Nonwoven fabric having a cooling sensation and method for manufacturing the same

Abstract

The application relates to the field of non-woven fabrics, in particular to a non-woven fabric with a cooling feeling and a preparation method thereof, which comprises the following steps: 1) island fibers are scattered, stacked and needled to obtain a needled fabric; 2) the needled fabric is heated to 100-130 DEG C and preheated for 1-5 min, then is conveyed to a heat-dissipation cooling treatment liquid with a temperature of 50-60 DEG C, is immersed for 10-20 min, is extruded and is dried to a humidity of 40-69%, so that a heat-dissipation cooling fabric is obtained; 3) the heat-dissipation cooling fabric is conveyed to a glue dipping liquid for glue dipping treatment, is heated to 80 DEG C-120 DEG C and is dried for 1-10 min, so that a glue-dipped fabric is obtained; and 4) the glue-dipped fabric is cut and flattened to obtain a non-woven fabric with a cooling feeling; the needled fabric is treated with a heat-conduction cooling liquid and a glue dipping liquid in sequence, a coating film is formed, the cooling particles of the heat-dissipation cooling film can be prevented from volatilizing too fast, and the cooling durability of the non-woven fabric is improved.

Description

Technical Field

[0001] This application relates to the field of nonwoven fabrics, and more specifically, to a nonwoven fabric with a cooling sensation and a method for preparing the same. Background Technology

[0002] Non-woven fabric, also known as non-woven cloth, needle-punched cotton, or needle-punched non-woven fabric, is made from polyester fibers and produced through a needle-punching process, allowing for variations in thickness, feel, and hardness. Non-woven fabric is characterized by its moisture-proof, breathable, flexible, lightweight, flame-retardant, non-toxic, odorless, inexpensive, and recyclable properties. It can be used in various industries, such as sound insulation, heat insulation, heating elements, masks, clothing, medical applications, filling materials, sofas, and cushions.

[0003] With the advancement of science, nonwoven fabrics produced by needle punching of island fibers now have good softness, and their thickness, hardness, and hand feel can all be controlled. Therefore, they are widely used, such as in car seat cushions and sofa cushions. However, nonwoven fabrics themselves have heat insulation and heat preservation functions, which can make them quite stuffy in summer. Therefore, related research has shown that nonwoven fabrics produced by blending graphite fibers, bamboo fibers, bamboo charcoal fibers, etc., with polyester fibers have high heat dissipation properties and can also make them feel cool to the touch.

[0004] However, for nonwoven fabrics produced by needle punching, graphite fibers, bamboo fibers, and bamboo charcoal fibers have relatively poor flexibility and are prone to breakage during the needle punching process, thus affecting the physical properties of the nonwoven fabric. Some manufacturers also use thermally conductive fillers such as graphene and boron nitride to fill polyester materials to produce thermally conductive fibers. However, the nonwoven fabrics obtained from the mass production of these thermally conductive fibers have poor softness and high rigidity, and are difficult to process when splitting them to form the required thickness.

[0005] Some researchers have soaked nonwoven fabrics in cooling agents such as menthol, borneol, and lemon essential oil. While this enhances the cooling sensation, the cooling effect gradually diminishes over time. Therefore, further research is needed on nonwoven fabrics with a cooling sensation. Summary of the Invention

[0006] In order to obtain a nonwoven fabric with a cooling sensation and improve the durability of the cooling sensation, a nonwoven fabric with a cooling sensation and a method for preparing the same are provided.

[0007] In a first aspect, this application provides a method for preparing a nonwoven fabric with a cooling sensation, comprising the following steps:

[0008] 1): The island fibers are broken up, then stacked and needle-punched to obtain needle-punched fabric.

[0009] 2): Heat the needle-punched fabric to 100-130℃ and preheat for 1-5 minutes. Then pour a cooling and heat-dissipating treatment liquid at 50-60℃ onto one side of the needle-punched fabric. Apply pressure to allow the cooling and heat-dissipating treatment liquid to penetrate to the other side of the needle-punched fabric. Immerse for 10-20 minutes, squeeze, and dry to a humidity of 40-69% to obtain a cooling and heat-dissipating fabric.

