Colored flash non-woven fabric as well as preparation method and application thereof

Abstract

The invention belongs to the field of fibers, and particularly discloses a colored flash non-woven fabric and a preparation method and application thereof. The dispersing effect of the pigment is improved by adding the dyeing assistant, meanwhile, the ethylene-vinyl acetate copolymer with better compatibility with the dyeing assistant is compounded, the compatibility of the dyeing assistant in a system is improved, the dispersity and wettability of the pigment and the dyeing assistant are improved through polyvinylpyrrolidone and fatty alcohol-polyoxyethylene ether, and the color fastness of the pigment is improved. The coloring effect of the flash non-woven fabric is improved on the basis that the good tensile property of the flash non-woven fabric is kept.

Description

Technical Field

[0001] The present application belongs to the field of fibers, and specifically relates to a colored flash-steamed nonwoven fabric and a preparation method and application thereof. Background Art

[0002] Polyethylene has the characteristics of high stability, abrasion resistance, cut resistance, chemical corrosion resistance, smooth surface, light weight, softness and waterproofness, and is widely used in clothing, fisheries, sports devices and other fields. However, polyethylene has a single color, and because of its large molecular chain, high crystallinity, non-polarity, hydrophobicity and other characteristics, it is difficult to color. Conventional fiber dyeing methods are not applicable to it or dye it poorly, resulting in the defects of uneven color and weak coloring of polyethylene fiber materials. In addition, because conventional pigments are still dispersed in particles in polyethylene fibers, there are problems with compatibility and poor dispersibility, resulting in a decrease in the tensile and other mechanical properties of the polyethylene fiber matrix, and it is impossible to take into account both good mechanical properties and coloring properties.

[0003] Flash spinning is a spinning method that extrude a polymer solution (such as a polyethylene solution) above the boiling point of the solvent and under high pressure into a normal pressure environment. Due to the sharp drop in pressure, the solvent in the spinning solution evaporates rapidly and is converted into extremely fine fiber filaments. After separation, collection, sorting, and reinforcement, flash non-woven fabric products are obtained. Compared with traditional non-woven fabric materials, flash non-woven fabrics not only have fine fiber filaments and good mechanical properties, but also have high molding efficiency and short production cycle. In order to meet the needs of fiber coloring, the coloring raw materials can be blended with the polymer raw materials and then spun to color the fibers and produce colored flash non-woven fabrics. This method can save the amount of dye and improve dyeing efficiency. Summary of the invention

[0004] In view of the poor mechanical properties and coloring properties of the above-mentioned prior art polyethylene fibers, the purpose of this application is to provide a colored flash non-woven fabric and its preparation method and application. This application improves the dispersion effect of the pigment by adding a dyeing aid, and at the same time compounding an ethylene-vinyl acetate copolymer with better compatibility with the dyeing aid to improve the compatibility of the dyeing aid in the system, and also improves the dispersibility and wettability of the pigment and the dyeing aid by polyvinyl pyrrolidone and fatty alcohol polyoxyethylene ether, so as to achieve the improvement of the coloring effect and color fastness of the flash non-woven fabric while maintaining the good tensile properties of the flash non-woven fabric.

[0005] To achieve the above purpose, the following technical solutions are specifically included:

[0006] A colored flash-evaporated nonwoven fabric comprises the following components in parts by weight: 100 parts of high-density polyethylene (HDPE), 10-30 parts of low-density polyethylene (LDPE), 3-8 parts of ethylene-vinyl acetate copolymer (EVA), 0.5-5 parts of dyeing aid, 1-4 parts of polyvinyl pyrrolidone (PVP), 0.5-6 parts of pigment, 0.05-1.5 parts of fatty alcohol polyoxyethylene ether, and 0.1-1 parts of antioxidant. The dyeing aid comprises at least one of sodium sulfate, boron nitride, and wollastonite.

