An easily infiltrated and enhanced modified ultra-high molecular weight polyethylene fiber and its preparation method

Abstract

The present invention provides an easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber, and the wetting magnification ratio (K) of the easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber is: #imgabs0# Wherein: K is the wetting magnification ratio; m PE is the mass percentage of the ultra-high molecular weight polyethylene component in the fiber; θ1 is the contact angle of the unmodified easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber; C is a constant with a value of 1.32; m G is the mass percentage of the easily wettable and enhanced modified material; θ2 is the contact angle of the easily wettable and enhanced modified material; wherein the wetting magnification ratio K is 1.1-1.5. The present invention also discloses a preparation method of the easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber and corresponding textiles.

Description

Technical Field

[0001] The present invention belongs to the field of special fiber materials, and particularly relates to an easily wettable reinforced modified ultra-high molecular weight polyethylene fiber and a preparation method thereof. Background Art

[0002] Ultra-high molecular weight polyethylene fiber is the fiber with the highest specific strength among the currently industrialized fiber materials, and has excellent properties such as high strength, high modulus, wear resistance, and chemical corrosion resistance. It is widely used in the fields of national defense and military, marine engineering cables, personal protection, etc. With the continuous deepening of the integration of military and civilian, the application of ultra-high molecular weight polyethylene fiber in the civilian market has gradually increased, and the civilian market mainly dominated by cut-resistant gloves has gradually occupied the leading position. At present, the cut-resistant gloves made of commonly used 400D ultra-high molecular weight polyethylene fiber have a maximum cut resistance level of level 3 according to the EN388-2003 standard, and are very unstable, becoming increasingly unsuitable for the requirements of protecting against cut hazards in the actual working environment.

[0003] As described in the prior art such as Chinese Patent CN111235665, boron nitride micron-sized short fibers with a weight percentage of 0.25-20 wt% are added to the ultra-high molecular weight polyethylene matrix, and the fiber processed into gloves or cut-resistant clothing obtained through mixing, spinning, and extrusion has a cut resistance level of 4-5 levels. In the related research on the preparation of ultra-high molecular weight polyethylene fiber by the blending method, the specific characteristics or parameters of the performance improvement of the modified ultra-high molecular weight polyethylene fiber products during use are not involved, nor can these parameters be used to improve the performance of polyethylene fiber products.

[0004] The content in the background art part is only the technology known to the inventor and does not necessarily represent the prior art in this field. Summary of the Invention

[0005] In view of the above problems, the present invention provides an easily wettable reinforced modified ultra-high molecular weight polyethylene fiber, and the wetting magnification (K) of the easily wettable reinforced modified ultra-high molecular weight polyethylene fiber satisfies the following relationship:

[0006] Wherein: K is the wetting magnification;

[0007]

[0008] m PE is the mass percentage of the ultra-high molecular weight polyethylene component in the fiber;

[0009] θ1 is the contact angle of the unmodified easily wettable reinforced modified ultra-high molecular weight polyethylene fiber;

[0010] C is a constant, with a value of 1.32;

[0011] m G is the mass percentage of the easily wettable reinforced modified material;

[0012] θ2 is the contact angle of the easily wettable enhanced modified material.

[0013] Among them, the wetting magnification K is 1.1 - 1.5. When K < 1.1, the wetting effect is poor during sizing; when K > 1.5, during sizing, the adhesive will penetrate through the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber and seep into the inside of the covering yarn.

[0014] Further, it is one or more of nano-silica, nano-titanium dioxide, short cut filaments of T800 carbon fiber, short cut filaments of 150D basalt, tetrapod-like zinc oxide whiskers, calcium sulfate whiskers, potassium titanate whiskers, silicon carbide whiskers;

[0015] And / or, the weight percentage of the easily wettable enhanced modified material to ultra-high molecular weight polyethylene is 0.18 - 0.7:1, preferably 0.25 - 0.67:1.

[0016] And / or, the wetting magnification K is 1.25 - 1.43.

[0017] Further, the viscosity-average molecular weight of the ultra-high molecular weight polyethylene is 4 million - 10 million, preferably 4 million - 8 million; the diameter is 100μm - 250μm, preferably 120μm - 180μm.

