Cashmere blended yarn and preparation process thereof

Abstract

The invention relates to a preparation process of cashmere blended yarns. The preparation process comprises the following steps: respectively pretreating cashmere fibers and polyester fibers; the pretreated cashmere fibers and polyester fibers are fed into a cotton blending machine according to the weight part ratio of 2: 1 and then conveyed to a cotton curtain for cotton blending, and a mixed fiber material is obtained; performing opening picking, carding, gilling and combing on the mixed fiber material to obtain wool tops; the wool tops are subjected to fore-spinning gilling, roving, spinning, spooling, doubling, two-for-one twisting, yarn steaming and cone yarn finished product obtaining, and the cashmere blended yarn is obtained. According to the cashmere blended yarn and the preparation process thereof, the obtained yarn has good mechanical performance.

Description

Technical Field

[0001] The present invention relates to the field of textile fabrics, and particularly relates to a cashmere blended yarn and a preparation process thereof. Background Art

[0002] With the increasing pursuit of a healthy, environmentally friendly and natural lifestyle by people, the development of functional fiber fabrics is also increasing. Cashmere is the finest among animal fibers. Cashmere fibers have a wide range of application prospects in the fields of spinning and fabrics due to their characteristics of being slender, soft, good in warmth retention, natural and soft in color, and flexible and elastic. In particular, they show unique advantages in high-grade clothing fabrics and environmental protection and sustainable development. In addition, the fineness of cashmere fibers is about 15 microns, and they have a hollow structure, which enables them to automatically absorb moisture under the condition of changing external temperatures. In a dry environment, cashmere fibers can absorb up to 30% of moisture while maintaining excellent warmth retention performance. However, the defects of cashmere fibers such as fineness, short length, and poor strength have hindered the development of cashmere products. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a cashmere blended yarn and a preparation process thereof, and the obtained yarn has good mechanical properties.

[0004] In order to achieve the above purpose, the present invention provides the following technical solutions: A preparation process of a cashmere blended yarn, comprising the following steps: Pre-treat the cashmere fibers and polyester fibers respectively; Feed the pre-treated cashmere fibers and polyester fibers into a cotton mixing machine according to a weight ratio of 2:1, and conduct cotton mixing through a cotton conveying curtain to obtain a mixed fiber material; Conduct opening and cleaning of cotton → carding → gilling → combing on the mixed fiber material to obtain a sliver; Conduct front spinning gilling → roving → spinning → winding → doubling → twisting → steaming → winding into a bobbin on the sliver to obtain a cashmere blended yarn.

[0005] Preferably, the pre-treatment of the cashmere fibers includes: Nano modification: Immerse the cashmere fibers in a polyurethane nano solution for 12 - 24 hours; Bridging modification: Immerse the nano-modified cashmere fibers in a chitosan modification solution for 12 - 24 hours.

[0006] Preferably, the pre-treatment of the polyester fibers includes: Immerse the polyester fibers in a polyurethane nano solution for 12 - 24 hours.

[0007] Preferably, the preparation process of the polyurethane nano-solution is as follows: dissolve the modified silica and polyurethane in a mixed solvent of N,N-dimethylformamide and butyl acetate, and stir for 12 - 24 h to obtain the polyurethane nano-solution.

[0008] Preferably, the weight ratio of the modified silica, polyurethane, N,N-dimethylformamide, and butyl acetate is 1:1:2:4.

[0009] Preferably, the preparation process of the modified silica is as follows: add tetraethyl orthosilicate and sodium dodecylbenzenesulfonate into an ethanol solution with a volume fraction of 50%, continue to add ammonia water and stir until it turns white, then put it into an oven for hydrothermal reaction, where the temperature is set at 60 °C and the time is 2 h; after the reaction is completed, take it out, add hexadecyltrimethoxysilane, and then pour it into the oven for hydrothermal reaction, where the reaction temperature is 60 °C and the reaction time is 1 h; after the reaction is completed, dry the solution at 50 °C to obtain the modified silica.

[0010] Preferably, the weight ratio of tetraethyl orthosilicate, sodium dodecylbenzenesulfonate, ethanol solution, ammonia water, and hexadecyltrimethoxysilane is 1:1:4:1:2.

[0011] Preferably, the preparation process of the chitosan modified solution is as follows: mix chitosan, a sodium chloride solution with a mass fraction of 25%, dimethyl sulfate, and a sodium hydroxide solution with a mass fraction of 20%, and stir and react at 40 °C for 1 - 2 h to obtain the chitosan modified solution.

