Vectran composite properties. The modulus and coefficient of thermal expansion .
Vectran composite properties. Its aerospace a… Aug 4, 2016 · As a main structure of the stratosphere airship, the typical envelope material is flexible fabric membrane composite. On average, the mode I translaminar fracture toughness for Vectran Herein, blending was used to successfully electrospin composite nanoscale fibers of Vectran with an elastic and biocompatible polyurethane, HydrothaneTM. Jan 1, 2022 · The Mode I and Mode II Interlaminar Fracture Toughness (IFT) of Vectran/Epoxy composite material were investigated using the Double Cantilever Beam (DCB) and 4 End Notched Flexure (4ENF) methods Abstract: Hybridization of carbon fiber composites can increase the material damping of composite parts. Excellent thermal properties simplify fabric processing steps such as scouring, coating, and seaming. It became apparent that the load required to propagate a crack within a CT The present study is focused on the preparation and characterization of new single-polymer composites based on liquid-crystalline fibres. WHAT IS KEVLAR®? Kevlar® is an organic fiber in the aromatic polyamide family. Composites were obtained with two commercial wholly aromatic polyester liquid-crystalline fibres (Vectran M and Vectran HS) having the same chemical composition but markedly different physical properties. Apr 13, 2021 · As a company, TAY srl is proud to produce stretch broken yarns and composite yarns using 100% of Vectran or mixed with other fibers or filaments. However, they are susceptible to degradation and undergo structural changes when exposed to ultraviolet (UV) irradiation in service. In addition, the proposed constitutive equations Vectran™ LCP (Liquid Crystal Polymer) fiber boasts exceptional physical properties, making it a highly desirable fiber. Oct 15, 2018 · The mode I fracture toughness associated with fibre tensile failure was investigated for a Vectran/MTM57 composite system. Vectran™ is a high-performance multifilament yarn spun from liquid crystal polymer (LCP). Sep 26, 2017 · Is Vectran™ the fiber you are looking for? Learn more about the characteristics of Vectran™ fiber and see if its right for your application. Jun 1, 2021 · The present research aims to evaluate the impact performance of novel non-crimp fabrics Vectran/Epoxy composite laminates under low and high velocity impact loading conditions. The impact performance is also compared with GF/Epoxy Hybridization of carbon fiber composites can increase the material damping of composite parts. Dec 31, 2021 · Abstract Hybridization of carbon fiber composites can increase the material damping of composite parts. The differences within the mechani-cal properties of conventional injection moulded plaques and pre-generated micro composites generated by using the twin extrusion process are studied for various May 25, 2021 · The aim of this paper is to present a plane-stress damage model based on the Classical Lamination Theory (CLT), developed for polymer fibre-based composite. The proposed numerical model utilises a damage mechanics methodology coupled with fracture mechanics to predict composite failure, particularly under quasi-static and dynamic loadings. Therefore, composites in hybrid lay-up modes were manufactured from Vectran, Kevlar and aluminum fiber-woven fabrics through a vacuum assisted resin transfer molding. Fabric performance benefits from VECTRAN™ include: Key Jun 1, 2025 · Enhancing the electrical conductivity of carbon-fibre reinforced polymer (CFRP) composites without significant impact to weight or degradation of mechanical properties has great potential for lightning strike protection and electromagnetic interference shielding in aerospace applications. A vibration damping measurement system and comparison of vibration damping characteristics for glass fiber, carbon fiber, aramid fiber, and Vectran fiber are found in these figures. Vectran has been used in space missions, such as the Mars Rover’s airbags, while Dyneema is used in ballistic protection and as a composite material for lightweight armor. As a fabric membrane composite, the experimental results indicate that the nonlinearity characteristic of the on-axial specimen is not obvious under uniaxial and biaxial tension. Jan 1, 2019 · Preliminary tests carried out on the monolithic S2-glass composite and intralayer fibre hybrid T700 carbon/Vectran composite showed that an array of typical CT specimen geometries failed through modes FM1 and FM6 due to the low compressive strength and modulus of this system. Jan 22, 2025 · Epoxy composites play a crucial role in modern materials technologies, with their exceptional properties such as high strength and thermal and chemical resistance, making them ideal for a wide range of industrial applications, including aerospace, automotive, construction, and energy. The finish is applied at a target of 0. Yudhanto and others published Mechanical Properties of Vectran-Stitched Composites: Numerical Simulation and Experimental Validation | Find, read and cite all the Table 2 in Appendix A reports material properties for Vectran with a direct comparison to Kevlar 49 as reported by available literature. For the lower interfacial shear strength of polymeric fibers, the Weibull modulus decreases as interfacial shear strength increases. Sep 1, 2023 · The establishment of Vectran fiber-based composites was started through a two-step approach by incorporating Vectran fibers in the Vectran matrix. Jun 1, 2021 · Request PDF | The impact performance of Vectran/Epoxy composite laminates with a novel non-crimp fabric architecture | The present research aims to evaluate the impact performance of novel non In composite applications, Vectran™ offers a unique balance of properties rarely found in synthetic fibers: minimal moisture regain, thermal stability, and excellent impact resistance. Its break strength surpasses that of other conventional fibers, exhibiting remarkable resistance to stretching or tearing. Vectran fibers are used as reinforcing (matrix) fibers for ropes, electrical cables, sailcloth, and advanced composite materials, professional bike tires, and in electronics applications. Type 150 finish is a textile processing finish designed to lubricate the Vectran fiber for weaving and knitting processes. 1. It is The properties shown corroborate the above stated analysis for the superior response of the Vectran-based hybrid composites. The composite fibers (HVC) were examined as a function of the mixing ratio of the polymers and evaluated on the bases of fiber formation, morphology, thermal properties, and mechanical Apr 26, 2021 · 3. The insertion of the yarns is usually done when the fibers are dry Single-polymer short-fibers composites (SPSFCs) were obtained by including Vectran® bers in a Vectran®matrix. Apr 6, 2021 · The purpose of this study was to manufacture hybrid composites from fabrics with superior ballistic performance, and to analyze their viscoelastic and mechanical response. (2003) developed a CAD model and characterized the static properties of envelope materials consisting of helium barrier, load carrier, and thermal bonding layer, finding that the high stiffness and strength of Vectran-based envelope materials possess wide range temperature applicability from −75 °C to 65 °C. The morphologies, mechanical properties, chemical Sep 15, 2019 · Excellent mechanical, thermal and chemical properties make Vectran™ fibres an attractive material to be used in high end applications. In addition, the proposed constitutive equations Jul 1, 2017 · To fabricate the MPC/UHMWPE/Vectran fiber composite containing ordered fibers, 0. The composite used in present investigation is carbonT800SC-24kf/epoxy XNR6813, and it is structurally stitched by using Vectran®thread (400 denier). High-strength fiber with low moisture absorption and superior dimensional stability. Mechanical properties of Vectran fiber Tedlar PVF film of 38 μm (1. Dec 2, 2021 · Hybridization of carbon fiber composites can increase the material damping of composite parts. The matrix was reinforced with four different high performing woven fabrics based on carbon, Twaron, Vectran, basalt fibres. Apr 26, 2021 · Vectran® fiber has superior high stiffness, strength, modulus, and temperature properties, resistance to chemical reactions, and inherent flame retardancy; at high loads, it shows low creep and May 2, 2021 · This paper summarizes results from over one hundred papers on the influence of stitch parameters on fracture energy, interlaminar strength, and impact characteristics of stitched composite laminates, sandwich composites, and high-temperature composites. On average, the mode I translaminar fracture toughness for Vectran Jan 1, 2021 · Komatsu, K et al. For almost 20 years, IMATTEC has developed a unique Jul 14, 2016 · According to mechanical properties, the failure strength and the damage mode of the envelope material are determined by the strength of the woven fabric and the off-axial angle, respectively. 5 weight % and is easily scoured off with mild soap and water. Type 117 finish is an olefinic finish with a waxy component. Thermoelasticity of the envelope material is first investigated based on a micromechanical model. The fibre is five times stronger than steel and offers a unique combination of outstanding properties. Key points include improved strength, abrasion resistance, and creep performance. The Jul 1, 2015 · The selected composite materials include HTA carbon (CF), E-glass (GF), HM aramid (AF), Vectran® (VF) and Dyneema® fibre (DF) in combination with untoughened and toughened epoxy resin as well as thermoplastic PEEK. g. Colfax, NC We are pioneers and a global leader in sandwich composite technology with more than 80 years of experience. Low-melting temperature yarns based on polyamide and phenoxy in comparison to a What is Vectran? Learn about the properties of Vectran® fiber: its applications, strengths, limitations, finishes & treatments available from Sturges. However, there is little research on a direct comparison of different fiber materials—particularly for carbon fiber intraply-hybrid composites. This never twisted fiber is used in high tensile applications like pressure vessels, recreational, and industrial. Some of these unique properties were discovered through 20 years of research and development of the polymer Vectra™. Hence, the mechanical- and damping properties of different carbon fiber intraply hybrids are analyzed in this paper. The focus of this work is to investigate the photochemical aging behavior and mechanism of the Vectran® fibers. Vectran™ fiber exhibits exceptional strength and rigidity. Coated fabrics have also been used for specialty airbags, e. . A modified compact tension specimen was designed and manufactured to mitigate compressive and buckling failure due to the low compressive properties which are an inherent characteristic of Vectran fibres. 19 mm. This polymer is based on LCP (Liquid Crystal Polymer) technology. Vectran fibres possess a high tensile strength, stiffness, and tensile strain-to-failure ratio – properties which are highly desirable in ballistic protection materials. The material properties of Vectran fiber is summarized in Table 1 [5]. Compared with a pristine material, the post-utilized envelope material degraded severely in the aspects of surface appearance, intrinsic structure, and tensile strength owing to the erosion Sep 15, 2019 · In this study, woven Vectran™ fabric was coated with an antibacterial silver nanoclusters/silica composite coating by means of radio frequency co-sputtering technique. Vectran fiber is an aromatic polyester fiber with excellent physical and chemical properties, such as high tensile strength and resistance to wear, high and low temperatures, impacts, and UV radiation [17], [18], [19], [20], [21]. Thermal Property of Vectran Fiber The melting point of Vectran is around 320°C and shows a significant strength loss at 220°C. It involves the insertion of high-strength yarns (e. for the Mars lander missions. Quasi unidirectional fabrics made of Jan 1, 2017 · Physical properties of LCP fibers meet or exceed that of aromatic polyamides (aramids). Vectran ® exhibits several unique properties such as excellent mechanical properties and high abrasion resistance and so on. Celanese committed to developing a thermotropic (melt processable) LCP in the mid 1970’s and commercialized the Vectra Jun 24, 2024 · Both Vectran and Dyneema are used in aerospace and military applications due to their high strength, low weight, and resistance to harsh environmental conditions. Recognizing the potential applications of Vectran fibers in the construction of composites used in aircraft constructions, a series of tests was carried out on various properties of composites reinforced with Vectran fibers, and additionally assessed the effect of hybridization of laminar composite reinforcement with the base reinforcement of Nov 1, 2022 · The performance of the envelope material greatly affects the quality and service life of the airship [15], [16]. Apr 1, 2017 · Besides the high mechanical properties of fiber itself, interface bonding plays an important role in its contribution to the composite. Vectran™ is a liquid crystal polymer fiber that offers high strength, abrasion resistance, and no moisture regain, yielding excellent outgassing properties. May 21, 2022 · This work deeply reveals the meso-scale tearing mechanism of the envelope and provides a valuable reference for exploring tearing properties of flexible fabric composites. The aim of the present paper is to propose the use of homogenization technique (based on asymptotic expansion homogenization) in predicting the mechanical properties of Vectran-stitched composites. This review article provides a comprehensive overview of the current trends and advancements in epoxy The purpose of this study was to manufacture hybrid composites from fabrics with superior ballistic performance, and to analyze their viscoelastic and mechanical response. Actually, the characteristics of Vectran fiber give us the opportunity to produce a yarn with a very high tenacity (20% more in comparison with the same produced with 100% aramid) and cut resistance, but with better thermal properties than the Feb 1, 2023 · We investigated the tunable mechanical properties of Vectran liquid crystal polymer (LCP) short fiber-reinforced soft composite; we varied the relative foam density and the short fiber loading Aug 30, 2024 · It was found that variations in the bending stiffness of HTP and carbon fibers significantly impacted the composite bending stiffness more than Vectran and Kevlar fibers under pretension during composite formation. Here, for the first time, we investigate the potential application of adhesive bonding techniques for connecting envelope composites. % of reinforcement. Additionally, Vectran™ LCP fiber demonstrates a high modulus, signifying exceptional stiffness