[0010] 3): The heat-dissipating and cooling cloth is immersed in the resin solution for impregnation treatment. It is heated to 80℃-120℃ and dried for 1-10 minutes to obtain the resin-impregnated cloth.

[0011] 4): Cut the impregnated cloth into pieces and flatten them to obtain a nonwoven fabric with a cooling sensation.

[0012] This application boasts high production efficiency and simple operation. The needle-punched fabric is treated with a heat-dissipating and cooling agent, allowing the agent to fully penetrate the interior of the nonwoven fabric. By preheating the needle-punched fabric before immersion, the air inside the fabric expands due to its small pores, increasing the pore size and creating a slightly fluffy structure. At this point, the heat-dissipating and cooling liquid is poured onto the fabric, allowing the molecules to easily penetrate the interior of the needle-punched fabric and completely saturate it.

[0013] The needle-punched fabric is immersed in a cooling liquid that coats both the inside and outside of the fabric. Because the cooling liquid is at a low temperature, the temperature of the needle-punched fabric decreases after it passes through. At this point, the pores shrink, locking in the cooling particles of the cooling liquid. This allows more cooling particles to adhere to the fibers of the needle-punched fabric.

[0014] Extrusion refers to the process where the impregnated needle-punched fabric passes through the gap between two extrusion rollers. The extrusion rollers squeeze the fabric, causing the cooling and heat-dissipating liquid trapped inside to be squeezed out. Only a portion of the cooling and heat-dissipating liquid remains and is bonded to the fibers of the needle-punched fabric. After initial curing, the cooling ions are adsorbed onto the fibers of the needle-punched fabric to form a cooling and heat-dissipating film. During the subsequent impregnation process, the impregnation liquid also penetrates the interior and forms a coating film on the cooling and heat-dissipating film.

[0015] The above treatments, including the coating film, can reduce the rapid evaporation of cooling particles from the cooling heat dissipation film, or protect the film, thereby improving the durability of the nonwoven fabric's cooling effect. Furthermore, after slicing and smoothing, the impregnated fabric has a soft, smooth feel and is wear-resistant.

[0016] Preferably, the impregnation solution is composed of the following raw materials in parts by weight:

[0017] 5-10 parts water

[0018] 1-3 parts of cooling agent

[0019] 5-10 parts of impregnating agent

[0020] Ammonium persulfate 0.3-0.8 parts

[0021] 10-20 parts of water-based acrylic emulsion

[0022] 10-25 parts of waterborne polyurethane emulsion.

[0023] By mixing waterborne acrylic emulsion and waterborne polyurethane emulsion, good adhesion is achieved. Water acts as a diluent, and the impregnating agent promotes the penetration of the impregnating solution into the heat-dissipating and cooling fabric, as well as film formation, thus forming a stable coating film. The added cooling agent gives the impregnating solution a certain cooling feel; the amount of cooling agent used in this application does not affect the adhesion or film-forming effect of the impregnating solution. It also further enhances the cooling feel of the nonwoven fabric, providing better comfort when used in summer.

[0024] Preferably, the heat dissipation and cooling treatment liquid is composed of the following raw materials in parts by weight:

[0025] Cooling agent 1-10 parts

[0026] Cooling heat dissipation agent 2-8 parts

[0027] 20-50 parts of impregnating agent.

[0028] Preferably, the preparation of the impregnation solution includes the following steps:

[0029] Weigh out 5-10 parts water, 1-3 parts cooling agent, 5-10 parts impregnating agent, 0.3-0.8 parts ammonium persulfate, 10-20 parts waterborne acrylic emulsion, and 10-25 parts waterborne polyurethane emulsion according to the weight ratio, mix them, and stir at 60-120 min for 15-30 min to obtain the impregnation solution.

[0030] Preferably, the preparation of the heat dissipation and cooling treatment liquid includes the following steps:

[0031] Weigh out 1-10 parts of cooling agent, 2-8 parts of cooling heat dissipation agent, and 20-50 parts of penetrant by weight, mix them evenly, and obtain a heat dissipation and cooling treatment liquid.

