A polyester blended fabric with anti-pilling performance and preparation method thereof

Abstract

The invention discloses a polyester blended fabric with anti-pilling performance and a preparation method thereof, and belongs to the technical field of polyester blended fabric finishing. The invention solves the problem of poor anti-pilling performance of polyester blended fabrics. The invention immerses the polyester blended fabric in a polydopamine solution to increase the charge distribution, roughness and surface area of ​​the polyester fiber surface, and then performs fiber surface modification treatment in a solution containing sodium bicarbonate, urea and sodium chloride, and uses urea and sodium chloride to swell the polyester fiber molecular chain, further increase the surface area of ​​the polyester fiber and reduce the orientation degree, so that bicarbonate ions fully penetrate into the polyester fiber, making it easier for bicarbonate ions to react with the polyester fiber, reducing the glass transition temperature of the polyester fiber, partially hydrolyzing it, and finally reducing the strength of the polyester fiber and making the surface rough, thereby improving the anti-pilling performance of the polyester blended fabric under the effect of reducing the fiber strength and increasing the friction coefficient.

Description

Technical Field

[0001] The invention belongs to the technical field of polyester blended fabric finishing, and in particular relates to a polyester blended fabric with anti-pilling performance and a preparation method thereof. Background Art

[0002] Polyester fiber has the advantages of high strength, wear resistance, and wrinkle resistance. Cellulose fibers such as cotton, viscose, and modal have the advantages of good hygroscopicity, low static electricity, and good biodegradability. Polyester blended fabrics made by blending polyester fibers and cellulose fibers are widely used in the field of textiles and clothing because of their comfort, wear resistance, moisture absorption and perspiration, and high cost performance. However, polyester blended fabrics are prone to pilling during wearing or washing, which affects their appearance and wearing performance. At present, the resin finishing method is mainly used to improve the pilling phenomenon of polyester blended fabrics, but this method affects the feel of the fabric and wearing performance such as breathability, and after several washes, the pilling phenomenon of the fabric is further deteriorated. Summary of the invention

[0003] In order to solve the technical problem that polyester blended fabric has poor anti-pilling performance, the present invention provides a polyester blended fabric with anti-pilling performance and a preparation method thereof.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] One of the purposes of the present invention is to provide a method for preparing a polyester blended fabric with anti-pilling performance, the method comprising:

[0006] S1. Polydopamine treatment: the pre-cleaned polyester blended fabric is immersed in a polydopamine solution and then dried;

[0007] S2. Fabric fiber surface modification treatment: The dried polyester blended fabric is immersed in a mixed solution containing sodium bicarbonate, urea and sodium chloride to perform fabric fiber surface modification treatment, and then dried to obtain a polyester blended fabric with anti-pilling performance.

[0008] It is further defined that the polyester blended fabric in S1 is a fabric blended from polyester fibers and cellulose fibers.

[0009] It is further defined that the pre-cleaning method in S1 is: washing the polyester blended fabric alternately with ethanol and water for a total of 2 to 3 times.

[0010] It is further defined that the concentration of the polydopamine solution in S1 is 2-6 g / L.

[0011] It is further defined that the immersion temperature in S1 is 20-30°C and the immersion time is 30min-2h.

[0012] It is further defined that the concentrations of sodium bicarbonate, urea and sodium chloride in the mixed solution in S2 are 0.1~2 mol / L, 5~30 wt% and 0.1~1 mol / L, respectively.

[0013] It is further defined that the immersion temperature in S2 is 80-100°C and the immersion time is 30 min-1 h.

[0014] It is further defined that the drying temperature in S2 is 80-120°C and the drying time is 10 min-1 h.

[0015] It is further defined that the bath ratio in both S1 and S2 is 1:(10~30).

[0016] The second object of the present invention is to provide a polyester blended fabric with anti-pilling performance prepared by the above method.

[0017] It is further defined that the pilling level of polyester blended fabrics is 4~5.

