A kind of wool fiber quilt core material and preparation method thereof

Abstract

The invention discloses a wool fiber quilt core material and a preparation method thereof. The invention comprises the following steps: regenerated cellulose fiber and polylactic acid fiber are respectively soaked in an alkaline solution and ultrasonically treated, and then soaked in a cationic antibacterial agent solution containing titanium dioxide; the wool fiber is soaked in a silicon dioxide dispersion; the treated wool fiber, regenerated cellulose fiber and polylactic acid fiber are combed and laid on a net to prepare the wool fiber quilt core material; titanium dioxide can promote the bonding between fibers while producing an antibacterial effect during photocatalysis; there is an electrostatic adsorption effect between silicon dioxide and silicon dioxide, and between the cationic antibacterial agent and silicon dioxide; the electrostatic adsorption effect can ensure the dense structure of the quilt core material and the material has warmth retention; at the same time, the silicon dioxide on the fiber and the silicon dioxide, and between the cationic antibacterial agent and silicon dioxide play a synergistic antibacterial role, thereby solving the defects of the wool quilt core material in the prior art that the warmth retention effect is poor and odor is produced after long-term use.

Description

Technical Field

[0001] The invention relates to the technical field of textile material modification, in particular to the technical field of fiber processing, and in particular to a wool fiber quilt core material and a preparation method thereof. Background Art

[0002] Quilt core is a bedding product mainly used for warmth, which is made of quilt cover and filling material sewn in an appropriate way. As consumers pay more attention to the quality and sustainability of textiles, the quilt core material industry is also constantly innovating in technology and developing green development. There are many types of quilt core material products, including down quilts, wool quilts, cotton quilts, chemical fiber quilts, etc. The design concept of the products has also gradually evolved from simple warmth to comfort.

[0003] As the years of use increase, wool fibers will gradually age and easily absorb moisture during use. Long-term accumulation will cause the wool quilt core material to become hard and hard, thereby reducing the warmth retention effect. Wool itself contains oil and protein, which becomes a breeding ground for bacteria. After long-term use, the wool will deteriorate and bacteria will multiply, causing odor and making people feel uncomfortable.

[0004] Therefore, it is necessary to improve the preparation method of the quilt core material in the prior art to solve the above problems. Summary of the invention

[0005] The present invention overcomes the deficiencies of the prior art and provides a wool fiber quilt core material and a preparation method thereof, aiming to solve the defects of the prior art wool quilt core material in that the warming effect deteriorates and odor is generated after long-term use.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a method for preparing a wool fiber quilt core material, comprising the following steps:

[0007] S1: soaking the regenerated cellulose fiber in an alkaline solution and subjecting the polylactic acid fiber to ultrasonic treatment to obtain pretreated regenerated cellulose fiber and pretreated polylactic acid fiber respectively;

[0008] S2: preparing a cationic antibacterial agent solution by nano-titanium dioxide particles and a cationic antibacterial agent, and using the cationic antibacterial agent solution to atomize and spray the pretreated regenerated cellulose fibers and the pretreated polylactic acid fibers in S1 for 1-2 hours, and drying to obtain modified regenerated cellulose fibers and modified polylactic acid fibers, respectively;

[0009] S3: preparing a silica dispersion from nano-silicon dioxide powder, wherein the silica dispersion contains sodium dodecyl sulfate, soaking wool fibers in the silica dispersion for 3-4 hours, taking out and drying to obtain modified wool fibers;

[0010] S4: combing and web-laying the modified regenerated cellulose fiber, the modified polylactic acid fiber and the modified wool fiber in S2, and then shaping them to obtain a wool fiber quilt core material, wherein the mass content of the modified polylactic acid fiber in the wool fiber quilt core material is greater than 5%.

[0011] In a preferred embodiment of the present invention, the alkaline solution in S1 is a sodium hydroxide solution with a concentration of 3%, the immersion time is 1-2 hours, the ultrasonic treatment frequency is 40-60kHz, and the ultrasonic treatment time is 30-60min.

[0012] In a preferred embodiment of the present invention, the fineness of the regenerated cellulose fiber and the polylactic acid fiber in S1 is 3-5D and 6-8D respectively, and the regenerated cellulose fiber is one of lyocell fiber, viscose fiber and modal fiber.

[0013] In a preferred embodiment of the present invention, the cationic antibacterial agent in the cationic antibacterial agent solution in S2 is one of silver nitrate or polyhexamethylene biguanide, the concentration of the cationic antibacterial agent is 5-10%, the particle size of the nano titanium dioxide particles is 500-700nm, the concentration of the nano titanium dioxide particles is 3-5%, the drying temperature is 80-100°C, and the drying time is 0.5-1h.

[0014] In a preferred embodiment of the present invention, the particle size of the nano-silicon dioxide powder in S3 is 100-200 nm, the concentration of the silicon dioxide dispersion is 3-5%, and the solvent of the silicon dioxide dispersion is acetone.

[0015] In a preferred embodiment of the present invention, the wool fibers in S3 include fine wool and coarse wool, the diameter of the fine wool is 18-24 μm, the diameter of the coarse wool is 45-55 μm, and the length of the wool fibers is 40-120 mm.

[0016] In a preferred embodiment of the present invention, the concentration of the sodium dodecyl sulfate in S3 is 0.3-0.5%, the pH of the silicon dioxide dispersion is 7.5-8.5, and the mass ratio of the fine hair to the coarse hair in the wool fiber is 2:8-4:6.

[0017] In a preferred embodiment of the present invention, the mass ratio of the modified regenerated cellulose fiber, the modified polylactic acid fiber and the modified wool fiber in S4 is 50-85:5-40:5-40.

[0018] In a preferred embodiment of the present invention, the S4 laying method is one of: laying the modified regenerated cellulose fiber, the modified polylactic acid fiber and the modified wool fiber after being evenly mixed, and laying them in layers respectively, the carding speed is 10-30m / min, the setting temperature is 100-120℃, and the setting time is 10-15min.

[0019] In order to achieve the above-mentioned purpose, the second set of technical solutions adopted by the present invention is: a wool fiber quilt core material, which is prepared based on a method for preparing a wool fiber quilt core material.

[0020] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0021] (1) The present invention provides a method for preparing a wool fiber quilt core material, comprising: soaking regenerated cellulose fiber and polylactic acid fiber in an alkaline solution and ultrasonically treating them respectively, and then soaking them in a cationic antibacterial agent solution containing nano titanium dioxide; soaking the wool fiber in a silica dispersion; combing and laying the treated wool fiber, regenerated cellulose fiber and polylactic acid fiber to make a wool fiber quilt core material; titanium dioxide can promote the bonding between fibers while producing an antibacterial effect under photocatalysis; there is an electrostatic adsorption effect between silica and silica, and between the cationic antibacterial agent and silica; compared with the preparation method of the wool fiber quilt core material in the prior art, the electrostatic adsorption effect can ensure the dense structure of the quilt core material and the warmth retention; at the same time, the silica and silica on the fibers, and the cationic antibacterial agent and silica play a synergistic antibacterial role, thereby solving the defects of the wool quilt core material in the prior art that the warmth retention effect deteriorates and odor is generated after long-term use.

