A washable dust suit and its application

Abstract

This invention discloses a washable cleanroom garment and its application. The washable cleanroom garment includes a jacket and trousers. The jacket has a hood at the top and sleeves on both sides with elastic cuffs. The front of the jacket has Velcro closures, and the trousers have elastic cuffs at the bottom. The jacket, trousers, and hood are all made of antistatic fabric, which is composed of a base fabric and an antistatic liquid. The raw materials for preparing the antistatic liquid, by weight, are: 1-10 parts antibacterial agent, 1-10 parts antistatic agent, 20-60 parts matrix polymer, 2-10 parts curing agent, and 0.1-5 parts dispersant. After 50 washes, the washable cleanroom garment of this invention has an antibacterial rate as high as 94% and a surface resistivity of only 4.5 × 10⁻⁶. 6 Ω / m 2 The static voltage of the friction is 24V, which fully meets the relevant standards for Class A antistatic cleanroom fabrics.

Description

Technical Field

[0001] This invention relates to the field of cleanroom textile technology, classified under D06M15 / 564, specifically to a washable cleanroom garment and its application. Background Technology

[0002] Currently, the cleanroom suits used in cleanrooms on the market are all made of polyester long fibers with a resistivity of 1.0×10⁻⁶. 5 Ω-1.0×10 9 It is woven from Ω-weight antistatic carbon fiber and meets the relevant standards of GB / T 24249-2009 for antistatic cleanroom fabrics. Generally, this fabric can achieve a resistivity of 1.0 × 10⁻⁶. 5 Ω-1.0×10 9 The resistance of the fabric should be between Ω and the static voltage of friction should be <200V. However, to achieve Class A cleanroom conditions, the fabric's resistance needs to be between 1.0 × 10⁻⁶ after 50 washes. 5 Ω-1.0×10 9 Finding the voltage between Ω and the friction voltage of <50V presents a significant challenge.

[0003] Currently, most antistatic cleanroom fabrics are treated with antistatic liquid immersion. Although this method can reduce the surface resistance and triboelectric voltage of the fabric to a certain extent, its washability is poor. This is mainly because most high-performance antistatic liquids are cationic, which have poor compatibility with ordinary PU resin, resulting in problems such as low fastness and a sharp decline in antistatic performance after washing.

[0004] The article "Research and Development of High-Efficiency Antistatic Cleanroom Clothing Fabric" published in the second issue of "Dyeing and Printing" in 2010 describes the use of polyethylene glycol 200 dimethacrylate hydrophilic monomer, crosslinking agent ethylene glycol dimethacrylate, and photoinitiator 1173 to treat the fabric. After modification, the fabric has good performance, but no other properties.

[0005] Patent CN107059398B discloses a coating adhesive for polyester cleanroom garment fabric and its preparation method. The coating adhesive is composed of diphenylmethane diisocyanate, polyethylene glycol and polybutadiene diol, styrene, chloroprene rubber, methacryloyl chloride and trimethylammonium chloride, etc., and is applied to polyester conductive fabric by coating process, giving it excellent antibacterial, antistatic and washable properties. However, after 15 washes, the static voltage is as high as 798V, and its washability needs to be improved. Summary of the Invention

[0006] To address the aforementioned problems, a first aspect of the present invention provides a washable cleanroom garment, comprising a jacket and trousers. The jacket has a hood at its upper end, sleeves on both sides of the jacket with elastic cuffs, and Velcro closures at the front of the jacket. The trousers also have elastic cuffs at their lower ends. The jacket, trousers, and hood are all made of antistatic fabric, which is composed of a base fabric and an antistatic liquid. The raw materials for preparing the antistatic liquid, by weight, include: 1-10 parts of antibacterial agent, 1-10 parts of antistatic agent, 20-60 parts of matrix polymer, 2-10 parts of curing agent, and 0.1-5 parts of dispersant.

[0007] More preferably, the raw materials for preparing the antistatic liquid, by weight, are: 4-8 parts antibacterial agent, 5-9 parts antistatic agent, 40-60 parts matrix polymer, 3-6 parts curing agent, and 1-3 parts dispersant.

[0008] More preferably, the raw materials for preparing the antistatic liquid, by weight, are: 6 parts antibacterial agent, 8 parts antistatic agent, 50 parts matrix polymer, 5 parts curing agent, and 2 parts dispersant.

[0009] More preferably, the curing agent includes at least one of aliphatic curing agents, polyamide curing agents, and aromatic curing agents, and the dispersant is a polymer.

[0010] More preferably, the curing agent is an aliphatic curing agent, and the aliphatic curing agent is isophorone diamine.

[0011] Preferably, the antibacterial agent is silver nanoparticles and nano-titanium dioxide, with a mass ratio of (2-5):1.

[0012] More preferably, the antibacterial agent is silver nanoparticles and nano-titanium dioxide, with a mass ratio of (2-4):1.

[0013] More preferably, the antibacterial agent is silver nanoparticles and nano-titanium dioxide, with a mass ratio of 3:1.

[0014] More preferably, the average particle size of the silver nanoparticles is 20 nm, and the average particle size of the nano-titanium dioxide is 60 nm.