[0018] The beneficial effects achieved by the present invention are as follows:

[0019] The polyester blended fabric provided by the present invention has excellent anti-pilling performance, with a pilling level of 4 to 5, and will not reduce the original wearing performance of the fabric. In addition, the method provided by the present invention is simple to operate, has a short process flow, and has a large-scale application prospect. Compared with the prior art, the present invention has the following advantages:

[0020] (1) In the present invention, the hydroxyl and amino groups on the polydopamine molecular chain act as hydrogen bond donors, and the carbonyl groups in the polyester fiber act as hydrogen bond acceptors. Under the action of hydrogen bonds, polydopamine and polyester fiber are combined, which increases the charge distribution and roughness on the surface of the polyester fiber, thereby increasing the surface area of ​​the polyester fiber. In addition, the benzene ring structure between polydopamine and the polyester fiber macromolecule undergoes a π-π stacking effect, which further strengthens the combination of polydopamine and polyester fiber, and is conducive to further increasing the charge distribution, roughness and surface area of ​​the polyester fiber surface.

[0021] (2) In the present invention, urea causes the polyester fiber molecular chain to swell, increases the surface area of ​​the polyester fiber and reduces its orientation degree. In addition, the polydopamine treatment has also increased the surface charge distribution, roughness and surface area of ​​the polyester fiber. Therefore, the bicarbonate ions can fully penetrate into the interior of the polyester fiber, making it easier for the bicarbonate ions to react with the oxygen-containing polar groups on the polyester fiber treated with polydopamine, reducing the acidic functional groups in the polyester molecules and lowering the glass transition temperature of the polyester fiber, thereby partially hydrolyzing the polyester fiber, reducing the strength of the polyester fiber and increasing the roughness of the polyester fiber surface. Sodium chloride can increase the penetration of urea, open the microchannels inside the polyester fiber, make it easier for urea to penetrate into the polyester fiber, and make it easier for urea molecules to penetrate into the fiber, partially destroying the crystal structure inside the polyester fiber, making the polyester fiber more likely to swell.

[0022] (3) Under the synergistic effect of polydopamine, urea, sodium chloride and bicarbonate ions, the strength of polyester fibers is reduced and the fiber surface becomes rough, and the friction coefficient is increased. As a result, during the friction process of polyester blended fabrics, the fibers migrate to the surface of the fabric and are not easy to form or entangle. Even if hairiness and pilling are formed, they are easily worn off and are not easy to entangle into pilling, thereby improving the anti-pilling performance of polyester blended fabrics.

[0023] (4) The polydopamine concentration of the present invention is 2-6 g / L and the immersion time is 30 min-2 h. This is because when the polydopamine concentration is too low or the immersion time is too short, it is insufficient to form a film on the surface of the polyester fiber. When the polydopamine concentration is too high or the immersion time is too long, the polydopamine on the surface of the polyester blended fabric will agglomerate, thereby affecting the subsequent urea, sodium bicarbonate and sodium chloride to further interact and react with the polyester fiber. The sodium bicarbonate concentration of the present invention is 0.1-2 mol / L. When the sodium bicarbonate concentration is too low, it cannot effectively react with the polar groups formed on the surface of the polyester fiber after the polydopamine treatment. When the sodium bicarbonate concentration is too high, the alkaline environment it provides will cause excessive damage to the polyester fiber, thereby affecting the mechanical properties of the polyester blended fabric. The urea concentration of the invention is 5-30wt%, and the sodium chloride concentration is 0.1-1mol / L. Within this concentration range, the swelling effect of the polyester fiber can be ensured to be good. When the concentrations of urea and sodium chloride are too high, the polyester fiber will be excessively expanded and deformed, affecting the mechanical properties, hygroscopicity and air permeability of the polyester blended fabric, and affecting the wearing performance of the fabric. When the concentrations of urea and sodium chloride are too low, the swelling effect of the polyester fiber is poor, which is not conducive to improving the anti-pilling performance of the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a photo of the polyester blended fabric obtained in Example 1 after testing;

[0025] Figure 2 This is a photo of the polyester blended fabric obtained in Example 2 after testing;

[0026] Figure 3 This is a photo of the polyester blended fabric obtained in Example 3 after testing;

[0027] Figure 4 This is a photo of the polyester blended fabric obtained in Example 4 after testing;

[0028] Figure 5 This is a photo of the polyester blended fabric obtained in Example 5 after testing;

[0029] Figure 6 This is a photo of the polyester blended fabric obtained in Example 6 after testing;

[0030] Figure 7 This is a photo of the polyester blended fabric obtained in Example 7 after testing;

[0031] Figure 8 This is a photo of the polyester blended fabric obtained in Example 8 after testing;

[0032] Fig. 9 This is a photo of the polyester blended fabric obtained in Example 9 after testing;

[0033] Fig.10 This is a photo of the polyester blended fabric obtained in Example 10 after testing;

