A method for preparing a composite fabric based on a transfer coating

Abstract

The present application relates to the technical field of textile, especially to a preparation method of composite fabric based on transfer coating, comprising the following steps: S1, spreading the to-be-composited fabric for cleaning treatment; S2, preparing coating paste; S3, laminating the to-be-composited fabric and performing adhesion test; S4, pressing the to-be-composited fabric and performing adhesion test; S5, peeling off the transfer paper to form the composite fabric. The present application detects the real-time coating thickness of the to-be-composited fabric of the output rolling device by the control device to determine the uniformity of the coating, moves the to-be-composited fabric to the upper part of the coating detection device to perform adhesion test, selectively adjusts the control parameters of the coating device if the to-be-composited fabric separates from the fabric, to meet the operation requirements of batch production of composite fabric, and guarantees the drape and adhesion effect of the composite fabric by pressing the to-be-composited fabric.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textiles, and in particular to a preparation method of composite fabric based on transfer coating. BACKGROUND

[0002] Transfer coating finishing is to coat the coating agent on the transfer paper, then superimpose the transfer paper and the base cloth, roll and dry, so that the coating agent is transferred to the base cloth, and after drying and cooling, the transfer paper and the coated fabric are separated and rolled respectively. Compared with direct coating finishing, transfer coating finishing is suitable for a wider range of fabrics, and because no tension is applied to the fabric during the construction process, the penetration of the coating material can be significantly reduced, so that the fabric is not hard and the appearance of the fabric is improved. Today, the existing fabric coating equipment can perform continuous coating process, but there is a lack of a high-precision automatic coating equipment that can accurately control the concentration and dosage of the coating agent and adjust the parameters of each control system to ensure the softness and drapeability of the fabric.

[0003] Chinese patent publication No. CN108166266A discloses a fabric coating process, which provides a series of fabric preparation steps. It can be seen that the existing composite fabric preparation technology lacks real-time monitoring of the lamination, i.e. through lamination test to determine the adhesion effect of the coating agent and the fabric, and adjust the pressure or coating amount of each control system to meet the work requirements of batch production of composite fabric. SUMMARY

[0004] Therefore, the present application provides a preparation method of composite fabric based on transfer coating to overcome the problem that the transfer coating finishing in the prior art cannot guarantee the uniformity and adhesion of the coating.

[0005] To achieve the above-mentioned purpose, the present application provides a preparation method of composite fabric based on transfer coating, comprising,

[0006] Step S1: unwinding device expands the to-be-combined fabric, removes the surface of the to-be-combined fabric through the hair removal device, and sprays the antistatic spray on the to-be-combined fabric and dries it through the spraying device;

[0007] Step S2: add the coating material to the solvent at a preset initial ratio to form a coating paste, and disperse the coating paste through the stirring device;

[0008] Step S3, the coating paste is coated on the transfer paper in a preset coating amount, the transfer paper is placed on the fabric to be compounded at a preset transfer temperature by the transfer device to form the fabric to be finished, the fabric to be finished is conveyed by the unwinding device, and the fabric to be finished is laminated by the rolling device under a preset transfer pressure; the real-time coating thickness of the fabric to be finished output from the rolling device is detected, and when it is determined that the real-time coating thickness is within the standard coating thickness range, the fabric to be finished is moved to the upper part of the coating detection device for adhesion test to determine whether the fabric to be finished after laminating treatment is qualified;

[0009] Step S4, when it is determined that the fabric to be finished after laminating treatment is qualified, the fabric to be finished is subjected to pressing treatment to form a transfer coating composite fabric;

[0010] Step S5, after the transfer coating composite fabric is dried and cooled, the transfer paper is peeled off into a roll, and the transfer coating composite fabric of the peeled transfer paper is wound by the winding device to form a composite fabric.

[0011] Further, in the step S3, when the coating paste is coated on the transfer paper in a preset coating amount, the transfer paper is heated by a first heat source, the control device acquires the real-time transfer temperature detected by the temperature sensor arranged on the transfer device, and when it is determined that the real-time transfer temperature reaches the preset transfer temperature, the transfer device places the transfer paper on the fabric to be compounded to form the fabric to be finished.

[0012] Further, the control device is provided with a standard thickness deviation value, the unwinding device inputs the fabric to be finished into the rolling device for laminating treatment, and when the rolling device is output, the control device acquires the coating thickness image of the fabric to be finished by the laser thickness gauge, acquires the maximum thickness deviation value of the fabric to be finished, and judges the maximum thickness deviation value according to the standard thickness deviation value,

[0013] If the maximum thickness deviation value is less than or equal to the standard thickness deviation value, the control device will judge the real-time coating thickness according to the standard coating thickness range to adjust the working state of the coating finishing machine;

[0014] If the maximum thickness deviation value is greater than the standard thickness deviation value, the control device will acquire a plurality of simulated coating units corresponding to the maximum thickness deviation value, judge the positions of the simulated coating units in the coating thickness image to select the preset transfer pressure or the preset coating amount for adjustment.

[0015] Further, the control device is provided with a standard coating thickness range, and when the control device determines that the maximum thickness deviation value is less than or equal to the standard thickness deviation value, the control device acquires the real-time coating thickness of the fabric to be arranged, and determines the real-time coating thickness according to the standard coating thickness range,

[0016] If the real-time coating thickness is less than the standard coating thickness range, the control device adjusts the preset coating amount;

[0017] If the real-time coating thickness is within the standard coating thickness range, the control device determines the bonding state of the adhesive layer and the fabric to determine whether the fabric to be arranged after the lamination treatment is qualified;

[0018] If the real-time coating thickness Hs is greater than the standard coating thickness range, the control device acquires the initial solvent volume of the solvent, calculates the supplementary solvent volume, and adds the supplementary solvent volume of the solvent to the stirring device to adjust the preset initial ratio.

