除尘脱硝一体化玻纤/P84复合毡覆膜滤料制备及性能研究

介绍了除尘脱硝一体化玻纤/P84复合毡覆膜滤料的制备和性能研究。通过基材的结构设计等关键技术研发,制备了除尘脱硝一体化玻纤/P84复合毡覆膜滤料,性能测试结果为颗粒物排放4.36 mg/m³,氮氧化物排放38 mg/m³,结果优于环保要求。     

芳纶纤维+聚酰亚胺复合滤料的性能测评

将国产高性能芳纶纤维填充部分进口聚酰亚胺纤维通过特殊结构设计经针刺工艺生产出新型高性能复合滤料(简称FJ复合滤料),经过系统测试与分析对比,FJ滤料各项性能可以与P84滤料相媲美,且具有很高的性价比;与某国产玻纤覆膜滤料相比具有很大的技术优势。     

玻纤针刺毡在高炉煤气除尘上的应用

玻纤针刺毡在高炉煤气除尘上的应用南京玻璃纤维研究设计院朱钰之１高炉煤气除尘用玻纤针刺毡滤料简介玻纤针刺毡是由单丝直径为５～６μｍ的无碱玻璃纤维毡层和基布,经针刺联结和化学粘合,使毡层与基布牢固结合在一起而构成的高效过滤材料。由于毡层纤维随意取向,有三...     

玻纤毡性能及其应用

本文首先简要介绍了无碱玻璃纤维增强材料的分类和主要特性。着重介绍了玻纤短切毡的性能及其在汽车车顶内饰、干式变压器、卫生沽具等方面的应用；玻纤连续毡的性能及其在拉挤型材、RTM工艺等方面的应用；玻纤针刺毡的分类和在GMT方面的应用；最后，介绍了近几年出现的玻纤连续针剌复合毡在复合材料方面的应用。     

含胶量对玻纤布覆膜滤料的性能影响研究

玻纤布覆膜滤料一般需预先进行纤维表面化学浸渍处理,处理的目的在于弥补玻纤滤料自身的缺陷,同时进一步提升滤料的综合性能。从处理后纤维表面的含胶量对滤料的断裂强力、覆膜前后的透气率、耐折性能、纤维表面处理剂包覆效果进行研究。结果显示当含胶量由2%提升至8%时,滤料的断裂强力与耐折性能都显著提升且滤料具有较好的透气性与处理剂包覆效果。当含胶量提升至8%以上,上述几种性能都略有下降且纤维表面处理剂已造成局部堆积的现象。     

水泥窑协同处置用新型覆膜滤料性能研究

为满足水泥窑协同处置固废技术的需求,开发了新型耐酸玻璃纤维/P84复合毡覆膜滤料(以下简称F-NS覆膜滤料)。对比研究了该滤料与普通玻璃纤维/P84复合毡覆膜滤料(以下简称常规滤料)的性能,结果表明该滤料断裂强力及耐酸性能明显优于常规滤料。对协同处置水泥窑尾粉尘进行了粒径分析,并测试了耐酸滤料的孔径分布,最后利用粉尘过滤效率测试系统对F-NS覆膜滤料进行了过滤性能测试,测试结果均表明该滤料拥有良好的过滤性能。     

土工格栅拉伸速率试验分析

通过对土工格栅(塑料格栅和玻纤格栅)在不同速率下进行拉伸试验,得出拉力—变形曲线及2%,5%应变和峰值拉伸强度、最大断裂力时的延伸率等数据。经过对数据分析和曲线拟合,得出格栅受拉伸速率影响的规律,并最终选定合适的室内拉伸试验速率。结果表明,塑料格栅和玻纤格栅,纵、横向的断裂拉力随着拉伸速率的增加而增大,延伸率随着拉伸速率的增加而减小。塑料格栅和玻纤格栅,纵、横向同等规格时,纵向拉伸强度总体大于横向拉伸强度。     

八家媒体齐关注长枪翘炮“瞄准”PM2．5的克星—膜材料公司获奖项目

近日，众多媒体单位从江苏省科学技术奖励大会上获悉，中材科技膜材料公司“高效过滤工业粉尘用复合针刺毡覆膜滤料的研制及应用”荣获2012年度江苏省科学技术二等奖，了解到该项目研制的复合针刺毡覆膜滤料，采用多层叠加空问结构技术，     

