Antistatic dust-free cloth and preparation method thereof

Abstract

The invention relates to antistatic dust-free cloth and a preparation method thereof, and belongs to the technical field of dust-free cloth. A plasma treatment technology is adopted to remove impurities on the surface of polyester fibers and increase the contact area of the polyester fibers, and sericin is added for modification, so that the compatibility and binding force of the polyester fibers and conductive fibers are effectively improved, and meanwhile, the finished cloth is endowed with softer touch feeling; polyethylene glycol glycidyl ether is introduced and can be combined with sericin to form a cross-linked structure, so that the antistatic performance is further improved, and the softness and wear resistance are optimized. Active groups can be introduced to the surfaces of the carbon fibers through mixed acid treatment, and the compatibility of the carbon fibers and the modified polyester fibers is enhanced. Polyoxyethylene alkylamine permeates into the fibers by using a decompression infiltration technology, and the dust-free cloth has a long-acting antistatic effect by combining the antistatic property of the conductive fibers. The comprehensive performance of the cloth is effectively improved, the requirement of the electronic industry for the high anti-static performance of the dust-free cloth is met, and wide application prospects are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of dust-free cloths and relates to an antistatic dust-free cloth and a preparation method thereof. Background Art

[0002] In the field of high-tech manufacturing, especially in the fields of semiconductor production line chips, microprocessors, semiconductor assembly lines, circuit board production lines, optical products, laboratories and LED display product technology, the cleanliness and electrostatic protection of the production environment are extremely high. Static electricity may not only cause damage to electronic components, but also affect the performance and reliability of the product. Therefore, the dust-free cloth materials used in these production environments must have excellent anti-static properties to ensure the smooth progress of the production process and the stability of product quality.

[0003] Although traditional dust-free cloths can meet basic cleaning needs to a certain extent, they are not good at anti-static performance. Static electricity is often generated by friction between materials, and traditional dust-free cloth materials are prone to static electricity accumulation during the wiping process, which not only absorbs dust particles in the air, but may also cause damage to sensitive electronic components. In addition, after repeated use, the anti-static performance of traditional dust-free cloths tends to gradually decrease, thus affecting the cleaning effect and product quality. Summary of the invention

[0004] The object of the present invention is to provide an antistatic dust-free cloth and a preparation method thereof, which has the characteristics of long-lasting antistatic performance, wear resistance and good cleaning efficiency.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An antistatic dust-free cloth, the formula of the antistatic dust-free cloth is as follows: by weight, 70-80 parts of modified polyester fiber, 20-30 parts of conductive fiber, and 170-200 parts of antistatic impregnation liquid.

[0007] Wherein, the preparation method of modified polyester fiber is as follows:

[0008] S1-1: washing 95 to 105 parts by weight of polyester fibers with deionized water and drying them in a vacuum oven at 60° C. for 6 hours, treating the polyester fibers with plasma, evacuating to absolute vacuum, and introducing nitrogen to keep the pressure constant at 30 Pa, thereby obtaining pretreated polyester fibers;

[0009] S1-2: adding 10 to 18 parts by weight of sericin to 70 to 100 parts by weight of deionized water at 40 to 50° C., and stirring with ultrasonic waves for 30 minutes to obtain a solution B;

[0010] S1-3: The pretreated polyester fiber and solution B are mixed, ultrasonically stirred at 60°C for 40 to 50 minutes, sodium hydroxide solution is added dropwise until the pH is 9 to 10, 1.5 to 3 parts by weight of polyethylene glycol glycidyl ether is added, ultrasonically stirred at 70°C for 2 hours, washed with deionized water, and dried in a vacuum drying oven at 60°C to obtain the modified polyester fiber.

[0011] Furthermore, in the S1-1, the plasma power is 150-180 W, and the plasma treatment time is 5-10 min.

[0012] Furthermore, the stirring speed in S1-2 is 550-650 r / min.

[0013] Furthermore, the concentration of the sodium hydroxide solution in S1-3 is 2M.

[0014] Furthermore, the preparation method of the conductive fiber is as follows: 30 to 50 parts by weight of carbon fiber is mixed with 90 to 100 parts by weight of a mixed acid solution, wherein the mixed acid solution is a mixture of 2M hydrochloric acid and 3M citric acid in a mass ratio of 1:3, condensed and refluxed for 3 hours, washed with deionized water until the pH of the eluent is about 7, and placed in a vacuum drying oven at 60°C for drying to obtain the conductive fiber.

