Ultra-high molecular weight polyethylene fiber with surface hairiness structure as well as manufacturing method and application of ultra-high molecular weight polyethylene fiber

Abstract

The invention relates to an ultra-high molecular weight polyethylene fiber with a surface hairiness structure as well as a manufacturing method and application of the ultra-high molecular weight polyethylene fiber. The ultra-high molecular weight polyethylene fiber of the present invention has a core and hairiness covering at least a portion of the surface of the core, wherein the hairiness has an average length of 1-100 [mu] m and an average density of 1-50 pieces / 100 [mu] m. The surface of the obtained fiber has a surface hairiness structure, so that the surface roughness and the specific surface area are increased, and the fiber is more easily compounded with an adhesive.

Description

Technical Field

[0001] The invention relates to the field of high-performance fibers, and in particular to an ultra-high molecular weight polyethylene fiber with a surface hairiness structure, a manufacturing method thereof and applications thereof. Background Art

[0002] The structure of ultra-high molecular weight polyethylene is the simplest CC direct connection. After high-multiple drafting, it is fully crystallized, has no polar groups on the surface, and is smooth, so there is a problem of difficulty in compounding. At the same time, due to its high crystallinity, regular structure, and high longitudinal modulus, it is difficult to increase the curl in the process of making staple fibers, which makes it difficult for the staple fibers to cohere in the process of spinning into yarns, hindering the development of staple yarns of ultra-high molecular weight polyethylene fibers. At present, the global production capacity of ultra-high molecular weight polyethylene fibers is more than 70,000 tons / year, but the output of its staple yarn is less than 400t / year. The main reason is that ultra-high molecular weight polyethylene fibers are not easy to cohere. Summary of the invention

[0003] The purpose of the present invention is to manufacture an ultra-high molecular weight polyethylene fiber with a surface hairiness structure in view of the shortcomings of the prior art, so as to solve the problem that the ultra-high molecular weight polyethylene fiber is not easy to composite and the short-line yarn is difficult to process. The spinneret stretching ratio is low, so that the diffusion speed of the solvent is much lower than the surface evaporation speed, so that an asymmetrically contracted cortex is formed on the surface of the primary fiber. The primary fiber is added with friction porcelain during the drafting process, which produces a friction hairiness effect and forms a hairiness structure.

[0004] Specifically, the present invention relates to the following aspects.

[0005] 1. An ultra-high molecular weight polyethylene fiber having a core and hairiness (substantially end hairiness) covering at least a portion (preferably substantially all) of the surface of the core, wherein the average length of the hairiness is 1-100 μm (preferably 5-50 μm) and the average density is 1-50 pieces / 100 μm (preferably 1-10 pieces / 100 μm).

[0006] 2. The ultra-high molecular weight polyethylene fiber described in any of the above or the following aspects, wherein the viscosity-average molecular weight of the core polyethylene is at least 1.5 million (preferably 2 million-3 million), and the viscosity-average molecular weight of the hairiness polyethylene is 300,000-1.5 million (preferably 400,000-800,000).

[0007] 3. The ultra-high molecular weight polyethylene fiber described in any of the preceding or following aspects, wherein the viscosity average molecular weight of the hairy polyethylene is 0.1-0.8 times (preferably 0.2-0.5 times) the viscosity average molecular weight of the core polyethylene.

[0008] 4. The ultra-high molecular weight polyethylene fiber according to any one of the preceding or following aspects, wherein the average diameter of the core is at most 40 μm (preferably 10-25 μm).

[0009] 5. The ultra-high molecular weight polyethylene fiber described in any of the preceding or following aspects, wherein the average diameter of the hairiness is 0.1-5 μm (preferably 1-3 μm), and the average aspect ratio of the hairiness is 1-50 (preferably 5-15).

[0010] 6. The ultra-high molecular weight polyethylene fiber described in any one of the preceding or following aspects, wherein the hairiness has no bonding interface with the core.

[0011] 7. The ultra-high molecular weight polyethylene fiber described in any of the above or the following aspects has a single fiber fineness of 0.7-5 dtex (preferably 1.7-2.7 dtex).

[0012] 8. The ultra-high molecular weight polyethylene fiber described in any of the above or the following aspects has a surface friction coefficient of 0.1-0.6 (preferably 0.2-0.4).