[0018] Another aspect of the present invention discloses a preparation method of an easily wettable enhanced modified ultra-high molecular weight polyethylene fiber, comprising the following steps:

[0019] (1) Stir the easily wettable material, ultra-high molecular weight polyethylene resin, white oil, emulsifier, and dispersant to prepare a mixed material;

[0020] (2) Spin the mixed material into an oil-containing nascent fiber;

[0021] (3) The oil-containing nascent fiber is subjected to static standing, extraction, drying, and multi-stage drawing to obtain an easily wettable enhanced modified ultra-high molecular weight polyethylene fiber;

[0022] Among them, the wetting magnification (K) of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber satisfies the following relationship:

[0023]

[0024] Among them: K is the wetting magnification;

[0025] m PE is the mass percentage of the ultra-high molecular weight polyethylene component in the fiber;

[0026] θ1 is the contact angle of the unmodified easily wettable enhanced modified ultra-high molecular weight polyethylene fiber;

[0027] C is a constant with a value of 1.32;

[0028] m G is the mass percentage of the easy-infiltration enhanced modification material;

[0029] θ2 is the contact angle of the easy-infiltration enhanced modification material;

[0030] wherein the infiltration magnification K is 1.1 - 1.5.

[0031] Further, in the step (1), the easy-infiltration enhanced modification material is one or more of nano-silica, nano-titanium dioxide, short cut filaments of T800 carbon fiber, short cut filaments of 150D basalt, tetrapod-like zinc oxide whiskers, calcium sulfate whiskers, potassium titanate whiskers, and silicon carbide whiskers; wherein, the easy-infiltration enhanced modification material is cylindrical or needle-shaped, with a length of 8 μm to 100 μm, preferably 20 μm to 90 μm; and a diameter of 0.3 μm to 30 μm, preferably 0.5 - 11 μm;

[0032] And / or, in the step (1), the weight percentage of the easy-infiltration enhanced modification material to ultra-high molecular weight polyethylene is 0.18 - 0.7:1, preferably 0.25 - 0.67:1.

[0033] And / or, in the step (1), the infiltration magnification K is 1.25 - 1.43;

[0034] And / or, in the step (1), the stirring is shear stirring..

[0035] Further, in the step (1), the viscosity-average molecular weight of ultra-high molecular weight polyethylene is 4 million - 10 million, preferably 4 million - 8 million; the diameter is 100 μm to 250 μm, preferably 120 μm to 180 μm;

[0036] Further, in the step (1), the emulsifier is one of polyvinyl acetate, glyceryl tristearate, polycarboxylate emulsifier, polyoxyethylene sorbitan, and anhydride fatty acid ester, and the weight ratio to the easy-infiltration material is 1:19 - 50, preferably 1:32 - 49;

[0037] And / or, in the step (1), the dispersant is a silane coupling agent, and the weight ratio to the infiltration material is 1:10 - 20;

[0038] And / or, in the step (2), the spinning is carried out by a twin-screw extruder;

[0039] And / or, in the step (2), the oil-containing as-spun yarn specification is 6 - 30 g / m, preferably 8 - 20 g / m;

[0040] And / or, in the step (3), the draft ratio is 35 - 60 times, preferably 40 - 55 times.

[0041] In another aspect of the present invention, a textile is disclosed. The easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber and spandex are made into a spandex covered yarn (the easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber covers the spandex), and further woven into a textile. The weaving density is greater than 12 coils / cm, and the anti-cutting grade is greater than grade 5.

[0042] In another aspect of the present invention, a textile composite is disclosed. The surface of the textile is cured using an adhesive, and the type of the adhesive is one of waterborne polyurethane, nitrile rubber, latex, polyethylene resin, and polyvinyl chloride resin.

[0043] Further, one or several of tetrapod zinc oxide whiskers, calcium sulfate whiskers, potassium titanate whiskers, and silicon carbide whiskers with a weight percentage content of 0.5% - 5% are dispersed in the adhesive;

[0044] Among them, the preferred weight percentage content is 0.65 - 0.77%.

[0045] The present invention establishes a relationship model between the product after blending and spinning the easily wettable and enhanced modified material and ultra-high molecular weight polyethylene resin and different adhesive systems. It has guiding significance in the matching of the new easily wettable and enhanced modified material and adhesive system, and helps the technicians in this field for reference in material selection.

