A method for producing an antibacterial modified polyester fiber blended woven fabric

Abstract

The application relates to the technical field of antibacterial fabric, in particular to a preparation method of antibacterial modified polyester fiber blended woven fabric. The preparation method of the antibacterial modified polyester fiber blended woven fabric is to obtain the fabric by blending antibacterial modified polyester fiber and fine cotton fiber to obtain blended yarn and then through a weaving process, and the antibacterial modified polyester fiber is obtained by melt spinning processing of a mixture of antibacterial modified polyester and polyester chips. The antibacterial modified polyester fiber blended woven fabric has excellent bursting performance, the rating can reach 4.5 after 500 times of rubbing, has excellent antibacterial performance, and most importantly, the antibacterial performance can still be maintained at a relatively excellent level after multiple water washes.

Description

Technical Field

[0001] This invention relates to the field of antibacterial fabric technology, and in particular to a method for preparing an antibacterial modified polyester fiber blended woven fabric. Background Technology

[0002] With the significant improvement in living standards, people now demand more than just clothing that simply covers their bodies. They also have a greater need for special properties in clothing, such as comfort. The most common and popular properties now include UV protection, moisture-wicking and quick-drying, antibacterial properties, and windproof and warm properties for winter clothing.

[0003] Patent document CN201910794660.4 discloses a waterproof and UV-resistant textile fabric, comprising an outer layer, a middle layer, and an inner layer. The outer layer undergoes silicone plasma treatment and UV protection treatment, while the middle layer undergoes pore treatment and oxygen plasma treatment. The middle layer is a blend of acrylic and linen fibers. This invention produces a waterproof and UV-resistant textile fabric that, through special processes and fabric selection, simultaneously possesses moisture-proof, sun-proof, and waterproof / breathable functions.

[0004] With the continuous improvement of modern hygiene standards and people's increasing emphasis on health, antibacterial clothing is gradually entering the public eye. Patent document CN202011602592.6 discloses a method for preparing antibacterial knitted fabric. The method involves adding spandex to a blended yarn made of antibacterial polyester fiber and modal fiber to obtain a knitted single-sided fabric, which then undergoes pre-setting, pretreatment, dyeing, dehydration, splitting, drying, setting, and pre-shrinking to obtain the antibacterial knitted fabric. The antibacterial knitted fabric includes the following components: antibacterial polyester fiber, modal fiber, and spandex. This invention utilizes coordination technology to firmly control Ag+ within the polyester fiber, thereby enhancing the antibacterial and deodorizing efficiency of the antibacterial agent and its permanence within the polyester fiber, improving the persistence of antibacterial properties, resulting in excellent performance and environmental friendliness. However, its process is complex and costly, hindering widespread adoption. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a method for preparing an antibacterial modified polyester fiber blended woven fabric, so as to provide a fabric with good antibacterial properties.

[0006] To achieve the above objectives, the present invention provides a method for preparing an antibacterial modified polyester fiber blended woven fabric. The antibacterial modified polyester fiber blended woven fabric is obtained by blending antibacterial modified polyester fiber and fine cotton fiber to obtain blended yarn, which is then woven. The antibacterial modified polyester fiber is obtained by melt spinning a mixture of antibacterial modified polyester and polyester chips.

[0007] The preparation steps of the antibacterial modified polyester are as follows:

[0008] S1: Mix itaconic acid, 1,2-propanediol, hydroquinone and p-toluenesulfonic acid, heat to 160-170℃, reflux for 12-14h, extract, filter and rotary evaporate to obtain unsaturated polyester.

[0009] S2: Add unsaturated polyester to N,N-dimethylacetamide, add azobisisobutyronitrile under nitrogen atmosphere, heat to 70-80℃, add 4-vinylbenzyl chloride, stir and react for 16-20h, wash and dry to obtain benzyl chloride grafted polyester.

[0010] S3: Add benzyl chloride-grafted polyester to N-methylpyrrolidone and stir for 10-20 min. Then add pentamethyldivinyltriamine and stir at room temperature for 1-2 h. Then add iodooctadecane and continue stirring for 6-8 h. Rotary evaporate to obtain antibacterial modified polyester.