and rigidity, which enables it to maintain its shape Oct 15, 2018 · The mode I fracture toughness associated with fibre tensile failure was investigated for a Vectran/MTM57 composite system. Herein, we present an innovative method of through-thickness stitching with soft conductive yarns. Our portfolio consists of high performing, robust, reliable, yet lightweight and sustainable core materials with our main focus on PET foam and Balsa wood. This finish is also useful for other fiber processing steps such as rewinding, twisting and braiding. LCP polymer molecules are stif, rod-like structures organized in ordered domains in both solid and melt states. A thermal annealing treatment was optimized fi to increase the melting temperature, mechanical properties, and thermal stability of pristine Vectran® bers, and a two-step process was successfully developed to con-fi solidate SPSFCs containing up to 30wt. Quasi unidirectional fabrics made of Jun 1, 2021 · The superior ballistic performance of Vectran/Epoxy can be attributed to one inherent characteristic of the composite; the low in-plane shear properties (both strength shear modulus and yield strength) compared to the other two composites, allowing the laminate to absorb more energy by a large Back Face Deflection (BFD). Extensive experimental works consisting of low and high velocity impact tests have been conducted to examine the load-deflection response and the damage mechanism. Using liquid crystal polymer (LCP) technology, VECTRAN™ fiber achieves excellent tensile properties such as high strength and modulus. A Jan 1, 2024 · The airship exhibits great potential as an aerostat; however, the issue of connection in envelope composites, which serve as the primary structural material, significantly hampers its progress. Kuraray acquired VECTRAN™ from Celanese in 2005, and continues to produce this unique fiber in Fort Mill, South Feb 13, 2023 · We investigated the tunable mechanical properties of Vectran liquid crystal polymer (LCP) short fiber-reinforced soft composite; we varied the relative foam density and the short fiber loading ratio. Sep 1, 2013 · Vectran ® fibers are widely used in military and aerospace industries as high performance fibers. The microstructures revealed well-defined pores, matrices, and short fibers. Due to the relatively low compressive strength of Vectran material (<10% of its tensile properties), specimens were hybridised by over wrapping Vectran/Epoxy with T800s/M21 to prevent Vectran™ LCP fiber is unique in regards to other materials in that it provides a balance of properties rarely found in synthetic fibers: minimal moisture retention, thermal stability, and excellent impact resistance. A novel specimen geometry, named the ‘Notched Curved Compact Tension’ (NCCT) specimen (due to its geometrical Vectran is a Thermotropic Liquid Crystal Polymer (TLCP) based fibre which possesses similar mechanical behaviour to Kevlar fibres. The successful deposition of the silver nanoclusters embedded in the silica matrix of the composite coating was confirmed by morphological, compositional and structural analysis. Mar 15, 2017 · Abstract In this work, thermoplastic composites based on poly (ethylene 2,6-naphthalate) (PEN) have been investigated with the aim to elucidate the effect of temperature on static and impact properties. Mar 20, 2023 · Vectran® and its properties The raw material Vectran® is the property of the Japanese company Kuraray and is processed by IMATTEC. Pound for pound, Vectran™ fiber is five times stronger than steel and ten times stronger than aluminum. Jan 15, 2021 · Seeing the potential applications of Vectran fibers in the structure of materials used in aircraft structures (e. , Kevlar, carbon, Dyneema, or Vectran) into the fiber–matrix composite system in the through-thickness direction. In addition, the proposed constitutive equations Welcome to Kuraray VECTRAN™ Pound for pound, VECTRAN™ LCP fiber is five times stronger than steel and ten times stronger than aluminum. Several adhesively bonded joints based on Vectran-based envelope Sep 1, 2006 · The thickness was measured to be 0. It was laminated to the load carrier fabric by polyurethane Vectran is a high-strength liquid crystal polymer fiber offering exceptional flex fatigue resistance, perfect for applications needing crystal polymer materials. The method resulted in increased tensile modulus (up to 161%) and a decreased elongation at break, with fiber breaking as the primary fracture mechanism [63, 64]. 