[0015] A method for preparing an antistatic dust-free cloth, the specific steps of the preparation method are as follows:

[0016] S6-1: blending and weaving the modified polyester fiber and the conductive fiber according to a formula to obtain a grey cloth;

[0017] S6-2: Infiltrating the embryo in an antistatic impregnation liquid under reduced pressure at a temperature of 60 to 70° C. for 30 to 60 minutes, and then washing with ultrapure water and shaping to obtain a finished fabric;

[0018] S6-3: Cut and seal the finished cloth using a laser, and finally clean the dust-free cloth using ultrapure water and perform vacuum packaging to obtain the antistatic dust-free cloth.

[0019] Furthermore, the grey cloth with a thickness of 0.5 mm is woven in the S6-1.

[0020] Furthermore, the antistatic impregnation liquid in S6-2 is a mixture of polyoxyethylene alkylamine and ultrapure water in a mass ratio of (1:2):10.

[0021] Furthermore, the reduced pressure infiltration pressure in S6-2 is set to 0.3-0.5 MPa.

[0022] Furthermore, the resistivity of the ultrapure water is greater than 18 MΩ.

[0023] At present, conventional fiber materials and conductive fibers are usually mixed to improve the antistatic performance of the fabric. However, the compatibility between conventional fiber materials and conductive fibers is poor, and the dispersion of conductive fibers is not good, resulting in an unbalanced antistatic performance of the overall fabric, making it difficult to meet the electronics industry's demand for high antistatic performance of dust-free cloths.

[0024] In the field of silk processing, sericin, a natural polymer rich in amino acids such as serine and aspartic acid, is often regarded as waste discharge. However, given its excellent biocompatibility and potential waste resource value, the reuse of sericin is particularly important. The addition of sericin can significantly improve the wettability and adhesion of polyester fibers, thereby enhancing the bonding strength and compatibility between polyester fibers and conductive fibers; in addition, the addition of sericin also gives the finished fabric a softer touch, effectively avoiding the scratching phenomenon that may occur during the processing of precision materials.

[0025] Plasma treatment is to generate high-energy particle gas substances through discharge. During the collision process, high-energy particles generate energetic rays that act on the fiber surface, which can remove impurities on the fiber surface and roughen the fiber surface, increasing the contact area between the fiber and different substances; during the action of high-energy rays, high-energy bonds on the fiber surface will be broken, surface free radicals will be generated, the activation performance of the fiber surface will be improved, and the interface bonding strength with other components will be improved. While improving the performance of polyester fibers, plasma treatment does not affect its thermal stability or damage the fiber matrix, ensuring the maintenance of the fiber tensile strength.

[0026] Polyethylene glycol glycidyl ether is a polymer containing epoxy groups, which exhibits good cross-linking and antistatic properties. The epoxy groups of polyethylene glycol glycidyl ether can react with the amino or hydroxyl groups of sericin to form a cross-linked structure, thereby improving the antistatic properties of polyester fibers. In addition, the addition of polyethylene glycol glycidyl ether further optimizes the softness and wear resistance of the fiber, making it exhibit better comprehensive performance in practical applications.

[0027] In terms of carbon fiber treatment, mixed acid treatment can introduce hydrophilic groups such as hydroxyl and carboxyl groups on the surface of carbon fiber. The introduction of these groups significantly enhances the compatibility of carbon fiber and modified polyester fiber surface, providing an effective guarantee for the efficient combination of the two.

[0028] As a non-ionic antistatic agent, polyoxyethylene alkylamine has low toxicity and irritation. It can fully penetrate into the fiber under reduced pressure distillation conditions to form a lasting antistatic effect. At the same time, polyoxyethylene alkylamine is resistant to washing after being fixed inside the fiber, and still maintains good antistatic properties after multiple washings.

[0029] Beneficial effects of the present invention:

[0030] The addition of sericin not only improves the wettability and adhesion of polyester fibers, enhances the binding force and compatibility with conductive fibers, but also gives the finished cloth a softer touch. Plasma treatment can remove impurities on the fiber surface and roughen the surface, increase the contact area, and generate surface free radicals, improve activation performance, and enhance the binding force with other components without affecting the thermal stability and tensile strength of the fiber. Polyethylene glycol glycidyl ether improves the antistatic properties of polyester fibers and optimizes softness and wear resistance by combining with sericin to form a cross-linked structure. Mixed acid treatment enhances the compatibility of carbon fibers and modified polyester fibers. In the production process of dust-free cloth, reduced pressure infiltration is used to permanently penetrate the fiber interior with polyoxyethylene alkylamine, further enhancing the antistatic effect. DETAILED DESCRIPTION

