A cleaning fabric for a cylinder with an adaptive doctor bar structure and a method of making

Abstract

The application discloses a cleaning velvet for a roller with an adaptive scraping strip structure and a preparation method, and relates to the technical field of cleaning velvets.The application forms a gradient structure with decreasing diameters by setting resin in the 1 / 3 part of the head end of a fiber bundle and solidifying the resin, the root part of the fiber bundle remains in a flexible state without solidification, and the solidified root part of the fiber bundle can freely move and has compressibility; the cleaning velvet after the modification treatment simultaneously considers the ability of scraping high-viscosity stains and the water absorption performance; and the gradient structure reduces the stress concentration problem between the hard part and the flexible base, and helps to improve the service life of the cleaning velvet product.

Description

Technical Field

[0001] This invention relates to the field of cleaning fabric technology, and more specifically to a cleaning fleece fabric for rollers with an adaptive scraper structure and its preparation method. Background Technology

[0002] With the development of the smart home industry, roller-type robotic vacuum cleaners have become common household cleaning devices due to their high cleaning efficiency and high degree of automation. The performance of their core cleaning component—the roller mop—affects the cleaning effect and user experience. Currently, most roller mops are made of microfiber fleece fabric, utilizing the high specific surface area and capillary action of microfiber to absorb water and dust. However, when faced with highly sticky stains such as kitchen grease and sticky stains on the dining table, simple adsorption is insufficient to achieve good cleaning results, and scraping force is needed to assist in removal.

[0003] To improve the scratching effect, existing technologies often add hard scraping strips to the surface of flexible fleece fabrics. By using hard scraping strips to increase pressure, the ability to scratch and remove stains is enhanced. However, this method has the following technical drawbacks: First, it is difficult to combine hard scrapers with flexible fleece fabrics. When using bonding, sewing or other methods to connect them, problems such as detachment and delamination can easily occur, affecting the service life. Furthermore, during the scraping process, hard scrapers may cause the fleece fibers of the fleece fabric to break and lie flat. In severe cases, it may cause damage or cuts to the fabric, ultimately affecting the cleaning effect. Secondly, most existing rigid cleaning squeegees are one-piece fixed structures, which are rigid and non-compressible. They cannot flexibly deal with uneven surfaces, resulting in over-cleaning in some areas and under-cleaning in others. They also accelerate edge wear, ultimately leading to a decrease in cleaning ability. In addition, this characteristic of rigid cleaning squeegees also requires the roller to have greater driving force to meet the motor's operating requirements when rotating. This not only increases energy consumption but also generates more noise, affecting the user experience. Third, existing roller mops remove dirt from the surface of the mop by physical contact and squeezing between the mop and the fixed scraper. However, during this cleaning process, the scraper must be kept basically parallel to the roller axis. Otherwise, a wedging effect may occur, causing jamming or uneven force on the mop, which may cause it to deviate and prevent the roller from operating normally. In severe cases, it may damage the equipment.

[0004] Existing microfiber cleaning fabrics are widely used in the cleaning industry due to their microfiber structure and good durability. However, research on them has focused primarily on optimizing water absorption, with insufficient improvement in the scraping performance of highly viscous stains. This makes it difficult to meet the needs of removing highly viscous stains in complex environments. Furthermore, conventional photopolymerization technology, due to limitations in optics, materials, processes, and equipment, cannot accurately achieve localized gradient curing. It cannot simultaneously meet the requirements of both rigid scraping and flexible adaptation of roller mops, thus making it difficult to effectively resolve the contradiction between the cleaning performance of existing roller mops and equipment compatibility.

