非织造布

965228牡邦的抗菌水刺非织造布勘nwovens Rep.xntern.,1995,(295),p.11(英)杜邦的水刺非织造布系列中增加了一只品种—抗菌非织造布。此非织布采用的原料是courtaulds公司的Lyocell纤维和抗菌纤维,或者是丙烯睛类纤维或是酷醋纤维。它具有水刺非织布的柔软特性,适用于医药、成人失禁用品、揩布和各种医院用品。采用Courtaulds公司的Lyoeell纤维生产非织布,可用低至中等的压力进行粘合,所得非织布强力高且稳定。并且具有丝稠的外观。此产品在湿态时不变形,毛细孔吸湿行为不受影响。在生产非织布的过程中,Lyocen纤维网将产生原纤化现象。它…     

用途极为广泛的产品——纺粘法非织布

<正> 一 引言 本文主要介绍纺粘法非织布的各种用途,进而深入讨论它的工艺。 非织布的原理如下: 非织布的生产总是从一种未经处理的或原始的“网”开始的。通常,这种网的单根纤维之间粘合力很低,仅仅依靠纤维的卷曲和纤维间的缠结,由于这个原因,这种丝网没有实际用途。因此,第二阶段必须采用各种工艺使上述丝网强化。     

聚酯——聚乙烯共混纤维研究

探讨了PET与不同分子量的高密度聚乙烯和低密度聚乙烯共混体的流变性能、可纺性以及共混纤维的形态结构与性能。结果表明,[η]=0.65的PET与[MI]=6.9的HDPE的共混体的可纺性较好,纺成的纤维具有以PE为海、PET为岛的海—岛型形态结构,经90℃拉伸5倍和100℃热处理后,PE高度结晶,而其中的PET仍处于非晶态。这样的纤维具有较好的力学性能,制成的非织布试样在140℃进行处理,PE皮层发生熔融粘接,PET微纤发生结晶,控制收缩,保持纤维形态。     

玻璃纤维机织布水刺复合聚四氟乙烯纤维过滤毡

本实用新型一种玻璃纤维机织布水刺复合聚四氟乙烯纤维过滤毡,在玻璃纤维机织布上铺有一层聚四氟乙烯PTFE纤维面层。本实用新型的优点是提高了过滤性能和耐酸碱腐蚀性能,同时增强了耐磨和耐折性能;     

低熔点粘结纤维——乙纶及其用途

<正> 随着热粘法非织布生产工艺的诞生和发展,出现了专门供热粘法非织布生产工艺需要的粘结纤维,如日本生产的ES纤维、索非特纤维等,均属此类纤维。这些纤维一般具有熔点低、粘结力强,用其生产的织物手感柔软等特点。     

亚麻增强热塑性树脂复合材料板材的研究与应用

以亚麻纤维为增强体,与聚丙烯(PP)纤维按一定比例进行混合,然后制备加捻纱及PP长丝包覆的包覆纱,并利用机织工艺织成二维机织布作为复合材料的预制铺层.采用层合热压方法制备PP/亚麻纤维复合材料板材.通过对板材弯曲性能的测试及分析,研究了制备工艺、纱线结构及亚麻纤维含量等因素对复合材料弯曲性能的影响.     

芳纶纤维浸胶帆布的开发与生产

测试活化芳纶工业丝的基本物理性能并对其进行捻线、织布、浸胶等工艺处理制成EPP1250-1350芳纶纤维浸胶帆布,进行成品性能检测。结果表明:活化芳纶工业丝有较高的强力和模量、良好的热稳定性;EPP1250-1350芳纶纤维浸胶帆布的外观与物理性能均良好;芳纶纤维浸胶帆布作为输送带浸胶骨架材料的优势包括成槽性好、使用寿命长、接头耐久性能好、轻量化、阻燃性能优异等。     

纤维性能及工艺参数对用双组份聚酯纤维粘合制造的高膨松性非织造布性能的影响

本文采用双组份热熔聚酯纤维粘合法制得高膨松性非织造布,讨论了所用纤维性能及加工工艺参数对非织布力学性能的影响;并探讨了利用双组份热熔纤维粘合法生产非织造布的工艺参数的选择,结果表明对于皮层熔点低的双组份纤维其加工温度范围较宽;而对皮层熔点高的双组份纤维最佳加工温度约比其高15℃。     

非织造布

20034305制造湿法成网非织造布的新型PP纤维Chemieal Fibers International,2001,51,(6),P.431(英)FiberVisions in Create WL PP纤维的纤度为1.7一3.3,纤维长度为3、4、6、8、和12mm。公司的挤出技术确保纤维均匀,提高了纤维在湿态下的分裂性。FiberVisions的皮芯双组份聚丙烯/聚乙烯纤维用于制造湿法成网非织布。AL一Adhesion双组份纤维能与纤维素纤维很好粘合。AL一Lowmelt双组份纤维的熔点为95℃。(李哗)非织造布聚丙烯纤维新产品双组份 30034306聚对苯二甲酸丙二醋基双组份熔喷非织布的性能和开发Zhang Dong…:Journal ofAP…     

磁性功能纤维

全面阐述了磁性纤维,包括磁性纺织纤维和磁性非纺织纤维的各种制备方法及磁性纤维的应用.其中包括新型磁性腈纶和磁性维纶的性能及由它们制成的保健品的治疗效果.     

