Soluble fiber wool fabric and preparation process thereof

Abstract

The invention discloses a soluble fiber wool fabric and a preparation process thereof. The soluble fiber wool fabric is prepared by blending and weaving soluble fibers and wool fibers, the soluble fiber is prepared by spinning modified polyvinyl alcohol; the modified polyvinyl alcohol has a structure as shown in the following formula A, m: n = (5-8): (90-95), and the weight-average molecular weight is 45000-65000. The soluble fiber wool fabric provided by the invention is prepared by preparing triethoxysilylpropylmaleamic acid grafted and modified polyvinyl alcohol, spinning the polyvinyl alcohol and blending and weaving the polyvinyl alcohol and wool fibers, and is based on amide groups grafted in the polyvinyl alcohol, multi-branched chain siloxane and a long-chain structure; according to the present invention, the compatibility between the polyvinyl alcohol and the wool fiber can be significantly improved, and the water resistance, the hardness and the density of the wool fiber can be improved, such that the prepared fabric is flat and light, has excellent water resistance and excellent thermal insulation ability, and can be widely used in the technical field of fiber textile. # imgabs0 #

Description

Technical Field

[0002] The present invention relates to the technical field of fiber textile, and particularly relates to a soluble fiber wool fabric and a preparation process thereof. Background Art

[0003] With the continuous development of technology, people's requirements for living standards are getting higher and higher, and at the same time, their environmental protection awareness is also constantly increasing. As a natural protein fiber, wool occupies an important position in the textile field due to its unique physical and chemical properties. Due to the excellent properties of wool itself, such as warmth retention, moisture absorption, and elasticity, it is widely used in high-grade clothing, home textiles, and industrial materials.

[0004] However, the scale structure on the surface of wool fibers is prone to the directional friction effect under humid and hot conditions, resulting in irreversible shrinkage, seriously affecting the durability and aesthetics of clothing. At the same time, its tensile strength is relatively low, and problems such as wear and pilling are likely to occur after long-term use. Therefore, it is necessary to further improve it to meet higher textile requirements.

[0005] Polyvinyl alcohol is a polymer with excellent properties and wide applications. The high-performance fibers prepared from it have excellent corrosion resistance, weather resistance, and good bonding properties with the substrate interface. It is the most promising material among synthetic fibers. As a new type of textile raw material, polyvinyl alcohol is widely used in industries such as textiles, medical treatment, packaging, and papermaking. By blending polyvinyl alcohol fibers with other fibers and dissolving the water-soluble fibers after textile processing, high-grade textiles with fine yarn numbers and strong water absorption can be obtained.

[0006] By blending water-soluble polyvinyl alcohol fibers with wool fibers to form a composite fiber material, the problems of poor durability, easy wear, and easy pilling of traditional wool fibers can be compensated for, and the mechanical properties of the wool fiber material can be further improved. At the same time, the biodegradable polyvinyl alcohol fibers can maintain the environmental friendliness of the wool fiber material. Therefore, the blended material of the two has wide applications.

[0007] However, in the prior art, there are polar differences between hydrophilic polyvinyl alcohol and the hydrophobic surface of wool fibers, and their compatibility is insufficient, resulting in the flatness and heat preservation ability of the prepared fiber material still needing to be improved. At the same time, the water resistance of polyvinyl alcohol is poor and cannot meet the durable demand for multiple washes. At the same time, high cross-linking degree of polyvinyl alcohol will increase the hardness and density of the fiber material, resulting in the stiffness of the prepared fabric and the deterioration of the hand feeling.

[0008] Therefore, there is an urgent need for a soluble fiber wool fabric that can improve the compatibility between polyvinyl alcohol and wool fibers, has excellent water resistance and heat preservation ability, and has appropriate hardness and density at present. Summary of the Invention

[0009] Objective of the Invention: Aiming at the defects of the prior art, the objective of the present invention is to provide a soluble fiber wool fabric that can improve the compatibility between polyvinyl alcohol and wool fibers, has excellent water resistance and heat preservation ability, and has appropriate hardness and density, as well as its preparation process.