[0019] Further, when the control device determines that the maximum thickness deviation value is greater than the standard thickness deviation value, the control device acquires a plurality of simulated coating units corresponding to the maximum thickness deviation value, determines the position of the simulated coating unit in the coating thickness imaging,

[0020] If there is a simulated coating unit located in the internal area corresponding to the transfer paper, the control device adjusts the preset transfer pressure;

[0021] If there is no simulated coating unit located in the internal area corresponding to the transfer paper, the control device adjusts the preset coating amount.

[0022] Further, the control device is provided with a standard detection pressure, and when the control device determines that the real-time coating thickness is within the standard coating thickness range, the control device controls the unwinding device to move the fabric to be arranged to the upper part of the coating detection device for bonding test, and acquires the shape of the fabric to be arranged through the laser thickness gauge, and determines the bonding state of the adhesive layer and the fabric,

[0023] If the adhesive layer and the fabric in the fabric to be arranged are separated, the control device determines that the fabric to be arranged after the lamination treatment is unqualified, and will be subjected to on-site inspection;

[0024] If the adhesive layer and the fabric in the fabric to be arranged are not separated, the control device will perform compression treatment on the fabric to be arranged.

[0025] Further, when the control device determines that the state of the adhesive layer separating from the fabric does not exist in the fabric to be arranged, the unwinding device is controlled to move the fabric to be arranged to pass through the knurled metal roller, and the knurled metal roller is used to press the fabric to be arranged at a preset bonding pressure to form the transfer coating composite fabric.

[0026] Further, the coating detection device comprises an air compressor and a tubular connecting barrel, one end of the tubular connecting barrel is connected with the air compressor, and the other end is connected with the fabric to be arranged through a sealing ring. When the coating detection device performs the adhesion test, the control device can control the air compressor to blow air to the fabric to be arranged through the tubular connecting barrel.

[0027] Further, the coating arrangement machine comprises the coating detection device, the laser thickness gauge, the unwinding device, the winding device, the lint removal device, the spraying device, the stirring device, the transfer device, the first heat source, the rolling device, the knurled metal roller, and the control device. The coating detection device is used to test the adhesion of the fabric to be arranged. The laser thickness gauge is used to detect the coating thickness image of the fabric to be arranged and obtain the shape of the fabric to be arranged. The transfer device is used to contact one side of the coating paste coated on the transfer paper with the fabric to be arranged. The rolling device comprises a pair of rollers, which are used to laminate the fabric to be arranged. The knurled metal roller is used to press the qualified fabric to be arranged.

[0028] Further, the process of obtaining the maximum thickness deviation value of the fabric to be arranged by the control device is as follows:

[0029] The coating thickness image is divided into a plurality of simulated coating units by vertical lines, the average coating thickness in each simulated coating unit is calculated and recorded as a simulated coating thickness, the simulated coating thickness values are added and divided by the number of simulated coating units to obtain the real-time coating thickness of the fabric to be arranged, and the real-time coating thickness is subtracted from each simulated coating thickness to obtain a plurality of coating thickness difference values. The absolute value of each coating thickness difference value is obtained, and the maximum value of the absolute values is obtained as the maximum thickness deviation value.

[0030] wherein, ΔHm=max{|ΔHi|}, ΔHi=Hs-Hi, i=1, 2, …n, ΔHm represents the calculated maximum thickness deviation value, n is the number of simulated coating units divided by the vertical lines in the coating thickness image, ΔHi represents the coating thickness difference value corresponding to each simulated coating unit, Hi represents the simulated coating thickness of each simulated coating unit, and Hs represents the real-time coating thickness of the fabric to be arranged.

[0031] Compared with the prior art, the present application has the beneficial effects that: by arranging the unwinding device, the fabric can be unfolded and moved; by arranging the stirring device, the coating paste can be stirred uniformly, and the coating paste concentration can be adjusted by changing the ratio of coating material and solvent, so as to ensure that the coating amount is accurately coated on the fabric; the control device detects the real-time coating thickness of the fabric to be arranged output from the rolling device, so as to determine the uniformity of the coating; when the control device determines that the real-time coating thickness is within the standard coating thickness range, it indicates that the formed coating is uniform; then the fabric to be arranged is moved to the upper part of the coating detection device for adhesion test; if the fabric to be arranged has edge curling or the coating in the middle position is separated from the fabric, it is determined that the fabric to be arranged is unqualified; the control parameters of the coating device are selectively adjusted to meet the operation requirements of batch production of composite fabric; and the adhesion effect and drape of the composite fabric are ensured by pressing the fabric to be arranged.

[0032] Further, by arranging the standard thickness deviation value, the control device determines the maximum thickness deviation value according to the standard thickness deviation value, the maximum thickness deviation value represents the maximum thickness variation of the coating paste coated on the fabric in a unit area, if the maximum thickness deviation value is less than or equal to the standard thickness deviation value, it indicates that the maximum thickness variation of the coating paste coated on the fabric in a unit area is small, and the thickness variation is small as a whole, that is, the coating thickness variation is uniform, if the maximum thickness deviation value is greater than the standard thickness deviation value, it indicates that the maximum thickness variation of the coating paste coated on the fabric in a unit area is significantly increased, and the position with large thickness is determined to determine the reason for the increase of coating thickness.

