集成材发明专利

申请号:CN202010027503.3,发明名称:一种环保高性能地聚物基胶黏剂制集成材及其制备方法,公开号:CN113122149A,申请人:北京林业大学,摘要:本发明公开一种无醛环保集成材及其制备方法。将原木经过锯解开榫处理后,涂抹以偏高岭土为地质聚合物原料,苯丙乳液为掺杂改性树脂,硅烷为偶联剂制备成的木材胶黏剂,再经加压胶结等后期处理得集成材。     

非结构用臭冷杉集成材的性能研究

使用常温快速固化的改性醋酸乙烯作为集成材胶黏剂。并通过设计正交试验,通过改变不同压力、时间、固化剂用量三因素制作出9组试件,经测定其压缩剪切强度,并分析得出对长白山臭冷杉结构集成材的压剪强度影响主次关系为：时间﹥MDI用量﹥压力。实验表明,臭冷杉结构集成材的最佳工艺条件为时间为2h,压力为3MPa,MDI用量为20%。该条件下制备的集成材具有良好的胶接性和耐水性,符合国标对结构集成材的要求。     

胶黏剂发明专利

专利申请号：200710072644.1 发明名称：单宁酸与硼酸改性豆粉胶黏剂及其制备方法公开号：CN101126008申请人：东北林业大学摘要：单宁酸与硼酸改性豆粉胶黏剂及其制备方法,涉及一种胶黏剂及其制备方法。     

胶黏剂发明专利

专利申请号：200710072644.1 发明名称：单宁酸与硼酸改性豆粉胶黏剂及其制备方法公开号：CN101126008申请人：东北林业大学摘要：单宁酸与硼酸改性豆粉胶黏剂及其制备方法,涉及一种胶黏剂及其制备方法。     

改性豆基蛋白质胶黏剂用于杨木胶合板生产初探

利用碱对豆粉进行处理,使蛋白质水解成为低聚肽,低聚肽进一步与甲醛反应生成稳定的蛋白质.这种物质可与苯酚和甲醛反应生成改性豆基蛋白质胶黏剂.采用单因素试验方法.对改性豆基蛋白质胶黏剂压制杨木胶合板的生产工艺进行了探讨.经过生产性试验证明,利用这种胶黏剂压制的胶合板的强度和抗水性可以和商业酚醛胶黏剂相媲美.这种胶黏剂豆粉的含量为63%,因而可以大幅减少木材胶黏剂用苯酚的量.     

木结构建筑结构材用胶黏剂的现状

介绍了木结构建筑结构材的种类,集成材、定向刨花板、结构胶合板、单板层积材及正交胶合木等;分别概述了这些木质构件用胶黏剂的研究现状,所用胶黏剂主要包括间苯二酚甲醛树脂胶粘剂、酚醛树脂胶粘剂、水性高分子异氰酸酯胶粘剂、三聚氰胺树脂胶黏剂和聚氨酯胶黏剂;展望了这些胶黏剂的发展趋势。     

胶黏剂发明专利

一种以大豆分离蛋白为基料的粉末生物胶黏剂,木质用耐水胶黏剂组合物,人造板用无醛胶黏剂,一种由木材液化物合成的酚醛树脂胶黏剂、其制备方法及其应用,一种环保型木材工业用胶黏剂,低碱量豆粉胶黏剂……     

木质素胶与石蜡乳液添加顺序对刨花板性能的影响研究

文章就胶黏剂与石蜡乳液添加顺序对采用木质素胶制备刨花板进行实验研究,通过设计正交试验,分析所得刨花板的物理力学性能,探讨胶黏剂与石蜡乳液的添加顺序对刨花板性能的影响.结果表明:胶黏剂与石蜡乳液的添加顺序对刨花板弹性模量影响最大,对24h吸水厚度膨胀率影响最小;先施加胶黏剂后添加石蜡乳液,能够使刨花板性能更佳.综合刨花板...     