[0013] 9. A method for producing ultra-high molecular weight polyethylene fiber, comprising the following steps:

[0014] 1) Mixing ultra-high molecular weight polyethylene and solvent to prepare spinning solution,

[0015] 2) extruding the spinning solution through a spinneret to form a spinning fine stream,

[0016] 3) while stretching the spinning stream, removing at least a portion (e.g., at least 50 wt%, preferably at least 70 wt%, at least 80 wt%, at least 90 wt%, at least 95 wt% or at least 97 wt%) of the solvent from the spinning stream to obtain spun fibers,

[0017] 4) drawing (referred to as post-drawing) the spun fiber in one or more stages (such as 1-8 or 2-5 stages), and rubbing the surface of the spun fiber while drawing in at least one of the stages to form hairiness.

[0018] 10. The production method described in any of the preceding or following aspects, wherein in step 1), the amount of the solvent used is at most 2000 parts by weight (preferably 1000-1500 parts by weight) relative to 100 parts by weight of the ultra-high molecular weight polyethylene.

[0019] 11. The production method described in any of the preceding or following aspects, wherein in step 1), the solvent is selected from at least one of naphthalene and its hydrogenated derivatives decalin, tetralin, kerosene, xylene, toluene, petroleum fractions, halogenated hydrocarbons, cycloalkanes, and cycloolefins, preferably decalin.

[0020] 12. The manufacturing method described in any of the above or the following aspects, wherein in step 1), the viscosity-average molecular weight of the ultra-high molecular weight polyethylene is 1 million to 9 million (preferably 3 million to 5 million).

[0021] 13. The production method described in any one of the preceding or following aspects, wherein the intrinsic viscosity of the ultra-high molecular weight polyethylene is 10-45 g / dl (preferably 15-35 g / dl).

[0022] 14. The manufacturing method according to any one of the preceding or following aspects, wherein in step 2), the extrusion temperature is 160-220°C (preferably 160-180°C), and the extrusion speed is 2-20 m / min (3-10 m / min).

[0023] 15. The manufacturing method described in any of the preceding or following aspects, wherein the spinning stream is immediately subjected to step 3) after leaving the spinneret.

[0024] 16. The manufacturing method described in any of the above or the following aspects, wherein in step 3), the operating conditions include: temperature of 70-180°C (preferably 120-160°C), blowing height of not less than 0.2m (preferably 2-13m), and air volume of 50-180m3 / h (preferably 60-100m3 / h).

[0025] 17. The manufacturing method described in any of the above or the following aspects, wherein in step 3), the stretching ratio is 1-8 (preferably 3-5).

[0026] 18. The manufacturing method described in any of the above or the following aspects, wherein in step 3), the stretching and the solvent removal are carried out simultaneously, and the duration is not less than 2 minutes (preferably 3-10 minutes).

[0027] 19. The manufacturing method according to any one of the preceding or following aspects, wherein in step 4), the friction is achieved by bringing the as-spun fibers into contact with one or more friction members (such as ceramic members).

[0028] 20. The manufacturing method according to any one of the preceding or following aspects, wherein in step 4), the contact angle between the as-spun fiber and the friction member is 100-600 cN (preferably 200-400 cN).

[0029] 21. The manufacturing method according to any one of the preceding or following aspects, wherein the friction coefficient of the friction member is not less than 0.1 (preferably 0.2-0.4).

[0030] 22. The manufacturing method described in any of the preceding or following aspects, wherein in step 4), the operating conditions include: the stretching temperature is 90-160°C (preferably 130-150°C), and the (overall) stretching ratio is 6-30 (preferably 10-20).

[0031] 23. A fabric comprising or made of the ultra-high molecular weight polyethylene fiber described in any one of the preceding or following aspects.

[0032] 24. The fabric described in any one of the preceding or following aspects further comprises at least one other fiber selected from natural plant fibers, natural animal fibers, artificial regenerated fibers, synthetic fibers and inorganic fibers.

