果蔬瓦楞纸箱纤维复合材料的力学性能研究

Study on the Mechanical Properties of Corrugated Fiber Composite Materials for Fruit and Vegetable Boxes

为了提升果蔬瓦楞纸箱纤维复合材料的力学性能等,研究了模具温度、张紧力和压延处与模具出口距离对复合材料力学性能和表面质量的影响。结果表明,随着模具温度从240℃上升至270℃时,纤维复合材料的抗拉强度先增加后减小,在模具温度为250℃时取得抗拉强度最大值。随着张紧力从1 N增加至17 N,纤维复合材料的抗拉强度先增加后减小,在张紧力为13 N时取得最大值,继续增加张紧力,纤维复合材料的拉伸强度反而减小;当压延处与模具出口距离较小时(75 mm),可见纤维复合材料的表面存在纵向沟槽较浅,且表面附着物基本消失,整体表面较为光滑;果蔬瓦楞纸箱纤维复合材料制备过程中,适宜的模具温度为250℃、张紧力为13 N、压延处与模具出口距离为75 mm,此时树脂与纤维可以实现良好浸渍,具有良好的拉伸性能和表面质量。

In order to improve the mechanical properties of fruit and vegetable corrugated fiber composite materials,the study explored the effects of mold temperature,tension force and the distance between the calendering place and the die outlet on the mechanical properties and surface quality of the composite materials.The results indicate that as the mold temperature increases from 240℃to 270℃,the tensile strength of the fiber composite material first increases and then decreases,and that the maximum tensile strength is achieved at a mold temperature of 250℃.As the tension increases from 1 N to 17 N,the tensile strength of fiber composite materials first increases and then decreases,reaching its maximum value at a tension of 13 N.As the tension continues to increase,the tensile strength of fiber composite materials actually decreases.When the distance between the rolling point and the mold outlet is small(75 mm),it can be seen that the surface of the fiber composite material has shallow longitudinal grooves,and that the surface attachments basically disappear,resulting in a relatively smooth overall surface.Therefore,for the preparation of corrugated fiber composite materials of fruit and vegetable boxes,the suitable indexes are:mold temperature at 250℃,a tension of 13 N,and the distance of 75 mm between the rolling point and the mold outlet.Under these conditions,the resin and fibers can achieve good impregnation,with good tensile properties and surface quality.