飞机座椅垫的胶接

波音747飞机的座椅垫是用泡沫塑料和包布——尼龙纱布包复胶接而成的,表面平整、干净、美观,弹性好。每当修理更换时,都要花费大量外汇从国外进口。为及早使用我国的座椅垫,我们承揽了这种座椅垫的试制工作。民航要求座椅垫所用材料应具有自熄性。根据我国国情,我们选用的基体材料为国内大连独家生产的自熄性软聚氨酯泡沫塑料,包布材料采用512防火锦丝绸,胶粘剂为聚氨酯101胶。在包布与泡沫塑料的胶接工艺过程中,如何才能保证包布与泡沫塑料粘贴得平整,     

高性能聚氨酯破除垄断

<正>2022年3月10日,与生活息息相关的聚氨酯材料开发有了新突破。黎明院研发的阻燃环保型高性能聚氨酯材料打破了国外知名品牌在环保、阻燃、高端聚氨酯材料的垄断。聚氨酯相关专家认为,该公司开发的阻燃环保型高性能聚氨酯材料阻燃性能、环保性能优良,带动了行业技术进步,推动了我国聚氨酯产业迈向中高端,助力我国汽车品质的提升和航空事业的发展。黎明院研发的聚氨酯软质泡沫凭借其优异特性,可应用于飞机、火车、汽车等交通工具的座椅、靠垫和头枕等部位。已成为宇通客车T7汽车座椅等内饰件聚氨酯原料的独家供应商,服务于全国两会、博鳌亚洲论坛等大型活动。     

发泡聚氨酯座椅VOC因素分析及快速改进

通过对座椅生产工艺进行分析,发现影响座椅VOC(挥发性有机化合物)的关键是聚氨酯发泡工艺,运用质量分析工具鱼骨图和FMEA失效分析,对影响聚氨酯VOC的因子进行分析和逐步筛选,得到关键因子,通过对除醛助剂添加量、聚醚原料醛酮含量和空气流动程度等因子进行实验分析,找到快速改进的方法,降低发泡聚氨酯座椅VOC含量。     

亨斯迈聚氨酯事业部荣获宝马可持续发展供应商创新大奖

正亨斯迈聚氨酯事业部凭借低挥发高性能的聚氨酯座椅系统荣获宝马集团久负盛名的供应商创新大奖。汽车制造业致力于不断降低座椅的气味和挥发性有机物,以提高乘客舒适度和全方位驾乘体验。亨斯迈汽车材料团队成功开发了独特的MDI体系的座椅系统,这一创新化学技术在不改变舒适度和质量的前提下,大幅     

70迈儿童座椅新突破:国内首款聚氨酸脂冷发泡技术

70迈创新工艺,打造车规级冷发泡巴斯夫聚氨酯坐垫,将原车座椅的冷发泡技术运用到儿童座椅的坐垫上。在受到外力冲击时,坐垫依靠其高密度的聚氨酯里料,通过自身形变缓冲吸能,将力的冲击快速分散,保护孩子安全。冷发泡聚氨酯坐垫在形变吸能后,可以迅速恢复并支撑孩子身体,避免二次受力。70迈儿童安全座椅采用的冷发泡聚氨酯材料在减震性、柔韧性和稳定性上都远优于传统安全座椅的海绵、EPS、EPP等材质里料。     

B-LINE公司推出聚氨酯座椅

意大利B-LINE公司日前推出一款名为Multichair的座椅。该铰链式的座椅由Joe Colombo设计,外形时尚。座椅由两层聚氨酯泡沫坐垫构成,坐垫外层包裹着弹性织物。座椅两侧各有一条皮带,皮带两端的钢扣经镀铬并丝     

聚氨酯软泡市场广阔

<正>软质聚氨酯泡沫因其密度低、回弹性好、吸音、透气等优异特点,目前多用于家具、床垫和交通工具座椅等垫材。聚氨酯软泡是聚氨酯产品中用量最大的产品。随着聚氨酯软泡技术的提高,目前聚氨酯软泡还用     