[0031] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0032] In the following examples and comparative examples:

[0033] Polyester fiber, purchased from Hubei Longxin Chemical Industry Co., Ltd., with a purity of 98%;

[0034] Sericin was purchased from Hubei Jianchu Biopharmaceutical Co., Ltd.;

[0035] Polyethylene glycol glycidyl ether was purchased from Xiamen Sinobond Biotechnology Co., Ltd.;

[0036] Carbon fiber was purchased from Haiyan New Century Petrochemical Equipment Co., Ltd.;

[0037] Sodium hydroxide, purchased from Shandong Zhongyuan Chemical Co., Ltd., purity 99%;

[0038] Polyoxyethylene alkylamine was purchased from Shanghai MacLean Biochemical Technology Co., Ltd.;

[0039] Citric acid was purchased from Shanghai MacLean Biochemical Technology Co., Ltd.

[0040] Example 1

[0041] An antistatic dust-free cloth, the antistatic dust-free cloth formula 1 is as follows, in parts by weight, 75 parts of modified polyester fiber, 25 parts of conductive fiber, 180 parts of antistatic impregnation liquid,

[0042] Wherein, the preparation method of modified polyester fiber is as follows:

[0043] S1-1: washing 95 parts by weight of polyester fiber with deionized water and drying it in a vacuum oven at 60° C. for 6 h, treating the polyester fiber with plasma at a plasma power of 150 W for 5 min, and introducing nitrogen gas to keep the pressure constant at 30 Pa after evacuating to absolute vacuum to obtain pretreated polyester fiber;

[0044] S1-2: 15 parts by weight of sericin was added to 90 parts by weight of deionized water at 45° C., and ultrasonically stirred for 30 minutes at a stirring speed of 550 r / min to obtain solution A;

[0045] S1-3: The pretreated polyester fiber and solution A are mixed, ultrasonically stirred at 60°C for 45 minutes, 2M sodium hydroxide solution is added dropwise until the pH is 9, 2 parts by weight of polyethylene glycol glycidyl ether is added, ultrasonically stirred at 70°C for 2 hours, washed with deionized water, and dried in a vacuum drying oven at 60°C to obtain the modified polyester fiber.

[0046] The preparation method of the conductive fiber is as follows: 40 parts by weight of carbon fiber is mixed with 95 parts by weight of a mixed acid solution, wherein the mixed acid solution is a mixture of 2M hydrochloric acid and 3M citric acid in a mass ratio of 1:3, condensed and refluxed for 3 hours, washed with deionized water until the pH of the eluent is about 7, and placed in a vacuum drying oven at 60°C for drying to obtain the conductive fiber.

[0047] A method for preparing an antistatic dust-free cloth, the specific steps of the preparation method are as follows:

[0048] S6-1: The modified polyester fiber and the conductive fiber are blended and woven according to formula 1 to obtain a grey cloth with a thickness of 0.5 mm;

[0049] S6-2: Infiltrating the embryo fabric in an antistatic impregnation liquid under reduced pressure, wherein the antistatic impregnation liquid is a mixture of polyoxyethylene alkylamine and ultrapure water in a mass ratio of 1.5:10, the pressure is 0.4 MPa, the temperature is 65°C, the impregnation time is 45 minutes, and then the finished fabric is subjected to an ultrapure water washing process and a shaping process;

[0050] S6-3: Cut and seal the finished cloth using a laser, and finally clean the dust-free cloth using ultrapure water and perform vacuum packaging to obtain the antistatic dust-free cloth.

[0051] Example 2

[0052] An antistatic dust-free cloth, the antistatic dust-free cloth formula 2 is as follows, in parts by weight, 70 parts of modified polyester fiber, 30 parts of conductive fiber, 170 parts of antistatic impregnation liquid,

[0053] Wherein, the preparation method of modified polyester fiber is as follows:

[0054] S1-1: washing 90 parts by weight of polyester fiber with deionized water and drying it in a vacuum oven at 60° C. for 6 h, treating the polyester fiber with plasma at a plasma power of 160 W for 7 min, and introducing nitrogen to make the pressure constant at 30 Pa after evacuating to absolute vacuum to obtain pretreated polyester fiber;

[0055] S1-2: 10 parts by weight of sericin was added to 70 parts by weight of deionized water at 40° C., and ultrasonically stirred for 30 minutes at a stirring speed of 600 r / min to obtain solution A;

[0056] S1-3: The pretreated polyester fiber and solution A are mixed, ultrasonically stirred at 60°C for 45 minutes, 2M sodium hydroxide solution is added dropwise until the pH is 9.5, 1.5 parts by weight of polyethylene glycol glycidyl ether is added, ultrasonically stirred at 70°C for 2 hours, washed with deionized water, and dried in a vacuum drying oven at 60°C to obtain the modified polyester fiber.