[0022] (2) The wool fibers in the present invention include fine wool and coarse wool. The diameter of the fine wool is 18-24 μm, the diameter of the coarse wool is 45-55 μm, and the length of the wool fiber is 40-120 mm. The diameter of the fine wool is smaller, which can form a tighter fiber arrangement and reduce the gaps between the fibers. The fiber structure of the coarse wool is relatively loose, which helps to increase the air permeability of the quilt core material. Compared with the prior art, it can improve the thermal insulation performance of the quilt core material while improving the antibacterial ability of the quilt core material.

[0023] (3) In the present invention, regenerated cellulose fiber and polylactic acid fiber are selected and loaded with cationic antibacterial agents respectively. Regenerated cellulose has surface activity and hydrophilicity, and polylactic acid has solubility and permeability. Compared with the prior art, regenerated cellulose can enhance the contact between the cationic antibacterial agent and the bacterial cell membrane, and can destroy the cell membrane to achieve the antibacterial effect. Polylactic acid fiber can enhance the contact between the cationic antibacterial agent and the bacterial cell wall, and can produce different antibacterial mechanisms to improve the antibacterial effect.

[0024] (4) In the present invention, titanium dioxide is attached to the regenerated cellulose fibers and the polylactic acid fibers. Titanium dioxide increases the strength of the regenerated cellulose fibers and the polylactic acid fibers, reduces fiber breakage and degradation caused by friction during use, and compared with the prior art, can maintain the mechanical strength of the regenerated cellulose fibers and the polylactic acid fibers, so that the regenerated cellulose fibers, the polylactic acid fibers and the wool fibers form a stable and dense structure, which can improve the durability of the warmth retention ability.

[0025] (5) In the present invention, by arranging titanium dioxide and silicon dioxide on different types of fibers respectively, the electrostatic adsorption effect can maintain the stability of the cationic antibacterial agent and titanium dioxide, and the static electricity generated between the wool and the polylactic acid fiber can cause the internal fibers of the quilt material to open and close by affecting the electrostatic adsorption effect. Compared with the existing technology, it can improve the air permeability while ensuring the antibacterial stability, thereby reducing the survival and reproduction of bacteria and improving the antibacterial ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a method step diagram of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0030] like Figure 1 As shown, a method for preparing a wool fiber quilt core material comprises the following steps:

[0031] S1: soaking the regenerated cellulose fiber in an alkaline solution and subjecting the polylactic acid fiber to ultrasonic treatment to obtain pretreated regenerated cellulose fiber and pretreated polylactic acid fiber respectively;

[0032] S2: Prepare a cationic antibacterial solution from nano-titanium dioxide particles and a cationic antibacterial agent, and use the cationic antibacterial solution to atomize and spray the pretreated regenerated cellulose fibers and pretreated polylactic acid fibers in S1 for 1-2 hours, and obtain modified regenerated cellulose fibers and modified polylactic acid fibers after drying, respectively; compressed air atomization is used as the atomization spraying method. Compressed air atomization refers to a method of converting a liquid into tiny particulate floating matter or mist particles by compressed air. The principle is to use a high-speed airflow to impact the treated liquid into tiny particles, and disperse them in the gas phase to form a state between the gas phase and the liquid phase.

[0033] S3: Prepare nano-silica powder into a silica dispersion containing sodium dodecyl sulfate, soak wool fiber in the silica dispersion for 3-4 hours, take out and dry to obtain modified wool fiber; sodium dodecyl sulfate is an anionic surfactant, and its molecular structure contains an anionic part of sulfate. When sodium dodecyl sulfate is applied to the surface of silica as a surface treatment agent, its anionic part will be adsorbed on the surface of silica, so that the silica as a whole presents a negative charge. The positively charged modified regenerated cellulose fiber and modified polylactic acid fiber can produce electrostatic adsorption with negatively charged silica particles. Negatively charged silica has a large specific surface area and excellent adsorption capacity, which enables it to effectively adsorb modified regenerated cellulose fiber and modified polylactic acid fiber loaded with cationic antibacterial agents. The electrostatic adsorption between the positively charged fiber and the negatively charged silica particles can enhance the bonding force between the fibers and form a tighter fiber network structure, which helps to reduce heat loss and improve the warmth retention of the quilt core material. Electrostatic adsorption can increase the amount of still air in the quilt core material, because still air is a good thermal insulation material that can lock in temperature and reduce heat loss. Electrostatic adsorption can enhance the interaction between fibers, improve the overall structural stability of the quilt core material, reduce fiber breakage and deformation during use, and avoid a decrease in thermal insulation performance and the generation of odor.

[0034] Atomized spraying allows the antimicrobial agent to be evenly sprayed on the fiber surface in the form of tiny droplets, which can form a uniform coating on the fiber surface, which helps to increase the effective coverage area of ​​the antimicrobial agent and ensure the consistency of the antimicrobial effect. Atomized spraying can make the antimicrobial agent more firmly attached to the fiber, prolong the durability of the antimicrobial effect, and maintain a certain antimicrobial effect even after multiple washings.

[0035] The surface activity and hydrophilicity of regenerated cellulose can enhance the contact between cationic antimicrobial agents and bacterial cell membranes, and can destroy the cell membranes to achieve antibacterial effects. Polylactic acid loaded with cationic antimicrobial agents can interfere with the synthesis of bacterial cell walls to inhibit bacterial growth. The selection of regenerated cellulose fibers and polylactic acid fibers loaded with cationic antimicrobial agents can produce different antibacterial mechanisms and improve the antibacterial effect.

[0036] S4: The modified regenerated cellulose fiber, modified polylactic acid fiber and modified wool fiber in S2 are combed and laid into a web, and then shaped to obtain a wool fiber quilt core material, wherein the mass content of the modified polylactic acid fiber in the wool fiber quilt core material is greater than 5%.

[0037] The regenerated cellulose fiber and the polylactic acid fiber are respectively soaked in an alkaline solution and ultrasonically treated, and then soaked in a cationic antibacterial agent solution containing nano titanium dioxide. The wool fiber is soaked in a silicon dioxide dispersion. The treated wool fiber, regenerated cellulose fiber and polylactic acid fiber are combed and laid out to make a wool fiber quilt core material. Titanium dioxide can promote the bonding between fibers while producing an antibacterial effect under photocatalysis. There is an electrostatic adsorption effect between silicon dioxide and silicon dioxide, and between the cationic antibacterial agent and silicon dioxide. The electrostatic adsorption effect can ensure the dense structure of the quilt core material and the warmth retention. At the same time, the silicon dioxide and silicon dioxide on the fiber, and the cationic antibacterial agent and silicon dioxide have a synergistic antibacterial effect, thereby solving the defects of the wool quilt core material in the prior art that the warmth retention effect deteriorates and odor is generated after long-term use.

