复合纤维及异形纤维

995231专业化使Hins公司成为双组分纤维设备、工艺技术方面的领先者Hagewood J.;International Fiber Journal,1998,13,(6),p .54一55(英)自80年代初期以来,以弗洛里达州为基地的Hills公司开发了双组分纤维设备并形成了工业化生产。设备生产厂在所有熔融纺的应用上提供了先进的双组分技术,包括在短纤维、长丝、纺粘法和熔喷法的应用。近来,可用的设备包括生产未牵伸丝、部分牵伸丝、全牵伸丝和/或牵伸变形丝的纺丝设备;熔体喷射模头;生产门幅为0.5米双组分纺粘法无纺布织物的完整生产线和单丝纺丝和拉伸生产线。在不远的将来,Hills公司…     

橘瓣型双组分非织造材料的开纤技术及过滤性能

介绍了双组分超细纤维的生产方法以及各自的特点;对比了橘瓣型纤维和海岛型双组分纤维非织造材料的生产技术;详述了橘瓣型双组分非织造材料的开纤方法,探讨了各种开纤工艺的优势和不足;分析了橘瓣型双组分非织造材料在过滤领域应用的可行性。指出随着熔喷和静电纺丝超细纤维过滤材料的应用以及过滤材料和超细纤维结构的研究深入,橘瓣型双组分非织造材料在过滤领域的应用将进一步拓宽。     

复合纤维及异形纤维

20062214双组分熔喷纤维剥离的初步研究Sun C.…;Journal of Applied Polymer Science,2004,93(5),p.2090(英)在田纳西大学纺织和非织造布发展中心(TANDEC)的RE1COF1L双组分(bico)熔喷流水线上开发了以聚丙烯(PP)、聚乙烯(PE)、聚对苯二甲酸乙二酯(PET)、聚对苯二甲酸丁二酯(PB     

聚丙烯纤维现状及发展趋势

综述了聚丙烯(PP)长纤维、短纤维、纺黏无纺布及熔喷无纺布的生产工艺及设备.分析了不同品种的PP纤维对PP树脂性能的要求.多功能纤维、双组分纤维、异型纤维、高强纤维等是今后PP纤维的发展趋势.随着PP无纺布应用领域的不断扩大,PP纤维在无纺布技术生产纺织品上的份额将不断上升.同时,指出了多功能纤维专用树脂和纺黏熔喷无纺...     

ALBIS集团投资一条7m幅宽的苏拉-纽马格纺粘生产线

<正>建立在第一条纽马格意大利非织造布生产线成功的基础上,ALBIS公司决定扩大其纺粘生产能力,于是定了第二条纽马格纺粘线。这条生产线包含了一个3箱体SMS配置(纺粘/熔喷/纺粘)和双组分设备。     

化纤工程开发中的试验设备及装备状况

阐述了化纤生产试验设备及装备在化学纤维研究开发中的重要性以及国内外的使用现状,重点介绍了聚合、纺丝成形、双组分纺丝、变形丝、多功能单丝、纺粘及熔喷法非织造布以及特种纺丝试验设备的技术特点。     

非织造布

20045260纽马格公司成功获取NanovaI技术的制造加工权ChemicalFiberInternational,2003,53(4),p.290(英)德国化纤机械生产商纽马格公司最近在非织造领域扩大其产品。自2002年4月,纽马格公司获得艾森公司的纺粘非织造技术专利后,成功生产了一些纺粘非织造领域的新设备并掌握了一些新的解决方案。而Nanoval技术则是采用熔喷成网的先进非织造技术。纽马格公司通过获取Nanoval技术的制造加工权来不断发展壮大公司的业绩。这种熔喷技术与传统熔喷技术相比具有如下优势:产品强度高、产量大且能耗低。(沈莉莉)     

Mytrex工业公司在台湾建造熔喷法生产线

台湾桃园Mytrex工业公司已建造了熔喷法无纺织物的生产线,它采用了新的熔喷技术及相关的复合材料新设施。Hytrex公司生产用作服装和睡袋的绝热材料、面罩的过滤介质、液体和气体的过滤材料、手术衣及人造革基布。     