[0033] Technical Effects

[0034] In the process of spinning and forming fibers, the present invention uses a low spinneret stretching ratio to make the diffusion speed of the solvent much lower than the surface evaporation speed, so that an asymmetrically contracted cortex is formed on the surface of the primary fiber. Then, the primary fiber is subjected to friction porcelain during the drafting process to produce a frictional hairiness effect, thereby forming an ultra-high molecular weight polyethylene fiber with a surface hairiness structure. The surface hairiness structure of the fiber obtained by the present invention increases the surface roughness and specific surface area, making the fiber easier to compound with the adhesive. When spinning yarn, the short fibers are easier to cohere to form short fiber yarns, which are used in various outerwear, underwear, woven fabrics, knitted fabrics and other fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a microscopic morphology of ultra-high molecular weight polyethylene fiber with surface hairiness structure.

[0036] Figure 2 is a schematic diagram of the contact wrap angle. Figure 2 In the figure, 1-wire; 2-friction ceramic part; θ-contact wrap angle. DETAILED DESCRIPTION

[0037] The specific embodiments of the present invention are described in detail below, but it should be pointed out that the protection scope of the present invention is not limited by these specific embodiments, but is determined by the claims in the appendix.

[0038] All publications, patent applications, patents and other references mentioned in this specification are incorporated herein by reference. Unless otherwise defined, all technical and scientific terms used in this specification have the meanings conventionally understood by those skilled in the art. In the event of a conflict, the definitions in this specification shall prevail.

[0039] When this specification uses the prefix "well-known to those skilled in the art", "prior art" or similar terms to introduce materials, substances, methods, steps, devices or components, etc., the objects introduced by the prefix cover those commonly used in the art when this application is filed, but also include those that are not commonly used at present but will become recognized in the art as being suitable for similar purposes.

[0040] In the context of the present invention, all numerical values ​​for parameters (eg amounts or conditions) are to be understood as being modified in all instances by the term "about", regardless of whether "about" actually appears before the numerical value.

[0041] In the context of the present invention, the method for measuring the monofilament fineness is GB / T14336-2008.

[0042] In the context of the present invention, the surface friction coefficient is measured using a friction coefficient meter of model XCF-1A.

[0043] In the context of the present invention, the contact wrap angle is Figure 2 The contact angle refers to the angle between the wire and the tangent line of the ceramic part when the wire passes through the ceramic part, such as Figure 2 As shown in the figure, the larger the contact angle, the larger the contact area between the wire and the porcelain part.

[0044] Unless otherwise specified, all percentages, parts, ratios, etc. mentioned in this specification are based on weight.

[0045] In the context of the present invention, any two or more embodiments or aspects of the present invention may be arbitrarily combined, and the technical solutions thus formed belong to part of the original disclosure of this specification and also fall within the protection scope of the present invention.

[0046] According to one embodiment of the present invention, it relates to an ultra-high molecular weight polyethylene fiber, comprising a core and hairiness covering at least a portion (preferably substantially all) of the surface of the core. According to the present invention, the hairiness is substantially end hairiness, that is, one end of the hairiness is attached to the core and the other end is a free end (e.g. Figure 1 According to the present invention, the hairiness has no interface with the core; in other words, the hairiness is generated in situ during the manufacturing process of the ultra-high molecular weight polyethylene fiber and is not additionally added by coating or the like.

[0047] According to one embodiment of the present invention, the average length of the hairiness is 1-100 microns (preferably 5-50 microns). If the hairiness is too long, the mechanical properties of the fiber will deteriorate, and if the hairiness is too short, it will not increase the cohesion.

[0048] According to one embodiment of the present invention, the average density of the hairiness is 1-50 pieces / 100 μm (preferably 1-10 pieces / 100 μm). If the hairiness density is too high, the mechanical properties of the fiber will deteriorate, and if the hairiness density is too low, it will not increase the cohesion.

[0049] According to one embodiment of the present invention, the viscosity average molecular weight of the core polyethylene is at least 1.5 million (preferably 2 million to 3 million), and the viscosity average molecular weight of the hairiness polyethylene is 300,000 to 1.5 million (preferably 400,000 to 800,000).

[0050] According to one embodiment of the present invention, the viscosity average molecular weight of the hairiness polyethylene is 0.1-0.8 times (preferably 0.2-0.5 times) the viscosity average molecular weight of the core polyethylene.

[0051] According to one embodiment of the present invention, the average diameter of the core is at most 40 μm (preferably 10-25 μm).