[0015] Preferably, the antistatic agent is a polymeric antistatic agent and a carbon-based filler.

[0016] Preferably, the mass ratio of the polymeric antistatic agent to the carbon-based filler is (4-6):1.

[0017] More preferably, the mass ratio of the polymeric antistatic agent to the carbon-based filler is (4-5):1.

[0018] More preferably, the mass ratio of the polymeric antistatic agent to the carbon-based filler is 4:1.

[0019] Preferably, the polymeric antistatic agent is a quaternary ammonium salt type polymeric antistatic agent.

[0020] More preferably, the polymeric antistatic agent is a hyperbranched polyester quaternary ammonium salt antistatic agent.

[0021] Preferably, the carbon-based filler is carbon black, and the carbon black has an average particle size of 5-20 nm and a resistivity of ≤0.8 Ω·m.

[0022] More preferably, the carbon-based filler is carbon black, the carbon black having an average particle size of 6-18 nm and a resistivity of ≤0.6 Ω·m.

[0023] More preferably, the filler is carbon black, the average particle size of which is 9-17 nm and the resistivity is ≤0.5 Ω·m.

[0024] Preferably, the matrix polymer includes at least one of polyurethane resin, epoxy resin, acrylic resin, butyl rubber, vinyl acetate resin, and chlorinated rubber.

[0025] More preferably, the matrix polymer is a polyurethane resin and an epoxy resin, with a mass ratio of (1-2):1, and the epoxy resin has a molecular weight of 100-500 g / mol.

[0026] More preferably, the matrix polymer is a polyurethane resin and an epoxy resin in a mass ratio of 1:1, and the epoxy resin has a molecular weight of 455 g / mol.

[0027] Preferably, the raw materials for preparing the antistatic layer also include 0.1-3 parts by weight of a coupling agent.

[0028] More preferably, the raw materials for preparing the antistatic layer also include 1-2 parts by weight of a coupling agent.

[0029] More preferably, the raw materials for preparing the antistatic layer also include 1.5 parts by weight of a coupling agent.

[0030] Preferably, the coupling agent includes at least one of carbonate coupling agents, silane coupling agents, aluminate coupling agents, bimetallic coupling agents, phosphate coupling agents, and borate coupling agents.

[0031] More preferably, the coupling agent is a silane coupling agent.

[0032] The present invention also provides a method for preparing a hyperbranched polyester quaternary ammonium salt antistatic agent, comprising: adding hyperbranched polyester and DMF to a reactor, then adding sodium hydroxide, then adding epichlorohydrin dropwise, reacting for a period of time, filtering, and then adding hexadecyl dimethyl tertiary amine, and the reaction is completed.

[0033] More preferably, the molar ratio of the hyperbranched polyester to epichlorohydrin is 1:10.

[0034] This invention also provides a method for preparing an antistatic fabric, comprising the following steps:

[0035] (1) Silver nanoparticles, nano titanium dioxide, carbon black and coupling agent are mixed in parts by weight to prepare a first solution, and then a polymeric antistatic agent, matrix polymer, curing agent and the first solution are mixed to prepare a second solution.

[0036] (2) The base fabric is treated by a plasma surface treatment machine and then dried. The base fabric is then subjected to two dips and two rolls with a second solution. The roll residue of the base fabric is 60-80%. After that, it is dried in an oven at a temperature of 80-90℃ for 3-5 minutes to obtain the final product.

[0037] More preferably, the base fabric is polyester.

[0038] A second aspect of the present invention provides an application of washable cleanroom garments in cleanrooms.

[0039] Generally, smaller carbon black particle size results in lower resistivity, which is more conducive to improving the antistatic properties of fabric surfaces. However, when the applicant added carbon black with an average particle size of 9-17 nm and a resistivity ≤0.5 Ω·m, the antistatic properties actually decreased. It is speculated that this might be because the small particle size of the carbon black makes it prone to agglomeration. After consideration, the applicant added a silane coupling agent, limiting its weight to 1-2 parts. Under the combined action of the hyperbranched polyester quaternary ammonium salt antistatic agent, the surface resistivity of the fabric was reduced to 2 × 10⁻⁶. 6 Ω / m 2 The static voltage dropped to 20V, unexpectedly improving the washability. This may be due to two factors: firstly, the silane coupling agent promoted the compatibility of carbon black, polyurethane resin, and epoxy resin, forming a three-dimensional conductive network; secondly, the hyperbranched structure of the hyperbranched polyester quaternary ammonium salt antistatic agent could form a network film, increasing the contact area with the fibers. The ester groups present in the branches also promoted its compatibility with polyurethane resin and polyester fibers, resulting in the antistatic fabric having a surface resistivity of only 4.5×10⁻⁶ after 50 washes. 6 Ω / m 2 The static voltage of the friction is 24V.