熔喷技术

介绍了熔喷生产工艺及熔喷技术的关键部件——熔喷模头的设计。指出:模头顶点 E 的宽度小于0.508mm,毛细孔直径范围为0.076—0.56mm,气槽 G 的尺寸范围是0.203—0.381mm,阐述了熔喷生产过程中气流速度、气流温度和树脂的流动速度的相互关系,及对熔喷产品质量的影响,并对熔喷技术所用的原料及最终产品的性能和用途作了简要介绍。     

熔喷非织造技术的发展与应用现状

熔喷是一种制备超细纤维非织造布的加工方法,自出现以来发展非常迅速。介绍了熔喷非织造布的工艺原理,以及国内外熔喷非织造布技术的发展,并列举了熔喷非织造布在各个领域的主要应用现状。结果表明:熔喷非织造布有着广阔的应用领域和良好的市场前景。     

Development and performance study of polypropylene/polyester bicomponent melt‐blowns for filtration

In this study, a new type of polypropylene (PP)/polyester (PET) bicomponent melt‐blown (bi‐MB) for filtration was developed through the melt‐blowing process with raw materials of melt‐blown (MB)‐grade PP and PET chips. The structure, porosity, and filtration performance of the bi‐MBs were tested through relevant instruments. The results show that the average fiber diameter in the bi‐MBs was 2–3.5 μm, the average pore size was 12.3–15.6 μm, and the porosity was 90–94%. The results also show that the filtration efficiency of the bi‐MBs was much higher than that of monocomponent PP MBs. It reached the highest value of 97.34% when the PP/PET ratio was 50/50 and could be used as high‐performance filter media. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

Analysis of isothermal two-layer blown film coextrusion

The mechanics of a bicomponent two-layer blown film coextrusion is studied theoretically. As a first step for the modeling of this complex process, we adopt a simple system in which the flow is assumed to be isothermal and the two layers are a Newtonian and an upper-convected Maxwell fluid (UCM), respectively. The two fluids are chosen to investigate the relative influence of viscous and viscoelastic forces on the flow mechanics of the process. For a given total flow rate, blow-up ratio, freeze-line height, and film gage, the radius and the melt thickness profiles of the blown film are determined numerically for various values of the flow rate ratio of the two fluids. When the relaxation time of the UCM layer is small, the flow mechanics including the shape of the bubble (or the radius profile) is not much different from that of a Newtonian single-layer flow. With increasing relaxation time, the viscoelasticity effect of the UCM layer becomes more and more pronounced and eventually dominates the bubble dynamics even though its layer thickness may be smaller than that of the Newtonian layer.     

口罩聚丙烯熔喷纤维与聚丙烯熔喷原料的塑化及结晶行为对比研究

为阐明口罩过滤层聚丙烯(PP)熔喷纤维与熔喷PP塑料的塑化和结晶行为间的差异性,采用差示扫描量热仪(DSC)和热台偏光显微镜系统研究了3种熔喷PP塑料与4种口罩过滤层PP熔喷纤维的塑化和结晶行为.结果表明,PP熔喷塑料试样3显示单峰,PP熔喷纤维试样5呈现3峰,而其余PP熔喷塑料和PP熔喷纤维均呈现双峰;与PP熔喷塑料...     

聚酯低熔点皮芯复合短纤维生产工艺探讨

介绍了聚酯低熔点皮芯复合纤维的特殊性能要求以及原料的选择,在试验设备上探索纺丝成形、后处理拉伸卷曲、纤维表面处理、复合纺喷丝组件等工艺,为批量生产高复合率聚酯低熔点皮芯复合短纤维提供可行的生产工艺指导。     

Properties of PP/PET bicomponent melt blown microfiber nonwovens after heat‐treatment

Polypropylene (PP)/poly(ethylene terephthalate) (PET) bicomponent (bico) fibres are successfully melt blown in the Reicofil® meltblown (MB) pilot line commissioned at the Textiles and Nonwovens Development Center (TANDEC), the University of Tennessee, Knoxville. The bico fibers possess a cross‐sectional side‐by‐side configuration. The originally expected greater fiber crimp due to density and fine structure gradients on the different sides of the bico fibers was not commonly observed in the normal MB webs. These fabrics were exposed to dry heat for a period of time. The properties before and after the heat treatment were determined and compared to investigate the effects of heat on their properties. It was found that the bico webs are thermal dimensionally stable and many of their properties were not significantly affected. A mechanism is suggested on the thermal dimensional stability of the PP/PET bico MB webs. © 2003 Society of Chemical Industry     