[0034] Fig.11 This is a photo of the polyester blended fabric obtained in Example 11 after testing;

[0035] Fig.12 This is a photo of the polyester blended fabric obtained in Example 12 after testing;

[0036] Fig.13 This is a photo of the polyester blended fabric obtained in Example 13 after testing;

[0037] Fig.14 This is a photo of the polyester blended fabric obtained in Example 14 after testing;

[0038] Fig.15 This is a photo of the polyester blended fabric obtained in Comparative Example 1 after testing;

[0039] Fig.16 This is a photo of the polyester blended fabric obtained in Comparative Example 2 after testing;

[0040] Fig.17 This is a photo of the polyester blended fabric obtained in Comparative Example 3 after testing;

[0041] Fig.18 This is a photo of the polyester blended fabric obtained in Comparative Example 4 after testing. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in combination with the embodiments of the specification. In the following description, many specific details are elaborated to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0043] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0044] The experimental methods used in the following examples are conventional methods unless otherwise specified. The materials, reagents, methods and instruments used are conventional materials, reagents, methods and instruments in the art unless otherwise specified, and can be obtained through commercial channels by those skilled in the art.

[0045] Example 1

[0046] S1. Polydopamine treatment: The polyester blended fabric was rinsed with 75% ethanol and water alternately for 3 times, dried after rinsing, and then immersed in a 2g / L polydopamine solution at 30℃ for 1h, with a bath ratio of 1:20, and then dried at 100℃ for 30min;

[0047] S2. Fabric fiber surface modification: The dried polyester blended fabric is immersed in a mixed solution containing sodium bicarbonate, urea and sodium chloride with a bath ratio of 1:20, and the fabric fiber surface modification is carried out at 90°C for 40 minutes. The concentrations of sodium bicarbonate, urea and sodium chloride in the mixed solution are 1 mol / L, 15wt% and 0.5 mol / L, respectively. The polyester blended fabric is then dried at 100°C for 30 minutes.

[0048] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was 4.5.

[0049] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Figure 1 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is basically no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (4.5) and good anti-pilling performance.

[0050] The concentration of polydopamine used in this embodiment is 2 g / L, and the immersion time is 1 h, which can make polydopamine form a film on the surface of the polyester fiber, will not cause the polydopamine on the surface of the fabric to agglomerate, and will not affect the subsequent interaction and reaction between urea, sodium bicarbonate and sodium chloride and the polyester fiber, so it can improve the anti-pilling performance of the polyester blended fabric; in addition, the concentration of sodium bicarbonate in this embodiment is 1 mol / L, which can effectively react with the polar groups formed on the surface of the polyester fiber; in this embodiment, the concentration of urea is 15wt% and the concentration of sodium chloride is 0.5 mol / L, so that the swelling degree of the polyester fiber is appropriate, the polyester fiber will not be over-expanded and deformed, which is beneficial to improving the anti-pilling performance of the polyester blended fabric.

[0051] Example 2

[0052] The difference between this embodiment and embodiment 1 is that the concentration of the polydopamine solution in S1 is 6 g / L, and the bath ratios in S1 and S2 are both 1:30.

[0053] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was grade 5.

[0054] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Figure 2 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (level 5) and good anti-pilling performance.

[0055] Example 3

[0056] S1. Polydopamine treatment: The polyester blended fabric was rinsed with 75% ethanol and water alternately for 3 times, dried after rinsing, and then immersed in a polydopamine solution with a concentration of 4g / L at 25℃ for 30min, with a bath ratio of 1:20, and then dried at 120℃ for 10min;

[0057] S2. Fabric fiber surface modification: The dried polyester blended fabric was immersed in a mixed solution of sodium bicarbonate, urea and sodium chloride with a bath ratio of 1:20, and the fabric fiber surface modification was carried out at 90°C for 40 minutes. The concentrations of sodium bicarbonate, urea and sodium chloride in the mixed solution were 1 mol / L, 15wt% and 0.5 mol / L, respectively. The polyester blended fabric was then dried at 120°C for 10 minutes.

[0058] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was 4.5.

[0059] The actual picture of the polyester blended fabric obtained in this example after testing is as follows Figure 3 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is basically no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (4.5) and good anti-pilling performance.

[0060] Example 4

[0061] The difference between this embodiment and embodiment 3 is that the immersion time in S1 is 2 hours.

[0062] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was grade 5.

[0063] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Figure 4 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (level 5) and good anti-pilling performance.

