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胶合强度
    The Study on Factors for Their Influences on the Bonding Strength of Green Fire Retardant Plywood
    影响阻燃胶合板胶合强度因素的研究
    This Paper desecribes the adhesive made from 100% peanut shell with alkaline(PSA), being mixed with 30%~50% PF-resin for the first grade of plywood, and the bonding strength of the plywood meets the national standard of China(GB 9846. 4-88), and makes an approach to the PSA formulations,amounts of PF-resin and the hot bonding techniques of plywood.
    本文用100%花生壳经碱法工艺制成胶液(PSA),加入30%~50%的增强剂(PF)作Ⅰ类胶合板用胶粘剂,胶合强度达到GB9846.4-88标准.同时对PSA配方、PF用量及热压工艺进行了探讨.
    2)the bonding strength of 80 percent of the products was higher than 050 MPa;
    2)80%的产品胶合强度平均值达到0.50MPa以上;
    The bonding strength of the veneer was average 0. 812MPa slightly higher than 0. 779MPa ofveneer dried by convection drier with net conveyer.
    胶合强度平均0.812MPa,略高于网带对流干燥单板胶合强度0.779MPa。
    The results demonstrated that the ideal mixing ratio of powder TPF and water was 10∶9 by weight and the bonding strength was improved after laying the blended liquid adhesive for 24 h.
    结果表明 :粉状 TPF树脂胶与水按 10∶ 9的重量比混合均匀并陈放 2 4 h后再使用 ,胶合板的胶合强度比较理想 ;
    The influence factors were analyzed. The result showed that the properties were best when mol ratio of formaldehyde, urea, phenol was 10:8:1.The bonding strength reached specified value of GB/T 17656-1999.
    分析了各因素对改性脲醛树脂的影响,得到甲醛、尿素、苯酚摩尔比为10:8:1时树脂性能最佳,胶合强度和木破率均达到GB/T 17656-1999标准规定值。
    The free formaldehyde of modified UF resin prepared with the optimum craft is below 0.2%, the dissociative formaldehyde release of its plywood reaches EI grade, the bonding strength and hot pressing parameters are equal to the ones of urea formaldehyde resin glue that is used extensively at present and it can meet the demands of the existing wood-based plate production technology. It costs 6% more than general UF resin but has good environmental performance , obviously social and zoological benefit.
    由此制成的纳米SiO_2改性脲醛树脂游离醛含量<0.2%,用其胶接的胶合板甲醛释放量达到E_1级,板的胶合强度与热压工艺同目前广泛使用的脲醛树脂相当,可适应现有人造板的生产工艺,成本估算比一般脲醛树脂高6%左右,但环保性能好,社会和生态效益明显。
    (3) The formaldehyde emission of the plywood made of veneers soaked by BL-formaldehyde absorptive can accord with the E_0 class standard, and the bonding strength can be assured at the same time.
    同时针对不同的脲醛树脂,要采取不同的工艺措施; (3)将单板用BL—甲醛消纳剂浸渍后再按正常工艺生产的胶合板可达到环保E_0级标准,且胶合强度有保证。
    It was possible to decrease the formaldehyde emission by adding 10 % formaldehyde scavenger without weaken the bonding strength.
    加入10%重量的甲醛捕捉剂可在不影响胶合强度的同时降低甲醛释放量。
    The bonding strength of plywood produced with MUF resin was increased as amount of melamine increased, and decreased while the content of melamine was beyond 3 % (based on urea).
    随着三聚氰胺的用量不断增加,胶合板的胶合强度先是增加,在超过3 %以后,反而下降;
    The glue strength, Modulus of Elasticity, and Modulus of Rupture between the adhesive and PF are unanimous when the ratio of liquefied product to formaldehyde is 2.1. When the temperature is 140°C, the bonding strength is 1.65MPa, which meets to the requirement of I-plywood.
    对液化竹材甲醛树脂的胶合性能测试,结果表明当液化产物与甲醛的摩尔比为2.1时,液化竹材甲醛树脂的胶合性能与酚醛树脂胶粘剂一致。 热压温度为140℃时,胶合强度为1.65MPa,达到Ⅰ类胶合板胶合强度要求。
    The bonding strength of this product is 1 to 1.5 times as great as that of wood product. Its price is only half or even quarter of the price for woodbased plyboard.
    竹席胶合板的胶合强度一般是木材胶合板的1—1.5倍,其价格仅为木材胶合板的1/2—1/4;
    This paper deals with the analysis of chemical composition of masson pine bark and the manufacturing technique of its adhesive. The results show that masson pine bark adhesive mixed with 35% reinforing resin could be used for manufacturing exterior plywood. And the bonding strength of the plywood meets the reqirements of national standard ( GB1349-78 or GB9846. 4-88 )
    试验结果表明,马尾松全树皮胶加入35%的增强树脂,可以制造室外型胶合板,其胶合强度达到了国家GB 1349—78或GB 9846.4—88的标准要求。
    The dosage of curing agent had considerable influence on the bonding strength property of poplar veneer.
    固化剂的用量对胶合强度影响较大,可根据杨木的树种作适当调整
    The bonding strength was in 0 812MPa average,which slightly higher than that 0.779 MPa of convection drying with net conveyer. The results showed that drying of veneer of cottonwood, grown in plantation with the method stated above, is feasible.
    胶合强度平均 0 81 2MPa略高于网带对流干燥的 0 779MPa,结果说明此法干燥人工林杨木单板是可行的。
    The results show that isocyanate applied on iron wire netting can improve the bonding strength of MDF significantly, and its bonding strength can reach the national standard.
    结果表明 ,采用异氰酸酯涂刷铁丝网 ,可显著改善复合中密度纤维板的胶合性能 ,其胶合强度可以达到国家标准的要求。
    <abstract>der medium-strong acid condition (pH=3.5), the relationship between F/U molar ratio and free formaldehyde content and the effect of pH on the properties of resin are studied, and the proper formula and technical conditions for preparing low formaldehyde emission UF resin are worked out. The formaldehyde emission of the pressed plywood bonded with the resin reaches grade E1, the bonding strength can meet the requirement of type Ⅱ specified in GB9846-88.
    在中强酸(pH=3.5)条件下,对F/U摩尔比与游离甲醛含量的关系以及pH值对树脂和胶合板性能的影响进行了试验,确定了适宜的配方和工艺条件,压制的胶合板甲醛释放量可达到E1级,胶合强度符合Ⅱ类板的要求。
    the bonding strength of plywood pressed by it greatly increased with the nanometer silicon dioxide added during properly ultrasonic period.
    经合适时间的超声波分散后,其压制的胶合板胶合强度显著提高.
    The results showed that copper fiber ratio had a significant effect on the mechanical property of composite MDF, and some PMDI applied to the copper fiber could improve the bonding strength significantly, by which the bonding strength could reach the national standard.
    结果表明,铜纤维的施加比例对复合中密度纤维板的力学性能影响显著,在木材纤维 /铜纤维混合原料中施加一定量的异氰酸酯胶,可显著改善复合中密度纤维板的胶合性能,其胶合强度可以达到国家标准的要求。
    At the same time, the bonding strength wasalso improved and the optimal percentage of PUF was 9%.
    同时也提高了PVAc乳胶的胶合强度,加入量以9%为宜。
 

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