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

Abstract

The invention discloses a colored flash non-woven fabric as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The colored flash non-woven fabric comprises colored flash fibers, wherein the colored flash fibers comprise the following components in parts by weight: 90-100 parts of ultra-high molecular weight polyethylene, 2-5 parts of linear low density polyethylene, 0.5-2 parts of a coloring agent and 0.01-0.1 part of hydroxyl-terminated polybutadiene. The coloring agent and the hydroxyl-terminated polybutadiene are added into the product, so that the color uniformity and color fastness of the product are improved on the basis of ensuring the mechanical property and waterproof property of the product, and the service life of the product is long when the product is applied to cultural and creative presswork, clothes or household products.

Description

Technical Field

[0001] The present application relates to the technical field of polymer materials, and in particular to a colored flash-steamed nonwoven fabric and a preparation method and application thereof. Background Art

[0002] Flash non-woven fabric is a non-woven fabric product formed by extruding a polymer (generally polyethylene) solution above the boiling point of the solvent and under high pressure into a normal pressure environment. Due to the rapid change in pressure, the solution is converted into fiber strands. Compared with traditional non-woven fabric materials, it not only has high molding efficiency and uniform microstructure, but also has ideal mechanical strength and protective effect. At the same time, it has a light weight and is very suitable for the field of medical protective packaging.

[0003] During the production process, undyed raw materials are directly made through processes such as spinning, web forming, and reinforcement, so their original color is usually white or close to the color of the fiber itself. In order to meet the color needs of different fields, flash non-woven fabrics are often added and changed in color through the process of post-spinning coloring. However, due to the special fiber structure and surface properties of flash non-woven fabrics, the ink may be difficult to penetrate evenly and firmly adhere to the fiber surface during the post-spinning coloring process, resulting in uneven color or easy shedding. In addition, the ink used for post-spinning coloring may affect the breathability of the flash non-woven fabric. At the same time, the ink may gradually fade or wear due to friction, washing and other factors, affecting the appearance and service life of the product. Organic pigments have the advantages of bright and obvious colors, complete color spectrum and high tinting power. They can improve the color fastness of non-woven fabrics through pre-spinning coloring. However, organic pigments have low temperature resistance, most of which are below 200°C. In the flash spinning production process, the spinning solution needs to be treated in a high temperature and high pressure environment for a long time. Organic pigments are affected by temperature, pressure and spinning solvents during the flash spinning process and are prone to deterioration, resulting in poor color uniformity and color fastness of the prepared fiber products. Summary of the invention

[0004] Based on the defects of the prior art, the purpose of this application is to provide a colored flash-steamed non-woven fabric and its preparation method and application. Colorants and terminal hydroxyl polybutadiene are added to the product. On the basis of ensuring the mechanical properties and waterproof properties of the product, the color uniformity and color fastness of the product are improved. The product has a long service life when used in cultural and creative printed materials, clothing or household products.

[0005] In order to achieve the above purpose, the technical solution adopted by this application is:

[0006] A colored flash-steamed nonwoven fabric comprises colored flash-steamed fibers, wherein the colored flash-steamed fibers comprise the following components in parts by weight: 90-100 parts of ultra-high molecular weight polyethylene, 2-5 parts of linear low-density polyethylene, 0.5-2 parts of a colorant, and 0.01-0.1 parts of terminal hydroxyl polybutadiene.

[0007] In some embodiments, the viscosity of the hydroxy-terminated polybutadiene at 30° C. is greater than or equal to 5 Pa·s and less than or equal to 50 Pa·s.

[0008] In some embodiments, the colorant is an organic pigment.

[0009] In some embodiments, the linear 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 2.16 kg load according to ASTM D1238.

[0010] In some embodiments, the colored flash-spun fibers further include high-density polyethylene, and the weight percentage of the high-density polyethylene in the colored flash-spun fibers is 0.4-1.2 parts.

[0011] In some embodiments, the high density polyethylene has a melt index of greater than or equal to 0.1 g / 10 min and less than or equal to 1 g / 10 min at 190° C. and 2.16 kg load according to ASTM D1238.

[0012] In a second aspect, the present application provides a method for preparing a colored flash-steamed nonwoven fabric, comprising the following steps:

[0013] The colorant, the terminal hydroxyl polybutadiene and the first solvent are mixed uniformly to obtain a colored slurry.