[0011] Preferably, the length of the fine cotton fiber is 35-40 mm and the fineness is 1.5-1.7 dtex.

[0012] Preferably, the blending ratio of the antibacterial modified polyester fiber and the fine cotton fiber is 20-35:65-80.

[0013] Preferably, the weight ratio of itaconic acid, 1,2-propanediol, hydroquinone and p-toluenesulfonic acid in step S1 is 120-140:80-90:1-1.1:1-1.1.

[0014] Preferably, the weight ratio of the unsaturated polyester, N,N-dimethylacetamide, azobisisobutyronitrile and 4-vinylchlorobenzyl chloride in step S2 is 3-4:50-60:0.1-0.3:5-10.

[0015] Preferably, the weight ratio of benzyl chloride-grafted polyester, N-methylpyrrolidone, pentamethyldivinyltriamine and iodooctadecane in step S3 is 1-5:30-40:0.3-0.8:0.5-1.

[0016] Preferably, the polyester chips are PET polyester chips.

[0017] Preferably, the specific preparation method of the antibacterial modified polyester fiber is as follows: antibacterial modified polyester and polyester chips are blended, and then the mixture is spun at 260-270℃ at a spinning speed of 3000m / min, and then stretched at a ratio of 1.5-2 times to obtain antibacterial modified polyester fiber.

[0018] Preferably, the weight ratio of the antibacterial modified polyester to polyester chips is 1-3:10.

[0019] Preferably, the density of the woven antibacterial modified polyester fiber blended woven fabric is 140-150 g / m³. 2 .

[0020] Preferably, the antibacterial modified polyester fiber blended woven fabric obtained by weaving is a plain knit fabric.

[0021] The beneficial effects of this invention are:

[0022] (1) The present invention modifies polyester by using pentamethyldivinyltriamine, thereby increasing the density of the crosslinking network and thus improving the bursting performance of the fabric. Furthermore, a large number of active sites are introduced into the crosslinking network, and a large number of cationic groups are introduced through subsequent quaternization treatment, thereby improving the antibacterial properties of the fabric.

[0023] (2) This invention modifies polyester with iodooctadecane, introducing hydrophobic long chains that are distributed in the crosslinking network, further improving the antibacterial and bursting properties of the fabric; most importantly, the fabric maintains its excellent antibacterial properties even after multiple washes.

[0024] (3) This invention modifies polyester by using iodooctadecane and pentamethyldivinyltriamine. While introducing cationic groups, hydrophobic long chains are also introduced. Both promote the improvement of the fabric’s antibacterial properties and bursting properties. The resulting fabric still maintains excellent antibacterial properties after multiple washes. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0026] The properties of the raw materials used in the embodiments of the present invention and the comparative examples are as follows: the length of the fine cotton fiber is 38 mm and the fineness is 1.6 dtex;

[0027] Example 1: A method for preparing an antibacterial modified polyester fiber blended woven fabric, the specific preparation steps are as follows:

[0028] (1) Mix 120g itaconic acid, 80g 1,2-propanediol, 1g hydroquinone and 1g p-toluenesulfonic acid, heat to 160℃, reflux for 12h, extract, filter and rotary evaporate to obtain unsaturated polyester.

[0029] (2) Add 3g of unsaturated polyester to 50g of N,N-dimethylacetamide, add 0.1g of azobisisobutyronitrile under nitrogen atmosphere, heat to 70℃, add 5g of 4-vinylbenzyl chloride, stir and react for 16-20h, wash, and vacuum dry at 80℃ for 24h to obtain benzyl chloride grafted polyester.

[0030] (3) Add 1g of benzyl chloride-grafted polyester to 30g of N-methylpyrrolidone, stir for 10min, then add 0.3g of pentamethyldivinyltriamine, stir and react at room temperature for 1h, then add 0.5g of iodooctadecane, continue stirring for 6h, and rotary evaporate to obtain antibacterial modified polyester.

[0031] (4) The antibacterial modified polyester and PET polyester chips are blended at a weight ratio of 1:10, and then the mixture is spun at 260°C at a spinning speed of 3000 m / min and then stretched at a ratio of 1.5 to obtain antibacterial modified polyester fiber.