高温过滤材料的现状与发展趋势

介绍了随着国家对环保标准的不断提高,袋式除尘器的发展与应用,阐述了袋式除尘器的核心--高温滤料以及纯玻纤滤料种类、性能和优缺点,芳纶纤维、PPS纤维、P84纤维、PTFE纤维的性能及它们分别与玻璃纤维混杂复合后其复合滤料的性能和优缺点。随着新技术和新材料的应用,高温袋式除尘技术的应用不断发展。     

过滤用玻纤复合针刺毡的研发

介绍了玻纤针刺毡的概念、特点及加工工艺。着重介绍了新型过滤材料一玻纤复合针刺毡的原料选择和加工工艺的确定。     

Oriented short glass fiber composites. III. Structure and mechanical properties of molded sheets

Oriented short fiberglass mats prepared by the ERDE converging flow technique of fiber/glycerine dispersions were studied. Fiber orientation distribution in mats, prepregs and molded sheets were investigated by optical and X-ray techniques. Longitudinal and transverse fracture surfaces of short fiberglass/epoxy molded sheets were analyzed. The effect of fiber length on tensile properties was also studied. The experimental results obtained on longitudinal, transverse, and off-axis tensile modulus and ultimate strength were compared with classical elastic equations for continuous reinforcement.     

装饰材料用阻燃柔性复合薄木的制备及力学性能

以厚度为0.35～0.40 mm的榉木为薄木基材、棉网格布为增强材料和PES(聚醚砜)型HMA(热熔胶)为胶粘剂,选用BL-环保阻燃剂制备装饰材料用阻燃柔性复合薄木;然后以拉伸强度、剥离强力和表观性能为衡量指标,以热压压力、热压温度、含水率和胶膜厚度为试验因素,采用正交试验法优选制备柔性复合薄木的最优方案。结果表明:以PES型HMA作为薄木/棉网格布复合用环保型胶粘剂,其不仅与BL-环保阻燃剂有很好的相容性,而且可避免脲醛树脂胶粘剂的甲醛释放等问题;增强型薄木与非增强型薄木相比,前者的横纹拉伸强度显著提高,并且前者不再表现为脆性特征;柔性复合薄木热压工艺条件的最优方案为热压压力0.7 MPa、热压温度125℃、含水率12%和胶膜厚度0.10 mm。     

布管法双向自增强管材连续扩胀装置的实验研究

采用布管法连续扩胀装置加工了聚氯乙烯（PVC）环向扩胀管和双向自增强管。实验结果表明,直径从40 mm扩胀到50 mm的环向扩胀管的环向拉伸强度提高了23 %～25 %,环向弹性模量提高了12 %。双向自增强PVC管的环向拉伸强度提高了26 %～33 %,弹性模量提高了30 %～33 %。通过对不同轴向拉伸比的双向自增强管的拉伸强度比较发现,随着轴向拉伸比的增加,环向拉伸强度逐渐提高。，环向弹性模量提高12%。双向自增强PVC管的拉伸强度提高了26%-33%，弹性模量提高了30%-33%。通过对不同轴向拉伸比双向自增强管的拉伸强度比较发现，随着轴向拉伸比的增加，环向拉伸强度逐渐提高。     

Relationship between processing,microstructure, and mechanical properties of injection molded thermotropic LCP

A commercial thermotropic liquid crystalline polymer (LCP), Vectra A950, was injection molded into rectangular sheets of thickness ranging from 1 to 4 mm. By changing the thickness of the mold, the shear rate experienced by the TLCP melt in the mold could be varied. The 1‐mm test sample was highly anisotropic while that with larger thickness (4 mm) was less anisotropic. X‐ray diffraction profile at various depths for each of the test sample corresponded to the degree in the fiber orientation present in the test samples. The anisotropy can be described macroscopically by measuring the tensile strength and modulus in the longitudinal and transverse direction. The ratio between the longitudinal and transverse property decreases proportionally to the thickness of the test sample. This reduction corresponded to the reduction in the shear field as the thickness of the mold was increased. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 1713–1718, 2003     

Mechanical Properties of Melt-Grown Alumina–Yttrium Aluminum Garnet Eutectics up to 1900 K

Alumina/yttrium aluminum garnet (YAG) eutectic rods of 1 mm in diameter were grown by the laser-heated floating zone method at different rates to obtain microstructures with the same morphology but of very different domain size. The mechanical properties of the rods (hardness, toughness, strength) were measured at ambient temperature in the longitudinal and transverse directions and, in addition, the longitudinal flexure strength was determined up to 1900 K. The fracture resistance and the hardness of the eutectics at ambient temperature were isotropic and independent of the domain size. On the contrary, the longitudinal strength was significantly higher than the transverse one and increased linearly with the growth rate, reaching almost 2 GPa in the rods grown at 750 mm/h, which presented a submicrometer homogeneous microstructure. The critical defect size was equivalent to that of Al₂O₃ and YAG domains in the microstructure, and the strength was proportional to the inverse of the square root of the domain size. In addition, the strength retention of the eutectics was remarkable, and the rods with the finest microstructure withstood 1.53 GPa at 1900 K. The moderate reduction in strength at very high temperature was induced by the homogeneous coarsening of the microstructure.     