[0038] Titanium dioxide is attached to regenerated cellulose fibers and polylactic acid fibers. Titanium dioxide increases the strength of regenerated cellulose fibers and polylactic acid fibers, reduces fiber breakage and degradation caused by friction during use, and can maintain the mechanical strength of regenerated cellulose fibers and polylactic acid fibers. Regenerated cellulose fibers, polylactic acid fibers and wool fibers form a stable and dense structure, which can improve the durability of warmth retention.

[0039] By placing titanium dioxide and silicon dioxide on different types of fibers respectively, electrostatic adsorption can maintain the stability of cationic antibacterial agents and titanium dioxide, and the static electricity generated between wool and polylactic acid fibers can cause the fibers inside the quilt material to open and close by affecting the electrostatic adsorption effect, thereby improving air permeability while ensuring antibacterial stability, reducing the survival and reproduction of bacteria and improving antibacterial capabilities.

[0040] The alkaline solution in S1 is a 3% sodium hydroxide solution, the immersion time is 1-2h, the ultrasonic treatment frequency is 40-60kHz, and the ultrasonic treatment time is 30-60min. Immersion in sodium hydroxide solution can change the surface properties of the fiber and increase its hydrophilicity, which helps to form more hydrogen bonds between fibers and enhance warmth retention. Sodium hydroxide is a strong base that can chemically react with fibers to change their surface properties and increase hydrophilicity, thereby enhancing the interaction between fibers and improving warmth retention. Ultrasonic treatment uses the mechanical vibration and cavitation effect generated by high-frequency sound waves to further open the fiber structure and increase its surface area. After alkali treatment, the fiber bundle structure becomes loose, which is more conducive to the interaction between fibers, improving warmth retention and structural stability. Ultrasonic treatment can improve the hydrophilicity and cell compatibility of polylactic acid fibers while maintaining tensile properties, which is beneficial to the bonding between fibers.

[0041] The surface porosity and active sites of the alkali-treated regenerated cellulose fibers and the ultrasonic-treated polylactic acid fibers increase. Increasing the porosity helps to improve the warmth retention of the regenerated cellulose fibers and polylactic acid fibers because the porous structure can more effectively retain air and reduce heat loss, and the active sites can better combine with the antibacterial agent, making it more effective in killing bacteria.

[0042] The fineness of regenerated cellulose fiber and polylactic acid fiber in S1 is 3-5D and 6-8D respectively. Regenerated cellulose fiber is one of lyocell fiber, viscose fiber and modal fiber. Fibers with lower fineness are usually softer, which makes the quilt core material made of these fibers softer and more comfortable. Lyocell fiber, viscose fiber and modal fiber are all finer fibers, and they are very soft and skin-friendly. In addition to the above-mentioned fibers, regenerated cellulose fibers also include cuprammonium fiber, acetate fiber, soybean fiber, corn fiber, milk fiber, etc.

[0043] The cationic antibacterial agent in the cationic antibacterial agent solution in S2 is one of silver nitrate or polyhexamethylene biguanide, the concentration of the cationic antibacterial agent is 5-10%, the particle size of the nano titanium dioxide particles is 500-700nm, the concentration of the nano titanium dioxide particles is 3-5%, the drying temperature is 80-100℃, and the drying time is 0.5-1h. Both silver nitrate and polyhexamethylene biguanide have antibacterial properties. Silver nitrate can destroy the bacterial transport system by releasing silver ions, combine with the sulfur-hydrogen bonds of bacterial proteins, and destroy the three-dimensional structure of proteins, thereby having antibacterial properties. As a cationic surfactant, polyhexamethylene biguanide can be directionally adsorbed on the negatively charged bacterial cell membrane or cell wall surface, destroying the bacterial cell transport system, causing the cell membrane to rupture, and thus killing the bacteria.

[0044] The mass ratio of modified regenerated cellulose fiber, modified polylactic acid fiber and modified wool fiber in S4 is 50-85:5-40:5-40. Modified regenerated cellulose fiber has good thermal insulation performance, and its structure helps to maintain the structural integrity of the quilt core material, reduce fiber breakage and deformation during use, thereby extending the service life of the quilt core material and providing better thermal insulation performance. Modified polylactic acid fiber can increase the air layer due to its special structure, thereby improving the thermal insulation effect. The air layer can store heat, reduce heat loss, and enhance the thermal insulation of the quilt core material. Modified wool fiber can further enhance its thermal insulation performance through modification treatment because wool fiber itself has excellent thermal insulation performance.

[0045] Polylactic acid fiber and regenerated cellulose fiber have certain antibacterial properties, and the silica on wool can make wool fiber have antibacterial properties. The setting of mass ratio can make the characteristics of different fibers in the quilt core material complement each other, optimize the overall performance of the quilt core material, and maintain good warmth retention, antibacterial properties and other use effects.

[0046] The S4 laying method is one of the following: the modified regenerated cellulose fiber, the modified polylactic acid fiber and the modified wool fiber are mixed evenly and then laid, or the layers are laid separately. The combing speed is 10-30m / min, the setting temperature is 100-120℃, and the setting time is 10-15min. The mixed and evenly laid web can make the modified regenerated cellulose fiber, the pretreated polylactic acid fiber and the modified wool fiber more evenly distributed in the quilt core material. This uniform distribution helps to improve the overall warmth retention of the quilt core material, because the characteristics of different fibers can complement each other to form a more effective air isolation layer and reduce heat loss. Separately laying the webs in layers can give full play to the advantages of each fiber to perform different functions. The combing speed is in the range of 10-30m / min, which can ensure that the wool fiber is fully combed and dispersed during the combing process to avoid fiber entanglement and knotting. This helps to make the fibers more evenly distributed in the quilt core material and optimize the fiber arrangement structure. The uniform fiber arrangement structure can reduce heat loss and improve the warmth retention of the quilt core material. Combing and shaping can optimize the arrangement structure of wool fibers, forming a more uniform fiber network in the quilt core material. This helps to improve the breathability of the quilt core material, reduce moisture and stuffiness, and thus reduce the possibility of bacterial growth.

[0047] The combination of regenerated cellulose fiber and polylactic acid fiber provides additional structural stability. Regenerated cellulose fiber generally has high strength and toughness, while polylactic acid fiber has good softness. This combination helps maintain the structural integrity of the quilt core material, reducing fiber breakage and deformation during use, thereby extending the service life of the quilt core material. The blend of regenerated cellulose fiber and polylactic acid fiber can provide better thermal insulation performance. Regenerated cellulose fiber has good thermal insulation performance, while polylactic acid fiber can increase the air layer due to its special structure, thereby improving the thermal insulation effect.