[0040] To impart antibacterial properties to the antistatic fabric, the applicant added nano-titanium dioxide and silver nanoparticles. While this improved the antibacterial properties to some extent, the effect was not significant. Therefore, the applicant further specified the average particle sizes of the silver nanoparticles and nano-titanium dioxide to be 20 nm and 60 nm, respectively, with a mass ratio of (2-4):1. This allows the nano-titanium dioxide and silver nanoparticles to be encapsulated in the resin, preventing oxidation of the silver nanoparticles. Consequently, the antibacterial rate of the antistatic fabric increased to 96%, and its antistatic properties were unexpectedly improved. This is likely due to the good properties of 20 nm silver nanoparticles. The conductivity of the material, under the action of the silane coupling agent, is better compatible with polyurethane resin and epoxy resin, thereby improving the antistatic performance of the antistatic fabric. However, after 50 washes, the antibacterial rate of the antistatic fabric decreases significantly. After extensive research, the applicant first treated the base fabric with plasma surface treatment and unexpectedly found that the antistatic fabric had an antibacterial rate of up to 94% after 50 washes. This may be because the surface of the polyester fiber after plasma treatment forms uniform and dense grooves, increasing the specific surface area. Under the action of the coupling agent, the adhesion to the surface of the polyester fiber is enhanced, resulting in an antibacterial rate of up to 94% after 50 washes.

[0041] Beneficial effects: The washable cleanroom garment prepared by this invention has a surface resistivity as low as 2×10⁻⁶. 6 Ω / m 2 With a static voltage of 20V, it boasts an antibacterial rate of up to 96%, and after 50 washes, its antibacterial rate reaches 94%, while its surface resistivity is only 4.5×10⁻⁶. 6 Ω / m 2 The frictional static voltage is 24V, which fully meets the relevant standards for Class A antistatic cleanroom fabrics. It can be used in occasions with strict requirements for antibacterial and antistatic properties, such as biological cleanrooms in microbial engineering. In addition, the production process and cost of the washable cleanroom garment of this invention are relatively low, making it economical and practical. Example

[0042] Example 1

[0043] A washable cleanroom garment includes a top and trousers. The top has a hood at the top and sleeves on both sides with elastic cuffs. The front of the top has Velcro closures, and the trousers have elastic cuffs at the bottom. The top, trousers, and hood are all made of antistatic fabric. The antistatic fabric is composed of a base fabric and an antistatic liquid. The raw materials for preparing the antistatic liquid, by weight, include: 6 parts antibacterial agent, 8 parts antistatic agent, 50 parts matrix polymer, 5 parts curing agent, 2 parts dispersant, and 1.5 parts coupling agent.

[0044] The antibacterial agent, silver nanoparticles and nano-titanium dioxide, are present in a mass ratio of 3:1. The silver nanoparticles have an average particle size of 20 nm and were purchased from Beijing Zhongke Keyou Technology Co., Ltd. The nano-titanium dioxide has an average particle size of 60 nm, is of model HN-TA60, and was purchased from Hangzhou Hengna New Materials Co., Ltd.

[0045] The antistatic agent is a hyperbranched polyester quaternary ammonium salt antistatic agent and carbon black, with a mass ratio of 4:1. The carbon black has an average particle size of 9-17 nm and a resistivity ≤0.5 Ω·m, and was purchased from Tianjin Yiborui Chemical Co., Ltd., model F900B. The preparation method of the hyperbranched polyester quaternary ammonium salt antistatic agent includes adding hyperbranched polyester and 50 mL of DMF to a reactor, then adding 2 mL of 0.05% sodium hydroxide, followed by dropwise addition of epichlorohydrin. After reacting at 80°C for 7 h, the mixture is filtered, and then 5 mL of 1 mol / L hexadecyl dimethyl tertiary amine is added. The mixture is then reacted at 160°C for 3 h to obtain the final product. The molar ratio of the hyperbranched polyester to epichlorohydrin is 1:10. The hyperbranched polyester was purchased from Wuhan Hyperbranched Resin Technology Co., Ltd., model HyPer H10.

[0046] The matrix polymer is a polyurethane resin and an epoxy resin in a mass ratio of 1:1. The epoxy resin has a molecular weight of 455 g / mol. The polyurethane resin is purchased from Dow Chemical Company, USA, and is designated as Coreactant CR3A. The epoxy resin is designated as E44 epoxy resin.

[0047] The curing agent is isophorone diamine.

[0048] The dispersant is a high molecular weight polymer purchased from Clariant, model number Dispersogen PTS.

[0049] The coupling agent is KH550.

[0050] This embodiment also provides a method for preparing antistatic fabric, including the following steps:

[0051] (1) Silver nanoparticles, nano titanium dioxide, carbon black and coupling agent are stirred at 800 rpm / min for 10 min according to the weight to prepare the first solution. Then, polymeric antistatic agent, matrix polymer, curing agent and the first solution are stirred at the same speed for 20 min to prepare the second solution.

[0052] (2) The base fabric is treated by a plasma surface treatment machine and dried at 50°C. Then, the base fabric is subjected to two dips and two rolls with a second solution. The roll residue of the base fabric is 70%. After that, it is dried in an oven at 80°C for 4 minutes to obtain the final product.

