Antibacterial and mildew-proof cleaning treatment process for automotive carpet

Abstract

The invention discloses an antibacterial and mildew-proof cleaning treatment process for an automotive carpet, which sequentially comprises the following steps of: spinning and weaving a composite base material: mixing polyester fibers and bamboo charcoal fibers according to the mass ratio of 7: 3, spinning and weaving into a base material layer; constructing a three-dimensional functional layer, compounding a PTFE microporous membrane and an SAP moisture absorption net layer, and then carrying out laser engraving and hot press molding to form a honeycomb micro convex point structure; coating a plant-derived antibacterial coating, namely preparing tea tree antibacterial peptide and a water-based adhesive into slurry according to the ratio of 1: 3, and coating the surfaces of the micro convex points with the slurry by adopting an electrostatic spraying process; performing environment-friendly post-treatment strengthening, and sequentially performing low-temperature plasma activation and fluoride-free hydrophobic finishing. The prepared automobile carpet has excellent antibacterial and mildew-proof performance, the mold inhibition rate is larger than or equal to 98%, the escherichia coli and staphylococcus aureus antibacterial rate is larger than or equal to 90%, the water contact angle is larger than or equal to 120 degrees, the VOC release amount is smaller than 5 mg / m < 3 >, good functions are still kept after multiple times of water washing, and the environment-friendly requirement of automobile interiors is met.

Description

Technical Field

[0001] This invention belongs to the field of automotive carpet treatment technology, specifically, it relates to an antibacterial and anti-mildew cleaning treatment process for automotive carpets. Background Technology

[0002] As a major interior component of a car, car carpets are constantly exposed to a damp, enclosed environment, making them prone to bacterial and mold growth, producing odors, and affecting the air quality and health of passengers. Most existing car carpets are treated with chemical antibacterial agents, which have drawbacks such as the release of volatile organic compounds (VOCs), poor antibacterial durability, and environmental unfriendliness. Furthermore, ordinary carpets often lack the balance between moisture absorption and hydrophobicity, resulting in unsatisfactory mold prevention.

[0003] Currently, although some technologies utilize natural antibacterial ingredients, they suffer from drawbacks such as weak bonding, limited functional layer structure, and insufficient durability. For example, CN201310443159.6 discloses an antibacterial automotive carpet and its preparation method, but it relies on chemically synthesized antibacterial agents and does not construct a multi-dimensional functional layer structure, resulting in limited antibacterial and anti-mildew effects. Therefore, there is an urgent need to develop a manufacturing process for automotive carpets that combines environmental friendliness, multifunctionality, and long-lasting antibacterial and anti-mildew effects. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide an antibacterial and mildew-proof cleaning process for automotive carpets. Through composite substrate design, three-dimensional functional layer construction, plant-derived antibacterial coating application and environmentally friendly post-treatment reinforcement, the problem of poor antibacterial and mildew-proof effects of automotive carpets in the past can be avoided.

[0005] To address the aforementioned technical problems, this invention discloses an antibacterial and anti-mildew cleaning process for automotive carpets, comprising the following steps: Step 1: Composite substrate spinning and weaving. Polyester fiber and bamboo charcoal fiber are mixed at a mass ratio of 7:3 and produced into blended fiber using conventional spinning technology. The spinning temperature of conventional spinning technology is 230-250℃ and the spinning speed is 300r / min. The resulting blended fiber is processed by weaving technology to form a composite substrate layer for automotive carpets. Bamboo charcoal fiber is used to enhance the substrate's ability to absorb odors and moisture in the car. Step 2: Construction of the three-dimensional functional layer. First, a polytetrafluoroethylene (PTFE) microporous membrane with a pore size of 0.1-0.2μm is used as the bottom waterproof membrane. A 1mm thick sodium polyacrylate (SAP) moisture-absorbing mesh layer (SAP's water absorption ratio is ≥300 times its own weight) is then laminated on its surface to form a "waterproof membrane-moisture-absorbing layer" composite structure. Next, a honeycomb-shaped groove is processed on the side of the SAP moisture-absorbing mesh layer away from the waterproof membrane using laser engraving technology. Subsequently, the groove is made into honeycomb-shaped micro-protrusions with a diameter of 0.5mm, a height of 0.3mm, and a spacing of 1mm through hot pressing molding process to obtain the three-dimensional functional layer. Step 3: Plant-derived antibacterial coating application. Plant-derived antibacterial peptides extracted from tea trees are mixed with a water-based environmentally friendly adhesive at a mass ratio of 1:3 to prepare an antibacterial coating slurry. The antibacterial coating slurry is then applied to the micro-bumps of the three-dimensional functional layer obtained in Step 2 using an electrostatic spraying process, with the spraying amount controlled at 8 g / m². 2 The coated structure was then placed in a 50°C environment for low-temperature curing for 15 minutes to form an antibacterial coating layer. Step 4: Environmental post-treatment enhancement. The composite substrate layer-three-dimensional functional layer-antibacterial coating layer composite structure obtained in Step 3 is subjected to the following treatments in sequence: Low-temperature plasma activation: Using air as the processing gas, an atmospheric pressure low-temperature plasma device with a power of 80W is used to activate the surface of the composite structure for 30 seconds. Fluorine-free hydrophobic finishing: A plant-derived hydrophobic agent extracted from palm wax is used. The hydrophobic agent is adhered to the surface of the composite structure through an impregnation process, and then dried in an environment of 60°C for 10 minutes to obtain the finished car carpet. The surface water contact angle of the finished car carpet is ≥120°, the inhibition rate of mold is ≥98%, and the antibacterial rate against Escherichia coli and Staphylococcus aureus is ≥90%.