[0010] Technical Solution: A soluble fiber wool fabric, which is prepared by blending and weaving soluble fibers and wool fibers; The soluble fiber is prepared by spinning modified polyvinyl alcohol; The modified polyvinyl alcohol has the structure shown in Formula A below: , wherein, m:n = (5 - 8):(90 - 95), and the weight average molecular weight is 45,000 - 65,000.

[0011] Furthermore, the modified polyvinyl alcohol is prepared by the following steps: (1) In a reactor, add polyvinyl alcohol and deionized water, heat to 80 - 95 °C, and stir until the polyvinyl alcohol is completely dissolved; (2) Add triethoxysilylpropyl maleamic acid to the reactor in step (1), stir and react for 6 - 8 hours, then stop heating, cool to room temperature, use acetone as the solvent, and obtain the modified polyvinyl alcohol after suction filtration, washing, and drying.

[0012] In the present invention, the polyvinyl alcohol is esterified and modified by triethoxysilylpropyl maleamic acid, so that an amide group structure is successfully introduced, which can form strong interactions with the keratin component containing a large number of amide bonds in wool through hydrogen bonds and polar matching, thereby significantly improving the compatibility between the modified polyvinyl alcohol and wool fibers, improving the stability and uniformity of the fabric structure, reducing the existence of pores and fractures, and improving its flatness and heat preservation ability.

[0013] Furthermore, the mass ratio of the polyvinyl alcohol to the triethoxysilylpropyl maleamic acid is 5:2 - 4.

[0014] Furthermore, the soluble fiber is prepared by the following steps: (1) Mix the modified polyvinyl alcohol, ethanol, sodium chloride, and deionized water to prepare an electrospinning solution; (2) Obtain primary fibers by electrospinning the electrospinning solution; (3) Preheat the primary fibers and then subject them to hot stretching and heat setting to obtain the soluble fiber.

[0015] Further, in the step (1), the mass ratio of the modified polyvinyl alcohol, ethanol, sodium chloride and deionized water is (8 - 12):(3 - 5):(0.2 - 0.5):(80 - 85); In the step (2), the temperature of the electrospinning is 20 - 30 °C, the relative humidity is 50 - 55%, the voltage is 20 - 30 KV, the injection speed is 0.5 - 5 mL / min, and the needle - plate distance is 18 - 22 cm; In the step (3), the temperature of the hot stretching is 200 - 230 °C, and the stretching multiple is 2 - 4 times; In the step (3), the temperature of the heat setting is 180 - 210 °C, and the time is 2 - 5 min.

[0016] Further, the breaking strength of the soluble fiber is 6 - 7 cN / dtex, and the elongation at break is 20 - 35%.

[0017] The preparation process of the soluble - fiber wool fabric according to any one of the above, comprises the following steps: (1) In a reactor, add the soluble fiber and water, heat to 80 - 95 °C, stir until the soluble fiber is completely dissolved, then add the wool fiber and the silane coupling agent, and stir - mix for 2 - 3 hours at 150 - 300 r / min, then cool, wash and dry to form a fiber mixture; (2) Card the fiber mixture and make it into roving under the conditions of a drafting multiple of 5 - 8 times and a twist of 50 - 70 turns / 10 cm, and then make it into yarn by the ring - spinning method; (3) Twist the yarn into a single - strand thread in a stranding machine, and then use it as the warp and weft, and use the warp - weft knitting method to weave it into fabric on a loom; (4) After the woven fabric is heat - set at a high temperature, it is then dried and set to make the soluble - fiber wool fabric.

[0018] By blending and knitting a small amount of soluble fiber in the wool fiber, the present invention can not only make up for the porosity and performance problems of a single material, but also its excellent tensile performance and softness can improve the processing performance of the fabric, so that it can still meet the performance requirements while maintaining a relatively low density of the material.

[0019] Further, in the step (1), the silane coupling agent is selected from one of 3 - aminopropyltriethoxysilane, N - β(aminoethyl)-γ - aminopropyltrimethoxysilane or diethylenetriaminepropyltrimethoxysilane.