[0032] (5) Antibacterial modified polyester fiber and fine cotton fiber were blended at a ratio of 20:80, and then woven using a WF-52CJD computerized flat knitting machine. After boiling, washing, and finishing, a density of 140 g / m³ was obtained. 2 Antibacterial modified polyester fiber blended woven fabric.

[0033] Example 2: A method for preparing an antibacterial modified polyester fiber blended woven fabric, the specific preparation steps are as follows:

[0034] (1) Mix 130g itaconic acid, 85g 1,2-propanediol, 1.05g hydroquinone and 1.05g p-toluenesulfonic acid, heat to 165℃, reflux for 13h, extract, filter, and rotary evaporate to obtain unsaturated polyester.

[0035] (2) 3.5g of unsaturated polyester was added to 55g of N,N-dimethylacetamide. Under a nitrogen atmosphere, 0.2g of azobisisobutyronitrile was added, the temperature was raised to 75℃, 7.5g of 4-vinylbenzyl chloride was added, the mixture was stirred and reacted for 18h, washed, and dried under vacuum at 80℃ for 24h to obtain benzyl chloride grafted polyester.

[0036] (3) Add 3g of benzyl chloride-grafted polyester to 35g of N-methylpyrrolidone, stir for 15min, then add 0.5g of pentamethyldivinyltriamine, stir and react at room temperature for 2h, then add 0.75g of iodooctadecane, continue stirring for 7h, and rotary evaporate to obtain antibacterial modified polyester.

[0037] (4) The antibacterial modified polyester and PET polyester chips were blended at a weight ratio of 2:10, and then the mixture was spun at 265°C at a spinning speed of 3000 m / min and stretched at 2 times to obtain antibacterial modified polyester fiber.

[0038] (5) Antibacterial modified polyester fiber and fine cotton fiber were blended at a ratio of 30:70, and then woven using a WF-52CJD computerized flat knitting machine. After boiling, washing, and finishing, a density of 150 g / m³ was obtained. 2 Antibacterial modified polyester fiber blended woven fabric.

[0039] Example 3: A method for preparing an antibacterial modified polyester fiber blended woven fabric, the specific preparation steps are as follows:

[0040] (1) Mix 135g itaconic acid, 88g 1,2-propanediol, 1.1g hydroquinone and 1.1g p-toluenesulfonic acid, heat to 170℃, reflux for 14h, extract, filter and rotary evaporate to obtain unsaturated polyester.

[0041] (2) Add 4g of unsaturated polyester to 55g of N,N-dimethylacetamide, add 0.2g of azobisisobutyronitrile under nitrogen atmosphere, heat to 75℃, add 8g of 4-vinylbenzyl chloride, stir and react for 19h, wash, and vacuum dry at 80℃ for 24h to obtain benzyl chloride grafted polyester.

[0042] (3) Add 4g of benzyl chloride-grafted polyester to 40g of N-methylpyrrolidone, stir for 18min, then add 0.6g of pentamethyldivinyltriamine, stir and react at room temperature for 2h, then add 1g of iodooctadecane, continue stirring for 8h, and rotary evaporate to obtain antibacterial modified polyester.

[0043] (4) The antibacterial modified polyester and PET polyester chips were blended at a weight ratio of 3:10, and then the mixture was spun at 270°C at a spinning speed of 3000 m / min and stretched at 2 times to obtain antibacterial modified polyester fiber.

[0044] (5) Antibacterial modified polyester fiber and fine cotton fiber were blended at a ratio of 25:75, and then woven using a WF-52CJD computerized flat knitting machine. After boiling, washing, and finishing, a density of 143 g / m³ was obtained. 2 Antibacterial modified polyester fiber blended woven fabric.

[0045] Example 4: A method for preparing an antibacterial modified polyester fiber blended woven fabric, the specific preparation steps are as follows:

[0046] (1) Mix 140g itaconic acid, 90g 1,2-propanediol, 1.1g hydroquinone and 1.1g p-toluenesulfonic acid, heat to 170℃, reflux for 14h, extract, filter, and rotary evaporate to obtain unsaturated polyester.

