A wet wipe liquid spraying device and method for wet wipe production

Abstract

The present invention discloses a wet wipe liquid spraying device and method for wet wipe production, including: a bottom plate, a control system for realizing full-automatic wet wipe liquid spraying by using a controller, and a spraying mechanism installed on the top of the bottom plate for spraying wet wipe liquid onto a wet wipe substrate; the wet wipe substrate includes: an oil absorption layer and a water absorption layer arranged at the bottom of the oil absorption layer; a plurality of feeding devices are installed on the top of the bottom plate on the side of the wet wipe substrate; by adopting a specific spraying process, the wet wipe liquid sprayed in a small amount on the water absorption layer forms a liquid conduction path, providing a direct penetration path for the wet wipe liquid of the oil absorption layer, avoiding excessive accumulation of the liquid on the surface of the oil absorption layer, improving the wetting effect, and on the other hand, being able to form a tiny liquid bridge connection between the fibers of the water absorption layer and the oil absorption layer to absorb the oil absorption layer, enhancing the penetration rate of the oil absorption layer, avoiding the formation of local over-wet areas on the surface of the oil absorption layer, ensuring the consistency of the wetting degree, and thus improving the oil removal effect of the wet wipe substrate.

Description

Technical Field

[0001] The present invention relates to the field of liquid-phase treatment of textile materials, particularly to spraying or jetting, and specifically to a wet wipe liquid spraying device and method for wet wipe production. Background Art

[0002] In daily life, oil-removing wet wipes, as a convenient and efficient cleaning tool, are widely used in various occasions such as kitchens, industrial production lines, and automotive repairs for quickly removing impurities such as grease and stains. With the growing demand of consumers for efficient and convenient cleaning solutions, oil-removing wet wipes have been widely welcomed due to their immediate availability, no need for additional water washing steps, and portability. Such wet wipes usually consist of multiple layers of materials.

[0003] Existing oil-removing wet wipe spraying devices usually adopt a single spraying method, that is, directly spraying the wet wipe liquid onto a certain layer of the wet wipe, and then spraying another layer. Although this method is simple and easy to implement, it is difficult to ensure the uniform distribution of the wet wipe liquid in the wet wipe. The water absorption differences between materials of different layers are often large. If a large amount of spraying is directly carried out, the wet wipe liquid may stay on the material surface for too long. Due to the accumulation of liquid on the surface, local over-wet areas may also be formed, resulting in inconsistent overall wetness of the wet wipe and further reducing the oil-removing performance.

[0004] Therefore, it is necessary to improve the deficiencies in the prior art to solve the above problems. Summary of the Invention

[0005] The present invention overcomes the deficiencies of the prior art and provides a wet wipe liquid spraying device and method for wet wipe production.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a wet wipe liquid spraying device for wet wipe production, including: a bottom plate, a control system for realizing fully automatic wet wipe liquid spraying by using a controller, and a spraying mechanism installed on the top of the bottom plate for spraying wet wipe liquid onto a wet wipe substrate;

[0007] The wet wipe substrate includes: an oil-absorbing layer and a water-absorbing layer provided at the bottom of the oil-absorbing layer; several feeding devices for feeding the wet wipe substrate are installed on the top of the bottom plate on the side of the wet wipe substrate;

[0008] The spraying mechanism includes: three groups of spraying heads provided on the top of the bottom plate, and several mounting plates provided on one side of each group of spraying heads; a support plate is fixed to the side of several spraying heads in each group, and one side of the support plate is installed on one side of several mounting plates; the distribution mode of the three groups of spraying heads is: the spraying end of a group of spraying heads in the middle faces the top of the oil-absorbing layer, and the spraying ends of the two groups of spraying heads on both sides face the bottom of the water-absorbing layer;

[0009] On both sides of the bottom plate, there are respectively an oil absorption liquid tank for carrying the wet wipe liquid of the oil absorption layer and a water absorption liquid tank for carrying the wet wipe liquid of the water absorption layer. On the sides of both the oil absorption liquid tank and the water absorption liquid tank, there is an infusion assembly for delivering the wet wipe liquid to the liquid inlet end of the spraying head.