[0006] Furthermore, in step 1, the blended fiber is woven using plain weave with a weave density of 28 threads / cm × 28 threads / cm to ensure the structural stability and breathability of the composite substrate layer.

[0007] Furthermore, in step 2, the SAP moisture-absorbing mesh layer and the PTFE microporous membrane are composited using a hot melt adhesive bonding process, with a hot melt adhesive coating amount of 5 g / m². 2 The composite temperature is 120℃ to ensure that the two layers are firmly bonded and do not block the pores of the PTFE microporous membrane.

[0008] Furthermore, in step 3, the electrostatic spraying process uses a spraying voltage of 60kV and a spraying distance of 20cm to ensure that the antibacterial coating slurry is evenly distributed on the surface of the micro-bumps, without any missed coating or accumulation.

[0009] Furthermore, in step 4, after low-temperature plasma activation treatment, the number of hydroxyl and carboxyl active groups on the surface fiber of the three-dimensional functional layer increases by ≥20% compared with that before activation, thereby increasing the bonding force between the antibacterial coating layer and the fiber by ≥15%.

[0010] Furthermore, in step 4, the padding process of the plant-derived hydrophobic agent adopts a two-dip, two-roll process, with the roll-off rate controlled at 70%, to ensure that the hydrophobic agent forms a continuous and uniform hydrophobic film on the carpet surface.

[0011] Furthermore, after 5 washes, the residual rate of plant-derived antimicrobial peptides in the antimicrobial coating layer of the finished car carpet is ≥65%, and the antimicrobial rate against common bacteria is still ≥80% after washing; after 20 washes, the inhibition rate against mold is ≥85%, and the antimicrobial rate against Escherichia coli and Staphylococcus aureus is ≥80%.

[0012] Furthermore, the VOC emission of finished automotive carpets is <5mg / m². 3 It meets the environmental protection standards for automotive interiors; and in step 2, the SAP moisture-absorbing mesh layer can control the internal humidity of the carpet to below 50% during the use of the finished carpet.

[0013] Furthermore, in step 3, the mass ratio of plant-derived antimicrobial peptides to water-based environmentally friendly adhesives can be adjusted according to antimicrobial requirements, with an adjustment range of 1:2.5-1:3.5. Simultaneously, the spraying amount of the antimicrobial coating layer is adjusted to 7-9 g / m³. 2 .

[0014] Furthermore, in step 4, the drying process uses hot air circulation drying with a hot air velocity of 1.5 m / s to ensure uniform curing of the hydrophobic agent and to avoid high temperature damage to the fiber structure of the composite substrate layer.

[0015] Compared with the prior art, the present invention can achieve the following technical effects: Through the design of composite substrate, three-dimensional functional layer and plant-derived antibacterial coating, it achieves multi-functional integration of antibacterial, anti-mildew, moisture absorption and hydrophobic properties.

[0016] All ingredients are plant-derived (bamboo charcoal fiber, tea tree antimicrobial peptides, palm wax hydrophobic agent), with VOC release <5mg / m³. 3 It meets the environmental protection standards for automotive interiors.

[0017] The finished carpet exhibits a mold inhibition rate of ≥98% and an antibacterial rate of ≥90% against Escherichia coli and Staphylococcus aureus; after 5 washes, the residual rate of antimicrobial peptides is ≥65%, and the antibacterial rate against common bacteria is ≥80%; after 20 washes, the anti-mold and antibacterial rates remain ≥80%.