[0046] The present invention proposes the concept of wetting ratio. By estimating in advance the selection and compatibility performance of the easily wettable and enhanced modified material, the technicians in this field can predict in advance the interfacial characteristics of the material. Especially when the easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber and its modified fiber are used in anti-cutting gloves, the measurement of the wettability with each adhesive type is beneficial for rapid screening and obtaining reliable conclusions. For example: Before screening the wetting enhancement material and wetting adhesive type, the wetting ratio calculation formula proposed by the present invention can be used for measurement. When the wetting ratio is greater than 1.1, it can be considered that there is a wetting improvement effect, and small-scale or medium-scale experiments can be carried out for verification.

[0047] The easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber involved in the present invention, the textile processed by a circular knitting machine can obtain a very high anti-cutting grade after knitting processing, and the anti-cutting grade is higher than grade 4. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The drawings are used to provide further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention.

[0049] In the drawings:

[0050] Figure 1 It is a 1000 - fold microscope photo of the easily wettable enhanced modified ultra - high - molecular - weight polyethylene fiber in Example 1;

[0051] Figure 2 It is a contact angle test diagram of the ultra - high - molecular - weight polyethylene fiber without adding the easily wettable enhanced modification material in Example 1;

[0052] Figure 3 It is a contact angle test diagram of the easily wettable enhanced modified ultra - high - molecular - weight polyethylene fiber in Example 1. Detailed implementation manners

[0053] In the following description, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature and not restrictive.

[0054] Unless otherwise defined herein, scientific and technical terms used in conjunction with the present invention will have the meanings commonly understood by those of ordinary skill in the art. In addition, unless the context otherwise requires, singular terms shall include plural forms, and plural terms shall include singular forms. More specifically, as used in this specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" include plural referents. In this application, unless otherwise stated, the use of "or" means "and / or". In addition, the use of the term "comprising" and other forms (such as "including" and "containing") is not restrictive. In addition, the ranges provided in the specification and the appended claims include the endpoints and all values between the endpoints. The following describes the preferred embodiments of the present invention. It should be understood that the preferred embodiments described herein are only for illustrating and explaining the present invention and are not used to limit the present invention.

[0055] In the present invention:

[0056] Wetting refers to the resin matrix diffusing on the fiber surface and being able to form a uniform resin coating, and the thickness of the resin coating is 0.5 - 3 mm

[0057] The wetting magnification is the wetting effect of the modified ultra - high - molecular - weight polyethylene fiber relative to the conventional unmodified ultra - high - molecular - weight polyethylene fiber. The larger the value, the better the wetting effect

[0058] The contact angle refers to the angle formed at the three - phase junction of solid, liquid, and gas, from the solid - liquid interface through the liquid interior to the gas - liquid interface. The contact angle in this patent is the angle from the interior of the resin matrix to the air and the resin matrix formed at the interface of the fabric made of fibers, the resin matrix, and air. The smaller the contact angle, the better the wetting effect.

[0059] An easily wettable enhanced modified ultra-high molecular weight polyethylene fiber and its preparation method according to the present invention are as follows:

[0060] Step 1: Shear, stir, and reflux an easily wettable material, ultra-high molecular weight polyethylene resin, white oil, emulsifier, dispersant, and antioxidant to prepare a mixed material;

[0061] The easily wettable material is one or more of nano-silica, nano-titanium dioxide, short cut filaments of T800 carbon fiber, short cut filaments of 150D basalt, tetrapod zinc oxide whiskers, calcium sulfate whiskers, potassium titanate whiskers, and silicon carbide whiskers; the easily wettable enhanced modified material is cylindrical or needle-shaped, with a length of 8 μm to 100 μm, such as 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, preferably 20 μm to 90 μm; the diameter is 0.3 μm to 30 μm, such as 0.3 μm, 1 μm, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, preferably 0.5 - 11 μm; the weight percentage of the wettable material to the ultra-high molecular weight polyethylene resin is 0.18 - 0.7:1, such as 0.18:1, 0.2:1, 0.3:1, 0.4:1, 0.5:1, 0.6:1, 0.7:1; preferably 0.25 - 0.67:1.

