A preparation method of a novel three-proof fancy yarn for sofa

Abstract

The invention discloses a novel preparation process of three-proof fancy yarn for sofas. On the traditional polyester / polypropylene chenille yarn, polypropylene hot-melt wire is added and twisted in the wire core. In the subsequent preparation process, the prepared yarn is subjected to high-temperature treatment, and the polypropylene hot-melt wire can be melted. After melting, the external fluff can be adhered to increase the wear resistance of the yarn. In order to increase the three-proof performance of the yarn, the silicon-fluorine polymer heptadecafluorodecyltrimethoxysilane is attached to the prepared fancy yarn. Fluorine-containing silicon polymer as a coating can reduce the surface energy of the material, so that the material obtains waterproof, oil-proof and anti-fouling properties. The characteristics of the present invention are that the wear resistance of the yarn is increased by adding hot-melt wire, increasing the number of core yarns of the chenille fancy yarn and allocating a suitable spinning twist. The new coating method is used to provide adhesion and mechanical strength of the silicon-fluorine copolymer while also having biocompatibility. Therefore, the present invention is suitable for preparing sofa fabrics.

Description

Technical Field

[0001] The invention relates to a preparation method of a novel three-proof fancy yarn for sofas, belonging to the technical field of textile fabric processing. Background Art

[0002] With the development of the economy and the continuous improvement of people's living standards, people's demand for fabrics is increasing. For example, the requirements for sofa fabrics are that they must be wear-resistant and waterproof, oil-proof and anti-fouling. Heptadecafluorodecyltrimethoxysilane is a fluorosilicone copolymer. Applying it as a coating on the surface of yarn or fabric can reduce the surface energy, so that the target raw material has characteristics such as water-repellent and oil-repellent. Since the target fiber surface has fewer active groups, heptadecafluorodecyltrimethoxysilane has less adhesion when it is directly applied as a coating. Therefore, the yarn surface needs to be activated. Common methods for increasing surface active groups include plasma treatment and alkaline etching, but these two methods will cause physical damage to the yarn surface, thereby affecting the wear resistance of the yarn.

[0003] The chemical name of dopamine is 4-(2-ethylamino)-benzene-1,2-diphenol, a biological neurotransmitter that can undergo self-polymerization in an oxygen-containing alkaline aqueous solution, and utilize covalent and non-covalent bonds to generate a polydopamine coating with extremely strong adhesion on the surface of the material. This coating broadens the application range of the material.

[0004] China's application number is CN113278358B, a method for preparing a super-hydrophobic coating based on polydopamine self-assembly, by dissolving dopamine hydrochloride and nano zero-valent iron in trishydroxymethylaminomethane-hydrochloric acid buffer to obtain a mixed solution; the molar concentrations of dopamine hydrochloride and nano zero-valent iron in the mixed solution are 1-50mM; at room temperature, the material to be coated is immersed in the mixed solution so that the two are fully contacted; the material obtained after step S2 is immersed is taken out, cleaned and dried; the material is immersed in a low surface energy modifier so that the two are fully contacted, and after cleaning and drying, a super-hydrophobic coating based on polydopamine self-assembly is obtained on the surface of the material to be coated. The super-hydrophobic coating prepared by the method can reach a static water contact angle of up to 160.5°, and a minimum rolling angle of less than 1°, but it uses complex reagents, and there may be many inappropriate places when applied to yarn or fabric. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a preparation method of a novel three-proof fancy yarn for sofas, so that the product has better wear resistance, waterproof and oil resistance, and air permeability.

[0006] The first object of the present invention is to provide a method for preparing a novel three-proof fancy yarn for sofas, comprising the following steps:

[0007] S1: Use polyester as core yarn, polypropylene as feather yarn, and add hot melt yarn to spin into yarn;

[0008] S2: The yarn is subjected to high temperature treatment to melt the hot melt and consolidate the feather yarn;

[0009] S3: dissolving dopamine in a tris(hydroxymethyl)aminomethane buffer solution (pH=8.5), immersing the yarn prepared in the above step in the dopamine buffer solution for a period of time, then taking it out, rinsing it, and drying it to obtain the polydopamine-coated yarn;

[0010] S4: grafting heptadecafluorodecyltrimethoxysilane onto the yarn coated with polydopamine to form a fluorosilicone polymer antifouling coating, and drying to prepare a three-proof fancy yarn for sofas;

[0011] In the step S4, a solution is prepared by adding 1.7-2.1g of heptadecafluorodecyltrimethoxysilane and 1.0-1.4g of dibutyltin dilaurate per 40mL of xylene, and the fancy yarn obtained in step S3 is immersed in the above solution to graft heptadecafluorodecyltrimethoxysilane onto the polydopamine-coated yarn to form a fluorosilicone polymer antifouling coating. In one embodiment, the fineness of the core yarn polyester in step S1 is 110-150D, the number of fiber roots is 60-65F, the fineness of the feather yarn polypropylene is 80-100D, and the hot melt is a polypropylene hot melt, which can be melted at a temperature higher than 120°C.