[0018] The three-dimensional honeycomb micro-protrusion structure increases the specific surface area and improves the adhesion of the moisture-absorbing and antibacterial coating; the SAP moisture-absorbing mesh layer controls the internal humidity of the carpet to below 50%, effectively preventing mold growth.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the technical effects described above at the same time. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a process flow diagram of the antibacterial and anti-mildew cleaning treatment for car carpets according to an embodiment of the present invention; Figure 2 This is a schematic cross-sectional view of an automotive carpet according to an embodiment of the present invention.

[0021] Figure label: The composite substrate layer 10, the three-dimensional functional layer 20, the polytetrafluoroethylene microporous membrane 21, the sodium polyacrylate moisture-absorbing mesh layer 22, the honeycomb micro-bumps 23, and the plant-derived antibacterial coating 30. Detailed Implementation

[0022] The following will describe in detail the implementation of the present invention with reference to the accompanying drawings and embodiments, so that the process of how the present invention uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0023] Example 1, please refer to Figure 1 , Figure 1 This is a flowchart of the antibacterial and anti-mildew cleaning process for automotive carpets according to an embodiment of the present invention.

[0024] Step 1: Composite substrate spinning and weaving Polyester fiber and bamboo charcoal fiber were accurately weighed at a mass ratio of 7:3 and opened and mixed in a constant temperature and humidity environment (temperature 25±2℃, relative humidity 60±5%). Three-stage mixing was performed using an FA306 drawing frame to ensure a uniformity of mixing (CV value ≤ 3.5%).

[0025] The mixed fibers were spun on a BX301 spinning machine with the following specific process parameters: Spinning temperature: 230℃ for the first stage, 240℃ for the second stage, and 245℃ for the third stage. Spinning speed: 300 r / min. Draft ratio: 3.5. Winding speed: 800 m / min.

[0026] The blended fibers were woven on a GA738 loom using a plain weave structure with a warp density of 28 threads / cm, a weft density of 28 threads / cm, and a width of 150cm to obtain a composite substrate layer with a thickness of 2.5mm.

[0027] Step 2: Construction of 3D Functional Layers First, a waterproof membrane-moisture-absorbing layer is laminated: The PTFE microporous membrane is laid flat, and polyurethane hot melt adhesive is evenly coated using an SL-120 hot melt adhesive coater, with the coating amount precisely controlled at 5g / m². 2 Immediately apply the SAP moisture-absorbing mesh layer (made of SAP resin and polyester staple fiber in a 6:4 ratio via hot air bonding, with a basis weight of 280 g / m²). 2 ) Cover it.

[0028] The RL-302 hot press laminating machine was used to laminate the PTFE microporous membrane at 120℃ and 0.3MPa pressure for 30 seconds, ensuring a lamination strength ≥25N / cm and maintaining the PTFE microporous membrane air permeability at 8500g / m³. 2 ·More than 24h.

[0029] Then, the three-dimensional structure is formed: A YAG-500 laser engraving machine was used to process honeycomb-shaped grooves on the surface of the SAP moisture-absorbing mesh layer. The laser power was 300W, the scanning speed was 200mm / s, and the groove depth was 0.4mm.

[0030] The material was then hot-pressed on an MCP-250 hot press with the following process parameters: upper mold temperature: 135℃; lower mold temperature: 125℃; pressure: 0.8MPa; holding time: 25 seconds.

[0031] It forms regular honeycomb-shaped micro-bumps with a diameter of 0.5 mm, a height of 0.3 mm, and a spacing of 1 mm, with a bump height variation coefficient ≤ 5%.

[0032] Step 3: Apply plant-derived antibacterial coating Preparation of antibacterial coating slurry: Accurately weigh 100g of tea tree antimicrobial peptide, 300g of water-based environmentally friendly adhesive, and 600g of deionized water. First, dissolve the antimicrobial peptide in the deionized water and mechanically stir for 30 minutes (500 rpm). Then add the water-based adhesive and continue stirring for 60 minutes until completely homogeneous. Let it stand for 2 hours to defoam.

[0033] Application was performed using an ASP-200 electrostatic spraying equipment: Spraying voltage: 60kV; Spraying distance: 20cm; Nozzle diameter: 0.8mm; Spray gun movement speed: 0.8m / s; Slurry delivery pressure: 0.3MPa.

