Mechanical behavior of flax/polypropylene commingled nonwoven at dry scale: Influence of process parameters

2018 ◽  
Vol 89 (5) ◽  
pp. 791-800 ◽  
Author(s):  
Imen Gnaba ◽  
Fatma Omrani ◽  
Peng Wang ◽  
Damien Soulat ◽  
Manuela Ferreira ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Nonwoven Fabric ◽  
Material Surface ◽  
Light Weight ◽  
Influence Of Process Parameters ◽  
Bending Tests ◽  
Nonwoven Fabrics ◽  
Reinforced Composite ◽  
Needle Punching

Currently, nonwoven fabrics made with natural and thermoplastic commingled fibers have been extensively used in the composite industry due to their light weight and low processing and material costs. As two key parameters in the manufacturing of nonwoven fabrics, the needle-punching and material surface densities influence strongly the mechanical properties of nonwoven fabrics and their reinforced composite parts. Compared to most studies focused on the composite stage, the present experimental investigation is performed at the dry fabric stage, and the influence of the needle-punching and material surface densities on the mechanical behavior of nonwoven fabrics will be analyzed through tensile and bending tests. The results show that increasing the material surface of the nonwoven fabric leads to a better mechanical behavior, but that such variations do not modify the phenomenon of anisotropy of nonwoven fabrics. By contrast, increasing the needle-punching density can strengthen generally the homogeneity of nonwoven fabrics.

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.

Manufacturing Technique and Mechanical Properties of Environment-Protective Composite Nonwoven Fabrics

2011 ◽  
Vol 287-290 ◽  
pp. 2673-2676 ◽  
Author(s):  
Jia Horng Lin ◽  
An Pang Chen ◽  
Jan Yi Lin ◽  
Ting An Lin ◽  
Ching Wen Lou
Keyword(s):  
Mechanical Properties ◽  
Nonwoven Fabric ◽  
Ecological Environment ◽  
International Economy ◽  
Nonwoven Fabrics ◽  
Needle Punching ◽  
Recycled Fiber ◽  
Lyocell Fiber ◽  
Composite Nonwoven ◽  
Manufacturing Parameters

Ecological environment deteriorates drastically and rapidly, which can be ascribed to the fast advancement of international economy and technique. Hence, people become green consumers, using green products. The series of lyocell fiber, called as recycled fiber, has been pervasively used. This study used Tencel® fiber, Polylactic Acid (PLA) fiber and high absorbent fiber as well as nonwoven manufacturing, creating Tencel®/PLA/HAF composite nonwoven fabrics. Among the manufacturing parameters, an increase in Tencel® fiber ratio, needle-punching density and basis weight all contributed to heighten the mechanical properties of nonwoven fabrics. In particular, the Tencel®/PLA/HAF composite nonwoven fabric exhibited an optimum tensile strength of 68.8 N and bursting strength of 193.7 N when Tencel® fiber ratio was over 80 wt%, basis weight was 200 g/m2 and needle-punching density was 300 needle/cm2.

Investigation on the mechanical behavior of areca sheath fibers/jute fibers/glass fabrics reinforced hybrid composite for light weight applications

2018 ◽  
Vol 49 (8) ◽  
pp. 1036-1060 ◽  
Author(s):  
S Jothibasu ◽  
S Mohanamurugan ◽  
R Vijay ◽  
D Lenin Singaravelu ◽  
A Vinod ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Core Layer ◽  
Skin Layer ◽  
Woven Fabric ◽  
Jute Fiber ◽  
Deformation Analysis ◽  
Light Weight ◽  
Fiber Glass ◽  
Jute Fibers

Hybrid polymeric composites are gaining important consideration with versatile applications due to their good mechanical properties. The present study is an attempt to evaluate the hybridization effects of different laminate stacking sequence involving areca sheath fiber/jute fiber/glass-woven fabric through the study of mechanical properties of four different resulting composites. The fibers were alkali-treated and were used in composites fabrication that was done using the hand lay-up method. This assessment of mechanical properties and study of fractured surfaces indicated a significant improvement in mechanical properties of the composites with jute fiber as intermittent layers, areca sheath fiber as a core layer, and glass fabrics as skin layer reinforced epoxy composites. An attempt to prove the application suitability of “L” frame for flower stand application was fabricated using the best mechanical behavior performer composite, and the ANSYS (deformation) analysis was also performed.

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.

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.