胶黏剂发明专利

一种以大豆分离蛋白为基料的粉末生物胶黏剂,木质用耐水胶黏剂组合物,人造板用无醛胶黏剂,一种由木材液化物合成的酚醛树脂胶黏剂、其制备方法及其应用,一种环保型木材工业用胶黏剂,低碱量豆粉胶黏剂……     

无醛生物质胶黏剂制备技术及应用前景

简要介绍了生物质胶黏剂的研究现状,采用非粮淀粉、豆粕、脱脂豆粉、木质素等生物质作为原料制备无醛生物质胶黏剂的研究内容及关键技术,总结了无醛生物质胶黏剂的特点、性能和应用,简要评价了无醛生物质胶黏剂对我国人造板行业发展的影响。     

Einfluß der Trägerhöhe auf die Biegefestigkeit von Brettschichtholz

The influence of beam height on the bending strength of glued laminated timber was investigated. Tests showed that with increasing beam height the bending strength decreases for glued laminated timber beams without finger joints (wood failure). Theoretical values confirm calculated values of Eurocode 5. There is not a dependence of strength from the beam height by glued laminated timber beams with finger joints in the outer core. In most cases, glued laminated beams have finger joints in the outer core. Therefore, it is not useful to introduce a height factor in design of glued laminated beams in codes.     

环氧树脂改性双组份水性聚氨酯的研究

用甲苯二异氰酸酯(TDI)、聚醚多元醇(N210)、1,4-丁二醇(BDO)、二羟甲基丙酸(DMPA)和环氧树脂等为主要原料制备了水性聚氨酯。研究了nNCO/nOH、二羟甲基丙酸(DM PA)的用量、环氧树脂用量及固化剂用量对水性聚氨酯乳液和胶膜性能的影响,确定了较佳配方。结果表明,环氧树脂的加入显著地提高了涂膜的拉伸强度和对基体的粘合性。     

Evaluation of glue line shear strength of laminated timber structures using block and core type specimens

Monitoring and evaluation of glued laminated timber structures in service is essential to warrant its integrity, where non-destructive techniques play an important role. This paper describes the results obtained on glued laminated timber beams of maritime pine, with and without preservative treatment, and of spruce, exposed to natural outdoor environment as well as to artificial weathering. The assessment of glue lines’ shear strength was investigated through the extraction and testing of cores parallel and perpendicular to the glued lines and block shear specimens with 50 mm?×?50 mm and 20 mm?×?20 mm shear area. The results highlight the different performances of the various types of specimens tested, showing that the measured shear strength depends on the specimen size and that the size effect depends on the material strength giving a decreasing modification factor with the increase of strength in opposition to the constant factor suggested by standard EN 14080. They also show that shear testing of cores drilled perpendicular to the glued joints may be a promising tool in the assessment of glulam structures on site.     

环氧树脂改性水性聚氨酯皮革涂饰剂的性能研究

采用机械共混法制备了环氧树脂改性水性聚氨酯涂饰剂,研究了环氧树脂用量对涂饰剂乳液及涂膜性能的影响。结果表明:环氧树脂用量为8%时,涂饰剂的乳液稳定性仍较好;随着环氧树脂的加入量增大,乳液黏度和表面张力增大,乳液的平均粒径变大;涂膜的抗张强度、耐水、耐溶剂、耐酸、耐碱、耐盐性能随着环氧树脂用量的增加而提高,而涂膜断裂伸长率和回弹性随着环氧树脂用量的增加而下降。     