[0034] The spraying amount is precisely controlled to 8.0±0.2g / m³ using an online weighing system. 2 It was then cured at 50°C for 15 minutes in a DHG-9030A oven, resulting in a film thickness of approximately 12 μm.

[0035] Step 4: Enhanced Environmental Post-Treatment ① Low-temperature plasma activation: The composite structure was placed in the processing chamber of a PDA-800 atmospheric pressure plasma device, with the following parameters set: Power: 80W; Processing gas: dry clean air, flow rate 25L / min; Electrode spacing: 2mm; Processing time: 30 seconds; Conveyor belt speed: 0.5m / min.

[0036] Proceed to the next step immediately after treatment to avoid recontamination of the surface.

[0037] ② Fluorine-free hydrophobic finish: Preparation of hydrophobic finishing solution: 30% palm wax hydrophobic agent, 1% penetrant JFC, and the remainder is deionized water.

[0038] The rolling mill used a RAPID-350 rolling mill for a two-dip, two-roll process: First dip: room temperature, 30 seconds. First roll: 75% remaining. Second dip: room temperature, 20 seconds. Second roll: 70% remaining.

[0039] Drying was performed at 60℃ for 10 minutes in an M-350 hot air dryer with a hot air velocity of 1.5 m / s and a dehumidification air volume of 800 m³ / s. 3 / h.

[0040] The final cross-section of the car carpet is as follows Figure 2 As shown, the automotive carpet comprises, from the surface layer to the bottom layer, a plant-derived antibacterial coating 30, a three-dimensional functional layer 20, and a composite substrate layer 10. Among them, the composite substrate layer 10 is made of polyester fiber and bamboo charcoal fiber in a mass ratio of 7:3. The bamboo charcoal fiber is used to absorb odors and moisture in the car and improve the substrate's basic anti-mildew ability.

[0041] The three-dimensional functional layer 20 includes a honeycomb-shaped micro-bump structure 23 on the surface, a sodium polyacrylate moisture-absorbing mesh layer 22 in the middle, and a polytetrafluoroethylene microporous membrane 21 at the bottom. The honeycomb-shaped micro-bump structure 23 on the surface is made by laser engraving and hot pressing. The micro-bumps are 0.5 mm in diameter, 0.3 mm in height, and 1 mm apart to reduce the contact area between stains and fibers. The sodium polyacrylate moisture-absorbing mesh layer 22 in the middle is a 1 mm thick sodium polyacrylate (SAP) moisture-absorbing mesh layer with an SAP water absorption ratio ≥ 300 times its own weight, used to quickly absorb infiltrated water stains. The polytetrafluoroethylene microporous membrane 21 at the bottom is a polytetrafluoroethylene (PTFE) microporous membrane with a pore size of 0.1-0.2 μm, which prevents moisture from the chassis from penetrating upward.

[0042] Plant-derived antibacterial coating 30 is made by mixing plant-derived antibacterial peptides and water-based environmentally friendly adhesives in a mass ratio of 1:3. It is applied to the surface of the three-dimensional functional layer by electrostatic spraying, with a spraying amount of 8g / m².2 It is also cured at 50℃ for 15 minutes to set its shape; plant-derived antimicrobial peptides are extracted from tea trees. Example 2:

[0043] Step 1: Optimization of composite substrate spinning and weaving Polyester fiber and bamboo charcoal fiber were mixed at a mass ratio of 7:3, with 0.5% of nano-titanium dioxide antibacterial masterbatch added by weight. Four-stage mixing was performed using an FA306 drawing frame to ensure uniform dispersion of the nanoparticles. The spinning process parameters were adjusted as follows: spinning temperature 235℃ for stage 1, 245℃ for stage 2, and 250℃ for stage 3; spinning speed 320 r / min; draft ratio 3.8; and winding speed 850 m / min. A double-warp, double-weft plain weave was used, with a warp density of 30 ends / cm and a weft density of 30 ends / cm, significantly improving the density and mechanical properties of the substrate.

[0044] Step 2: Optimization of 3D Functional Layer Construction The composite process of PTFE microporous membrane and SAP moisture-absorbing mesh layer was optimized to: hot melt adhesive coating amount 5.5 g / m 2 The composite temperature was 125℃, the composite pressure was 0.35MPa, and the composite time was 35 seconds. The 3D structure forming process employed an improved technique: laser engraving used a double-scan method; the first scan, at 280W power and 250mm / s speed, created pre-etched lines; the second scan, at 320W power and 180mm / s speed, refined the groove to a depth of 0.42mm. Hot pressing employed a stepped pressure increase mode: an initial pressure of 0.5MPa held for 10 seconds, and a final pressure of 1.0MPa held for 20 seconds. The mold temperatures were 140℃ for the upper mold and 130℃ for the lower mold.