[0052] According to one embodiment of the present invention, the average diameter of the hairiness is 0.1-5 μm (preferably 1-3 μm), and the average aspect ratio of the hairiness is 1-50 (preferably 5-15).

[0053] According to the present invention, the hairiness has no interface with the core. In other words, the hairiness is generated in situ during the manufacturing process of the ultra-high molecular weight polyethylene fiber, and is not added to the ultra-high molecular weight polyethylene fiber by coating or the like.

[0054] According to one embodiment of the present invention, the single filament fineness of the ultra-high molecular weight polyethylene fiber is 0.7-5 dtex (preferably 1.7-2.7 dtex).

[0055] According to one embodiment of the present invention, the surface friction coefficient of the ultra-high molecular weight polyethylene fiber is 0.1-0.6 (preferably 0.2-0.4).

[0056] According to one embodiment of the present invention, a method for producing ultra-high molecular weight polyethylene fiber is also provided, comprising the following steps:

[0057] 1) Mixing ultra-high molecular weight polyethylene and solvent to prepare spinning solution,

[0058] 2) extruding the spinning solution through a spinneret to form a spinning fine stream,

[0059] 3) while stretching the spinning stream, removing at least a portion (e.g., at least 50 wt%, preferably at least 70 wt%, at least 80 wt%, at least 90 wt%, at least 95 wt% or at least 97 wt%) of the solvent from the spinning stream to obtain spun fibers,

[0060] 4) drawing (referred to as post-drawing) the spun fiber in one or more stages (such as 1-8 or 2-5 stages), and rubbing the surface of the spun fiber while drawing in at least one of the stages to form hairiness.

[0061] According to one embodiment of the present invention, in step 1), the amount of the solvent used is at most 2000 parts by weight (preferably 1000-1500 parts by weight) relative to 100 parts by weight of the ultra-high molecular weight polyethylene.

[0062] According to one embodiment of the present invention, in step 1), the solvent is selected from at least one of naphthalene and its hydrogenated derivatives decalin, tetralin, kerosene, xylene, toluene, petroleum fractions, halogenated hydrocarbons, cycloalkanes, and cycloolefins, preferably decalin.

[0063] According to one embodiment of the present invention, in step 1), the viscosity-average molecular weight of the ultra-high molecular weight polyethylene is 1 million to 9 million (preferably 3 million to 5 million).

[0064] According to one embodiment of the present invention, the intrinsic viscosity of the ultra-high molecular weight polyethylene is 10-45 g / dl (preferably 15-35 g / dl).

[0065] According to one embodiment of the present invention, in step 2), the extrusion temperature is 160-220° C. (preferably 160-180° C.), and the extrusion speed is 2-20 m / min (3-10 m / min).

[0066] According to one embodiment of the present invention, the spinning stream is immediately subjected to step 3) after leaving the spinneret.

[0067] According to one embodiment of the present invention, in step 3), the operating conditions include: temperature of 70-180°C (preferably 120-160°C), blowing height of not less than 0.2m (preferably 2-13m), air volume of 50-180m3 / h (preferably 60-100m3 / h).

[0068] According to one embodiment of the present invention, in step 3), the stretching ratio is 1-8 (preferably 3-5).

[0069] According to one embodiment of the present invention, in step 3), the stretching and the solvent removal are carried out simultaneously, and the duration is not less than 2 minutes (preferably 3-10 minutes).

[0070] According to one embodiment of the present invention, in step 4), the friction is achieved by bringing the as-spun fibers into contact with one or more friction members (such as ceramic members).

[0071] According to one embodiment of the present invention, in step 4), the contact angle between the as-spun fibers and the friction member is 0°-180° (preferably 10°-90°).

[0072] According to one embodiment of the present invention, the friction coefficient of the friction member is not less than 0.1 (preferably 0.2-0.4).

[0073] According to one embodiment of the present invention, in step 4), the operating conditions include: the stretching temperature is 90-160° C. (preferably 130-150° C.), and the (overall) stretching ratio is 6-30 (preferably 10-20).

[0074] According to one embodiment of the present invention, a fabric is also provided, comprising the ultra-high molecular weight polyethylene fiber described in any one of the preceding or following aspects of the present specification or made of the ultra-high molecular weight polyethylene fiber described in any one of the preceding or following aspects of the present specification.

