我国锦纶帘子布的生产状况及市场前景

综述了国内锦纶帘子布的生产现状及目前国内帘子布市场近况，浅析了锦纶帘子布行业存在的差距和问题，提出了锦纶帘子布生产的发展趋势，必须发展原料工业，要注意消化、吸收、提高引进技术，加快老企业改造，走集约化经营和内涵发展道路；对帘子布的市场前景进行了预测。     

环己烷氧化法制己内酰胺新工艺——环己烷氧化制环己酮中间试验

一、概述为了贯彻伟大领袖毛主席“备战、备荒、为人民”的伟大战略方针,大力发展合成纤维工业,具有十分重要的意义。锦纶是我国重点发展的合成纤维优良品种之一,在我国正在大量发展。目前,生产锦纶单体己内酰胺的方法,主要有苯酚法,环己烷氧化法和光亚硝化法。苯酚法在我国已经投入大量生产,工艺路线比     

帘子布供需及价格趋势剖析

一、帘子布供需情况在“八五”期间，帘子布的供需情况有了较大变化，由供不应求转向供需平衡，至今已供大于求。在品种上，目前国内橡胶行业的情况是：斜交股用锦纶，半钢子午胎用涤纶和锦纶66（改性）；自行车胎、手推车胎、摩托车胎用锦纶6；三角带、风扇带用涤纶。各品种所占比例，1996年为：锦纶6占76％，锦纶66占19％，绦纶占5％。此外仍有一些小厂生产维纶帘布几百吨供小橡胶厂生产三角带用。棉和人造丝帘布已不生产。目前国内锦纶帘布厂的生产技术和设备状况有引进国外的和采用国产的两种，其产量各占50％。用引进技术和设备的企业…     

锦纶66与锦纶6帘线的性能对比

对锦纶66与锦纶6帘线的性能进行对比。与锦纶6帘线相比，锦纶66帘线具有良好的基本耐热性能、尺寸稳定性及耐高温性能，在受热状态下的断裂强力保持率较高；用其生产轮胎时可提高硫化温度，缩短硫化时间，提高生产效率，而轮胎使用寿命长，安全性和耐久性较优。     

国内锦纶新产品开发应用

介绍了国内粗旦和细旦锦纶长丝，高强及异形截面锦纶长丝，锦纶６与锦纶６６共混短纤维，ＰＥＴ／ＰＡ６复合纤维，粗旦短纤维、帘子线、ＢＣＦ及单丝等新产品的开发情况，指出锦纶生产必须向差别化、多功能、高附加值方向发展。     

天津德凯公司发展系列毛用活性染料

天津德凯化工有限公司近年来致力于活性染料的开发与生产，除生产纤维素纤维用活性染料德凯素（Deksol）外，还大力发展羊毛用活性染料德龙素（Delosol）它适用于羊毛、羊绒、防缩羊毛的染色和印花，也可用于丝绸和锦纶的印染。     

充分利用“南化”单体资源加快江苏锦纶生产发展

本文就锦纶的性能、用途和当前国内外的锦纶生产状况做了较为详细的介绍,对锦纶的消费市场进行了分析和预测,依据南京化学总公司建设年产5万吨己内酰胺项目,提出了加快发展的江苏锦纶生产的设想。分析了江苏发展锦纶生产的有利条件,并为建设高水平的锦纶生产基地,提出了三点初步意见。     

一季度国内化纤市场分析(下)

４、锦纶丝据统计，２０００年１～３月全国累计生产锦纶丝７６．８千吨，同比增产８．６７％。３月份生产３２．３千吨，比２月份增产５．１６％。 据统计，１～３月锦纶短纤进口 １６３９吨，同比增长３．９７％；进口金额为３９０万美元，同比增长２８．４３％。锦纶长丝纱线进口 ２８４６５吨，同比增长４２．０％；进口金额为５３９６万美元，同比增长３７．８０％。锦纶短纤进口 ４２０吨，同比下降１４．９１％；进口金额为１０３万美元，同比下降０．８５％。锦纶长丝织物进口３２２７２万米，同比增长３．４２％；进口金额为２２８…     

国内锦纶长丝市场前景看好

由于锦纶的亲水性，使其对人体的舒适性优于涤纶面料，迎合了人们对服饰不仅要美且要舒适的要求，锦纶面料的市场需求量因此放大，锦纶长丝的市场前景被看好。 锦纶经编类面料市场需求有稳步增长的势头。国内市场对装饰性服饰需求的增加，锦纶经编产品无疑是一大热点。另外，锦纶经编产品的出口形势良好，对锦纶长丝中的ＦＤＹ细旦丝需求也在增加。 织袜业对锦纶长丝的需要稳中有升。我国袜业经过近十年的发展，将要进入产业升级阶段。一类企业具有相当规模优势、良好品牌效应，以中高档产品为主，适应中、高档消费者；另一类为私营企业，多…     