[0033] Further, by arranging the standard coating thickness range, the control device determines the real-time coating thickness according to the standard coating thickness range, if the control device determines that the real-time coating thickness is less than the standard coating thickness range, it indicates that the coating paste coated on the fabric is thin, that is, the coating paste content is low, then the preset coating amount is increased, if the control device determines that the real-time coating thickness is within the standard coating thickness range, it indicates that the coating thickness meets the operation requirements of the composite fabric, then whether the coating and the fabric are bonded is judged, if the control device determines that the real-time coating thickness is greater than the standard coating thickness range, it indicates that the coating paste coated on the fabric is thick, that is, the coating paste content is high, then the preset initial ratio is adjusted, the coating paste is diluted, the volatile solvent content is increased, and the glue amount is reduced.

[0034] Further, the reason for the increase in coating thickness can be determined by the distribution state of the coating. The thickness of the coating between each interval point, i.e. the thickness of each simulated coating unit, is obtained by a laser thickness gauge, and it is determined whether the region with a large coating thickness difference is outside or inside the transfer paper profile. If the control device determines that there is a simulated coating unit located in the corresponding internal region of the transfer paper, it indicates that the coating is thicker inside the transfer paper profile. This is because the pressure applied to the coating is smaller, resulting in incomplete flattening of the coating, so the preset transfer pressure needs to be increased. If the control device determines that there is no simulated coating unit located in the corresponding internal region of the transfer paper, it indicates that the coating is thicker outside the transfer paper profile. This indicates that the coating thickness inside the transfer paper profile is within the standard value, while the coating is thicker outside the transfer paper profile. This is because the coating paste is excessive, resulting in an excessively large coating area, so the value of the preset coating amount needs to be reduced.

[0035] Further, the bonding state of the adhesive layer and the fabric is determined by performing a bonding test. If the control device determines that the adhesive layer and the fabric are separated in the fabric to be arranged, the solvent is easily volatile, which can cause bubbles or defects in the coating during the volatilization process, thereby affecting the bonding degree of the adhesive layer and the fabric. Therefore, after applying the third layer of polyurethane solution, the laminating treatment is performed, i.e. the unqualified fabric to be arranged is compounded with the coating paste again, to ensure sufficient contact time between the adhesive layer and the fabric. If the control device determines that the adhesive layer and the fabric are not separated in the fabric to be arranged, the laminating treatment is directly performed.

[0036] Further, the bonding state of the adhesive layer and the fabric is determined by performing a bonding test. If the control device determines that the adhesive layer and the fabric are separated in the fabric to be arranged, the solvent is easily volatile, which can cause bubbles or defects in the coating during the volatilization process, thereby affecting the bonding degree of the adhesive layer and the fabric. Therefore, after applying the third layer of polyurethane solution, the laminating treatment is performed, i.e. the unqualified fabric to be arranged is compounded with the coating paste again, to ensure sufficient contact time between the adhesive layer and the fabric. If the control device determines that the adhesive layer and the fabric are not separated in the fabric to be arranged, the laminating treatment is directly performed.

[0037] Further, the unqualified fabric to be processed after the laminating treatment is subjected to laminating treatment at a preset compounding temperature, i.e. the temperature condition is changed to perform the laminating treatment on the fabric to be processed. By reducing the hot pressing temperature, the viscosity of the coating paste is increased, and the adhesion effect is improved. The laminating treatment can also perform embossing treatment on the fabric to be processed, so that the composite fabric has a concave-convex pattern appearance. If the fabric to be processed after the laminating treatment is qualified, it indicates that the adhesion effect is good, and the laminating treatment is directly performed, i.e. embossing is performed.

[0038] Further, by the air compressor conveying airflow to the center of the composite fabric, when the airflow flows through the surface of the fabric, a pressure difference is generated, so that the fabric is subjected to an upward force, causing the coating and the fabric to expand upward, and because the weight of the coating and the fabric is different, if the coating and the fabric are not completely attached, when the airflow flows through the surface of the coating and the fabric, the coating and the fabric will expand upward at different amplitudes, if the coating and the fabric are completely attached, when the airflow flows through the surface of the coating and the fabric, the coating and the fabric will expand upward at the same amplitude, and the control device judges the separation state and separation degree of the coating and the fabric through the attachment test, so as to determine whether the fabric to be processed is qualified.

[0039] Further, by dividing the coating thickness image into a plurality of simulated coating units, i.e., simulating the segmentation of the coating thickness, calculating the average thickness of each segment as the simulated coating thickness of each simulated coating unit, and calculating the average value of each simulated coating thickness as the real-time coating thickness, the thickness difference is calculated by comparing the real-time coating thickness with the simulated coating thickness, and the maximum thickness difference is selected as the maximum thickness deviation value, so as to ensure accurate calculation. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 Flow chart of the composite fabric preparation method based on the transfer coating of the embodiment of the present application;

[0041] Figure 2 Structure diagram of the coating finishing machine of the embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the purpose and advantages of the present application clearer and more apparent, the present application will be further described below in conjunction with the embodiments; it should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0043] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not used to limit the protection scope of the present application.