[0014] The remaining components in the colored flash non-woven fabric and the colored slurry are added to a mixing device containing a second solvent, and then heated and nitrogen is introduced 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 10MPa and less than or equal to 12MPa, to obtain a spinning solution.

[0015] The spinning solution is placed in a flash spinning device for spinning and received by a receiving device to form a film. The obtained fiber film is cold pressed and hot rolled to obtain a colored flash non-woven fabric.

[0016] In some embodiments, based on 100% of the total mass of the colored slurry, the total mass of the colorant and the hydroxyl-terminated polybutadiene is 5-15%.

[0017] On the other hand, the invention provides the use of colored flash-steamed nonwoven fabric in the preparation of cultural and creative printed materials, clothing or household products.

[0018] In some embodiments, the colored flash nonwoven fabric is combined in cultural and creative printed products, clothing or household products by at least one of embedding, bonding and heat sealing.

[0019] The beneficial effect of the present application is that the present application provides a colored flash-steamed non-woven fabric and a preparation method thereof, and colorants and terminal hydroxyl polybutadiene are added to the product, which improves the color uniformity and color fastness of the product while ensuring the mechanical properties and waterproof properties of the product, and has a long service life when used in the protection field. DETAILED DESCRIPTION

[0020] In order to facilitate understanding of the present disclosure, the present disclosure will be described more fully below. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present disclosure more thorough and comprehensive.

[0021] As used herein:

[0022] "Prepared from" is synonymous with "comprising." As used herein, the terms "comprising," "including," "having," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises the listed elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

[0023] The conjunction "consisting of excludes any unspecified element, step, or component. If used in a claim, this phrase renders the claim closed-ended so that it does not include materials other than those described, except for conventional impurities associated therewith. When the phrase "consisting of" appears in a clause of the body of a claim rather than immediately following the subject matter, it limits only the elements described in that clause; other elements are not excluded from the claim as a whole.

[0024] When amount, concentration or other value or parameter is represented by range, preferred range or a series of upper preferred value and lower preferred value, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value and any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when disclosing range "1-5", described range should be interpreted as including range "1-4", "1-3", "1-2", "1-2 and 4-5", "1-3 and 5" etc. When numerical range is described in this article, unless otherwise stated, the range is intended to include its end value and all integers and fractions within the range.

[0025] In these examples, parts and percentages are by mass unless otherwise indicated.

[0026] "Parts by mass" refers to the basic unit of measurement for expressing the mass ratio of multiple components. 1 part can represent any unit mass, such as 1g or 2.689g. If we say that the mass of component A is a parts and the mass of component B is b parts, it means the ratio of the mass of component A to the mass of component B is a:b. Alternatively, it means that the mass of component A is aK and the mass of component B is bK (K is an arbitrary number, indicating a multiple factor). It should not be misunderstood that, unlike the mass parts, the sum of the mass of all components is not limited to 100 parts.

[0027] "And / or" is used to indicate that one or both of the stated situations may occur, for example, A and / or B includes (A and B) and (A or B).

[0028] A colored flash-steamed nonwoven fabric comprises colored flash-steamed fibers, wherein the colored flash-steamed fibers comprise the following components in parts by weight: 90-100 parts of ultra-high molecular weight polyethylene, 2-5 parts of linear low-density polyethylene, 0.5-2 parts of a colorant, and 0.01-0.1 parts of terminal hydroxyl polybutadiene.

[0029] For example, in different embodiments, the weight proportion of the ultra-high molecular weight polyethylene may be, but is not limited to, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, or 100 parts.

[0030] For example, in different embodiments, the weight proportion of the linear low density polyethylene may be, but is not limited to, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, or 5 parts.

[0031] For example, in different embodiments, the weight proportion of the colorant may be, but is not limited to, 0.5 parts, 0.8 parts, 1 parts, 1.2 parts, 1.5 parts, 1.7 parts, or 2 parts.

[0032] For example, in different embodiments, the weight portion of the hydroxy-terminated polybutadiene may be, but is not limited to, 0.01 part, 0.03 part, 0.05 part, 0.08 part, or 0.1 part.

