Zhejiang QianXiLong Special Co., Ltd and Longkui New Material Co., Ltd are highly regarded companies located in Yongkang Economic Development Zone, Zhejiang, China. These companies were created by the renowned Qianxi Group, a prominent investment group. QianXiLong Special Fiber (QXL) is an exceptional high-tech enterprise that focuses on research, development, and manufacturing of UHMWPE (Ultra High Molecular Weight Polyethylene) fibers. Our company boasts three plants situated in Yongkang, Longyou, and Shanxi, with a combined capacity of 4000 tons. Our fibers come in a wide range of superfine 8D to 2400D, and even up to 40000D, with high tenacity fibers (tenacity exceeding 42 cN/dtex) being our specialty. On the other hand, Longkui New Material Co., Ltd (Longkui) is a top-tier high-tech enterprise that concentrates on the development of UHMWPE protective materials.
Why Choose Us
Our factory
Zhejiang QianXiLong Special Co., Ltd and Longkui New Material Co., Ltd are highly regarded companies located in Yongkang Economic Development Zone, Zhejiang, China. These companies were created by the renowned Qianxi Group, a prominent investment group. QianXiLong Special Fiber (QXL) is an exceptional high-tech enterprise that focuses on research, development, and manufacturing of UHMWPE (Ultra High Molecular Weight Polyethylene) fibers.
Production capacity
We have 3 manufacturing bases with a total capacity of 4000tons, fast delivery, one-stop service.
Our product
Our fibers come in a wide range of superfine 8D to 2400D, and even up to 40000D, with high tenacity fibers (tenacity exceeding 42 cN/dtex) being our specialty.
Our service
Our companies are committed to continuous improvement and establishing ourselves as trustworthy brands and enterprises. We adhere to the principle of providing customers with better, lighter, and safer products and are dedicated to offering professional solutions for UHMWPE fibers and protective materials, ensuring that people's needs for a better life and safety protection are met.
QXL UHMWPE covering yarn, which is a composite yarn using UHMWPE (Ultra High Molecular Weight Polyethylene) as the outer shell material to cover the outside of other yarns, combines many excellent properties of UHMWPE.
QianXiLong UHMWPE (Ultra High Molecular Weight Polyethylene) blended yarn, its unique polymer structure gives the blended yarn an extremely high strength and abrasion resistance, that far exceeds conventional yarns.
What Is UHMWPE Covering Yarn
UHMWPE covering yarn, which is a composite yarn using UHMWPE (Ultra High Molecular Weight Polyethylene) as the outer shell material to cover the outside of other yarns, combines many excellent properties of UHMWPE. UHMWPE has extremely high wear resistance, which means that the covering yarn is also wear-resistant and suitable for making products used in long-term friction environment. UHMWPE covering yarn has good impact absorption capacity because of the characteristic of UHMWPE fiber. UHMWPE covering yarn has good resistance to most chemicals, which makes the covered yarn suitable for chemical corrosion environment.
Advantages of UHMWPE Covering Yarn
Wear resistance
UHMWPE has extremely high wear resistance, which means that the covering yarn is also wear-resistant and suitable for making products used in long-term friction environment.
Chemical resistance
UHMWPE covering yarn has good resistance to most chemicals, which makes the covered yarn suitable for chemical corrosion environment.
Impact resistance
UHMWPE covering yarn has good impact absorption capacity because of the characteristic of UHMWPE fiber.
Low water absorption
UHMWPE has a very low water absorption, which allows the covered yarn to maintain its performance in humid environments.
High strength
UHMWPE has high strength, so the covering yarn also shows excellent tensile properties.
Lightweight
Compared with other high-performance fibers, the density of UHMWPE is lower, and the covered yarn made of UHMWPE is relatively lightweight.
Outdoor sports equipment
Because of the wear-resistant and impact-resistant characteristics, UHMWPE covering yarn is widely used in outdoor sports such as climbing ropes, tents, backpacks, etc.
Personal protective equipment
Such as anti-cutting gloves, safety belts, cut resistant vest, cut resistant socks, protective clothing, etc.