[0007] In the colored flash nonwoven fabric of the present application, it is possible that the viscosity of the melt system can be increased to a certain extent by the dyeing aid, in the process of melt blending, the shear force is effectively transmitted, and the pigment that is easy to agglomerate is provided with the effect of abrasive in the system, which is conducive to the dispersion of the pigment and is conducive to preventing the agglomeration of the pigment. Meanwhile, the dyeing aid is an inorganic material, and a certain filling effect can be provided, improving the strength and aging resistance of the fiber. However, the dyeing aid is an inorganic material, and its compatibility with the matrix resin is poor, and it is necessary to have ethylene-vinyl acetate copolymer, and the dyeing aid is more inclined to be compatible with ethylene-vinyl acetate copolymer, and ethylene-vinyl acetate copolymer is also easily compatible with polyethylene, and polyvinyl pyrrolidone and fatty alcohol polyoxyethylene ether are also assisted as dispersants and surfactants, while maintaining good tensile properties, the dispersibility and wettability of the dyeing aid and pigment and the matrix resin are improved, the coloring effect and color fastness of the fiber are improved, and good mechanical properties and coloring properties are comprehensively realized.

[0008] Preferably, the dyeing aids are boron nitride and wollastonite, and the mass ratio of boron nitride to wollastonite is (0.5-1.5):(0.5-1.5).

[0009] More preferably, the mass ratio of boron nitride to wollastonite is in the range of one or any two of (0.3:1), (0.5:1), (1:1), (1.5:1), (2:1), (3:1).

[0010] Boron nitride has a certain lubricity, and wollastonite has a fibrous morphology. The combination of the two may make it easier for the pigment to adsorb on the surface of boron nitride and wollastonite, further improving the dispersion effect of the pigment and improving the uniformity and coloring effect of the fiber.

[0011] Preferably, the average particle size of the dyeing auxiliary is greater than or equal to 0.1 μm and less than or equal to 5 μm.

[0012] More preferably, the average particle size of the dyeing auxiliary is in the range of one or any two of 0.1 μm, 0.5 μm, 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, and 5 μm.

[0013] More preferably, the average particle size of wollastonite is greater than or equal to 1 μm and less than or equal to 5 μm.

[0014] More preferably, the average particle size of the boron nitride is greater than or equal to 0.1 μm and less than or equal to 1 μm.

[0015] More preferably, the average particle size of the sodium sulfate is greater than or equal to 0.8 μm and less than or equal to 1 μm.

[0016] The average particle size of the dyeing aid affects its dispersion effect in the system. Below the above average particle size, it can maintain a good shape. Not only will its own surface energy not increase and the probability of agglomeration increase due to its small particle size, but it can also better play its own abrasive effect and cooperate with the pigment. The pigment is more easily adsorbed on its surface, thereby improving the dispersion effect of the pigment, increasing the optical effects such as reflection and refraction on the fiber surface, and improving the coloring effect of the fiber.

[0017] Preferably, the K value of polyvinyl pyrrolidone is greater than or equal to 17 and less than or equal to 90.

[0018] More preferably, the K value of polyvinyl pyrrolidone is in the range of one or any two of 17, 20, 30, 40, 50, 60, 70, 80, and 90.

[0019] Different molecular weights of polyvinyl pyrrolidone will lead to different viscosities, which will affect the effect of its coordination with other components, especially the dispersion effect of dyeing auxiliaries and pigments. The molecular weight of polyvinyl pyrrolidone can be expressed by K value. The higher the K value, the higher the molecular weight. Under the above K value, the coordination effect of polyvinyl pyrrolidone with other components is better, which is more beneficial to improving the color fastness and reducing the color difference of colored flash non-woven fabrics.

[0020] Preferably, the HLB of the fatty alcohol polyoxyethylene ether is greater than or equal to 9 and less than or equal to 20.

[0021] More preferably, the HLB of the fatty alcohol polyoxyethylene ether is in the range of one or any two of 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20.

[0022] Preferably, the fatty alcohol polyoxyethylene ether includes at least one of polyoxyethylene stearyl ether and polyoxyethylene lauryl ether.