[0033] In the technical solution of the present application, in order to improve the processing performance and coloring performance of ultra-high molecular weight polyethylene, linear low-density polyethylene is added to the component system of colored flash non-woven fibers. However, linear low-density polyethylene and ultra-high molecular weight polyethylene are difficult to form a uniform form, which will lead to a decrease in the mechanical properties and coloring properties of the product. For this reason, in the above-mentioned matrix resin system, terminal hydroxyl polybutadiene is added to the present application. On the one hand, terminal hydroxyl polybutadiene can improve the compatibility of linear low-density polyethylene and ultra-high molecular weight polyethylene and improve the mechanical properties of the product. On the other hand, terminal hydroxyl polybutadiene acts as a dispersant for the colorant to anchor the colorant at multiple points. One end of the anchoring group is entangled and adsorbed with the matrix resin, and the other end is coated with the colorant particles, which plays a role in dispersing the colorant. On the other hand, the solvated chain of terminal hydroxyl polybutadiene has a lubricating effect, improves the dispersion effect of the colorant, reduces stress concentration caused by pigment agglomerates, and improves the mechanical properties, color uniformity and color fastness of the product.

[0034] In some embodiments, the viscosity of the hydroxy-terminated polybutadiene at 30° C. is greater than or equal to 5 Pa·s and less than or equal to 50 Pa·s.

[0035] For example, in different embodiments, the viscosity of the hydroxy-terminated polybutadiene at 30° C. may be, but is not limited to, 5 Pa·s, 8 Pa·s, 10 Pa·s, 15 Pa·s, 20 Pa·s, 25 Pa·s, 30 Pa·s, 35 Pa·s, 40 Pa·s, 45 Pa·s, or 50 Pa·s.

[0036] In the present application, the viscosity of the hydroxy-terminated polybutadiene is too low, the anchoring effect of the hydroxy-terminated polybutadiene is small, and the dispersibility of the colorant is poor. Within the above range, as the viscosity increases, the dispersibility of the colorant is good, which is conducive to improving the mechanical properties, color uniformity and color fastness of the product. However, when the viscosity of the hydroxy-terminated polybutadiene is too high, the viscosity of the polymer matrix will increase significantly, the colorant will easily agglomerate, causing stress concentration, and affecting the mechanical properties, color uniformity and color fastness of the product.

[0037] In some embodiments, the colorant is an organic pigment.

[0038] Specifically, the organic pigments include red organic pigments, green organic pigments, yellow organic pigments, and fluorescent color organic pigments.

[0039] Preferably, the red organic pigment is at least one of Pigment Red 254 and Pigment Red 185.

[0040] Preferably, the green organic pigment is at least one of phthalocyanine green G, phthalocyanine green GW and phthalocyanine green GH.

[0041] Preferably, the yellow organic pigment is at least one of H2R yellow, H4G yellow, HG yellow, HGR yellow, HR02 yellow, HR yellow, H3R yellow, H10G yellow, GR yellow, H2R yellow, G180 yellow, G151 yellow, Permanent Yellow 2G, Permanent Yellow GR, Fast Yellow G, Pigment Yellow 151, Fast Yellow 10G, Permanent Yellow 5GX, 138 yellow, 168 yellow, Permanent Yellow HR, Permanent Yellow 2GS, Benzidine Yellow G, Permanent Yellow SD-BRL, Permanent Yellow G, Permanent Yellow SDGTL, Permanent Yellow SD-TRP, Permanent Yellow HRZ, Permanent Yellow HR-03, Permanent Yellow SD-FGL, Permanent Yellow SD-GRP, New Benzidine Yellow SD-GRX, Permanent Yellow SD-3RP, and Permanent Yellow SD-2RP.

[0042] Preferably, the fluorescent organic pigment is 10G yellow and / or 8G yellow.

[0043] In some embodiments, the linear 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 2.16 kg load according to ASTM D1238.

[0044] For example, in different embodiments, the melt index of the linear low density polyethylene at 190° C. and 2.16 kg load according to ASTM D1238 may be, but is not limited to, 20 g / 10 min, 22 g / 10 min, 25 g / 10 min, 28 g / 10 min, or 30 g / 10 min.

[0045] In some embodiments, the colored flash-spun fibers further include high-density polyethylene, and the weight percentage of the high-density polyethylene in the colored flash-spun fibers is 0.4-1.2 parts.

[0046] For example, in different embodiments, the weight fraction of high density polyethylene in the composition of the colored flash-steamed fiber can be, but is not limited to, 0.4 parts, 0.6 parts, 0.8 parts, 1 part, or 1.2 parts.

