Thermoplastic polyurethanes/polyester/polypropylene composites: Effect of thermoplastic polyurethanes honeycomb structure on acoustic-absorbing and cushioning property

Abstract

A new acoustic absorbing/cushioning composite is fabricated by thermoplastic polyurethanes honeycomb structure -thermoplastic polyurethane honeycomb cushion and grid, and composite nonwoven in this study. Composite nonwoven is composed of different layers of polyester/polypropylene nonwoven and polyester nonwoven. Research result shows that layer combination of polyester/polypropylene nonwoven and polypropylene nonwoven affects acoustic absorption and thermal conductivity of resulting composite nonwovens. The thermal conductivity of composite nonwovens Downloaded from decreases to 0.02213 W/(m K), showing excellent thermal-insulating property. Honeycomb structure-thermoplastic polyurethane honeycomb cushion and grid broadens the acoustic absorbed frequency and improves the mid-and high-frequency absorption coefficient and cushioning property of thermoplastic polyurethane/polyester/polypropylene composites. Incorporation of different honeycomb structure into composite nonwovens presents diversified acoustic-absorbing characteristic profiles. The resulting 35-mm-thick thermoplastic polyurethane/polyester/polypropylene composites absorb 85% acoustic waves at 1250 Hz and 94.2% at above 2000 Hz as well as 92.88-96.59% impact energy. Therefore, it becomes an excellent alternative for protective wall in kindergarten and gerocomium and compartment wall in the building.

Morphological Structure, Rheological Behavior, Mechanical Properties and Sound Insulation Performance of Thermoplastic Rubber Composites Reinforced by Different Inorganic Fillers

“…A number of soundproof composites has been developed likes wood-waste tire rubber composite [ 13 ], inorganic particles/polymer composites and nano-composites, including polypropylene/CaCO 3 [ 14 ], resin/hollow glass bead [ 15 ], poly(vinyl chloride)/mica [ 16 ], rubber/carbon nanotube [ 17 ], polyvinylpyrrolidone/graphene oxide [ 18 ], poly(vinyl acetate) mesoporous carbon [ 19 ], and so on. Besides, the porous structure [ 20 ] and honeycomb structure [ 21 , 22 ] can also enhance the sound insulation performance. But it is hard to achieve both high soundproof and mechanical properties of traditional polymer composites.…”

3D Fabric/Polyurethane Foam Composites Containing Various Fabrics: Property Evaluations

“…The cells that constitute the core deform as a result of energy transmission, and they are then fractured in order to dissipate the residual energy when the damage energy reaches their limits. As a result, 3D fabric/PU foam composites can absorb the impact energy via the energy transmission in their skin as well as the porous structure of the PU foam material [8]. Figure 4 shows the sound absorption of the various 3D fabric/PU foam composites, and composites C and D both have a sound absorption coefficient of 0.9, which indicates their sound absorption.…”

Preparation of Microcellular Foams by Supercritical Carbon Dioxide: A Case Study of Thermoplastic Polyurethane 70A

“…Zhang et al used the supercritical CO 2 process to generate expanded thermoplastic polyurethane beads and then manufactured foam sheets by compression molding [20]. Recently, TPU foam has been treated as a potential material in biomedical applications as a porous scaffold, a lightweight shape memory medical device, a bioinspired artificial skin and an acoustic absorbing material [21][22][23][24][25]. Regarding the design of novel medical devices, such as the hearing protection device used in a noisy workplace, a low hardness TPU is more favorable since it provides high softness.…”