[0057] The preparation method of the conductive fiber is as follows: 30 parts by weight of carbon fiber is mixed with 90 parts by weight of a mixed acid solution, wherein the mixed acid solution is a mixture of 2M hydrochloric acid and 3M citric acid in a mass ratio of 1:3, condensed and refluxed for 3 hours, washed with deionized water until the pH of the eluent is about 7, and placed in a vacuum drying oven at 60°C for drying to obtain the conductive fiber.

[0058] A method for preparing an antistatic dust-free cloth, the specific steps of the preparation method are as follows:

[0059] S6-1: The modified polyester fiber and the conductive fiber are blended and woven according to formula 2 to obtain a grey cloth with a thickness of 0.5 mm;

[0060] S6-2: Infiltrating the embryo fabric in an antistatic impregnation liquid under reduced pressure, wherein the antistatic impregnation liquid is a mixture of polyoxyethylene alkylamine and ultrapure water in a mass ratio of 1:10, the pressure is 0.5 MPa, the temperature is 60°C, the impregnation time is 30 min, and then the finished fabric is subjected to an ultrapure water washing process and a shaping process to obtain the finished fabric;

[0061] S6-3: Cut and seal the finished cloth using a laser, and finally clean the dust-free cloth using ultrapure water and perform vacuum packaging to obtain the antistatic dust-free cloth.

[0062] Example 3

[0063] An antistatic dust-free cloth, the antistatic dust-free cloth formula 3 is as follows, in parts by weight, 80 parts of modified polyester fiber, 20 parts of conductive fiber, 200 parts of antistatic impregnation liquid,

[0064] Wherein, the preparation method of modified polyester fiber is as follows:

[0065] S1-1: washing 105 parts by weight of polyester fiber with deionized water and drying it in a vacuum oven at 60° C. for 6 h, treating the polyester fiber with plasma at a plasma power of 180 W for 10 min, and then introducing nitrogen to keep the pressure constant at 30 Pa to obtain pretreated polyester fiber;

[0066] S1-2: 18 parts by weight of sericin was added to 100 parts by weight of deionized water at 50° C., and ultrasonically stirred for 30 minutes at a stirring speed of 650 r / min to obtain solution A;

[0067] S1-3: The pretreated polyester fiber and solution A are mixed, ultrasonically stirred at 60°C for 50 minutes, 2M sodium hydroxide solution is added dropwise until the pH is 10, 3 parts by weight of polyethylene glycol glycidyl ether are added, ultrasonically stirred at 70°C for 2 hours, washed with deionized water, and dried in a vacuum drying oven at 60°C to obtain the modified polyester fiber.

[0068] The preparation method of the conductive fiber is as follows: 50 parts by weight of carbon fiber is mixed with 100 parts by weight of a mixed acid solution, wherein the mixed acid solution is a mixture of 2M hydrochloric acid and 3M citric acid in a mass ratio of 1:3, condensed and refluxed for 3 hours, washed with deionized water until the pH of the eluent is about 7, and dried in a vacuum drying oven at 60°C to obtain the conductive fiber.

[0069] A method for preparing an antistatic dust-free cloth, the specific steps of the preparation method are as follows:

[0070] S6-1: The modified polyester fiber and the conductive fiber are blended and woven according to formula 3 to obtain a grey cloth with a thickness of 0.5 mm;

[0071] S6-2: Infiltrating the embryo fabric in an antistatic impregnation liquid under reduced pressure, wherein the antistatic impregnation liquid is a mixture of polyoxyethylene alkylamine and ultrapure water in a mass ratio of 1:5, the pressure is 0.3 MPa, the temperature is 70°C, the impregnation time is 60 min, and then the finished fabric is subjected to an ultrapure water washing process and a shaping process to obtain the finished fabric;

[0072] S6-3: Cut and seal the finished cloth using a laser, and finally clean the dust-free cloth using ultrapure water and perform vacuum packaging to obtain the antistatic dust-free cloth.

[0073] Comparative Example 1

[0074] No conductive fiber was added, and the remaining steps were the same as those in Example 1.

[0075] Comparative Example 2

[0076] No sericin was added in the preparation of the modified polyester fiber, and the remaining steps were the same as those in Example 1.