Puncture of a fiberglass laminate during hypervelocity impact

The limiting thickness of a fiberglass laminate target during a hypervelocity (3–7.3 km/sec) impact by steel and glass particles 0.8–2 mm diameter. It is shown that the strength of the target significantly affects the limiting penetration thickness, and the area of secondary damage is larger by two orders of magnitude than the area of the hole. The fracture of a uniaxial fiberglass laminate is characterized by a large difference in the transverse dimensions of the damage regions, which is caused by the cnisotropy of the mechanical properties of the material.Novosibirsk. Translated from Fizika Goreniya i Vzryva, Vol. 28, No. 4, pp. 115–120, July–August 1992.     

Experimental evaluation of reinforcing the single lap joint in both longitudinal and transverse direction under tensile and bending condition

The effect of pins and wires as reinforcing elements in the single adhesive joints under tension and bending has been investigated in this study. Four types of joint specimens were made for this reason. Type one specimen, having no reinforcements and type two having 20 metallic wires of 0.2 mm diameter in longitudinal direction. Type three consist of 6 steel pins having 1 mm diameter in transverse direction. In type four, both the pins in transverse and wires in longitudinal direction have been used to reinforce the joint. After manufacturing of the samples, their tensile and bending properties were investigated. The results show that, pins increase bending strength and toughness during both tensile and bending while metallic wires increase tensile strength and modulus of joint. Overall, the sample with combined reinforcements has the highest tensile and bending properties apart from modulus. Since the weight of the reinforcements used are negligible, the specific properties of the joint has been improved significantly. The tensile specific strength and toughness of combined reinforced joint as compared to simple joint with no reinforcement has been improved by 33.48% and 82.52% respectively. Also in that case, the specific bending strength and toughness are improved by 64.4% and 231.91% respectively.     

环氧树脂/玻璃布/BN导热复合材料的制备与性能研究

采用高温模压成型法制备环氧树脂(EP)/玻璃布/氮化硼(BN)导热复合材料。探讨了BN用量和偶联剂处理对复合材料力学性能、导热性能和介电性能等影响。结果表明:当w(BN)=15%时,复合材料的冲击强度较高;导热性能随着BN用量的增加而增大;当w(BN)=25%时,改性复合材料的热导率为0.901 2 W/(m.K),此时复合材料仍保持较低的介电常数和介电损耗。当BN用量相同时,偶联剂表面处理可有效改善复合材料的力学性能和导热性能。     

基于反射裂缝防治的玄武岩经编纤维布阻裂性能研究

针对沥青路面面层出现的轻度反射裂缝问题,为增强防治措施,本文对玄武岩经编纤维布阻裂性能进行了试验研究。通过冲击韧性试验与动态疲劳试验研究了玄武岩经编纤维布和对照土工合成材料(玻纤格栅、聚酯玻纤布)的防反性能,最后对沥青混合料加铺不同土工合成材料后的抗冲击性能与抗疲劳性能进行了相关性分析。研究结果表明:加铺玄武岩经编纤维布,沥青混合料的冲击韧性可提升70%以上;玄武岩经编纤维布在防治裂缝产生与延缓裂缝扩展方面均表现出了优于玻纤格栅和聚酯玻纤布的能力,在沥青混合料中铺设玄武岩经编纤维布可获得最好的疲劳抗裂性能。铺设土工合成材料后,混合料的冲击韧性与其疲劳寿命相关性较好,采用冲击韧性预估沥青混合料加铺土工合成材料后的抗疲劳性能具有可行性。     

玻璃纤维无捻粗纱布大卷径卷取技术研究

分析了玻璃纤维无捻粗纱布大卷径卷取的特点,介绍了目前各种玻璃纤维无捻粗纱布卷取机的工作原理,采用800 g/m2无捻粗纱布为例对五种机型大卷径卷取试验情况进行了分析,为玻璃纤维无捻粗纱布大卷径卷取设备的选型给出了建议,研究发现表面卷与中心卷相结合的机型是较适宜于玻璃纤维无捻粗纱布大卷径卷取的机型。