An anti-wear polyester cover yarn
By using gradient melt bonding of medium-temperature melting point filaments and low-temperature melting point filaments and applying an oil layer, the problem of insufficient abrasion resistance of polyester yarn was solved, the stability and durability of the yarn structure were improved, production costs were reduced, and the hand feel was improved.
Patent Information
- Application Number
- CN202522710491.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-22
AI Technical Summary
Existing polyester yarns have insufficient abrasion resistance, and traditional methods suffer from problems such as insufficient bonding strength, hardening of the hand feel, reduced breathability, and environmental pollution.
Medium-temperature melting point filaments are twisted together with core polyester filaments, and low-temperature melting point filaments are twisted together with abrasion-resistant fibers and wrapped around the outer layer. A strong structure is formed by gradient melt bonding, and an oil layer is applied to the outer layer to improve lubricity and antistatic properties.
It improves the stability and durability of the yarn structure, makes the abrasion-resistant layer less prone to peeling, reduces production costs, increases production efficiency, and improves the feel and quality of the fabric.
Smart Images
Figure CN224942779U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of covered yarn technology, and in particular relates to an abrasion-resistant polyester covered yarn. Background Technology
[0002] With the development of the textile industry, the requirements for yarn performance are increasing, especially in high-intensity applications such as outdoor equipment, workwear, and bag fabrics. The abrasion resistance of the yarn directly determines the service life of the final product. Polyester fiber is widely used due to its high strength and low cost, but its abrasion resistance needs to be improved.
[0003] In existing technologies, two methods are commonly used to improve the abrasion resistance of polyester yarn: one is to coat or blend high-strength abrasion-resistant fibers (such as nylon and aramid) on the outer layer of the yarn; the other is to reinforce the yarn through chemical coating or adhesive methods. However, these traditional methods have significant shortcomings: firstly, simple physical coating or blending results in insufficient bonding between the abrasion-resistant layer and the core layer, making it prone to delamination or peeling under long-term friction or bending; secondly, while chemical coatings or adhesives (such as spraying or impregnation) can enhance adhesion, they often lead to a stiffer yarn feel and reduced breathability, and the coating can easily cover the surface of the abrasion-resistant fibers, thus weakening their abrasion resistance advantage. At the same time, complex coating processes suffer from poor uniformity, environmental pollution, and high energy consumption.
[0004] Therefore, it is essential to invent a wear-resistant polyester-coated yarn. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides an anti-wear polyester covered yarn, comprising a first polyester filament, a second polyester filament, a medium-temperature melting point filament, an anti-wear fiber, a low-temperature melting point filament, and an oil layer. The first polyester filament, the second polyester filament, and the medium-temperature melting point filament are intertwined and twisted together, and the anti-wear fiber and the low-temperature melting point filament are wrapped around the outer twisted strands. The oil layer is formed on the outer surface of the anti-wear fiber and the low-temperature melting point filament.
[0006] Preferably, the medium-temperature melting point filament is located between the first and second polyester filaments, and the three are twisted together to form a core. The medium-temperature melting point filament is bonded together with the first polyester filament, the second polyester filament, and the external abrasion-resistant fibers.
[0007] Preferably, the abrasion-resistant fiber and the low-temperature melting point filament are twisted together and wound around the outside of the core wire, and the low-temperature melting point filament is bonded together with the first polyester filament, the second polyester filament, and the outer abrasion-resistant fiber.
[0008] Preferably, the medium-temperature melting point filament and the low-temperature melting point filament are bonded together, and the medium-temperature melting point filament and the low-temperature melting point filament are copolyester filaments.
[0009] Preferably, the abrasion-resistant fibers and low-temperature melting point filaments form an abrasion-resistant outer jacket, and the abrasion-resistant outer jacket is coated with an oil to form the upper oil layer.
[0010] Compared with the prior art, the present invention has the following beneficial effects:
[0011] This invention employs a method of twisting medium-temperature melting point filaments with core polyester filaments, and twisting low-temperature melting point filaments with abrasion-resistant fibers, which are then wrapped around the outer layer. Upon heating, this creates a gradient melt-bonding process from the inside out. The medium-temperature melting point material melts first, forming a strong skeletal bond within the core layer; the low-temperature melting point material then melts, tightly fixing the abrasion-resistant fibers and penetrating to the core layer interface, where it fuses with the medium-temperature melting point material. This gradient, integrated bonding method achieves an "anchoring" bond between the structural layers, fundamentally solving the problem of easy peeling of the abrasion-resistant layer and significantly improving the structural stability and durability of the yarn.