[0053] Example 2

[0054] A washable cleanroom garment includes a top and trousers. The top has a hood at the top and sleeves on both sides with elastic cuffs. The front of the top has Velcro closures, and the trousers have elastic cuffs at the bottom. The top, trousers, and hood are all made of antistatic fabric. The antistatic fabric is composed of a base fabric and an antistatic liquid. The raw materials for preparing the antistatic liquid, by weight, include: 10 parts antibacterial agent, 10 parts antistatic agent, 60 parts matrix polymer, 6 parts curing agent, 3 parts dispersant, and 5 parts coupling agent.

[0055] The antibacterial agent, silver nanoparticles and nano-titanium dioxide, are present in a mass ratio of 3:1. The silver nanoparticles have an average particle size of 20 nm and were purchased from Beijing Zhongke Keyou Technology Co., Ltd. The nano-titanium dioxide has an average particle size of 60 nm, is of model HN-TA60, and was purchased from Hangzhou Hengna New Materials Co., Ltd.

[0056] The antistatic agent is a hyperbranched polyester quaternary ammonium salt antistatic agent and carbon black. The carbon black has an average particle size of 9-17 nm and a resistivity ≤0.5 Ω·m, and was purchased from Tianjin Yiborui Chemical Co., Ltd., model F900B. The preparation method of the hyperbranched polyester quaternary ammonium salt antistatic agent includes adding hyperbranched polyester and 50 mL of DMF to a reactor, then adding 2 mL of 0.05% sodium hydroxide, followed by dropwise addition of epichlorohydrin. After reacting at 80°C for 7 h, the mixture is filtered, and then 5 mL of 1 mol / L hexadecyl dimethyl tertiary amine is added. The mixture is then reacted at 160°C for 3 h to obtain the final product. The molar ratio of the hyperbranched polyester to epichlorohydrin is 1:10. The hyperbranched polyester was purchased from Wuhan Hyperbranched Resin Technology Co., Ltd., model HyPer H10.

[0057] The matrix polymer is a polyurethane resin and an epoxy resin in a mass ratio of 1:1. The epoxy resin has a molecular weight of 455 g / mol. The polyurethane resin is purchased from Dow Chemical Company, USA, and is designated as Coreactant CR3A. The epoxy resin is designated as E44 epoxy resin.

[0058] The curing agent is isophorone diamine.

[0059] The dispersant is a high molecular weight polymer purchased from Clariant, model number Dispersogen PTS.

[0060] The coupling agent is KH550.

[0061] This embodiment also provides a method for preparing antistatic fabric, including the following steps:

[0062] (1) Silver nanoparticles, nano titanium dioxide, carbon black and coupling agent are stirred at 800 rpm / min for 10 min according to the weight to prepare the first solution. Then, polymeric antistatic agent, matrix polymer, curing agent and the first solution are stirred at the same speed for 20 min to prepare the second solution.

[0063] (2) The base fabric is treated by a plasma surface treatment machine and dried at 50°C. Then, the base fabric is subjected to two dips and two rolls with a second solution. The roll residue of the base fabric is 70%. After that, it is dried in an oven at 80°C for 4 minutes to obtain the final product.

[0064] Example 3

[0065] A washable cleanroom garment includes a top and trousers. The top has a hood at the top and sleeves on both sides with elastic cuffs. The front of the top has Velcro closures, and the trousers have elastic cuffs at the bottom. The top, trousers, and hood are all made of antistatic fabric. The antistatic fabric is composed of a base fabric and an antistatic liquid. The raw materials for preparing the antistatic liquid, by weight, include: 4 parts antibacterial agent, 5 parts antistatic agent, 40 parts matrix polymer, 3 parts curing agent, 1 part dispersant, and 1 part coupling agent.

[0066] The antibacterial agent, silver nanoparticles and nano-titanium dioxide, are present in a mass ratio of 3:1. The silver nanoparticles have an average particle size of 20 nm and were purchased from Beijing Zhongke Keyou Technology Co., Ltd. The nano-titanium dioxide has an average particle size of 60 nm, is of model HN-TA60, and was purchased from Hangzhou Hengna New Materials Co., Ltd.

[0067] The antistatic agent is a hyperbranched polyester quaternary ammonium salt antistatic agent and carbon black. The carbon black has an average particle size of 9-17 nm and a resistivity ≤0.5 Ω·m, and was purchased from Tianjin Yiborui Chemical Co., Ltd., model F900B. The preparation method of the hyperbranched polyester quaternary ammonium salt antistatic agent includes adding hyperbranched polyester and 50 mL of DMF to a reactor, then adding 2 mL of 0.05% sodium hydroxide, followed by dropwise addition of epichlorohydrin. After reacting at 80°C for 7 h, the mixture is filtered, and then 5 mL of 1 mol / L hexadecyl dimethyl tertiary amine is added. The mixture is then reacted at 160°C for 3 h to obtain the final product. The molar ratio of the hyperbranched polyester to epichlorohydrin is 1:10. The hyperbranched polyester was purchased from Wuhan Hyperbranched Resin Technology Co., Ltd., model HyPer H10.

[0068] The matrix polymer is a polyurethane resin and an epoxy resin in a mass ratio of 1:1. The epoxy resin has a molecular weight of 455 g / mol. The polyurethane resin is purchased from Dow Chemical Company, USA, and is designated as Coreactant CR3A. The epoxy resin is designated as E44 epoxy resin.