[0044] It should be noted that in the description of the present application, the terms "up", "down", "left", "right", "in", "out" and the like indicate the direction or positional relationship terms based on the direction or positional relationship shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0045] Moreover, it needs to be explained that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] Please refer to Figure 1 With Figure 2 As shown in the figure, Figure 1 is a flow chart of the preparation method of the composite fabric based on the transfer coating of the embodiment of the present application, Figure 2 is a structural schematic diagram of the coating finishing machine, including unwinding device 1, winding device 2, laser thickness gauge 3, hair removal device (not shown in the figure), spraying device (not shown in the figure), transfer device 4, transfer paper 401, temperature sensor, coating detection device, air compressor 501, first connecting pipe 502, first connecting barrel 503, second connecting pipe 504, second connecting barrel 505, sealing ring 506, first heat source 6, rolling device 7, textured metal roller 8, fabric to be processed, second heat source 10, stirring device 11 and control device (not shown in the figure), wherein,

[0047] Step S1, the unwinding device 1 unfolds the composite fabric to be processed, the surface of the composite fabric to be processed is cleaned by the hair removal device, and the antistatic spray is sprayed on the composite fabric to be processed by the spraying device and is dried;

[0048] Step S2, the coating material is added to the solvent at a preset initial ratio to form a coating paste, and the coating paste is dispersed by the stirring device 11;

[0049] Step S3, the coating paste is coated on the transfer paper 401 at a preset coating amount, the transfer paper is placed on the composite fabric to be processed at a preset transfer temperature by the transfer device 4, the composite fabric to be processed is conveyed by the unwinding device 1, the composite fabric to be processed is laminated by the rolling device 7 at a preset transfer pressure, the real-time coating thickness of the composite fabric to be processed output from the rolling device 7 is detected, and when the real-time coating thickness is within the standard coating thickness range, the composite fabric to be processed is moved to the upper part of the coating detection device for adhesion test to determine whether the composite fabric to be processed after laminating is qualified;

[0050] Step S4, when determining that the to-be-processed fabric after the laminating treatment is qualified, the to-be-processed fabric is subjected to the pressing treatment, when determining that the to-be-processed fabric after the laminating treatment is unqualified, the laminating treatment is repeated once again, when determining that the to-be-processed fabric after the laminating treatment is unqualified again, the pressing treatment is performed at a preset composite temperature to form the transfer coating composite fabric;

[0051] Step S5, after the transfer coating composite fabric is dried and cooled, the transfer paper is peeled off into a roll, and the transfer coating composite fabric after the transfer paper is peeled off is wound by the winding device 2 to form the composite fabric.

[0052] The unwinding device is arranged to expand and move the fabric, the stirring device 11 is arranged to uniformly stir the coating paste, and the proportion of the coating material and the solvent is changed to adjust the concentration of the coating paste, so that the coating amount is accurately coated on the fabric, the real-time coating thickness of the to-be-processed fabric output by the rolling device 7 is detected by the control device to determine the uniformity of the coating, and when the real-time coating thickness is within the standard coating thickness range, the control device determines that the formed adhesive layer is uniform, then the to-be-processed fabric is moved to the upper part of the coating detection device for adhesion test, if the to-be-processed fabric has edge curling or the middle position coating is bulging, that is, the coating is separated from the fabric, it is determined that the to-be-processed fabric is unqualified, the control parameters of the coating device are selectively adjusted to meet the operation requirements of batch production of the composite fabric, and the to-be-processed fabric is subjected to the pressing treatment to ensure the drapability of the composite fabric.

[0053] The coating processing machine in the embodiment can work automatically and continuously, the coating paste is a solvent-based polyurethane coating agent, the coating material is a thermoplastic polyurethane resin, and the solvent used is dimethylformamide, so that the surface layer is dissolved when the adhesive is applied, which is beneficial to better laminating, the preset initial proportion is 1:1, the to-be-processed fabric is subjected to the uniformity test and the adhesion test, the concentration of the coating paste is changed by adjusting the volume of the solvent, or the coating amount is changed, the combination amount of the coating and the fabric is accurately controlled, and the coating accuracy can reach 1g / m 2, the first heat source 6 and the second heat source 10 are ovens, which are arranged below the transfer device 4, the coating head arranged on the transfer device 4 is made of steel, which can apply extremely low coating amount to ensure the coating precision and will not scratch and damage the transfer paper, the coating blade can be automatically positioned and operated, the control device can control the gap distance of the rolling device 7, the unwinding device and the winding device are controlled to realize the cloth guiding operation and accurately control the movement of the transfer paper, the transfer device 4 further comprises a double-turntable winding device to realize continuous production, the coating finishing of the fabric adopts a dry process, which is beneficial to improve the softness and drape of the composite fabric, the dry lamination process comprises using a reactive adhesive with a low melting temperature, applying the adhesive on the coating head, and then drying at 80-100℃, when it comes out of the oven without solvent, it is heated to 130℃, which is the preset transfer temperature, the unwinding device 1 inputs the fabric to be finished into the rolling device 7 for lamination, at this temperature, the heat-sensitive adhesive becomes very sticky, and its sensitivity to the slight changes of the transfer pressure, the fabric coating thickness or the coating amount is small, so that the adhesive through the fabric can be accurately and uniformly controlled through the uniformity test and the adhesion test.

[0054] Specifically, in the step S3, when the coating paste is coated on the transfer paper with the preset coating amount, the transfer paper is heated by the first heat source 6, the control device obtains the real-time transfer temperature detected by the temperature sensor arranged on the transfer device 4, and when it is determined that the real-time transfer temperature reaches the preset transfer temperature, the transfer device 4 is controlled to place the transfer paper on the composite fabric to be formed into the fabric to be finished.

[0055] The preset coating amount represents the standard amount of the coating paste that can be attached to the fabric, which can be set to 5mg-30mg according to the working area of the composite fabric and the physical properties of the coating paste;

[0056] The preset transfer temperature represents the set temperature for lamination, which is related to the properties of the coating paste, the material of the fabric and the process requirements of the composite material, and is generally set to 100℃-180℃, which can be set to 130℃;

[0057] The polyurethane solution is coated on the detachable transfer paper treated with silicon with the preset coating amount, and then a second layer of polyurethane solution is applied, and then dried at 80℃-100℃, and then the fabric is overlapped with the transfer paper while it is still wet, and laminated through a pair of rollers, and the textured metal roller 8 is pressed together, and the laminated fabric and the transfer paper are separated after drying.

