Composite fabric for high-grade clean clothes

Abstract

The invention relates to the technical field of clean clothes, in particular to a composite fabric for high-grade clean clothes, which comprises an outer layer of 90g warp-knitted fabric, a middle layer of 15g PI film and an inner layer of 75g warp-knitted base cloth, and the outer layer of 90g warp-knitted fabric, the middle layer of 15g PI film and the inner layer of 75g warp-knitted base cloth are compounded through an adhesive. The fabric is light in gram weight, the inner layer knitted fabric is attached to the skin, comfort is enhanced, the surface density of the middle layer is high, and the fabric quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of clean clothes, in particular to a composite fabric for high-grade clean clothes. Background Art

[0002] Cleanroom clothing refers to clothing worn in clean rooms and related controlled environments to prevent electrostatic discharge from damaging products and to protect the cleanroom environment from meeting cleanliness requirements. It controls the dust generated by the human body to the greatest extent possible, reduces static electricity generated by friction and the adsorption of dust after static electricity is generated on the fabric surface, ensures that the cleanliness of the cleanroom is controllable, and adds cleanliness performance requirements based on anti-static clothing. The clothing fabric has a low dust generation rate and high air particle filtration efficiency, which can effectively control the dust particles on the fabric itself while preventing the dust emitted by the human body from spreading outward.

[0003] Cleanroom clothing must meet the point-to-point resistance of 1*10 in GB 12014-2019 "Protective Clothing Anti-static Clothing" standard 5 -1*10 11 Ω and the charge of the whole garment should not be greater than 0.6μC / set. High-grade clean rooms have higher requirements for the clean performance indicators of clean fabrics. According to the GB 24249-2009 "Anti-static Clean Fabrics" standard, requirements are put forward for clean performance indicators such as dust generation rate and air particle filtration efficiency. The performance requirements are shown in Table 1. The evaluation indicators are: a. Dust generation rate (pieces / min): the number of particles generated by the friction and tumbling of the measured object within a certain period of time. b. Air particle filtration efficiency (%): the reduction rate of a certain number of standard particles after vertically passing through the measured sample under a specified pressure.

[0004]

[0005]

[0006] According to the dust generation rate and air particle (polystyrene particle) filtration efficiency in the GB / T 24249-2009 standard "Anti-static Clean Fabrics", cleanroom clothing fabrics are divided into grades one, two and three, but the cleanroom environment grades applicable to each grade of cleanroom clothing fabrics are not clearly stated.

[0007] At present, the filtration efficiency of clean clothing fabrics produced in Japan for magnetic head production environment (ISO 4, Class 100 clean room) is 65%-85% (based on IEST RP-CC003 test). Combined with the difference in filtration efficiency test between GB / T 24249-2009 and IEST RP-CC003, as well as the classification of fabrics in GB / T 24249-2009, it can be considered that it is more reasonable for Class 1 clean rooms to be equipped with fabrics with an air particle filtration efficiency of 65%, and for Class 10 clean rooms to be equipped with fabrics with an air particle filtration efficiency of 50%.

[0008] The current fabrics on the market are: 75D / 100D / 150D*75D / 100D / 150D, 98-99% polyester*1-2% conductive fiber, 90-150g in weight, mainly woven fabrics. Under a pressure difference of 98Pa, the aerosol generator produces 0.5μm particles, and the fabrics are tested for passability. The millimeter unit gap of the warp and weft of the woven fabric cannot be compared with the 0.5μm particles at the same level. The measurement range of 0.5μm air filtration efficiency (≥0.5μm) is about 11%-22%, which is difficult to meet the requirements of high-level clean rooms for fabrics with air particle filtration efficiency of 50-65%. Summary of the invention