[0020] In the present invention, by adding a silane coupling agent during the blending process of soluble fiber and wool fiber, one end of the silane coupling agent can react with the hydroxyl group in the modified polyvinyl alcohol through its siloxane group, and the other end's amino group can combine with the carboxyl group in wool keratin to form a bridging structure of modified polyvinyl alcohol - silane coupling agent - wool. Furthermore, the bonding strength between the soluble fiber and the wool fiber can be enhanced through chemical bonds, thereby improving the overall performance of the fabric.

[0021] Furthermore, in the step (1), the mass ratio of the soluble fiber, the wool fiber, and the silane coupling agent is (20 - 30):(70 - 80):(1.5 - 3); In the step (2), the yarn count of the ring spinning is 20 - 40 metric counts, the twist is 60 - 90 turns / 10 cm, the temperature is 20 - 30 °C, and the humidity is 60 - 70%; In the step (3), the warp density is 200 - 300 ends / 10 cm, and the weft density is 180 - 280 ends / 10 cm; In the step (4), the temperature of the high - temperature setting is 110 - 120 °C, the time is 20 - 30 s, the temperature of the drying and setting is 80 - 90 °C, and the time is 60 - 90 s.

[0022] Application of any of the above - mentioned soluble fiber wool fabrics in a suit; The suit is made through the following process: The soluble fiber wool fabric is subjected to fulling for 20 - 30 min at 35 - 40 °C and pH 5 - 6, and then ironed and cut to make the suit.

[0023] Beneficial effects: (1) The soluble fiber wool fabric provided by the present invention is prepared by graft - modifying polyvinyl alcohol with triethoxysilylpropyl maleamic acid, spinning it, and then blending and knitting it with wool fiber. Based on the grafted amide group, multi - branched siloxane, and long - chain structure in polyvinyl alcohol, it can not only significantly improve the compatibility between polyvinyl alcohol and wool fiber, but also improve its water resistance, hardness, and density. Furthermore, the resulting fabric is flat, lightweight, and has excellent water resistance and heat - preservation ability, making it widely applicable in the field of fiber textile technology.

[0024] (2) In the soluble fiber wool fabric provided by the present invention, by esterifying and modifying polyvinyl alcohol with triethoxysilylpropyl maleamic acid, an amide - group structure is successfully introduced, which can form strong interactions with the keratin component containing a large number of amide bonds in wool through hydrogen bonding and polar matching. Furthermore, the compatibility between the modified polyvinyl alcohol and the wool fiber is significantly improved, thereby improving the stability and uniformity of the fabric structure, reducing the presence of pores and fractures, and enhancing its flatness and heat - preservation ability.

[0025] (3) In the soluble fiber wool fabric provided by the present invention, polyvinyl alcohol is esterified and modified with triethoxysilylpropyl maleamic acid, so that a multi-branched siloxane and a side chain structure in the form of a long chain are successfully introduced. On the one hand, the multi-branched siloxane can crosslink with each other on the fiber surface to form a soft network structure, which can not only reduce the friction between fibers, improve the flatness and heat preservation ability of the fiber material, but also avoid the long-term contact of the internal water-soluble fibers with water during the washing process, and improve its water resistance; on the other hand, its long-chain structure has excellent flexibility and can penetrate into wool fibers more easily, enabling the soluble fibers and wool fibers to be physically entangled, further improving the tensile properties of the fabric, and at the same time reducing the hardness of the fiber material and improving the hand feeling of the fabric.

[0026] (4) In the soluble fiber wool fabric provided by the present invention, by adding a small amount of soluble fibers to the wool fibers for blended weaving, not only can the pore and performance problems of a single material be made up for, but also its excellent tensile properties and softness can improve the processing performance of the fabric, enabling it to meet the performance requirements while maintaining a relatively low density of the material.