[0010] In a preferred embodiment of the present invention, several of the spraying heads in each group are evenly distributed in a linear array along the width direction of the wet wipe substrate; the bottom of the mounting plate is fixed to the top of the bottom plate, the spraying mechanism is located between several of the feeding devices, and the control system is electrically connected to both the feeding devices and the spraying heads.

[0011] In a preferred embodiment of the present invention, the material of the oil absorption layer is one of polyester or nylon; the material of the water absorption layer is one of viscose fiber or cotton fiber.

[0012] In a preferred embodiment of the present invention, the infusion assembly includes: several water pumps arranged on one side of the bottom plate, and infusion pipes installed at the output ends of the water pumps; the side of the infusion pipe near one end is fixed to the liquid inlet ends of several of the spraying heads, and the water pumps are electrically connected to the control system.

[0013] In a preferred embodiment of the present invention, a group of the water pumps is arranged on the side of the oil absorption liquid tank, and the input end is fixed to the side of the oil absorption liquid tank, and the infusion pipe at the output end is connected to a group of the spraying heads located in the middle; two groups of the water pumps are arranged on the side of the water absorption liquid tank, and the input ends are both fixed to the side of the water absorption liquid tank, and the infusion pipes at the output ends are respectively connected to two groups of the spraying heads located on both sides.

[0014] In a preferred embodiment of the present invention, a lifting assembly is arranged on the side of the mounting plate. The lifting assembly includes: a cylinder and a linear guide rail fixed to one side of the mounting plate, and a moving plate installed on one side of the support plate; the output end of the cylinder is fixed to one side of the moving plate, the side of the moving plate is slidably connected to the side of the linear guide rail, and the cylinder is electrically connected to the control system.

[0015] In a preferred embodiment of the present invention, a limiting block is fixed to one side of the mounting plate, a limiting rod is fixed to one side of the limiting block, and one end of the limiting rod faces one side of the moving plate.

[0016] The present invention provides a spraying method for a wet wipe liquid spraying device in wet wipe production, including the following steps:

[0017] S1. Pass the side of the wet wipe substrate to be sprayed through several feeding devices, and make the oil-absorbing layer of the wet wipe substrate face the spraying ends of a group of spraying heads located in the middle, and the water-absorbing layer face the spraying ends of two groups of spraying heads located on both sides;

[0018] S2. Through the control system, control several feeding devices to realize the feeding of the wet wipe substrate. At the same time, control the liquid infusion assembly to transport the oil-absorbing layer wet wipe liquid inside the oil-absorbing liquid tank to a group of spraying heads located in the middle, and transport the water-absorbing layer wet wipe liquid inside the water-absorbing liquid tank to two groups of spraying heads located on both sides;

[0019] S3. Through the control system, according to the advancing direction of the wet wipe substrate, control a group of spraying heads on one side to spray the water-absorbing layer wet wipe liquid on the water-absorbing layer for the first time, a group of spraying heads in the middle to spray the oil-absorbing layer wet wipe liquid on the oil-absorbing layer, and a group of spraying heads on the other side to spray the water-absorbing layer wet wipe liquid on the water-absorbing layer for the second time, so as to realize the full-automatic and continuous spraying of the wet wipe liquid.

[0020] In a preferred embodiment of the present invention, in the step of S3, the liquid flow rate of the first spraying of the water-absorbing layer wet wipe liquid is 0.4 - 0.8 L / min, and the liquid pressure is 6 - 10 MPa; the liquid flow rate of the spraying of the oil-absorbing layer wet wipe liquid is 1.5 - 2 L / min, and the liquid pressure is 6 - 10 MPa; the liquid flow rate of the second spraying of the water-absorbing layer wet wipe liquid is 1 - 1.5 L / min, and the liquid pressure is 6 - 10 MPa.

[0021] In a preferred embodiment of the present invention, the water-absorbing layer wet wipe liquid contains a surfactant with a concentration of 3 - 8 wt% and a penetration aid with a concentration of 2 - 5 wt%; the surfactant is one of sodium alkylbenzene sulfonate or fatty alcohol polyoxyethylene ether, and the penetration aid is one of glycerol or propylene glycol.