[0062] The ultra-high molecular weight polyethylene resin has a viscosity-average molecular weight of 4 million to 10 million, such as 4 million, 5 million, 6 million, 7 million, 8 million, 9 million, 10 million, preferably 4 million - 8 million; the diameter is 100 μm to 250 μm, such as 100 μm, 120 μm, 140 μm, 160 μm, 180 μm, 200 μm, 220 μm, 250 μm, preferably 120 μm - 180 μm.

[0063] The emulsifier is one of polyvinyl acetate, glyceryl tristearate, polycarboxylate emulsifier, and polyoxyethylene sorbitan fatty acid ester, and the weight ratio to the easily wettable material is 1:19 - 50, such as 1:19, 1:20, 1:25, 1:30, 1:35, 1:40, 1:45, 1:50, preferably 1:32 - 49; the dispersant is a silane coupling agent, and the weight ratio to the wettable material is 1:10 - 20, such as 1:10, 1:11, 1:12, 1:13, 1:14, 1:15, 1:16, 1:17, 1:18, 1:19, 1:20.

[0064] The antioxidant is B225, model B225, provided by BASF Germany, and the dosage is 0.2 - 0.7% of the weight percentage of the ultra-high molecular weight polyethylene, preferably 0.35 - 0.65%.

[0065] Step 2: The mixed material 1 enters a twin-screw extruder and is spun into an oil-containing nascent fiber of a certain specification.

[0066] Step 3: The oil-containing nascent fiber undergoes standing, extraction, and drying, and then enters the multi-stage drawing stage. The drawing ratio is 35 - 60 times, such as 35 times, 36 times, 37 times, 38 times, 39 times, 40 times, 41 times, 42 times, 43 times, 44 times, 45 times, 46 times, 47 times, 48 times, 49 times, 50 times, 51 times, 52 times, 53 times, 54 times, 55 times, 56 times, 57 times, 58 times, 59 times, 60 times, to produce an easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber.

[0067] Step 4: The easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber and spandex are made into a spandex-covered yarn; the spandex-covered yarn is woven into a textile, and the weaving density is greater than 12 coils / cm.

[0068] Step 5: The woven textile in Step 4 is compounded with an adhesive body. The adhesive is cured on the surface of the textile 3. The type of the adhesive is one of waterborne polyurethane, nitrile rubber, latex, polyethylene resin, and polyvinyl chloride resin; wherein one or several of tetrapod zinc oxide whiskers, calcium sulfate whiskers, potassium titanate whiskers, and silicon carbide whiskers with a weight percentage of 0.5% - 5% are dispersed in the adhesive system.

[0069] The present invention also relates to establishing a wetting relationship formula between different adhesive curing systems and textiles woven from modified fibers made of materials and ultra-high molecular weight polyethylene resin:

[0070]

[0071] Wherein: K is the wetting ratio;

[0072] m PE is the mass percentage of the ultra-high molecular weight polyethylene component in the modified fiber;

[0073] θ1 is the contact angle of the unmodified easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber;

[0074] C is a constant, with a value of 1.32 - 1.46, which is an empirical constant obtained by performing multi-batch and multi-quantity contact angle tests on the modified fiber according to different mass percentage contents of the modified material in the easily wettable and enhanced modified material modified fiber;

[0075] m G is the mass percentage of the easily wettable and enhanced modified material;

[0076] θ2 is the contact angle of the easily wettable material;

[0077] The wetting ratio K is 1.1 - 1.5.

[0078] K is the numerical value of the infiltration magnification calculated under different adhesive curing systems. The larger the K value, the better the interfacial effect of the adhesive system on the textile surface. The establishment of this formula has guiding significance for screening infiltration materials with improved infiltration effects and matching with adhesive curing systems.

[0079] Examples

[0080] The present invention generally described herein will be more readily understood by reference to the following examples, which are provided by way of illustration and are not intended to limit the present invention. Additionally, the experimental methods in the following examples are conventional methods unless otherwise specified. The raw materials, reagent materials, etc. used in the following examples are commercially available products unless otherwise specified.