[0075] According to one embodiment of the present invention, the fabric further comprises at least one other fiber selected from natural plant fibers, natural animal fibers, artificial regenerated fibers, synthetic fibers and inorganic fibers.

[0076] Example

[0077] The present invention is further described in detail below using examples and comparative examples, but the present invention is not limited to these examples.

[0078] Example 1

[0079] The ultra-high molecular weight polyethylene fiber with surface hairiness structure in this embodiment is obtained by the following process:

[0080] Ultra-high molecular weight polyethylene with a viscosity average molecular weight of 2.8 million, polyethylene with a viscosity average molecular weight of 600,000, and decalin are mixed and swollen in a ratio of 100:5:1300 to form a swollen suspension. The suspension is sheared and dissolved by a screw, and extruded at 178°C and an extrusion speed of 8m / min to form a spinning fine stream. After the spinning fine stream leaves the spinneret, it is immediately directly desolventized to remove at least 98% of the solvent residue. The desolventization temperature is 145°C, the blowing height is 10m, and the air volume is 80m 3 / h, and 4 times stretching is performed during the solvent removal process for 8 minutes to obtain the spun fibers. The spun fibers are in contact with two friction components (such as ceramic components) to achieve the friction. The contact angle between the spun fibers and the friction components is 30°. The friction coefficient of the friction component is not less than 0.3. The stretching temperature during friction is 145°C, and the total stretching ratio is 15.

[0081] The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a portion of the surface of the core.

[0082] Example 2

[0083] The same as Example 1, except that the solvent removal time is 1 minute. The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a portion of the surface of the core.

[0084] Example 3

[0085] The same as Example 1, except that the contact wrap angle with the friction member is 5. The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a part of the surface of the core.

[0086] Example 4

[0087] The same as Example 1, except that the contact wrap angle with the friction member is 120. The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a part of the surface of the core.

[0088] Example 5

[0089] The same as Example 1, except that the friction coefficient of the friction member is 0.1. The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a part of the surface of the core.

[0090] Example 6

[0091] The same as Example 1, except that the friction coefficient of the friction member is 0.5. The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a part of the surface of the core.

[0092] Example 7

[0093] The same as Example 1, except that the molecular weight of the core polyethylene is 2 million and the molecular weight of the hairiness polyethylene is 1 million. The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a portion of the surface of the core.

[0094] Example 8

[0095] The same as Example 1, except that the molecular weight of the core polyethylene is 4.5 million and the molecular weight of the hairiness polyethylene is 450,000. The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a portion of the surface of the core.

[0096] Example 9

[0097] The same as Example 1, except that the molecular weight of the core polyethylene is 3.5 million and the molecular weight of the hairiness polyethylene is 2 million. The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a portion of the surface of the core.

[0098] Example 10

[0099] The same as Example 1, except that the solvent removal temperature is 120°C, the blowing height is 13m, and the air volume is 100m3 / h. The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a part of the surface of the core.

[0100] Embodiment 11

[0101] The same as Example 1, except that the solvent removal temperature is 180°C, the blowing height is 0.2m, and the air volume is 180m3 / h. The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a part of the surface of the core.

[0102] Example 12

[0103] The same method as in Example 1 except that the extrusion temperature was 200° C. The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a portion of the surface of the core.

[0104] Comparative Example 1

[0105] The same as Example 1, except that the solvent removal and stretching are not performed simultaneously, but the solvent removal step is performed first and then the stretching step. The ultra-high molecular weight polyethylene fiber of this example has many broken ends and cannot be fluffed.

[0106] Comparative Example 2

[0107] The same as Example 1, except that the solvent removal and stretching are not performed simultaneously, but the stretching step is performed first and then the solvent removal step.

[0108] Comparative Example 3

[0109] The same as Example 1 except that there is no friction member. The ultra-high molecular weight polyethylene fiber of this example has a core and has no end hairiness covering at least a part of the surface of the core.

[0110] Comparative Example 4

[0111] The same as Example 1, except that there is no stretching process when passing through the friction member. The ultra-high molecular weight polyethylene fiber of this example has a core and end hairiness covering at least a part of the surface of the core.