[0047] (2) Add 4g of unsaturated polyester to 60g of N,N-dimethylacetamide, add 0.3g of azobisisobutyronitrile under nitrogen atmosphere, heat to 80℃, add 10g of 4-vinylbenzyl chloride, stir and react for 20h, wash, and vacuum dry at 80℃ for 24h to obtain benzyl chloride grafted polyester.

[0048] (3) Add 5g of benzyl chloride-grafted polyester to 40g of N-methylpyrrolidone, stir for 20min, then add 0.8g of pentamethyldivinyltriamine, stir and react at room temperature for 2h, then add 1g of iodooctadecane, continue stirring for 8h, and rotary evaporate to obtain antibacterial modified polyester.

[0049] (4) The antibacterial modified polyester and PET polyester chips were blended at a weight ratio of 3:10, and then the mixture was spun at 270°C at a spinning speed of 3000 m / min and stretched at 2 times to obtain antibacterial modified polyester fiber.

[0050] (5) Antibacterial modified polyester fiber and fine cotton fiber were blended at a ratio of 35:65, and then woven using a WF-52CJD computerized flat knitting machine. After boiling, washing, and finishing, a density of 147 g / m³ was obtained. 2 Antibacterial modified polyester fiber blended woven fabric.

[0051] Comparative Example 1: A method for preparing an antibacterial polyester fiber blended woven fabric, the specific preparation steps of which are as follows:

[0052] (1) Mix 130g itaconic acid, 85g 1,2-propanediol, 1.05g hydroquinone and 1.05g p-toluenesulfonic acid, heat to 165℃, reflux for 13h, extract, filter, and rotary evaporate to obtain unsaturated polyester.

[0053] (2) 3.5g of unsaturated polyester was added to 55g of N,N-dimethylacetamide. Under a nitrogen atmosphere, 0.2g of azobisisobutyronitrile was added, the temperature was raised to 75℃, 7.5g of 4-vinylbenzyl chloride was added, the mixture was stirred and reacted for 18h, washed, and dried under vacuum at 80℃ for 24h to obtain benzyl chloride grafted polyester.

[0054] (3) Add 3g of benzyl chloride-grafted polyester to 35g of N-methylpyrrolidone, stir for 15min, then add 0.37g of tetramethylpropanediamine, stir and react at room temperature for 2h, then add 0.75g of iodooctadecane, continue stirring for 7h, and rotary evaporate to obtain antibacterial modified polyester.

[0055] (4) The antibacterial modified polyester and PET polyester chips were blended at a weight ratio of 2:10, and then the mixture was spun at 265°C at a spinning speed of 3000 m / min and stretched at 2 times to obtain antibacterial modified polyester fiber.

[0056] (5) Antibacterial modified polyester fiber and fine cotton fiber were blended at a ratio of 30:70, and then woven using a WF-52CJD computerized flat knitting machine. After boiling, washing, and finishing, a density of 150 g / m³ was obtained. 2 Antibacterial modified polyester fiber blended woven fabric.

[0057] Comparative Example 2: A method for preparing an antibacterial polyester fiber blended woven fabric, the specific preparation steps of which are as follows:

[0058] (1) Mix 130g itaconic acid, 85g 1,2-propanediol, 1.05g hydroquinone and 1.05g p-toluenesulfonic acid, heat to 165℃, reflux for 13h, extract, filter, and rotary evaporate to obtain unsaturated polyester.

[0059] (2) 3.5g of unsaturated polyester was added to 55g of N,N-dimethylacetamide. Under a nitrogen atmosphere, 0.2g of azobisisobutyronitrile was added, the temperature was raised to 75℃, 7.5g of 4-vinylbenzyl chloride was added, the mixture was stirred and reacted for 18h, washed, and dried under vacuum at 80℃ for 24h to obtain benzyl chloride grafted polyester.

[0060] (3) Add 3g of benzyl chloride-grafted polyester to 35g of N-methylpyrrolidone, stir for 15min, then add 0.5g of pentamethyldivinyltriamine, stir and react at room temperature for 2h, then add 0.31g of ethyl iodine, continue stirring for 7h, and rotary evaporate to obtain antibacterial modified polyester.