[0081] The following raw materials in the examples are sourced from:

[0082] The short cut filaments of T800 carbon fiber are provided by Changzhou Yaobang Friction Materials Factory; the white oil is 68# spinning special white oil provided by Korea Kukdong Oil & Chemical Co., Ltd.; the emulsifier model is AMM provided by Jiangsu Haian Petrochemical Factory; the dispersant is model AC-6A provided by Honeywell International Inc., USA; the antioxidant B225, model B225, is provided by BASF, Germany.

[0083] Example 1

[0084] This example shows an easily infiltrated and enhanced modified ultra-high molecular weight polyethylene fiber, its preparation method, and corresponding products.

[0085] 56 kg of short cut filaments of T800 carbon fiber are added with 100 kg of white oil, 1 kg of emulsifier, and 1.5 kg of dispersant and stirred. After stirring and dispersing at room temperature for 30 min, it is pumped into a swelling kettle to make a mixed liquid A1;

[0086] Then, 200 kg of ultra-high molecular weight polyethylene powder and 2 kg of antioxidant B225 (model B225, BASF, Germany) are put into a premixing kettle, and 700 kg of white oil is pumped in and stirred. After stirring at room temperature for 30 min, it is pumped into a swelling kettle to make a mixed liquid B1;

[0087] The mixed liquid A1 and the mixed liquid B1 are stirred and mixed again, and then 1200 kg of white oil at 85 °C is added, and the temperature is raised to 115 °C and maintained at this temperature for 90 min to make a mixed liquid C1;

[0088] Pump the mixture C1 into the feeding kettle above the twin-screw extruder. The feeding kettle is connected to the feed inlet of the twin-screw extruder. At the same time, there is a bypass inlet for circulation on the side of the feeding kettle to maintain the liquid level in the feeding kettle and ensure the liquid circulation in the feeding kettle to prevent material sedimentation. The screw diameter of the twin-screw extruder is 123 mm, and the rotation speed is 200 r / min. Control the temperature of 16 zones of the screw to gradually rise from 98 °C to 289 °C, and maintain the melt temperature at about 287 - 292 °C. The mixture C passes through the twin-screw extruder, then through a filter, a filter screen, and a spinneret into the cooling water tank. Control the temperature of the cooling water tank at 5 - 10 °C to obtain the gel fiber D1. Collect the gel fiber D1 in a yarn bucket and let it stand for 36 h;

[0089] Feed the static gel fiber D1 into the cleaning process. Clean out the white oil with tetrachloroethylene (Luxi Petrochemical), and remove the tetrachloroethylene from the fiber by drying to obtain the pre-drawn fiber E1;

[0090] The pre-drawn fiber E is a pure fiber without any additives or solvents. Feed it into the drawing hot box for drawing. There are a total of three drawing hot boxes with temperatures of 135 °C, 142 °C, and 148 °C respectively. The drawing ratio is 55 times. Finally, wind it on a bobbin to obtain the easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber F1;

[0091] The easily wettable and enhanced modified ultra-high molecular weight polyethylene fiber F1, 100D polyester, and 40D spandex are combined into a covered yarn G1, and then knitted to make gloves H1, thus obtaining a product with an easily wettable and enhanced effect.

[0092] In this embodiment, m PE = 200 / (200 + 56) × 100% = 78.13%;

[0093] θ1 is detected to be 142°;

[0094] C = 1.32;

[0095] m G = 56 / (200 + 56) × 100% = 21.88%;

[0096] θ2 is detected to be 56°;

[0097] According to the formula,

[0098]

[0099] K = 142 * 100 / (142 × 78.13 + 56 × 21.88 × 1.32) = 1.12

[0100] Example 2

[0101] This embodiment shows an easily wettable enhanced modified ultra-high molecular weight polyethylene fiber, its preparation method and corresponding products.

[0102] 65 kg of 150D basalt short cut fibers are added with 100 kg of white oil, 0.8 kg of emulsifier and 1.8 kg of dispersant and stirred. After stirring and dispersing at room temperature for 30 minutes, it is pumped into a swelling kettle to make a mixed liquid A2.

[0103] Then, 200 kg of ultra-high molecular weight polyethylene powder and 1.5 kg of antioxidant B225 are put into a premixing kettle, 700 kg of white oil is pumped in and stirred. After stirring at room temperature for 30 minutes, it is pumped into the swelling kettle to make a mixed liquid B2.