[0023] The HLB of fatty alcohol polyoxyethylene ether affects the wetting effect of the fiber, and then affects the coloring effect of the fiber. Within the above-mentioned HLB range, the fiber has a better coloring effect, and compared with other types of surfactants, non-ionic fatty alcohol polyoxyethylene ether has a better wetting effect on the pigment.

[0024] Preferably, the high-density polyethylene has a melt index of greater than or equal to 5 g / 10 min and less than or equal to 15 g / 10 min at 190° C. and a load of 2.16 kg according to ASTM D1238.

[0025] Further preferably, the melt index of the high density polyethylene at 190°C and 2.16 kg load according to ASTM D1238 is one of or any two of 5 g / 10 min, 6 g / 10 min, 7 g / 10 min, 8 g / 10 min, 9 g / 10 min, 10 g / 10 min, 11 g / 10 min, 12 g / 10 min, 13 g / 10 min, 14 g / 10 min, and 15 g / 10 min.

[0026] Preferably, the low-density polyethylene has a melt index of greater than or equal to 20 g / 10 min and less than or equal to 30 g / 10 min at 190° C. and a load of 2.16 kg according to ASTM D1238.

[0027] Further preferably, the melt index of the low density polyethylene at 190°C and 2.16 kg load according to ASTM D1238 is one of or any two of 20 g / 10 min, 21 g / 10 min, 22 g / 10 min, 23 g / 10 min, 24 g / 10 min, 25 g / 10 min, 26 g / 10 min, 27 g / 10 min, 28 g / 10 min, 29 g / 10 min, and 30 g / 10 min.

[0028] High-density polyethylene has better toughness, but its aging resistance is poor, while low-density polyethylene has poor tensile properties, but its aging resistance is better. At the same time, high-density polyethylene and low-density polyethylene, low-density polyethylene and pigments have good compatibility and will not reduce the compatibility of the system. To a certain extent, it increases the aging resistance of the fiber and provides a basis for maintaining good color fastness.

[0029] Preferably, the pigment includes at least one of an organic pigment and an inorganic pigment.

[0030] More preferably, the organic pigment includes at least one of an azo pigment, a phthalocyanine pigment, and a heterocyclic pigment.

[0031] Pigments are used as coloring materials to provide color for fibers. Their dispersion and penetration effects will significantly affect the coloring effect of fibers. Compared with inorganic pigments, organic pigments have better compatibility in polyethylene systems, which is more conducive to their uniform dispersion in fibers, and the color is fuller and brighter. Different types of pigments can be used alone or in combination.

[0032] Preferably, the average particle size of the pigment is greater than or equal to 0.05 μm and less than or equal to 10 μm.

[0033] More preferably, the average particle size of the pigment is in the range of one or any two of 0.05 μm, 0.1 μm, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, and 10 μm.

[0034] The average particle size of the pigment not only affects its dispersion effect in the polyethylene system, but the average particle size of the pigment is not the smaller the better or the higher the better. It is related to the reflection, scattering and other effects of the pigment in the system. Within the above-mentioned average particle size range of the pigment, the fiber can maintain a better coloring effect.

[0035] Preferably, the antioxidant includes at least one of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (antioxidant 1010), tris[2.4-di-tert-butylphenyl]phosphite (antioxidant 168), and β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate n-octadecanol (antioxidant 1076).

[0036] Antioxidants not only inhibit the degradation of the mechanical properties of fibers, but also because the degradation mechanism of pigments caused by ultraviolet rays, free radicals, etc. is similar to the degradation mechanism of fiber mechanical properties, they can also inhibit the change of fiber color tone and improve the color fastness of fibers to a certain extent.

[0037] The present application also provides an application of a colored flash-steamed nonwoven fabric in the preparation of cultural and creative printed materials, clothing, and daily-use devices. The colored flash-steamed nonwoven fabric of the present application has high tensile properties, uniform color, good coloring effect, and high color fastness, and is more suitable for use in the preparation of cultural and creative printed materials, clothing, and daily-use devices, and can effectively ensure its usability. In addition, the colored flash-steamed nonwoven fabric of the present application can be used in the form of a monofilament fiber, or in the form of a fiber cloth or a fiber film layer, and can be spun, woven, drawn, or drawn based on actual needs.