[0022] The present invention solves the defects existing in the background technology, and the present invention has the following beneficial effects:

[0023] The present invention provides a wet wipe liquid spraying device and method for wet wipe production. By adopting a spraying process of first spraying a small amount of water-absorbing layer wet wipe liquid on the water-absorbing layer, then spraying the oil-absorbing layer wet wipe liquid on the oil-absorbing layer, and finally spraying the water-absorbing layer wet wipe liquid on the water-absorbing layer for supplementary spraying. On the one hand, the small amount of sprayed water-absorbing layer wet wipe liquid has formed a liquid conduction path, providing a direct penetration path for the oil-absorbing layer wet wipe liquid, avoiding excessive accumulation of the oil-absorbing layer liquid on the surface, improving the wetting effect. On the other hand, it can form a small liquid bridge connection between the water-absorbing layer and the oil-absorbing layer fibers to absorb the oil-absorbing layer, improve the penetration rate of the oil-absorbing layer, avoid the formation of local over-wet areas on the surface of the oil-absorbing layer, ensure the consistency of the wetness, and thus improve the oil removal effect of the wet wipe substrate.

[0024] In the present invention, by adding appropriate amounts of surfactant and penetration enhancer to the liquid in the water-absorbing layer, the surfactant can reduce the surface tension of the liquid, form a microemulsion structure, make the liquid spread and penetrate into the material more easily, and help the oil-absorbing layer wet wipe liquid penetrate faster, thereby enhancing the wettability of the oil-absorbing layer material and promoting the uniform distribution of the liquid. The penetration enhancer can form a bridge between the liquid and the material, help the oil-absorbing layer liquid penetrate faster, not only maintain the softness and water absorption of the water-absorbing layer, but also act as a moisturizing component to prevent the hand skin from drying, thereby further improving the oil removal efficiency.

[0025] In the present invention, by using a material with strong oil absorption performance such as polyester or nylon for the oil-absorbing layer, the oil can be quickly adsorbed and locked, preventing it from penetrating into the water-absorbing layer. Using a material with strong water absorption performance and softness such as viscose fiber or cotton fiber for the water-absorbing layer can not only absorb excess water, but also provide a comfortable touch, reducing the contact between the hand and the oil stain. Thus, the combination of the oil-absorbing layer and the water-absorbing layer materials can give full play to the oil absorption and water absorption performance of the wet wipe.

[0026] In the present invention, by providing a lifting assembly on the side of the mounting plate, the control system can control the telescopic movement of the cylinder. With the cooperation of the cylinder, linear guide rail and moving plate, the distance between the spray head and the wet wipe substrate can be adjusted according to the thickness of the wet wipe substrate and the spraying requirements, so as to ensure that the wet wipe liquid can be evenly and accurately sprayed on the surface of the wet wipe substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings;

[0028] Figure 1 is a three-dimensional structure and a partial enlarged view of the preferred embodiment of the present invention;

[0029] Figure 2 is a three-dimensional structure diagram of the spraying mechanism of the preferred embodiment of the present invention;

[0030] Figure 3 is an overall top view structure diagram of the preferred embodiment of the present invention;

[0031] In the figure: 1, bottom plate; 2, spraying mechanism; 21, spray head; 22, mounting plate; 23, support plate; 3, wet wipe substrate; 31, oil-absorbing layer; 32, water-absorbing layer; 4, feeding device; 5, oil-absorbing liquid tank; 6, water-absorbing liquid tank; 7, water pump; 71, infusion tube; 8, cylinder; 81, linear guide rail; 82, moving plate; 9, limit block; 91, limit rod. Detailed implementation manners

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0036] It should be noted that the wet wipe liquid spraying equipment of the present invention is preferably applicable to the production of wet wipe liquid spraying for oil-removing wet wipes with a two-layer structure. The oil-removing wet wipes with a two-layer structure have an oil-absorbing surface layer and a water-absorbing surface layer. The water-absorbing surface layer is used to contact the hand, and the oil-absorbing surface layer contacts the oil stain, avoiding the defect that when using traditional oil-removing wet wipes, one or both sides are penetrated, resulting in the contact between the oil stain and the hand. The raw materials, equipment, reagents, etc. used in the present invention can all be obtained through market purchase or by means of existing technology preparation methods.