[0005] To address the aforementioned technical problems, this invention aims to develop a novel cleaning fabric that can balance flexible absorbency and rigid scraping force, is compatible with roller-type sweeping robots, and reduces the risk of jamming and noise. At the same time, it provides a simple, highly controllable preparation method suitable for industrial production, solving the problem of combining rigid structures with flexible fleece fabrics. Summary of the Invention

[0006] This invention provides A cleaning fleece fabric for rollers with an adaptive scraper structure and its preparation method are disclosed. The method involves resin curing some fiber bundles in the microfiber fleece fabric, causing them to gather from loose fibers to form a temporary "scraper structure" when squeezed by the ground during operation, thereby improving the scraping effect of the fleece fabric on highly viscous oil stains.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: Step S1: Pre-treat the microfiber fleece fabric substrate; Step S2: Prepare a photocurable resin based on acrylate photosensitive resin; Step S3: Divide the microfiber fleece fabric substrate obtained after the pretreatment in step S1 into modified and unmodified areas, and shear the fibers in the modified areas. Step S4: Add the prepared light-curing resin to the top of the fiber bundle in the modified area after shearing and cure simultaneously; Step S5: Post-process the cured fleece fabric to obtain a clean fleece fabric.

[0008] The pretreatment in step S1 includes degreasing, cleaning and drying. Pretreatment ensures the uniformity of the microfiber fleece fabric substrate and the firmness of resin adhesion during subsequent processing, reduces the impact of impurities and moisture on the curing effect, and thus improves the stability of the microfiber fleece fabric substrate. Furthermore, degreasing is performed using a neutral degreasing agent at 40-50 ℃ for 15-20 min to remove oil stains and residual auxiliaries from the fabric surface during the production process; Furthermore, the cleaning process includes rinsing with deionized water 3-4 times to remove any neutral degreasing agent residue; Furthermore, the drying process includes drying at 80-100 ℃ for 30-40 min, and controlling the moisture content of the fabric after drying to ≤5%, thereby obtaining a pretreated substrate; Furthermore, the microfiber fleece fabric base is polyester island-type microfiber with a fiber fineness of 1-3 dtex and a fabric density of 500-600 g / m². 2 ; In step S2, an acrylic photosensitive resin is prepared as the main material to cure the light. Acrylic photosensitive resin has the characteristics of fast curing speed, strong adhesion and good flexibility, which is suitable for fiber modification requirements. Furthermore, by sequentially adding a photoinitiator and a dispersant to an acrylate photosensitive resin, resin polymerization is initiated under ultraviolet irradiation; Furthermore, based on the mass of the acrylate photosensitive resin, the mass of the photoinitiator is 1.5% to 3% of the mass of the acrylate photosensitive resin, and the mass of the dispersant is 1% to 3% of the mass of the acrylate photosensitive resin; Furthermore, the photoinitiator is preferably of type PI0 or PI5; Furthermore, the dispersant is polyvinylpyrrolidone with a mass fraction of 0.1%-0.3%. Adding the dispersant helps to uniformly disperse the photoinitiator and avoids uneven local curing. Furthermore, after the resin is polymerized, it is stirred evenly and the viscosity of the system is controlled at 500-1500 mPa·s to adapt to the subsequent syringe dripping process, so that the resin can evenly cover the fiber head and reduce the flow to the root. In step S3, a flexible shaft shearing machine is used to shear the areas in the pretreated substrate obtained in step S1 that require modification. Furthermore, by shearing the fibers, the height of the fibers in the modified area is ensured to be consistent with the height of the