[0048] The particle size of the nano-silica powder in S3 is 100-200nm, the concentration of the silica dispersion is 3-5%, and the solvent of the silica dispersion is acetone. Due to its tiny particle size and high specific surface area, the nano-silica particles can be evenly distributed on the surface and inside of the wool fiber. This distribution method can enhance the interaction between the wool fibers, thereby improving the overall structural stability of the quilt core material. The stable structure helps to reduce the displacement and deformation of the fibers during use, thereby maintaining the thermal insulation performance of the quilt core material. The surface of the nano-silica particles has a large number of hydroxyl groups and active sites, which can adsorb and destroy the cell walls of bacteria, thereby achieving an antibacterial effect. Bacterial growth is one of the main reasons for the odor of wool quilt core materials. The antibacterial property of nano-silica can effectively inhibit the growth of bacteria, thereby reducing the generation of odor.

[0049] The wool fibers in S3 include fine wool and coarse wool. The diameter of fine wool is 18-24μm, the diameter of coarse wool is 45-55μm, and the length of wool fiber is 40-120mm. The diameter of fine wool is smaller, which can form a tighter fiber arrangement and reduce the gaps between fibers, thereby improving the thermal insulation performance of the quilt core material. The density of scales on the fiber surface of fine wool is larger, and the shrinkage is good, which helps to closely combine the fibers and further enhance the thermal insulation effect. Although the diameter of coarse wool is larger, its length is longer, which can increase the thickness and fluffiness of the quilt core material and provide an additional thermal insulation layer. The fiber structure of fine wool is tighter, which helps to reduce the space for bacterial growth. At the same time, the fiber surface of coarse wool is easier to adhere to nano-silicon dioxide particles, thereby enhancing the antibacterial performance of the quilt core material. The fiber structure of coarse wool is relatively loose, which helps to increase the air permeability of the quilt core material. Good air permeability can reduce the dampness and stuffiness inside the quilt core material, reduce the environment for bacterial growth, and thus reduce the generation of odor.

[0050] The combination of fine and coarse wool can form a stronger fiber network. This network structure can enhance the durability of the quilt core material and reduce the decrease in warmth and odor caused by fiber breakage or wear.

[0051] The concentration of sodium dodecyl sulfate in S3 is 0.3-0.5%, the pH in the silica dispersion is 5.5-6.5, and the mass ratio of fine hair to coarse hair in wool fiber is 2:8-4:6. Sodium dodecyl sulfate can significantly reduce the surface tension of the solution and enhance the dispersibility and stability of nano-silica particles in the solvent. Lower concentrations may make the particles more inclined to adhere to coarse hair, the scale layer of coarse hair may be larger and rougher, providing more attachment points; while the scale layer of fine hair may be finer and tighter, with relatively fewer attachment points, and silica particles will be more inclined to adhere to coarse hair.

[0052] Coarse wool has good thermal insulation performance due to its large diameter and fluffy fibers. When more silica particles are attached to coarse wool, its thermal insulation effect can be further enhanced. Fine wool has a small diameter and fine fibers, and has good air permeability. When fewer silica particles are attached to fine wool, its air permeability can be maintained. Good air permeability helps reduce the dampness and stuffiness inside the quilt core material, thereby maintaining the comfort and thermal insulation performance of the quilt core material. At the same time, fewer silica particles attached to fine wool help maintain the curvature of the fine wool, which can ensure the fluffiness and thermal insulation of the quilt core material.

[0053] Silica particles themselves have excellent antibacterial properties and can destroy the cell walls and cell membranes of bacteria, thereby achieving the effect of killing bacteria. When more silica particles are attached to the coarse hair, the surface of the coarse hair can have stronger antibacterial properties, thereby reducing the growth of bacteria inside the quilt core material. Coarse hair is easy to become an environment for bacterial growth due to its high fluffiness and large gaps between fibers. By making more silica particles attached to the coarse hair, these gaps can be filled and the space for bacterial growth can be reduced. At the same time, the attachment of silica particles can also change the microenvironment on the surface of the coarse hair, making it unfavorable for the growth and reproduction of bacteria.

[0054] During the processing of modified wool fibers, some antimicrobial agents or antimicrobial finishing agents may be added, which gives them excellent antimicrobial properties. This antimicrobial property helps reduce the growth of bacteria inside the quilt core material, thereby reducing the generation of odors. At the same time, the fiber structure of modified wool fibers is more compact, which is not easy to breed bacteria, and also helps to reduce the generation of odors.

[0055] A wool fiber quilt core material is prepared based on a method for preparing a wool fiber quilt core material.

[0056] Embodiment 1

[0057] This embodiment prepares a wool fiber quilt core material, including the following steps:

[0058] S1: The lyocell fiber is immersed in an alkaline solution for 1 hour, the alkaline solution is a sodium hydroxide solution with a concentration of 3%, and the polylactic acid fiber is subjected to ultrasonic treatment, the ultrasonic treatment frequency is 50kHz, and the ultrasonic treatment time is 45min. The fineness of the lyocell fiber and the polylactic acid fiber are 4D and 8D respectively, and pretreated lyocell fiber and pretreated polylactic acid fiber are obtained respectively;

[0059] S2: preparing a cationic antibacterial agent solution with nano-titanium dioxide particles and a cationic antibacterial agent, wherein the cationic antibacterial agent in the cationic antibacterial agent solution is silver nitrate, the concentration of the cationic antibacterial agent is 7%, the particle size of the nano-titanium dioxide particles is 600 nm, and the concentration of the nano-titanium dioxide particles is 2%. The pretreated lyocell fiber and the pretreated polylactic acid fiber in S1 are subjected to atomization spraying treatment for 2 hours using the cationic antibacterial agent solution, and then dried at a drying temperature of 80° C. for a drying time of 1 hour to obtain modified lyocell fiber and modified polylactic acid fiber, respectively.

[0060] S3: Prepare a silica dispersion from nano-silicon dioxide powder, wherein the particle size of the nano-silicon dioxide powder is 150 nm, the concentration of the silica dispersion is 4%, and the solvent of the silica dispersion is acetone. Soak the wool fiber in the silica dispersion for 4 hours. The wool fiber includes fine hair and coarse hair. The diameter of the fine hair is 20 μm, the diameter of the coarse hair is 50 μm, and the length of the wool fiber is 80 mm. The silica dispersion contains sodium dodecyl sulfate, and the concentration of sodium dodecyl sulfate is 0.4%. The pH of the silica dispersion is 6, and the mass ratio of fine hair to coarse hair in the wool fiber is 2:8. Take out and dry to obtain the modified wool fiber;

[0061] S4: The modified lyocell fiber, modified polylactic acid fiber and modified wool fiber in S2 are combed and laid, wherein the modified lyocell fiber, modified polylactic acid fiber and modified wool fiber are mixed evenly and then laid, and the mass ratio of the modified regenerated cellulose fiber, modified polylactic acid fiber and modified wool fiber is 75:15:10. Then, the fibers are shaped, and the combing speed is 20 m / min, the shaping temperature is 100°C, and the shaping time is 10 min to obtain a wool fiber quilt core material.