[0112] Comparative Example 5

[0113] The same as Example 1, except that the gel spinning method is used. After the spinning solution exits the spinneret, the solvent is not removed immediately, but it is first cooled, the cooling temperature is 30°C, and the cooling time is ≤1min. The ultra-high molecular weight polyethylene fiber of this example has a core and no end hairiness covering at least a portion of the surface of the core.

[0114]

[0115]

Claims

1. An ultra-high molecular weight polyethylene fiber having a core and hairiness (substantially end hairiness) covering at least a portion (preferably substantially all) of the surface of the core, wherein the average length of the hairiness is 1-100 μm (preferably 5-50 μm) and the average density is 1-50 pieces / 100 μm (preferably 1-10 pieces / 100 μm).

2. The ultra-high molecular weight polyethylene fiber of claim 1, wherein the viscosity-average molecular weight of the core polyethylene is at least 1.5 million (preferably 2 million to 3 million), and the viscosity-average molecular weight of the hairiness polyethylene is 300,000 to 1.5 million (preferably 400,000 to 800,000).

3. The ultra-high molecular weight polyethylene fiber of claim 1, wherein the viscosity-average molecular weight of the hairy polyethylene is 0.1-0.8 times (preferably 0.2-0.5 times) the viscosity-average molecular weight of the core polyethylene.

4. The ultra-high molecular weight polyethylene fiber of claim 1, wherein the average diameter of the core is at most 40 μm (preferably 10-25 μm), and / or the average diameter of the hairiness is 0.1-5 μm (preferably 1-3 μm), the average aspect ratio of the hairiness is 1-50 (preferably 5-15) and / or the hairiness has no bonding interface with the core.

5. The ultra-high molecular weight polyethylene fiber according to claim 1, wherein the single filament fineness is 0.7-5 dtex (preferably 1.7-2.7 dtex) and / or the surface friction coefficient is 0.1-0.6 (preferably 0.2-0.4).

6. A method for producing ultra-high molecular weight polyethylene fiber, comprising the following steps: 1) Mixing ultra-high molecular weight polyethylene and solvent to prepare spinning solution, 2) extruding the spinning solution through a spinneret to form a spinning fine stream, 3) while stretching the spinning stream, removing at least a portion (e.g., at least 50 wt%, preferably at least 70 wt%, at least 80 wt%, at least 90 wt%, at least 95 wt% or at least 97 wt%) of the solvent from the spinning stream to obtain spun fibers, 4) drawing (referred to as post-drawing) the spun fiber in one or more stages (such as 1-8 or 2-5 stages), and rubbing the surface of the spun fiber while drawing in at least one of the stages to form hairiness.

7. The manufacturing method according to claim 6, wherein in step 2), the extrusion temperature is 160-220°C (preferably 160-180°C), and the extrusion speed is 2-20 m / min (3-10 m / min).

8. The manufacturing method according to claim 6, wherein the spinning stream is immediately subjected to step 3) after leaving the spinneret.

9. The manufacturing method according to claim 6, wherein in step 3), the operating conditions include: The temperature is 70-180°C (preferably 120-160°C), the blowing height is not less than 0.2m (preferably 2-13m), and the air volume is 50-180m3 / h (preferably 60-100m3 / h).

10. The manufacturing method according to claim 6, wherein in step 3), the stretching ratio is 1-8 (preferably 3-5).

11. The manufacturing method according to claim 6, wherein in step 3), the stretching and the solvent removal are carried out simultaneously, and the duration is not less than 2 minutes (preferably 3-10 minutes).

12. The manufacturing method according to claim 6, wherein in step 4), the friction is achieved by bringing the as-spun fibers into contact with one or more friction members (such as ceramic members).

13. The manufacturing method according to claim 12, wherein in step 4), the contact angle between the as-spun fiber and the friction member is 0°-180° (preferably 10°-90°), and / or the friction coefficient of the friction member is not less than 0.1 (preferably 0.2-0.4).

14. The manufacturing method of claim 6, wherein in step 4), the operating conditions include: The stretching temperature is 90-160° C. (preferably 130-150° C.), and the (overall) stretching ratio is 6-30 (preferably 10-20).

15. A fabric comprising or made of the ultra-high molecular weight polyethylene fiber according to claim 1.

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