纸浆模塑在不同温湿度条件下的缓冲性能研究

发布时间：2019-03-24 11:27

【摘要】：作为环保包装材料,纸浆模塑广泛应用于各种产品的缓冲包装。在运输过程中,纸浆模塑缓冲衬垫主要是通过自身变形来吸收能量,并延长激励时间达到缓冲的目的。运输环境的改变会影响纸浆模塑的力学性能,在实际的流通环节,包装件会受到复杂环境条件的作用,会造成包装的损伤,有可能会不同程度损坏内装物,造成丧失部分或者全部使用功能或价值。本文通过研究不同温湿度条件下纸浆模塑制品的缓冲性能,为纸浆模塑制品的设计提供理论依据。用于包装的缓冲包装材料变形时表现为弹性和塑性,不同包装材料的载荷与变形曲线不同。材料在受到外力作用时,应力、应变会发生变化。实际生产中影响纸浆模塑制品缓冲性能的因素主要来自生产环节、材料的物理参数和缓冲结构特性。在标准温湿度条件下测定了纸浆模塑材料的基础数据,包括厚度、密度、耐破度和弹性模量。其中厚度、密度和弹性模量为仿真分析提供依据。依据国标GB/T462-2003《纸和纸板水分的测定》对不同温湿度条件下纸浆模塑材料的含水率进行了测定。然后根据国家标准GB/T8168-2008《包装用缓冲材料静态压缩实验方法》对纸浆模塑制品的静态抗压性能进行测定。分析温湿度变化对纸浆模塑制品静态抗压性能的影响。并探究温湿度变化材料含水率与制品缓冲性能变化规律之间的联系。利用有限元软件对纸浆模塑静态抗压进行仿真模拟,并与实际结果相比较,探究仿真实验的可行性。本文的试验结果有助于纸浆模塑制品的缓冲衬垫设计,提高运输环节纸浆模塑制品的安全性。
[Abstract]:As an environmentally friendly packaging material, pulp molding is widely used in cushioning packaging of various products. In the process of transportation, the pulp molded cushioning liner mainly absorbs energy through its own deformation, and prolongs the excitation time to achieve the purpose of buffering. The change of transportation environment will affect the mechanical properties of pulp molding, in the actual circulation link, packaging parts will be affected by complex environmental conditions, will cause damage to packaging, and may damage the internal contents in varying degrees. Result in the loss of part or all of the use of function or value. In this paper, the cushioning properties of pulp molded products under different temperature and humidity are studied, which provides a theoretical basis for the design of pulp molded products. The deformation of cushioning packaging materials for packaging is elastic and plastic, and the load and deformation curves of different packaging materials are different. When the material is subjected to external force, the stress and strain will change. The factors that affect the cushioning performance of pulp molded products in actual production mainly come from the production link, physical parameters and cushioning structure characteristics of the material. The basic data of pulp molding materials, including thickness, density, rupture resistance and elastic modulus, were measured under standard temperature and humidity conditions. The thickness, density and elastic modulus provide the basis for simulation analysis. The moisture content of pulp molded material under different temperature and humidity was determined according to the national standard GB/T462-2003 (determination of moisture content of Paper and Paperboard). Then the static compressive properties of pulp molded products were measured according to the national standard GB/T8168-2008 (static Compression Test method of cushioning Materials for Packaging). The influence of temperature and humidity on the static compressive properties of pulp molded products was analyzed. The relationship between the moisture content of the material and the cushioning property of the products is also discussed. The static compression of pulp molding was simulated by finite element software, and compared with the actual results, the feasibility of the simulation experiment was explored. The test results in this paper are helpful to the design of cushioning pad for pulp molded products and to improve the safety of pulp molded products in transportation.
【学位授予单位】：湖南工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TB484.1

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