[0062] Embodiment 2

[0063] This embodiment prepares a wool fiber quilt core material, including the following steps:

[0064] S1: The lyocell fiber is immersed in an alkaline solution for 1 hour, the alkaline solution is a sodium hydroxide solution with a concentration of 3%, and the polylactic acid fiber is subjected to ultrasonic treatment, the ultrasonic treatment frequency is 50kHz, and the ultrasonic treatment time is 45min. The fineness of the lyocell fiber and the polylactic acid fiber are 4D and 8D respectively, and pretreated lyocell fiber and pretreated polylactic acid fiber are obtained respectively;

[0065] S2: preparing a cationic antibacterial agent solution with nano-titanium dioxide particles and a cationic antibacterial agent, wherein the cationic antibacterial agent in the cationic antibacterial agent solution is silver nitrate, the concentration of the cationic antibacterial agent is 7%, the particle size of the nano-titanium dioxide particles is 600 nm, and the concentration of the nano-titanium dioxide particles is 3%. The pretreated lyocell fiber and the pretreated polylactic acid fiber in S1 are subjected to atomization spraying treatment for 2 hours using the cationic antibacterial agent solution, and then dried at a drying temperature of 80° C. for a drying time of 1 hour to obtain modified lyocell fiber and modified polylactic acid fiber, respectively.

[0066] S3: Prepare a silica dispersion from nano-silicon dioxide powder, wherein the particle size of the nano-silicon dioxide powder is 150 nm, the concentration of the silica dispersion is 4%, and the solvent of the silica dispersion is acetone. Soak the wool fiber in the silica dispersion for 4 hours. The wool fiber includes fine hair and coarse hair. The diameter of the fine hair is 20 μm, the diameter of the coarse hair is 50 μm, and the length of the wool fiber is 80 mm. The silica dispersion contains sodium dodecyl sulfate, and the concentration of sodium dodecyl sulfate is 0.4%. The pH of the silica dispersion is 6, and the mass ratio of fine hair to coarse hair in the wool fiber is 2:8. Take out and dry to obtain the modified wool fiber;

[0067] S4: The modified lyocell fiber, modified polylactic acid fiber and modified wool fiber in S2 are combed and laid, wherein the modified lyocell fiber, modified polylactic acid fiber and modified wool fiber are mixed evenly and then laid, and the mass ratio of the modified regenerated cellulose fiber, modified polylactic acid fiber and modified wool fiber is 75:15:10. Then, the fibers are shaped, and the combing speed is 20 m / min, the shaping temperature is 100°C, and the shaping time is 10 min to obtain a wool fiber quilt core material.

[0068] Embodiment 3

[0069] This embodiment prepares a wool fiber quilt core material, including the following steps:

[0070] S1: The lyocell fiber is immersed in an alkaline solution for 1 hour, the alkaline solution is a sodium hydroxide solution with a concentration of 3%, and the polylactic acid fiber is subjected to ultrasonic treatment, the ultrasonic treatment frequency is 50kHz, and the ultrasonic treatment time is 45min. The fineness of the lyocell fiber and the polylactic acid fiber are 4D and 8D respectively, and pretreated lyocell fiber and pretreated polylactic acid fiber are obtained respectively;

[0071] S2: preparing a cationic antibacterial agent solution with nano-titanium dioxide particles and a cationic antibacterial agent, wherein the cationic antibacterial agent in the cationic antibacterial agent solution is silver nitrate, the concentration of the cationic antibacterial agent is 7%, the particle size of the nano-titanium dioxide particles is 600 nm, and the concentration of the nano-titanium dioxide particles is 4%. The pretreated lyocell fiber and the pretreated polylactic acid fiber in S1 are subjected to atomization spraying treatment for 2 hours using the cationic antibacterial agent solution, and then dried at a drying temperature of 80° C. for a drying time of 1 hour to obtain modified lyocell fiber and modified polylactic acid fiber, respectively.

[0072] S3: Prepare a silica dispersion from nano-silicon dioxide powder, wherein the particle size of the nano-silicon dioxide powder is 150 nm, the concentration of the silica dispersion is 4%, and the solvent of the silica dispersion is acetone. Soak the wool fiber in the silica dispersion for 4 hours. The wool fiber includes fine hair and coarse hair. The diameter of the fine hair is 20 μm, the diameter of the coarse hair is 50 μm, and the length of the wool fiber is 80 mm. The silica dispersion contains sodium dodecyl sulfate, and the concentration of sodium dodecyl sulfate is 0.4%. The pH of the silica dispersion is 6, and the mass ratio of fine hair to coarse hair in the wool fiber is 2:8. Take out and dry to obtain the modified wool fiber;

[0073] S4: The modified lyocell fiber, modified polylactic acid fiber and modified wool fiber in S2 are combed and laid, wherein the modified lyocell fiber, modified polylactic acid fiber and modified wool fiber are mixed evenly and then laid, and the mass ratio of the modified regenerated cellulose fiber, modified polylactic acid fiber and modified wool fiber is 75:15:10. Then, the fibers are shaped, and the combing speed is 20 m / min, the shaping temperature is 100°C, and the shaping time is 10 min to obtain a wool fiber quilt core material.

[0074] Embodiment 4

[0075] This embodiment prepares a wool fiber quilt core material, including the following steps:

[0076] S1: The lyocell fiber is immersed in an alkaline solution for 1 hour, the alkaline solution is a sodium hydroxide solution with a concentration of 3%, and the polylactic acid fiber is subjected to ultrasonic treatment, the ultrasonic treatment frequency is 50kHz, and the ultrasonic treatment time is 45min. The fineness of the lyocell fiber and the polylactic acid fiber are 4D and 8D respectively, and pretreated lyocell fiber and pretreated polylactic acid fiber are obtained respectively;

[0077] S2: preparing a cationic antibacterial agent solution with nano-titanium dioxide particles and a cationic antibacterial agent, wherein the cationic antibacterial agent in the cationic antibacterial agent solution is silver nitrate, the concentration of the cationic antibacterial agent is 7%, the particle size of the nano-titanium dioxide particles is 600 nm, and the concentration of the nano-titanium dioxide particles is 5%. The pretreated lyocell fiber and the pretreated polylactic acid fiber in S1 are subjected to atomization spraying treatment for 2 hours using the cationic antibacterial agent solution, and then dried at a drying temperature of 80° C. for a drying time of 1 hour to obtain modified lyocell fiber and modified polylactic acid fiber, respectively.