福特拟在绝大多数车型中使用大豆基塑料

福特汽车公司将在今年晚些时候上市的新一代Explorer SUV车座椅中使用一种大豆聚氨酯泡沫混合材料,此外还力争在2010年底前在“近100％”的福特车型座椅中使用大豆材料。     

车材新闻

江森自控收购为专注商用飞机座椅市场据外电报道,德国汽车零部件商Keiper Recaro集团周四表示计划将旗下的汽车零部件业务出售给同业的江森自控公司(Johnson Controls Inc),以专注于日益增长的商用飞机座椅市场。     

水性环保阻燃胶粘剂在飞机座椅垫组件上的应用

研究了回天7504水性环保阻燃胶粘剂在飞机座椅垫组件上的应用,该胶粘剂解决了飞机座椅垫上阻燃泡沫、挡火层、阻燃尼龙搭扣之间粘接的难题,粘接的座椅垫组件能满足适航规章CCAR 25.853(c)燃烧试验要求以及环保要求。     

Water-blown rigid and flexible polyurethane foams containing epoxidized soybean oil triglycerides

Both rigid and flexible water-blown polyurethane foams were made by replacing 0–50% of Voranol® 490 for rigid foams and Voranol® 4701 for flexible foams in the B-side of foam formulation by epoxidized soybean oil. For rigid water-blown polyurethane foams, density, compressive strength, and thermal conductivity were measured. Although there were no significant changes in density, compressive strength decreased and thermal conductivity decreased first and then increased with increasing epoxidized soybean oil. For flexible water-blown polyurethane foams, density, 50% compression force deflection, 50% constant force deflection, and resilience of foams were measured. Density decreased first and then increased, no changes in 50% compression force deflection first and then increased, increasing 50% constant force deflection, and decreasing resilience with increase in epoxidized soybean oil. It appears that up to 20% of Voranol® 490 could be replaced by epoxidized soybean oil in rigid polyurethane foams. When replacing up to 20% of Voranol® 4701 by epoxidized soybean oil in flexible polyurethane foams, density and 50% compression deflection properties were similar or better than control, but resilience and 50% constant deflection compression properties were inferior. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

耐黄变聚氨酯软泡的研究

研究了抗氧剂、紫外线吸收剂、异氰酸酯等对聚氩酯泡沫黄变的影响因素。选用合适原料，开发出了性能优良、变色等级为0（氙灯老化箱内加速老化502h）的耐黄变聚氨酯软泡。     

聚氨酯泡沫塑料的阻燃

简要介绍了对多孔性材料聚氨酯泡沫塑料进行阻燃处理的重要性，并对各类阻燃剂的阻燃机理以及聚氨酯泡沫塑料阻燃研究领域的技术进展进行了介绍。较全面地综述了改善软质和硬质聚氨酯泡沫塑料阻燃性能的方法，包括：各种添加型阻燃剂和反应型阻燃剂的特点及使用效果，不同阻燃剂的协同作用，引入异氰脲酸酯基团提高硬泡阻燃性能，采用阻燃剂溶液浸渍开孔泡沫塑料等。     

Cushioning performance of flexible polyurethane foams

Impact cushioning and deformation of flexible open-cell polyester polyurethane (PU) foams were studied as a function of specimen geometry, including the incorporation of controlled voids. It was shown that cushioning behavior is dependent on sample geometry, which was in trun due to a complex balance of air compression and air flow, which changes with surface area-to-volume ratio of the impact specimen. Deformation studies show that impact compression proceeded initially by crushing the surface layers with little or no deformation of the center layers. As bulk compression was increased, deformation progressively propagated for the collapsed layers tending to a more uniform strain distribution at high bulk compression strains. Local asymmetric strain patterns were exaggerated using square cushions, because of cornr effects which complicated air flow paths. It was concluded that cushion curve determination of open-cell foams would be more accurately performed using circular samples and deflecting air pressure form the top surface of the cushion to more closely simulate practical conditions. When designing at or near the margin, the number of cushions should be kept to a minimum and open surface area to volume ratios minimized by adopting square rather than strip cushions.     