[0012] In one embodiment, in step S1, fancy yarn is prepared using a spinning machine, and the process is: conveying the core yarn → introducing the feather yarn → twisting the feather yarn → looping the feather yarn → cutting the feather yarn → winding → steaming the yarn; wherein the twist coefficient of the core yarn is 370-380, and the twist direction is Z twist.

[0013] In one embodiment, in step S2, the hot melting temperature is between 130° C. and 135° C., and the hot melting time is 40 seconds.

[0014] In one embodiment, in step S3, the concentration of dopamine is 2-6 g / L.

[0015] In one embodiment, the immersion time in step S3 is 2 hours and the drying temperature is 60°C.

[0016] In one embodiment, in step S4, the reaction time is 2 hours and the reaction temperature is 80-90°C.

[0017] The second object of the present invention is to provide a novel three-proof fancy yarn for sofas.

[0018] Advantages and effects of the present invention:

[0019] 1. The abrasion resistance of yarn is increased by adding polypropylene hot melt wire, increasing the number of core yarns of fancy yarn and adjusting the appropriate spinning twist, and the abrasion resistance rate reaches more than 97.5%;

[0020] 2. Dopamine polymerization was selected as the active treatment method, and the grafting rate reached more than 65.5%;

[0021] 3. The three-proof fancy yarn for sofas prepared by the present invention has a water repellency level of 5 before washing and 4 after washing 5 times; an air permeability of 55.21% before washing and 49.35% after washing 5 times; an oil resistance level of excellent before washing and still excellent after washing 5 times. DETAILED DESCRIPTION

[0022] Embodiment 1:

[0023] A method for preparing a three-proof fancy yarn for a sofa comprises the following steps:

[0024] S1: Use polyester (fineness is 120D) as core yarn, the number of core yarn is 60F, polypropylene (fineness is 85D) as feather yarn, add polypropylene hot melt yarn to spin into yarn; core yarn conveying → feather yarn introduction → feather yarn twisting → feather yarn

[0025] Loop → cutting of feather yarn → winding → steaming yarn; among them, the twist coefficient of the core yarn is 370, and the twist direction is Z twist;

[0026] S2: subjecting the yarn to high temperature treatment, the temperature is 130°C, the hot melting time is 40s, so that the hot melt wire melts and consolidates the feather yarn;

[0027] S3: 2 g of dopamine was dissolved in 50 ml of tris(hydroxymethyl)aminomethane buffer solution (pH=8.5), the yarn prepared in the above step was immersed in the dopamine buffer solution for a period of time, then taken out and rinsed with deionized water until constant weight was reached.

[0028] The polydopamine-coated yarn was obtained by drying in a vacuum oven for 24 h;

[0029] S4: Dissolve 1.7g of heptadecafluorodecyltrimethoxysilane in 40ml of xylene, add 1.2g of dibutyltin dilaurate, graft heptadecafluorodecyltrimethoxysilane on the polydopamine-coated yarn to form a fluorosilicone polymer antifouling coating, and dry to prepare a three-proof fancy yarn for sofas.

[0030] Embodiment 2:

[0031] A method for preparing a three-proof fancy yarn for a sofa comprises the following steps:

[0032] S1: Use polyester (fineness is 140D) as core yarn, the number of core yarn is 65F, polypropylene (fineness is 90D) as feather yarn, add polypropylene hot melt yarn to spin into yarn; core yarn conveying → feather yarn introduction → feather yarn twisting → feather yarn

[0033] Loop → cutting of feather yarn → winding → steaming yarn; among which, the twist coefficient of the core yarn is 380, and the twist direction is Z twist;

[0034] S2: subjecting the yarn to high temperature treatment, the temperature is 135°C, the hot melting time is 40s, so that the hot melt wire melts and consolidates the feather yarn;

[0035] S3: 3 g of dopamine was dissolved in 50 ml of tris(hydroxymethyl)aminomethane buffer solution (pH=8.5), the yarn prepared in the above step was immersed in the dopamine buffer solution for a period of time, then taken out and rinsed with deionized water until constant weight was reached.

[0036] The polydopamine-coated yarn was obtained by drying in a vacuum oven for 24 h;

[0037] S4: Dissolve 1.7g of heptadecafluorodecyltrimethoxysilane in 40ml of xylene, add 1.2g of dibutyltin dilaurate, graft heptadecafluorodecyltrimethoxysilane on the polydopamine-coated yarn to form a fluorosilicone polymer antifouling coating, and dry to prepare a three-proof fancy yarn for sofas.

