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。     

1870dtex/2锦纶66与锦纶6浸胶帘布的性能对比

对1870dtex/2锦纶66和锦纶6浸胶帘布性能进行对比试验。结果表明,老化前锦纶66浸胶帘布的断裂强力大于锦纶6浸胶帘布;老化温度不超过180℃时,锦纶66浸胶帘布的断裂强力保持率和粘合强度保持率与锦纶6浸胶帘布相差不大;老化温度超过180℃时,锦纶66浸胶帘布的断裂强力保持率远大于而粘合强度保持率总体小于绵纶6浸胶帘布;采用两种锦纶帘布作胎体帘布的成品轮胎外缘尺寸、强度和耐久性能均达到国家标准要求。实际应用时应根据性价比选用胎体锦纶帘布品种。     

锦纶66帘线在载重车胎应用中的性能变化分析

神马集团橡胶轮胎有限责任公司一直使用神马牌锦纶66浸胶帘子布生产载重汽车轮胎,骨架材料应用十分稳定。为此,我们试图通过测试帘线压延挂胶后,硫化后(强度试验后)以及耐久、强度试验后帘线性能的变化来优化工艺,稳定产品质量,为轮胎设计者提供提高产品使用性能的依据和途径。测试结果很有意义,现做一简要阐述。一、检测轮胎规格的选取10.00-2016PR横向花纹载重汽车轮胎。胎体结构:神马牌高强力T4型锦纶66帘线,1770dtex/2V16层,1770dtex/2V22层。二、神马牌高强力T4型锦纶66帘线1770dtex/2的有关标准。组织规格见表1,物理性能指标见表2…     

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。     

浅析我国锦纶6帘子布生产现状

介绍了我国帘子布行业的发展历程 ,综述了锦纶 6帘子布行业的生产和应用现状及其相关的上下游产品的现状和发展趋势 ,分析了我国锦纶 6帘子布生产厂的设备和技术状况以及该行业的发展前景 ,指出锦纶 6帘子布行业的发展应该提高产品档次 ,加强轮胎质量 ,并采用低成本的国产化生产技术的发展思路。     

锦纶66浸胶帘布在工程机械轮胎中的应用

对比分析锦纶66和锦纶6浸胶帘布在工程机械轮胎中的应用效果。锦纶66帘布在覆胶过程中收缩小,制成的轮胎采用硫化罐硫化时可省略后充气冷却工序。锦纶66帘布可以降低轮胎使用过程中的生热,延长使用寿命,提高安全性能;同时可以减小轮胎质量、提高轮胎翻新率以及降低生产成本,更适用于工程机械轮胎。采用1400dtex/3锦纶66帘布生产的工程机械轮胎的性能远优于国家标准要求。     

高强力锦纶66工业丝的开发与应用

介绍高强力锦纶66工业丝的开发、性能特点及应用.通过提高成纤高聚物相对分子质量、降低输送温度、调整耐热添加剂配比和改进纺丝、牵伸工艺生产的高强力锦纶66工业丝具有强度高、热收缩率低、高温下强力保持率高、耐疲劳及高冲击等特点,主要应用于高性能轮胎、胶管、输送带等的生产,可实现产品轻量化,减少消耗.     

高强力T4B轻型锦纶66浸胶帘子布特性

高强力T4B轻型锦纶66浸胶帘子布具有断裂强度高、单重轻、抗冲击负荷性能优异、尺寸稳定性好、耐疲劳强度高以及橡胶的附着力好等特点，T4B轻型帘布已通过轮胎里程试验，批量产品已得到国内知名轮胎企业的认可，该产品主要用于斜交载重胎、工程胎、半钢子午胎等产品中。关于T4B轻型帘布特性及应用，现作一简要阐述。     

改性锦纶66帘布在轻载子午线轮胎中的应用

试验研究改性锦纶66帘布在轻载子午线轮胎中的应用。结果表明，采用1400dtex／3F94TE改性锦纶66帘布替代2200dtex／2—100聚酯帘布用作6．50R16 10PR轻载子午线轮胎胎体骨架材料，成品轮胎的耐久性能、强度性能和高速性能均有所提高，胎圈脱空现象明显减少，同时可降低生产成本。     