[0064] Example 5

[0065] S1. Polydopamine treatment: The polyester blended fabric was rinsed with 75% ethanol and water alternately for 3 times, dried after rinsing, and then immersed in a polydopamine solution with a concentration of 4 g / L at 20°C for 1 h, with a bath ratio of 1:10, and then dried at 80°C for 1 h;

[0066] S2. Fabric fiber surface modification: The dried polyester blended fabric was immersed in a mixed solution of sodium bicarbonate, urea and sodium chloride with a bath ratio of 1:10 at 90°C for 40 minutes. The concentrations of sodium bicarbonate, urea and sodium chloride in the mixed solution were 0.1 mol / L, 15 wt% and 0.5 mol / L, respectively. The polyester blended fabric was then dried at 80°C for 1 hour.

[0067] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was 4.5.

[0068] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Figure 5 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is basically no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (4.5) and good anti-pilling performance.

[0069] Example 6

[0070] The difference between this embodiment and embodiment 5 is that the concentration of sodium bicarbonate in S2 is 2 mol / L.

[0071] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was 4.5.

[0072] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Figure 6 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is basically no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (4.5) and good anti-pilling performance.

[0073] Example 7

[0074] S1. Polydopamine treatment: The polyester blended fabric was rinsed with 75% ethanol and water alternately for 3 times, dried after rinsing, and then immersed in a polydopamine solution with a concentration of 4 g / L at 25°C for 1 h, with a bath ratio of 1:20, and then dried at 100°C for 30 min;

[0075] S2. Fabric fiber surface modification: The dried polyester blended fabric is immersed in a mixed solution containing sodium bicarbonate, urea and sodium chloride with a bath ratio of 1:20, and the fabric fiber surface modification is carried out at 90°C for 40 minutes. The concentrations of sodium bicarbonate, urea and sodium chloride in the mixed solution are 1 mol / L, 5 wt% and 0.5 mol / L, respectively. The polyester blended fabric is then dried at 100°C for 30 minutes.

[0076] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was 4.5.

[0077] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Figure 7 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is basically no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (4.5) and good anti-pilling performance.

[0078] Example 8

[0079] The difference between this embodiment and embodiment 7 is that the concentration of urea in S2 is 30 wt %.

[0080] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was 4.5.

[0081] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Figure 8 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is basically no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (4.5) and good anti-pilling performance.

[0082] Example 9

[0083] S1. Polydopamine treatment: The polyester blended fabric was rinsed with 75% ethanol and water alternately for 3 times, dried after rinsing, and then immersed in a polydopamine solution with a concentration of 4 g / L at 25°C for 1 h, with a bath ratio of 1:30, and then dried at 100°C for 30 min;

[0084] S2. Fabric fiber surface modification: The dried polyester blended fabric is immersed in a mixed solution containing sodium bicarbonate, urea and sodium chloride with a bath ratio of 1:30, and the fabric fiber surface modification is carried out at 90°C for 40 minutes. The concentrations of sodium bicarbonate, urea and sodium chloride in the mixed solution are 1 mol / L, 15wt% and 0.1 mol / L, respectively. The polyester blended fabric is then dried at 100°C for 30 minutes.

[0085] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was 4.5.

[0086] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Fig. 9 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is basically no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (4.5) and good anti-pilling performance.

[0087] Example 10

[0088] The difference between this embodiment and embodiment 9 is that the concentration of sodium chloride in S2 is 1 mol / L.

[0089] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was grade 5.

[0090] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Fig.10 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (level 5) and good anti-pilling performance.

[0091] Embodiment 11

[0092] S1. Polydopamine treatment: The polyester blended fabric was rinsed with 75% ethanol and water alternately for 3 times, dried after rinsing, and then immersed in a polydopamine solution with a concentration of 4 g / L at 30°C for 1 h, with a bath ratio of 1:20, and then dried at 100°C for 30 min;

[0093] S2. Fabric fiber surface modification: The dried polyester blended fabric is immersed in a mixed solution containing sodium bicarbonate, urea and sodium chloride with a bath ratio of 1:20, and the fabric fiber surface modification is carried out at 80°C for 40 minutes. The concentrations of sodium bicarbonate, urea and sodium chloride in the mixed solution are 1 mol / L, 15wt% and 0.5 mol / L, respectively. The polyester blended fabric is then dried at 100°C for 30 minutes.

[0094] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was 4.5.