[0012] Preferably, the weight ratio of chitosan, sodium chloride solution, dimethyl sulfate, and sodium hydroxide solution is 3:1:2:1.

[0013] A cashmere blended yarn is prepared by the above preparation process.

[0014] In the present invention, the cashmere fibers and polyester fibers are nano-modified. The uniform dispersion of the nanoparticles also enables the fibers to form a grid connection and adhesion structure, thereby increasing the structural strength of the blended yarn. In addition, through the bridging modification of the cashmere fibers, the modified chitosan crosslinks the cashmere fibers through electrostatic and hydrogen bond interactions, and is intertwined with the nanoparticles of the cashmere fibers for loading, increasing the supramolecular interaction, enabling the cashmere fibers to crosslink and bridge with the polyester fibers, and making the blended yarn have stronger tensile strength and structural stability. Specific embodiments

[0015] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Additionally, it should be specifically noted that the raw materials and equipment of the present invention can all be obtained commercially, and will not be listed one by one. Among them, the raw materials of the present invention can all be obtained commercially and are well-known to those skilled in the art. Example 1:

[0016] A preparation process for a cashmere blended yarn includes the following steps: Pre-treat the cashmere fibers and polyester fibers separately: The pre-treatment of the cashmere fibers includes: nano-modification: soak the cashmere fibers in a polyurethane nano-solution for 12 h; bridging modification: soak the nano-modified cashmere fibers in a chitosan modification solution for 12 h; The pre-treatment of the polyester fibers includes: soak the polyester fibers in a polyurethane nano-solution for 12 h; Feed the pre-treated cashmere fibers and polyester fibers into a cotton mixing machine according to a weight ratio of 2:1, and mix them through the cotton feeding curtain to obtain a mixed fiber material; Perform open and cleaning of cotton → carding → gilling → combing on the mixed fiber material to obtain a sliver; Perform front spinning gilling → roving → spinning → winding → doubling → twisting → steaming → winding into a finished yarn on the sliver to obtain a cashmere blended yarn.

[0017] Among them, the preparation process of the polyurethane nano-solution is specifically as follows: dissolve modified silica and polyurethane in a mixed solvent of N, N-dimethylformamide and butyl acetate. Among them, the weight ratio of modified silica, polyurethane, N, N-dimethylformamide, and butyl acetate is 1:1:2:4, and stir for 12 h to obtain a polyurethane nano-solution; The preparation process of the modified silica is specifically as follows: add tetraethyl orthosilicate and sodium dodecylbenzenesulfonate to an ethanol solution with a volume fraction of 50%, continue to add ammonia water and stir until it turns white, then place it in an oven for hydrothermal reaction, where the temperature is set at 60 °C and the time is 2 h; after the reaction is completed, take it out, add hexadecyltrimethoxysilane, and then pour it into the oven for hydrothermal reaction, where the reaction temperature is 60 °C and the reaction time is 1 h; after the reaction is completed, dry the solution at 50 °C to obtain modified silica, where the weight ratio of tetraethyl orthosilicate, sodium dodecylbenzenesulfonate, ethanol solution, ammonia water, and hexadecyltrimethoxysilane is 1:1:4:1:2; The preparation process of the chitosan modified solution is specifically as follows: Chitosan, a 25% sodium chloride solution by mass fraction, dimethyl sulfate, and a 20% sodium hydroxide solution by mass fraction are mixed in a weight ratio of 3:1:2:1, and stirred at 40°C for 1 h to obtain the chitosan modified solution.

[0018] A cashmere blended yarn is prepared by the above preparation process. Example 2:

[0019] A preparation process of a cashmere blended yarn includes the following steps: Pre-treat the cashmere fibers and polyester fibers separately: The pre-treatment of the cashmere fibers includes: nano-modification: soaking the cashmere fibers in a polyurethane nano-solution for 24 h; bridging modification: soaking the nano-modified cashmere fibers in the chitosan modified solution for 24 h; The pre-treatment of the polyester fibers includes: soaking the polyester fibers in a polyurethane nano-solution for 24 h; Feed the pre-treated cashmere fibers and polyester fibers into a cotton mixing machine according to a weight ratio of 2:1, and mix the cotton through the cotton feeding curtain to obtain a mixed fiber material; Perform opening and cleaning of cotton → carding → gilling → combing on the mixed fiber material to obtain a sliver; Perform front spinning gilling → roving → spinning → winding → doubling → twisting → steaming → winding into a bobbin on the sliver to obtain a cashmere blended yarn.

