Parameter Optimization of Intercalated Meltblown Nonwovens Based on NSGA-II

The preparation process parameters of intercalated meltblown nonwoven materials are complicated, and the relationship between process parameters, structural variables, and product performance needs to be investigated to establish a good mechanism for product performance regulation. In this study, we first used Wilcoxon test and Pearson correlation analysis to investigate the effect of intercalation rate on structural variables and product performance. Then, regression models were constructed to predict the values of each structural variable under different combinations of process parameters. Finally, we constructed a multi-objective constrained optimization problem based on the stepwise regression model and the product variable conditions. The problem was solved using the NSGA-II algorithm. The optimal was achieved when the acceptance distance was 2.892 cm and the hot air speed was 2000 r/min.

Surface Treatment of PET Nonwovens with Atmospheric Plasma

In this study, polyethylene-terephthalate （PET） nonwovens are treated using an atmospheric plasma and the effects of the treatment time, treatment power and discharge distance on the ability of water-penetration into the nonwovens are investigated. The result indicates that the method can improve the wettability of PET nonwovens remarkably, but the aging decay of the sample＇s wettability is found to be notable as a function of the storage time after treatment due to the internal rotation of the single bond of surface macromolecules. As shown by SEM and XPS analysis, the etching and surface reaction are significant, and water-penetration weight is found to increase remarkably with the increasing power. This variation can be attributed to momentum transfer and enhanced higher-energy particle excitation.

Preparation and Application of Water Dispersible Graphene as Antistatic Agent for SMS Nonwovens

In this paper, glucose was used as a green reducing agent and a capping reagent in the synthesis of water dispersible graphene, while using exfoliated graphite oxide （GO） as the precursor with the modified Hummers method. Characterizations of the graphene were conducted by UV-visihle absorption spectroscopy and X-ray diffraction （XRD）. Then the spunlaid-melthlowing-spuulaid （SMS） nonwovens were treated with the graphene solution via pad-dry-cure process. The surface and the antistatic property of the obtained nonwovens were tested. The results showed that O. 1 mg/mL graphene solution exhibited good stability in water. When treated with this solution, the graphene could be evenly dispersed on SMS nonwovens and the nonwovens had an excellent antistatic performance and a high relatively antistatic durability.

Graft of Polybutylene Terephthalate Meltblown Nonwovens by Plasma Initiation and Their Surface Performance

Main factors affecting the low temperature plasma initia-tion and graft modification of acrylic acid onto polybuty-lene terephthalate(PBT)meltblown nonwovens are stud-ied.The relations between hydrophilic performance ofthe product and plasma power,treating time,andmonomer concentration are investigated.The surfaceperformances of grafted products are analyzed.It is ob-tained that hydrophilic performance of PBT nonwovens isgreatly improved due to the etching of the plasma andthe introduction of polar groups so as to meet the needsof leukocyte depleting materials.

Visual Evaluation of the Morphologic Structure of Nonwovens Using Image Analysis and Fractal Geometry

Nonwovens are fiber materials which are based on nonwoven technologies. For the complexity and randomness of nonwovens morphologic structures, it is difficult to express them effectively using classical method. Fractal geometry gives us a new idea and a powerful tool to study on irregularity of geometric objects. Therefore, we studied on the pore size, pore shape, pore size distribution and fiber orientation distribution of real nonwovens using fractal geometry combined with computer image analysis to evaluate nonwovens’ morphologic structures.

Plasma Modified Nonwovens for Leukocyte Depletion

Melt blown nonwovens are good filtration media for leukocyte depletion in view of their excellent structures.And the critical wetting surface tension(CWST)of nonwovens media affects the adhesion to leukocytes.The surface modification of polybutylene terephthalate(PBT) melt blown nonwovens is realized by plasma induced and grafted process.Main parameters affecting low temperature plasma inducement and graft modification of acrylicacid onto PBT melt blown nonwovens are studied.