[0038] Optimization example 1: The influence of hot melt conditions on the wear resistance of three-proof fancy yarn for sofas

[0039] Except for changing the hot-melt temperature and hot-melt time in step S2, the other steps are the same as those in Example 1, and the three-proof fancy yarn for sofa is prepared.

[0040] The Y731 type cohesion tester was used to test the wear resistance of the yarn before and after adding the hot melt and the yarn treated at different temperatures in S2, and the wear rate before and after the hot melt was compared. The test results are shown in Table 1:

[0041] Table 1

[0042]

[0043] It can be seen from Table 1 that the addition of polypropylene hot melt wire can play a positive role in the wear resistance of the yarn. With the increase of the hot melt temperature, the wear resistance rate shows a trend of first increasing and then decreasing. When the hot melt temperature is 130-135°C and the hot melt time is 40s, the increased wear rate reaches more than 97.5%.

[0044] Optimization example 2: The influence of the number of core yarns on the wear resistance of three-proof fancy yarn for sofas

[0045] Except for changing the number of core yarns in step S1, the other steps are the same as those in Example 1, and the three-proof fancy yarn for sofa is prepared.

[0046] The Y731 type cohesion tester was used to test the wear resistance of the yarns before and after adding the hot melt and with different numbers of core yarns in S1, and the wear rate was compared. The test results are shown in Table 2:

[0047] Table 2

[0048] Number of core yarns (F) Wear times (times) Grinding rate (%) 55 40 60 (Example 1) 82 105 65 80 100 70 70 75 75 64 60 80 60 50

[0049] It can be seen from Table 2 that when the number of core yarns is 60 to 65F, the abrasion increase rate reaches more than 100%.

[0050] Optimization Example 3: Effects of different functional modification treatments on the surface activation properties of three-proof fancy yarn for sofas

[0051] The yarn obtained in step S2 of Example 1 was spun into a fabric, and the fabric was washed three times with alcohol, acetone and deionized water to remove surface impurities, and dried in a vacuum oven at 60° C. for later use.

[0052] The plasma reaction device consists of a radio frequency power supply, a matching device, a reaction vessel and a vacuum system. The dried sample is placed in a closed reactor and evacuated, and the air in the reaction vessel is replaced with MAH gas, the MAH vapor pressure is maintained at 5Pa, and a plasma treatment of 20W power is used for 5 minutes.

[0053] The alkaline etching process is as follows: the dried sample is treated with sodium hydroxide at a concentration of 30 g / L, for 30 min at a temperature of 90°C, washed three times with deionized water after treatment, and vacuum dried in a vacuum oven at 60°C for 12 h.

[0054] 2 g of dopamine was dissolved in 50 ml of tris(hydroxymethylaminomethane) buffer solution (pH=8.5), and the dried fabric was immersed in the dopamine buffer solution for a period of time, then taken out, rinsed with deionized water until constant weight was reached, and dried in a vacuum oven for 24 hours to obtain a polydopamine-coated fabric.

[0055] The water contact angle of the fabric was tested using a contact angle tester, with a water drop size of 3 μL. The fabric was laid flat on a glass slide with double-sided tape and placed on the contact angle meter measuring table. The size of the water drop and the release speed were kept constant, and the dynamic contact angles of different fabrics were measured and recorded. Each sample was measured three times and the average value was calculated. The results are shown in Table 3.

[0056] Table 3

[0057] Activation treatment method Water contact angle (°) none 141 Plasma treatment 112 Alkaline etching 124 Dopamine polymerization 101

[0058] As shown in Table 3, the fabric treated with dopamine polymerization has the smallest contact angle of 101°, which proves that it has more surface hydroxyl groups. Therefore, the use of dopamine polymerization as an active treatment method is conducive to the subsequent grafting of heptadecafluorodecyltrimethoxysilane.

[0059] Optimization Example 4: Effect of different reaction conditions on the grafting rate of three-proof fancy yarn for sofas

[0060] Except for changing the amount of heptadecafluorodecyltrimethoxysilane and dibutyltin dilaurate, reaction time and reaction temperature in step S4, other experimental steps are consistent with Example 1. The results are shown in Table 4.

[0061] Table 4

[0062]

[0063] As shown in Table 4, the grafting rate of heptadecafluorodecyltrimethoxysilane increases with the increase of reaction time and reaction temperature, and when the amounts of heptadecafluorodecyltrimethoxysilane and dibutyltin dilaurate are 1.7 g and 1.2 g respectively, the reaction time is 2 h, and the reaction temperature is 80-90° C., the grafting rate reaches more than 65.5%.