1 vol% of Vectran fibers with a length of 120 mm were directionally arranged along the length direction of the specimens before the hot-pressing procedure. Quasi unidirectional fabrics T700S DATA SHEET Highest strength, standard modulus fiber available with excellent processing characteristics for filament winding and prepreg. However, the primary advantages of LCP over competitive high-strength fibers are durability to abrasion, flex–fatigue resistance, and chemical/dimensional stability, for example, to repeated industrial wash cycles. Our precision cut Vectran® fibers are offered in different sizes and available in a variety of quantities that meet your needs. Jan 15, 2021 · Request PDF | Properties of multi-layered polymer composites with Vectran fiber reinforcement | or several decades, there has been a particular interest in the use of composite materials in the Aug 17, 2016 · Vectran ® is a high-performance multifilament yarn spun from liquid crystal polymer (LCP) which is the only commercially available melt spun LCP fiber in the world. VECTRAN ™ fiber is available in a variety of sizing options. For the materials tested in this research, premature compressive and buckling failure occurred within the composites containing S2-glass and Vectran, where considerably lower (about 50% for the S2-glass com-posite and 11% for the Vectran composite) compressive strength re-lative to tensile strength was observed. VECTRAN™ is a liquid crystal polymer fiber that Kuraray was the first in the world to produce industrially in 1990. The tensile properties of VECTRAN™ LCP fibers enable lightweight reinforcement and ultra-thin scrims and veils. Sep 30, 2024 · The results show that the Weibull modulus decreases as the tensile modulus, strength, and inverse of the failure strain increase. 5 mil) thickness was selected for the helium barrier and the UV radiation protection. The stitch density of current specimen is 11. The modulus and coefficient of thermal expansion Dec 2, 2021 · Hybridization of carbon fiber composites can increase the material damping of composite parts. Jun 21, 2025 · The fusion of Vectran and Kevlar creates next-gen hybrid fabrics with unmatched strength and durability, revolutionizing industries—but what makes them truly unique? Vectran™: LCP Vectran™ is a high-performance liquid crystal polymer (LCP) fiber offering a balance of properties unmatched by other performance fibers. Notably, they also show superior damage tolerance by exhibiting a higher residual fracture stress after the main peak, as shown in Table 2. Vectran™ is used in a wide range of applications. IMATTEC, as a specialist in advanced technical textiles, has chosen to promote Vectran® for its many qualities and high levels of performance. Nov 21, 2022 · A non-linear regression function is used to predict the tensile properties of epoxy and glass/epoxy composites at both low and medium strain rates regimes. In this article, first of all, we explain the characterization of Vectran®. High-stiffness yarns were less influenced by increasing pretension during composite fabrication. The interfacial shear properties were also examined using the microdroplet composite. Shop today! Sep 1, 2018 · Development of a Novel Compact Tension Specimen to Mitigate Premature Compression and Buckling Failure Modes within Fibre Hybrid Epoxy Composites Jul 9, 2022 · The effects of stitching types (trajectory of stitching), stitch fiber materials, and the twist of stitches on interfacial shear, short-beam strength, and interlaminar fracture toughness of three-dimensional (3D) woven composite/titanium alloy hybrid broad were Jul 2, 2025 · Supplier directory search3A Composites / Baltek Inc. The high-low alternated temperature of the stratosphere has a great influence on the mechanical property of the envelope material. Hence, the Heβ et al. Aug 21, 2011 · PDF | On Aug 21, 2011, A. 1,2 from publication: Combined effects of kink bands and hygrothermal conditioning on Jan 1, 2022 · The Mode I and Mode II Interlaminar Fracture Toughness (IFT) of Vectran/Epoxy composite material were investigated using the Double Cantilever Beam (DCB) and 4 End Notched Flexure (4ENF) methods, respectively. One such method that has recently attracted interest is the stitching technique. However, there is little research on a direct comparison of different fiber materials Damping Properties of Hybrid Composites Made from Carbon, Vectran, Aramid and Cellulose Fibers Hauke Kröger, Stephan Mock, Christoph Greb and Thomas Gries Composites Part A: Applied Science and Manufacturing, 2007 In order to achieve a superior overall mechanical performance of composites based on stitched preforms for demanding aircraft applications, innovative thermoplastic stitching yarns are comparatively evaluated in carbon fibre-reinforced epoxy composites. For the Mars Pathfinder task in 1997, Vectran can be tested at low temperature (−62 Aug 18, 2023 · The mechanical performance and structural evolution of a flexible laminated composite envelope material after 5 years of service were investigated by uniaxial tensile test and interfacial peeling test. elements exposed to erosion), a series of tests of various properties of Vectran fiber reinforced composites was carried out. In particular, single-fibre tensile tests performed Oct 1, 2006 · The present study is focused on the preparation and characterization of new single-polymer composites based on liquid-crystalline fibres. The unique properties and distinct