[0069] The curing agent is isophorone diamine.

[0070] The dispersant is a high molecular weight polymer purchased from Clariant, model number Dispersogen PTS.

[0071] The coupling agent is KH550.

[0072] This embodiment also provides a method for preparing antistatic fabric, including the following steps:

[0073] (1) Silver nanoparticles, nano titanium dioxide, carbon black and coupling agent are stirred at 800 rpm / min for 10 min according to the weight to prepare the first solution. Then, polymeric antistatic agent, matrix polymer, curing agent and the first solution are stirred at the same speed for 20 min to prepare the second solution.

[0074] (2) The base fabric is treated by a plasma surface treatment machine and dried at 50°C. Then, the base fabric is subjected to two dips and two rolls with a second solution. The roll residue of the base fabric is 70%. After that, it is dried in an oven at 80°C for 4 minutes to obtain the final product.

[0075] Comparative Example 1

[0076] A washable cleanroom garment includes a top and trousers. The top has a hood at the top and sleeves on both sides with elastic cuffs. The front of the top has Velcro closures, and the trousers have elastic cuffs at the bottom. The top, trousers, and hood are all made of antistatic fabric. The antistatic fabric is composed of a base fabric and an antistatic liquid. The raw materials for preparing the antistatic liquid, by weight, include: 10 parts antibacterial agent, 10 parts antistatic agent, 50 parts matrix polymer, 5 parts curing agent, 2 parts dispersant, and 1.5 parts coupling agent.

[0077] The antibacterial agent, silver nanoparticles and nano-titanium dioxide, are present in a mass ratio of 3:1. The silver nanoparticles have an average particle size of 20 nm and were purchased from Beijing Zhongke Keyou Technology Co., Ltd. The nano-titanium dioxide has an average particle size of 60 nm, is of model HN-TA60, and was purchased from Hangzhou Hengna New Materials Co., Ltd.

[0078] The antistatic agent is carbon black, with an average particle size of 9-17 nm and a resistivity ≤0.5 Ω·m.

[0079] The matrix polymer is a polyurethane resin and an epoxy resin in a mass ratio of 1:1. The epoxy resin has a molecular weight of 455 g / mol. The polyurethane resin is purchased from Dow Chemical Company, USA, and is designated as Coreactant CR3A. The epoxy resin is designated as E44 epoxy resin.

[0080] The curing agent is isophorone diamine.

[0081] The dispersant is a high molecular weight polymer purchased from Clariant, model number Dispersogen PTS.

[0082] The coupling agent is KH550.

[0083] This embodiment also provides a method for preparing antistatic fabric, including the following steps:

[0084] (1) Silver nanoparticles, nano titanium dioxide, carbon black and coupling agent are stirred at 800 rpm / min for 10 min according to the weight to prepare the first solution. Then, polymeric antistatic agent, matrix polymer, curing agent and the first solution are stirred at the same speed for 20 min to prepare the second solution.

[0085] (2) The base fabric is treated by a plasma surface treatment machine and dried at 50°C. Then, the base fabric is subjected to two dips and two rolls with a second solution. The roll residue of the base fabric is 70%. After that, it is dried in an oven at 80°C for 4 minutes to obtain the final product.

[0086] Comparative Example 2

[0087] A washable cleanroom garment includes a top and trousers. The top has a hood at the top and sleeves on both sides with elastic cuffs. The front of the top has Velcro closures, and the trousers have elastic cuffs at the bottom. The top, trousers, and hood are all made of antistatic fabric. The antistatic fabric is composed of a base fabric and an antistatic liquid. The raw materials for preparing the antistatic liquid, by weight, include: 6 parts antibacterial agent, 8 parts antistatic agent, 50 parts matrix polymer, 5 parts curing agent, 2 parts dispersant, and 1.5 parts coupling agent.

[0088] The antibacterial agent, silver nanoparticles and nano-titanium dioxide, are present in a mass ratio of 3:1. The silver nanoparticles have an average particle size of 20 nm and were purchased from Beijing Zhongke Keyou Technology Co., Ltd. The nano-titanium dioxide has an average particle size of 60 nm, is of model HN-TA60, and was purchased from Hangzhou Hengna New Materials Co., Ltd.

[0089] The antistatic agent is a hyperbranched polyester quaternary ammonium salt antistatic agent and carbon black, with a mass ratio of 4:1. The carbon black has an average particle size of 20-30 nm and a resistivity ≤0.8-1.0 Ω·m, and was purchased from Tianjin Yiborui Chemical Co., Ltd., model F900A. The preparation method of the hyperbranched polyester quaternary ammonium salt antistatic agent includes adding hyperbranched polyester and 50 mL of DMF to a reactor, then adding 2 mL of 0.05% sodium hydroxide, followed by dropwise addition of epichlorohydrin. After reacting at 80°C for 7 h, the mixture is filtered, and then 5 mL of 1 mol / L hexadecyl dimethyl tertiary amine is added. The mixture is then reacted at 160°C for 3 h to obtain the final product. The molar ratio of the hyperbranched polyester to epichlorohydrin is 1:10. The hyperbranched polyester was purchased from Wuhan Hyperbranched Resin Technology Co., Ltd., model HyPer H10.