[0078] S3: Prepare a silica dispersion from nano-silicon dioxide powder, wherein the particle size of the nano-silicon dioxide powder is 150 nm, the concentration of the silica dispersion is 4%, and the solvent of the silica dispersion is acetone. Soak the wool fiber in the silica dispersion for 4 hours. The wool fiber includes fine hair and coarse hair. The diameter of the fine hair is 20 μm, the diameter of the coarse hair is 50 μm, and the length of the wool fiber is 80 mm. The silica dispersion contains sodium dodecyl sulfate, and the concentration of sodium dodecyl sulfate is 0.4%. The pH of the silica dispersion is 6, and the mass ratio of fine hair to coarse hair in the wool fiber is 2:8. Take out and dry to obtain the modified wool fiber;

[0079] S4: The modified lyocell fiber, modified polylactic acid fiber and modified wool fiber in S2 are combed and laid, wherein the modified lyocell fiber, modified polylactic acid fiber and modified wool fiber are mixed evenly and then laid, and the mass ratio of the modified regenerated cellulose fiber, modified polylactic acid fiber and modified wool fiber is 75:15:10. Then, the fibers are shaped, and the combing speed is 20 m / min, the shaping temperature is 100°C, and the shaping time is 10 min to obtain a wool fiber quilt core material.

[0080] Embodiment 5

[0081] This embodiment prepares a wool fiber quilt core material, including the following steps:

[0082] S1: The lyocell fiber is immersed in an alkaline solution for 1 hour, the alkaline solution is a sodium hydroxide solution with a concentration of 3%, and the polylactic acid fiber is subjected to ultrasonic treatment, the ultrasonic treatment frequency is 50kHz, and the ultrasonic treatment time is 45min. The fineness of the lyocell fiber and the polylactic acid fiber are 4D and 8D respectively, and pretreated lyocell fiber and pretreated polylactic acid fiber are obtained respectively;

[0083] S2: preparing a cationic antibacterial agent solution with nano-titanium dioxide particles and a cationic antibacterial agent, wherein the cationic antibacterial agent in the cationic antibacterial agent solution is silver nitrate, the concentration of the cationic antibacterial agent is 7%, the particle size of the nano-titanium dioxide particles is 600 nm, and the concentration of the nano-titanium dioxide particles is 6%. The pretreated lyocell fiber and the pretreated polylactic acid fiber in S1 are subjected to atomization spraying treatment for 2 hours using the cationic antibacterial agent solution, and then dried at a drying temperature of 80° C. for a drying time of 1 hour to obtain modified lyocell fiber and modified polylactic acid fiber, respectively.

[0084] S3: Prepare a silica dispersion from nano-silicon dioxide powder, wherein the particle size of the nano-silicon dioxide powder is 150 nm, the concentration of the silica dispersion is 4%, and the solvent of the silica dispersion is acetone. Soak the wool fiber in the silica dispersion for 4 hours. The wool fiber includes fine hair and coarse hair. The diameter of the fine hair is 20 μm, the diameter of the coarse hair is 50 μm, and the length of the wool fiber is 80 mm. The silica dispersion contains sodium dodecyl sulfate, and the concentration of sodium dodecyl sulfate is 0.4%. The pH of the silica dispersion is 6, and the mass ratio of fine hair to coarse hair in the wool fiber is 2:8. Take out and dry to obtain the modified wool fiber;

[0085] S4: The modified lyocell fiber, modified polylactic acid fiber and modified wool fiber in S2 are combed and laid, wherein the modified lyocell fiber, modified polylactic acid fiber and modified wool fiber are mixed evenly and then laid, and the mass ratio of the modified regenerated cellulose fiber, modified polylactic acid fiber and modified wool fiber is 75:15:10. Then, the fibers are shaped, and the combing speed is 20 m / min, the shaping temperature is 100°C, and the shaping time is 10 min to obtain a wool fiber quilt core material.

[0086] Embodiment 6

[0087] This embodiment prepares a wool fiber quilt core material, including the following steps:

[0088] S1: The lyocell fiber is immersed in an alkaline solution for 1 hour, the alkaline solution is a sodium hydroxide solution with a concentration of 3%, and the polylactic acid fiber is subjected to ultrasonic treatment, the ultrasonic treatment frequency is 50kHz, and the ultrasonic treatment time is 45min. The fineness of the lyocell fiber and the polylactic acid fiber are 4D and 8D respectively, and pretreated lyocell fiber and pretreated polylactic acid fiber are obtained respectively;

[0089] S2: preparing a cationic antibacterial agent solution with nano-titanium dioxide particles and a cationic antibacterial agent, wherein the cationic antibacterial agent in the cationic antibacterial agent solution is silver nitrate, the concentration of the cationic antibacterial agent is 7%, the particle size of the nano-titanium dioxide particles is 600 nm, and the concentration of the nano-titanium dioxide particles is 4%. The pretreated lyocell fiber and the pretreated polylactic acid fiber in S1 are subjected to atomization spraying treatment for 2 hours using the cationic antibacterial agent solution, and then dried at a drying temperature of 80° C. for a drying time of 1 hour to obtain modified lyocell fiber and modified polylactic acid fiber, respectively.

[0090] S3: Prepare a silica dispersion from nano-silicon dioxide powder, wherein the particle size of the nano-silicon dioxide powder is 150 nm, the concentration of the silica dispersion is 4%, and the solvent of the silica dispersion is acetone. Soak the wool fiber in the silica dispersion for 4 hours. The wool fiber includes fine hair and coarse hair. The diameter of the fine hair is 20 μm, the diameter of the coarse hair is 50 μm, and the length of the wool fiber is 80 mm. The silica dispersion contains sodium dodecyl sulfate, and the concentration of sodium dodecyl sulfate is 0.4%. The pH of the silica dispersion is 6, and the mass ratio of fine hair to coarse hair in the wool fiber is 1:9. Take out and dry to obtain the modified wool fiber;

[0091] S4: The modified lyocell fiber, modified polylactic acid fiber and modified wool fiber in S2 are combed and laid, wherein the modified lyocell fiber, modified polylactic acid fiber and modified wool fiber are mixed evenly and then laid, and the mass ratio of the modified regenerated cellulose fiber, modified polylactic acid fiber and modified wool fiber is 75:15:10. Then, the fibers are shaped, and the combing speed is 20 m / min, the shaping temperature is 100°C, and the shaping time is 10 min to obtain a wool fiber quilt core material.