[0009] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a high-grade clean clothing composite fabric to solve the problem raised in the above-mentioned background technology that the 0.5μm air filtration efficiency (≥0.5μm) of the anti-static woven clean clothing fabric in the current market is measured in the range of about 11%-22%, which is difficult to meet the requirements of high-grade clean rooms to be equipped with fabrics with an air particle filtration efficiency of 50-65%.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A high-grade clean clothing composite fabric comprises: a composite fabric piece, wherein the composite fabric piece comprises an outer layer of 90g warp knitted fabric, a middle layer of 15gPI film and an inner layer of 75g warp knitted base fabric, wherein the outer layer of 90g warp knitted fabric, the middle layer of 15gPI film and the inner layer of 75g warp knitted base fabric are composited by an adhesive.

[0012] Preferably: the outer layer 90g warp knitted fabric is 95% polyester*5% conductive fiber.

[0013] Preferably, the outer layer 90g warp knitted fabric has a conductive carbon fiber spacing of 5mm, a width of 170cm, a yarn count of 50D, and a needle number of 28 needles.

[0014] Preferably, the intermediate layer 15gPI film has a high surface density and uniform small pores.

[0015] Preferably, the surface dense layer of the intermediate layer 15gPI film is used to prevent the transmission of 0.5 μm particles.

[0016] Preferably, the inner layer 75g warp knitted base fabric is 100% polyester.

[0017] Preferably, the inner layer 75g warp-knitted base fabric has a width of 170cm, a yarn count of 50D, and 26 needles.

[0018] Preferably: the inner surface of the inner layer 75g warp knitted base fabric is provided with a silver ion antibacterial layer, and the silver ion antibacterial layer is used to prevent cell reproduction to achieve the antibacterial purpose. The outer layer of the outer layer 90g warp knitted fabric is sprayed with PU coating, and the outer layer 90g warp knitted fabric can play a waterproof role through the PU coating.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The manufacturing process of the composite fabric is simplified, easy to control, suitable for large-scale production, and significantly improves production efficiency;

[0021] 2. The inner layer of 75g warp-knitted base fabric is 100% polyester, and the knitted structure is soft and close to the skin, providing excellent comfort. The fabric is highly breathable and suitable for clean clothes that need to be worn for a long time, allowing workers to stay comfortable in a high-cleanliness environment;

[0022] 3. Compared with the existing cleanroom clothing fabrics in China, this composite fabric has a lower dust generation rate and good dust control, and is suitable for environments with extremely high cleanliness requirements, especially in terms of particle control ≥0.3μm, and performs well;

[0023] 4. The overall weight of the composite fabric is relatively light. Under the premise of meeting the high-level requirements of the clean room, it reduces the overall weight of the clothing and reduces the wearer's fatigue, making it suitable for a working environment where it is worn for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the overall cross-section of the present invention;

[0026] Figure 3 For the present invention Figure 2 The structural diagram at A in the middle;

[0027] Figure 4 It is a detailed structural schematic diagram of the inner layer 75g warp knitted base fabric and its inner layer of the present invention.

[0028] In the figure: 1. Composite fabric piece; 11. Outer layer 90g warp knitted fabric; 12. Middle layer 15g PI film; 13. Inner layer 75g warp knitted base fabric. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-4 An embodiment of the present invention provides: a high-grade clean clothing composite fabric, including: a composite fabric piece 01, the composite fabric piece 01 includes an outer layer of 90g warp knitted fabric 11, a middle layer of 15gPI film 12 and an inner layer of 75g warp knitted base fabric 13, and the outer layer of 90g warp knitted fabric 11, the middle layer of 15gPI film 12 and the inner layer of 75g warp knitted base fabric 13 are composited by an adhesive.

[0031] The outer layer 90g warp knitted fabric 11 is 95% polyester*5% conductive fiber.

[0032] The outer layer is 90g warp knitted fabric with 11 conductive carbon fibers at a spacing of 5mm, a width of 170cm, a yarn count of 50D, and 28 needles.

[0033] The intermediate layer 15gPI film 12 has a high surface density and uniform small pores.