影响锦纶66白坯帘子布生产效率的原因及措施

就影响锦纶66白坯帘子布生产效率的原因进行了分析,从生产计划安排、加捻速度、落丝上架、标识线管理等方面入手找到了提高锦纶66白坯帘子布生产效率的有效措施,实现了白坯帘子布高质高量生产的目标,满足了疫情期间国内外客户对帘子布的采购需求,避免了因需求高不能及时交货的问题,降低了客户投诉及抱怨,提升了神马牌帘子布的品牌形象.     

Vibration welding of nylon 6 to nylon 66

Vibration welding of dissimilar nylons is a promising technique for assembling complex components made of different polymers. The effects of pressure and meltdown on the tensile strength of nylon 6 (PA 6) to nylon 66 (PA 66) vibration welds were determined in this study using an experimental design and three weld geometries. Weld strengths were generally improved by increasing meltdown and decreasing weld pressure. The weld strength was also shown to vary with the position of the lower melting material for T‐welds. Using differential scanning calorimentry and fracture surface analyses, it is concluded that for all geometries, higher weld strengths can be achieved when both materials are melted. Polym. Eng. Sci. 44:760–771, 2004. © 2004 Society of Plastics Engineers.     

Interpretive nonlinear viscoelasticity: Dynamic properties of nylon 6, nylon 66, and nylon 12 fibers

Nonlinear response of nylon 6, nylon 66, and nylon 12 fibers to sinusoidal straining under relatively large strain amplitude is analyzed in terms of the changes in properties during the straining, i.e., the change in modulus, change in internal friction and change in structure which involves energy release or absorption in straining. Modulus generally increases with strain but it decreases with increase of strain amplitude, the effect of strain amplitude being largest with nylon 6 and smallest with nylon 66. Mechanical loss increase with the increase of strain amplitudes in nonlinear manner, and the magnitude of change is largest with nylon 66 and smallest with nylon 6. During the extension phase, structural change occurring in nylon 6 is predominantly an increase in order or orientation while that with nylon 66 is crack opening or cavitation. Various aspects of the experiments and analysis of the data are described in detail.     

Toughened nylon resins

The impact failure of blends of nylon 6,6 and low density polyethylene grafted with maleic anhydride (PEgMA) is discussed in terms of fracture morphology, composition, and particle adhesion and dispersion. Basic criteria for effective impact modification of these materials are developed. A numerical model for estimating the extent of shear banding resulting from shear stress field overlap between neighboring impact modifier particles is presented.     

Comparison of nanocomposites based on nylon 6 and nylon 66

Nylon 6 and nylon 6,6 organoclay nanocomposites were prepared by melt processing using a twin screw extruder. The effects of polyamide type and processing temperature on the mechanical properties and the morphology of the nanocomposites were examined. Mechanical properties, transmission electron microscopy (TEM), wide-angle X-ray diffraction (WAXD), percentage crystallinity and isothermal thermo-gravimetric analysis (TGA) data are reported. A particle analysis was performed to quantitatively characterize the morphology; these results are later employed in modeling the modulus of these materials using composite theory. No significant difference was observed in the mechanical properties and morphology of PA-6 nanocomposites processed at two different temperatures. PA-6 nanocomposites had superior mechanical properties than those made from PA-66. The tensile strength of PA-66 nanocomposites deviated from linearity at high levels of MMT. WAXD and TEM results show that the PA-6 nanocomposites are better exfoliated than the PA-66 nanocomposites, which exhibit a mixture of intercalated and exfoliated structures. Mechanical properties were consistent with the morphology. DSC reveals a higher percentage of crystallinity in the PA-66 samples. Isothermal TGA shows only a 5% difference in the degradation of the organic modifier on the organoclay processed at 240 °C versus 270 °C. Particle analysis shows a higher average particle length and thickness, and a lower average particle density and aspect ratio in nanocomposites based on PA-66 versus PA-6. The Halpin-Tsai and Mori-Tanaka composite theories predict satisfactorily the behavior of the PA-6 nanocomposites, while the PA-66 nanocomposites were predicted acceptably up to a certain volume fraction where the non-linear behavior takes effect. All the results indicate that there is a lower degree of exfoliation in the nanocomposites produced with a PA-66 matrix apparently stemming from the chemical differences between PA-6 and PA-66.     

