Decorative Wood Fiber/High-Density Polyethylene Composite with Canvas or Polyester Fabric

Wood-plastic composite is an environmentally friendly material,due to its use of recycled thermoplastics and plant fibers.However,its surface lacks attractive aesthetic qualities.In this paper,a method of decorating wood fiber/high-density polyethylene(WF/HDPE)without adding adhesive was explored.Canvas or polyester fabrics were selected as the surface decoration materials.The influence of hot-pressing temperature and WF/HDPE ratio on the adhesion was studied.The surface bonding strength,water resistance,and surface color were evaluated,and observation within the infrared spectrum and under scanning electron microscopy was used to analyze the bonding process.The results showed that the fabric and WF/HDPE substrate could be closely laminated together depending on the HDPE layer accumulated on the WF/HDPE surface.The molten HDPE matrix penetrates canvas more easily than polyester fabric,and the canvasveneered composite shows a greater bonding strength than does the polyester fabric-veneered composite.A higher proportion of the thermoplastic component in the substrate improved the bonding.When the hot-pressing temperature exceeded 160°C,the fabric-veneered WF/HDPE panels had greater water resistance,although the canvas fabric changed more obviously in terms of fiber shape and color,compared with the polyester fabric.For the canvas fabric,140°C–160°C was a suitable hot-pressing temperature,whereas 160°C–180°C was more suitable for polyester fabric.The proportion of the thermoplastic component in the composite should be not less than 30%to achieve adequate bonding strength.

Mechanical Properties of Glass Fiber/Unsaturated Polyester Resin Composite Water Collector

The water collector is operated in the humid and hot environment of the cooling tower all the year round.It also needs to carry part of the weight of water and silt.Therefore,it is particularly critical to optimize the material of the water collector and improve its mechanical properties.Polyester,a general term of polymer obtained from polyols and polyacids,is a kind of engineering plastics with excellent properties and wide applications.Glass fiber is a reinforced plastic reinforcement material,and the biggest characteristic of it is the high tensile strength and good heat resistance.In this paper,glass fiber reinforced polyester resin composite material is prepared,its tensile properties and bending properties are tested,and the performance of the imported material JK2020B is compared and analyzed.The results show that the elastic modulus along the fiber direction is relatively high,but the interlayer force in the direction of thickness and width is very small.This review provides a guidance for production process.

Performance Improvement of Kenaf/Glass Polymer Hybrid Composites by Effective Application of Fish Scale Powder as Filler:A Novel Approach

Modern technology for developing new items made from renewable resources is becoming more and more popular as a result of rising environmental concern.Recently,contemporary polymer composites have included the hybridization of natural fibers with synthetic ones,along with the inclusion of a variety of biowaste filler for developing sustainable goods.In this work,the kenaf/glass hybrid polyester composites are strengthened by the addition of fish scale(FS),which is taken from the fishs outermost layer of skin.Five different stacked-order laminates,such as KKKK,KGKG,GKKG,KGGK,and GGGG,are fabricated by using the hand lay-up method with four different weight concentrations of filler content:0%,5%,10%,and 15%.Mechanical possessions such as tensile,flexural,impact strength and micro-hardness have been evaluated through experimentation in accordance with ASTM standards.The experimental findings revealed that,the tensile strength and micro-hardness value of KGKG laminates with 15wt% of FS filler are found to be maximum of 118.72 MPa and 17.82 HV respectively which are 39.67%and 26.11%greater than that of KGKG laminates without FS filler.However,the flexural and impact strength of same laminates with 10 wt% FS filler exhibited a maximum value of 142.77 MPa and 62.08 kJ/m^(2).In order to corroborate its applicability for structural and building materials in open environment,the dimensional stability of the composite has been studied through moisture absorption test.The influences of FS filler loading on dimensional stability and resistance to moisture absorption capacity of laminates are also investigated.The experimental results reflected that the addition of FS-filler has significantly improved the dimensional stability of the laminates in moist environment by reducing the moisture absorption tendency.To further support the mode of failures,a fractography investigation of fractured surfaces was conducted.

Humidity Diffusion on Jute/Polyester Laminated Composites and Its Effects on Mechanical Properties

Jute is a natural fiber widely used as reinforcement in composites due to its high tensile strength and stiffness,but they can easily absorb water and have their physical properties compromised.The water absorption properties of jute/polyester composites are evaluated according to ASTM D 570 and the effect of humidity in the composite mechanical behavior is also analyzed.The composite showed a pseudo-Fickian behavior and gained 13.37%in weight after the test.It also lost tensile strength and elasticity modulus,and increased its specific deformation.Scanning electron microscope images showed that wet specimens were more subject to cracks,voids and fiber pullout than dry specimens.Failures produced by water diffusion in composite and polymer plasticization,added to breakdown in the fibers’cellulosic structures,justify the change in mechanical properties due to water absorption.