[0104] The mixed liquid A2 and the mixed liquid B2 are stirred and mixed again, then 1200 kg of white oil at 85 °C is added, the temperature is raised to 115 °C, and the temperature is maintained for 90 minutes to make a mixed liquid C2.

[0105] The mixed liquid C2 is pumped into a feeding kettle above a twin-screw extruder. The feeding kettle is connected to the feeding port of the twin-screw extruder. At the same time, there is a bypass inlet for circulation on the side of the feeding kettle to maintain the liquid level in the feeding kettle and also ensure the circulation of the liquid in the feeding kettle to prevent material settlement. The screw diameter of the twin-screw extruder is 123 mm, the rotation speed is 200 r / min, the temperature of 16 zones of the screw is controlled to gradually rise from 98 °C to 280 °C, and the melt temperature is maintained at about 2278 °C. The mixed liquid C passes through the twin-screw extruder, then through a filter, a filter screen and a spinneret and enters a cooling water tank. The temperature of the cooling water tank is controlled at 7 - 8 °C to obtain a gel fiber D2, and the gel fiber is collected in a yarn bucket and balanced for 36 h.

[0106] The static gel fiber D2 enters the cleaning process. The white oil is washed out with tetrachloroethylene, and the tetrachloroethylene is removed from the fiber by drying to obtain a pre-drawn fiber E2.

[0107] The pre-drawn fiber E is a pure fiber without any additives or solvents. It enters a drawing hot box for drawing. There are a total of three drawing hot boxes, with temperatures of 132 °C, 140 °C and 145 °C respectively, and the drawing ratio is 45 times. Finally, it is wound on a yarn bobbin to obtain an easily wettable enhanced modified ultra-high molecular weight polyethylene fiber F2.

[0108] The easily wettable enhanced modified ultra-high molecular weight polyethylene fiber F2 and 40D spandex are knitted to make gloves H2, then a product with an easily wettable enhanced effect is obtained.

[0109] In this embodiment, m PE = 200 / (200 + 65) × 100% = 75.47%;

[0110] θ1 is detected to be 142°;

[0111] C = 1.32;

[0112] m G = 65 / (200 + 65) × 100% = 24.53%;

[0113] θ2 is detected as 52°;

[0114] According to the formula,

[0115]

[0116] K = 142 * 100 / (142 × 75.47 + 52 × 24.53 × 1.32) = 1.15

[0117] Cutting grade evaluation standard: EN388:2016 Protective gloves against mechanical risks.

[0118]

[0119] Figure 1 It is a 1000 - fold microscope photo of the easily wettable enhanced modified ultra - high molecular weight polyethylene fiber. It can be seen that the additives are spherical or needle - shaped, with a length of 8 - 10 μm and a diameter of 0.3 - 30 μm; Figure 2 The contact angle of the ultra - high molecular weight polyethylene fiber without the addition of the easily wettable enhanced modified material is greater than 90°. The compatibility between the fiber and the adhesive is poor, and there is no obvious wetting effect; Figure 3 It is the contact angle test of the easily wettable enhanced modified ultra - high molecular weight polyethylene fiber. It can be seen from the figure that the contact angle is less than 90°, and the wetting effect between the fiber and the adhesive is improved.

[0120] Finally, it should be noted that the above - mentioned are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. In addition, although the elements of the present invention can be described or claimed in an individual form, it is also contemplated that there may be multiple elements, unless explicitly limited to a single element.