高强度锦纶66 T4（A）在载重斜交轮胎中的应用

以高强度锦纶66T4(A)浸胶帘布替代普通2100dtex／2锦纶6浸胶帘布用作胎体骨架材料生产12．00-20载重斜交轮胎，并进行对比试验。结果表明，锦纶66T4(A)的耐热性能、尺寸稳定性和强力保持率优良；采用锦纶66T4(A)浸胶帘布生产的载重斜交轮胎的耐久性、速度性能、强度和实际行驶里程均有较大提高，轮胎早期胎圈爆破问题得到解决，经济效益良好。     

Synthesis of hybrid ZnO/CNTs nanoparticles and their reinforcement in nylon‐6 polymer fibers

In this investigation, in situ synthesis of zinc oxide nanoparticles in the presence of multiwalled carbon nanotubes (CNTs) have been carried out using a sonochemical technique. Zinc(II)acetate was used as a source of ZnO in the presence of ethylene glycol (EG) to obtain zinc oxide (ZnO) nanoparticles. The synthesized hybrid ZnO/CNTs nanoparticles were used as reinforcements to enhance the mechanical, thermal and UV absorbing properties of Nylon‐6 composite fibers. The polymer nanocomposites (PNC) were fabricated by dry mixing Nylon‐6 polymer powder with the ZnO/CNTs hybrid nanoparticles as the first step, then followed by the drying and melt extrusion process of fiber materials in a single‐screw extruder. The extruded fibers were stretched and stabilized using a godet set‐up and wound on a Wayne filament winder machine. The hybrid ZnO/CNTs infused Nylon‐6 composite fibers were compared with commercial ZnO, CNTs infused Nylon‐6 composite fibers and neat Nylon‐6 fibers for their structural and thermal properties. The morphological characteristics of ZnO/CNTs nanoparticles were carried out using X‐ray diffraction and transmission electron microscopy (TEM) techniques. The Nylon‐6 PNC fibers which were of ～80 μ size were tested mechanically. The tensile tests revealed that failure stress of the 1% infused ZnO/CNTs Nylon‐6 PNC fibers is about 73% higher than the neat extruded Nylon‐6 fiber and the improvement in the tensile modulus is 377.4%. The DSC results show an increase in the glass transition temperature and crystallization for ZnO/CNTs infused Nylon‐6 PNC fibers. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

Synthesis and Characterization of Conducting Composites of Polypyrrole/Polypyrrole-Coated Short Nylon Fiber and Natural Rubber

Pyrrole was polymerized in the presence of anhydrous ferric chloride as oxidant and p-toluene sulphonic acid as dopant. Polypyrrole-coated short Nylon fibers were prepared by polymerizing pyrrole in the presence of short Nylon fibers. The resultant polypyrrole (PPy) and polypyrrole-coated Nylon fiber (F-PPy) were characterized using SEM and then used to prepare rubber composites based on natural rubber. The cure pattern, cure kinetics, filler dispersion, DC conductivity, mechanical properties and morphology of the resulting composites were studied. The presence of PPy-coated fibers in the natural rubber/PPy system reduced the cure time significantly. The DC conductivity of the composites was found to be better for the F-PPy system compared to PPy-filled NR composite. The F-PPy system also showed better tensile strength, modulus and tear resistance.     

Structure of heat-treated Nylon 6 and 6.6 fibers. I. The shrinkage mechanism

Nylon 6 and 6.6 fibers were submitted to thermal annealing in a wide range of temperatures (below and above their glass transition temperatures) under inert atmosphere and slack condition, allowing free shrinkage. The structural changes due to the heat settings were analyzed by several techniques (differential scanning calorimetry analysis, wide- and small-angle X-ray scattering, and birefringence). The results revealed different recrystallization responses of the fibers to the applied thermal annealings and consequently different shrinkage mechanisms. In the recrystallization of the Nylon 6 fibers were involved a generation of nuclei crystallites in the interfibrillar regions, as well as growth and perfection of these new crystallites and preexisting ones. But, recrystallization of the Nylon 6.6 fiber was accompanied only by growth and perfection of the preexisting crystals. The existence of the nuclei crystallites at temperatures of heat treatments above 120°C was the major commanding factor for the Nylon 6 fiber to undergo less shrinkage than the Nylon 6.6 fiber. These very tiny crystallites worked as crosslinking points that would impose restrictions in the mobility of the chains segments, inhibiting subsequent disorientation of the amorphous regions and consequently intense shrinkage, thus resulting in recrystallization in a preferred direction of the fiber axis. The Nylon 6.6 fiber experienced an instantaneous shrinkage at the annealing temperature around 70°C. That was the temperature necessary to release its hydrogen bonds and the starting temperature for presenting its major structural changes, including global disorientation of the amorphous and crystalline regions. Thus, its recrystallization occurred with no preferred orientation. Also, it was suggested that the occurrence of so different shrinkage mechanisms reside in the different crystalline morphology that these fibers originally possessed before the heat treatments. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 68: 441–452, 1998     

Effect of solvent evaporation rate on the crystalline state of electrospun Nylon 6

The role of solvent evaporation on the crystalline state of electrospun Nylon 6 fibers was examined by electrospinning into a closed chamber filled with different concentrations of solvent vapor. It was found that the thermodynamically stable α form became increasingly dominant in Nylon 6 fibers electrospun out of both 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) and formic acid as the vapor phase solvent concentration increased. It is believed that the formation of the metastable γ form is due in part to the fast solvent evaporation kinetics associated with the electrospinning process. By varying the vapor phase concentration and thus the rate of solvent evaporation during electrospinning, we were able to vary the resulting crystal structure of the electrospun Nylon 6, as shown by XRD, Raman and FTIR.     