Synthesis and Application of Easy Hydrolysis Degradable Polyester

An easy hydrolysis degradable polyester (EHDP) is synthesized; the fiber produced from which can be hydrolyzed by dilute basic solution easily. The properties of these kind polyesters are measured. The results show that this kind polymer is suitable to be spun into filament The EHDP can be spun into staple fiber and manufactured into non-woven fabric. This fabric is used as disposable clothes. In composite spinning, the PET (polyethylen glycol terephthalate) or PA (polyamide) is used as continuous phase, and EHDP used as dispersed phase. Then the fabric of this kind fiber is treated by basic solution; the ultra-fine fiber fabric is obtained.The fineness of the fiber is about 0.045 dtex. In blend spinning, EHDP is mixed with polypropylene (PP) to produce hollow fiber with micro-holes in radical direction. This fiber is a usable material in filter especially in medical use.

Fabrication and Characterization of Glass Fiber with SiC Reinforced Polymer Composites

Glass Fiber Reinforced Polymeric (GFRP) Composites are most commonly used as bumpers for vehicles, electrical equipment panels, and medical devices enclosures. These materials are also widely used for structural applications in aerospace, automotive, and in providing alternatives to traditional metallic materials. The paper fabricated epoxy and polyester resin composites by using silicon carbide in various proportions along with GFRP. The hand lay-up technique was used to fabricate the laminates. To determine the properties of fabricated composites, the tensile, impact, and flexural tests were conducted. This method of fabrication was very simple and cost-effective. Their mechanical properties like yield strength, yield strain, Young’s modulus, flexural modulus, and impact energy were investigated. The mechanical properties of the GFRP composites were also compared with the fiber volume fraction. The fiber volume fraction plays a major role in the mechanical properties of GFRP composites. Young’s modulus and tensile strength of fabricated composites were modelled and compared with measured values. The results show that composites with epoxy resin demonstrate higher strength and modulus compared to composites with polyester resin.

Fabrication and Properties of Graphene Oxide/Sulfonated Polyethersulfone Layer-by-layer Assembled Polyester Fiber Composite Proton Exchange Membranes

Using the hydrogen-bonding interaction between graphene oxide（GO） and sulfonated polyethersulfone （SPES）, we constructed the multilayer structure of GO and SPES on the polyester tiber mats via layer-by-layer self-assembly. In each self-assembled layer, sulfonic acid groups are arranged along the a^s of fiber, which provides the long-range proton transmission channels, promoting the rapidly proton conduction. The performances of the composite membranes based on SPES and multilayer assembled polyester fiber mats were studied. The results show that the proton conductivity of composite membranes increases with the increasing assembly layers. At the same time, the mechanical properties and methanol-resistance of the composite membranes were obviously improved.

Mechanical and Microstructural Characteristics of the Fiber-Reinforced Composite Materials

Composite fiber materials are superior materials due to their high strength and light weight. Composites reflect the properties of their constituents, which is proportional to the volume fraction of each phase. There are different fiber reinforcement types and each affects its flexural, tensile and compression strength. When selecting a composite for a specific application, the forces excreted on the composite must be known in order to determine the reinforcement type. Unidirectional fiber reinforcement will allow very strong load resistance but only in one direction where as a random orientated fiber reinforcement can resist less load but can maintain this quota in all directions. These materials are said to be anisotropic. Certain composite fibers, taking into consideration their weights, are physically stronger than conventional metals. In this paper, specific light-weight components with different reinforcement types, volume fraction and phase content were newly composed, tested, characterized and evaluated. By applying a novel method, a model which including the various matrix compositions, reinforcement types of each specific component, and its dual-properties was developed according to the structure characteristics. It was shown that certain reinforced composites such as carbon fiber, tend to be much stronger than metals when taking account its weight ratio. The outcome of this research lays a good foundation for the further carbon fiber-based material design work.