[0037] As Figure 1 , Figure 2 and Figure 3 shown, a wet wipe liquid spraying equipment for wet wipe production includes: a bottom plate 1, a control system for realizing fully automatic wet wipe liquid spraying by using a controller, and a spraying mechanism 2 installed on the top of the bottom plate 1 for spraying wet wipe liquid onto a wet wipe substrate 3; the wet wipe substrate 3 includes: an oil-absorbing layer 31 and a water-absorbing layer 32 provided at the bottom of the oil-absorbing layer 31; a plurality of feeding devices 4 for feeding the wet wipe substrate 3 are installed on the top of the bottom plate 1 on the side of the wet wipe substrate 3; the spraying mechanism 2 includes: three groups of spraying heads 21 provided on the top of the bottom plate 1, and a plurality of mounting plates 22 provided on one side of each group of spraying heads 21; a support plate 23 is fixed to the side of a plurality of spraying heads 21 in each group, and one side of the support plate 23 is installed on one side of the plurality of mounting plates 22; the distribution mode of the three groups of spraying heads 21 is: the spraying ends of the group of spraying heads 21 located in the middle face the top of the oil-absorbing layer 31, and the spraying ends of the two groups of spraying heads 21 located on both sides face the bottom of the water-absorbing layer 32; an oil-absorbing liquid tank 5 for carrying the wet wipe liquid of the oil-absorbing layer 31 and a water-absorbing liquid tank 6 for carrying the wet wipe liquid of the water-absorbing layer 32 are respectively arranged on both sides of the bottom plate 1, and a liquid delivery assembly for delivering the wet wipe liquid to the liquid inlet end of the spraying heads 21 is arranged on the side of each of the oil-absorbing liquid tank 5 and the water-absorbing liquid tank 6.

[0038] It should be noted that several spraying heads 21 in each group are evenly distributed in a linear array along the width direction of the wet wipe substrate 3; the bottom of the mounting plate 22 is fixed to the top of the bottom plate 1, the spraying mechanism 2 is located between several feeding devices 4, and the control system is electrically connected to the feeding devices 4 and the spraying heads 21 respectively; the bottom plate 1 serves as the support structure of the equipment, and the control system is used to realize the control of full-automatic wet wipe liquid spraying. The wet wipe substrate 3 is composed of an oil-absorbing layer 31 and a water-absorbing layer 32, which are respectively used to absorb and hold different types of wet wipe liquids. The feeding device 4 is used to transport the wet wipe substrate 3 to the lower part of the spraying mechanism 2 for spraying; the spraying mechanism 2 includes three groups of spraying heads 21, which are respectively positioned to align with different parts of the wet wipe substrate 3. One group of spraying heads 21 in the middle directly faces the top of the oil-absorbing layer 31, and the two groups on both sides face the bottom of the water-absorbing layer 32. To optimize the distribution of the liquid in the double-layer material, first spray a small amount of the water-absorbing layer 32, then spray the oil-absorbing layer 31, and finally supplement the spraying of the water-absorbing layer 32 to ensure uniform wetting and reduce liquid loss, ensuring that the wet wipe liquid can be accurately and evenly sprayed at the designated position on the wet wipe substrate 3.

[0039] Specifically, the feeding device 4 can be a cooperation structure of a power source and a transmission roller to realize the operation of feeding the wet wipe substrate 3. The specific structure is a mechanical structure that can convert rotational motion into linear motion in the prior art and belongs to the common knowledge in the field. Therefore, the control method and structure are not explained in detail in this application and will not be elaborated here; the control method of the control system and the control circuit for realizing full-automatic wet wipe liquid spraying are realized through a programmable controller and belong to the prior art. It can be realized by a person skilled in the art through programming and belongs to the common knowledge in the field. Therefore, the control method and module are not explained in detail in this application and will not be elaborated here.