[0090] The matrix polymer is a polyurethane resin and an epoxy resin in a mass ratio of 1:1. The epoxy resin has a molecular weight of 455 g / mol. The polyurethane resin is purchased from Dow Chemical Company, USA, and is designated as Coreactant CR3A. The epoxy resin is designated as E44 epoxy resin.

[0091] The curing agent is isophorone diamine.

[0092] The dispersant is a high molecular weight polymer purchased from Clariant, model number Dispersogen PTS.

[0093] The coupling agent is KH550.

[0094] This embodiment also provides a method for preparing antistatic fabric, including the following steps:

[0095] (1) Silver nanoparticles, nano titanium dioxide, carbon black and coupling agent are stirred at 800 rpm / min for 10 min according to the weight to prepare the first solution. Then, polymeric antistatic agent, matrix polymer, curing agent and the first solution are stirred at the same speed for 20 min to prepare the second solution.

[0096] (2) The base fabric is treated by a plasma surface treatment machine and dried at 50°C. Then, the base fabric is subjected to two dips and two rolls with a second solution. The roll residue of the base fabric is 70%. After that, it is dried in an oven at 80°C for 4 minutes to obtain the final product.

[0097] Comparative Example 3

[0098] A washable cleanroom garment includes a top and trousers. The top has a hood at the top and sleeves on both sides with elastic cuffs. The front of the top has Velcro closures, and the trousers have elastic cuffs at the bottom. The top, trousers, and hood are all made of antistatic fabric. The antistatic fabric is composed of a base fabric and an antistatic liquid. The raw materials for preparing the antistatic liquid, by weight, include: 10 parts antibacterial agent, 10 parts antistatic agent, 50 parts matrix polymer, 5 parts curing agent, 2 parts dispersant, and 5 parts coupling agent.

[0099] The antibacterial agent, silver nanoparticles and nano-titanium dioxide, are present in a mass ratio of 3:1. The silver nanoparticles have an average particle size of 20 nm and were purchased from Beijing Zhongke Keyou Technology Co., Ltd. The nano-titanium dioxide has an average particle size of 60 nm, is of model HN-TA60, and was purchased from Hangzhou Hengna New Materials Co., Ltd.

[0100] The antistatic agent is a hyperbranched polyester quaternary ammonium salt antistatic agent and carbon black, with a mass ratio of 4:1. The carbon black has an average particle size of 9-17 nm and a resistivity ≤0.5 Ω·m, and was purchased from Tianjin Yiborui Chemical Co., Ltd., model F900B. The preparation method of the hyperbranched polyester quaternary ammonium salt antistatic agent includes adding hyperbranched polyester and 50 mL of DMF to a reactor, then adding 2 mL of 0.05% sodium hydroxide, followed by dropwise addition of epichlorohydrin. After reacting at 80°C for 7 h, the mixture is filtered, and then 5 mL of 1 mol / L hexadecyl dimethyl tertiary amine is added. The mixture is then reacted at 160°C for 3 h to obtain the final product. The molar ratio of the hyperbranched polyester to epichlorohydrin is 1:10. The hyperbranched polyester was purchased from Wuhan Hyperbranched Resin Technology Co., Ltd., model HyPer H10.

[0101] The matrix polymer is a polyurethane resin and an epoxy resin in a mass ratio of 1:1. The epoxy resin has a molecular weight of 455 g / mol. The polyurethane resin is purchased from Dow Chemical Company, USA, and is designated as Coreactant CR3A. The epoxy resin is designated as E44 epoxy resin.

[0102] The curing agent is isophorone diamine.

[0103] The dispersant is a high molecular weight polymer purchased from Clariant, model number Dispersogen PTS.

[0104] The coupling agent is KH550.

[0105] This embodiment also provides a method for preparing antistatic fabric, including the following steps:

[0106] (1) Silver nanoparticles, nano titanium dioxide, carbon black and coupling agent are stirred at 800 rpm / min for 10 min according to the weight to prepare the first solution. Then, polymeric antistatic agent, matrix polymer, curing agent and the first solution are stirred at the same speed for 20 min to prepare the second solution.

[0107] (2) The base fabric is treated by a plasma surface treatment machine and dried at 50°C. Then, the base fabric is subjected to two dips and two rolls with a second solution. The roll residue of the base fabric is 70%. After that, it is dried in an oven at 80°C for 4 minutes to obtain the final product.

[0108] Comparative Example 4

[0109] A washable cleanroom garment includes a top and trousers. The top has a hood at the top and sleeves on both sides with elastic cuffs. The front of the top has Velcro closures, and the trousers have elastic cuffs at the bottom. The top, trousers, and hood are all made of antistatic fabric. The antistatic fabric is composed of a base fabric and an antistatic liquid. The raw materials for preparing the antistatic liquid, by weight, include: 6 parts antibacterial agent, 8 parts antistatic agent, 50 parts matrix polymer, 5 parts curing agent, 2 parts dispersant, and 1.5 parts coupling agent.

