Investigating the Influence of Weight Ratios of Polyester Fibers as an Adhesive on Mechanical and Acoustic Properties of Glass Fiber Composite Felts

This paper introduces glass/polyester fiber composite felts (GPCFs) to expand the application of glass fiber felt in composite fields, for satisfying the lightweight, high strength and excellent acoustic requirements. The effects of different weight ratios of polyester fiber on the physical properties, mechanical properties, and acoustic performance of GPCFs are mainly investigated. The results show that air permeability, tensile strength and flexural strength of GPCFs increase with polyester fiber weight ratios. The burst strength of GPCFs grows with polyester fiber weight ratios until it reaches a maximum value at 30 wt% and then the value tends to stabilize. GPCFs with fiber weight ratios of 20% and 30% have the best sound transmission loss (STL) and excellent sound absorption coefficients (SACs), respectively. Overall, polyester fibers can significantly improve the mechanical and acoustic performance as an adhesive and are quite convenient for lightweight design.