[0064] Optimization Example 5: Effects of different grafting rates on the three-proof properties of three-proof fancy yarn for sofas

[0065] The three-proof fancy yarn for sofas prepared in Optimization Example 4 with grafting rates of 22.1%, 39.5%, 41.5% and 66.8% were spun into fabrics, which were washed three times with alcohol, acetone and deionized water to remove surface impurities and dried in a vacuum oven at 60°C for use in the three-proof performance evaluation.

[0066] The waterproof performance is tested in accordance with GB 5554-1997 "Waterproofing Test Method for Determination of Waterproofness of Waterproof Agents" and is tested using the LLY-13 water spray tester. The standard wetting card scores are as follows: Level 1 (the surface is completely wetted), Level 2 (half of the surface is wetted), Level 3 (only a small discontinuous area of ​​the surface is wetted), Level 4 (the surface is not wetted, but there are water drops on the surface), Level 5 (the surface is not wetted and there are no water drops on the surface).

[0067] The air permeability is tested in accordance with GB / T 5453-1997 “Determination of Air Permeability of Textile Fabrics” using a YG461E digital air permeability meter with a nozzle diameter of 4 mm.

[0068] Oil-proof performance test: drop oil agent (n-hexadecane, 98%) on the fabric to be tested, then immerse the fabric in cold water, and carefully observe the process of oil droplets falling from the fabric. If the oil droplets are scattered in the form of small spheres on the fabric, and the small oil droplets completely detach from the fabric surface and float to the water surface after being put into water, it means that the oil repellency is excellent; if the small oil droplets do not fall off the fabric when in water, it means that the oil repellency is good; if the oil is emulsified on the fabric, it means that the oil repellency is medium; if the oil on the fabric cannot be completely removed, the oil repellency is poor.

[0069] The three-proof effects are shown in Table 5.

[0070] Table 5

[0071]

[0072] As shown in Table 5, the higher the grafting rate, the better the three-proof effects. When the grafting rate reaches 66.8%, the water repellency grade reaches 5 before washing and reaches 4 after washing 5 times; the air permeability reaches 55.21% before washing and reaches 49.35% after washing 5 times; the oil repellency grade reaches excellent before washing and still reaches excellent after washing 5 times.

[0073] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A method for preparing a three-proof fancy yarn for sofa, characterized in that: The steps include: S1: Use polyester as core yarn, polypropylene as feather yarn, and add hot melt yarn to spin into yarn; S2: The yarn is subjected to high temperature treatment to melt the hot melt and consolidate the feather yarn; S3: dissolving dopamine in a tris(hydroxymethyl)aminomethane) buffer solution, immersing the yarn prepared in the above step in the dopamine buffer solution for a period of time, then taking it out, rinsing it, and drying it to obtain the polydopamine-coated yarn; S4: grafting heptadecafluorodecyltrimethoxysilane onto the yarn coated with polydopamine to form a fluorosilicone polymer antifouling coating, and drying to prepare a three-proof fancy yarn for sofas; in the step S4, a solution is prepared according to a ratio of 1.7-2.1 g heptadecafluorodecyltrimethoxysilane and 1.0-1.4 g dibutyltin dilaurate per 40 mL of xylene, and the fancy yarn obtained in step S3 is immersed in the above solution to graft heptadecafluorodecyltrimethoxysilane onto the yarn coated with polydopamine to form a fluorosilicone polymer antifouling coating; Among them, the reaction time is 2h and the reaction temperature is 80~90℃.

2. The method according to claim 1, characterized in that In the step S1, the fineness of the core yarn polyester is 110-150 D, the number of fiber roots is 60-65 F, the fineness of the feather yarn polypropylene is 80-100 D, and the hot-melt yarn is polypropylene hot-melt yarn.

3. The method according to claim 1, characterized in that In step S2, the hot melting temperature is 130-135° C., and the hot melting time is 40 seconds.

4. The method according to claim 1, characterized in that In step S3, the concentration of dopamine is 2-6 g / L.

5. The method according to claim 1, characterized in that In step S3, the immersion time is 2 h and the drying temperature is 60°C.

6. The method according to claim 1, characterized in that In the step S1, a spinning machine is used to prepare fancy yarn, and the process is: conveying the core yarn → introducing the feather yarn → twisting the feather yarn → looping the feather yarn → cutting the feather yarn → winding → steaming the yarn; wherein the twist coefficient of the core yarn is 370-380, and the twist direction is Z twist.

7. The three-proof fancy yarn for sofa prepared according to the method according to any one of claims 1 to 6.

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