The Design and Optimization of Nonwoven Composite Boards on Sound Absorption Performance

2013 ◽  
Vol 365-366 ◽  
pp. 1217-1220 ◽  
Author(s):  
Chen Hung Huang ◽  
Yu Chun Chuang
Keyword(s):  
Sound Absorption ◽  
Nonwoven Fabric ◽  
Polyester Fiber ◽  
Design Parameters ◽  
Composite Board ◽  
Design And Optimization ◽  
Nonwoven Fabrics ◽  
Needle Punching ◽  
Optimal Value ◽  
Absorption Performance

This study aims to investigate the optimal value of design parameters for the sound-absorbing nonwoven composite board. The number of laminated layers and thickness of polyester fiber are viewed as the design parameters for fabricating the nonwoven composite board. The 2D, 7D and 12D polyester fibers are individually mixed with 4D low-melting point polyester fiber to produce 2D polyester nonwoven fabric (2D-PETF), 7D polyester nonwoven fabric (7D-PETF) and 12D polyester nonwoven fabric (12D-PETF) respectively. The developed nonwoven fabrics are then used to fabricate 2D-PET, 7D-PET and 12D-PET nonwoven composite boards through the multiple needle-punching and thermal bonding techniques. The sound absorption performance of each PET composite board is carefully examined. The experimental results reveal that the 7D-PET composite board with 10 laminated layers has the optimal sound absorption performance.

Using unwrapped filament tows to strengthen sandwich composites: Puncture and bursting resistance

2018 ◽  
Vol 49 (10) ◽  
pp. 1374-1388
Author(s):  
Jia-Hsun Li ◽  
Ching-Wen Lou ◽  
Jing-Chzi Hsieh ◽  
Jia-Horng Lin
Keyword(s):  
Mechanical Performance ◽  
Nonwoven Fabric ◽  
Efficient Production ◽  
Sandwich Composites ◽  
Puncture Resistance ◽  
Nonwoven Fabrics ◽  
Multiple Parameters ◽  
Needle Punching ◽  
Custom Made ◽  
Single Pattern

The combination of appropriate materials and structural design can compensate for flaw of a single pattern, providing the products with better functionalities. In this study, the custom-made nonwoven fabric machine can unwrap the filament tows before needle punching stage. Sandwich composites are proposed, consisting of two nonwoven fabrics as surface layers and laminated loops of filaments as the core. The puncture resistance of the sandwich composites are examined in terms of weight of filament loops and needle-punching depth, examining their influences. The employment of filaments has a remarkable influence on the mechanical performance of the composites. GF4G has static puncture resistance, dynamic puncture resistance, and bursting strength that are 89%, 30%, 88% higher than those of GF1G; 332%, 127%, and 500% higher than those of 2G; and 671%, 400%, and 1260% higher than those of G. Using filaments to reinforce nonwoven fabrics only requires simple equipment and easy operation. Furthermore, based on the requirements of different final products, diverse filaments and multiple parameters can be combined, thereby providing the composites with efficient production, solid reinforcement, and broad applications.

Investigation of a Compound Perforated Panel Absorber With Backing Cavities Partially Filled With Polymer Materials

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
C. Q. Wang ◽  
Y. S. Choy
Keyword(s):  
Sound Absorption ◽  
Normal Incidence ◽  
Polyester Fiber ◽  
Polymer Materials ◽  
Element Simulation ◽  
Parallel Arrangement ◽  
Cavity Configuration ◽  
Absorption Performance ◽  
Good Agreement ◽  
Panel Absorber

The paper concerns the sound absorption performance of a compound absorber which consists of a parallel arrangement of multiple perforated panel absorbers of different backing cavity depths partially filled with poroelastic polymer materials. Three polymer materials are considered: expandable polystyrene (EPS) foam, polymethacrylimide (PMI) foam, and polyester fiber. The normal incidence sound absorption coefficients of the compound panel absorber are tested experimentally. Results show that the former two foams can achieve similar absorption performance to the rigid cavity configuration, while the resonances shift to lower frequencies due to the changes of effective cavity depths. It is also found that the additional attenuation by polymer foams may improve sound absorption, but the effect is marginal. For polyester fiber, results show that it performs more like a single perforated panel absorber. Finite element simulation of the compound panel absorber is also discussed, and good agreement is observed between simulated and experimental results.

scholarly journals Investigation about the Effect of Manufacturing Parameters on the Mechanical Behaviour of Natural Fibre Nonwovens Reinforced Thermoplastic Composites

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2560 ◽  
Author(s):  
Imen Gnaba ◽  
Peng Wang ◽  
Damien Soulat ◽  
Fatma Omrani ◽  
Manuela Ferreira ◽  
...  
Keyword(s):  
Mechanical Behaviour ◽  
Areal Density ◽  
Nonwoven Fabric ◽  
Natural Fibre ◽  
Thermoplastic Composites ◽  
Reinforced Composites ◽  
Nonwoven Fabrics ◽  
Composite Scale ◽  
Needle Punching ◽  
Manufacturing Parameters