fibers in the unmodified area after the resin is added. Furthermore, the shearing process involves trimming the fibers downwards by 1-2 mm along the vertical direction of the hair. Furthermore, the flexible shaft shearing machine has a blade rotation speed of 2400 rpm, a feed speed of 100 mm / min, and is tilted 10~30° relative to the vertical direction; Furthermore, the area ratio of the modified region to the unmodified region in the pretreated substrate is 1:9; Furthermore, the modified area is the area on the pre-treated substrate that extends through the transverse fabric; Furthermore, for areas requiring modification, a fixed trimming of 1 mm and a trimming width of 3 mm are applied, followed by the addition of light-cured resin for modification; areas not requiring modification are left untrimmed. Furthermore, within the modified area, along the transverse direction, 2-4 bundles of fibers are selected evenly in the center as modified fiber bundles within the width of the trimming. In step S4, the light-curing resin prepared in step S2 is dripped onto the fiber tip that has been sheared in the modified area using a micro-syringe, and then cured simultaneously. Furthermore, by fixing the pretreated substrate on a semi-cylindrical arc platform, with the modified area located at the apex of the arc, it is convenient to position and drip resin. The position of the micro-injector is adjusted so that the distance between the needle of the micro-injector and the fiber tip is kept within the range of 1-2 mm. Furthermore, resin was dripped onto the top third of the modified fiber bundle using a microsyringe, with the dripping volume controlled at 0.01-0.03 mL / bundle and the dripping rate at 5-10 μL / s; Furthermore, the needle diameter of the microsyringe is 0.1-0.2 mm. Furthermore, during the process of adding the light-curing resin, a curing process is simultaneously carried out using a curing device; Furthermore, the curing process involves using an LED ultraviolet curing device with an ultraviolet light source of 365 nm wavelength for curing. Furthermore, the curing light intensity is 100-300 mW / cm². 2 The irradiation time is 15-60 seconds; Furthermore, during the irradiation process, the curing device is located directly above the modified area, 5-8 cm away from the surface of the microfiber fleece fabric; Furthermore, the curing equipment uses continuous irradiation, which is beneficial for the uniform curing of the modified fiber bundles; Furthermore, the photocurable resin dripped onto the fiber tip slowly flows downwards and penetrates under the action of gravity, while the resin at the fiber tip cures rapidly under the action of the curing equipment, and the photocurable resin flowing downwards cures slowly, forming a gradient structure in which the diameter gradually decreases from the fiber tip to the root. Furthermore, the diameter of the modified fiber bundle head is 1.5-2.5 times that of the original fiber bundle diameter to generate a scraping force; Furthermore, the roots of the modified fiber bundles remain in an uncured, flexible state, consistent with the flexibility of the base fibers, which facilitates the free movement of the modified fiber bundles. The post-treatment in step S5 includes cooling, removal of residual resin and scum, and smoothing. The post-treatment improves the surface smoothness of the product and reduces the impact of residual resin on the absorbency and softness of the fabric. Furthermore, cooling is achieved by blowing air at a normal temperature of 25-30 ℃ for 10-15 minutes to stabilize the cured resin and allow it to solidify. Furthermore, after cooling, the fabric surface is swept with a low-pressure airflow of 0.1-0.2 MPa to remove uncured residual resin and surface scum; Furthermore, by performing a smoothing process, a clean fleece fabric is finally obtained. In the modified area, the fiber diameter of the fiber in one-third of the entire fiber bundle exhibits a structural distribution that decreases from the tip to the root.

