Experimental analysis of sound absorption effect of specially developed elastomeric thin thermoplastic polyurethane sub-micron fibre web layers placed on rigid layer and flexible layers

Abstract

The aim of this study is to determine the effect of sub-micron fibre web layers on sound absorption properties when they are placed on rigid substrate and flexible substrate. Elastomeric thermoplastic polyurethane (TPU) and composite TPU/PS (polystyrene) submicron fibre webs with both rigid glass fibre fabric reinforced epoxy composites (GFEC) and flexible polypropylene (PP) spunbond nonwovens have been examined. Elastomeric TPU sub-micron fibres and TPU/PS fibre web before and after soxhlet extraction were studied. Even though a thin layer of (less than 1 mm) electrospun sub-micron fibres were used with GFEC, sound absorption coefficient (SAC) improved from 0.1 to 0.4. Maximum SAC is drawn back to lower frequency (from 1250 to 500-630 Hz), when sub-micron fibre web is used on nonwoven. In conclusion, the mechanism of elastomeric thin sub-micron fibre webs on sound absorption for rigid GFEC and for flexible nonwoven is totally different than each other.

Research Progress on Sound Absorption of Electrospun Fibrous Composite Materials

“…This composite shows an excellent improvement in sound absorption compared with commercial sound absorption materials. Karaca et al [ 82 ] covered thermoplastic polyurethane (TPU) and TPU/PS sub-micro fiber webs on the surface of rigid glass fiber fabric reinforced epoxy composites (GFEC) and flexible PP spun bond nonwovens. The sound absorption coefficient of GFEC is improved from 0.1 to 0.4 by combining them with sub-micro web layers with a thickness of less than 1 mm, and the maximum sound absorption coefficient of the PP nonwovens moves to a lower frequency after being covered by sub-micro fiber webs.…”

Constructing Fireproof MXene-Based Cotton Fabric/Thermoplastic Polyurethane Hierarchical Composites via Encapsulation Strategy

“…Nowadays, many researchers make glorious efforts to combine TPU with other materials for a broad application prospect by full exerting the advantages of two materials. , They are focusing on modifying the high-performance fabrics with elastomeric polymers to improve its stab resistance, low-velocity impact and flexural properties and so on. − For example, after coating TPU film on aramid fabric reported by Zhang et al, the flexibility of the fabric was decreased slightly, whereas the stab resistance was significantly improved . Neslihan Karaca examined the alternative sound absorption layer, which consisted of three different elastomeric thin submicron fibers web integrated into rigid glass fiber fabric layers . Furthermore, Chi et al used a waste fabric and TPU materials to manufacture an external insulation wall board for buildings, furniture, and automobiles .…”

“…18 Neslihan Karaca examined the alternative sound absorption layer, which consisted of three different elastomeric thin submicron fibers web integrated into rigid glass fiber fabric layers. 19 Furthermore, Chi et al used a waste fabric and TPU materials to manufacture an external insulation wall board for buildings, furniture, and automobiles. 20 And the obtained cotton/TPU composites achieved a high tensile strength of 32.30 MPa despite low thermal stability.…”

An experimental study for evaluating the sound absorption coefficient of polylactic acid electrospun nonwoven

“…Electrospinning is a fascinating method for technological applications because of its strong control over fiber structure, flexibility, cost-effectiveness, easy modifiability, and scalability [3][4][5]. The advantages of electrospun nanofibrous mats as sound-absorbing have been indicated in studies focused on polymers such as polyvinyl alcohol (PVA) [6][7][8][9][10][11][12], polyvinyl alcohol/polyethylene oxide (PVA/PEO) [8,11], polyvinylpyrrolidone (PVP) [13][14], polyamide (PA) [15][16][17], polyacrylonitrile (PAN) [18][19][20], polyurethane (PU) [21][22][23][24][25][26], polyvinylidene fluoride (PVDF) [27][28][29], polystyrene (PS) [30], polyester [31], silicon dioxide (glass wool) [32] were studied.…”