Claims

1. An easily infiltrated and enhanced modified ultra-high molecular weight polyethylene fiber, characterized in that, It includes ultra-high molecular weight polyethylene and an easily wettable reinforcing and modifying material, and the wetting magnification (K) of the easily wettable reinforced ultra-high molecular weight polyethylene fiber satisfies the following relationship: Where: K is the wetting magnification; m PE is the mass percentage of ultra-high molecular weight polyethylene in the ultra-high molecular weight polyethylene fiber with enhanced infiltration modification; θ1 is the contact angle of the unmodified ultra-high molecular weight polyethylene fiber; C is a constant, with a value of 1.32 to 1.46; m G is the mass percentage of the modification material in the super high molecular weight polyethylene fiber modified by enhanced infiltration; θ2 is the contact angle of the easily wettable reinforced ultra-high molecular weight polyethylene fiber; Wherein the wetting magnification K is 1.1 - 1.5; The easily wettable reinforcing and modifying material is one or several of nano-silica, nano-titanium dioxide, short cut filaments of T800 carbon fiber, short cut filaments of 150D basalt, tetrapod-shaped zinc oxide whiskers, calcium sulfate whiskers, potassium titanate whiskers, silicon carbide whiskers; And / or, the weight ratio of the easily wettable reinforcing and modifying material to ultra-high molecular weight polyethylene is (0.18 - 0.7):1; The viscosity-average molecular weight of the ultra-high molecular weight polyethylene is 4 million - 10 million; the diameter of the ultra-high molecular weight polyethylene is 100μm - 250μm.

2. The infiltration-enhanced modified ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that, The weight ratio of the easily wettable reinforcing and modifying material to ultra-high molecular weight polyethylene is (0.25 - 0.67):

1.

3. The infiltration-enhanced modified ultra-high molecular weight polyethylene fiber according to claim 1, wherein, The easily wettable reinforcing and modifying material is cylindrical or needle-shaped.

4. The infiltration-enhanced modified ultra-high molecular weight polyethylene fiber according to claim 3, characterized in that, The length of the easily wettable reinforcing and modifying material is 8μm - 100μm.

5. The infiltration-enhanced modified ultra-high molecular weight polyethylene fiber according to claim 4, characterized in that, The length of the easily wettable reinforcing and modifying material is 20μm - 90μm.

6. The infiltration-enhanced modified ultra-high molecular weight polyethylene fiber according to claim 3, characterized in that, The diameter of the easily wettable reinforcing and modifying material is 0.3μm - 30μm.

7. The infiltration-enhanced modified ultra-high molecular weight polyethylene fiber according to claim 6, wherein The diameter of the easily wettable reinforcing and modifying material is 0.5 - 11μm.

8. The infiltration-enhanced modified ultra-high molecular weight polyethylene fiber according to claim 1, wherein The wetting magnification K is 1.25 - 1.

43.

9. The infiltration-enhanced modified ultra-high molecular weight polyethylene fiber according to claim 1, wherein, The viscosity-average molecular weight of the ultra-high molecular weight polyethylene is 4 million - 8 million.

10. The infiltration-enhanced modified ultra-high molecular weight polyethylene fiber according to claim 1, wherein The diameter of the ultra-high molecular weight polyethylene is 120μm - 180μm.

11. The infiltration-enhanced modified ultra-high molecular weight polyethylene fiber according to any one of claims 1-10, characterized in that, It is prepared by the following method, which specifically includes the following steps: (1) Stir the easily wettable reinforcing and modifying material, ultra-high molecular weight polyethylene resin, white oil, emulsifier, dispersant, and antioxidant to prepare a mixed material; (2) Spin the mixed material into an oil-containing nascent filament; (3) The oil-containing nascent filament is subjected to static standing, extraction, drying, and multi-fold drawing to obtain the easily wettable reinforced ultra-high molecular weight polyethylene fiber; Wherein, the wetting magnification (K) of the easily wettable reinforced ultra-high molecular weight polyethylene fiber satisfies the following relationship: Where: K is the wetting magnification; m PE is the mass percentage of ultra-high molecular weight polyethylene in the modified fiber of the infiltration-enhanced modified material; θ1 is the contact angle of the unmodified easily wettable reinforced ultra-high molecular weight polyethylene fiber; C is a constant, with a value of 1.32 to 1.46; m G is the mass percentage of the modifying material in the modifying fiber for the infiltrating-enhanced modified material; θ2 is the contact angle of the easily wettable reinforcing and modifying material; The wetting magnification K is 1.1 - 1.

5.

12. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 11, wherein, In the step (1), the easily wettable reinforcing and modifying material is one or several of nano-silica, nano-titanium dioxide, short cut filaments of T800 carbon fiber, short cut filaments of 150D basalt, tetrapod-shaped zinc oxide whiskers, calcium sulfate whiskers, potassium titanate whiskers, silicon carbide whiskers.

13. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 12, wherein, In the step (1), the easily wettable reinforcing and modifying material is cylindrical or needle-shaped.

14. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 13, characterized in that, The length of the easily wettable reinforcing and modifying material is 8μm - 100μm.

15. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 14, characterized in that, The length of the easily wettable reinforcing and modifying material is 20μm - 90μm.

16. The preparation method of the wettability-enhanced modified ultra-high molecular weight polyethylene fiber according to claim 13, characterized in that, The diameter of the easily wettable reinforcing and modifying material is 0.3μm - 30μm.

17. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 16, characterized in that, The diameter of the wettability-enhanced modification material of the wettability-enhanced modification material is 0.5-11 μm.

18. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 11, characterized in that, In the step (1), the weight ratio of the wettability-enhanced modification material to the ultra-high molecular weight polyethylene is (0.18~0.7):

1.

19. The preparation method of the wettability-enhanced modified ultra-high molecular weight polyethylene fiber according to claim 18, characterized in that, In the step (1), the weight ratio of the wettability-enhanced modification material to the ultra-high molecular weight polyethylene is (0.25~0.67):

1.

20. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 11, characterized in that, In the step (1), the infiltration magnification K is 1.25~1.

43.

21. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 11, characterized in that, In the step (1), the stirring is shear stirring.

22. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 11, characterized in that, In the step (1), the viscosity-average molecular weight of the ultra-high molecular weight polyethylene is 4 million - 10 million.

23. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 22, wherein, In the step (1), the viscosity-average molecular weight of the ultra-high molecular weight polyethylene is 4 million - 8 million.

24. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 11, wherein, In the step (1), the diameter of the ultra-high molecular weight polyethylene is 100 μm - 250 μm.

25. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 24, wherein, In the step (1), the diameter of the ultra-high molecular weight polyethylene is 120 μm - 180 μm.

26. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 11, characterized in that, In the step (1), the emulsifier is one of polyvinyl acetate, glyceryl tristearate, polycarboxylate emulsifier, and polyoxyethylene sorbitan fatty acid ester, and the weight ratio to the wettability-enhanced modification material is 1:(19~50).

27. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 26, wherein, In the step (1), the emulsifier is one of polyvinyl acetate, glyceryl tristearate, polycarboxylate emulsifier, and polyoxyethylene sorbitan fatty acid ester, and the weight ratio to the wettability-enhanced modification material is 1:(32~49).

28. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 27, characterized in that, In the step (1), the dispersant is a silane coupling agent, and the weight ratio to the wettability-enhanced modification material is 1:(10~20).

29. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 11, characterized in that, In the step (2), the spinning is carried out by a twin-screw extruder.

30. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 11, characterized in that, In the step (2), the specification of the oil-containing as-spun yarn is 6~30 g / m.

31. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 30, characterized in that, In the step (2), the specification of the oil-containing as-spun yarn is 8~20 g / m.

32. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 11, characterized in that, In the step (3), the draw ratio is 35 - 60 times.

33. The preparation method of the easily wettable enhanced modified ultra-high molecular weight polyethylene fiber according to claim 30, characterized in that, In the step (3), the draw ratio is 40 - 55 times.

34. A textile, characterized in that, The wettability-enhanced modification ultra-high molecular weight polyethylene fiber and spandex described in any one of claims 1-10 are made into a spandex-covered yarn, and further woven into a textile, the weaving density is greater than 12 coils / cm, and the anti-cutting grade is greater than 5.

35. A textile composite, characterized in that, The surface of the textile in claim 34 is cured using an adhesive, and the adhesive is one of waterborne polyurethane, nitrile rubber, latex, polyethylene resin, and polyvinyl chloride resin.

36. The textile composite according to claim 35, wherein, One or several of tetrapod zinc oxide whiskers, calcium sulfate whiskers, potassium titanate whiskers, and silicon carbide whiskers with a weight percentage content of 0.5% - 5% are dispersed in the adhesive.

37. The textile composite according to claim 36, characterized in that, One or several of tetrapod zinc oxide whiskers, calcium sulfate whiskers, potassium titanate whiskers, and silicon carbide whiskers with a weight percentage content of 0.65% - 0.77% are dispersed in the adhesive.

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