[0034] The surface dense layer of the middle layer 15gPI film 12 is used to prevent the transmission of 0.5μm particles.

[0035] The inner 75g tricot base fabric 13 is 100% polyester.

[0036] The inner layer is 75g warp knitted base fabric 13 with a width of 170cm, a yarn count of 50D, and 26 needles.

[0037] A silver ion antibacterial layer is arranged on the inner surface of the inner layer 75g warp knitted base fabric 13. The silver ion antibacterial layer is used to inhibit the reproduction and survival of bacteria to achieve the antibacterial purpose. The silver ion antibacterial layer can not only inhibit the growth of bacteria, molds and viruses, but also has a long-lasting antibacterial effect, which can prevent the wearer's own bacteria from spreading to the clean clothes, thereby preventing bacteria from multiplying on the clean clothes. Silver ions can combine with sulfur-based proteins on the cell walls, destroy the integrity of the cell walls, cause the cell contents to leak, and then die. The silver ion-containing coating liquid is evenly coated on the inner surface of the 75g warp knitted base fabric 13. The coating liquid usually uses a polymer matrix (such as polyurethane or acrylic acid) as a carrier and a silver-carrying compound (such as nanosilver particles or silver salt) as an antibacterial component. The specific steps are: 1. 75g of warp knitted base fabric 13 enters the coating process line through a coating device; 2. When coating the silver ion solution, ensure that the coating is uniform and of moderate thickness; 3. After coating, heat to an appropriate temperature (such as 80-100°C) through a drying device to solidify the coating and tightly adhere to the surface of the base fabric. The outer layer of the outer layer 90g of the warp knitted fabric 11 is sprayed with a PU coating, and the outer layer 90g of the warp knitted fabric 11 can play a waterproof role through the PU coating;

[0038] Among them, PU coating, polyurethane (PU) coating is a high-performance coating material widely used on textiles, with good waterproof, oil-proof, wear-resistant and chemical resistance. PU coating can not only provide excellent waterproof performance, but also maintain a certain degree of air permeability and softness, and is suitable for the manufacture of various types of protective clothing and clean clothing; the specific spraying process is:

[0039] 1. Prepare PU solution: Choose a suitable PU coating, usually a liquid PU solution dissolved in an aqueous or solvent medium. According to the application requirements of the fabric, the concentration and viscosity of the PU solution can be adjusted to obtain the best coating effect. An appropriate amount of cross-linking agent or additive can be added to enhance the durability and adhesion of the coating.

[0040] 2. Fabric pretreatment: Before spraying PU coating, the outer 90g warp knitted fabric needs to be pretreated, such as cleaning, decontamination or drying, to ensure that there is no dust, grease or other impurities on the surface of the fabric that affect adhesion. For some fabrics, surface treatment (such as plasma treatment) can be performed to increase the adhesion of the coating.

[0041] 3. Spraying equipment preparation: Use automated spraying equipment or high-pressure spraying machine, adjust the spraying pressure and nozzle diameter, so that the sprayed PU liquid can be evenly distributed on the surface of the fabric. The choice of pressure and nozzle depends on the viscosity of the PU coating and the requirements of the fabric. During the spraying process, the thickness and uniformity of the coating can be controlled.

[0042] 4. Spray PU coating: Spread the outer 90g warp knitted fabric flat on the workbench or hang it on the conveyor belt of the automatic sprayer. Turn on the spraying equipment and spray the PU solution evenly on the front of the fabric. You can spray multiple layers according to your needs to achieve better waterproof effect. During the spraying process, the operating environment should be kept clean to prevent impurities from contaminating the coating.

[0043] 5. Drying and curing: After spraying, the fabric needs to be dried and cured. Usually, it is quickly dried at 60℃-120℃ by hot air drying equipment, or naturally air dried to ensure that the PU coating is completely cured. The cured PU coating can be firmly attached to the surface of the fabric to form a uniform waterproof film.