Improvement of tensile properties and tuning of the biodegradation behavior of polycaprolactone by addition of electrospun fibers

A novel approach to simultaneously improve the physical mechanical properties and tune the biodegradation of polycaprolactone (PCL)-based composites is presented. The viability of electrospun fibers as fillers for polymer nanocomposites is shown. Nylon was chosen as the reinforcing material, whereas polyvinylpirrolidone (PVP) was selected to calibrate the biodegradation rate. Nylon fibers were effective reinforcing fillers for the PCL matrix, also in co-presence with PVP fibers. PVP fibers were, on the other hand, critical in shaping the biodegradation behavior, because they were able to create channels by which water can easily penetrate within the bulk of the material. The cooperative effect of nylon and PVP fibers allowed to obtain composites able to degrade more quickly than the matrix or than the samples containing either of the two fibers, while retaining a remarkable dimensional stability even after 20% of the total mass had degraded.     

Model of Nylon 6 Fibers Microstructure Microfibrillar Model or “Swiss-Cheese” Model?

Abstract

The microfibrillar morphological structure of aliphatic polyamide fibers has been consistently presented by the three phase microfibrillar model proposed by Prevor?ek and not by the two phase microfibrillar model proposed by Peterlin. A widely spread opinion is that the 3-phase or “Swiss-cheese” model is applicable in all cases, either in case of high-tenacity fibres or in case of standard Nylon 6 textile fibers. Although the 3-pbase X-ray analysis is now routinely performed, the basic issue of 2-phase vs. 3-phase model has not yet been resolved.

We have investigated the suitability of both models and found out that the 3-phase model which is suitable for high-tenacity Nylon 6 fibres cannot be applied in case of aliphatic Nylon 6 fibres manufactured by standard melt spun process. The microfibrillar structure of these fibers resembles to the microfibrillar model of PE more than to the morphology of high-tenacity Nylon 6 fibres. The generally established opinion about applicability of the 3-phase model for all aliphatic Nylon 6 fibres, regardless of the fiber forming process, is not acceptable. The key finding is. however, that Nylon 6 fibers can exist, depending on the forming process, in two morphologically different modifications corresponding to the above-mentioned models. By altering the fiber forming process it is possible to alter the morphology and to control the distribution of amorphous extended interfibrillar and intrafibrillar molecules, and to widen the range of mechanical and thermal properties.     

Novel fishnet fibers with anti‐adhesion of seaweeds obtained by UV‐irradiation technique

A novel Nylon‐6 fishnet fiber with the antiadhesion of seaweeds was prepared by UV radiation‐initiated grafting of acrylic acid (AA) onto Nylon‐6 fibers, and its structure was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The influences of grafting conditions, such as irradiation dose, temperature, concentration of monomer, inorganic acid, and inhibitor etc., on grafting rate were studied, and the antiadhesion of seaweeds was evaluated with Dunaliella. The results showed that the grafting amount of Nylon‐g‐AA was increased with the increase of irradiation time. With the increase of concentration of AA, temperature, reaction time, inorganic acid, and inhibitor, the grafting amount increased firstly and then decreased, respectively. Nylon‐6 fibers modified by Poly(acrylic acid) (PAA) had a strong effect on the adhesion of Dunaliella, and the antiadhesion was improved with the increase of the grafting amount. Results from the mechanical analysis revealed that the tensile strength of the UV‐irradiation fibers decreased. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1252–1256, 2007     

国内外阻燃尼龙研究开发现状

概述国内阻燃尼龙的研究开发状况,介绍国外阻燃尼龙的研究开发动向。     

SPET离聚物与尼龙6共混物相容性的研究

将分子链相对较为刚性的SPET离聚物与尼龙6进行共混纺丝实验,通过DMA、SEM等方法着重考察了体系中离子基团的引入对共混物相容性的影响。结果表明:共混物两组分之间具有很好的相容性;离子─偶极作用对其相容性的提高起到关键性的作用。     

Modeling the response of monofilament nylon cords with the nonlinear viscoelastic, simplified potential energy clock model

The Simplified Potential Energy Clock Model has been previously shown to predict accurately glassy polymer responses such as yield, creep, enthalpy relaxation, and physical aging. It was now used to predict the behavior of monofilament Nylon fiber. Even though the fibers showed process-induced anisotropy, the simpler isotropic model could be used to describe uniaxial tests. The model predictions again accurately predicted a wide range of Nylon experimental data.