[0009] Another object of the present invention is to provide a clean fleece fabric obtained by the above preparation method, the clean fleece fabric including several modified regions, the fiber bundles in the modified regions being trimmed by 1 mm, wherein several fiber bundles are set as modified fiber bundles, and the tips of the modified fiber bundles are formed by dripping and curing resin to form a gradient structure in which the diameter of the fiber bundles gradually decreases from the tip to the root. The modified fiber bundles exhibit an inclined distribution with an angle of 10-30°. This inclined structure facilitates the contact between the gradient structures at the tips of the modified fiber bundles and the formation of an adaptive scraping structure. In its natural state, the modified fiber bundles are in a soft state. When subjected to external pressure, the gradient structures at the tips of the modified fiber bundles form a scraping structure, thereby achieving the scraping of highly viscous stains such as grease.

[0010] The present invention has the following beneficial effects: This invention provides a cleaning fleece fabric for rollers with an adaptive scraping structure and a method for preparing it. The method involves regionally modifying the cleaning fleece fabric by dripping resin onto the tips of the modified fiber bundles to form a gradient structure, while the remaining fibers retain their soft properties. This allows the modified cleaning fleece fabric to simultaneously achieve the ability to scrape off highly viscous stains and absorb water. Furthermore, this gradient structure reduces stress concentration between the hard parts and the flexible substrate, which helps to extend the service life of the cleaning fleece fabric product. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the gradient structure of the adaptive scraper in a cleaning fleece fabric for rollers with an adaptive scraper structure provided in Embodiment 2 of the present invention; Figure 2 This is a schematic diagram of the free state of fibers in a cleaning fleece fabric for a roller with an adaptive scraping structure provided in Embodiment 2 of the present invention; Figure 3 This is a schematic diagram of a cleaning fleece fabric with an adaptive scraper structure for a roller, which forms a temporary scraper by tilting its fibers during operation, as provided in Embodiment 2 of the present invention. Reference numerals: 1-Unmodified fiber bundle, 2-Resin, 3-Modified fiber bundle, 4-Flexible substrate, 5-Scraping structure. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] Example 1 This embodiment provides a method for preparing a cleaning fleece fabric for a roller with an adaptive scraper structure, the method comprising: Step S1: Pre-treat the microfiber fleece fabric substrate; Polyester island-type microfiber woven fleece fabric was selected as the base, with a fiber fineness of 1 dtex and a weaving density of 550 g / m². 2 The pile height was 6 mm; the substrate was degreased with a neutral degreasing agent at 45 ℃ for 18 min, washed three times with deionized water, and dried at 85 ℃ for 35 min. The moisture content after drying was 3%, and the pretreated substrate was obtained.

[0014] Step S2: Prepare a photocurable resin based on acrylate photosensitive resin; Weigh 20g of 55% acrylate photosensitive resin as the main material, then add 0.6g of 0.8% PIO photoinitiator and 0.6g of 0.2% polyvinylpyrrolidone dispersant in sequence, stir for 20 min until uniformly mixed, and control the viscosity of the system to 1000 mPa·s; after stirring, transfer the resin into a syringe and avoid light exposure.

[0015] Step S3: Perform shearing on the microfiber fleece fabric substrate obtained after the pretreatment in step S1. A flexible shaft shearing machine was used at a speed of 2400 rpm. The resin-modified area was selected and advanced horizontally at 100 mm / min. The trimming amount was 1 mm, the trimming area was 3 mm wide, and the area was tilted at 10° relative to the vertical direction.

[0016] The area ratio of the modified region to the unmodified region in the pretreated substrate is 1:9; the modified region is the area selected in the center of the pretreated substrate that runs through the transverse fabric. For areas requiring modification, trim 1 mm to a width of 3 mm, then apply light-cured resin for modification; areas not requiring modification do not require trimming. Within the modified area, along the transverse direction, select 2-4 bundles of fibers evenly in the center as modified fiber bundles within the width of the trimming. Step S4: Add the prepared light-curing resin to the top of the fiber bundle in the modified area after shearing and cure simultaneously; By fixing the pretreated substrate on a semi-cylindrical arc platform, the modified area is located at the apex of the arc, which facilitates the positioning and dripping of resin. A micro-injector with a needle diameter of 0.15 mm is used, and the position of the micro-injector is adjusted to ensure that the distance between the needle and the fiber tip is 1.5 mm. In the modified area, 3 bundles are selected from each row of ultrafine fiber bundles as modified fiber bundles, and the resin dripping amount is 0.02 mL / bundle, with a dripping rate of 8 μL / s, so that the resin only covers the top third of the fiber bundle. After adding the resin, it was quickly cured using an LED ultraviolet light curing device with a wavelength of 365 nm and a light intensity of 200 mW / cm². 2 The device is 6 cm away from the fabric and is continuously irradiated for 15 seconds to complete curing, forming a resin strip structure with a width of 0.4 mm and an inclination angle of 10°.

[0017] Step S5: Post-process the cured fleece fabric to obtain a clean fleece fabric. The surface was cooled by blowing air at 28℃ for 12 minutes, and then the surface was swept by low-pressure air at 0.15 MPa to improve flatness, resulting in a clean fleece fabric with the modified fiber bundle head diameter being 2.2 times the original diameter.

[0018] Example 2 This embodiment provides a cleaning fleece fabric with an adaptive scraping strip structure. This cleaning fleece fabric is prepared based on the method described in Embodiment 1 above. The structure of the cleaning fleece fabric is as follows: Figure 1 As shown, it includes an unmodified fiber bundle 1 and a modified fiber bundle 3 on a flexible substrate 4, wherein the modified fiber bundle 3 is provided with resin at its tip to form a gradient structure with a decreasing diameter from the tip to the root. In its natural state, this clean fleece fabric is like Figure 2 As shown, both modified and unmodified fiber bundles retain their soft properties; the cleaning fleece fabric during operation, such as... Figure 3 As shown, the gradient structures at the tips of the modified fiber bundles come into contact with each other to form a scraper structure, which enables the scraping of highly viscous stains such as grease.