[0045] Step 3: Optimization of Plant-Derived Antibacterial Coating Application The antibacterial coating slurry formula was adjusted to: 107g tea tree antibacterial peptide, 300g water-based environmentally friendly adhesive, 0.4g silicone defoamer, and 592.6g deionized water. The preparation process was improved: first, the antibacterial peptide was mixed with a portion of the deionized water and stirred at high speed for 40 minutes; then, the remaining water and defoamer were added and stirred at low speed for 20 minutes; finally, the water-based adhesive was added and stirred at medium speed for 30 minutes, followed by standing for 3 hours to defoam. The electrostatic spraying parameters were optimized to: spraying voltage 65kV, spraying distance 18cm, spray gun movement speed 0.7m / s, slurry delivery pressure 0.28MPa, and spraying volume precisely controlled at 8.5±0.15g / m³. 2 The curing process uses a segmented heating process: 40℃ for 5 minutes, 55℃ for 8 minutes, and 50℃ for 2 minutes.

[0046] Step 4: Enhanced and optimized environmental post-treatment The low-temperature plasma activation parameters were adjusted to: processing power 85W, processing time 35 seconds, gas flow rate 28L / min, electrode spacing 1.8mm, and conveyor belt speed 0.4m / min. The fluorine-free hydrophobic finishing solution formulation was optimized to: 35% palm wax hydrophobic agent, 2% crosslinking agent, 1.2% JFC penetrant, and 61.8% deionized water. The padding process parameters were: first dip at 35℃ for 40 seconds, with a first padding allowance of 78%; second dip at 35℃ for 25 seconds, with a second padding allowance of 72%. Drying employed a gradient temperature increase: pre-drying at 50℃ for 3 minutes, main drying at 65℃ for 5 minutes, and setting at 55℃ for 2 minutes, with a hot air velocity of 1.8m / s and a dehumidification air volume of 900m³ / min. 3 / h. Example 3:

[0047] Raw material and process configuration: The fiber ratio is adjusted to 65% polyester fiber and 35% bamboo charcoal fiber, the spinning temperature is 245-255℃, the spinning speed is 280r / min, and the weaving density is 32 threads / cm×32 threads / cm.

[0048] Specific process parameters: In step 2, the hot melt adhesive coating amount is 4.5 g / m². 2 Composite temperature 118℃, laser power 350W, hot pressing pressure 0.9MPa, microbump density 110 / cm² 2 (Spacing 0.95mm). Step 3 uses a high antibacterial formulation: antimicrobial peptide to adhesive ratio 1:2.5, spraying amount 9.0g / m². 2 Spraying voltage 70kV, curing temperature 55℃ for 18 minutes. Step 4: Strengthening treatment: plasma power 90W for 40 seconds, electrode spacing 1.5mm; hydrophobic finishing with hydrophobic agent concentration 40%, roll-off rate 68%, drying at 70℃ for 8 minutes.

[0049] The finished products obtained from the three embodiments were tested, and the results are shown in the table below:

[0050] In summary, the automotive carpet prepared by this invention exhibits excellent antibacterial and antifungal properties, with an inhibition rate of ≥98% against mold, an antibacterial rate of ≥90% against Escherichia coli and Staphylococcus aureus, a water contact angle of ≥120°, and a VOC emission level of <5mg / m³. 3 It retains its good function even after multiple washes, meeting the environmental protection requirements for automotive interiors.