[0027] (5) In the soluble fiber wool fabric provided by the present invention, the made suit can be not only fashionable, beautiful, light and warm by using the fulling process, but also the wool material and soluble fiber material in its composition can be biodegradable, which can meet the needs of people for living standards and environmental protection and has a wide application space. Specific Embodiments

[0028] The present invention will be described below in conjunction with specific implementation embodiments. It should be noted that the following examples are examples of the present invention, only for illustrating the present invention, and not for limiting the present invention. Other combinations and various improvements within the concept of the present invention can be made without departing from the gist or scope of the present invention.

[0029] The commercially available wool fabric was a pure wool fabric purchased from Wuxi Gardenia Textile Co., Ltd.; the CAS number of triethoxysilylpropyl maleamic acid was 33525-68-7; the polyvinyl alcohol was polyvinyl alcohol P752227 purchased from Aladdin Reagent.

[0030] Preparation of Modified Polyvinyl Alcohol-1 Modified polyvinyl alcohol-1 was prepared through the following steps: (1) In a three-necked flask equipped with an electric stirrer and a reflux condenser, 5 g of polyvinyl alcohol and 150 mL of deionized water were added, heated to 90 °C, and stirred until the polyvinyl alcohol was completely dissolved; (2) Add 3 g of triethoxysilylpropyl maleamic acid to the reactor in step (1), stir and react for 8 hours, then stop heating, cool to room temperature, use acetone as the solvent, and obtain the modified polyvinyl alcohol-1 after suction filtration, washing, and drying.

[0031] Preparation of Modified Polyvinyl Alcohol-2 Basically the same as the preparation of modified polyvinyl alcohol-1, the difference is that 3 g of triethoxysilylpropyl maleamic acid is changed to 1 g of lactic acid.

[0032] Example 1 The soluble fiber is prepared through the following steps: (1) Mix modified polyvinyl alcohol-1, ethanol, sodium chloride, and deionized water in a mass ratio of 10:3:0.3:80 to make an electrospinning solution; (2) Obtain the as-spun fiber by electrospinning the electrospinning solution. The temperature of electrospinning is 25°C, the relative humidity is 50%, the voltage is 25 KV, the injection speed is 3 mL / min, and the needle-plate distance is 20 cm; (3) Preheat the as-spun fiber and then perform hot stretching at a temperature of 220°C and a draw ratio of 3 times and heat setting at a temperature of 190°C for 3 min to obtain the soluble fiber; The soluble fiber wool fabric is prepared through the following steps: (1) By weight, add 2 parts of soluble fiber and 100 parts of water to the reactor, heat to 90°C, stir until the soluble fiber is completely dissolved, then add 8 parts of wool fiber and 0.2 part of 3-aminopropyltriethoxysilane, stir and mix at 300 r / min for 2 hours, then cool, wash, and dry to form a fiber mixture; (2) Card the fiber mixture and make it into roving under the conditions of a draft multiple of 6 times and a twist of 59 turns / 10 cm, and then make it into yarn through ring spinning; The yarn count of the ring-spun yarn is 30 metric counts, the twist is 70 turns / 10 cm, the temperature is 25°C, and the humidity is 60%; (3) Twist the yarn into a single-strand thread in a stranding machine, and then use it as the warp and weft, and use the warp and weft weaving method to weave it into fabric on the loom; The warp density is 260 ends / 10 cm, and the weft density is 230 picks / 10 cm; (4) After high-temperature setting the woven fabric, then perform drying and setting to obtain the soluble fiber wool fabric; The temperature of high-temperature setting is 120°C, the time is 30 s, the temperature of drying and setting is 80°C, and the time is 80 s.

[0033] Example 2 Basically the same as Example 1, the difference is that in the preparation of soluble fiber, the mass ratio of modified polyvinyl alcohol-1, ethanol, sodium chloride and deionized water is changed to 8:5:0.2:85.

[0034] Example 3 Basically the same as Example 1, the difference is that in the preparation of soluble fiber wool fabric, the soluble fiber is changed to 3 parts and the wool fiber is changed to 7 parts.

[0035] Comparative Example 1 Commercially available wool fabric.