Investigation on Nonwovens Leukocyte Filtering Materials Treated with Amine and Alkali Solution

Filtering materials are chosen according to the mechanism of blood filtration and mathematics model, then the material is treated with amine and alkali solution. There is cooperation and synergism between alkali and amine, and the actions are realized in three stages. After modification the material treated has accessibility groups NH 2 , and slits appeared in the surface of fiber, so the wettability of materials is improved distinctly; the diameter and aperture of fiber have no changes basically.

Effect of Fiber Properties on Nonwovens' Pore Structures with Fractal Geometry Analysis

Nonwovens＇ pore structures are very important to their mechanical and physical properties. And the pore structures are influenced by the fiber properties and fibers arrangement in web. In this paper, the fractal geometry, in combination with computer image anaysis, is used to express the irregularity of pore size distribution in nonwovens, and the effect of fiber properties on fractal dimension of pore size distribution is discussed by using simulated images which are composed of nonlinear staple fibers. The results show that the fiber properties, such as crimp, diameter, angular distribution, and especially the number of fibers prominently influence the pore structure.

Development and Performance Study of CaCO_3 Modified PP Spun-Bonded Nonwovens

The manufacturing process of CaCO3 modified Polypropylene (PP) spun-bonded nonwovens was studied. Then the effect of the additive amount of CaCO3 on mechanical properties of the product was analyzed, and a compatible mechanism between CaCO3 particles and the main component of PP was established. In the end, the mechanical performance of the products was studied when the natural light degradation was changed. The experiment results show that after adding CaCO3 to the PP spun-bonded nonwovens and through the application of complex coupling agent and organic modification, hardcore of rigid particles and polymer composite elastomers can be combined together tightly and disperse rapidly and evenly in the main part of PP. In addition, CaCO3 can catalyze the light degradation of PP spun-bonded nonwovens. The larger the content of CaCO3 is, the faster the light degradation will be.

Investigation of Electrical Stability of Nonwovens with Conductive Circuits Using Printed Conductive Inks

In this work, we study the stability of a class of materials obtained by printing a textile with conductive inks using a method called screen printing. Under the action of a certain external factors, the printed circuit suffers deterioration and the conductivity decreases considerably. In this work, we propose to model the overall damage of the textile sheet in terms of the partial damages of the conductive lines. We also apply this approach to evaluate the damage of a system being made of transmission lines printed into nonwoven substrates using different conductive inks.

VIComprehensive quality solutions for nonwovens

The market for nonwoven products is forecast to continue its growth trend,through both rising world population and the development of innovative products.EDANA(the European Disposables and Nonwovens Association)also sees per capita consumption almost doubling to 1.62 kg in 2020,compared to 0.96 kg in 2009.Demand is especially strong in hygiene,personal care and medical applications– but these end-uses are among the most challenging for producers,with rigorous quality standards typically specifying zero tolerance for defects larger than 1 mm.So,manufacturers aiming to capitalize on this attractive business potential will need to adopt prudent strategies for the removal of contamination and assuring the quality levels their customers require.This is the background to USTER’s expansion of its technology range,with reliable control of contamination before the raw material reaches the fabricmaking processes– and now with the ultimate safeguard of automated checking of the finished fabric at the final inspection stage.This is a comprehensive quality solution,ideal for spunlacing– the process most widely used for medical and hygiene products– but also effective for many other nonwovens manufacturing routes.

DuPont Nonwovens

总部设在美国特拉华州Wilmington，2009年的非织造业务销售额达到12．0亿美元，工厂分别建在美国、卢森堡、西班牙、中国、韩国、巴西。主要市场是建筑材料、医疗、防护服装、工业过滤、家具、土工布、包装材料、鞋用材料、汽车等。

Quality is critical for spunlace nonwovens

USTER~? JOSSI VISION SHIELD removes contamination and minimizes waste When textile products are intended for critical end-uses,there can be no compromises on quality.Nonwovens manufacturers,for example,must deliver the highest levels of quality when supplying fabrics for medical,personal care and hygiene applications.These products must both look and feel virtually perfect,to meet the expected standards for cleanliness and comfort,especially when they come into contact with human skin in use.