Evaluation of Mechanical Properties of Dimpled PET Fiber Fabricated by Electrospinning Method

2018 ◽  
Vol 940 ◽  
pp. 8-14
Author(s):  
Kazuto Tanaka ◽  
Ryota Kawasaki ◽  
Tsutao Katayama ◽  
Yusuke Morita
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stent Graft ◽  
Porous Scaffold ◽  
Fiber Surface ◽  
Nonwoven Fabric ◽  
Nonwoven Fabrics ◽  
Electrospinning Method ◽  
Pet Fibers ◽  
High Humidity Environment

Insufficient endothelialization of stent grafts tends to cause a problem of thrombosis formation. Because the structure of nanofibers, generally defined as fibers with a diameter below 1 μm, resembles the structure of an extracellular matrix, nanofibers are applied to scaffolds for regenerative medicine. Using nanofibers as the covering material of the stent graft can be expected to solve the problem of the stent graft. Previous studies have shown that a porous scaffold offers better surfaces to anchor and culture endothelial cells than a nonporous scaffold. Therefore, fibers with nanoorder dimples are expected to promote endothelialization. As a method of forming the dimple shape on the surface of the PET fiber, there is a method utilizing a difference in the volatilization rate of the solvent in the high humidity environment in the electrospinning method. For practical application of the stent graft to artificial blood vessels, the mechanical properties of the dimpled PET fiber should be clarified. In this study, the mechanical properties of single nanofibers and nonwoven fabrics of PET fibers with dimples on their surface were evaluated by tensile test. By forming the dimple shape on the fiber surface, the tensile strength of single PET fibers with dimples was 90 % lower than that of single PET fibers with a smooth surface. In the fabrication process of nonwoven fabric, the addition of EG delayed the volatilization of the PET solution, and the fibers adhered to each other. The bonding between the fibers contributed to the tensile strength of the nonwoven fabric.

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 The effect of lamina configuration and compaction pressure on mechanical properties of laminated gigantochloa apus composites

2021 ◽  
Vol 6 (12 (114)) ◽  
Author(s):  
Parlindungan Manik ◽  
Agus Suprihanto ◽  
Sri Nugroho ◽  
Sulardjaka Sulardjaka
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Compaction Pressure ◽  
Resin Matrix ◽  
Bending Tests ◽  
Astm Standard ◽  
Reinforced Composite ◽  
Laminated Bamboo ◽  
Matrix Fracture ◽  
Reinforced Composite Material

This study aims to investigate the mechanical properties of bamboo apus (gigantochloa apus) as a natural reinforced composite material. Bamboo’s laminates of gigantochloa apus were used as reinforcement on the epoxy resin matrix. The parameters examined in this study are the configuration of lamina and compaction pressure. Laminate configuration varies in the number, thickness and direction of the lamina. Compaction pressures of 1.5 MPa, 2 MPa, and 2.5 MPa were used to fabricate the Laminated Bamboo Composites (LBCs). The stem of bamboo with a length of 400 mm was split to obtain bamboo lamina with a size of 400×20 mm. The thickness of bamboo lamina is varied between 1 mm, 1.5 mm, and 2 mm. The bamboo lamina is then preserved by watering it with a preservative solution in the form of 2.5 % sodium tetraborate solution and dried in an oven until the water content reaches 10 %. LBCs were made with a hand lay-up method. After the LBCs were molded, they were pressed with 3 variations of dies compaction 1.5 MPa, 2 MPa and 2.5 MPa. The tensile and bending tests were carried out on the LBCs. Tensile testing is performed in accordance with ASTM standard D3039 and the bending tests were conducted based on ASTM standard D7264. The results show that at each compaction pressure, the highest tensile and bending strength was achieved by LBCs with a thickness of 1 mm of bamboo lamina and 7 layers of bamboo laminates. The LBC with thinner bamboo lamina reinforcement and more layers has the highest tensile strength and bending strength, even it has a lower mass fraction. The LBCs with laminates oriented 0° exhibited greater tensile and bending strengths than the LBCs with laminates structured –45°/+45° and 0°/90°. The LBCs with the 0° laminates direction is matrix fracture followed by lamina fracture. In the 0°/90° direction, matrix fracture is followed by delamination in the 90° and 0° laminates direction. Delamination and lamina clefting were observed in LBCs with laminates oriented +45°/–45°.

scholarly journals The Influence of Non-Uniformities on the Mechanical Behavior of Hemp-Reinforced Composite Materials with a Dammar Matrix

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1232 ◽  
Author(s):  
Dumitru Bolcu ◽  
Marius Marinel Stănescu
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Mechanical Behavior ◽  
Structural Changes ◽  
Quality Factors ◽  
Hybrid Resin ◽  
Reinforced Composite ◽  
Strain Stress ◽  
Reinforcing Material ◽  
Hemp Fabric

As a result of manufacture, composite materials can appear to have variations to their properties due to the existence of structural changes. In this paper, we studied the influence of material irregularity on the mechanical behavior of two categories of bars for which we have used hemp fabric as a reinforcing material. The common matrix is a hybrid resin based on Dammar and epoxy resin. We molded two types of bars within each of the previously mentioned categories. The first type, also called “ideal bar”, was made of layers in which the volume proportion and the orientation of the reinforcing material was the same in each section. The ideal bar does not show variations of mechanical properties along it. The second type of bar was molded to have one or two layers where, between certain sections, the reinforcing material was interrupted in several segments. We have determined some mechanical properties, the characteristic curves (strain-stress), the tensile strength, and elongation at break for all the sample sets on trial. Moreover, we have studied the influence of the non-uniformities on the mechanical behavior of the composites by entering certain quality factors that have been calculated after experimental determinations.

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.

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