[0058] Specifically, the control device is provided with a standard thickness deviation value, the unwinding device 1 inputs the fabric to be arranged into the rolling device 7 for laminating treatment, and when the rolling device 7 is output, the control device obtains the maximum thickness deviation value of the fabric to be arranged by the laser thickness gauge 3, and judges the maximum thickness deviation value according to the standard thickness deviation value,

[0059] If the maximum thickness deviation value is less than or equal to the standard thickness deviation value, the control device judges the real-time coating thickness according to the standard coating thickness range to adjust the working state of the coating arrangement machine;

[0060] If the maximum thickness deviation value is greater than the standard thickness deviation value, the control device obtains a plurality of simulated coating units corresponding to the maximum thickness deviation value, judges the position of each simulated coating unit in the coating thickness imaging to select the adjustment of the preset transfer pressure or the preset coating amount.

[0061] The standard thickness deviation value represents the set allowed thickness deviation, that is, the smaller thickness variation of the coating paste applied on the fabric in a unit area. The set value is related to the concentration of the coating paste, the preset coating amount and the area of the composite fabric, and is generally set to be between 5 microns and 10 microns;

[0062] By setting the standard thickness deviation value, the control device judges the maximum thickness deviation value according to the standard thickness deviation value. The maximum thickness deviation value represents the maximum thickness variation of the coating paste applied on the fabric in a unit area. If the maximum thickness deviation value is less than or equal to the standard thickness deviation value, it means that the maximum thickness variation of the coating paste applied on the fabric in a unit area is small, and the thickness variation is small as a whole, that is, the coating thickness variation is uniform. If the maximum thickness deviation value is greater than the standard thickness deviation value, it means that the maximum thickness variation of the coating paste applied on the fabric in a unit area is significantly increased, and the position with larger thickness is judged to determine the reason for the increase of the coating thickness.

[0063] Specifically, the control device is provided with a standard coating thickness range. When the control device judges that the maximum thickness deviation value is less than or equal to the standard thickness deviation value, the real-time coating thickness of the fabric to be arranged is obtained, and the real-time coating thickness is judged according to the standard coating thickness range,

[0064] If the real-time coating thickness is less than the standard coating thickness range, the control device adjusts the preset coating amount;

[0065] If the real-time coating thickness is within the standard coating thickness range, the control device judges the bonding state of the adhesive layer and the fabric to determine whether the laminated fabric to be arranged is qualified;

[0066] If the real-time coating thickness is greater than the standard coating thickness range, the control device acquires the initial solvent volume of the solvent, calculates the supplementary solvent volume, adds the supplementary solvent volume of the solvent into the stirring device 11 to adjust the preset initial proportion;

[0067] Wherein, Mc'=Mc x [1-(Hs-Hb1) / Hs], Va=Vc x [1+(Hs-Hb2) / Hs] x 50%, Mc' represents the calculated adjusted preset coating amount, Mc represents the acquired preset coating amount before adjustment, Hs represents the real-time coating thickness of the fabric to be finished, Vc represents the initial solvent volume of the solvent constituting the preset initial proportion, Hb1 represents the set first coating thickness, and Hb2 represents the set second coating thickness.

[0068] The first coating thickness and the second coating thickness constitute a standard coating thickness range, the standard coating thickness range represents the set coating paste thickness range coated on the fabric, and the set value is related to the operation requirement of the composite fabric and is generally set to be between 5 microns and 20 microns.

[0069] By setting the standard coating thickness range, the control device judges the real-time coating thickness according to the standard coating thickness range. If the control device judges that the real-time coating thickness is less than the standard coating thickness range, it means that the coating paste thickness coated on the fabric is relatively thin, that is, the coating paste content is relatively low, and the preset coating amount is increased. If the control device judges that the real-time coating thickness is within the standard coating thickness range, it means that the coating thickness meets the operation requirement of the composite fabric, and whether the coating and the fabric are bonded is judged. If the control device judges that the real-time coating thickness is greater than the standard coating thickness range, it means that the coating paste thickness coated on the fabric is relatively large, that is, the coating paste content is relatively high, and the preset initial proportion is adjusted to dilute the coating paste and increase the content of volatile solvent and reduce the amount of glue.

[0070] Specifically, when the control device judges that the maximum thickness deviation value is greater than the standard thickness deviation value, it acquires a plurality of simulated coating units corresponding to the maximum thickness deviation value, judges the positions of the simulated coating units in the coating thickness imaging,

[0071] If there is a simulated coating unit located in the internal area corresponding to the transfer paper, the control device will adjust the preset transfer pressure;

[0072] If there is no simulated coating unit located in the internal area corresponding to the transfer paper, the control device will adjust the preset coating amount;

[0073] Pc' = Pc x [1 + (AHm - AHb) / AHm], Mc" = Mc x [1 - (AHm - AHb) / AHm], wherein Pc' represents the calculated adjusted preset transfer pressure, Pc represents the obtained preset transfer pressure before adjustment, Mc" represents the calculated adjusted preset coating amount, Mc represents the obtained preset coating amount before adjustment, AHm represents the calculated maximum thickness deviation value, and AHb represents the set standard thickness deviation value.

[0074] The preset transfer pressure represents the pressure applied during the lamination process, which is related to the model of the rolling device, the characteristics of the coating paste, and the process requirements of the composite fabric, and is generally set to be between 50 MPa and 90 MPa.