[0047] In the technical solution of the present application, the terminal hydroxyl polybutadiene can make the high-density polyethylene compatible with other components, and after being added to the high-density polyethylene, it can improve the processing performance of the product and enhance the mechanical properties and waterproof properties of the product.

[0048] Although high-density polyethylene can improve the processing performance of the product to a certain extent, this component still has a certain incompatibility with ultra-high molecular weight polyethylene and linear low-density polyethylene. Therefore, if too much is added, the performance improvement effect of the product may be reduced or even decreased to a certain extent.

[0049] In some embodiments, the melt index of the high-density polyethylene at 190°C and 2.16 kg load according to ASTM D1238 is greater than or equal to 0.1 g / 10 min and less than or equal to 1 g / 10 min; for example, it can be but is not limited to 0.1 g / 10 min, 0.3 g / 10 min, 0.5 g / 10 min, 0.8 g / 10 min, and 1 g / 10 min.

[0050] In a second aspect, the present application provides a method for preparing a colored flash-steamed nonwoven fabric, comprising the following steps:

[0051] The colorant, the terminal hydroxyl polybutadiene and the first solvent are mixed uniformly to obtain a colored slurry.

[0052] The remaining components in the colored flash non-woven fabric and the colored slurry are added to a mixing device containing a second solvent, and then heated and nitrogen is introduced 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 10MPa and less than or equal to 12MPa, to obtain a spinning solution.

[0053] The spinning solution is placed in a flash spinning device for spinning and received by a receiving device to form a film. The obtained fiber film is cold pressed and hot rolled to obtain a colored flash non-woven fabric.

[0054] Preferably, the boiling points of the first solvent and the second solvent are each independently ≤ 400°C.

[0055] More preferably, the first solvent and the second solvent are each independently selected from at least one of white oil, decahydronaphthalene, paraffin, kerosene, olefin mineral oil, benzene, toluene, butane, pentene, n-hexane, heptane, octane, cyclohexane, dichloromethane, carbon tetrachloride, chloroform, chloromethane, chlorofluoromethane, and ethyl chloride.

[0056] In the present application, the first solvent and the second solvent may be the same or different. In order to further improve the mixing uniformity of each component, the present application preferably uses the same first solvent and second solvent.

[0057] More preferably, the mass ratio of the solid phase to the liquid phase in the spinning solution is (10:90)-(30:70).

[0058] More preferably, the flash spinning device is prepared using the production equipment 300 used by the inventor in the prior research and development technology CN115323628B.

[0059] It should be noted that the products of the present application are not limited to the production of the above-mentioned production equipment. Technical personnel in this field may also adopt other types of flash production equipment to produce products according to actual needs, as long as products with the same technical characteristics and technical effects can be prepared.

[0060] In some embodiments, based on 100% of the total mass of the colored slurry, the total mass of the colorant and the hydroxyl-terminated polybutadiene is 5-15%.

[0061] As in different embodiments, based on the total mass of the colored slurry as 100%, the total mass of the colorant and the hydroxy-terminated polybutadiene can be but is not limited to 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%.

[0062] In the preparation process of colored flash non-woven fabrics, the colorant and terminal hydroxyl polybutadiene are prepared into a colored slurry, which is then mixed with other components to prepare a spinning solution. The anchoring effect between the terminal hydroxyl polybutadiene and the colorant improves the dispersibility of the colorant, and improves the color uniformity and color fastness of the product. In the colored slurry, the mass percentage of the colorant and the terminal hydroxyl group will affect the dispersibility of the colorant, resulting in a decrease in the color uniformity and color fastness of the product.

[0063] On the other hand, the invention provides the use of colored flash-steamed nonwoven fabric in the preparation of cultural and creative printed materials, clothing or household products.

[0064] Preferably, cultural and creative printed products, clothing or household products contain the colored flash-steamed non-woven fabric of the present application, and the colored flash-steamed non-woven fabric is combined in the medical device protection product by at least one method including but not limited to embedding, bonding or heat sealing.

[0065] Preferably, the cultural and creative printed products include but are not limited to at least one of canvas bags, stickers, refrigerator magnets, and hand-torn books.

[0066] Preferably, the household product includes but is not limited to at least one of a luggage bag, a storage bag, a seat cover, a carpet, a mattress, a door curtain, and an umbrella.