Mechanical properties of surface modified jute fiber/polypropylene nonwoven composites

In this study, the jute/polypropylene nonwoven reinforced composites were prepared using film stacking method. The surface of jute fibers was modified using alkali treatment. These alkali treated jute fiber nonwoven composites were analyzed for their tensile and flexural properties. Increasing the amount of jute fibers in the nonwovens has improved the mechanical properties of their composites. The effect of stacking sequence of preferentially and nonpreferentially aligned nonwovens within the composites was also investigated. The flexural and tensile moduli of composites were found to be significantly enhanced when nonwovens consisting of preferentially and nonpreferentially aligned jute fibers were stacked in an alternate manner. The existing theoretical models of tensile modulus of fiber reinforced composites have been analyzed for predicting the tensile modulus of nonwoven composites. In general, a good agreement was obtained between the experimental and theoretical results of tensile modulus of nonwoven composites. POLYM. COMPOS., 35:1044–1050, 2014. © 2013 Society of Plastics Engineers     

Determining certain structural parameters of nonwovens in order to modify them

A model constructed of layered rods (fibers) is used to determine the dependence of the contact area between the fibers of thermofastened nonwovens on their packing density after thermofastening. Statistical methods of analysis and structural models of thermofastened nonwovens are used to show that the number of contacts is quadratically related to surface density and linearly related to fiber packing density. The relations that are obtained make it possible to determine the active fiber surface which is accessible for modification by nanosized particles.     

Electrospun nonwovens of shape‐memory polyurethane block copolymers

Synthesized shape‐memory polyurethane (PU) block copolymers were used to prepare electrospun nonwovens via electrospinning. PU solutions were prepared with a mixed solvent of N,N‐dimethylformamide and tetrahydrofuran. The electrospun PU nonwovens were prepared with hard‐segment concentrations of 40 and 50 wt %. The morphology of the electrospun fibers was investigated with scanning electron microscopy. The average diameter of low‐viscosity (ca. 130–180 cPs) electrospun fibers was about 800 nm, and the morphology of the electrospun nonwovens was beaded‐on fibers. In contrast, the average diameter of high‐viscosity (ca. 530–570 cPs) electrospun fibers was about 1300 nm. In an investigation of the mechanical properties of the electrospun PU nonwovens, it was found that the tensile strength increased as the hard‐segment concentration increased within a similar range of viscosities. Also, the tensile strength of the electrospun PU nonwovens in the machine direction was higher than that in the transverse direction because of a difference in the velocities of the drum collectors. The electrospun PU nonwovens with hard‐segment concentrations of 40 and 50 wt % were found to have a shape recovery of more than 80%. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 460–465, 2005     

Electrospun fibers from functional polyglycidol/poly(ε-caprolactone) blends with defined surface properties

Highly hydrophilic but water insoluble fibers from star-shaped poly(ethoxyethyl glycidyl ether) and poly(ε-caprolactone) polymer blends in the submicron range were prepared using the electrospinning technique. The fibers were achieved in a smooth and homogeneous manner and do show tremendous decreased protein adsorption. Additionally, using alkyne- or vinyl sulfonate end capped polymer, fibers with the correspondent surface reactivity have been prepared. All fibers showed high biocompatibility and were highly hydrophilic but water stable. Furthermore, nonwovens based on functionalized poly(ethoxyethyl glycidyl ether) were equipped with small biofunctional molecules, e.g., the peptide sequence glycine-arginine-glycine-aspartate-serine (GRGDS). These fibers showed increased cell attachment compared with nonfunctionalized nonwovens. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

玻璃纤维非织造布

非织造布是用化学、机械、加热或溶剂处理方式把纤维交缠形成的织物状材料。国际上的玻璃纤维非织造布在玻璃纤维产品中占有较大比例,应用范围颇广。文中讲述了玻璃纤维非织造布的主要类型及它们的应用范围和市场动态,借此展示玻璃纤维的宽泛用途和强大生命力。     

Melt-spun poly(lactic acid) fibers modified with soy fillers: Toward environment-friendly disposable nonwovens

Poly(lactic acid) (PLA) has a significant potential as a biodegradable polymer, but its high cost and slow biodegradability restrict its use in disposable products. This study establishes a novel route to accomplish both objectives by the addition of low-cost soy fillers into PLA, which reduced material cost and increased the degradation rate of resulting soy-PLA fibers. Due to partial thermal degradation of soy fillers at PLA melt temperature, they could be melt-compounded into PLA up to 5 wt%. Fine continuous fibers (D ∼ 25-50 μm) were successfully produced via melt spinning, and further melt-consolidated into prototypical nonwovens. The tensile strength of soy-PLA fibers containing soy reside and soy flour were 56 ± 9 and 44 ± 5 MPa, respectively. Although slightly lower than that of neat PLA fibers (74 ± 2 MPa), the fibers possessed adequate tenacity for use as nonwoven fabrics. Fiber modulus remained unaffected at about 2.5 GPa. The soy-PLA fibers displayed a relatively rough exterior surface and provided a natural-fiber feel. The overall degradation of soy-PLA fibers was accelerated about 2-fold in a basic medium due to the preferential dissolution of soy that led to increased surface area within the PLA matrix indicating their potential for use in biodegradable nonwovens.     

