨改性UF对胶合板预压强度的影响。
- Objective of this study is to chose best modified materials to raise the water resistance of UF resin adhesive. 研究旨在筛选提高脲醛树脂胶粘剂耐水性的最佳改性物质。
- Formaldehyde emission of melamine-modified UF resin was lower than that of unmodified. 用三聚氰胺进行改性的脲醛树脂的甲醛释放量明显低于未加任何改性剂的脲醛树脂。
- Optimum effects can be achieved by adding dry strengthening starch agent and wet strengthening UF resins agent, with starch 10% and UF resins?2% on dry pulp. 干强剂淀粉和湿强剂脲醛树脂的加入量分别为10%25和2%25(对浆)时,可获得最佳的增强效果。
- It was very useful to characterize the structure for the application of UF resin. 深入了解脲醛树脂的化学结构,对充分发挥其使用性能具有决定性意义。
- Orthogonal design was applied to comparative analysis on the variables in prepressing performance and(formaldehyde)(content) for modified UF resin. 采用正交实验法对比改性后胶合板的预压性能和改性后胶合板的甲醛释放量的变化。
- Formaldehyde emission from cured substance of three kinds of low toxic UF resin through different curing system with environment change was studied. 对不同固化体系下三种低毒脲醛树脂固化物随环境变化的甲醛释放量进行了具体研究。
- The experimental result indicate:free formaldehyde reduced obviously,flexility of modified UF resin is enhanced clearly. 实验结果表明:改性后游离甲醛含量明显降低,韧性有了较大的提高。
- The results showed the degree of the crosslinking of the modified UF resin was higher than that of the untreated UF resin. 结果表明,改性的UF树脂固化后的交联度大于未改性树脂固化后的交联度。
- The UF resin synthesis technology of the specific operating points and the traditional base-acid-alkali process were introduced. 介绍了强酸介质的酸性合成工艺的具体操作要点;
- Approach to improve water resistance and stability of UF resin adhesive is studied and amount of addition of composite modifier and stabilizer discussed. 研究了改善脲醛树脂胶粘剂耐水性与稳定性的方法，讨论了复合改性剂与稳定剂的添加量。
- Experiments were made by different methods of microwave plasma processing on curing time,application period,bonding strength and free formaldehyde content of UF resin. 试验结果表明:等离子处理对脲醛树脂胶粘剂的固化时间和适用期的影响不明显;
- The contents of main radicals in the different stages of UF resin synthesis were compared by FTIR Spectra in this article and its synthetic mechanism was discussed. 本文用FTIR分析比较了脲醛树脂合成过程中主要基团含量的变化情况,探讨了脲醛树脂胶粘剂合成机理。
- Hot water,acetic acid and sulphite solution were used separately in pretreatments of straw particles to improve fiber yield,UF resin curing and properties of rice-straw MDF. 采用热水、乙酸以及亚硫酸盐3种方法进行稻草预处理,找出经济可行的稻草中纤板预处理方法。
- The method is to add modified material in synthesizing UF resin adhesive,let it produce copolymer,thus to raise the water resistance of UF resin adhesive. 采用在合成脲醛树脂时,加入改性物质使之产生共聚体,从而提高脲醛树脂胶粘剂的耐水性。
- This paper states that low quality raw material and improper technique proceeding are main factors of affecting product reserving property in preparing UF resin. 本文阐述了在制备脲醛树脂胶的过程中,质量较差的原材料和不当的工艺过程,是影响成品贮存性的主要因素,指出防止生产中出现凝胶等问题的措施。
- The vesults of our vesearch on low toxicity UF resin for grade of extruded particleboard( perforated) showed: The formaldehyde emission of extruded particleboard made from low toxicity UF resins could meet E2 standard, and E1 standard. 对低毒脲醛树脂制造挤压刨花板(空)研究结果表明:采用低毒脲醛树脂,不仅挤压刨花板甲醛释放量可以满足E2级标准,而且甲醛释放量可以满足E1级标准。
- The performance index of plywood, particleboard and medium density fiberboard(MDF) , pressed by nano-SiO 2(1%)/ UF resin (F/U mole ratio=1.2), were above the demand of national standard and their dissociate formaldehyde release reached E-1 grade. 用纳米SiO2 (用量1%25 ) 脲醛树脂 (F U摩尔比 1 2 )压制胶合板、刨花板、中密度纤维板 ,板的各项性能指标都超过国家标准要求 ,甲醛释放量达到E1 级水平。
- In this paper, the manufacturing process of medium density fiberboard (MDF) made with wood chips of 50% Rubberwood ( Hevea brasiliensis ) and 50% Longbeak Eucalyptus ( Eucalyptus camaldulensis ) with UF resin LLM was studied. 通过使用 LLM型 UF树脂制造橡胶木和赤桉中密度纤维板的研究 ,评价用该树脂制造橡胶木和赤桉中密度纤维板的适应性。 橡胶木和赤桉各 50%25比例混和后施以 LL M型 UF树脂 ,按照 MDF常规工艺压制 9,1 2 ,1 6mm的试验板。