柞木弦／径切面胶合强度的试验研究

对柞木木材自身弦／径面强度及其水性高分子异氰酸酯(API)胶粘剂胶合试件弦／径面胶接强度进行了研究。结果表明:柞木木材API胶粘剂弦／径面胶合试件常态压缩剪切强度存在着差异;柞木径切面API胶合试件的常态压缩剪切强度比弦切面胶合试件的常态压缩剪切强度高;径切面API胶合试件的常态压缩剪切强度是弦切面的1.22倍;而柞木弦、径面API胶合试件的反复煮沸压缩剪切强度没有显著性的差别。柞木木材本身弦／径面顺纹抗剪强度试验结果表明:柞木木材径向的顺纹抗剪强度为14.41MPa,柞木木材弦向的顺纹抗剪强度为14.97MPa,尽管弦径向间差别不大,但经t-检验证明:柞木的弦／径向间顺纹抗剪强度有显著性的差别,柞木的径向顺纹抗剪强度比弦向顺纹抗剪强度小。     

PVC/木粉复合材料胶接件拉伸剪切强度的研究

参照国家标准GB/T 7124-2008《胶粘剂拉伸剪切强度的测定（刚性材料对刚性材料）》检测PVC/木粉复合材料胶合试件的拉伸剪切强度,发现：PVC/木粉复合材料胶合试件的断裂均发生在粘接区域外的复合材料本身,因而无法比较胶黏剂的粘接强度。为了能比较胶黏剂胶接接头的粘接强度,实验中将GB/T 7124-2008中规定的试件的厚度从1.6 mm加大至4mm。实验结果表明：采用环氧树脂粘接的PVC/木粉复合材料的拉伸剪切强度值高于用J-39丙烯酸酯胶黏剂粘接的复合材料的拉伸剪切强度。     

水性聚氨酯粘合剂的合成及在弹力皮革上的应用

采用甲苯二异氰酸酯(TDI)、聚乙二醇(PEG2000)、二羟甲基丁酸(DMBA)、环氧树脂和丙烯酸丁酯(BA)为主要原料,合成了环氧树脂改性的水性聚氨酯-丙烯酸酯粘合剂乳液,并应用在复合皮革上。实验获得最佳的复合工艺条件为:涂布量为30～35g/m2,复合压力为7～8MPa,复合温度为100～110℃。     

Bonding performance of heat treated wood with structural adhesives

Bonding of untreated, intermediate (hydro-thermolysed) and heat treated wood with melamine-urea-formaldehyde (MUF), phenol-resorcinol-formaldehyde (PRF) and polyurethane (PUR) adhesives was studied. An industrial heat treatment process (Plato ^®) was used, which included two separate heat treatment stages and a drying stage in-between. Laminated beams having four lamellas were prepared from untreated and treated timber for mechanical testing of the bond lines. The results of the tests showed that heat treatment affected the shear strength and the delamination of the laminated wood depending on the adhesive system used for bonding. The PUR and MUF adhesives performed in a rather similar way, and better than the PRF adhesive. The shear strength of laminated wood bonded with the waterborne MUF and PRF adhesives decreased for the specimens made of hydro-thermolysed timber and decreased further for the specimens made of fully heat treated timber. The difference in adhesive bond shear strength between untreated, intermediate and fully treated wood was less obvious in the case of the PUR adhesive. Delamination of the PRF bond line decreased drastically for all the specimens made of heat treated timber.     

Festigkeit großflächig geleimter Knotenverbindungen

The load bearing behaviour of joints with large overlapped glued areas was tested experimentally in 203 specimens. The following parameters were varied: The angle of gluing (0°, 30°, 60°, 90°), size of overlapped glued area (50, 100, 200, 400, 600 cm²), clamping pressure (0.2 and 0.6 MPa) and pressure technique (conventional clamping pressure, pressure by nailing), wood quality (knots in the overlapped glued area) and the kind of load transmission in the overlapped glued area (shear by loading in tension-compression, shear by loading in pure tension). Corresponding to the joint design the shear strength values obtained ranged from 1.4 MPa to 3.8 MPa. The angle of gluing, the kind of load transmission and, in small overlapped glued areas, the tension stresses perpendicular to the grain as a result of excentric chord junction were found to be the decisive parameters. Nailed-glued joints proved equivalent to conventional glued joints.