[0019] To verify the effectiveness of the cleaning fabric provided in this embodiment, a field cleaning test was conducted: First, solid hot pot tallow was selected as the stain and heated in a water bath at 80 ℃ for 1 hour to fully melt it. Then, 1g of solid hot pot tallow was accurately weighed and evenly applied to a 10cm×10cm square area on the surface of the simulated floor tile. Finally, the tile with the stain was placed in a dry, dust-free environment at room temperature and left to stand for 2 hours, avoiding contact during this period.

[0020] The test used a robotic vacuum cleaner. The robot was fully charged and initialized, and the roller brush and dustbin were cleaned. A flat, debris-free test site was set up (temperature 23±5℃, humidity 40%-60%). The solidified oil sample was placed in the center of the robot's path. The robot was set to standard mode and cleaned repeatedly 5 times, which was considered one complete test. After the robot completed one complete test, the roller was replaced and the test was repeated 3 times, keeping the test conditions consistent. The test rollers included ordinary microfiber fabric rollers and the cleaning velvet fabric roller with adaptive scraper structure provided by this invention. The residual oil mass was recorded after each test.

[0021] Weigh the oil samples before and after the test, and record the masses as m0 and m1, respectively. Calculate the oil removal rate using the formula: Oil removal rate (%) = × 100% Where m0 is the original weight of the oil stain, and m1 is the residual weight of the oil stain after the test; The initial mass of oil stains in each of the three tests was 1g, and the average value of the three parallel test results was taken as the final removal rate.

[0022] The final test results are shown in Table 1: Table 1. Results of oil removal rate test As shown in Table 1, the oil removal rate of ordinary microfiber fabrics is only 9.0%, while the oil removal rate of the clean fleece fabric provided by the present invention is 33%, which is an improvement.

[0023] To further verify the water absorption performance of the fleece fabric provided by the present invention, this embodiment conducted a fabric moisture absorption performance test: First, cut ordinary microfiber fabric and the clean fleece fabric provided by this invention into 10×10 cm pieces and dry them to constant weight; weigh the original mass of the dried fabric sample and record it as m2; completely immerse the fabric sample in distilled water and let it stand for 30 minutes to ensure that the sample fully absorbs water, avoiding squeezing the sample during this period; remove the water-absorbed sample, hang it to drain water until no water droplets drip naturally, and immediately weigh its mass and record it as m3; perform three parallel tests, keeping the test environment (temperature 23±5℃, humidity 40%-60%) consistent; finally, calculate the fabric water absorption rate according to the formula: Water absorption rate (%) = × 100% Where m2 is the mass of the fabric when it is dried, and m3 is the mass of the fabric after it absorbs water; The average of the results of three parallel tests was taken as the final water absorption rate.

[0024] The test results are shown in Table 2: Table 2 Water Absorption Test Results As shown in Table 2, the water absorption rate of ordinary microfiber fabric is 574%, while the water absorption rate of the cleaning fleece fabric provided by the present invention is 507%. Therefore, it can be seen that the adaptive scraper structure provided by the present invention can improve the removal efficiency of highly viscous oil stains with minimal impact on the water absorption characteristics of the fabric.

[0025] The above provides a detailed description of the adaptive scraper structure for cleaning velour fabric in rollers proposed in this invention, and elucidates the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. At the same time, for those skilled in the art, there will be changes in specific implementation methods and application scope based on the ideas of this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A method for preparing a cleaning fleece fabric for a roller with an adaptive scraper structure, characterized in that, The method includes: Step S1: Pre-treat the microfiber fleece fabric substrate; Step S2: Prepare a photocurable resin based on acrylate photosensitive resin; Step S3: Divide the microfiber fleece fabric substrate into modified and unmodified areas, and shear the fibers in the modified areas. Step S4: Add the prepared light-curing resin to the tip of the sheared fiber bundle in the modified area and simultaneously perform curing treatment; Step S5: Post-process the cured fleece fabric to obtain a clean fleece fabric.