[0067] The colored flash-steamed non-woven fabric of the present application has high mechanical properties, waterproof properties, color uniformity and color fastness, and can be widely used in cultural and creative printed products, clothing or household products. On the basis of ensuring the mechanical properties and waterproof properties of the product, it also has high color fastness to friction and color fastness to hypochlorite, and can be washed many times without changing color, thereby extending the service life of the product.

[0068] The raw materials used in the embodiments and comparative examples are described below, but are not limited to these materials:

[0069] The ultra-high molecular weight polyethylene (UHWPE) is GUR-1050E produced by Ticona in the United States.

[0070] The linear low-density polyethylene (LLDPE) was product 7144 produced by Sinopec, and had a melt index of 22 g / 10 min at 190°C and a load of 2.16 kg.

[0071] The high-density polyethylene (HDPE) is 5502 product produced by Maoming Petrochemical, and its melt index at 190°C and 2.16kg load is 0.35g / 10min.

[0072] The hydroxy-terminated polybutadiene 1 (HTPB-1) is CS-15 produced by ARC, and has a viscosity of 26 Pa·s at 30°C.

[0073] The hydroxy-terminated polybutadiene 2 (HTPB-2) is CS-15 produced by Sinclair Company of the United States, and has a viscosity of 20 Pa·s at 30°C.

[0074] The hydroxy-terminated polybutadiene 3 (HTPB-3) is Lithene N4-5000 produced by Shanghai Xintema Chemical Co., Ltd., and has a viscosity of 11 Pa·s at 30°C.

[0075] The hydroxy-terminated polybutadiene 4 (HTPB-4) is R-45HT produced by Idemitsu Co., Ltd. of Japan, and has a viscosity of 5 Pa·s at 30°C.

[0076] The hydroxy-terminated polybutadiene 5 (HTPB-5) is CN-15 produced by ARC, and has a viscosity of 50 Pa·s at 30°C.

[0077] Example 1

[0078] The present application discloses a colored flash-steamed nonwoven fabric and an embodiment of a preparation method thereof. The components of the colored flash-steamed fibers in the colored flash-steamed nonwoven fabric are shown in Table 1.

[0079] The method for preparing a colored flash-steamed nonwoven fabric comprises the following steps:

[0080] (1) Preparation of colored slurry: The colorant, the hydroxyl-terminated polybutadiene and the first solvent are mixed uniformly to obtain a colored slurry, wherein the total mass of the colorant and the hydroxyl-terminated polybutadiene is 10% of the mass of the colored slurry.

[0081] (2) Preparation of spinning solution: Ultra-high molecular weight polyethylene, linear low density polyethylene, high density polyethylene and colored slurry are mixed and then transferred to a reactor containing a second solvent, preheated to 180°C, and then nitrogen is introduced and pressurized to 12 MPa. a Finally, the temperature was raised to 225°C and stirred in a closed state for 2 hours. After the temperature stabilized, a spinning solution was obtained. The mass ratio of the solid phase to the liquid phase in the spinning solution was 15:85.

[0082] (3) Preparation of colored flash-steamed nonwoven fabric: Referring to CN1 / 5323628B, a flash spinning device 300 was used to transfer the spinning solution to the nozzle for spray spinning, and then the spinning solution was 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 was 12000 m / min, the frequency of the rotating filament separator was 35 Hz, and the forward speed of the moving mesh curtain was 45 m / min. The collected mesh was 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 was 45 to 50 m / min) to obtain a colored flash-steamed nonwoven fabric with a thickness of about 0.12 mm.

[0083] Wherein, the first solvent and the second solvent are both mixed solvents of white oil and tetrafluorodichloroethane, and the volume ratio of white oil to tetrafluorodichloroethane is 15:85.

[0084] Embodiment 4-10

[0085] A colored flash-steamed nonwoven fabric and a preparation method thereof, which differs from Example 1 only in that the components of the product are different, as shown in Table 1.

[0086] Embodiment 11

[0087] A colored flash nonwoven fabric and a preparation method thereof, which differs from Example 1 only in that: step (1) in the preparation method of the product is different. Step (1) in the preparation method of the flash nonwoven fabric in this embodiment is: mixing a colorant, terminal hydroxyl polybutadiene and a first solvent uniformly to obtain a colored slurry, wherein the total mass of the colorant and the terminal hydroxyl polybutadiene is 5% of the mass of the colored slurry.