[0038] A method for preparing a colored flash-steamed nonwoven fabric comprises the following steps:

[0039] (1) low-density polyethylene, ethylene-vinyl acetate copolymer, dyeing aid, polyvinyl pyrrolidone, pigment, fatty alcohol polyoxyethylene ether, and antioxidant are blended, extruded, and granulated to obtain a masterbatch;

[0040] (2) mixing high-density polyethylene, masterbatch and solvent, and then heating and introducing nitrogen so that the temperature in the mixing device is greater than or equal to 200° C. and less than or equal to 230° C. and the pressure is greater than or equal to 10 MPa and less than or equal to 12 MPa to obtain a spinning solution.

[0041] (3) The spinning solution is subjected to flash spinning, cold pressing, and hot rolling to obtain a colored flash nonwoven fabric.

[0042] Preferably, the boiling point of the solvent is less than or equal to 100°C.

[0043] More preferably, the solvent includes at least one of benzene, toluene, butane, pentene, n-hexane, heptane, octane, cyclohexane, dichloromethane, carbon tetrachloride, chloroform, chloromethane, chlorofluoromethane, and ethyl chloride.

[0044] More preferably, the mass ratio of the solid phase to the liquid phase in the spinning solution is (10:90) to (30:70).

[0045] Compared with the prior art, the present application has the following beneficial effects: the present application improves the dispersion effect of the pigment by adding a dyeing auxiliary, and at the same time compounding an ethylene-vinyl acetate copolymer with better compatibility with the dyeing auxiliary to improve the compatibility of the dyeing auxiliary in the system, and also improves the dispersibility and wettability of the pigment and the dyeing auxiliary by polyvinyl pyrrolidone and fatty alcohol polyoxyethylene ether, thereby achieving the improvement of the coloring effect of the flash-spun non-woven fabric while maintaining the good tensile properties of the flash-spun non-woven fabric. DETAILED DESCRIPTION

[0046] In order to better illustrate the purpose, technical scheme and advantages of the present application, the present application will be further described below in conjunction with specific embodiments and comparative examples, the purpose of which is to understand the content of the present application in detail, rather than to limit the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. The experimental reagents and instruments involved in the implementation of the present application are all commonly used ordinary reagents and instruments unless otherwise specified.

[0047] Some of the raw materials used in the following examples and comparative examples are described:

[0048] HDPE: The melt index at 190°C and 2.16kg load is 6g / 10min, Qilu Petrochemical MH602.

[0049] LDPE: The melt index at 190°C and 2.16kg load is 25g / 10min, Sinopec LD400.

[0050] Polyoxyethylene (100) octadecyl ether: Sigma-Aldrich, HLB is 18.8.

[0051] Polyoxyethylene (10) octadecyl ether: Sigma-Aldrich, HLB 12.

[0052] Polyoxyethylene lauryl ether: Sigma-Aldrich, HLB 9.

[0053] Sodium dodecylbenzene sulfonate: HLB is 11.7, commercially available.

[0054] EVA: ExxonMobil LD728.PM of the United States.

[0055] PVP, K17, Hangzhou Hengquan Technology Development Co., Ltd.

[0056] PVP, K25, Hangzhou Hengquan Technology Development Co., Ltd.

[0057] PVP, K90, Hangzhou Hengquan Technology Development Co., Ltd.

[0058] Pigment: Monoazo lake pigment, Clariant Pigment Red 247, average particle size 180nm.

[0059] Wollastonite: Jiangxi Liyuan Powder Technology Co., Ltd., 2500M, average particle size is about 2-5μm.

[0060] Boron nitride: Yumu (Ningbo) New Materials Co., Ltd., BN-500Y, average particle size 500nm.

[0061] Sodium sulfate: commercially available, ground to a particle size of 0.8-1 μm.