[0020] Among them, the preparation process of the polyurethane nano-solution is specifically as follows: Dissolve modified silica and polyurethane in a mixed solvent of N,N-dimethylformamide and butyl acetate. Among them, the weight ratio of modified silica, polyurethane, N,N-dimethylformamide, and butyl acetate is 1:1:2:4, and stir for 24 h to obtain the polyurethane nano-solution; The preparation process of the modified silica is specifically as follows: Add tetraethyl orthosilicate and sodium dodecylbenzenesulfonate to an ethanol solution with a volume fraction of 50%, continue to add ammonia water and stir until it turns white, then put it into an oven for hydrothermal reaction, where the temperature is set at 60°C and the time is 2 h; After the reaction is completed, take it out, add hexadecyltrimethoxysilane, and then pour it into the oven for hydrothermal reaction, where the reaction temperature is 60°C and the reaction time is 1 h; After the reaction is completed, dry the solution at 50°C to obtain the modified silica. Among them, the weight ratio of tetraethyl orthosilicate, sodium dodecylbenzenesulfonate, ethanol solution, ammonia water, and hexadecyltrimethoxysilane is 1:1:4:1:2; The preparation process of the chitosan modified solution is specifically as follows: Chitosan, a 25% sodium chloride solution by mass fraction, dimethyl sulfate, and a 20% sodium hydroxide solution by mass fraction are mixed in a weight ratio of 3:1:2:1, and stirred at 40°C for 2 h to obtain the chitosan modified solution.

[0021] A cashmere blended yarn is prepared by the above-mentioned preparation process. Example 3:

[0022] A preparation process of a cashmere blended yarn includes the following steps: Pre-treat the cashmere fibers and polyester fibers separately: The pre-treatment of cashmere fibers includes: nano-modification: soak the cashmere fibers in a polyurethane nano-solution for 20 h; bridging modification: soak the nano-modified cashmere fibers in a chitosan modification solution for 20 h; The pre-treatment of polyester fibers includes: soak the polyester fibers in a polyurethane nano-solution for 20 h; Feed the pre-treated cashmere fibers and polyester fibers into a cotton mixing machine according to a weight ratio of 2:1, and mix them through the cotton feeding curtain to obtain a mixed fiber material; Perform open carding → wool combing → gilling → combing on the mixed fiber material to obtain a sliver; Perform front spinning gilling → roving → spinning → winding → doubling → twisting → steaming → winding into a finished yarn on the sliver to obtain a cashmere blended yarn.

[0023] Among them, the preparation process of the polyurethane nano-solution is specifically: dissolve modified silica and polyurethane in a mixed solvent of N, N-dimethylformamide and butyl acetate, wherein the weight ratio of modified silica, polyurethane, N, N-dimethylformamide and butyl acetate is 1:1:2:4, stir for 18 h to obtain a polyurethane nano-solution; The preparation process of modified silica is specifically: add tetraethyl orthosilicate and sodium dodecylbenzenesulfonate to an ethanol solution with a volume fraction of 50%, continue to add ammonia water and stir until it turns white, put it into an oven for hydrothermal reaction, wherein the temperature is set at 60 °C and the time is 2 h; after the reaction is completed, take it out, add hexadecyltrimethoxysilane, and then pour it into the oven for hydrothermal reaction, wherein the reaction temperature is 60 °C and the reaction time is 1 h; after the reaction is completed, dry the solution at 50 °C to obtain modified silica, wherein the weight ratio of tetraethyl orthosilicate, sodium dodecylbenzenesulfonate, ethanol solution, ammonia water and hexadecyltrimethoxysilane is 1:1:4:1:2; The preparation process of the chitosan modification solution is specifically: mix chitosan, a sodium chloride solution with a mass fraction of 25%, dimethyl sulfate and a sodium hydroxide solution with a mass fraction of 20% according to a weight ratio of 3:1:2:1, and stir and react at 40 °C for 1.5 h to obtain a chitosan modification solution.

[0024] A cashmere blended yarn is prepared by the above-mentioned preparation process. Comparative Example 1:

[0025] The preparation process of Comparative Example 1 is basically the same as that of Example 1, except that the cashmere fibers and polyester fibers are not pretreated. Specifically: A preparation process of a cashmere blended yarn includes the following steps: Feed cashmere fibers and polyester fibers into a cotton mixing machine according to a weight ratio of 2:1, and carry out cotton mixing through the cotton feeding curtain to obtain a mixed fiber material; Carry out opening and cleaning of cotton → wool carding → gilling → combing on the mixed fiber material to obtain a sliver; Carry out front spinning gilling → roving → spinning → winding → doubling → twisting → steaming → cone yarn on the sliver to obtain a cashmere blended yarn.