Mechanical Property and Morphological Analysis of Polyester Composites Reinforced with Cyperuspangorei Fibers

In the present work,polyester composites reinforced with a newly identified Cyperus pangorei fiber(CPF)were developed by compression moulding technique.The effects of varying fiber content and fiber length on the mechanical properties of the Cyperus pangorei fiber reinforced polyester composites(CPFCs)such as tensile,flexural,and impact properties were studied.Mechanical strength of the CPFCs increased with fiber length up to 40 mm beyond which a reverse trend was observed.Based on the test results,it was concluded that the critical fiber length and the optimum fiber weight percentage were 40 mm and 40 wt%respectively.The maximum increase of 164%and 117%were found for the tensile and flexural strength of the composite with 40 mm fiber length and 40 wt%fiber content,respectively.On the other hand,a 64%increase in impact strength was noticed for the optimum case.The increasing contact surface between the fiber and the polyester matrix in optimum condition can restrict the probability of fiber pullout and in turn can make the composite carry more load.The chemical structure of CPF was also analyzed using Fourier-Transform Infrared Spectroscopy(FTIR)spectrum.The morphological analysis of fractured samples was performed using Scanning Electron Microscopy(SEM)to understand the interfacial bonding between CPFs and polyester matrix.The optimal composite can be a suitable alternative in the field of structural applications in construction and automobile industries.

Flexural Properties of Weft Knitted Fabric Reinforced Composites

Several different kinds of weft knitted fabrics from glass fiber yarns were used as reinforcement to make fabric/polyester composite laminates. Flexural tests were carried out to examine stress- deflection process and compare the mechanical properties in course and wale directions of these composites. The experimental results indicate that the numbers of load-bearing yarn in course and wale direction and the fabric density are the main factors influencing the ultimate tensile strength and initial elastic modulus of specimens.

并列复合中空卷曲抗菌再生聚酯短纤维的制备及性能

为实现废弃聚对苯二甲酸乙二醇酯(PET)的循环再生与升级利用,以废弃PET泡料为原料,制得特性黏度为0.78 dL/g和0.65 dL/g的再生聚酯(r-PET)切片,选用F220A(主要成分为纳米ZnO)和100B(季铵盐型抗菌剂)两种抗菌改性剂,经熔融并列复合纺丝和后整理技术得到两类并列复合中空卷曲抗菌r-PET短纤维。优化了抗菌r-PET短纤维的生产工艺参数,并对其性能进行测试分析,结果表明:在计量泵频率44~46 Hz、纺速1050~1200 m/min、总牵伸倍数3.33倍的条件下,两类抗菌r-PET短纤维均具有良好的可纺性,其中空度接近20%,卷曲数为5个/25 mm;抗菌剂F220A与r-PET可实现热力学互容,且作为基体异相结晶成核剂,有效促进了r-PET结晶;两类抗菌r-PET短纤维对金黄葡萄球菌、大肠埃希菌及白念珠菌的抑菌率均高达99.00%,抗菌效果优异。

常压多色同浴染色新技术在机织物上的应用

从纱线选择、组织结构、色彩搭配、染色工艺、性能测评等方面验证常压多色同浴染色新技术在机织物上应用的可行性。按预期设计要求进行小样试织试染,并对染后机织物的透气性、耐摩擦色牢度和耐皂洗色牢度性能进行了测试。结果表明:不同结构的阳离子改性涤纶和其他纤维交织的机织物能够实现常压多色同浴染色,染料上染率高,染色残液清澈透明,可重复使用;织物的耐摩擦色牢度和耐皂洗色牢度均在4级及以上,样布具有良好的染色牢度;织物透气性好,含有三角形横截面微观结构的新型常压阳离子染料可染涤纶织物比圆形横截面的常规涤纶织物更有利于空气的流通。

再循环棉及涤纶短纤维的成纱性能与面料特征

为解决再循环纤维产品质量差且难以实现高值高效利用的问题,利用转杯纺及其复合纱技术拓宽再循环棉、涤纶短纤维的利用途径,并提高其产品性能。将再循环纤维与原棉、粘胶、涤纶3种常见的短纤维进行混纺,并在此基础上引入不同比例、线密度的涤纶长丝、醋酯长丝、粘胶长丝纺制长丝/短纤包缠复合纱,分析成纱性能。研究发现:添加长丝可有效地提高再循环纤维转杯纺纱线的各项参数,涤纶长丝复合纱的断裂强度(11 cN/tex)优于粘胶长丝复合纱(8.38 cN/tex),醋酯长丝复合纱的断裂强度(8.16 cN/tex)最弱;涤纶长丝复合纱的条干不匀率(9.93%)与醋酯长丝复合纱(9.79%)差异不大,粘胶长丝复合纱的条干不匀率(10.15%)最差;长丝/短纤包缠复合纱的毛羽明显少于混纺纱,不同长丝之间毛羽差异不大;纱线性能的提高对织物断裂物理指标和吸湿速干性能均有不同程度的改善。