Three-Dimensional Model Reconstruction of Nonwovens from Multi-Focus Images

The three-dimensional(3D)model is of great significance to analyze the performance of nonwovens.However,the existing modelling methods could not reconstruct the 3D structure of nonwovens at low cost.A new method based on deep learning was proposed to reconstruct 3D models of nonwovens from multi-focus images.A convolutional neural network was trained to extract clear fibers from sequence images.Image processing algorithms were used to obtain the radius,the central axis,and depth information of fibers from the extraction results.Based on this information,3D models were built in 3D space.Furthermore,self-developed algorithms optimized the central axis and depth of fibers,which made fibers more realistic and continuous.The method with lower cost could reconstruct 3D models of nonwovens conveniently.

VDMA:German Technology meets Indian Textiles and Nonwovens——Visitor registration is now open

DDecision-makers from the Indian textile and nonwoven industry are warmly invited to register under www.germantech-indiantextile.de for the next VDMA Textile Machinery Conference and B2B-Forum from 15th to 16th May 2018 in Mumbai(Hotel The Leela).Registration is mandatory.The VDMA will bear organizational costs(no entrance fee).Deadline for registration:April 30th,2018.

Strike hard to maintain the order of the melt blown nonwovens market

According to media reports,since the outbreak of the pandemic,as an important raw material for masks,the market price of melt blown nonwovens has entered a rapid jump channel.Many capitals have tried to enter upstream and downstream industries of the production of masks,in the short term,the melt blown nonwovens industry has experienced abnormal phenomena such as a surge in enterprises and a surge in prices.

Global demand for filtration nonwovens expected to grow by 2.7 percent per year

In recent years,filtration nonwovens have been widely used in industrial filtration,protection,medical and other fields.The demand for nonwovens in the application field of filtration materials will increase by 2.7 percent annually by 2024,according to the latest forecast issued by the international industrial research organization Freedonia Group.The growth is mainly driven by four factors.The first is the continuous development of advanced nanofiber technology.Advanced nano-fiber technology makes nonwovens more competitive with alternative materials such as membranes.

Green Fabrication of Multifunctional Three‑Dimensional Superabsorbent Nonwovens with Thermo‑Bonding Fibers

Disposable hygiene products have evolved into the important parts for millions of people around the world,enhancing the convenience of daily lives.However,development of the disposable hygiene products is restricted by unsustainable production technology,complicated operation process,and poor liquid absorption performance of the absorbent core.Herein,integrated and three-dimensional(3D)multifunctional superabsorbent nonwovens with liquid-triggered fragrance release was prepared via green,fast and scalable multi efect hot-air anchoring method which physically crosslinking the joint thermobonding fbers and anchoring fragrance microcapsules/super absorbent polymer(SAP)onto adjacent thermo-bonding fbers simultaneously.The resulting composite nonwovens could three-dimensionally absorb water 33.14 times of its own weight without gel blockage between SAP,and correspondingly release increased intensity fragrance along with enhancing amount of water absorption.Absorption rate t1 and t2 is 83.62%and 50.62%higher than the commercial specimen respectively,and the air permeability is increased by 226.88%compared with the commercial specimen.The superabsorbent nonwovens with controllable fragrance release and odorant synergistic has the potential to be practically applied to functional textiles felds because of the excellent liquid absorption and controlled fragrance release performance,and is easy to be produced on a sustainable,pollution-free and large-scale industrial production.