[0061] (4) The antibacterial modified polyester and PET polyester chips were blended at a weight ratio of 2:10, and then the mixture was spun at 265°C at a spinning speed of 3000 m / min and stretched at 2 times to obtain antibacterial modified polyester fiber.

[0062] (5) Antibacterial modified polyester fiber and fine cotton fiber were blended at a ratio of 30:70, and then woven using a WF-52CJD computerized flat knitting machine. After boiling, washing, and finishing, a density of 150 g / m³ was obtained. 2 Antibacterial modified polyester fiber blended woven fabric.

[0063] Comparative Example 3: A method for preparing an antibacterial polyester fiber blended woven fabric, the specific preparation steps of which are as follows:

[0064] (1) Mix 130g itaconic acid, 85g 1,2-propanediol, 1.05g hydroquinone and 1.05g p-toluenesulfonic acid, heat to 165℃, reflux for 13h, extract, filter, and rotary evaporate to obtain unsaturated polyester.

[0065] (2) 3.5g of unsaturated polyester was added to 55g of N,N-dimethylacetamide. Under a nitrogen atmosphere, 0.2g of azobisisobutyronitrile was added, the temperature was raised to 75℃, 7.5g of 4-vinylbenzyl chloride was added, the mixture was stirred and reacted for 18h, washed, and dried under vacuum at 80℃ for 24h to obtain benzyl chloride grafted polyester.

[0066] (3) Add 3g of benzyl chloride-grafted polyester to 35g of N-methylpyrrolidone, stir for 15min, then add 0.17g of trimethylamine, stir and react at room temperature for 2h, and then evaporate to obtain antibacterial modified polyester.

[0067] (4) The antibacterial modified polyester and PET polyester chips were blended at a weight ratio of 2:10, and then the mixture was spun at 265°C at a spinning speed of 3000 m / min and stretched at 2 times to obtain antibacterial modified polyester fiber.

[0068] (5) Antibacterial modified polyester fiber and fine cotton fiber were blended at a ratio of 30:70, and then woven using a WF-52CJD computerized flat knitting machine. After boiling, washing, and finishing, a density of 150 g / m³ was obtained. 2 Antibacterial modified polyester fiber blended woven fabric.

[0069] Performance testing

[0070] Bursting performance: According to GB / T 19976-2005 "Determination of bursting strength of textiles - steel ball method", the bursting performance of the samples obtained in the examples and comparative examples was tested using a YG031DC type ball bursting strength tester (manufactured by Quanzhou Meibang Instrument Co., Ltd.). The test results are shown in Table 1.

[0071] Anti-pilling performance: According to GB / T 4802.2-2008 "Textiles - Determination of pilling performance - Part 2: Modified Martindale method", the pilling performance of the samples obtained in the examples and comparative examples was tested using a YG502 fabric pilling tester (manufactured by Quanzhou Meibang Instrument Co., Ltd.). The test results are shown in Table 1.

[0072] Antibacterial properties: The samples obtained from the examples and comparative examples were cut into small pieces, and 0.1g of each sample was taken. According to GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Shaking method", the antibacterial properties of the samples obtained from the examples and comparative examples were tested using Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli as test bacteria. The test results are shown in Table 1. Subsequently, the samples obtained from the examples and comparative examples were washed with water 30 times, dried, and 0.1g of each sample was cut into small pieces for antibacterial property testing. The test results are shown in Table 1.

[0073] Table 1 Performance Test Results

[0074]

[0075] As can be seen from Examples 1-4 in Table 1, the fabric obtained by the preparation method of the antibacterial modified polyester fiber blended woven fabric of the present invention has good bursting performance and can still achieve a rating of 4.5 after 500 rubs; and has excellent antibacterial properties. Most importantly, it can still maintain relatively excellent antibacterial properties after multiple washes.

[0076] As can be seen from Table 1, Example 2 and Comparative Example 1, the present invention improves the density of the crosslinking network by modifying polyester with pentamethyldivinyltriamine, thereby improving the bursting performance of the fabric. Furthermore, a large number of active sites are introduced into the crosslinking network, and a large number of cationic groups are introduced through subsequent quaternization treatment, which improves the antibacterial properties of the fabric.