[0044] Working principle: The outer layer 90g warp knitted fabric 11, the inner layer 75g warp knitted base fabric 13 and the composite fabric piece 01 were tested for point-to-point resistance, whole garment charge, dust generation rate and air particle filtration efficiency according to GB24249-2009 "Anti-static Clean Fabric" standard. The results are as follows:

[0045] Fabric cleanliness performance test

[0046]

[0047] The above performance test results show that the composite fabrics for high-grade clean rooms basically meet the point-to-point static electricity 1*10 in the GB 12014-2019 "Protective Clothing Anti-static Clothing" standard. 5 -1*10 11 The Ω and the charge of the whole garment should not be greater than 0.6μC / set, and the dust generation rate (≥0.3μm) and air particle filtration efficiency (0.5μm) level 1 cleanliness requirements in the GB24249-2009 "Anti-static Clean Fabrics" standard are applicable to clean clothing fabrics in Class 100 and above areas of the electronics industry.

[0048] The composite process of the composite fabric is as follows: the inner layer 75g warp knitted base fabric 13 and the middle layer 15g PI film 12 are unwound at a speed of 5m / min on the unwinding machine respectively. After entering the composite machine, the fabric is fed under a pressure of 5t, the gluing temperature is 110°C, and the inner layer 75g warp knitted base fabric 13 is coated with glue. The cloth winding speed is 5m / min, the reel sample cooling and curing temperature is 25°C, and the curing time is 2h; after curing, the double-layer fabric and the outer layer 90g warp knitted fabric 11 are unwound at a speed of 5m / min on the unwinding machine respectively, and the steps are the same as above. The gluing position is in the inner layer of the double-layer fabric. After curing, a three-layer composite fabric is obtained, that is, the composite fabric piece 01 (such as Figure 3 shown).

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A high-grade clean clothing composite fabric, characterized in that: include: A composite fabric piece (01), the composite fabric piece (01) comprising an outer layer of 90g warp knitted fabric (11), an intermediate layer of 15g PI film (12) and an inner layer of 75g warp knitted base fabric (13), the outer layer of 90g warp knitted fabric (11), the intermediate layer of 15g PI film (12) and the inner layer of 75g warp knitted base fabric (13) being bonded together by an adhesive.

2. The high-grade clean clothing composite fabric according to claim 1, characterized in that: The outer layer 90g warp knitted fabric (11) is 95% polyester*5% conductive fiber.

3. The high-grade clean clothing composite fabric according to claim 2, characterized in that: The outer layer 90g warp knitted fabric (11) has a conductive carbon fiber spacing of 5mm, a width of 170cm, a yarn count of 50D, and a needle number of 28.

4. The high-grade clean clothing composite fabric according to claim 1, characterized in that: The intermediate layer 15gPI film (12) has a high surface density and uniform small pores.

5. The high-grade clean clothing composite fabric according to claim 4, characterized in that: The surface dense layer of the intermediate layer 15gPI film (12) is used to prevent the transmission of 0.5 μm particles.

6. The high-grade clean clothing composite fabric according to claim 1, characterized in that: The inner layer 75g warp knitted base fabric (13) is 100% polyester.

7. The high-grade clean clothing composite fabric according to claim 6, characterized in that: The inner layer 75g warp knitted base fabric (13) has a width of 170cm, a yarn count of 50D, and a needle count of 26.

8. The high-grade clean clothing composite fabric according to claim 1, characterized in that: The inner surface of the inner layer 75g warp knitted base fabric (13) is provided with a silver ion antibacterial layer, and the silver ion antibacterial layer is used to inhibit bacterial reproduction and survival to achieve the antibacterial purpose. The outer layer of the outer layer 90g warp knitted fabric (11) is sprayed with a PU coating, and the outer layer 90g warp knitted fabric (11) can play a waterproof role through the PU coating.

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