Sails and sea sports
Because of its moisture resistance and ultraviolet resistance, UHMWPE covering yarn is widely sed for sailing, canvas, kite line, etc.
Industrial webbing
Used for conveyor belts, lifting belts, etc.
Some Caveats to Consider of UHMWPE Covering Yarn
UHMWPE is also highly recyclable; two methods of recycling are available for UHMWPE covering yarns. The first is the standard recycling process for such thermoplastic yarns, which involves melting down the yarn into pellets which can be reheated and re-extruded. The second is for the UHMWPE covering yarn to undergo the recycling process like that used by Tay for its innovative stretch broken spun yarns, producing a unique type of yarn which is soft to the touch like a natural fibre which can have higher abrasion resistance than the continuous filament yarn.
While UHMWPE covering yarn has many upsides, there are some caveats to consider. The first is that UHMWPE is not well suited to high temperature applications; the melting point is around 150°C, with degradation in performance occurring beyond 70°C, so it is not recommended for use at such temperatures. The other is that gram-for-gram, UHMWPE can be more expensive, although this has to be weighed up against its higher strength at a given weight relative to many other types yarns, meaning less is required to achieve a similar tensile strength to another yarn.
Para-aramid fibres are the most commonly used materials in plain weave construction for soft armour applications due to their high strengths and modul. UHMWPE also has a comparatively lower volumetric density (0.97 g/cm3 compared to 1.44 g/cm3 of aramids) , higher longitudinal moduli, and resistance to chemical and physical degradation. The higher longitudinal moduli and lower density of UHMWPE result in faster elastic wave propagation, making energy dissipation more efficient than in aramids. Therefore, UHMWPE has the potential to be used in a variety of impact resistance applications, including but not limited to soft armour, hard armour and engine containment systems. Several factors govern the impact response of a fabric-based target. These factors include construction of the fabric (plain woven, twill woven, satin woven, etc.), shape and impact velocity of the projectile, boundary conditions of the target, ply orientation, inter-yarn and inter-ply friction. Mainly, inter-yarn and inter-ply friction have been found to play a crucial role in energy absorption upon projectile impact on a fabric-based target. When a projectile impacts a fabric target, a quotient of the energy is also dissipated by friction during projectile impact. Firstly, energy is dissipated due to friction between the projectile and the target. A portion of the energy is also dissipated due to friction between the plies of the target. Moreover, inter-yarn friction in a ply causes frictional dissipation due to limited mobility in a tight weave. Furthermore, increased inter-yarn friction delays perforation and increases the impact load capacity, thus allowing the fabric to absorb/dissipate more energy.
However, UHMWPE is known to have inferior frictional properties and poor adhesion properties due to its relatively low surface energy, making UHMWPE less common in impact resistance applications than aramids. It reported that the tensile strength of UHMWPE covering yarns was reduced by 20% upon being subjected to transverse compressive strains. UHMWPEs are rather commonly used in hard armour plate (HAP) inserts. UHMWPE fabrics subjected to impact using a steel sphere projectile was purely due to windowing or wedge-through effect. No yarn failure was observed in their tests. Poor projectile-yarn and inter-yarn frictional properties resulted in the yarns slipping over the projectile without absorbing energy via yarn stretching or yarn failure. Upon projectile impact, a tensile wave propagates along the fabric's primary yarns (yarns directly in contact with the projectile). A tensile strain is formed behind this wavefront. Yarn material moves longitudinally towards the point of impact. Consequently, yarns start to firstly de-crimp and then stretch. During this process, the impact energy of the projectile is converted to elastic strain energy in the yarns, which dominates the energy absorption process in the latter stages of impact energy absorption. The above mechanism explains how the fabric target absorbs energy by tension membrane action. It has been shown that most of the projectile energy is transferred to yarn strain energy and kinetic energy of primary yarns rather than secondary yarns. The higher the number of yarns involved in the process, the higher the tension membrane action leading to higher energy absorption. However, due to poor friction in UHMWPE, such membrane action cannot be observed, and fabrics fail primarily by wedge-through effect.