[0095] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Fig.11 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is basically no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (4.5) and good anti-pilling performance.

[0096] Example 12

[0097] The difference between this embodiment and embodiment 11 is that the surface modification treatment temperature of the fabric fiber in S2 is 100°C.

[0098] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was grade 5.

[0099] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Fig.12 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (level 5) and good anti-pilling performance.

[0100] Embodiment 13

[0101] S1. Polydopamine treatment: The polyester blended fabric was rinsed with 75% ethanol and water alternately for 3 times, dried after rinsing, and then immersed in a polydopamine solution with a concentration of 4 g / L at 25°C for 1 h, with a bath ratio of 1:30, and then dried at 80°C for 1 h;

[0102] S2. Fabric fiber surface modification: The dried polyester blended fabric was immersed in a mixed solution of sodium bicarbonate, urea and sodium chloride with a bath ratio of 1:30, and the fabric fiber surface modification was carried out at 90°C for 30 minutes. The concentrations of sodium bicarbonate, urea and sodium chloride in the mixed solution were 1 mol / L, 15wt% and 0.5 mol / L, respectively. The polyester blended fabric was then dried at 80°C for 1 hour.

[0103] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was 4.5.

[0104] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Fig.13 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (4.5) and good anti-pilling performance.

[0105] Embodiment 14

[0106] The difference between this embodiment and embodiment 13 is that the surface modification treatment time of the fabric fiber in S2 is 1 hour.

[0107] The polyester blended fabric obtained in this example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this example was 4.5.

[0108] The actual photos of the polyester blended fabric obtained in this example after testing are as follows Fig.14 As shown in the figure, it can be seen that the surface of the fabric is smooth and flat, and there is basically no pilling phenomenon, which means that the polyester blended fabric prepared in this embodiment has a high pilling level (4.5) and good anti-pilling performance.

[0109] Comparative Example 1

[0110] The difference between this comparative example and Example 1 is that: the polyester blended fabric is not subjected to any treatment, and the pilling performance test is carried out. The test standard refers to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results show that the pilling grade of the polyester blended fabric in this comparative example is grade 1.5.

[0111] The actual photos of the polyester blended fabric in this comparative example after testing are as follows: Fig.15As shown in the figure, it can be seen that after testing without any treatment, the pilling phenomenon on the fabric surface is serious, indicating that the pilling level of the untreated polyester blended fabric is very low (level 1.5) and the anti-pilling performance is very poor.

[0112] Comparative Example 2

[0113] S1. Fabric fiber surface modification: The polyester blended fabric was rinsed with 75% ethanol and water alternately for 3 times, and then dried. The dried polyester blended fabric was immersed in a mixed solution containing sodium bicarbonate, urea and sodium chloride with a bath ratio of 1:20. The fabric fiber surface modification was carried out at 100°C for 40 minutes. The concentrations of sodium bicarbonate, urea and sodium chloride in the mixed solution were 1 mol / L, 15wt% and 0.5 mol / L, respectively. The polyester blended fabric was then dried at 100°C for 30 minutes.

[0114] The polyester blended fabric obtained in this comparative example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this comparative example was 2.5.

[0115] The actual photos of the polyester blended fabric obtained in this comparative example after testing are as follows Fig.16 As shown in the figure, it can be seen that pilling occurs on the surface of the fabric. This is because the polyester blended fabric is not treated with polydopamine in this comparative example, resulting in a relatively smooth surface of the polyester fiber, no polar groups on the fiber surface, and reduced surface charge distribution, which affects the wettability, surface area and roughness of the polyester fiber, thereby causing sodium bicarbonate, urea, etc. to be unable to fully react with the polyester fiber, and unable to effectively reduce the strength of the polyester fiber and increase its friction coefficient, resulting in a lower pilling grade (grade 2.5) of the polyester blended fabric, and poor anti-pilling performance.

[0116] Comparative Example 3

[0117] S1. Polydopamine treatment: The polyester blended fabric was rinsed with 75% ethanol and water alternately for 3 times, dried after rinsing, and then immersed in a polydopamine solution with a concentration of 4 g / L at 30°C for 1 h, with a bath ratio of 1:20, and then dried at 100°C for 30 min;

[0118] S2. Fabric fiber surface modification: The dried polyester blended fabric was immersed in a mixed solution of urea and sodium chloride with a bath ratio of 1:20, and the fabric fiber surface modification was carried out at 100°C for 40 minutes. The concentrations of urea and sodium chloride in the mixed solution were 15wt% and 0.5mol / L, respectively. The polyester blended fabric was then dried at 100°C for 30 minutes.