2. The method according to claim 1; characterized in that, Step S4 includes fixing the fleece fabric to the clamp, and using a micro-syringe to drop light-cured resin onto the fiber bundle tip of the modified area. The distance between the needle of the micro-syringe and the fiber tip of the fleece fabric is maintained at 1-2 mm. The needle diameter of the micro-syringe is 0.1-0.2 mm, the dropping speed is 5-10 μL / s, and the dropping volume is controlled at 0.01-0.03 mL / bundle.

3. The method according to claim 2, characterized in that, In step S4, the fleece fabric to which the photocurable resin has been applied is cured using an LED ultraviolet curing device. The LED ultraviolet curing device uses an ultraviolet light source with a wavelength of 365 nm for curing, and the light intensity during curing is 100-300 mW / cm². 2 The irradiation time is 15-60 s, and the distance between the LED ultraviolet curing device and the surface of the fleece fabric is kept at 5-8 cm during the irradiation process.

4. The method according to claim 3, characterized in that, In step S3, a flexible shaft shearing machine is used to shear the modified area of ​​the microfiber fleece fabric substrate. The area ratio of the modified area to the unmodified area is 1:

9. In each row of the modified area, 2-4 bundles of fibers are evenly selected as modified fiber bundles. The flexible shaft shearing machine has a blade rotation speed of 2400 rpm, a feed speed of 100 mm / min, and is tilted 10~30° relative to the vertical direction; In the modified area, the fixed trimming amount is 1 mm and the trimming width is 3 mm, while the unmodified area is left untreated.

5. The method according to claim 4, characterized in that, The preparation process of the photocurable resin in step S2 includes: using acrylate photosensitive resin as the main material, adding photoinitiator and dispersant to the main material in sequence to initiate resin polymerization, stirring evenly after polymerization and controlling the system viscosity to 500-1500 mPa·s. The photoinitiator is of type PI0 or PI5, and the mass of the photoinitiator is 1.5% to 3% of the mass of the acrylate photosensitive resin; the dispersant is polyvinylpyrrolidone with a mass fraction of 0.1% to 0.3%, and the mass of the polyvinylpyrrolidone is 1% to 3% of the mass of the acrylate photosensitive resin.

6. The method according to claim 5, characterized in that, The pretreatment in step S1 includes degreasing, washing, and drying; The degreasing process involves using a neutral degreasing agent at 40-50°C for 15-20 minutes to remove oil stains and residual additives from the fabric surface. The cleaning process includes rinsing with deionized water 3-4 times to remove neutral degreasing agent residue; The drying process includes drying at 80-100℃ for 30-40 minutes, and controlling the moisture content of the fabric after drying to ≤5%, thereby obtaining a pretreated substrate; The microfiber fleece fabric base is polyester island-type microfiber with a fiber fineness of 1-3 dtex and a fabric density of 500-600 g / m³. 2 .

7. The method according to claim 6, characterized in that, The post-processing in step S5 includes cooling the fabric surface with a normal temperature airflow of 25-30 ℃ for 10-15 minutes, followed by blowing the fabric surface with a low pressure airflow of 0.1-0.2 MPa, and finally performing a smoothing process.

8. A clean fleece fabric prepared according to any one of claims 1-7, characterized in that, The fleece fabric includes several modified regions, and several fiber bundles in the modified regions are configured as modified fiber bundles. The roots of the modified fiber bundles remain flexible, and the top third of the modified fiber bundles exhibits a structure with decreasing diameter from the top to the root.

9. The cleaning fleece fabric according to claim 8, characterized in that, The diameter of the tip of the modified fiber bundle in the clean fleece fabric is 1.5-2.5 times the diameter of the root. In its natural state, the cleaning fleece fabric is soft; when subjected to pressure during operation, the resin at the tips of the modified fiber bundles comes into contact with each other to form a temporary scraping structure.

10. An application of the method according to any one of claims 1-7 and / or the cleaning fabric according to claim 8 or 9 in the drum of a roller-type sweeping robot.

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