Optimization the Stab Resistance and Flexibility of UHMWPE Covering Yarn
Currently, the matrix textiles used in stab-resistant materials are mainly divided into woven fabric, nonwoven, and knitted fabric. The interweaving points between the yarn in woven plain structure fabrics and the nonwoven material are relatively unconstrained. This causes the yarn to slip easily, making the fabric lose its main stab-resistant effectiveness. However, the knitted structure is composed of yarns interlooping and interlocking with each other, whether warp knitted or weft knitted, somewhat similar to ancient scale armor. As a result, there are a large number of entanglement points between the yarns, which gives knitted structures an unparalleled advantage over woven and nonwoven fabrics. So, when a blade pierces a knitted fabric, the loop at the point of penetration quickly gathers the surrounding yarns to provide protection due to the abundant entanglements and connections. Specifically, the loop arc is first extended to both ends by the squeeze of the piercing blade, followed by the transfer of the loop sinking arc. Then, as the blade deepens, the yarn is continually pulled, causing the surrounding loop to pile up and squeeze around the blade.
At this juncture, the friction resistance of the loop structure reaches a peak on the blade. Besides, the deformation ability of the loops can be regulated to elevate the stab-resistant effect of the knitted fabric through various means, such as altering the interloped manner of yarns by changing the fabric structure. Immediately after the loop deformation, the residual energy of the tool puncture will be absorbed by the method of yarn shearing, friction heat generation, etc., to achieve the stab-resistant effect of the knitted fabric. It can be realized the knitted loop structure greatly exerts the characteristics of high-performance fiber and absorbs large impact kinetic energy through the mechanism of loop deformation. In addition, the knitted loop structure is widely used for its excellent properties such as air permeability and softness. Therefore, the research on the optimization of the stab resistance and flexibility of UHMWPE covering yarn matrix with the knitted structure is particularly important, although it is basic.
The knitted fabric, the woven fabric, and the nonwoven were simulated and compared first, all of which were matrix textile structures commonly used in stab-resistant materials. Then, the advantages of knitting structure on stab-resistant properties were explored to further determine the influencing factors on stab-resistant and soft properties of knitted fabrics. Through the method of single-factor design, the quasi-static stab and bending stiffness experiment of knitted fabrics were carried out under different influence factors. The four factors are yarn specifications factor, yarn content factor, fabric stitch density factor, and structure factor. In the end, the response surface method (RSM) was applied to the above factors to obtain the optimal process. It is noted the response surface method is to fit the functional relationship between factors and response values with the multiple quadratic regression equation obtained from the experimental scheme. Whereafter, the optimal process combination can be accurately and reliably predicted by analyzing the regression equation. The research mentioned above has rarely been covered in previous reports. In particular, the optimization process of UHMWPE covering yarn knitted fabric was calculated based on the response surface method. It makes the comprehensive performance of the stab resistance and flexibility of stab-resistant materials most excellent, which is more suitable for the subsequent process, and also directly applicable to the protection products.
Dynamic Strengthening of UHMWPE Covering Yarn by Incorporating Coatings
High-performance fiber yarns are widely used in the field of ballistic protection as fabric and reinforced composites due to their exceptional properties. When a yarn is impacted transversely by a projectile, a transverse wave is generated at the impact point and travels to the end. A faster transverse wave is desirable to dissipate energy more quickly, thereby enhancing the impact performance of the fabric or composite. However, experimental studies on yarns have shown that individual fibers within a yarn do not experience impact simultaneously. Instead, these fibers progressively fail within the first few microseconds. Additionally, during the manufacturing process, fibers are prone to slipping, leading to loosing yarns and fiber entanglement, which hinders smooth production, particularly in the weaving of high-density impact-resistant fabrics. Furthermore, experiments have revealed that when woven fabrics are post-treated with resin to create coated fabrics, some fibers may exhibit uneven resin infiltration. Under these circumstances, the yarn behaves as a collection of separate fiber components, which affects transverse wave propagation and potentially diminishes the overall impact resistance of the structure. Research has indicated that thermoplastic polyurethane (PU) is a preferable filler polymer due to its excellent processability and chemical stability. Notably, its molecular chain contains flexible segments that enhance resistance to bending, impact, and energy absorption. To improve the weavability of UHMWPE covering yarn and the overall impact resistance of its composites, the fibers are coated to enhance the wettability of the core yarns in subsequent fabric resin post-treatment.