静电纺聚酰亚胺非织造布的制备与表征

以N,N-二甲基乙酰胺(DMAc)为溶剂,3,3',4,4'-二苯醚四甲酸二酐(ODPA)和4,4'-二氨基二苯醚(ODA)为单体,利用高压静电纺丝技术,制备了聚酰胺酸(PAA)和聚酰亚胺(PI)非织造布,并采用扫描电镜(SEM)对PAA及PI非织造布的表面形态进行表征,研究了PI非织造布的力学性能。结果表明:经300℃热亚胺化处理得到的PI非织造布,纤维平均直径减小到500nm以下,纤维的带状形貌与PAA明显不同,并且出现了收缩、弯曲等现象。静电纺丝法制得的PI非织造布的力学性能仍然比较优越。     

Wetting behavior of thermally bonded polyester nonwoven fabrics: The importance of porosity

The wetting properties of thermally bonded polyester nonwoven fabrics with different basis weights were studied. These nonwovens had the same composition: 85% poly(ethylene terephthalate) and 15% poly(butylene terephthalate) fibers. Two techniques, the 3S wicking test and sessile drop method, yielded similar water contact angles for all the nonwovens, but these results differed from the values obtained with the single fibers. In the nonwoven fabrics, the pore structure played a dominant role in the wetting properties: the existence of large pores in the thinner nonwovens reduced the dimensions of the liquid–solid interfacial perimeter. Compared with the water contact angle of the constituent single fibers, the contact angle of the fabrics was increased. A crenellated surface model was created to quantify the influence of pores on the wettability of nonwovens. It was possible to deduce the surface porosity of the fabric with this model, but only in the case of contact with nonwetting liquids such as water: this surface porosity corresponded only to the outermost layers of the fabric structure. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 387–394, 2006     

Simulating permeability of 3-D calendered fibrous structures

Many fibrous materials such as nonwoven materials are often consolidated by means of hot calenders, i.e., hot compaction rolls. Hot calendering compresses the fiber assembly and can cause changes in the structure. In nonwovens, calendering has an added function of thermally bonding the fibers at their respective crossovers to form a strong but yet somewhat porous material. Calendering causes a significant increase in the solid volume fraction (SVF) of the media and therefore, affects their permeability. To our knowledge, no work in the literature has been dedicated to modeling the permeability of calendered nonwovens. In this study, virtual nonwoven structures are generated and compressed from top and bottom to resemble the hot calendering process. In agreement with our experimental observations, it was found that the average SVF profile across the material's thickness turns into a U-shape profile after the calendering. In this work, the dimensionless permeability of the calendered media is computed using CFD tools and reported for different compaction ratios. Results of our simulations are compared with the experiment as well as the available empirical and/or analytical permeability models in the literature and good agreement, depending upon the SVF, is observed. We also studied the influence of orientation distribution of the fibers on the dimensionless permeability of the fabric and noticed that permeability decreases by increasing the directionality of the fibers. This is found to be primarily due to the fact that highly oriented uncompressed fiber-webs tend to have a higher SVF. Fiber-webs of identical SVF, however, exhibited almost identical permeabilities regardless of their fiber orientations.     

Dependence of the liquid absorption behavior of nonwovens on their material and structural characteristics: Modeling and experiments

Nonwovens are widely used as liquid absorbent products. Baby diapers, sanitary napkins, adult incontinence pads, oil sorbents, wet wipes, and wound dressings, to name a few, are excellent examples of the use of nonwovens as absorbent media. The performance of nonwoven absorbent media is determined by its liquid absorption behavior, which is characterized by the capacity of absorption and the rate of absorption. In this article, we report on the effects of the physical characteristics of the constituent fibers and the internal structure of the nonwovens on their liquid absorption behavior. A theoretical model of liquid absorption behavior of nonwovens was developed, and this model was verified with a set of experimental results obtained on real nonwoven materials. The nonwoven materials were prepared with polyester fibers with different cross‐sectional sizes and their liquid absorption properties were measured with the gravimetric absorbency testing system. We observed that the size of fiber cross sections and the porosity of the nonwovens played very important roles in determining their absorbent capacity and rate of absorption. The results of the experiments were discussed in light of the theoretical model. The theoretical results were found to be in good agreement with the experimental results. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012