[0012] This invention utilizes low-temperature melting point filaments twisted and directly wrapped around the outermost layer to form a network structure primarily based on inter-fiber point adhesion, resulting in most of the abrasion-resistant fiber surface remaining directly exposed. This structure ensures that during yarn use, the abrasion-resistant fibers act as the first line of defense, directly contacting and resisting friction, thus fully leveraging their excellent abrasion resistance and significantly improving the abrasion life of the finished fabric.
[0013] This invention completely eliminates the need for traditional complex processes such as spraying and impregnation, and can be achieved using conventional filament doubling, twisting, and heat setting processes. All functional materials (medium-temperature and low-temperature melting point filaments) participate in the spinning process in the form of yarn. The production process is continuous, integrated, easy to control, and produces stable product quality with high material utilization and no environmental pollution, greatly reducing production costs and improving production efficiency.
[0014] The outermost oil layer (bundling agent or antistatic agent) of this invention provides the necessary lubrication and antistatic properties for the yarn. This effectively reduces frictional damage and breakage rate of the yarn during subsequent knitting, weaving, and other processing, improves weaving efficiency, and enhances the hand feel and quality of the final fabric. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0016] Figure 2 This is a schematic diagram of the core wire structure of this utility model.
[0017] In the picture:
[0018] 1. First strand of polyester filament 2. Second strand of polyester filament 3. Medium-temperature melting point filament 4. Abrasion-resistant fiber 5. Low-temperature melting point filament 6. Oil layer Detailed Implementation
[0019] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0020] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.
[0021] As attached Figure 1 To be continued Figure 2 As shown:
[0022] This utility model provides an anti-abrasion polyester covered yarn, comprising a first polyester filament 1, a second polyester filament 2, a medium-temperature melting point filament 3, an anti-abrasion fiber 4, a low-temperature melting point filament 5, and an oil layer 6. The first polyester filament 1, the second polyester filament 2, and the medium-temperature melting point filament 3 are intertwined and twisted together, and the anti-abrasion fiber 4 and the low-temperature melting point filament 5 are wrapped around the outside of the twisted strands. The oil layer 6 is formed on the outer surface of the anti-abrasion fiber 4 and the low-temperature melting point filament 5.
[0023] Furthermore, the core wire is composed of a first polyester filament 1, a second polyester filament 2, and a medium-temperature melting point filament 3. The medium-temperature melting point filament 3 is spatially positioned between the first polyester filament 1 and the second polyester filament 2. These three strands are tightly twisted together using twisting processes such as ring twisting or hollow spindle wrapping, forming a composite core wire with a three-dimensional helical structure. The medium-temperature melting point filament 3 is a copolyester material, and its melting point is typically designed to be between 160°C and 200°C. In the subsequent heat setting process, the medium-temperature melting point filament 3 melts upon heating. The melt not only wets and bonds the first polyester filament 1 and the second polyester filament 2, forming a robust core skeleton, but also partially penetrates outwards, contacting and bonding with the externally coated abrasion-resistant fibers 4, thereby establishing a strong chemical bond and mechanical anchoring connection between the core layer and the functional layer.
[0024] Furthermore, the abrasion-resistant outer layer is composed of abrasion-resistant fibers 4 and low-temperature melting point filaments 5. The abrasion-resistant fibers 4 (such as high-strength nylon filaments or aramid filaments) and the low-temperature melting point filaments 5 are first twisted together through a doubling or initial twisting process to form a composite covered yarn. Subsequently, this composite covered yarn is spirally wound onto the outside of the aforementioned core yarn using a covering machine or twisting machine. The low-temperature melting point filament 5 is also a copolyester material, and its melting point is typically designed to be between 110°C and 150°C, lower than the melting point of the medium-temperature melting point filament 3. During the heat setting process, the low-temperature melting point filament 5 melts before the medium-temperature melting point filament 3. Its melt achieves three-dimensional bonding: first, it bonds and fixes adjacent abrasion-resistant fibers 4 to form a stable network-like outer jacket; second, it penetrates inward to the surface of the core wire and adheres to the first polyester filament 1 and the second polyester filament 2; third, it meets and fuses with the melt of the medium-temperature melting point filament 3 that penetrates from the inside out, together forming a continuous and gradient thermoplastic bonding interface.