[0026] A cashmere blended yarn is prepared by the above preparation process.

[0027] Carry out spinning, warping, and weaving on Examples 1-3 and Comparative Example 1 to obtain corresponding fabrics. Perform performance tests on the blended yarns or fabrics obtained from Examples 1-3, commercially available Qingdao Bunte Fiber Co., Ltd., and Comparative Example 1 respectively. Test method: Breaking strength and elongation at break: Detect according to the standard of GB / T 3923.1-2013.

[0028] Tensile strength: Detect with reference to the standard of GB / T1447-2005.

[0029] The test results are shown in Table 1.

[0030] Table 1 Test data of the yarns or fabrics of Examples 1-3, Comparative Example 1, and commercially available ones

[0031] As can be seen from the above table, the pretreatment method of the present invention can prepare a cashmere blended yarn with excellent mechanical properties.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A preparation process of a cashmere blended yarn, characterized in that, It includes the following steps: Pre-treat the cashmere fibers and polyester fibers separately; Feed the pre-treated cashmere fibers and polyester fibers into a cotton mixing machine according to a weight ratio of 2:1, and mix them through the cotton conveying curtain to obtain a mixed fiber material; Carry out opening and cleaning of cotton → wool carding → gilling → combing on the mixed fiber material to obtain sliver; Carry out front spinning gilling → roving → spinning → winding → doubling → twisting → yarn steaming → cone yarn product on the sliver to obtain cashmere blended yarn.

2. The preparation process of the cashmere blended yarn as described in claim 1, characterized in that, The pre-treatment of the cashmere fibers includes: Nano modification: Immerse the cashmere fibers in a polyurethane nano solution for 12 - 24 h; Bridging modification: Immerse the nano-modified cashmere fibers in a chitosan modification solution for 12 - 24 h.

3. The preparation process of the cashmere blended yarn according to claim 2, characterized in that, The pre-treatment of the polyester fibers includes: Immerse the polyester fibers in a polyurethane nano solution for 12 - 24 h.

4. The preparation process of the cashmere blended yarn according to claim 3, characterized in that, The preparation process of the polyurethane nano solution is specifically as follows: Dissolve modified silica and polyurethane in a mixed solvent of N,N-dimethylformamide and butyl acetate, and stir for 12 - 24 h to obtain a polyurethane nano solution.

5. The preparation process of the cashmere blended yarn as claimed in claim 4, characterized in that, The weight ratio of the modified silica, polyurethane, N,N-dimethylformamide, and butyl acetate is 1:1:2:

4.

6. The preparation process of the cashmere blended yarn according to claim 5, characterized in that, The preparation process of the modified silica is specifically as follows: Add tetraethyl orthosilicate and sodium dodecylbenzenesulfonate to an ethanol solution with a volume fraction of 50%, continue to add ammonia water and stir until it turns white, then put it into an oven for hydrothermal reaction, where the temperature is set at 60 °C and the time is 2 h; after the reaction is completed, take it out, add hexadecyltrimethoxysilane, and then pour it into the oven for hydrothermal reaction, where the reaction temperature is 60 °C and the reaction time is 1 h; after the reaction is completed, dry the solution at 50 °C to obtain modified silica.

7. The preparation process of the cashmere blended yarn according to claim 6, characterized in that, The weight ratio of tetraethyl orthosilicate, sodium dodecylbenzenesulfonate, ethanol solution, ammonia water, and hexadecyltrimethoxysilane is 1:1:4:1:

2.

8. The preparation process of the cashmere blended yarn according to claim 7, characterized in that, The preparation process of the chitosan modification solution is specifically as follows: Mix chitosan, a sodium chloride solution with a mass fraction of 25%, dimethyl sulfate, and a sodium hydroxide solution with a mass fraction of 20%, and stir and react at 40 °C for 1 - 2 h to obtain a chitosan modification solution.

9. The preparation process of the cashmere blended yarn according to claim 8, characterized in that, The weight ratio of chitosan, sodium chloride solution, dimethyl sulfate, and sodium hydroxide solution is 3:1:2:

1.

10. A cashmere blended yarn, characterized in that, It is prepared by the preparation process described in any one of claims 1 to 9.

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