[0032] The above-mentioned raw material dosage range is the preferred choice for this application. Among them, the impregnating agent can not only improve the dispersibility of the cooling agent and the cooling heat dissipation agent, but also adsorb them onto the fibers of the needle-punched fabric to form a cooling heat dissipation film, so that the obtained non-woven fabric has a good cooling and heat dissipation effect, while not having an excessive impact on the softness, wear resistance, etc. of the non-woven fabric.

[0033] Preferably, the impregnating agent and the heat dissipation and cooling treatment liquid in the impregnation solution are both composed of the following raw materials in parts by weight:

[0034] 2-5 parts of γ-glycidyl oxypropyltrimethoxysilane

[0035] 0.1-0.8 parts of polyether-modified heptamethyltrisiloxane

[0036] 1-3 parts of polypropylene glycol diglycidyl ether

[0037] 5-10 parts of anhydrous ethanol

[0038] 22-35 parts water.

[0039] Preferably, the impregnating agent is obtained by the following method:

[0040] Weigh out 2-5 parts of γ-glycidyl etheroxypropyltrimethoxysilane, 0.1-0.8 parts of polyether-modified heptamethyltrisiloxane, 1-3 parts of polypropylene glycol diglycidyl ether, 5-10 parts of anhydrous ethanol, and 22-35 parts of water by weight, and mix them evenly to obtain the impregnating agent.

[0041] By combining γ-glycidyl etheroxypropyltrimethoxysilane, polyether-modified heptamethyltrisiloxane, and polypropylene glycol diglycidyl ether, and diluting with anhydrous ethanol and water, a penetrant is formed that possesses excellent adhesion, film-forming properties, dispersibility, and surface activity. Therefore, when used in penetrants or cooling treatment solutions, it promotes penetration into the interior of the nonwoven fabric, facilitates film formation, and also improves the dispersibility of cooling and heat-dissipating agents, or promotes their stable adhesion to the fibers of needle-punched fabric. Thus, the resulting nonwoven fabric not only has a good cooling sensation but also excellent abrasion resistance and softness. Even after multiple washes, the nonwoven fabric retains its good cooling sensation.

[0042] Preferably, the cooling agent in the impregnation solution and the cooling agent in the heat dissipation and cooling treatment solution are one or more of peppermint powder, lemon powder, and mugwort powder.

[0043] Cooling agents composed of one or more of peppermint powder, lemon powder, and mugwort powder have a good cooling feel, and the powder is easy to disperse in the impregnation solution or heat dissipation cooling treatment solution, thus giving the obtained nonwoven fabric a good cooling feel.

[0044] Preferably, the cooling heat dissipation agent is obtained by mixing nano diamond powder, nano jade powder, and nano boron nitride in a weight ratio of (1-3):(0.1-0.5):1.

[0045] Nano-diamond powder is obtained by crushing and grinding diamond, and has good thermal conductivity, while also having a cool touch. Nano-jade powder is produced by grinding jade, and has a good cool touch and good thermal conductivity. Similarly, nano-boron nitride has good thermal conductivity and also has a certain cool touch. Therefore, when nano-diamond powder, nano-jade powder, and nano-boron nitride are used in a composite ratio of (1-3):(0.1-0.5):1, the thermal conductivity is good and the cool touch is excellent.

[0046] Furthermore, the nanodiamond powder, nanojade powder, and nanoboron nitride of this application all have a particle size of 50-200 nm. Using this particle size range facilitates dispersion and adhesion to needle-punched fabric fibers, while having minimal impact on the softness and abrasion resistance of the nonwoven fabric.

[0047] Secondly, this application provides a nonwoven fabric with a cooling sensation and a thickness of 0.1-30mm.

[0048] In summary, this application has the following beneficial effects:

[0049] 1. By sequentially treating the needle-punched fabric with a heat-conducting and cooling liquid and then with an adhesive solution to form a coating film, the cooling particles of the cooling heat dissipation film can be reduced from evaporating too quickly, or the cooling heat dissipation film can be protected to improve the durability of the cooling effect of the nonwoven fabric.