[0036] Comparative Example 2 Basically the same as Example 1, the difference is that modified polyvinyl alcohol-1 is changed to an equal amount of polyvinyl alcohol.

[0037] Comparative Example 3 Basically the same as Example 1, the difference is that modified polyvinyl alcohol-1 is changed to an equal amount of modified polyvinyl alcohol-2.

[0038] Comparative Example 4 Basically the same as Example 1, the difference is that 3-aminopropyltriethoxysilane is changed to an equal amount of water.

[0039] Performance Test Tensile strength detection: According to the detection standard of GB / T 3916-2013 "Determination of Breaking Strength and Elongation at Break of Single Yarn in Textile Wound Yarn", the breaking strength-1 of the products of Examples 1-3 and Comparative Examples 1-4 was detected.

[0040] Water resistance detection: After washing the products of Examples 1-3 and Comparative Examples 1-4 50 times with water, the breaking strength-2 was detected again according to the method of tensile strength detection.

[0041] Density detection: The gram weights of the products of Examples 1-3 and Comparative Examples 1-4 were detected respectively.

[0042] The detection results are shown in Table 1 below: According to the comparison of the detection results of Examples 1-3 and Comparative Example 1, it can be seen that the soluble fiber wool fabric provided by the present invention has stronger mechanical properties, water resistance and relatively light density than the wool fabric in the prior art, and can be widely used in the field of fiber textile technology.

[0043] According to the comparison of the test results of Examples 1-3 and Comparative Examples 2-3, it can be seen that the soluble fiber wool fabric provided by the present invention significantly improves the compatibility and bonding strength between the soluble fiber and the wool fiber through the esterification modification of polyvinyl alcohol. Based on the grafted amide group, siloxane and long-chain structure, the mechanical strength of the fabric can be improved, and a silane network structure can be formed on its surface to improve the water resistance of the fabric, so that it has more excellent mechanical strength, water resistance and light density than the polyvinyl alcohol wool blended fabric in the prior art.

[0044] According to the comparison of the test results of Examples 1-3 and Comparative Example 4, it can be seen that adding a silane coupling agent during the blending process of the soluble fiber wool fabric provided by the present invention can form a bridging structure, and then enhance the bonding strength between the soluble fiber and the wool fiber through chemical bonds, thereby improving the mechanical strength of the fabric.

[0045] Detection of hand feeling and heat preservation ability: The hand feeling and clo value of the products of Examples 1-3 and Comparative Examples 1-4 were detected respectively.

[0046] The test results are shown in Table 2 below: According to the comparison of the test results of Examples 1-3 and Comparative Example 1, it can be seen that the soluble fiber wool fabric provided by the present invention has more excellent heat preservation ability than the wool fabric in the prior art, and the hand feeling is flat and soft. The suit made of the soluble fiber wool fabric can have the characteristics of being fashionable and beautiful and light and warm.

[0047] According to the comparison of the test results of Examples 1-3 and Comparative Examples 2-3, it can be seen that the soluble fiber wool fabric provided by the present invention optimizes the overall structure of the fiber through the esterification modification of polyvinyl alcohol. Based on the grafted amide group, siloxane and long-chain structure, the flatness and heat preservation ability of the fabric made are improved, so that it has more excellent hand feeling and heat preservation performance than the polyvinyl alcohol wool blended fabric in the prior art.

[0048] According to the comparison of the test results of Examples 1-3 and Comparative Example 4, it can be seen that adding a silane coupling agent during the blending process of the soluble fiber wool fabric provided by the present invention can improve the bonding strength between the soluble fiber and the wool fiber, thereby improving the hand feeling and heat preservation performance of the fabric.

[0049] The above embodiments are only for explaining the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A soluble fiber wool fabric, characterized in that, The soluble fiber wool fabric is prepared by blending and knitting soluble fiber and wool fiber; The soluble fiber is prepared by spinning modified polyvinyl alcohol; The modified polyvinyl alcohol has the structure shown in Formula A below: ， Wherein, m:n = (5-8):(90-95), and the weight average molecular weight is 45000-65000.