改性凹凸棒土催化淀粉的液化处理工艺及其产物在聚氨酯软泡合成中的应用

以改性凹凸棒土为催化剂的条件下,讨论了反应时间、反应温度、液化试剂、液固比等因素对淀粉液化反应的影响。以液化产物为部分原料制备聚氨酯软泡,讨论了淀粉液化物不同比例时对聚氨酯软泡性能的影响。结果表明,最佳淀粉液化条件:液化时间为120 min,主液化剂与辅助液化剂的比例为2∶1,凹凸棒土质量分数为2.0%,液固比为6∶1,温度为150℃。用液化产物制备聚氨酯软泡性能拉伸强度最高可达26.7 MPa,断裂强度71.9 kN/m,屈服强度80.4 kN/m。     

聚氨酯泡沫塑料在低密度炸药制备中的应用

以软质聚氨酯泡沫塑料为载体，制备低密度炸药。探讨了聚氨酯泡沫塑料在低密度炸药中的应用。简单介绍了采用炸药溶液浸渍法、水分散液浸泡法和原料混合发泡法这三种方法的工艺过程以及产品的爆炸性能。     

Intrinsic flame resistance of polyurethane flexible foams: Unexpectedly low flammability without any flame retardant

Virgin polyurethane flexible foams are widely assumed to be highly flammable materials. The flammability of three model polyurethane flexible foams suggests that this may not be universally true. Two of them show unexpectedly low flammability in the limiting oxygen index test and pass flammability tests such as FMVSS 302 and FAR 25.853. Cone calorimetric measurements at 25 kW/m² and 50 kW/m² furthermore show a high resistance against ignition and demonstrate the self‐extinguishing properties of these two virgin, flame‐retardant‐free, polyurethane flexible foams.     

聚氨酯泡沫用有机硅匀泡剂的合成及应用

综述了匀泡剂技术的历史沿革和发展动向,介绍了有机硅匀泡剂在聚氨酯泡沫生产中应用的特点及作用。主要从软泡、硬泡、高回弹三个领域分别介绍了其结构与性能的关系。并结合多年的工作经验对我国在该领域的发展阐述了自己的观点。     

The influence of the stress relaxation and creep recovery times on the viscoelastic properties of open cell foams

The aim of this work is to study the mechanical behavior of flexible polyurethane foams used in cushioning applications. In particular, the differences between slow recovery (SR) and fast recovery (FR) foams are highlighted. To characterize the flexible polyurethane foams, creep and hysteresis tests were performed at different strain rate, stress levels, and temperatures. Significant differences were observed between the SR and FR foams, particularly in terms of residual deformation after unloading, hysteresis area, and creep behavior at different stress levels. Creep compliance at different stress levels was compared with a Voigt‐Kelvin model. Stress–strain loading curves were compared with a phenomenological model originally modified to account for the strain rate dependence. In both cases, it is possible to show that the main differences observed in the behavior of the foams are due to the different relaxation and recovery times of the foams. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers     

Cell distributions in and sound absorption characteristics of flexible polyurethane foams

In this article, the two-dimensional distributions of cells from the cross section of some flexible polyurethane foams were cleared, and the three-dimensional distributions of cells based on Saltykov's theory were estimated further. As a result, it was found that a mean of the two-dimensional distributions of cells was a good linear relation with a mean of the three-dimensional distributions of cells, and it was confirmed that cell structure of the foams which should have been analyzed in the three-dimensional distributions was evaluated by analysis of the two-dimensional distributions fully. It was also found that not only cell number but also cell distribution was necessary in the evaluation of flexible polyurethane foams, and cell diameter was closely related to the sound absorption coefficient in polyester-based flexible polyurethane foams. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65: 1395–1402, 1997