The influence of hybrid effect on mechanical properties and acoustic performance of hybrid fiber wet-laid felts

This experimental work was aimed at the characterization of new hybrid fiber wet-laid felts (HFWFs), which consisted of wood pulp fibers, glass fibers as well as hot-meltable fibers. The effect of different fiber ratios in the hybrid of felts was investigated. Mechanical-physical properties of HFWFs had been evaluated for tensile strength, burst strength, flexural strength, air permeability, sound transmission loss (STL) and sound absorption coefficient (SAC). The results showed that hybrid ratios affected the mechanical-physical properties. HFWFs with fiber weight ratios 1:0:1(WPF:GF:HMF) exhibited the best mechanical properties (tensile strength, burst strength and flexural strength) due to the increasing interfacial adhesion. Furthermore, weight ratios affected air permeability and resulted in different acoustic properties. HFMFs with fiber weight ratios of 1:1:2 and 2:3:1 had good SAC and excellent STL, respectively. It also found that the greater the tensile strength of HFWFs, the higher the acoustic resonance frequency.