[0040] In some embodiments, the material of the oil-absorbing layer 31 is one of polyester or nylon; the material of the water-absorbing layer 32 is one of viscose fiber or cotton fiber; by using a material with strong oil-absorbing performance such as polyester or nylon for the oil-absorbing layer 31, the oil can be quickly adsorbed and locked to prevent it from penetrating into the water-absorbing layer 32. By using a material with strong water-absorbing performance and softness such as viscose fiber or cotton fiber for the water-absorbing layer 32, it can not only absorb excess water but also provide a comfortable touch, reducing the contact between the hand and the oil stain. Therefore, the combination of the materials of the oil-absorbing layer 31 and the water-absorbing layer 32 can give full play to the oil-absorbing and water-absorbing properties of the wet wipe.

[0041] In some embodiments, the infusion assembly includes: several water pumps 7 arranged on one side of the bottom plate 1, and infusion tubes 71 installed at the output ends of the water pumps 7; the side of the infusion tube 71 near one end is fixed to the liquid inlet ends of several spraying heads 21, and the water pumps 7 are electrically connected to the control system.

[0042] It should be noted that a group of water pumps 7 are arranged on the side of the oil-absorbing liquid tank 5, and the input end is fixed to the side of the oil-absorbing liquid tank 5, and the liquid delivery pipe 71 at the output end is connected to a group of spraying heads 21 located in the middle; two groups of water pumps 7 are arranged on the side of the water-absorbing liquid tank 6, and the input ends are both fixed to the side of the water-absorbing liquid tank 6, and the liquid delivery pipes 71 at the output ends are respectively connected to two groups of spraying heads 21 located on both sides; the control system realizes precise control of the wet wipe liquid spraying by controlling the opening and closing of the water pump 7 and the flow rate of the liquid delivery pipe 71. The water pump 7 is used to pump the wet wipe liquid out of the liquid storage tank and transport it to the liquid inlet end of the spraying head 21 through the liquid delivery pipe 71. The oil-absorbing liquid tank 5 and the water-absorbing liquid tank 6 are respectively connected to the corresponding spraying heads 21 through their respective water pumps 7 and liquid delivery pipes 71, ensuring that different types of wet wipe liquids can be accurately sprayed at the designated positions on the wet wipe substrate 3, and improving the precision and efficiency of the wet wipe liquid spraying.

[0043] In some embodiments, a lifting assembly is arranged on the side of the mounting plate 22. The lifting assembly includes: a cylinder 8 and a linear guide rail 81 fixed to one side of the mounting plate 22, and a moving plate 82 mounted on one side of the support plate 23; the output end of the cylinder 8 is fixed to one side of the moving plate 82, and the side of the moving plate 82 is slidably connected to the side of the linear guide rail 81. The cylinder 8 is electrically connected to the control system.

[0044] It should be noted that by controlling the telescopic movement of the cylinder 8, the control system can drive the moving plate 82 to drive the support plate 23 and the spraying head 21 on the support plate 23 to move up and down, and can adjust the distance between the spraying head 21 and the wet wipe substrate 3 according to the thickness of the wet wipe substrate 3 and the spraying requirements, so as to ensure that the wet wipe liquid can be evenly and accurately sprayed on the surface of the wet wipe substrate 3.

[0045] In some embodiments, a limiting block 9 is fixed to one side of the mounting plate 22, a limiting rod 91 is fixed to one side of the limiting block 9, and one end of the limiting rod 91 faces one side of the moving plate 82.

[0046] It should be noted that through the setting of the limiting block 9, when driving the moving plate 82 to move up and down, since one end of the limiting rod 91 faces one side of the moving plate 82, after one side of the moving plate 82 contacts one end of the limiting rod 91, the moving range of the moving plate 82 can be limited, ensuring the stability and safety during lifting.