Toughened nylon66/nylon6 ternary nanocomposites by elastomers

The elastomer toughening of PA66/PA6 nanocomposites prepared from the organic modified montmorillonite (OMMT) was examined as a means of balancing stiffness/strength versus toughness/ductility. Several different formulations varying in OMMT content were made by mixing of PA6 and OMMT as a master‐batch and then blending it with PA66 and different elastomers in a twin screw extruder. In this sequence, the OMMT layers were well exfoliated in the nylon alloy matrix. The introduction of silicate layers with PA6 induced the appearance of the γ crystal phase in the nanocomposites, which is unstable and seldom appears in PA66 at room temperature and it further affected the morphology and dispersion of rubber phase resulting in much smaller rubber particles. The incorporation of POE‐g‐MA particles toughened the nanocomposites markedly, but the tensile modulus and strength were both reduced. Conversely, the use of OMMT increased the modulus but decreased the fracture toughness. The nanocomposites exhibited balanced stiffness and toughness. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Biodegradation of nylon4 and its blend with nylon6

The nylon4 portion in the blend films composed of nylon4 and nylon6 was degraded and completely disappeared within 4 months in two kinds of composted soils gathered from different university farms as well as pure nylon4 film reported previously, while the nylon6 portion remained even after the burial test for 15 months. Nylon4 powder was also degraded to carbon dioxide in the degradation test in an activated sludge obtained from a sewage disposal institution in Kogakuin University. Three species of microoganisms (i.e., ascomytous fungi) were isolated through the inoculation from the nylon4 film partially degraded in the soil on a medium containing nylon4 powder as a carbon source. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 2307–2311, 2002     

Fatigue-resistant nylon alloys

Crystalline nylon 66 was modified by blending with both an amorphous nylon and a rubbermodified amorphous nylon. The ternary blends exhibit a 50–100-fold decrease in fatigue crack propagation rates, even at rubber concentrations of only 1 or 2%. These same blends do not necessarily exhibit improved impact strength and the examination of a variety of alloys and blends demonstrates that fatigue and impact fracture mechanisms are distinctly different. The fracture surface morphologies indicate that the basic fatigue fracture mechanism of craze coalescence for nylon 66 is not changed by alloying. However, the presence of the rubbery phase leads to cavitation and ductile drawing that retard the craze breakdown and coalescence processes without evidence of crack tip blunting. Surprisingly, the addition of rubber-modified nylon 66 to a nylon 66 matrix does not impart as great an improvement in fatigue resistance as does the miscible amorphous nylon. Also, alloys having improved impact strength are observed to exhibit inferior fatigue resistance. These results demonstrate that the excellent fatigue resistance of crystalline polymers can be improved even further by judicious selection of alloying ingredients optimized specifically for fatigue fracture. © 1994 John Wiley & Sons, Inc.     

Developing critical extrusion parameters for nylon 6, nylon 66, and nylon 46 polyamide from the rheology data

This paper describes a new approach to the rheological characterization of engineering plastics such as nylon 6, 66, and 46 polyamides using a capillary rheometer. The melt viscosity data as a function of temperature, shear rate, and residence time were measured and evaluated to demonstrate how to accurately predict critical extrusion parameters, such as barrel temperature profile, stock temperature window, and the screw design requirements, for extruding strip, tubing, and profiles. The results of this work provide a practical and simple quality control tool to select a polyamide resin for optimum processing, and to develop critical processing parameters for extrusion.