[0110] The antibacterial agent, silver nanoparticles and nano-titanium dioxide, are present in a mass ratio of 4:1. The silver nanoparticles have an average particle size of 50 nm and were purchased from Beijing Zhongke Keyou Technology Co., Ltd. The nano-titanium dioxide has an average particle size of 60 nm, is of model HN-TA60, and was purchased from Hangzhou Hengna New Materials Co., Ltd.

[0111] The antistatic agent is a hyperbranched polyester quaternary ammonium salt antistatic agent and carbon black, with a mass ratio of 4:1. The carbon black has an average particle size of 9-17 nm and a resistivity ≤0.5 Ω·m, and was purchased from Tianjin Yiborui Chemical Co., Ltd., model F900B. The preparation method of the hyperbranched polyester quaternary ammonium salt antistatic agent includes adding hyperbranched polyester and 50 mL of DMF to a reactor, then adding 2 mL of 0.05% sodium hydroxide, followed by dropwise addition of epichlorohydrin. After reacting at 80°C for 7 h, the mixture is filtered, and then 5 mL of 1 mol / L hexadecyl dimethyl tertiary amine is added. The mixture is then reacted at 160°C for 3 h to obtain the final product. The molar ratio of the hyperbranched polyester to epichlorohydrin is 1:10. The hyperbranched polyester was purchased from Wuhan Hyperbranched Resin Technology Co., Ltd., model HyPer H10.

[0112] The matrix polymer is a polyurethane resin and an epoxy resin in a mass ratio of 1:1. The epoxy resin has a molecular weight of 455 g / mol. The polyurethane resin is purchased from Dow Chemical Company, USA, and is designated as Coreactant CR3A. The epoxy resin is designated as E44 epoxy resin.

[0113] The curing agent is isophorone diamine.

[0114] The dispersant is a high molecular weight polymer purchased from Clariant, model number Dispersogen PTS.

[0115] The coupling agent is KH550.

[0116] This embodiment also provides a method for preparing antistatic fabric, including the following steps:

[0117] (1) Silver nanoparticles, nano titanium dioxide, carbon black and coupling agent are stirred at 800 rpm / min for 10 min according to the weight to prepare the first solution. Then, polymeric antistatic agent, matrix polymer, curing agent and the first solution are stirred at the same speed for 20 min to prepare the second solution.

[0118] (2) The base fabric is treated by a plasma surface treatment machine and dried at 50°C. Then, the base fabric is subjected to two dips and two rolls with a second solution. The roll residue of the base fabric is 70%. After that, it is dried in an oven at 80°C for 4 minutes to obtain the final product.

[0119] Comparative Example 5

[0120] A washable cleanroom garment includes a top and trousers. The top has a hood at the top and sleeves on both sides with elastic cuffs. The front of the top has Velcro closures, and the trousers have elastic cuffs at the bottom. The top, trousers, and hood are all made of antistatic fabric. The antistatic fabric is composed of a base fabric and an antistatic liquid. The raw materials for preparing the antistatic liquid, by weight, include: 10 parts antibacterial agent, 8 parts antistatic agent, 50 parts matrix polymer, 5 parts curing agent, 2 parts dispersant, and 1.5 parts coupling agent.

[0121] The antibacterial agent, silver nanoparticles and nano-titanium dioxide, are present in a mass ratio of 3:1. The silver nanoparticles have an average particle size of 20 nm and were purchased from Beijing Zhongke Keyou Technology Co., Ltd. The nano-titanium dioxide has an average particle size of 60 nm, is of model HN-TA60, and was purchased from Hangzhou Hengna New Materials Co., Ltd.

[0122] The antistatic agent is a hyperbranched polyester quaternary ammonium salt antistatic agent and carbon black, with a mass ratio of 4:1. The carbon black has an average particle size of 9-17 nm and a resistivity ≤0.5 Ω·m, and was purchased from Tianjin Yiborui Chemical Co., Ltd., model F900B. The preparation method of the hyperbranched polyester quaternary ammonium salt antistatic agent includes adding hyperbranched polyester and 50 mL of DMF to a reactor, then adding 2 mL of 0.05% sodium hydroxide, followed by dropwise addition of epichlorohydrin. After reacting at 80°C for 7 h, the mixture is filtered, and then 5 mL of 1 mol / L hexadecyl dimethyl tertiary amine is added. The mixture is then reacted at 160°C for 3 h to obtain the final product. The molar ratio of the hyperbranched polyester to epichlorohydrin is 1:10. The hyperbranched polyester was purchased from Wuhan Hyperbranched Resin Technology Co., Ltd., model HyPer H10.

[0123] The matrix polymer is a polyurethane resin and an epoxy resin in a mass ratio of 1:1. The epoxy resin has a molecular weight of 455 g / mol. The polyurethane resin is purchased from Dow Chemical Company, USA, and is designated as Coreactant CR3A. The epoxy resin is designated as E44 epoxy resin.

[0124] The curing agent is isophorone diamine.

[0125] The dispersant is a high molecular weight polymer purchased from Clariant, model number Dispersogen PTS.

[0126] The coupling agent is KH550.