[0050] 2. By combining γ-glycidyl etheroxypropyltrimethoxysilane, polyether-modified heptamethyltrisiloxane, and polypropylene glycol diglycidyl ether, and diluting with anhydrous ethanol and water, the resulting impregnating agent possesses excellent adhesion, film-forming properties, dispersibility, and surface activity. Therefore, when used in impregnating agents or cooling treatment solutions, it promotes penetration into the interior of the nonwoven fabric and facilitates film formation. It also improves the dispersibility of cooling and heat-dissipating agents, or promotes their stable adhesion to the fibers of needle-punched fabric. Thus, the resulting nonwoven fabric not only has a good cooling sensation but also excellent abrasion resistance and softness. Detailed Implementation

[0051] The present application will be further described in detail below with reference to the embodiments.

[0052] The waterborne acrylic emulsion is a flexible acrylic emulsion. Its monomers are mainly composed of polyethylene glycol diacrylate (of which the molecular weight of polyethylene glycol is 200), lauric acid acrylate, and itaconic acid. The viscosity at 25°C is 1500-2000 CPS, the solid content is 46-50%, and the average molecular weight of its polymer is 1000-2000.

[0053] The waterborne polyurethane emulsion is manufactured by Hefei Huayue New Material Technology Co., Ltd., model number 1000C, with a solid content of 50%.

[0054] Polyether-modified heptamethyltrisiloxane, preferably manufactured by Hubei Watson Chemical Technology Co., Ltd., with a surface tension (0.1%) It of 20.5 mN / m and a viscosity (25℃, mm² / s) of 20-50.

[0055] Polypropylene glycol diglycidyl ether, preferably manufactured by Jiangsu Leien Environmental Protection Technology Co., Ltd., has an epoxy value of 0.56-0.67, a viscosity of 20-30 mPa·s at 25℃, and an epoxy equivalent of 149-178 g / eq.

[0056] The preferred manufacturer of island fiber is Linyi Dazheng Special Fiber New Material Co., Ltd., with the product name being alkali reduction 37 island white nylon island staple fiber, and the specification being 3.5D*51mm.

[0057] Preparation example of impregnating agent

[0058] Preparation Example 1

[0059] An impregnating agent is obtained by the following method:

[0060] Weigh 2 kg of γ-glycidyl etheroxypropyltrimethoxysilane, 0.1 kg of polyether-modified heptamethyltrisiloxane, 1 kg of polypropylene glycol diglycidyl ether, 10 kg of anhydrous ethanol, and 22 kg of water and put them into a mixing tank. Stir the mixture using a stirrer at a speed of 60 r / min for 20 min to obtain the impregnating agent.

[0061] Preparation Example 2

[0062] An impregnating agent is obtained by the following method:

[0063] Weigh out 3 kg of γ-glycidyl etheroxypropyltrimethoxysilane, 0.5 kg of polyether-modified heptamethyltrisiloxane, 2 kg of polypropylene glycol diglycidyl ether, 7 kg of anhydrous ethanol, and 28 kg of water and put them into a mixing tank. Stir the mixture using a stirrer at a speed of 60 r / min for 20 min to obtain the impregnating agent.

[0064] Preparation Example 3

[0065] An impregnating agent is obtained by the following method:

[0066] Weigh out 5 kg of γ-glycidyl etheroxypropyltrimethoxysilane, 0.8 kg of polyether-modified heptamethyltrisiloxane, 3 kg of polypropylene glycol diglycidyl ether, 5 kg of anhydrous ethanol, and 35 kg of water and put them into a mixing tank. Stir the mixture using a stirrer at a speed of 60 r / min for 20 min to obtain the impregnating agent.

[0067] Example of preparation of heat dissipation and cooling treatment fluid

[0068] Preparation Example 4

[0069] A cooling and heat-dissipating liquid is obtained by the following method:

[0070] Peppermint powder and mugwort powder were weighed in a 1:1 ratio and mixed together. The mixture was then ground in a grinder and sieved through a 500-mesh sieve to obtain a cooling agent.

[0071] Nano diamond powder, nano jade powder, and nano boron nitride are mixed evenly in a weight ratio (kg) of 1:0.1:1 to obtain a cooling heat dissipation agent.

[0072] Weigh 1 kg of cooling agent, 8 kg of cooling heat dissipation agent, and 50 kg of the penetrant obtained in Preparation Example 1 and put them into a mixing tank. Stir the mixture using a stirrer at a speed of 60 r / min for 20 min to obtain a heat dissipation and cooling treatment liquid.