[0051] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A process for the anti-bacterial and anti-mildew cleaning treatment of car carpets, characterized in that, The method comprises the following steps in sequence: Step 1: composite base material spinning weaving, mixing polyester fibers and bamboo charcoal fibers at a mass ratio of 7:3, and using a spinning process to prepare blended fibers, wherein the spinning temperature is 230-250 DEG C, and the spinning rotation speed is 300 r / min; subsequently, the blended fibers are processed into a composite base material layer for automobile carpet through a weaving process; Step 2: three-dimensional functional layer construction, using a polytetrafluoroethylene microporous membrane with a pore size of 0.1-0.2 mu m as a bottom waterproof membrane, and compounding a 1 mm-thick sodium polyacrylate moisture absorption net layer on the surface of the waterproof membrane to form a waterproof membrane-moisture absorption layer composite structure, wherein the water absorption ratio of the sodium polyacrylate moisture absorption net layer is not less than 300 times of its own weight; then, a honeycomb-shaped groove is processed on the side of the sodium polyacrylate moisture absorption net layer away from the waterproof membrane by using a laser engraving process, and the groove is formed into a honeycomb-shaped micro-protrusion with a diameter of 0.5 mm, a height of 0.3 mm and a pitch of 1 mm by a hot-pressing forming process, thereby obtaining a three-dimensional functional layer; Step 3: plant source antibacterial coating coating, plant source antibacterial peptide extracted from tea tree is mixed with water-based environment-friendly adhesive according to mass ratio 1:3 to prepare antibacterial coating slurry; the antibacterial coating slurry is coated on the microconvex point surface of the three-dimensional functional layer obtained in step 2 by using electrostatic spraying process, and the spraying amount is controlled to be 8 g / m 2 ; Subsequently, low-temperature curing is performed at 50 DEG C for 15 minutes to form an antibacterial coating layer; Step 4: environmental post-treatment strengthening, the composite structure obtained in step 3 is sequentially subjected to the following treatments: Low-temperature plasma activation: using air as the treatment gas, a low-temperature plasma device with a power of 80 W is used to activate the surface of the composite structure, and the treatment time is 30 seconds; Fluorine-free hydrophobic finishing: a plant-derived hydrophobic agent extracted from palm wax is attached to the surface layer of the composite structure by using a padding process, and then dried at 60 DEG C for 10 minutes to obtain a finished automobile carpet; The water contact angle of the surface layer of the finished automobile carpet is not less than 120 DEG.

2. The anti-bacterial and anti-mildew cleaning treatment process for automobile carpet according to claim 1, characterized in that, In step 1, the weaving process uses plain weaving, and the weaving density is 28 roots / cm x 28 roots / cm.

3. The anti-bacterial and anti-mildew cleaning treatment process for automobile carpet according to claim 1, characterized in that, In Step 2, the composite of the sodium polyacrylate hygroscopic web layer and the polytetrafluoroethylene microporous membrane is made by using a hot melt adhesive composite process, the coating amount of the hot melt adhesive is 5 g / m 2 , and the composite temperature is 120°C.

4. The anti-bacterial and anti-mildew cleaning treatment process for automobile carpet according to claim 1, characterized in that, In step 3, the spraying voltage of the electrostatic spraying process is 60 kV, and the spraying distance is 20 cm.

5. The anti-bacterial and anti-mildew cleaning treatment process for automobile carpet according to claim 1, characterized in that, After the low-temperature plasma activation treatment in step 4, the number of hydroxyl and carboxyl active groups on the surface layer of the three-dimensional functional layer is increased by not less than 20% compared with before the activation.

6. The anti-bacterial and anti-mildew cleaning treatment process for automobile carpet according to claim 1, characterized in that, In the fluorine-free hydrophobic finishing in step 4, the padding process uses double padding and double rolling, and the rolling rate is controlled to be 70%.

7. The anti-bacterial and anti-mildew cleaning treatment process for automobile carpet according to claim 1, characterized in that, After the finished automobile carpet is washed for 5 times, the residual rate of the plant-derived antibacterial peptide in the antibacterial coating layer is not less than 65%, and the antibacterial rate of the finished automobile carpet after washing is not less than 80% for common bacteria; after being washed for 20 times, the inhibition rate of the finished automobile carpet for mold is not less than 85%, and the antibacterial rate of the finished automobile carpet for escherichia coli and staphylococcus aureus is not less than 80%.

8. The anti-bacterial and anti-mildew cleaning treatment process of automobile carpet according to claim 1, characterized in that, The finished automotive carpet has a VOC emission of less than 5 mg / m 3 ; In addition, the sodium polyacrylate moisture absorption net layer in step 2 can control the humidity inside the finished carpet to be below 50% during use.

9. The anti-bacterial and anti-mildew cleaning treatment process of automobile carpet according to claim 1, characterized in that, In step 3, the mass ratio of the plant-derived antibacterial peptide to the water-based environment-friendly adhesive can be adjusted in the range of 1:2.5 to 1:3.5, and the spraying amount of the antibacterial coating slurry is adjusted to 7-9 g / m 2 .

10. The anti-bacterial and anti-mildew cleaning treatment process for automobile carpet according to claim 1, characterized in that, The drying process in step 4 uses hot air circulation drying, and the hot air speed is 1.5 m / s.

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