Exosomes of adult human fibroblasts cultured on 3D silk fibroin nonwovens intensely stimulate neoangiogenesis

Background:Bombyx mori silk fibroin is a biomacromolecule that allows the assembly of scaffolds for tissue engineering and regeneration purposes due to its cellular adhesiveness,high biocompatibility and low immunogenicity.Earlier work showed that two types of 3D silk fibroin nonwovens(3D-SFnws)implanted into mouse subcutaneous tissue were promptly vascularized via undefined molecular mechanisms.The present study used nontumorigenic adult human dermal fibroblasts(HDFs)adhering to a third type of 3D-SFnws to assess whether HDFs release exosomes whose contents promote neoangiogenesis.Methods:Electron microscopy imaging and physical tests defined the features of the novel carded/hydroentangled 3D-SFnws.HDFs were cultured on 3D-SFnws and polystyrene plates in an exosome-depleted medium.DNA amounts and D-glucose consumption revealed the growth and metabolic activities of HDFs on 3D-SFnws.CD9-expressing total exosome fractions were from conditioned media of 3D-SFnws and 2D polystyrene plates HDF cultures.Angiogenic growth factors(AGFs)in equal amounts of the two groups of exosomal proteins were analysed via doubleantibody arrays.A tube formation assay using human dermal microvascular endothelial cells(HDMVECs)was used to evaluate the exosomes’angiogenic power.Results:The novel features of the 3D-SFnws met the biomechanical requirements typical of human soft tissues.By experimental day 15,3D-SFnws-adhering HDFs had increased 4.5-fold in numbers and metabolized 5.4-fold more D-glucose than at day 3 in vitro.Compared to polystyrene-stuck HDFs,exosomes from 3D-SFnws-adhering HDFs carried significantly higher amounts of AGFs,such as interleukin(IL)-1α,IL-4 and IL-8;angiopoietin-1 and angiopoietin-2;angiopoietin-1 receptor(or Tie-2);growth-regulated oncogene(GRO)-α,GRO-βand GRO-γ;matrix metalloproteinase-1;tissue inhibitor metalloproteinase-1;and urokinase-type plasminogen activator surface receptor,but lesser amounts of anti-angiogenic tissue inhibitor metalloproteinase-2 and pro-inflammatory monocyte chemoattractant protein-1.At concentrations from 0.62 to 10μg/ml,the exosomes from 3D-SFnws-cultured HDFs proved their angiogenic power by inducing HDMVECs to form significant amounts of tubes in vitro.Conclusions:The structural and mechanical properties of carded/hydroentangled 3D-SFnws proved their suitability for tissue engineering and regeneration applications.Consistent with our hypothesis,3D-SFnws-adhering HDFs released exosomes carrying several AGFs that induced HDMVECs to promptly assemble vascular tubes in vitro.Hence,we posit that once implanted in vivo,the 3DSFnws/HDFs interactions could promote the vascularization and repair of extended skin wounds due to burns or other noxious agents in human and veterinary clinical settings.

Efficient and selective removal of Pb(Ⅱ) from landfill leachate using L-serine-modified polyethylene/polypropylene nonwoven fabric synthesized via radiation grafting technique

In this study,to efficiently remove Pb(Ⅱ) from aqueous environments,a novel L-serine-modified polyethylene/polypropylene nonwoven fabric sorbent(NWF-serine)was fabricated through the radiation grafting of glycidyl methacrylate and subsequent L-serine modification.The effect of the absorbed dose was investigated in the range of 5–50 kGy.NWF-serine was characterized by Fourier transform infrared spectroscopy,thermogravimetric analysis,and scanning electron microscopy.Batch adsorption tests were conducted to investigate the influences of pH,adsorption time,temperature,initial concentration,and sorbent dosage on the Pb(Ⅱ) adsorption performance of NWF-serine.The results indicated that Pb(Ⅱ) adsorption onto NWF-serine was an endothermic process,following the pseudo-second-order kinetic model and Langmuir isotherm model.The saturated adsorption capacity was 198.1 mg/g.NWF-serine exhibited Pb(Ⅱ) removal rates of 99.8% for aqueous solutions with initial concentrations of 100 mg/L and 82.1% for landfill leachate containing competitive metal ions such as Cd,Cu,Ni,Mn,and Zn.Furthermore,NWF-serine maintained 86% of its Pb(Ⅱ) uptake after five use cycles.The coordination of the carboxyl and amino groups with Pb(Ⅱ) was confirmed using X-ray photoelectron spectroscopy and extended X-ray absorption fine structure analysis.