chemical composition of wholly aromatic polyamides (aramids) distinguish them—and especially Kevlar®—from other commercial, man-made fibers. Due to the relatively low compressive strength of Vectran material (<10% of its tensile properties), specimens were hybridised by over wrapping Vectran/Epoxy with T800s/M21 to prevent Apr 1, 2015 · Various methods have been developed to alleviate delamination in composites. Vectran™ − for the most demanding applications Vectran™ is Kuraray’s high-performance multifilament yarn spun from liquid crystal polymer. Oct 1, 2020 · Regarding the application of Vectran™ fiber, researchers [18] consider that this material may be one of the fibers that could compensate for carbon deficiencies as a composite, combining carbon resistance with energy absorption or vibration damping of Vectran™ properties. In this article, we firstly show Vectran ® and its several properties, and then we introduce recent Jan 15, 2021 · Seeing the potential applications of Vectran fibers in the structure of materials used in aircraft structures (e. We derived the compressive stress–strain responses and stress relaxations and then performed dynamic mechanical Vectran has a broad range of characteristics including high strength and high modulus (tensile properties), low moisture absorbency, high dimensional stability (creep properties), excellent thermal properties, fiber to fiber abrasion resistance, cut resistance, chemical resistance, and ultraviolet light resistance. It is the fibre of choice where others fail to meet performance requirements. Please contact a VECTRAN ™ sales representative to assist with finish selection for your unique application. Table 1. The aim of this paper is to present a plane-stress damage model based on the Classical Lamination Theory (CLT), developed for polymer fibre-based composite. Cut, slash, and abrasion resistance further improve the performance of protective textiles compared to traditional fibers. The great heat resistance of the Vectran fiber creates a high LOI, low-smoke generation and also a low thermal shrinkage in hot air, boiling water, and laundry process [29]. Here, we proposed to introduce a thermotropic liquid crystalline copolyester (TLCP) fiber, with a trade mark “Vectran”, into cement composite. [3] proposed a finite element unit-cell model to estimate tensile and compressive properties of stitched composites. Therefore, composites in hybrid lay-up modes were manufactured from Vectran, Oct 1, 2006 · The present study is focused on the preparation and characterization of new single-polymer composites based on liquid-crystalline fibres. Jan 1, 2022 · The Mode I and Mode II Interlaminar Fracture Toughness (IFT) of Vectran/Epoxy composite material were investigated using the Double Cantilever Beam (DCB) and 4 End Notched Flexure (4ENF) methods, respectively. Vectran M for high impermeability, excellent property retention & low moisture absorption applications. The specimens were consequently analyzed using static Vectran HS for high strength, vibration damping, low moisture absorption applications. Secondly, we introduce the latest research of crystal structure of Vectran® and its composite application. 3 days ago · Flexible composites using coated Vectran fabrics are used in many technical end uses such as rapidly deployable inflatable structures, lighter-than-air craft, and air-supported tension members. VectranTM ofers a balance of properties unmatched by other high performance ibers. Impact resistance comparison of high-performance fabrics Impact Energy (inch lbs Nov 21, 2022 · The aim of this paper is to present a plane-stress damage model based on the Classical Lamination Theory (CLT), developed for polymer fibre-based composite. Jan 5, 2023 · Long-term illumination can damage the mechanical properties of high strength fiber composites, resulting in the material aging and loss of mechanical … Download scientific diagram | Mechanical properties of various Vectran TM fibers and Kevlar Õ KM2-600 tows. Although many materials have been used to prepare composite fibers, mechanical characterization of soft composites reinforced by LCP short fibers has received little attention. Here, we investigated the tunable mechani-cal properties of Vectran LCP short fiber-reinforced soft composites. Vectran fiber is a super high-performance fibre that is melt-spun from liquid crystal polymer in comparison of outstanding mechanical properties at high temperatures, excellent chemical resistance, inherent flame retardancy, high stiffens, very low creep mean that will not stretch with time, good weather ability, and good thermal resistance [7]. Using the Dynatup Impact Test, Vectran™ performed far better than competitive materials. Composites were obtained with two commercial wholly aromatic polyester liquid-crystalline fibres (Vectran® M and Vectran® HS) having the same chemical composition but markedly different physical properties. qtxwfhmqrbmpuhrhskgmqqsuouxvgnawkhfilrccliueuzoflohskmp