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Analysis Of Tensile Properties And Application Prospects Of Flax Fiber

2013/8/2 8:30:00 19

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Flax Fiber Composite Material Tensile Properties

a href= "http://www.91se91.com/news/index_c.asp" > linen fiber < /a > is the main bearing part of reinforced composite material, similar to the "load-bearing wall" of the building. Therefore, accurate data on tensile properties of flax fibers is an important part of the research on the mechanical properties of flax fiber reinforced composites. However, due to the influence of many factors, the mechanical properties of flax fibers are quite dispersive. Therefore, it is not enough to accurately evaluate the mechanical properties of flax fibers only by the tensile strength and tensile modulus measured by experiments. In this study, the distribution rules of flax fiber's mechanical properties are found by studying the tensile test data of linen fibers, so as to provide basis for the use of flax fibers. First, the tensile test data of a large number of single flax fibers were obtained. Then, using Weibull distribution, Gauss distribution and Griffith theory to do statistical analysis of these experimental data, find out the distribution rules, so as to find out the tensile properties data of flax fibers with large tensile properties. 
 the dispersity of performance restricts the industrial application .
 the properties of flax fiber are affected by many factors such as flax harvest time, temperature change, soil quality, climate, geographical location and pretreatment. At present, the application of flax fiber in the field of industry has not been fully opened yet, but the prospect is quite broad. - single Ming Jing .
 industry expert opinion /p >
 accelerating the civilian use of flax composites .
 at present, flax fiber is widely used in the domestic "a href=" http://www.91se91.com/news/index_c.asp > clothing industry < /a >. There are not many industrial sectors involved, mainly scattered in the composite materials for automotive interior decoration. The reason is mainly because the cost of linen cultivation is higher than that of other chemical fiber products, and the time is longer, so the development of flax nonwoven products is limited. But flax products are biodegradable and renewable, and have little environmental pollution, which is incomparable to any other reinforced fiber materials. The development and research of flax fiber reinforced composites and accelerating the civilian use of flax fiber composites have become a hot topic. 
 data from abroad: 
 the study on flax fiber maturity is very few. 
 at present, the world has studied more and more researches on < a href= "http://www.91se91.com/news/index_c.asp" > cotton fiber > /a > maturity, including the research on the influence of fiber maturity on physical, chemical properties and spinning properties, but only a few reports on the maturity of flax fiber have been reported abroad. The maturity of flax fiber refers to the thickening of the cell wall, the thicker the cell wall, the better the maturity, and the normal mature flax fibers are rough, glossy and light brown. The foreign literatures only reported on the experiment of flax fiber in 3 different stages of growth for the maturity and corresponding content of lignin, wax and nitrogen and so on, and did not make further analysis and discussion. At present, there is no research report in this field. In recent two years, due to climatic factors, the growth performance of flax fiber is poor, which has brought adverse effects to the normal export of products. For example, when the production of cotton and ramie blended products, the ratio of flax fiber to the finished products is different from that of the finished products. The proportion of flax blending measured by the standard testing institutions is 3~8 percentage points less than that of the fibers actually invested. Therefore, enterprises will face huge claims when they export their products. 
 flax fiber reinforced thermoplastic composite is a kind of composite material with flax fiber as reinforcement and thermoplastic polymer as matrix. Flax fiber reinforced thermoplastic composites have good mechanical properties and low cost, and flax fibers are renewable, biodegradable, environmentally neutral, and thermoplastic matrix can be recycled after the material is discarded. At the same time, flax fiber reinforced composites also have the characteristics of small density, high specific strength and specific strength, good molding performance, good material properties, good fatigue resistance, good damping performance, and good thermal stability. They have been developing rapidly in the past 10 years. 
 flax fiber composites produced by different technologies can meet different performance requirements, and are widely used in automobile, construction, geotechnical engineering, spanportation and so on. Linen fabrics are used as reinforcing materials, and the composite materials produced by contact molding can be used for washing basins, bathing facilities, pleasure boats, etc. the flax twisting yarn and felt as reinforcement material and pipe products manufactured by winding technology are mostly used for various spanmission pipelines and industrial pipelines. With different materials such as sub Majyou Ko, yarns, nonwoven felt, and so on, extrusion parts produced by extrusion are commonly used to make structural boards, chairs, simple storage shelves, pallets and so on. 
 experimental operation, the key data /p >
 Weibull, starting from the series model of weak ring theory, a widely applicable mathematical probability model, namely Weibull distribution model, has been obtained. The Weibull distribution is based on the weak ring theory of brittle materials. Its basic content is that the strength of the same fiber is not the same everywhere, and it always breaks at the weakest section and shows the fracture strength. Experiments show that the strength of brittle materials mostly obeys the Weibull distribution of probability function, and the life of materials is closely related to the strength of materials. The application of Weibull distribution to probability distribution of fiber strength starts with the rise of high-performance fibers.