To date, nonwoven fabrics made with natural fibres and thermoplastic commingled fibres have been extensively used in the composite industry for a wide variety of applications. This paper presents an innovative study about the effect of the manufacturing parameters on the mechanical behaviour of flax/PP nonwoven reinforced composites. The mechanical properties of nonwoven fabric reinforced composites are related directly to the ones of dry nonwoven reinforcements, which depend strongly on the nonwoven manufacturing parameters, such as the needle-punching and areal densities. Consequently, the influence of these manufacturing parameters will be analysed through the tensile and flexural properties. The results demonstrated that the more areal density the nonwoven fabric has, the more the mechanical behaviour can be tested for composites. By contrast, it has a complex influence on needle-punching density on the load-strain and bending behaviours at the composite scale.

The Comparison of Sound Absorption of Kapok-Based Fiber Nonwoven Fabrics

2014 ◽  
Vol 1004-1005 ◽  
pp. 562-565 ◽  
Author(s):  
Xue Ting Liu ◽  
Xiong Yan ◽  
Jie Hong ◽  
Hui Ping Zhang
Keyword(s):  
Sound Absorption ◽  
Function Method ◽  
Natural Fiber ◽  
Frequency Region ◽  
Air Gap ◽  
Polyester Fiber ◽  
Kapok Fiber ◽  
Nonwoven Fabrics ◽  
Transfer Function Method ◽  
Absorbing Materials

As a natural fiber, kapok fiber has the high hollow degree that is very good for sound absorption. Four different kinds of kapok-based fiber nonwoven fabrics, made by kapok fiber mixing with hollow polyester, viscose fiber, PP fiber and cotton fiber respectively, were made and the sound absorption coefficients were measured in the frequency region of 100 - 6300 Hz by using a two-microphone transfer-function method. The comparisons of the sound absorption for four types of materials with similar thickness and densities with no air gap and with 1 cm, 3 cm air gap were made. The results indicate that the sound absorption of kapok/hollow polyester fiber nonwoven fabrics is superior to those of other three ones and kapok/hollow polyester fiber nonwoven fabrics can be used for sound-absorbing materials in engineering.

Mechanical and Electrical Properties of the Polyaniline (PANI)/Polylactic Acid (PLA) Nonwoven Fabric

2013 ◽  
Vol 365-366 ◽  
pp. 1074-1077 ◽  
Author(s):  
Chin Mei Lin ◽  
Ching Hui Lin ◽  
Yu Tien Huang ◽  
Ching Wen Lou ◽  
Jia Horng Lin
Keyword(s):  
Mechanical Properties ◽  
Electromagnetic Wave ◽  
Melting Point ◽  
Polylactic Acid ◽  
Nonwoven Fabric ◽  
Consumer Products ◽  
Layer Number ◽  
Nonwoven Fabrics ◽  
Mechanical And Electrical Properties ◽  
Needle Punching

Technical development and rapid telecommunication create convenient consumer products, but produce electromagnetic radiation that hurts the human body, which makes the development of antistatic and electromagnetic-wave-resistant textiles important. This study combines polylactic acid (PLA) fibers and low melting point polylactic (LPLA) fibers by needle punching to make PLA nonwoven fabrics. The lamination layer number is then changed to explore its influence on the mechanical properties of the PLA nonwoven fabrics. Next, the nonwoven fabrics are spray-coated with polyaniline (PANI) to form the PANI/PLA nonwoven fabrics. The PANI/PLA nonwoven fabric with a lamination layer number of 5 has the optimum tensile and tear strength. A coating of PANI can reduce the surface resistivity.

scholarly journals Development of Needle-Punched Nonwoven Fabrics from Natural Fibers for Sound Absorption Behavior

2021 ◽  
Author(s):  
K Savitha ◽  
Grace S Annapoorani ◽  
V R Sampath
Keyword(s):  
Thermal Conductivity ◽  
Sound Absorption ◽  
Fiber Strength ◽  
Natural Fibers ◽  
Areal Density ◽  
Fiber Layer ◽  
Nonwoven Fabrics ◽  
Sesbania Grandiflora ◽  
Needle Punching ◽  
Needle Punching Machine

: The natural fibers prepared from plant waste have parameters like fiber strength, length, and chemical composition which are suitable to fabric and the fibers into nonwoven. The selected plants were identified from their botanical names by comparing the collected samples with those of known identity in the herbarium of a botanical survey in India with their names as Sesbania grandiflora, Mutingia Calabura, and Bauhinia Purpurea. A novel Portable multi-fibre decorticator machine was fabricated and used to extract the fibers from the plant stem and barks. The extracted fibers are done physical characterization and their properties are investigated. The extracted fibers are blended with other natural fibers like jute and flax in appropriate proportions 45:45:10 and nonwoven fabrics were prepared by the needle-punching method. Three and four-layer nonwovens are produced using a needle punching machine. The developed nonwovens are tested using standard apparatus and the effect of natural fibers in areal density, thickness; bulk density, porosity, and air permeability are analyzed. In addition, thermal conductivity and sound absorption behaviour are also investigated. The sound absorption property increases concerning areal density and fabric thickness. The thermal conductivity increased by increasing the fiber layer in the fabric to evaluate its potential as a protective barrier material in non-woven face masks.