[0088] Example 12

[0089] A colored flash nonwoven fabric and a preparation method thereof, which differs from Example 1 only in that: step (1) in the preparation method of the product is different. Step (1) in the preparation method of the flash nonwoven fabric in this embodiment is: mixing a colorant, terminal hydroxyl polybutadiene and a first solvent uniformly to obtain a colored slurry, wherein the total mass of the colorant and the terminal hydroxyl polybutadiene is 15% of the mass of the colored slurry.

[0090] Comparative Examples 1-5

[0091] The difference between the comparative examples and the embodiments is only in the types and proportions of components, as shown in Table 2.

[0092] Comparative Example 6

[0093] A colored flash nonwoven fabric and a preparation method thereof, which differs from Example 1 only in that: step (1) in the preparation method of the product is different. Step (1) in the preparation method of the flash nonwoven fabric in this comparative example is: mixing a colorant, terminal hydroxyl polybutadiene and a first solvent uniformly to obtain a colored slurry, wherein the total mass of the colorant and the terminal hydroxyl polybutadiene is 3% of the mass of the colored slurry.

[0094] Comparative Example 7

[0095] A colored flash nonwoven fabric and a preparation method thereof, which differs from Example 1 only in that: step (1) in the preparation method of the product is different. Step (1) in the preparation method of the flash nonwoven fabric in this comparative example is: mixing a colorant, terminal hydroxyl polybutadiene and a first solvent uniformly to obtain a colored slurry, wherein the total mass of the colorant and the terminal hydroxyl polybutadiene is 20% of the mass of the colored slurry.

[0096] It should be noted that the product composition ratios used in the embodiments and comparative examples of the present application are weight percentages rather than mass percentages.

[0097] The colorant in Example 1, Examples 4-14 and Comparative Examples 1-9 is a mixture of Phthalocyanine Green G and Permanent Yellow GR in a mass ratio of 1:1, the colorant in Example 2 is Pigment Red 254, and the colorant in Example 3 is a mixture of Pigment Red 185:10G Yellow in a mass ratio of 2:1.

[0098] Table 1

[0099]

[0100]

[0101] Table 2

[0102] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 UHWPE 95 95 95 95 95 95 95 LLDPE 3 3 3 3 3 3 3 HDPE 0.6 0.6 0.6 0.6 0.6 0.6 0.6 Colorants 1 1 1 1 1 1 1 HTPB-1 / / / / / 0.05 0.05 Alkylphenol polyoxyethylene ether / 0.05 / / / / / Sodium lignin sulfonate / / 0.05 / / / / Ethoxylated fatty acid alcohol amine / / / 0.05 / / / Sodium Methylene Bis-Tetradecanoate / / / / 0.05 / /

[0103] In order to verify the performance of the colored flash-steamed nonwoven fabric of the present application, the products prepared in each embodiment and comparative example were subjected to the following performance tests, and the specific steps are as follows:

[0104] (1) Mechanical properties: The products of each embodiment and comparative example were tested according to GB / T 3917.3.

[0105] (2) Hydrostatic pressure resistance: The products of each embodiment and comparative example were tested according to GB / T 4744 (pressure increase rate 6 kPa / min).

[0106] (3) Color uniformity: The products of each embodiment and comparative example were tested according to GB / T 8424.3.

[0107] (4) Color fastness to rubbing: The products of each embodiment and comparative example were tested according to GB / T3920.

[0108] (5) Color fastness to hypochlorite bleaching: The products of each embodiment and comparative example were tested according to GB / T7069.

[0109] The test results are shown in Tables 3 and 4.

[0110] Table 3

[0111]

[0112]

[0113] Table 4

[0114] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Tear strength-direction A(N) 17 21 20 19 21 24 19 Tearing strength-direction B(N) 13 16 16 17 18 20 16 Hydrostatic pressure resistance (kPa) 12.9 11.75 12.45 13.65 11.4 11.65 12.45 Chromatic Aberration 6.5 5.1 5.5 5.3 4.9 2.9 3.2 Color fastness to dry rubbing 2-3 2 2-3 2 2-3 3 3-4 Color fastness to hypochlorite bleaching 1-2 2 2 2 2-3 2-3 2-3

[0115] It can be seen from Tables 3 and 4 that the colored flash-steamed non-woven fabrics prepared in the embodiments of the present application have good mechanical properties and waterproof properties, the tear strength in direction A reaches more than 21N, the tear strength in direction B reaches more than 17N, the hydrostatic pressure resistance reaches more than 12.1kPa, the color uniformity and color fastness are high, the color difference is less than 0.65, and the color fastness to dry friction and the color fastness to hypochlorite bleaching both reach level 4 or above.

