Strength Of Nonwovens Research Articles

Electrospinning of Poly-3-Hydroxybutyrate Fibers Loaded with Chlorophyll for Antibacterial Purposes.

This work is devoted to the creation of biocompatible fibrous materials with a high antimicrobial effect based on poly-3-hydroxybutyrate (PHB) and chlorophyll (Chl). The data obtained show the possibility of obtaining fibrous materials from PHB and Chl by electrospinning methods. The obtained electrospun matrices were investigated by the SEM, DSC and FTIR methods. Various key properties of the matrices were evaluated, including hydrophilicity and mechanical strength, as well as photodynamic and light-dependent antimicrobial effects against the conditionally pathogenic microorganism Staphylococcus aureus. The results demonstrate a significant improvement in electrospinning properties for a concentration of 0.5% Chl and a reduction in fiber formation defects, as well as an increase in the strength of nonwovens. It was found that the antimicrobial potential of Chl-PHB (with concentrations of Chl of 1.25 and 1.5%) is higher than that of Chl in free form. It was also determined that irradiation increases the inhibitory effect of Chl, both in free form and in the form of a complex with a polymer.

Optimization of Fabric Parameters on the Effectual Properties of Nonwoven Industrial Wipes Blend using Response Surface Methodology

Development in technical in textiles especially nonwoven fabrics/materials offers a brightly limitless prospect for the textile industry to lance into an extensive series of applications ranging from earth to space and beyond. Nonwoven industrial wipes fabric properties are the result of production technology and the combination of fabric constructional parameters. This work looks into the effect of fabric parameters on the desired properties of nonwoven industrial wipes fabricated by needle punching technique with the utilization of viscose and polyester fibres and their blends using RSM. The basic and essential characterization techniques to obtain information related to physiochemical properties of the nonwoven fabrics, using analytical investigation techniques have been evaluated. The results obtained established that the fabric parameters have a great influence on the nonwoven fabric structure and ultimately its properties. The result revealed that higher content of PET fibres led to a reduction in the vertical wicking rate, but better rising height can be achieved at samples made from 100 % of viscose fibres. Also, the influence of pore size and porosity largely influenced the fabric characteristics. The fibre volume fraction on the strength of nonwovens has been studied. The fabricated wipes present themselves as potential candidates for highly absorbent industrial wipes.

Controllable anisotropic properties of wet-laid hydroentangled nonwovens

For nonwovens, fiber orientation distribution is an important structural characteristic that directly influences the anisotropic properties of the materials. Different Vslurry/Vbelt ratios were adopted to fabricate nonwovens during the wet-laid process. The results indicated that fiber orientation distribution of nonwovens can be regulated by adopting different Vslurry/Vbelt ratios owing to the web-forming principle of wet-laid techniques. Mechanical tests showed that both wet and dry tensile strength of nonwovens in different angle directions present anisotropy under different Vslurry/Vbelt ratio parameters. A liquid spreading distribution experiment proved that liquid spreading length and area of nonwovens could be manipulated using different Vslurry/Vbelt ratios in the fabrication process. Therefore, specific anisotropic properties of wet-laid hydroentangled nonwovens can be realized by controlling the process parameters for particular end-use applications.

Investigation of the mechanical and dispersible properties of wood pulp/Danufil wetlaid nonwovens with/without hydroentanglement

A new wiping product prepared by wetlaid/spunlace (wetlace) method possess dispersibility and fully degradability. To obtain the excellent products, the present research first investigates the apparent microstructures, mechanical properties and dispersibility of wood pulp/Danufil wetlaid nonwovens with/without hydroentanglement. The results suggest that fibers are stacked and some of the fiber cohesions occurred on the surface of wetlaid nonwoven. After hydroentanglement, a 3D entanglement skeleton formed by Danufil fibers is found to determine the mechanical and dispersion properties of nonwovens, while wood pulp ensures the dispersion properties and is attributed as the main component of the nonwovens. The breaking extension and tearing strength of nonwovens have been improved significantly and the material with decreasing dispersibility becomes soft. Meanwhile, the dispersion of wetlaid and wetlace nonwovens over time both show linear fitting trend. The increase in content and length-to-diameter (L/D) ratio of Danufil fiber results in the increase in tensile and tearing strength, and the decrease in bending rigidity and dispersion performances of materials. Moreover, the wetlaid nonwovens developed in this study may become promising candidate for the disposable sanitary products.

Contributions of Binder and Fiber to Nonwoven Properties

The contributions of web construction, fiber, binder and interfacial properties. and binder distribution to nonwoven performance were studied. Some of these were found to have no effect on nonwoven strength but to affect modulus and hand. Although adhesive failure has often been regarded as the dominant failure mode. these observations show that the prevalent failure mode was due to the lack of binder cohesive strength. Addition of certain wetting agents, some of which are being used by nonwoven manufacturers, transferred the failure mode of a given binder-fiber combination into an adhesive one.