[0047] A spraying method for a wet wipe liquid spraying device in wet wipe production includes the following steps:

[0048] S1. Pass the side of the wet wipe substrate 3 to be sprayed through a plurality of feeding devices 4, and make the oil-absorbing layer 31 of the wet wipe substrate 3 face the spraying end of a group of spraying heads 21 located in the middle, and the water-absorbing layer 32 face the spraying ends of two groups of spraying heads 21 located on both sides;

[0049] S2. Through the control system, control several feeding devices 4 to realize the feeding of the wet wipe substrate 3, and at the same time control the liquid infusion assembly to transport the wet wipe liquid of the oil absorption layer 31 inside the oil absorption liquid tank 5 to a group of spraying heads 21 located in the middle, and transport the wet wipe liquid of the water absorption layer 32 inside the water absorption liquid tank 6 to two groups of spraying heads 21 located on both sides;

[0050] S3. Through the control system, according to the advancing direction of the wet wipe substrate 3, control a group of spraying heads 21 on one side to spray the wet wipe liquid of the water absorption layer 32 on the water absorption layer 32 for the first time, a group of spraying heads 21 in the middle to spray the wet wipe liquid of the oil absorption layer 31 on the oil absorption layer 31, and a group of spraying heads 21 on the other side to spray the wet wipe liquid of the water absorption layer 32 on the water absorption layer 32 for the second time, so as to realize fully automatic and continuous spraying of the wet wipe liquid.

[0051] In some embodiments, in the step of S3, the liquid flow rate of spraying the wet wipe liquid of the water absorption layer 32 for the first time is 0.4 - 0.8 L / min, and the liquid pressure is 6 - 10 MPa; the liquid flow rate of spraying the wet wipe liquid of the oil absorption layer 31 is 1.5 - 2 L / min, and the liquid pressure is 6 - 10 MPa; the liquid flow rate of spraying the wet wipe liquid of the water absorption layer 32 for the second time is 1 - 1.5 L / min, and the liquid pressure is 6 - 10 MPa.

[0052] In some embodiments, the wet wipe liquid of the water absorption layer 32 contains a surfactant with a concentration of 3 - 8 wt% and a penetration enhancer with a concentration of 2 - 5 wt%; the surfactant is one of sodium alkylbenzene sulfonate or fatty alcohol polyoxyethylene ether, and the penetration enhancer is one of glycerol or propylene glycol. Example 1

[0053] A spraying method for a wet wipe liquid spraying device in wet wipe production includes the following steps:

[0054] S1. Thread the side of the wet wipe substrate 3 to be sprayed through several feeding devices 4, and make the oil absorption layer 31 of the wet wipe substrate 3 face the spraying end of a group of spraying heads 21 located in the middle, and the water absorption layer 32 face the spraying ends of two groups of spraying heads 21 located on both sides;

[0055] S2. Through the control system, control several feeding devices 4 to realize the feeding of the wet wipe substrate 3 at a speed of 3 m / min, and at the same time control the liquid infusion assembly to transport the wet wipe liquid of the oil absorption layer 31 inside the oil absorption liquid tank 5 to a group of spraying heads 21 located in the middle, and transport the wet wipe liquid of the water absorption layer 32 inside the water absorption liquid tank 6 to two groups of spraying heads 21 located on both sides;

[0056] S3. Through the control system, according to the advancing direction of the wet wipe substrate 3, control a set of spraying heads 21 on one side to spray the water-absorbing layer 32 with wet wipe liquid at a liquid flow rate of 0.5 L / min and a liquid pressure of 8 MPa; control a set of spraying heads 21 in the middle to spray the oil-absorbing layer 31 with wet wipe liquid at a liquid flow rate of 1.8 L / min and a liquid pressure of 8 MPa; control a set of spraying heads 21 on the other side to spray the water-absorbing layer 32 with wet wipe liquid for the second time at a liquid flow rate of 1.3 L / min and a liquid pressure of 8 MPa, so as to achieve fully automatic and continuous spraying of wet wipe liquid.

[0057] The wet wipe liquid for the oil-absorbing layer 31 is prepared from the following raw materials by weight: 2 parts of methyl paraben, 4 parts of phenoxyethanol, 1 part of polysorbate 80, 5 parts of hexylene glycol, 2 parts of sodium lauroyl sarcosinate, 3 parts of propylene glycol, 2 parts of cocamidopropyl betaine, 20 parts of propylene glycol methyl ether and 30 parts of water.

[0058] Preparation steps: Weigh and stir the raw materials of the wet wipe liquid for the oil-absorbing layer 31 evenly to obtain the wet wipe liquid for the oil-absorbing layer 31.