[0075] The internal area represents the area corresponding to the projection area of the transfer paper. The reason for the increase in coating thickness can be determined by the distribution state of the coating. The coating thickness between each interval point, i.e., the thickness of each simulated coating unit, is obtained by the laser thickness gauge 3, and it is determined whether the area with a large coating thickness difference is outside or inside the transfer paper contour. If the control device determines that there is a simulated coating unit located in the internal area corresponding to the transfer paper, it indicates that the coating is thicker inside the transfer paper contour. This is because the pressure applied to the coating is too small, resulting in incomplete flattening of the coating, and the preset transfer pressure needs to be adjusted. If the control device determines that there is no simulated coating unit located in the internal area corresponding to the transfer paper, it indicates that the coating is thicker outside the transfer paper contour. This indicates that the coating thickness inside the transfer paper contour is within the standard value, while the coating is thicker outside the transfer paper contour. This is because the coating paste is excessive, resulting in an excessively large coating area, and the preset coating amount needs to be adjusted.

[0076] Specifically, when the control device determines that the real-time coating thickness is within the standard coating thickness range, it controls the unwinding device 1 to move the fabric to be arranged to the upper part of the coating detection device for adhesion test, and obtains the shape of the fabric to be arranged by the laser thickness gauge 3 to determine the adhesion state of the glue layer and the fabric.

[0077] If the glue layer and the fabric are separated in the fabric to be arranged, the control device determines that the fabric to be arranged after lamination is unqualified, the transfer device 4 removes the current transfer paper, and repeats the above operation of applying the coating paste to another transfer paper with a preset coating amount for adhesion test. If it is determined again that the glue layer and the fabric are separated in the fabric to be arranged, the fabric to be arranged is subjected to compression treatment at a preset composite temperature.

[0078] If the glue layer and the fabric are not separated in the fabric to be arranged, the control device directly performs compression treatment on the fabric to be arranged.

[0079] The control device determines the separation of the glue layer and the fabric in the fabric to be arranged. If the solvent is volatile, it will cause the coating to form bubbles or defects during the volatilization process, which will affect the adhesion of the glue layer and the fabric. The third layer of polyurethane solution is applied, and the fabric is overlapped with the fabric when it is still wet. The embossed metal roller 8 is pressed to ensure that the glue layer and the fabric have sufficient contact time. The unqualified fabric to be arranged is compounded with the coating paste again. If the control device determines that the glue layer and the fabric in the fabric to be arranged are not separated, it is directly pressed and processed.

[0080] Specifically, the control device is provided with a preset composite temperature. When the control device determines that the glue layer and the fabric in the fabric to be arranged are separated, it controls the unwinding device 1 to move the fabric to be arranged to the upper part of the second heat source 10 to heat the fabric to be arranged at the preset composite temperature. The control device obtains the real-time transfer temperature detected by the temperature sensor arranged on the transfer device 4. When it is determined that the real-time transfer temperature reaches the preset composite temperature, the unwinding device 1 is controlled to move the fabric to be arranged to pass through the embossed metal roller 8 for pressing and processing, and the air compressor 501 is connected with the second connecting pipe 504. The adhesion test is performed again to form a transfer coating composite fabric.

[0081] The preset composite temperature represents the temperature set for the pressing and processing of the unqualified fabric to be processed by the laminating process. It is generally set to 110-120°C. Because high temperature will change the viscosity and fluidity of the coating paste, and the higher the temperature, the lower the viscosity, the set value is lower than the preset transfer temperature, so as to increase the viscosity of the coating paste on the basis of ensuring good fluidity of the coating paste, thereby improving the adhesion effect of the coating paste and the fabric;

[0082] By pressing and processing the unqualified fabric to be processed after the laminating process at the preset composite temperature, the temperature condition is changed for pressing and processing the fabric to be processed. By reducing the hot pressing temperature, the viscosity of the coating paste is increased, and the adhesion effect is increased. The pressing and processing can also perform embossing treatment on the fabric to be processed, so as to produce a concave-convex pattern on the composite fabric. If the fabric to be processed after the laminating process is qualified, it means that the adhesion effect is good, and the pressing and processing is directly performed, that is, the embossing is performed.

[0083] Specifically, the coating detection device comprises an air compressor 501, a first connecting barrel 503 connected with the air compressor 501 through a first connecting pipe 502, and a second connecting barrel 505 connected with the air compressor 501 through a second connecting pipe 504, the first connecting barrel 503 or the second connecting barrel 505 is connected with the fabric to be finished through a sealing ring 506, and the control device can control the air compressor 501 to deliver air flow to the fabric to be finished through the first connecting barrel 503 or the second connecting barrel 505.

[0084] After the fabric to be processed is subjected to laminating treatment, the air compressor 501 is controlled to deliver air flow to the fabric to be finished through the first connecting barrel 503 for adhesion test, and after the fabric to be processed is subjected to pressing treatment, the air compressor 501 is controlled to deliver air flow to the fabric to be finished through the second connecting barrel 505 for adhesion test.

[0085] The air compressor 501 delivers air flow to the center of the composite fabric, and when the air flow flows through the surface of the fabric, a pressure difference is generated, so that the fabric is subjected to an upward force, causing the coating and the fabric to swell upward. Because the weights of the fabric and the coating are different, if the coating and the fabric are not completely attached, when the air flow flows through the surface of the fabric and the coating, the swelling amplitude of the coating and the fabric will be different. If the coating and the fabric are completely attached, when the air flow flows through the surface of the fabric and the coating, the swelling amplitude of the coating and the fabric is the same frequency. Through the adhesion test, the control device judges the separation state and the separation degree of the coating and the fabric, so as to determine whether the fabric to be processed is qualified.