[0073] Preparation Example 5

[0074] A cooling and heat-dissipating liquid is obtained by the following method:

[0075] Peppermint powder and mugwort powder were weighed in a 1:1 ratio and mixed together. The mixture was then ground in a grinder and sieved through a 500-mesh sieve to obtain a cooling agent.

[0076] Nano diamond powder, nano jade powder, and nano boron nitride are mixed evenly in a weight ratio (kg) of 2:0.3:1 to obtain a cooling heat dissipation agent.

[0077] Weigh 5 kg of cooling agent, 5 kg of cooling heat dissipation agent, and 40 kg of the penetrant obtained in Preparation Example 2 and put them into a mixing tank. Stir with a stirrer at a speed of 60 r / min for 20 min to obtain a heat dissipation and cooling treatment liquid.

[0078] Preparation Example 6

[0079] A cooling and heat-dissipating liquid is obtained by the following method:

[0080] Peppermint powder, mugwort powder, and lemon powder were weighed in a ratio of 1:1:1 and mixed together. The mixture was then ground in a grinder and sieved through a 500-mesh sieve to obtain a cooling agent.

[0081] Nano diamond powder, nano jade powder, and nano boron nitride are mixed evenly in a weight ratio (kg) of 3:0.5:1 to obtain a cooling heat dissipation agent.

[0082] Weigh 10 kg of cooling agent, 2 kg of cooling heat dissipation agent, and 20 kg of the penetrant obtained in Preparation Example 3 and put them into a mixing tank. Stir with a stirrer at a speed of 60 r / min for 20 min to obtain a heat dissipation and cooling treatment liquid.

[0083] Preparation of comparative examples

[0084] Preparation of Comparative Example 1

[0085] The difference between Comparative Example 1 and Preparation Example 4 is that the cooling heat dissipation agent is nano-diamond powder.

[0086] Preparation example of impregnation solution

[0087] Preparation Example 7

[0088] An impregnation solution is prepared by the following method:

[0089] Peppermint powder and mugwort powder were weighed in a 1:1 ratio and mixed together. The mixture was then ground in a grinder and sieved through a 500-mesh sieve to obtain a cooling agent.

[0090] Weigh out 5 kg of water, 1 kg of cooling agent, 5 kg of impregnating agent from Preparation Example 1, 0.3 kg of ammonium persulfate, 10 kg of waterborne acrylic emulsion, and 25 kg of waterborne polyurethane emulsion and put them into a mixing tank. Stir the mixture for 30 minutes at 80 rpm to obtain the impregnation solution.

[0091] Preparation Example 8

[0092] An impregnation solution is prepared by the following method:

[0093] Peppermint powder and mugwort powder were weighed in a 1:1 ratio and mixed together. The mixture was then ground in a grinder and sieved through a 500-mesh sieve to obtain a cooling agent.

[0094] Weigh out 8 kg of water, 2 kg of cooling agent, 8 kg of impregnating agent from Preparation Example 2, 0.5 kg of ammonium persulfate, 15 kg of waterborne acrylic emulsion, and 20 kg of waterborne polyurethane emulsion and put them into a mixing tank. Stir the mixture for 30 minutes at 80 rpm to obtain the impregnation solution.

[0095] Preparation Example 9

[0096] An impregnation solution is prepared by the following method:

[0097] Peppermint powder and mugwort powder were weighed in a 1:1 ratio and mixed together. The mixture was then ground in a grinder and sieved through a 500-mesh sieve to obtain a cooling agent.

[0098] Weigh 10 kg of water, 3 kg of cooling agent, 10 kg of impregnating agent (Preparation Example 3), 0.8 kg of ammonium persulfate, 20 kg of waterborne acrylic emulsion, and 10 kg of waterborne polyurethane emulsion and put them into a mixing tank. Stir the mixture for 30 minutes at 80 rpm to obtain the impregnation solution.

[0099] Preparation of comparative examples

[0100] Preparation of Comparative Example 2

[0101] The difference between Comparative Example 2 and Example 7 is that the cooling agent was replaced with an equal amount of water.

[0102] Preparation of Comparative Example 3

[0103] The difference between Comparative Example 3 and Preparation Example 7 is that the impregnating agent was replaced with an equal amount of water.