[0077] As can be seen from Table 1, Example 2 and Comparative Example 2, the present invention modifies polyester with iodooctadecane, introducing hydrophobic long chains that are distributed within the crosslinking network, thereby further improving the antibacterial properties and bursting properties of the fabric. Most importantly, the fabric maintains its excellent antibacterial properties even after multiple washes.

[0078] As can be seen from Table 1, Example 2 and Comparative Example 3, the present invention modifies polyester by using iodooctadecane and pentamethyldivinyltriamine. While introducing cationic groups, hydrophobic long chains are also introduced. Both promote the improvement of the fabric's antibacterial properties and bursting properties. The final fabric still maintains relatively excellent antibacterial properties after multiple washes.

[0079] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. A method for preparing an antibacterial modified polyester fiber blended woven fabric, characterized in that, The antibacterial modified polyester fiber blended woven fabric is made by blending antibacterial modified polyester fiber and fine cotton fiber to obtain blended yarn, and then weaving it; the antibacterial modified polyester fiber is obtained by melt spinning a mixture of antibacterial modified polyester and polyester chips. The preparation steps of the antibacterial modified polyester are as follows: S1: Mix itaconic acid, 1,2-propanediol, hydroquinone and p-toluenesulfonic acid, heat to 160-170℃, reflux for 12-14h, extract, filter and rotary evaporate to obtain unsaturated polyester. S2: Add unsaturated polyester to N,N-dimethylacetamide, add azobisisobutyronitrile under nitrogen atmosphere, heat to 70-80℃, add 4-vinylbenzyl chloride, stir and react for 16-20h, wash and dry to obtain benzyl chloride grafted polyester. S3: Add benzyl chloride-grafted polyester to N-methylpyrrolidone and stir for 10-20 min. Then add pentamethyldivinyltriamine and stir at room temperature for 1-2 h. Then add iodooctadecane and continue stirring for 6-8 h. Rotary evaporate to obtain antibacterial modified polyester.

2. The method for preparing the antibacterial modified polyester fiber blended woven fabric according to claim 1, characterized in that, The length of the fine cotton fiber is 35-40 mm, and the fineness is 1.5-1.7 dtex.

3. The method for preparing the antibacterial modified polyester fiber blended woven fabric according to claim 1, characterized in that, The blending ratio of the antibacterial modified polyester fiber and the fine cotton fiber is 20-35:65-80.

4. The method for preparing the antibacterial modified polyester fiber blended woven fabric according to claim 1, characterized in that, The weight ratio of itaconic acid, 1,2-propanediol, hydroquinone and p-toluenesulfonic acid in step S1 is 120-140:80-90:1-1.1:1-1.

1.

5. The method for preparing the antibacterial modified polyester fiber blended woven fabric according to claim 1, characterized in that, The weight ratio of the unsaturated polyester, N,N-dimethylacetamide, azobisisobutyronitrile and 4-vinylchlorobenzyl chloride in step S2 is 3-4:560:0.1-0.3:5-10.

6. The method for preparing the antibacterial modified polyester fiber blended woven fabric according to claim 1, characterized in that, In step S3, the weight ratio of benzyl chloride-grafted polyester, N-methylpyrrolidone, pentamethyldivinyltriamine and iodooctadecane is 1-5:30-40:0.3-0.8:0.5-1.

7. The method for preparing the antibacterial modified polyester fiber blended woven fabric according to claim 1, characterized in that, The polyester chips are PET polyester chips.

8. The method for preparing the antibacterial modified polyester fiber blended woven fabric according to claim 1, characterized in that, The specific preparation method of the antibacterial modified polyester fiber is as follows: antibacterial modified polyester and polyester chips are blended, and then the mixture is spun at 260-270℃ at a spinning speed of 3000m / min, and then stretched at a ratio of 1.5-2 times to obtain antibacterial modified polyester fiber.

9. The method for preparing the antibacterial modified polyester fiber blended woven fabric according to claim 1, characterized in that, The weight ratio of the antibacterial modified polyester to polyester chips is 1-3:

10.

10. The method for preparing the antibacterial modified polyester fiber blended woven fabric according to claim 1, characterized in that, The density of the woven antibacterial modified polyester fiber blend fabric is 140-150 g / m³. 2 .

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