[0092] Embodiment 7

[0093] This embodiment prepares a wool fiber quilt core material, including the following steps:

[0094] S1: The lyocell fiber is immersed in an alkaline solution for 1 hour, the alkaline solution is a sodium hydroxide solution with a concentration of 3%, and the polylactic acid fiber is subjected to ultrasonic treatment, the ultrasonic treatment frequency is 50kHz, and the ultrasonic treatment time is 45min. The fineness of the lyocell fiber and the polylactic acid fiber are 4D and 8D respectively, and pretreated lyocell fiber and pretreated polylactic acid fiber are obtained respectively;

[0095] S2: preparing a cationic antibacterial agent solution with nano-titanium dioxide particles and a cationic antibacterial agent, wherein the cationic antibacterial agent in the cationic antibacterial agent solution is silver nitrate, the concentration of the cationic antibacterial agent is 7%, the particle size of the nano-titanium dioxide particles is 600 nm, and the concentration of the nano-titanium dioxide particles is 4%. The pretreated lyocell fiber and the pretreated polylactic acid fiber in S1 are subjected to atomization spraying treatment for 2 hours using the cationic antibacterial agent solution, and then dried at a drying temperature of 80° C. for a drying time of 1 hour to obtain modified lyocell fiber and modified polylactic acid fiber, respectively.

[0096] S3: Prepare a silica dispersion from nano-silicon dioxide powder, wherein the particle size of the nano-silicon dioxide powder is 150 nm, the concentration of the silica dispersion is 4%, and the solvent of the silica dispersion is acetone. Soak the wool fiber in the silica dispersion for 4 hours. The wool fiber includes fine hair and coarse hair. The diameter of the fine hair is 20 μm, the diameter of the coarse hair is 50 μm, and the length of the wool fiber is 80 mm. The silica dispersion contains sodium dodecyl sulfate, and the concentration of sodium dodecyl sulfate is 0.4%. The pH of the silica dispersion is 6, and the mass ratio of fine hair to coarse hair in the wool fiber is 3:7. Take out and dry to obtain the modified wool fiber;

[0097] S4: The modified lyocell fiber, modified polylactic acid fiber and modified wool fiber in S2 are combed and laid, wherein the modified lyocell fiber, modified polylactic acid fiber and modified wool fiber are mixed evenly and then laid, and the mass ratio of the modified regenerated cellulose fiber, modified polylactic acid fiber and modified wool fiber is 75:15:10. Then, the fibers are shaped, and the combing speed is 20 m / min, the shaping temperature is 100°C, and the shaping time is 10 min to obtain a wool fiber quilt core material.

[0098] Embodiment 8

[0099] This embodiment prepares a wool fiber quilt core material, including the following steps:

[0100] S1: The lyocell fiber is immersed in an alkaline solution for 1 hour, the alkaline solution is a sodium hydroxide solution with a concentration of 3%, and the polylactic acid fiber is subjected to ultrasonic treatment, the ultrasonic treatment frequency is 50kHz, and the ultrasonic treatment time is 45min. The fineness of the lyocell fiber and the polylactic acid fiber are 4D and 8D respectively, and pretreated lyocell fiber and pretreated polylactic acid fiber are obtained respectively;

[0101] S2: preparing a cationic antibacterial agent solution with nano-titanium dioxide particles and a cationic antibacterial agent, wherein the cationic antibacterial agent in the cationic antibacterial agent solution is silver nitrate, the concentration of the cationic antibacterial agent is 7%, the particle size of the nano-titanium dioxide particles is 600 nm, and the concentration of the nano-titanium dioxide particles is 4%. The pretreated lyocell fiber and the pretreated polylactic acid fiber in S1 are subjected to atomization spraying treatment for 2 hours using the cationic antibacterial agent solution, and then dried at a drying temperature of 80° C. for a drying time of 1 hour to obtain modified lyocell fiber and modified polylactic acid fiber, respectively.

[0102] S3: Prepare a silica dispersion from nano-silicon dioxide powder, wherein the particle size of the nano-silicon dioxide powder is 150 nm, the concentration of the silica dispersion is 4%, and the solvent of the silica dispersion is acetone. Soak the wool fiber in the silica dispersion for 4 hours. The wool fiber includes fine hair and coarse hair. The diameter of the fine hair is 20 μm, the diameter of the coarse hair is 50 μm, and the length of the wool fiber is 80 mm. The silica dispersion contains sodium dodecyl sulfate, and the concentration of sodium dodecyl sulfate is 0.4%. The pH of the silica dispersion is 6, and the mass ratio of fine hair to coarse hair in the wool fiber is 4:6. Take out and dry to obtain the modified wool fiber;

[0103] S4: The modified lyocell fiber, modified polylactic acid fiber and modified wool fiber in S2 are combed and laid, wherein the modified lyocell fiber, modified polylactic acid fiber and modified wool fiber are mixed evenly and then laid, and the mass ratio of the modified regenerated cellulose fiber, modified polylactic acid fiber and modified wool fiber is 75:15:10. Then, the fibers are shaped, and the combing speed is 20 m / min, the shaping temperature is 100°C, and the shaping time is 10 min to obtain a wool fiber quilt core material.

[0104] Embodiment 9

[0105] This embodiment prepares a wool fiber quilt core material, including the following steps:

[0106] S1: The lyocell fiber is immersed in an alkaline solution for 1 hour, the alkaline solution is a sodium hydroxide solution with a concentration of 3%, and the polylactic acid fiber is subjected to ultrasonic treatment, the ultrasonic treatment frequency is 50kHz, and the ultrasonic treatment time is 45min. The fineness of the lyocell fiber and the polylactic acid fiber are 4D and 8D respectively, and pretreated lyocell fiber and pretreated polylactic acid fiber are obtained respectively;

[0107] S2: preparing a cationic antibacterial agent solution with nano-titanium dioxide particles and a cationic antibacterial agent, wherein the cationic antibacterial agent in the cationic antibacterial agent solution is silver nitrate, the concentration of the cationic antibacterial agent is 7%, the particle size of the nano-titanium dioxide particles is 600 nm, and the concentration of the nano-titanium dioxide particles is 4%. The pretreated lyocell fiber and the pretreated polylactic acid fiber in S1 are subjected to atomization spraying treatment for 2 hours using the cationic antibacterial agent solution, and then dried at a drying temperature of 80° C. for a drying time of 1 hour to obtain modified lyocell fiber and modified polylactic acid fiber, respectively.

[0108] S3: Prepare a silica dispersion from nano-silicon dioxide powder, wherein the particle size of the nano-silicon dioxide powder is 150 nm, the concentration of the silica dispersion is 4%, and the solvent of the silica dispersion is acetone. Soak the wool fiber in the silica dispersion for 4 hours. The wool fiber includes fine hair and coarse hair. The diameter of the fine hair is 20 μm, the diameter of the coarse hair is 50 μm, and the length of the wool fiber is 80 mm. The silica dispersion contains sodium dodecyl sulfate, and the concentration of sodium dodecyl sulfate is 0.4%. The pH of the silica dispersion is 6, and the mass ratio of fine hair to coarse hair in the wool fiber is 5:5. Take out and dry to obtain the modified wool fiber;

[0109] S4: The modified lyocell fiber, modified polylactic acid fiber and modified wool fiber in S2 are combed and laid, wherein the modified lyocell fiber, modified polylactic acid fiber and modified wool fiber are mixed evenly and then laid, and the mass ratio of the modified regenerated cellulose fiber, modified polylactic acid fiber and modified wool fiber is 75:15:10. Then, the fibers are shaped, and the combing speed is 20 m / min, the shaping temperature is 100°C, and the shaping time is 10 min to obtain a wool fiber quilt core material.