阳离子改性蜂窝状中空涤纶纤维的染色工艺优化

阳离子改性蜂窝状中空涤纶纤维具有良好的导湿效果和易染性。试验采用三支分散型阳离子染料对阳离子改性蜂窝状中空涤纶纤维进行染色。结果表明,当染液pH为5、染色温度为100℃、浴比为1∶10时,染色纤维的K/S值最大。三支染料上染阳离子改性蜂窝状中空涤纶纤维的上染速率曲线变化趋势相近,配伍性较好,可用于拼色染色。

阳离子改性涤纶/腈纶同色性能研究

迭代涤纶(ITER-C)/腈纶一浴染色容易出现色差。测定单组分纤维上染曲线,讨论两种纤维同浴染色的可行性。测试染色温度、pH对两种纤维一浴染色性能的影响。测定两种纤维一浴染色的上染曲线和提升力曲线,进一步探讨了阳离子染料对两种纤维一浴染色的染色效果。结果表明:ITER-C在50℃、腈纶在70℃时,上染率快速上升,100℃后逐渐稳定;ITER-C/腈纶一浴染色时,优化染色温度为105℃、优化染色pH为4.5,阳离子染料在ITER-C上的上染率高于腈纶,染料用量低于4%(omf)时,染料用量越高,纤维同色性越好。

双组分涤纶/玻璃纤维复合隔板的物理性能分析

为探索性能卓越且符合高性能电池使用要求的玻璃纤维复合隔板,将三种规格的双组分涤纶与玻璃纤维制成复合隔板,进行了纤维分散试验,测试了复合隔板的拉伸强度、抗穿刺强度、最大孔径与孔隙率,并与纯玻璃纤维隔板进行比较。结果表明:复合隔板的拉伸强度、抗穿刺强度能够达到纯玻璃纤维隔板的1倍以上,最大孔径可达16.04μm;1.67 dtex双组分涤纶与玻璃纤维制成的复合隔板具有较好的物理性能。在实际隔板生产时,建议双组分涤纶的配比为15%,生产温度为155~165℃。

涤纶POY/FDY复合丝环吹风冷却工艺探讨

以特性黏数0.65~0.68 dL/g的聚对苯二甲酸乙二酯熔体为原料,采用环吹风冷却方式,以两对热辊拉伸生产135 dtex/128 f涤纶预取向丝(POY)/全拉伸丝(FDY)复合丝,探讨了在环吹风冷却下无风区的设置、冷却工艺等对复合丝性能的影响。结果表明:在缓冷加热器温度为290℃,无风区高度为120~140 mm,环吹风压力为30~40 Pa,风筒高度为185 mm的较佳环吹风冷却工艺条件下,生产的涤纶POY/FDY复合丝品质较好;相比侧吹风冷却方式,环吹风冷却方式生产的复合丝的条干不匀率变异系数下降38.9%,产品优等品率提高3.2%,毛丝降等率下降22.1%。

聚酯纤维与抗车辙剂对沥青混合料路用性能的影响

为探究聚酯纤维与抗车辙剂复合掺加条件下的沥青混合料性能改良效果,设计室内试验,分析单掺聚酯纤维、单掺抗车辙剂以及复掺聚酯纤维与抗车辙剂等条件下沥青混合料的抗疲劳性能、水稳定性能、低温性能及高温性能。试验结果显示:相较于单掺聚酯纤维、单掺抗车辙剂组沥青混合料,复掺聚酯纤维和抗车辙剂组的沥青混合料具有更强的高温性能、低温性能和抗疲劳性能,但低温性能和抗疲劳性能相较于单掺聚酯纤维组的提升幅度较小,且疲劳寿命对应力比的敏感性较低。复掺组沥青混合料的水稳定性和单掺组的相比没有明显差异。

废旧涤纶纺织品制备纤维增强复合材料的研究现状

针对废旧涤纶纺织品回收率低、缺乏绿色环保回收涤纶的方式以及再利用手段单一等问题,介绍了国内外废旧涤纶纺织品的回收现状及回收技术;从力学性能、声学性能的角度阐述了回收废旧涤纶纺织品制备纤维增强体复合材料的原理及研究进展,介绍了目前废旧涤纶纺织品制备纤维增强复合材料在建筑、汽车领域的应用,最后总结了涤纶在制备复合材料时存在的问题,为提高废旧涤纶纺织品的回收利用率、废旧涤纶纺织品制备纤维增强复合材料的研究和发展提供参考。