[0104] Preparation of Comparative Example 4

[0105] The difference between Comparative Example 4 and Example 7 is that the cooling agent was replaced with an equal amount of cooling heat dissipation agent; the cooling heat dissipation agent is composed of nano diamond powder, nano jade powder and nano boron nitride in a weight (kg) ratio of 2:0.3:1.

[0106] Preparation of Comparative Example 5

[0107] The difference between Comparative Example 5 and Example 7 is that the amount of cooling agent used is 10 kg.

[0108] Example

[0109] Example 1

[0110] A nonwoven fabric with a cooling sensation and a thickness of 3mm.

[0111] This cooling nonwoven fabric is obtained by the following method:

[0112] 1): The island fibers are placed in a cotton box and broken up. Then, the broken island fibers are stacked by a stacking device, and then fed to a needle punching device for needle punching. Finally, the fibers are wound up by a winding mechanism to obtain needle-punched fabric.

[0113] 2): The needle-punched fabric is conveyed to the heating device and preheated at 100°C for 1 minute. Then it is conveyed to a tank containing the heat dissipation and cooling treatment liquid obtained in Preparation Example 4 at 50°C, and the needle-punched fabric is completely immersed for 10 minutes. Then it is conveyed to the extrusion mechanism for extrusion. After extrusion, the heat dissipation and cooling treatment liquid trapped inside the needle-punched fabric is squeezed out, while some of the liquid adhering to the needle-punched fabric fibers is not squeezed out. Then it is conveyed to the drying mechanism and dried to a humidity of 55% to obtain the heat dissipation and cooling fabric.

[0114] 3): The heat dissipation and cooling cloth is then conveyed to the impregnation solution obtained in Preparation Example 7, and the heat dissipation and cooling cloth is completely immersed for 5 minutes. Then it is conveyed to the extrusion mechanism for extrusion. After extrusion, the impregnation solution trapped inside the heat dissipation and cooling cloth slides out. Then it is conveyed to the drying mechanism, heated to 100°C, and dried for 10 minutes to obtain the impregnated cloth.

[0115] 4): The impregnated fabric is placed in a slitting device for slitting, then placed in a leveling machine and hot-pressed with two rollers at 150℃ to flatten the surface, resulting in a sheet with a basis weight of 300g / m². 2 Non-woven fabric with a cooling sensation.

[0116] Example 2

[0117] The difference between Example 2 and Example 1 is that the cooling and heat-dissipating treatment liquid obtained in Preparation Example 5 was used; and the impregnation liquid obtained in Preparation Example 8 was used.

[0118] Example 3

[0119] The difference between Example 3 and Example 1 is that the cooling and heat-dissipating treatment liquid obtained in Preparation Example 6 was used; and the impregnation liquid obtained in Preparation Example 9 was used.

[0120] Example 4

[0121] The difference between Example 4 and Example 1 is that the cooling and heat-dissipating treatment liquid of Comparative Example 1 was used.

[0122] Comparative Example

[0123] Comparative Example 1

[0124] The difference between Comparative Example 1 and Example 1 is that step 2 is omitted. The specific process is as follows:

[0125] 1): The island fibers are placed in a cotton box and broken up. Then, the broken island fibers are stacked by a stacking device and fed to a needle punching device for needle punching. Finally, the fibers are wound up by a winding mechanism to obtain needle-punched fabric.

[0126] 2): The needle-punched fabric is then conveyed to the impregnation solution obtained in Preparation Example 7, and the needle-punched fabric is completely immersed for 15 minutes. It is then conveyed to the extrusion mechanism for extrusion. After extrusion, the impregnation solution trapped inside the needle-punched fabric slides out. It is then conveyed to the drying mechanism, heated to 100°C, and dried for 10 minutes to obtain the impregnated fabric.

[0127] 3): The impregnated fabric is placed in a slitting device for slitting, and then placed in a leveling machine. It is then hot-pressed with two rollers at a temperature of 150℃ to flatten the surface and obtain a nonwoven fabric with a cool feel.

[0128] Comparative Example 2

[0129] The difference between Comparative Example 2 and Example 1 is that the impregnation solution obtained in Comparative Example 2 was used.