[0116] By comparing Example 1 with Examples 4-7, it can be seen that the viscosity of the hydroxy-terminated polybutadiene affects the mechanical properties, waterproof properties, color difference and color fastness of the product. When the viscosity of the hydroxy-terminated polybutadiene is 10-30 Pa·s at 30°C, the mechanical properties, waterproof properties, color difference and color fastness of the obtained product are improved.

[0117] By comparing Example 1 and Examples 8-11, it can be seen that the introduction of 0.4-1 weight parts of high-density polyethylene into the colored flash-steamed fibers improves the mechanical properties and waterproof properties of the product to a certain extent. However, when the addition amount of high-density polyethylene is 1.5 weight parts, the performance of the product no longer continues to improve due to the limited compatibility of the entire system with high-density polyethylene.

[0118] By comparing Example 1 with Comparative Example 1, it can be seen that the colored flash-steamed fiber lacks terminal hydroxyl polybutadiene, the colored flash-steamed non-woven fabric has poor mechanical properties and color fastness, and poor color uniformity.

[0119] By comparing Example 1 with Comparative Examples 1-5, it can be seen that in Comparative Examples 2-5, other auxiliary agents are used as dispersants for the colorants, and at least one of the mechanical properties, waterproof properties, color uniformity and color fastness of the products is significantly reduced.

[0120] By comparing Example 1, Examples 12-13 and Comparative Examples 6-7, it can be seen that during the preparation process, based on the total mass of the colored slurry as 100%, if the total mass of the colorant and the terminal hydroxyl polybutadiene is less than 5% or greater than 15%, even if the colored flash fiber formula of the product is the same, the performance of the product will not meet the standard due to the adjustment of the process.

[0121] 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 colored flash-steamed fiber comprises the following components in parts by weight: 90-100 parts of ultra-high molecular weight polyethylene, 2-5 parts of linear low-density polyethylene, 0.5-2 parts of colorant, and 0.01-0.1 parts of terminal hydroxyl polybutadiene.

2. The colored flash-steamed nonwoven fabric according to claim 1, characterized in that: The viscosity of the hydroxy-terminated polybutadiene at 30° C. is greater than or equal to 5 Pa·s and less than or equal to 50 Pa·s.

3. The colored flash-steamed nonwoven fabric according to claim 1, characterized in that: The colorant is an organic pigment.

4. The colored flash-steamed nonwoven fabric according to claim 1, characterized in that: The linear 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.

5. The colored flash-steamed nonwoven fabric according to claim 1, characterized in that: The colored flash evaporated fiber also includes high-density polyethylene, and the weight proportion of the high-density polyethylene in the colored flash evaporated fiber is 0.4-1.2 parts.

6. The colored flash-steamed nonwoven fabric according to claim 5, characterized in that: The high-density polyethylene has a melt index of greater than or equal to 0.1 g / 10 min and less than or equal to 1 g / 10 min at 190° C. and a load of 2.16 kg according to ASTM D1238.

7. A method for preparing a colored flash-steamed nonwoven fabric according to any one of claims 1 to 6, characterized in that: The following steps are involved: Mixing the colorant, the hydroxy-terminated polybutadiene and the first solvent uniformly to obtain a colored slurry; The remaining components in the colored flash non-woven fabric and the colored slurry are added to a mixing device containing a second solvent, and then heated and nitrogen is introduced 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; The spinning solution is placed in a flash spinning device for spinning to obtain a colored flash nonwoven fabric.

8. The method for preparing a colored flash-steamed nonwoven fabric according to claim 7, characterized in that: Based on the total mass of the colored slurry being 100%, the total mass of the colorant and the hydroxy-terminated polybutadiene is 5-15%.

9. Use of the colored flash-steamed nonwoven fabric according to any one of claims 1 to 6 in the preparation of cultural and creative printed products, clothing or household products.

10. The use according to claim 9, characterized in that The colored flash-steamed non-woven fabric is combined in the cultural and creative printed product, clothing or household product by at least one of embedding, bonding and heat sealing.

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