[0086] Specifically, the coating finishing machine comprises the coating detection device, the laser thickness gauge 3, the unwinding device 1, the winding device 2, the hair removal device, the spraying device, the stirring device 11, the transfer device 4, the first heat source 6, the rolling device 7, the embossed metal roller 8, and the control device. The coating detection device is used to test the adhesion of the fabric to be finished, the laser thickness gauge 3 is used to detect the coating thickness image of the fabric to be finished and obtain the shape of the fabric to be finished, the transfer device 4 is used to contact one side of the coating paste coated on the transfer paper with the composite fabric to be finished, the rolling device 7 comprises a pair of rollers for laminating treatment of the fabric to be finished, and the embossed metal roller 8 is used for pressing treatment of the qualified fabric to be finished.

[0087] Specifically, the process of the control device obtaining the maximum thickness deviation value of the fabric to be finished is as follows,

[0088] The coating thickness imaging is divided into a plurality of simulated coating units by using vertical lines, the average coating thickness in each simulated coating unit is calculated respectively and recorded as a simulated coating thickness, the simulated coating thickness values are added and then divided by the number of simulated coating units to obtain the real-time coating thickness of the fabric to be arranged, and the real-time coating thickness is subtracted from each simulated coating thickness to obtain a plurality of coating thickness difference values, the absolute value of each coating thickness difference value is taken to obtain the maximum value among the numerical values of each absolute value as the maximum thickness deviation value.

[0089] wherein, ΔHm=max{|ΔHi|}, ΔHi=Hs-Hi, i=1, 2, …n, ΔHm represents the calculated maximum thickness deviation value, n is the number of simulated coating units obtained by dividing the coating thickness imaging into a plurality of simulated coating units by using vertical lines, ΔHi represents the coating thickness difference value corresponding to each simulated coating unit, Hi represents the simulated coating thickness of each simulated coating unit calculated, and Hs represents the real-time coating thickness of the fabric to be arranged.

[0090] By dividing the coating thickness imaging into a plurality of simulated coating units, i.e., simulating the segmentation of the coating thickness, the average thickness of each region is calculated as the simulated coating thickness of each simulated coating unit, the average value of each simulated coating thickness is calculated as the real-time coating thickness, the thickness difference value is calculated by comparing the real-time coating thickness with the simulated coating thickness, the maximum thickness difference value is selected as the maximum thickness deviation value, and the calculation accuracy is ensured.

[0091] In the present embodiment, the laser thickness gauge 3 measurement process is to install two laser sensors above and below the fabric, fix the sensors on the bracket, ensure that the lasers of the two sensors can be on the same point, and start sampling the surface of the measured object as the measured object moves, respectively measure the distances between the upper and lower surfaces of the fabric to be arranged and the upper and lower pairs of laser displacement sensors, and transmit the measurement values to the control device to calculate the thickness values; the coating thickness imaging is to divide the monitoring area on the upper surface of the fabric to be processed into equidistant grids, measure the thickness data in each grid and transmit it to the control device for calculation.

[0092] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after these changes or replacements will all fall within the protection scope of the present application.

[0093] The above merely illustrates the preferred embodiments of the present application, and is not used to limit the present application; for those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for preparing a composite coating based on a transfer coating, characterized in that The application relates to a coating finishing machine. Step S1: a rewinding device unwinds a to-be-combined fabric, a dehairing device cleans the surface of the to-be-combined fabric, and an anti-static spraying agent is sprayed on the to-be-combined fabric through a spraying device and is dried; Step S2: coating material is added into a solvent at a preset initial proportion to form a coating paste, and the coating paste is dispersed through a stirring device; Step S3: the coating paste is coated on transfer paper at a preset coating amount, the transfer paper is placed on the to-be-combined fabric at a preset transfer temperature through a transfer device to form a to-be-finished fabric, the to-be-finished fabric is conveyed through the rewinding device, and the to-be-finished fabric is laminated through a rolling device at a preset transfer pressure; the real-time coating thickness of the to-be-finished fabric output from the rolling device is detected, and when the real-time coating thickness is within a standard coating thickness range, the to-be-finished fabric is moved to the upper part of a coating detection device for adhesion test to determine whether the to-be-finished fabric after the laminating treatment is qualified; A standard thickness deviation value is arranged in a control device, the rewinding device inputs the to-be-finished fabric into the rolling device for laminating treatment, the control device obtains the coating thickness imaging of the to-be-finished fabric after the laminating treatment through a laser thickness gauge, obtains a maximum thickness deviation value of the to-be-finished fabric, and judges the maximum thickness deviation value according to the standard thickness deviation value, If the maximum thickness deviation value is less than or equal to the standard thickness deviation value, the control device judges the real-time coating thickness according to the standard coating thickness range to adjust the working state of the coating finishing machine; If the maximum thickness deviation value is greater than the standard thickness deviation value, the control device obtains a plurality of simulated coating units corresponding to the maximum thickness deviation value, judges the positions of the simulated coating units in the coating thickness imaging to select the preset transfer pressure or the preset coating amount for adjustment; The control device is provided with a standard coating thickness range, and when the control device judges that the maximum thickness deviation value is less than or equal to the standard thickness deviation value, the real-time coating thickness of the to-be-finished fabric is obtained, and the real-time coating thickness is judged according to the standard coating thickness range, If the real-time coating thickness is less than the standard coating thickness range, the control device adjusts the preset coating amount; If the real-time coating thickness is within the standard coating thickness range, the control device judges the adhesion state of the glue layer and the fabric to determine whether the to-be-finished fabric after the laminating treatment is qualified; If the real-time coating thickness is greater than the standard coating thickness range, the control device obtains an initial solvent volume of the solvent, calculates a supplementary solvent volume, and adds the supplementary solvent volume of the solvent into the stirring device to adjust the preset initial proportion; Step S4: when the to-be-finished fabric after the laminating treatment is determined to be qualified, the to-be-finished fabric is subjected to pressing treatment; when the to-be-finished fabric after the laminating treatment is determined to be unqualified, the laminating treatment is repeated once, and when the to-be-finished fabric after the laminating treatment is determined to be unqualified again, the to-be-finished fabric is subjected to pressing treatment at a preset combining temperature to form a transfer coating combined fabric. The control device controls the unwinding device to move the fabric to be finished to the upper part of the coating detection device for adhesion test and obtains the shape of the fabric to be finished by the laser thickness gauge to determine the adhesion state of the glue layer and the fabric, If the glue layer and the fabric separate in the fabric to be finished, the control device determines that the fabric to be finished after laminating treatment is unqualified, the transfer device removes the current transfer paper, repeats the above operation of coating the coating paste on another transfer paper with a preset coating amount for adhesion test, and if the glue layer and the fabric separate in the fabric to be finished again, the pressure bonding treatment is performed at a preset composite temperature; If the glue layer and the fabric do not separate in the fabric to be finished, the control device directly performs pressure bonding treatment on the fabric to be finished. The control device is provided with a preset composite temperature, and when the control device determines that the glue layer and the fabric separate in the fabric to be finished, the control device controls the unwinding device to move the fabric to be finished to the upper part of the second heat source to heat the fabric to be finished at a preset composite temperature. The control device obtains the real-time transfer temperature detected by the temperature sensor arranged on the transfer device, and when it is determined that the real-time transfer temperature reaches the preset composite temperature, the control device controls the unwinding device to move the fabric to be finished to pass through the textured metal roller to perform pressure bonding treatment on the fabric to be finished, and controls the air compressor to be connected with the second connecting pipe to perform adhesion test again to form the transfer coating composite fabric. Step S5, after the transfer coating composite fabric is dried and cooled, the transfer paper is peeled off into a roll, and the transfer coating composite fabric of the peeled transfer paper is wound by the winding device to form a composite fabric.