[0119] The polyester blended fabric obtained in this comparative example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this comparative example was grade 2.

[0120] The actual picture of the polyester blended fabric obtained in this comparative example after testing is as follows Fig.17 As shown in the figure, it can be seen that the fabric surface has pilling phenomenon. This is because sodium bicarbonate is not used in the surface modification treatment of the fabric fiber in this comparative example, which cannot reduce the glass transition temperature of the polyester fiber, cannot partially hydrolyze the polyester fiber, and thus cannot further increase the surface roughness of the polyester fiber. Although urea and sodium chloride synergistically swell the polyester fiber and affect the orientation of the polyester fiber, this effect is limited, and the improvement of the anti-pilling performance of the polyester blended fabric is also limited. Therefore, the pilling grade of the polyester blended fabric prepared in this comparative example is low (grade 2), and the anti-pilling performance is poor.

[0121] Comparative Example 4

[0122] S1. Polydopamine treatment: The polyester blended fabric was rinsed with 75% ethanol and water alternately for 3 times, dried after rinsing, and then immersed in a polydopamine solution with a concentration of 4 g / L at 30°C for 1 h, with a bath ratio of 1:20, and then dried at 100°C for 30 min;

[0123] S2. Fabric fiber surface modification: The dried polyester blended fabric is immersed in a mixed solution containing sodium bicarbonate and sodium chloride with a bath ratio of 1:20, and the fabric fiber surface modification treatment is carried out at 100°C for 40 minutes. The concentrations of sodium bicarbonate and sodium chloride in the mixed solution are 1 mol / L and 0.5 mol / L, respectively. The polyester blended fabric is then dried at 100°C for 30 minutes.

[0124] The polyester blended fabric obtained in this comparative example was subjected to a pilling test, and the test standard referred to GB / T 4802.3-2008 "Determination of pilling properties of textile fabrics Part 3: Pilling box method". The test results showed that the pilling grade of the polyester blended fabric obtained in this comparative example was grade 2.

[0125] The actual picture of the polyester blended fabric obtained in this comparative example after testing is as follows Fig.18As shown in the figure, it can be seen that the fabric surface has pilling phenomenon, which is because urea is not used in the surface modification of the fabric fiber in this comparative example, which affects the swelling of the polyester fiber, thereby preventing the sodium bicarbonate from entering the polyester fiber to react, and cannot effectively reduce the glass transition temperature of the polyester fiber, and cannot further increase the roughness of the polyester fiber surface, so the improvement of the anti-pilling performance of the polyester blended fabric is also limited. Therefore, the pilling grade of the polyester blended fabric prepared in this comparative example is low (grade 2), and the anti-pilling performance is poor.

[0126] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for preparing a polyester blended fabric with anti-pilling performance, characterized in that: The method includes: S1. Polydopamine treatment: the pre-cleaned polyester blended fabric is immersed in a polydopamine solution and then dried; S2, fabric fiber surface modification treatment: the dried polyester blended fabric is immersed in a mixed solution containing sodium bicarbonate, urea and sodium chloride to perform fabric fiber surface modification treatment, and then dried to obtain a polyester blended fabric with anti-pilling performance; The concentration of the polydopamine solution in S1 is 2-6 g / L; the concentrations of sodium bicarbonate, urea and sodium chloride in the mixed solution in S2 are 0.1-2 mol / L, 5-30 wt% and 0.1-1 mol / L respectively.

2. The preparation method according to claim 1, characterized in that: The polyester blended fabric in S1 is a fabric blended from polyester fibers and cellulose fibers.

3. The preparation method according to claim 1, characterized in that: The immersion temperature in S1 is 20~30℃ and the time is 30min~2h.

4. The preparation method according to claim 1, characterized in that: The immersion temperature in S2 is 80~100℃ and the time is 30min~1h.

5. The preparation method according to claim 1, characterized in that: The drying temperature in S2 is 80~120℃ and the time is 10min~1h.

6. The preparation method according to claim 1, characterized in that: The bath ratio in S1 and S2 is 1:(10~30).

7. A polyester blended fabric with anti-pilling performance, characterized in that: Prepared by the method according to any one of claims 1 to 6.

8. The polyester blended fabric according to claim 7, characterized in that: The pilling grade of the polyester blended fabric is 4~5.

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