[0110] Comparative Example 1

[0111] This comparative example prepares a wool fiber quilt core material, comprising the following steps:

[0112] Wool fibers with a fiber diameter of 35 μm were immersed in a 7% concentration of silver nitrate solution for 1 hour, and then taken out and dried, and then the fibers were combed, laid and shaped to obtain a wool fiber quilt core material.

[0113] Samples of equal mass were taken from Examples 1 to 9 and Comparative Example 1, and the samples were placed in a constant temperature and humidity environment at 25°C and 60%RH for 500h, and the warmth retention and antibacterial rate of the samples were tested. The warmth retention rate test standard was the national standard GB / T35762-2017 plate method, and the antibacterial rate test standard was the national standard GB / T20944.3-2008 "Evaluation of Antibacterial Properties of Textiles Part 3: Oscillation Method". The test results are shown in Table 1.

[0114] Table 1 Experimental data of warmth retention and antibacterial rate of Examples 1 to 9 and Comparative Example 1

[0115]

[0116] It can be seen from Table 1 that the warmth retention rate and antibacterial rate of the samples in Examples 1 to 9 are greater than those in Comparative Example 1, and the preparation method of the wool fiber quilt core material in the present application is superior.

[0117] In Examples 1 to 5, as the concentration of nano-titanium dioxide particles in the cationic antibacterial agent solution gradually increases, the warmth retention rate and antibacterial effect first increase and then decrease. This is because as the concentration of nano-titanium dioxide particles increases, their specific surface area and contact area increase, which can more effectively adsorb and kill bacteria, thereby improving the antibacterial rate. Nano-titanium dioxide particles can promote the bonding of various fibers in the quilt core material, improve the density of the quilt core material structure, and improve the warmth retention rate. However, when the concentration of nano-titanium dioxide particles is too high, the particles aggregate, reducing the effective contact area, reducing the antibacterial effect, and reducing the air retention capacity, resulting in a decrease in warmth retention capacity. The preferred embodiment is Example 3.

[0118] In Example 3 and Examples 6 to 9, as the mass ratio of fine hair to coarse hair in wool fiber increases, the warmth retention rate and antibacterial effect first increase and then decrease. This is because the fine hair has a larger fiber surface scale density and good shrinkage, which helps to closely bond between fibers and further enhance the warmth retention effect. The fine hair can increase the bonding between titanium dioxide and silicon dioxide and the bonding effect between various fibers, which can improve the antibacterial rate. However, when the fine hair ratio is too high, the gaps between fibers are too large, thereby reducing the warmth retention. The fine hair has a weak ability to adhere to silicon dioxide, resulting in a reduction in the content of silicon dioxide in the quilt core material, thereby reducing the fixation effect on cationic antibacterial agents and titanium dioxide, and weakening the antibacterial rate. The preferred embodiment is Example 7.

[0119] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A method for preparing a wool fiber quilt core material, characterized in that: The following steps are involved: S1: soaking the regenerated cellulose fiber in an alkaline solution and subjecting the polylactic acid fiber to ultrasonic treatment to obtain pretreated regenerated cellulose fiber and pretreated polylactic acid fiber respectively; S2: preparing a cationic antibacterial agent solution with nano-titanium dioxide particles and a cationic antibacterial agent, and using the cationic antibacterial agent solution to atomize and spray the pretreated regenerated cellulose fiber and the pretreated polylactic acid fiber in S1 for 1-2 hours, and obtaining modified regenerated cellulose fiber and modified polylactic acid fiber respectively after drying; the cationic antibacterial agent in the cationic antibacterial agent solution is one of silver nitrate or polyhexamethylene biguanide, the concentration of the cationic antibacterial agent is 5-10%, the particle size of the nano-titanium dioxide particles is 500-700nm, the concentration of the nano-titanium dioxide particles is 3-5%, the drying temperature is 80-100°C, and the drying time is 0.5-1h; S3: Prepare a silica dispersion from nano-silicon dioxide powder, wherein the silica dispersion contains sodium dodecyl sulfate, immerse wool fiber in the silica dispersion for 3-4 hours, take out and dry to obtain modified wool fiber; the concentration of the sodium dodecyl sulfate is 0.3-0.5%, the pH of the silica dispersion is 7.5-8.5, the wool fiber includes fine hair and coarse hair, the diameter of the fine hair is 18-24 μm, the diameter of the coarse hair is 45-55 μm, the length of the wool fiber is 40-120 mm, and the mass ratio of the fine hair to the coarse hair is 2:8-4:6; S4: combing and web-laying the modified regenerated cellulose fiber, the modified polylactic acid fiber and the modified wool fiber in S2, and then shaping them to obtain a wool fiber quilt core material, wherein the mass content of the modified polylactic acid fiber in the wool fiber quilt core material is greater than 5%.

2. The method for preparing a wool fiber quilt core material according to claim 1, characterized in that: The alkaline solution in S1 is a sodium hydroxide solution with a concentration of 3%, the immersion time is 1-2 hours, the ultrasonic treatment frequency is 40-60kHz, and the ultrasonic treatment time is 30-60min.

3. The method for preparing a wool fiber quilt core material according to claim 1, characterized in that: The fineness of the regenerated cellulose fiber and the polylactic acid fiber in S1 is 3-5D and 6-8D respectively, and the regenerated cellulose fiber is one of lyocell fiber, viscose fiber and modal fiber.

4. The method for preparing a wool fiber quilt core material according to claim 1, characterized in that: The particle size of the nano silicon dioxide powder in S3 is 100-200 nm, the concentration of the silicon dioxide dispersion is 3-5%, and the solvent of the silicon dioxide dispersion is acetone.

5. The method for preparing a wool fiber quilt core material according to claim 1, characterized in that: The mass ratio of the modified regenerated cellulose fiber, the modified polylactic acid fiber and the modified wool fiber in S4 is 50-85:5-40:5-40.

6. The method for preparing a wool fiber quilt core material according to claim 1, characterized in that: The S4 laying method is one of: laying the modified regenerated cellulose fiber, the modified polylactic acid fiber and the modified wool fiber after being evenly mixed, and laying them in layers respectively, the combing speed is 10-30m / min, the setting temperature is 100-120℃, and the setting time is 10-15min.

7. A wool fiber quilt core material, characterized in that: It is prepared by the method for preparing a wool fiber quilt core material according to any one of claims 1-6.

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