2. The soluble fiber wool fabric according to claim 1, wherein The modified polyvinyl alcohol is prepared by the following steps: (1) In a reactor, add polyvinyl alcohol and deionized water, heat to 80-95 °C, and stir until the polyvinyl alcohol is completely dissolved; (2) Add triethoxysilylpropyl maleamic acid to the reactor in step (1), stir and react for 6-8 hours, then stop heating, cool to room temperature, use acetone as the solvent, and obtain the modified polyvinyl alcohol after filtration, washing and drying.

3. The soluble fiber wool fabric according to claim 2, wherein, The mass ratio of the polyvinyl alcohol to the triethoxysilylpropyl maleamic acid is 5:2-4.

4. The soluble fiber wool fabric according to claim 1, characterized in that, The soluble fiber is prepared by the following steps: (1) Mix the modified polyvinyl alcohol, ethanol, sodium chloride and deionized water to make an electrospinning solution; (2) Prepare the as-spun fiber by electrospinning the electrospinning solution; (3) Preheat the as-spun fiber and then make the soluble fiber through hot stretching and heat setting.

5. The soluble fiber wool fabric according to claim 4, characterized in that, In step (1), the mass ratio of the modified polyvinyl alcohol, ethanol, sodium chloride and deionized water is (8-12):(3-5):(0.2-0.5):(80-85); In step (2), the temperature of electrospinning is 20-30 °C, the relative humidity is 50-55%, the voltage is 20-30 KV, the injection speed is 0.5-5 mL / min, and the needle-plate distance is 18-22 cm; In step (3), the temperature of hot stretching is 200-230 °C, and the stretching ratio is 2-4 times; In step (3), the temperature of heat setting is 180-210 °C, and the time is 2-5 min.

6. The soluble fiber wool fabric according to claim 1, wherein The breaking strength of the soluble fiber is 6-7 cN / dtex, and the elongation at break is 20-35%.

7. The preparation process of the soluble fiber wool fabric according to any one of claims 1-6, characterized in that, Including the following steps: (1) In a reactor, add the soluble fiber and water, heat to 80-95 °C, stir until the soluble fiber is completely dissolved, then add the wool fiber and the silane coupling agent, stir and mix at 150-300 r / min for 2-3 hours, and then cool, wash and dry to form a fiber mixture; (2) Card the fiber mixture and make it into roving under the conditions of a drafting multiple of 5-8 times and a twist of 50-70 twists / 10 cm, and then make it into yarn by ring spinning; (3) Twist the yarn into a single-strand thread in a stranding machine, and then use it as the warp and weft, and use the warp and weft knitting method to weave it into fabric on a loom; (4) After high-temperature setting of the woven fabric, then carry out drying and setting to make the soluble fiber wool fabric.

8. The preparation process of the soluble fiber wool fabric according to claim 7, characterized in that, In step (1), the silane coupling agent is selected from one of 3-aminopropyltriethoxysilane, N-β(aminoethyl)-γ-aminopropyltrimethoxysilane or diethylenetriaminepropyltrimethoxysilane.

9. The preparation process of the soluble fiber wool fabric according to claim 7, characterized in that, In step (1), the mass ratio of the soluble fiber, wool fiber and silane coupling agent is (20-30):(70-80):(1.5-3); In the step (2), the yarn count of the ring spinning is 20 - 40 metric counts, the twist is 60 - 90 twists / 10 cm, the temperature is 20 - 30 °C, and the humidity is 60 - 70%; In the step (3), the warp density is 200 - 300 ends / 10 cm, and the weft density is 180 - 280 ends / 10 cm; In the step (4), the temperature of the high-temperature setting is 110 - 120 °C, the time is 20 - 30 s, the temperature of the drying and setting is 80 - 90 °C, and the time is 60 - 90 s.

10. Application of the soluble fiber wool fabric according to any one of claims 1 - 6 in a suit; The suit is made by the following process: The soluble fiber wool fabric is subjected to fulling for 20 - 30 min at 35 - 40 °C and pH 5 - 6, and then ironed and cut to make a suit.

Images