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.

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.

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 on the test method of rupture forces of thermal bonding seams in nonwovens shopping bags

超声波热黏合的非织造布接缝不同于普通机织物和针织物等的车缝接缝。运用正交试验设计方法，对纺粘法PP非织造布购物袋热黏合接缝断裂强力测试中的试样宽度、拉伸速率和隔距三个因素进行优化。试验结果表明，试样宽度对纺粘法PP非织造布热黏合接缝断裂强力的测试结果影响最大，并且接缝的断裂强力随着试样宽度的增加而增加。选用试样宽度为200mm、拉伸速率为50mm／min、隔距为100mm的组合所得出的测试结果能比较真实地反映实际的接缝断裂强力。

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.

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.

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。

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.

熔喷专用茂金属聚丙烯的中试开发

在75 kg/h Spheripol工艺聚丙烯中试装置上,使用茂金属聚丙烯催化剂开发出熔喷专用茂金属聚丙烯MPH1500Y,并进行了熔喷无纺布的加工应用研究,同时对驻极处理的熔喷无纺布性能进行分析。结果表明:MPH1500Y的熔体流动速率约为1500 g/10 min,相对分子质量分布为2.9;MPH1500Y在加工应用过程中可纺性好,喷出、成网、收卷顺利,熔喷无纺布的纤维结构蓬松、形态均匀且细长,添加驻极母粒并经静电驻极处理后有效提高了熔喷无纺布的过滤效率,改善了熔喷无纺布的加速老化性能。

新工科背景下非织造学课程思政探索与实践

《非织造学》是纺织工程专业骨干课程之一,对学生专业知识体系的建立具有重要作用。将课程思政融入非织造学课程建设,对于知识传授和价值引领双重目标的实现,以及综合素质过硬人才的培养具有重要意义。本研究对《非织造学》课程中所涉及思政元素进行了深度挖掘,对教学设计与实施、课程评价体系进行梳理,旨在助力学生在掌握《非织造学》专业知识的同时,对学生进行思想政治品德教育,实现高校立德树人的育人根本任务。