[0062] The composite antioxidant is obtained by mixing antioxidant 1010 and antioxidant 168 in a 1:1 ratio, and both antioxidant 1010 and antioxidant 168 are commercially available.

[0063] Example 1

[0064] A colored flash-steamed nonwoven fabric, the composition of which is shown in Table 1, and the specific preparation method comprises the following steps:

[0065] (1) low-density polyethylene, ethylene-vinyl acetate copolymer, dyeing aid, polyvinyl pyrrolidone, pigment, fatty alcohol polyoxyethylene ether, and antioxidant are mixed, and then transferred into a twin-screw extruder for melt extrusion and granulation at 90-180° C. to obtain masterbatch. The temperature of the twin-screw extruder is set as follows: 90-110° C. in zone 1, 120-130° C. in zone 2, 150-160° C. in zone 3, 170-180° C. in zone 4, 170-185° C. in zone 5, 170-185° C. in zone 6, 160-165° C. in zone 7, 160-165° C. in zone 8, 160-165° C. in zone 9, and 160-165° C. in zone 10. The screw speed of the twin-screw extruder is 180-220 rpm.

[0066] (3) High-density polyethylene and masterbatch are mixed and then transferred to a reactor containing a mixed solvent of difluorochloromethane and tetrafluorodichloroethane (the volume ratio of difluorochloromethane and tetrafluorodichloroethane is 15:85), preheated to 180°C, then nitrogen is introduced and pressurized to 12 MPa, and finally heated to 225°C and stirred in a closed manner for 2 hours. After the temperature stabilizes, a spinning solution is obtained, in which the mass ratio of the solid phase to the liquid phase is 15:85.

[0067] (4) Referring to CN115323628B, a flash spinning device 300 or other conventional spinning devices may be used to transfer the spinning solution to the nozzle for spray spinning, which is then refracted and reflected by a rotating filament separator to form a mesh and laid on a moving mesh curtain. The speed of the ejected air flow is 12000 m / min, the frequency of the rotating filament separator is 35 Hz, and the forward speed of the moving mesh curtain is 45 m / min. The collected mesh is cold pressed at a pressure of 0.5 to 1 MPa and hot rolled at a pressure of 140°C and 3 to 3.5 MPa (the hot rolling roller surface speed is 45 to 50 m / min) to obtain a colored flash non-woven fabric with a thickness of about 0.12 mm.

[0068] Embodiments 2 to 12

[0069] The colored flash-steamed nonwoven fabrics of Examples 2 to 12 are different from those of Example 1 in terms of the components of the raw materials. The specific components are shown in Table 1, and the specific preparation method is the same as that of Example 1.

[0070] Comparative Examples 1 to 6

[0071] The colored flash-steamed nonwoven fabrics of Comparative Examples 1 to 6 are different from those of Example 1 in terms of the components of the raw materials. The specific components are shown in Table 2, and the specific preparation method is the same as that of Example 1.

[0072] Table 1

[0073]

[0074] Table 2

[0075]

[0076]

[0077] It should be noted that HLB-9, HLB-12 and HLB-18 mentioned in Tables 1 to 2 represent polyoxyethylene lauryl ether, polyoxyethylene (10) stearyl ether and polyoxyethylene (100) stearyl ether, respectively. The raw material components in Tables 1 to 2 are expressed in parts by weight.

[0078] In order to verify the performance of the colored flash nonwoven fabric of the present application, the products prepared in the above embodiments and comparative examples were subjected to the following performance tests, and the specific methods and qualified standards are as follows:

[0079] (1) Tensile properties: Tested in accordance with GB / T 328.9. Acceptable criteria: MD (longitudinal) greater than or equal to 180 N / 50 mm, CD (transverse) greater than or equal to 140 N / 50 mm, and elongation in MD (longitudinal) and CD (transverse) greater than or equal to 10%.

[0080] (2) Color fastness to rubbing: Tested in accordance with GB / T 3920, where the color fastness grades are 1, (1-2), 2, (2-3), 3, (3-4), 4, (4-5), and 5. Color fastness higher than grade (3-4) is qualified.