[0130] Comparative Example 3

[0131] The difference between Comparative Example 3 and Example 1 is that the impregnation solution obtained in Comparative Example 3 was used.

[0132] Comparative Example 4

[0133] The difference between Comparative Example 4 and Example 1 is that the impregnation solution obtained in Comparative Example 4 was used.

[0134] Comparative Example 5

[0135] The difference between Comparative Example 5 and Example 1 is that the impregnation solution obtained in Comparative Example 5 was used.

[0136] Comparative Example 6

[0137] The difference between Comparative Example 6 and Example 1 is that step 3 is omitted, as follows:

[0138] 1): The island fibers are placed in a cotton box and broken up. Then, the broken island fibers are stacked by a stacking device and fed to a needle punching device for needle punching. Finally, the fibers are wound up by a winding mechanism to obtain needle-punched fabric.

[0139] 2): The needle-punched fabric is conveyed to the heating device and preheated at 100°C for 1 minute. Then it is conveyed to a tank containing the heat dissipation and cooling treatment liquid obtained in Preparation Example 4 at 50°C, so that the needle-punched fabric is completely immersed for 15 minutes. Then it is conveyed to the extrusion mechanism for extrusion. After extrusion, the heat dissipation and cooling treatment liquid trapped inside the needle-punched fabric is squeezed out, while some of the liquid adhering to the needle-punched fabric fibers is not squeezed out. Then it is conveyed to the drying mechanism, heated to 100°C, and dried for 15 minutes to obtain the impregnated fabric.

[0140] 3): The impregnated fabric is placed in a slitting device for slitting, and then placed in a leveling machine. It is then hot-pressed with two rollers at a temperature of 150℃ to flatten the surface and obtain a nonwoven fabric with a cool feel.

[0141] Performance testing

[0142] Detection methods / test methods

[0143] Cooling sensation upon contact

[0144] The instantaneous cooling sensation upon contact was tested according to GB / T35263-2017.

[0145] Test 1: The non-woven fabrics with a cooling sensation obtained from Examples 1-4 and Comparative Examples 1-6 were tested for the instantaneous cooling sensation upon contact, with ΔT = 15℃; each test item was tested 5 times and the average value was taken.

[0146] Test 2: The non-woven fabrics with a cooling sensation obtained from Examples 1-4 and Comparative Examples 1-6 were washed 50 times with water, and the cooling sensation upon contact was then tested. Each test item was tested 5 times, and the average value was taken. The specific data are shown in Table 1.

[0147] thermal conductivity

[0148] The thermal conductivity of the nonwoven fabrics with a cooling sensation obtained in Examples 1-4 and Comparative Examples 1-6 was tested in accordance with the national standard GB / T10294-2008. Each test was conducted three times, and the average value was taken. The specific data are shown in Table 1.

[0149] abrasion resistance

[0150] Abrasion resistance was tested according to GB / T 21196.2-2007 Textiles - Martindale Method for Determination of Abrasion Resistance of Fabrics. The mass loss after abrasion was measured, where the mass before abrasion was recorded as B1 and the mass after abrasion was recorded as B2. The mass loss rate was calculated as [(B1-B2 / B1)] × 100%. The higher the mass loss rate, the worse the abrasion resistance. Each test was performed three times, and the average value was taken. The specific data are shown in Table 1.

[0151] Table 1. Experimental data of Examples 1-4 and Comparative Examples 1-6

[0152]

[0153] Based on Example 1 and Comparative Example 1 and Table 1, it can be seen that the instantaneous cooling sensation value and thermal conductivity in Test 1 of Comparative Example 1 are smaller than those in Example 1. Furthermore, after 50 water-based tests, the instantaneous cooling sensation value decreases more significantly than that in Example 1. Therefore, it is evident that the nonwoven fabric obtained through the production process of this application has a better cooling sensation and better cooling sensation retention.

[0154] Combining Example 1 and Comparative Example 2 with Table 1, it can be seen that the instantaneous cooling value in Test 1 of Comparative Example 2 is smaller than that of Example 1, indicating that the nonwoven fabric has poor cooling sensation when no cooling agent is added.