熔喷/干法纤网在线复合汽车吸音棉的生产工艺

为了实现熔喷/干法纤网复合汽车吸音棉的在线生产,以开发300 g/m2的复合吸音棉为例,对熔喷工艺、干法纤网工艺以及熔喷/干法纤网在线复合等内容进行了分析介绍。结果表明:采用熔融指数150 g/min的聚丙烯切片,并控制好模头温度、热空气喷射角、热空气压力、接收距离等熔喷工艺参数,采用纤度为3.3 dtex的三维卷曲涤纶中空短纤维和阻燃涤纶短纤维组成的干法纤网,纤网加入熔喷丝的角度在75～83°之间时,能够得到较好的复合吸音棉材料。     

Study of polypropylene/poly(ethylene terephthalate) bicomponent melt‐blowing process: The fiber temperature and elongational viscosity profiles of the spinline

Although there are significant differences between high‐speed melt spinning and melt blowing (MB), they are similar in many important components. This study, motivated by the need to better understand the bicomponent MB process, used the basic theories of high‐speed melt spinning to estimate the fiber temperature and elongation viscosity profiles of the polypropylene/poly(ethylene terephthalate) (PP/PET) bicomponent MB process. During the MB process, the filament temperature decreased dramatically within the first 2 in. from the MB die. The fiber temperature‐decay profiles of PP, PET monocomponent, and PP/PET bicomponent filaments followed similar trends. PP filaments attenuated faster than PET filaments and the bicomponent filaments attenuated at a medium rate between that of PP and PET. Accordingly, the elongational viscosity increased significantly in the first 2 in. from the die. PET filaments exhibited higher elongational viscosity than that of 100% PP filaments. The elongational viscosity profile of 75%PP/25%PET was between that of PP and PET monocomponent filaments. These data provided important information on understanding the MB process and filament attenuation. It also suggested that the filament elongational viscosity profile is the key factor in production of finer bicomponent MB fibers. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 1145–1150, 2003     

Rheology modifier additive for enhanced processability of polyethylene for blown-Film applications

Polyethylene is a versatile polymer suitable for a large variety of flexible and rigid packaging applications. Its mechanical and rheological properties can be tuned across a wide range by controlling its molecular architecture, such as the amount and distribution of olefinic comonomers (short chain branching), long chain branching, and molecular weight distribution. Linear low-density polyethylene (LLDPE) is known for its high toughness which enables downgauged film structures and low-density polyethylene (LDPE) is known for its excellent shear thinning and melt strength which enables enhanced processability and high throughput, such as on blown film lines. In order to obtain a balance of toughness and processability on films produced on blown film lines, blends of LLDPE and LDPE are commonly used. In this paper, we describe additive-based approaches, including a new product, DOWLEX™ (TM = trademark of the Dow Chemical Company (“Dow”) or an affiliated company of Dow) GM AX01, which enhances melt strength and other rheological properties of polyethylene, enabling fabrication of films with lower LDPE content while still maintaining excellent rheological properties and higher toughness versus conventional LLDPE/LDPE blends. The higher toughness enables downgauging without loss of mechanical properties, which in turn reduces consumption of polymer resulting in a more sustainable solution.     

各向同性沥青的可纺性及纺丝工艺研究

以乙烯裂解焦油调制的各向同性沥青为原料，对沥青熔喷纺丝的可纺性及其主要影响因素进行探讨。通过对喷丝头最大拉伸倍数和纤维形态及直径的测定，说明沥青软化点、熔体温度、沥青吐出量、热空气温度、热空气流量和接收距离等工艺参数对沥青熔喷纺丝可纺性有明显影响。软化点为２３３℃的国产石油沥青（ＧＰ－３）有较好的可纺性，可以满足熔喷纺丝对沥青的高要求。