The tensile properties of fiber yarns play a crucial role in determining the ballistic performance of fabrics and composites, and are therefore vital for the design of bulletproof equipment. Most research efforts have focused on investigating the tensile properties of single yarns, with limited studies on composite yarns with coating layers. It discovered that the strain rate of UHMWPE yarn' tensile properties exhibited high sensitivity to low strain rate (3.3 × 10−5 to 0.33/s). However, these tensile properties were independent of 0.33–400/s. It reported that the tensile strength of E-glass yarns gradually increased (90–1700 s−1), while the strain to failure increased with strain rate, and decreased with strain rate (exceeded 1300 s−1). Observed that the breaking stress of PVA yarns increased with increasing strain rate (0.01–1500 s−1). However, the failure strain of PVA fiber yarns significantly decreased with increasing strain rate (0.01–270 s−1), found that basalt yarns exhibited a significant strain rate effect, with increasing strain rate resulting in higher tensile strength and lower strain to failure. Conducted research found that the destructive stress and failure strain of the material gradually increased (0.01–180 s−1). However, no strain rate effect was observed (480–1000 s−1). It investigated T700 carbon fiber yarns and concluded that these yarns can be considered as strain-rate insensitive materials within the range of 0.001–1300 s−1. In the case of composite yarns with coating layers, discovered that coated carbon nanotube yarns exhibited higher ultimate tensile strengths compared to pure carbon nanotube yarns when subjected to in situ loading. Additionally, the coated yarns demonstrated more cohesive fracture behavior in comparison to uncoated yarns. It focused on the coating of UHMWPE covering yarn with PU and found that stretching the composite yarn under quasi-static conditions significantly increased its strength. However, neither of these studies involved dynamic loading conditions. Therefore, no yarn failure was observed in their experiments. It reported that spraying coatings on UHMWPE fabrics significantly increased the coefficient of friction of coated samples compared to neat counterparts, and improved the impact resistance of the fabrics.
Our factory
Zhejiang QianXiLong Special Co., Ltd and Longkui New Material Co., Ltd are highly regarded companies located in Yongkang Economic Development Zone, Zhejiang, China. These companies were created by the renowned Qianxi Group, a prominent investment group. QianXiLong Special Fiber (QXL) is an exceptional high-tech enterprise that focuses on research, development, and manufacturing of UHMWPE (Ultra High Molecular Weight Polyethylene) fibers. Our company boasts three plants situated in Yongkang, Longyou, and Shanxi, with a combined capacity of 4000 tons. Our fibers come in a wide range of superfine 8D to 2400D, and even up to 40000D, with high tenacity fibers (tenacity exceeding 42 cN/dtex) being our specialty. On the other hand, Longkui New Material Co., Ltd (Longkui) is a top-tier high-tech enterprise that concentrates on the development of UHMWPE protective materials. We specialize in UD composite material and its series of derivative products, including bulletproof vests and armor products. Our companies are committed to continuous improvement and establishing ourselves as trustworthy brands and enterprises. We adhere to the principle of providing customers with better, lighter, and safer products and are dedicated to offering professional solutions for UHMWPE fibers and protective materials, ensuring that people's needs for a better life and safety protection are met.
Certifications
video
FAQ
Hot Tags: uhmwpe covering yarn, China uhmwpe covering yarn manufacturers, suppliers, factory, uhmwpe blended yarn, ptfe uhmwpe fiber, uhmwpe fiber price, china colored uhmwpe fiber, fine uhmwpe fiber, color uhmwpe fiber