[0155] Based on Example 1 and Comparative Examples 3-5 and Table 1, it can be seen that the cooling sensation of Comparative Examples 3-4 decreased significantly upon contact, indicating that the impregnation solution composed of the raw materials of this application has good adhesion. Therefore, after washing with water, the cooling agent and other substances are not easily lost.

[0156] As can be seen from Table 1, which combines Example 1 and Comparative Examples 3-6, the instantaneous cooling sensation of Comparative Example 6 is significantly reduced. This indicates that when two layers of film are not used for coating, the cooling agent is easily lost during washing, thereby reducing the durability of the cooling sensation of the nonwoven fabric.

[0157] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A method for producing a nonwoven fabric having a cool feeling, characterized by comprising the steps of: The method comprises the following steps: ​ 1) disperse the island fibers, then stack and needle punch to obtain a needle punched fabric; 2) heat the needle punched fabric to 100-130℃, preheat for 1-5 min, then transfer to a heat dissipation and cool feeling treatment liquid at 50-60℃, immerse for 10-20 min, extrude, and dry to a humidity of 40-69% to obtain a heat dissipation and cool feeling fabric; 3) transfer the heat dissipation and cool feeling fabric to an impregnation liquid, perform impregnation treatment, heat to 80-120℃, and dry for 1-10 min to obtain an impregnated fabric; 4) cut and flatten the impregnated fabric to obtain a non-woven fabric with cool feeling. The impregnation liquid is composed of the following raw materials by weight: water 5-10 parts cooling agent 1-3 parts impregnation agent 5-10 parts ammonium persulfate 0.3-0.8 parts water-based acrylic emulsion 10-20 parts water-based polyurethane emulsion 10-25 parts The heat dissipation and cool feeling treatment liquid is composed of the following raw materials by weight: cooling agent 1-10 parts cooling and heat dissipation agent 2-8 parts impregnation agent 20-50 parts The impregnation agent in the impregnation liquid and the impregnation agent in the heat dissipation and cool feeling treatment liquid are both composed of the following raw materials by weight: γ-glycidyl ether oxypropyl trimethoxysilane 2-5 parts polyether modified heptamethyltrisiloxane 0.1-0.8 parts polypropylene glycol diglycidyl ether 1-3 parts anhydrous ethanol 5-10 parts water 22-35 parts The cooling agent in the impregnation liquid and the cooling agent in the heat dissipation and cool feeling treatment liquid are both one or more of peppermint powder, lemon powder, and wormwood powder; The cooling and heat dissipation agent is a mixture of nano diamond powder, nano jade powder, and nano boron nitride in a weight ratio of (1-3):(0.1-0.5):

1.

2. The method of producing a nonwoven fabric having a cool feeling according to claim 1, characterized by, The preparation of the impregnation liquid comprises the following steps: According to the weight parts, weigh water 5-10 parts, cooling agent 1-3 parts, impregnation agent 5-10 parts, ammonium persulfate 0.3-0.8 parts, water-based acrylic emulsion 10-20 parts, and water-based polyurethane emulsion 10-25 parts, mix, and stir at a speed of 60-120 min for 15-30 min to obtain the impregnation liquid.

3. The method for preparing a nonwoven fabric with a cooling sensation according to claim 1, characterized in that, The preparation of the heat dissipation and cool feeling treatment liquid comprises the following steps: According to the weight parts, weigh cooling agent 1-10 parts, cooling and heat dissipation agent 2-8 parts, and impregnation agent 20-50 parts, mix evenly to obtain the heat dissipation and cool feeling treatment liquid.

4. The method for preparing a nonwoven fabric with a cooling sensation according to claim 1, characterized in that, The impregnation agent is obtained by the following method: According to the weight parts, weigh γ-glycidyl ether oxypropyl trimethoxysilane 2-5 parts, polyether modified heptamethyltrisiloxane 0.1-0.8parts, polypropylene glycol diglycidyl ether 1-3 parts, anhydrous ethanol 5-10 parts, and water 22-35 parts, mix evenly to obtain the impregnation agent.

5. A nonwoven fabric having a cool feeling, characterized by comprising a fiber having a hollow portion. The non-woven fabric is obtained by the method for preparing a non-woven fabric with cool feeling according to any one of claims 1-4, and has a thickness of 0.1-30 mm.

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