[0081] (3) Color difference: Tested in accordance with GB / T 8424.1, the color difference value (expressed as ΔE) is less than or equal to 1 to pass.

[0082] The above performance results are shown in Table 3 below.

[0083] Jia 3

[0084]

[0085]

[0086] It can be seen from Table 3 above that the tensile properties of the colored flash steamed nonwoven fabrics obtained in the above embodiments are MD (longitudinal) greater than or equal to 300N / 50mm, CD (transverse) greater than or equal to 230N / 50mm, and elongation greater than or equal to 12%. The color fastness of the colored flash steamed nonwoven fabrics obtained in the above embodiments is higher than (3-4) grades, and the color difference is less than 0.8. The colored flash steamed nonwoven fabrics of the present application maintain excellent tensile properties, and the colored flash steamed nonwoven fabrics are uniformly colored and have high color fastness. In the colored flash steamed nonwoven fabrics of the present application, the dyeing aid may increase the viscosity of the melt system to a certain extent, effectively transmit shear force during the melt blending process, and provide a grinding agent for easily agglomerated pigments in the system, which is beneficial to the dispersion of the pigments and to prevent the agglomeration of the pigments. At the same time. The dyeing aid is an inorganic material that can provide a certain filling effect and improve the strength and aging resistance of the fiber. However, the dyeing aid is an inorganic material and has poor compatibility with the matrix resin. Ethylene-vinyl acetate copolymer and the dyeing aid need to cooperate with each other. The dyeing aid tends to be compatible with ethylene-vinyl acetate copolymer. At the same time, polyvinyl pyrrolidone and fatty alcohol polyoxyethylene ether are used as dispersants and surfactants to improve the wettability and dispersion effect of the dyeing aid and pigment with the matrix resin while maintaining good tensile properties, improve the uniformity of fiber coloring and color fastness, and comprehensively achieve good mechanical properties and coloring properties.

[0087] It can be seen from Examples 1 to 4 that the dyeing agents sodium sulfate, boron nitride and wollastonite all have good dyeing effects, but in the case of boron nitride and wollastonite, the dyeing effect on the colored flash non-woven fabric is better. At the same time, it can be seen from Examples 1 and 5 to 6 that when the total amount of boron nitride and wollastonite is constant, the addition of boron nitride is greater than that of wollastonite, and the degree of improvement in tensile properties is greater.

[0088] It can be seen from Examples 1 and 7 to 8 that the HLB of fatty alcohol polyoxyethylene ether has a certain influence on the color fastness and color difference of the fiber. The HLB of fatty alcohol polyoxyethylene ether can be selected to be greater than or equal to 9-20, preferably greater than or equal to 12 and less than or equal to 18. Within the above HLB range of fatty alcohol polyoxyethylene ether, the colored flash non-woven fabric has higher color fastness and smaller color difference.

[0089] It can be seen from Examples 1 and 9 to 10 that the molecular weight of PVP affects the compounding effect with other components, resulting in a certain influence on the color fastness and color difference of the fiber. When the molecular weight of PVP is expressed as a K value, the K value of PVP is greater than or equal to 17 and less than or equal to 90, and more preferably greater than or equal to 20 and less than or equal to 30, the color fastness of the fiber is higher and the color difference is smaller.