[0059] The wet wipe liquid for the water-absorbing layer 32 is prepared from the following raw materials by weight: 30 parts of ectoine, 15 parts of chlorhexidine gluconate, 8 parts of acetylglutamine, 4 parts of rice germ extract, 3 parts of chamomile extract, 1.5 parts of natural spiraea extract, 5 parts of pH regulator and 40 parts of water.

[0060] Preparation steps: Weigh and stir the raw materials of the wet wipe liquid for the water-absorbing layer 32 evenly to obtain the wet wipe liquid for the water-absorbing layer 32.

[0061] Among them, the wet wipe liquid for the water-absorbing layer 32 contains sodium alkylbenzene sulfonate with a concentration of 5 wt% and propylene glycol with a concentration of 4 wt%. Example 2

[0062] This example is basically the same as Example 1, the difference is that in step S3: Through the control system, according to the advancing direction of the wet wipe substrate 3, control a set of spraying heads 21 on one side to spray the water-absorbing layer 32 with wet wipe liquid at a liquid flow rate of 0.4 L / min and a liquid pressure of 8 MPa for the first time; control a set of spraying heads 21 in the middle to spray the oil-absorbing layer 31 with wet wipe liquid at a liquid flow rate of 1.5 L / min and a liquid pressure of 8 MPa; control a set of spraying heads 21 on the other side to spray the water-absorbing layer 32 with wet wipe liquid for the second time at a liquid flow rate of 1.1 L / min and a liquid pressure of 8 MPa, so as to achieve fully automatic and continuous spraying of wet wipe liquid. Example 3

[0063] This embodiment is basically the same as Embodiment 1, except that in step S3: through the control system, according to the advancing direction of the wet wipe substrate 3, a set of spraying heads 21 on one side is controlled to spray the water-absorbing layer 32 with wet wipe liquid at a liquid flow rate of 0.8 L / min and a liquid pressure of 8 MPa; a set of spraying heads 21 in the middle is controlled to spray the oil-absorbing layer 31 with wet wipe liquid at a liquid flow rate of 2 L / min and a liquid pressure of 8 MPa; and a set of spraying heads 21 on the other side is controlled to spray the water-absorbing layer 32 with wet wipe liquid for the second time at a liquid flow rate of 1.5 L / min and a liquid pressure of 8 MPa, so as to achieve fully automatic and continuous spraying of wet wipe liquid. Embodiment 4

[0064] This embodiment is basically the same as Embodiment 1, except that the wet wipe liquid for the water-absorbing layer 32 contains sodium alkylbenzenesulfonate with a concentration of 3 wt%. Embodiment 5

[0065] This embodiment is basically the same as Embodiment 1, except that the wet wipe liquid for the water-absorbing layer 32 contains sodium alkylbenzenesulfonate with a concentration of 8 wt%. Embodiment 6

[0066] This embodiment is basically the same as Embodiment 1, except that the wet wipe liquid for the water-absorbing layer 32 contains propylene glycol with a concentration of 2 wt%. Embodiment 7

[0067] This embodiment is basically the same as Embodiment 1, except that the wet wipe liquid for the water-absorbing layer 32 contains propylene glycol with a concentration of 5 wt%.

[0068] Comparative Example 1

[0069] This comparative example is basically the same as Embodiment 1, except that in step S3: through the control system, according to the advancing direction of the wet wipe substrate 3, a set of spraying heads 21 in the middle is controlled to spray the oil-absorbing layer 31 with wet wipe liquid at a liquid flow rate of 1.8 L / min and a liquid pressure of 8 MPa; and a set of spraying heads 21 on one side of the middle is controlled to spray the water-absorbing layer 32 with wet wipe liquid at a liquid flow rate of 1.8 L / min and a liquid pressure of 8 MPa, so as to achieve fully automatic and continuous spraying of wet wipe liquid.