[0077] Comparative Example 3

[0078] In the preparation of the modified polyester fiber, polyethylene glycol glycidyl ether was not added, and the remaining steps were consistent with those in Example 1.

[0079] Comparative Example 4

[0080] In the preparation method of the antistatic dust-free cloth, no antistatic impregnation liquid is added, and the remaining steps are consistent with those in Example 1.

[0081] The surface resistivity of the dust-free cloths prepared in the embodiments and comparative examples was tested according to the test standard GB / T 12703.1-2021 “Test method for electrostatic properties of textiles”.

[0082] The experimental data are summarized in the following table:

[0083]

[0084]

[0085] It can be seen from the examples and comparative data that the grey cloth spun and woven using modified polyester fibers and conductive fibers has good anti-static properties, and the anti-static properties are further improved after further treatment with an anti-static impregnation liquid.

[0086] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An antistatic dust-free cloth, characterized in that: The formula of the antistatic dust-free cloth is as follows: by weight, 70 to 80 parts of modified polyester fiber, 20 to 30 parts of conductive fiber, and 170 to 200 parts of antistatic impregnation liquid. Wherein, the preparation method of modified polyester fiber is as follows: S1-1: washing 95 to 105 parts by weight of polyester fibers with deionized water and drying them in a vacuum oven at 60° C. for 6 hours, treating the polyester fibers with plasma, evacuating to absolute vacuum, and introducing nitrogen to keep the pressure constant at 30 Pa, thereby obtaining pretreated polyester fibers; S1-2: adding 10 to 18 parts by weight of sericin to 70 to 100 parts by weight of deionized water at 40 to 50° C., and stirring with ultrasonic waves for 30 minutes to obtain a solution B; S1-3: The pretreated polyester fiber and solution B are mixed, ultrasonically stirred at 60°C for 40 to 50 minutes, sodium hydroxide solution is added dropwise until the pH is 9 to 10, 1.5 to 3 parts by weight of polyethylene glycol glycidyl ether is added, ultrasonically stirred at 70°C for 2 hours, washed with deionized water, and dried in a vacuum drying oven at 60°C to obtain the modified polyester fiber.

2. The antistatic dust-free cloth according to claim 1, characterized in that: In the S1-1, the plasma power is 150-180 W, and the plasma treatment time is 5-10 min.

3. The antistatic dust-free cloth according to claim 1, characterized in that: The stirring speed in S1-2 is 550-650 r / min.

4. The antistatic dust-free cloth according to claim 1, characterized in that: The concentration of the sodium hydroxide solution in S1-3 is 2M.

5. The antistatic dust-free cloth according to claim 1, characterized in that: The preparation method of the conductive fiber is as follows: 30 to 50 parts by weight of carbon fiber is mixed with 90 to 100 parts by weight of a mixed acid solution, wherein the mixed acid solution is a mixture of 2M hydrochloric acid and 3M citric acid in a mass ratio of 1:3, condensed and refluxed for 3 hours, washed with deionized water until the pH of the eluent is about 7, and dried in a vacuum drying oven at 60°C to obtain the conductive fiber.

6. A method for preparing the antistatic dust-free cloth according to claims 1 to 5, characterized in that: The specific steps of the preparation method are as follows: S6-1: blending and weaving the modified polyester fiber and the conductive fiber according to a formula to obtain a grey cloth; S6-2: Infiltrating the embryo in an antistatic impregnation liquid under reduced pressure at a temperature of 60 to 70° C. for 30 to 60 minutes, and then washing with ultrapure water and shaping to obtain a finished fabric; S6-3: Cut and seal the finished cloth using a laser, and finally clean the dust-free cloth using ultrapure water and perform vacuum packaging to obtain the antistatic dust-free cloth.

7. The method for preparing an antistatic dust-free cloth according to claim 6, characterized in that: The grey cloth with a thickness of 0.5 mm is woven in the S6-1.

8. The method for preparing an antistatic dust-free cloth according to claim 6, characterized in that: The antistatic impregnation liquid in S6-2 is a mixture of polyoxyethylene alkylamine and ultrapure water in a mass ratio of (1:2):

10.

9. The method for preparing an antistatic dust-free cloth according to claim 6, characterized in that: In the S6-2, the reduced pressure infiltration pressure is set to 0.3-0.5 MPa.

10. The method for preparing an antistatic dust-free cloth according to claim 6, characterized in that: The resistivity of the ultrapure water is greater than 18 MΩ.

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