[0090] Compared with Examples 1 to 12, Comparative Example 1 lacks EVA, and the dyeing agent is unevenly dispersed, resulting in poor compatibility of the system, reducing the overall performance of the fiber, and it cannot effectively disperse the pigment, and the color difference increases significantly. Comparative Example 2 lacks a dyeing agent, which cannot play the role of filler to enhance the strength of the fiber, and because the pigment in the system is easy to agglomerate, the color difference of the fiber increases significantly. Comparative Example 3 uses too much dyeing agent. Because the dyeing agent is an inorganic material, it is added excessively, resulting in it being unable to be better compatible with the system resin, causing the elongation of the fiber to decrease significantly, and because of its uneven dispersion, the color difference of the fiber increases. Comparative Example 4 lacks PVP, and the dispersion effect of the dyeing agent and pigment in the fiber is relatively poor, and the coloring performance of the pigment is poor, resulting in a significant decrease in the color fastness of the fiber, and a certain degree of decrease in color uniformity. Comparative Example 5 lacks fatty alcohol polyoxyethylene ether, which reduces the dispersion effect of the dyeing agent and pigment in the fiber, and the wetting effect of the pigment on the resin is poor, resulting in a sharp decrease in the color fastness of the fiber, and a certain degree of decrease in color uniformity. Comparative Example 6 uses an equal amount of sodium dodecylbenzene sulfonate to replace fatty alcohol polyoxyethylene ether. Compared with other types of surfactants, fatty alcohol polyoxyethylene ether has better dispersion and wetting effects on pigments, making the colored flash non-woven fabric have higher color fastness and smaller color difference.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application rather than to limit the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present application.

Claims

1. A colored flash-steamed nonwoven fabric, characterized in that: The invention comprises the following components in parts by weight: 100 parts of high-density polyethylene, 10-30 parts of low-density polyethylene, 3-8 parts of ethylene-vinyl acetate copolymer, 0.5-5 parts of dyeing assistant, 1-4 parts of polyvinyl pyrrolidone, 0.5-6 parts of pigment, 0.05-1.5 parts of fatty alcohol polyoxyethylene ether and 0.1-1 parts of antioxidant. The dyeing assistant comprises at least one of sodium sulfate, boron nitride and wollastonite.

2. The colored flash-steamed nonwoven fabric according to claim 1, characterized in that: The dyeing aids are boron nitride and wollastonite, and the mass ratio of the boron nitride to wollastonite is (0.5-1.5): (0.5-1.5).

3. The colored flash-steamed nonwoven fabric according to claim 1, characterized in that: The HLB of the fatty alcohol polyoxyethylene ether is greater than or equal to 9 and less than or equal to 20.

4. The colored flash-steamed nonwoven fabric according to claim 1, characterized in that: The fatty alcohol polyoxyethylene ether includes at least one of polyoxyethylene octadecyl ether and polyoxyethylene lauryl ether.

5. The colored flash-steamed nonwoven fabric according to claim 1, characterized in that: The high-density polyethylene has a melt index of greater than or equal to 5 g / 10 min and less than or equal to 15 g / 10 min at 190° C. and a load of 2.16 kg according to ASTM D1238.

6. The colored flash-steamed nonwoven fabric according to claim 1, characterized in that: The low-density polyethylene has a melt index of greater than or equal to 20 g / 10 min and less than or equal to 30 g / 10 min at 190° C. and a load of 2.16 kg according to ASTM D1238.

7. The colored flash-steamed nonwoven fabric according to claim 1, characterized in that: The pigment includes at least one of an organic pigment and an inorganic pigment.

8. The colored flash-steamed nonwoven fabric according to claim 1, characterized in that: The K value of the polyvinyl pyrrolidone is greater than or equal to and less than or equal to 90.

9. A method for preparing a colored flash-steamed nonwoven fabric according to any one of claims 1 to 8, characterized in that: The steps include: (1) low-density polyethylene, ethylene-vinyl acetate copolymer, dyeing aid, polyvinyl pyrrolidone, pigment, fatty alcohol polyoxyethylene ether, and antioxidant are blended, extruded, and granulated to obtain a masterbatch; (2) mixing high-density polyethylene, the masterbatch and a solvent, and then heating and introducing nitrogen so that the temperature in the mixing device is greater than or equal to 200° C. and less than or equal to 230° C., and the pressure is greater than or equal to 10 MPa and less than or equal to 12 MPa, to obtain a spinning solution; (3) The spinning solution is subjected to flash spinning, cold pressing, and hot rolling to obtain the colored flash nonwoven fabric.

10. Use of the colored flash-steamed nonwoven fabric according to any one of claims 1 to 8 in the preparation of cultural and creative printed products, clothing, and daily-use devices.

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