scholarly journals The Influences of Hydrophilic Finishing of PET Fibers on the Properties of Hydroentangled Nonwoven Fabrics

2010 ◽  
Vol 5 (4) ◽  
pp. 155892501000500 ◽  
Author(s):  
Wang Hong ◽  
Pang Lianshun ◽  
Jin Xiangyu ◽  
Yin Baopu ◽  
Wu Haibo
Keyword(s):  
Nonwoven Fabric ◽  
Polyester Fiber ◽  
Nonwoven Fabrics ◽  
Polyester Fibers ◽  
Pet Fibers

Common polyester fibers are hydrophobic in nature. Thus it is hard to process the fibers in the hydroentangled nonwoven process and the resultant nonwoven fabric is hydrophobic as well. In this paper, two kinds of polyester fibers treated with different hydrophilic finishing agents and one common polyester fiber were formed into nonwoven fabrics by using hydroentanglement process. The influences of the hydrophilic and friction properties of the PET fibers on the properties of hydroentangled nonwoven fabrics were studied.

Evaluation on the Sound Absorption and Mechanical Property of the Multi-Layer Needle-Punching Nonwoven

2010 ◽  
Vol 123-125 ◽  
pp. 475-478 ◽  
Author(s):  
Kou Cheng Tai ◽  
Pai Chen ◽  
Ching Wen Lin ◽  
Ching Wen Lou ◽  
Hsiu Mei Tan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Tensile Strength ◽  
Sound Absorption ◽  
Single Layer ◽  
Distinct Difference ◽  
Thermal Bonding ◽  
Needle Punching ◽  
Absorption Performance ◽  
Punching Process

In this research, we used the special needle punching process to improve the disadvantages of the ordinary needle punching process. First, we manufactured the single-layer needle punching nonwoven by the ordinary needle punching process and then nonwovens were laminated followed by needle punching. We carried on this manufacturing processing until the multiple needle-punching nonwoven reached the certain thickness and area weight which were both limited in the ordinary needle punching process. The combination of two manufacture techniques as multiple thermal bonding and multiple needle-punching freed the single needle-punching from the limit of the expected thickness and area density. In this research, we tested the mechanical properties and sound absorption of the multi-layer needle-punching nonwoven and multi-layer thermal bonding nonwoven. According to the results, the tensile strength is higher than the multi-layer thermal bonding nonwoven; however, there was no distinct difference between the multi-layer needle-punching nonwoven and multi-layer thermal bonding nonwoven on the sound absorption performance.

The Effects of Thermal Consolidation Methods on PET Nonwoven Composites for Thermal Insulation Use

2008 ◽  
Vol 55-57 ◽  
pp. 405-408 ◽  
Author(s):  
Ching Wen Lou ◽  
Ching Wen Lin ◽  
Chia Chang Lin ◽  
S.J. Li ◽  
I.J. Tsai ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Energy Consumption ◽  
Thermal Insulation ◽  
Aluminum Foil ◽  
Nonwoven Fabric ◽  
Nonwoven Fabrics ◽  
Available Energy ◽  
Needle Punching ◽  
Thermal Consolidation ◽  
Pet Fibers

As available energy sources have grown increasingly scarce, people have started paying attention to their energy consumption. Although many methods for power generation are being actively investigated, efficient methods for solving energy problems must be based on reducing energy consumption. Thermal insulation can decrease heat energy loss and conserve energy waste, especially in the construction, transportation and industrial fields. In this study, polyester (PET) hollow fibers were blended with various ratios of low-melting-point PET fibers (10%, 20%, 30%, 40% and 50%). The fibers were blended using opening, carding, laying and needle punching (150 needles/cm2, 225 needles/cm2 and 300 needles/cm2) to prepare PET nonwoven fabrics. The PET nonwoven fabrics were thermally plate pressed (TPP) and air-through bonding (ATB). Thermal conductivity, physical properties and air permeability were investigated to identify the influence of manufacturing parameters on the PET nonwoven fabrics. The experimental results show that needle punching density, TPP and ATB would influence the thermal conductivity of PET nonwoven fabric, because the structure of PET nonwoven fabric was changed. The optimal parameters of PET nonwoven fabric clipped with an aluminum foil was used to evaluate the influence of aluminum foil on thermal conductivity. The PET nonwoven composite in this study can be used in industrial thermal insulation applications.

scholarly journals Sound absorption performance of nonwoven fabrics

2021 ◽  
Vol 1896 (1) ◽  
pp. 012008
Author(s):  
I Prasetiyo ◽  
Gunawan ◽  
D R Adhika
Keyword(s):  
Sound Absorption ◽  
Nonwoven Fabrics ◽  
Absorption Performance
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