[0025] Furthermore, both the medium-temperature melting point filament 3 and the low-temperature melting point filament 5 are modified copolyester filaments, and their polymer matrices have the same chemical backbone structure, ensuring excellent compatibility. Under the specific temperature window of the heat setting process, the melt of the low-temperature melting point filament 5, which melts first, and the melt of the medium-temperature melting point filament 3, which melts subsequently, interpenetrate, interweave, and fuse at the interface between the core and the wear-resistant outer sheath. This adhesion formed by materials of the same origin but different melting points is not a simple interfacial adhesion, but rather the formation of a gradient interpenetrating polymer network. This structure ensures the continuity, toughness, and durability of the bonding interface from the core layer to the functional layers, avoiding interlayer delamination failure caused by material incompatibility or clear interfaces.
[0026] Furthermore, the abrasion-resistant outer jacket, formed by the fusion bonding of abrasion-resistant fibers 4 and low-temperature melting point filaments 5, undergoes a final oiling process. In this process, the yarn passes at a constant speed through a tank containing a special oil or contacts a precisely metered oiling roller, thereby uniformly coating its outer surface with an extremely thin layer of oil, forming the top oil layer 6. This oil is typically a compound textile oil, mainly containing a bubbling agent (such as polyether compounds) and an antistatic agent (such as quaternary ammonium salt compounds). The main functions of the top oil layer 6 are: to impart good lubricity to the yarn surface, reducing friction and wear and breakage rates during subsequent weaving; to provide appropriate bubbling force, preventing fiber fuzzing and ensuring yarn smoothness; and to eliminate static electricity generated during processing, ensuring smooth production and the comfort of the final fabric. This oil layer coexists physically with the underlying hot-melt bonded structure and does not affect its inherent properties.
[0027] The working principle is as follows: First, the first polyester filament 1, the second polyester filament 2 and the medium-temperature melting point filament 3 are physically wound together through a twisting process to form a core wire. At the same time, the abrasion-resistant fiber 4 and the low-temperature melting point filament 5 are twisted and spirally wrapped around its outside to construct the initial "core-sheath" structure.
[0028] Subsequently, during the heat setting process, the difference in melting points between the outer low-temperature melting point filament 5 and the inner medium-temperature melting point filament 3 is used to achieve phased gradient melting. The low-temperature melting point filament 5 melts first, initially fixing the wear-resistant fiber 4 and attaching it to the surface of the core. Then, the medium-temperature melting point filament 3 melts. While strengthening the interior of the core, its melt permeates and fuses with the melted low-temperature melt, forming a continuous and strong gradient interpenetrating polymer network at the interface between the core layer and the functional layer. This transforms the mechanical winding structure into an integrated chemical anchoring whole.
[0029] Finally, the oil layer 6 applied to the yarn surface, through lubrication and antistatic effects, ensures the smooth operation of this high-abrasion-resistant yarn in subsequent textile processing. The entire process achieves synergy from physical composite and chemical bonding to surface functionalization, giving the yarn high core strength and toughness, ultra-abrasion-resistant surface, and stable interlayer bonding.
[0030] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.
Claims
1. An abrasion-resistant polyester-coated yarn, characterized in that, It includes a first polyester filament (1), a second polyester filament (2), a medium-temperature melting point filament (3), an abrasion-resistant fiber (4), a low-temperature melting point filament (5), and an oil layer (6). The first polyester filament (1), the second polyester filament (2), and the medium-temperature melting point filament (3) are twisted together, and the abrasion-resistant fiber (4) and the low-temperature melting point filament (5) are wrapped around the outside of the twisted strands. The oil layer (6) is formed on the outer surface of the abrasion-resistant fiber (4) and the low-temperature melting point filament (5).
2. The abrasion-resistant polyester-coated yarn as described in claim 1, characterized in that: The medium-temperature melting point filament (3) is located between the first polyester filament (1) and the second polyester filament (2), and the three are twisted together to form a core. The medium-temperature melting point filament (3) is bonded together with the first polyester filament (1), the second polyester filament (2) and the external abrasion-resistant fiber (4).
3. The abrasion-resistant polyester covered yarn as described in claim 2, characterized in that: The abrasion-resistant fiber (4) and the low-temperature melting point filament (5) are twisted together and wound around the outside of the core wire. The low-temperature melting point filament (5) is bonded together with the first polyester filament (1), the second polyester filament (2), and the outer abrasion-resistant fiber (4).
4. The abrasion-resistant polyester covered yarn as described in claim 3, characterized in that: The medium-temperature melting point filament (3) and the low-temperature melting point filament (5) are bonded together. The medium-temperature melting point filament (3) and the low-temperature melting point filament (5) are copolyester filaments.
5. The abrasion-resistant polyester-coated yarn as described in claim 4, characterized in that: The abrasion-resistant fiber (4) and the low-temperature melting point filament (5) form an abrasion-resistant outer jacket, and the abrasion-resistant outer jacket is coated with an oil to form the upper oil layer (6).