【作者】 何琼；

【导师】 陈南梁；

【作者基本信息】 东华大学 ， 纺织工程， 2006， 硕士

【摘要】 柔性复合材料作为一种新兴材料已经被广泛运用到城市建筑、广告装饰、交通运输、家居生活等各个领域,发展前景相当广阔。 目前生产柔性复合材料主要有涂层法、压延法和贴合法。由于压延法成本低、效率高,且压延产品综合性能优良,因此在实际生产使用中占有很大比例。压延类柔性复合材料的增强结构以机织物和经编双轴向织物为主,一般采用涤纶织物与PVC树脂进行复合。 在实际使用过程中,复合材料不可避免地会受到各种外力作用,因此材料的力学性能是进行产品设计时需要考虑的重要指标。本课题主要针对压延类柔性复合材料的撕裂、剥离和拉伸性能进行分析探讨。 本课题在研究过程中,采集了大量的样品,有经编双轴向针织物增强复合材料和机织物增强复合材料,有不同纱线细度和织物密度的复合材料,也有不同涂层厚度的复合材料。我们对这些材料均进行了撕裂、剥离和拉伸性能测试,观察实验过程并进行理论分析,然后根据实验数据对不同试样之间以及相同试样的各个性能之间进行分析比较。 首先,我们研究了经编双轴向针织物和机织物及其增强复合材料的撕裂性能。分析基布及复合材料的撕裂过程,比较两者的差异及复更多还原

【Abstract】 As a newly arisen material, flexible composites have been widely used in many fields, like constructions, advertising and transportation. Obviously, it has a promised future in commercial productions.Now we produce flexible composites by coating, calendering or laminating thermoplastic resin onto reinforcing materials. The calendering method is most widely used for its low cost and great efficiency. The reinforcing materials used for calendaring flexible composites are usually warp knitted bi-axial fabrics or woven fabrics. We use polyester fabrics calendered with PVC film to form the flexible composites.Composites will inevitably suffer outside forces while applied to actual use. And its physical properties are most important issues needs to be considered while designing the products. So our study is focused on the tearing, delaminating and tensile performances of the calendered flexible composites.We collected a quantity of various samples, including warp knittedbi-axial fabric reinforced composites and woven fabric reinforced composites, flexible composites with different yarn counts, fabric densities and coating thickness. We tested their tearing, delaminating and tensile performances, to observe the testing process and analyze the acquired data.Firstly, we researched on the tearing performances of warp knitted bi-axial fabric reinforced composites and woven fabric reinforced composites. We analysed the tearing process and compared the differences between these two composites. Moreover, we find the difference between warp and weft tearing properties. We find that the yarn count, fabric density and coating thickness affect the composites’ tearing property by affecting the degree of yarn concentrating in tearing process. These factors are linearly related to the composites’ tear resistant force. Besides, we studied the differences of various tearing testing standards and analysed how they affect the testing results.Secondly, we studied the delaminating performances started from the interfacial adhesion mechanism. For the warp knitted bi-axial fabric reinforced composites and woven fabric reinforced composites, we found out that for their different fabric structures, they have distinct interfacial adhesion mechanisms and delaminating resistant forces. Then we analyzed the relationships between the tearing and delaminating properties of the flexible composites. And in this paper, we discussed themethod about how to express the delaminating property more correctly. We also try to test some composites’ delaminating resistant forces by jointing two specimens together with high frequency electricity.Lastly, we studied the tensile property of the calendered flexible composites and their initial modulus. We compared the tensile properties of different samples and find out the difference between warp and weft tensile property.We studied the physical properties of calendered flexible composites on the basis of current research achievements and tried to resolve the problem we met during our experiment. The research we made on testing method is foundation of further studies. Besides, we find out the factors affecting the composites’ physical properties, which has conducting value in practical designing and production.更多还原