2. The method of claim 1, wherein the transfer coating is applied by a method selected from the group consisting of: dip coating, flow coating, spin coating, spray coating, and combinations thereof. In the step S3, when the coating paste is coated on the transfer paper with a preset coating amount, the transfer paper is heated by the first heat source, the control device obtains the real-time transfer temperature detected by the temperature sensor arranged on the transfer device, and when it is determined that the real-time transfer temperature reaches the preset transfer temperature, the control device controls the transfer device to place the transfer paper on the fabric to be compounded to form the fabric to be finished.

3. The method of claim 1, wherein the transfer coating is applied by a method selected from the group consisting of: dip coating, spray coating, spin coating, and combinations thereof. When the control device determines that the maximum thickness deviation value is greater than the standard thickness deviation value, the control device determines the positions of the simulated coating units corresponding to the maximum thickness deviation value, If there is a simulated coating unit located in the corresponding internal area of the transfer paper, the control device adjusts the preset transfer pressure; If there is no simulated coating unit located in the corresponding internal area of the transfer paper, the control device adjusts the preset coating amount.

4. The method of claim 1, wherein the transfer coating is applied by a method selected from the group consisting of: dip coating, spray coating, spin coating, and combinations thereof. The coating detection device comprises an air compressor, a first connecting barrel connected with the air compressor through a first connecting pipe, and a second connecting barrel connected with the air compressor through a second connecting pipe. The first connecting barrel or the second connecting barrel is connected with the fabric to be finished through a sealing ring, and the control device can control the air compressor to send air flow to the fabric to be finished through the first connecting barrel or the second connecting barrel.

5. The method of claim 1, wherein the transfer coating is applied by a method selected from the group consisting of: dip coating, spray coating, spin coating, and combinations thereof. The coating finishing machine comprises the coating detection device, the laser thickness gauge, the unwinding device, the winding device, the deburring device, the spraying device, the stirring device, the transfer device, the first heat source, the rolling device, the textured metal roller and the control device, the coating detection device is used for performing adhesion test on the fabric to be finished, the laser thickness gauge is used for detecting coating thickness image of the fabric to be finished and obtaining the shape of the fabric to be finished, the transfer device is used for contacting one side of the transfer paper coated with the coating paste with the fabric to be compounded, the rolling device comprises a pair of rollers and is used for performing lamination treatment on the fabric to be finished, and the textured metal roller is used for performing pressing treatment on the fabric to be finished.

6. The method of claim 1, wherein the transfer coating is applied by a method selected from the group consisting of: dip coating, spray coating, spin coating, and combinations thereof. The control device obtains the maximum thickness deviation value of the fabric to be finished in the following process, The coating thickness image is divided into a plurality of simulated coating units by vertical lines, the average coating thickness in each simulated coating unit is calculated and recorded as a simulated coating thickness, the simulated coating thickness values are added and divided by the number of simulated coating units to obtain the real-time coating thickness of the fabric to be finished, and the real-time coating thickness is subtracted from each simulated coating thickness to obtain a plurality of coating thickness difference values, the absolute value of each coating thickness difference value is taken, and the maximum value of the absolute values is obtained as the maximum thickness deviation value. Wherein, ΔHm=max{|ΔHi|}, ΔHi=Hs-Hi, i=1, 2, ……n, ΔHm represents the calculated maximum thickness deviation value, n is the number of simulated coating units divided by the coating thickness image by vertical lines, ΔHi represents the coating thickness difference value corresponding to each simulated coating unit, Hi represents the simulated coating thickness of each simulated coating unit, and Hs represents the real-time coating thickness of the fabric to be finished.

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