[0127] This embodiment also provides a method for preparing antistatic fabric, including the following steps:

[0128] (1) Silver nanoparticles, nano titanium dioxide, carbon black and coupling agent are stirred at 800 rpm / min for 10 min according to the weight to prepare the first solution. Then, polymeric antistatic agent, matrix polymer, curing agent and the first solution are stirred at the same speed for 20 min to prepare the second solution.

[0129] (2) The base fabric is subjected to two dips and two nips using the second solution. The nips are 70% of the base fabric. Then it is dried in an oven at 80°C for 4 minutes to obtain the final product.

[0130] Performance Evaluation

[0131] (1) Surface resistivity test: The surface resistivity of the antistatic fabrics of Examples 1-3 and Comparative Examples 1-5 was tested according to the test standard GB / T 24249-2009. The test results are shown in Table 1.

[0132] (2) Triboelectric voltage test: The triboelectric voltage of the antistatic fabrics of Examples 1-3 and Comparative Examples 1-5 was tested according to the test standard GB / T 12703-91. The test results are shown in Table 1.

[0133] (3) Antibacterial performance test: The test was conducted in accordance with the test standard GB / T 20944.3-2008, and the test results are shown in Table 1.

[0134] (4) Washing resistance test: The antistatic fabrics of Examples 1-3 and Comparative Examples 1-5 were washed 50 times according to the washing method in the test standard GB / T8629-2001. The surface resistivity, tribostatic voltage and antibacterial rate after 50 washes were then tested using the above test standard. The test results are shown in Table 2.

[0135] Table 1

[0136] Test Project <![CDATA[Surface resistivity (Ω / m 2 )]]> Triboelectric voltage (V) Antibacterial rate (%) Example 1 <![CDATA[2×10 6 ]]> 20 96 Example 2 <![CDATA[2.3×10 6 ]]> 22 95 Example 3 <![CDATA[2.4×10 6 ]]> 24 94 Comparative Example 1 <![CDATA[4.6×10 7 ]]> 40 93 Comparative Example 2 <![CDATA[7.8×10 6 ]]> 29 93 Comparative Example 3 <![CDATA[3.5×10 6 ]]> 25 92 Comparative Example 4 <![CDATA[3.9×10 6 ]]> 28 89 Comparative Example 5 <![CDATA[3.7×10 6 ]]> 25 87

[0137] Table 2

[0138] Test Project <![CDATA[Surface resistivity (Ω / m 2 )]]> Triboelectric voltage (V) Antibacterial rate (%) Example 1 <![CDATA[4.5×10 6 ]]> 24 94 Example 2 <![CDATA[4.8×10 6 ]]> 26 92 Example 3 <![CDATA[5.2×10 6 ]]> 27 92 Comparative Example 1 <![CDATA[6.5×10 7 ]]> 43 90 Comparative Example 2 <![CDATA[1.8×10 7 ]]> 37 91 Comparative Example 3 <![CDATA[7.0×10 6 ]]> 30 86 Comparative Example 4 <![CDATA[6.0×10 6 ]]> 32 85 Comparative Example 5 <![CDATA[8.7×10 6 ]]> 33 78

Claims

1. A washable cleanroom garment, characterized in that, The garment includes a top and pants. The top has a hood at the top and sleeves on both sides with elastic cuffs. The front of the top has Velcro closures. The bottom of the pants has elastic cuffs. The top, pants, and hood are all made of antistatic fabric. The antistatic fabric is composed of a base fabric and an antistatic liquid. The raw materials for preparing the antistatic liquid, by weight, include: 6 parts antibacterial agent, 8 parts antistatic agent, 50 parts matrix polymer, 5 parts curing agent, 2 parts dispersant, and 1.5 parts coupling agent. The antibacterial agent silver nanoparticles and nano-titanium dioxide are in a mass ratio of 3:1, and the average particle size of the silver nanoparticles is 20 nm. The antistatic agent is a hyperbranched polyester quaternary ammonium salt antistatic agent and carbon black, with a mass ratio of 4:1 between the hyperbranched polyester quaternary ammonium salt antistatic agent and carbon black. The average particle size of the carbon black is 9-17 nm, and the resistivity is ≤0.5 Ω·m. The preparation method of the hyperbranched polyester quaternary ammonium salt antistatic agent includes adding hyperbranched polyester and 50 mL DMF to a reactor, then adding 2 mL of 0.05% sodium hydroxide, followed by the dropwise addition of epichlorohydrin, reacting at 80°C for 7 h, filtering, adding 5 mL of 1 mol / L hexadecyl dimethyl tertiary amine, and reacting at 160°C for 3 h to obtain the product; The molar ratio of the hyperbranched polyester and epichlorohydrin is 1:

10. The matrix polymer is a polyurethane resin and an epoxy resin in a mass ratio of 1:1, and the epoxy resin has a molecular weight of 455 g / mol. The epoxy resin is epoxy resin E44; The curing agent is isophorone diamine; The dispersant is a high molecular weight polymer purchased from Clariant, model Dispersogen PTS; The coupling agent is KH550.

2. The application of the washable cleanroom garment according to claim 1 in a cleanroom.