[0070] Comparative Example 2

[0071] This comparative example is basically the same as Example 1, except that in step S3: through the control system, according to the advancing direction of the wet wipe substrate 3, a set of spraying heads 21 on one side is controlled to spray the wet wipe liquid for the water-absorbing layer 32 at a liquid flow rate of 1.8 L / min and a liquid pressure of 8 MPa, and a set of spraying heads 21 in the middle is controlled to spray the wet wipe liquid for the oil-absorbing layer 31 at a liquid flow rate of 1.8 L / min and a liquid pressure of 8 MPa, so as to achieve fully automatic and continuous spraying of the wet wipe liquid.

[0072] Comparative Example 3

[0073] This comparative example is basically the same as Example 1, except that the wet wipe liquid for the water-absorbing layer 32 contains sodium alkylbenzene sulfonate with a concentration of 2 wt%.

[0074] Comparative Example 4

[0075] This comparative example is basically the same as Example 1, except that the wet wipe liquid for the water-absorbing layer 32 contains sodium alkylbenzene sulfonate with a concentration of 10 wt%.

[0076] Comparative Example 5

[0077] This comparative example is basically the same as Example 1, except that the wet wipe liquid for the water-absorbing layer 32 contains propylene glycol with a concentration of 1 wt%.

[0078] Comparative Example 6

[0079] This comparative example is basically the same as Example 1, except that the wet wipe liquid for the water-absorbing layer 32 contains propylene glycol with a concentration of 6 wt%.

[0080] Performance test: The wet wipes obtained by spraying the wet wipe liquid in Examples 1-7 and Comparative Examples 1-6 were cut into a specification of 10 cm * 10 cm. Referring to "GB / T27728-2011 Wet Wipes" respectively, the wet wipes after spraying the wet wipe liquid for the oil-absorbing layer 31 and the water-absorbing layer 32 were tested for the oil removal rate of artificial oil stains with the wet wipes after spraying the standard solution, and the average value was taken for three times. The performance test results are shown in Table 1.

[0081] Table 1: Oil removal rate test

[0082]

[0083] It can be seen from Table 1 that:

[0084] By comparing Examples 1-3 with Comparative Examples 1-2, it can be known that in the process of spraying the wet wipe liquid of the present invention, by first spraying a small amount of the wet wipe liquid for the water-absorbing layer 32 on the water-absorbing layer 32, then spraying the wet wipe liquid for the oil-absorbing layer 31 on the oil-absorbing layer 31, and finally spraying the wet wipe liquid for the water-absorbing layer 32 to supplement the water-absorbing layer 32;

[0085] On the one hand, when spraying the wet wipe liquid of the oil-absorbing layer 31, a small amount of the wet wipe liquid of the water-absorbing layer 32 has formed a liquid conduction path, providing a direct penetration path for the wet wipe liquid of the oil-absorbing layer 31, enabling it to penetrate into the water-absorbing layer 32 faster, reducing the residence time on the surface of the oil-absorbing layer 31, avoiding directly spraying a large amount of liquid on the oil-absorbing layer 31, which may cause excessive liquid accumulation on the surface, increasing the risk of evaporation or loss, and thus improving the wetting effect;

[0086] On the other hand, a small amount of the wet wipe liquid in the water-absorbing layer 32 can form a tiny liquid bridge connection between the water-absorbing layer 32 and the fibers of the oil-absorbing layer 31 to internally absorb the oil-absorbing layer 31. When spraying the wet wipe liquid of the oil-absorbing layer 31, it can enhance the penetration rate of the oil-absorbing layer 31, avoid forming a locally over-wet area on the surface of the oil-absorbing layer 31, ensure more uniform distribution of the liquid in the wet wipe substrate 3, prevent some areas from being over-wet or dry, ensure the consistency of the wetness, and thus improve the oil-removing effect of the wet wipe substrate 3.

[0087] It can be known from the comparison between Example 1 and Examples 4 - 7 that by adding appropriate contents of surfactants and penetration aids to the liquid in the water-absorbing layer 32, the surfactants can reduce the surface tension of the liquid, form a microemulsion structure, make the liquid easier to spread and penetrate into the material interior, help the wet wipe liquid of the oil-absorbing layer 31 penetrate faster, and then enhance the wettability of the oil-absorbing layer 31 material, promote the uniform distribution of the liquid. The penetration aids can form a bridge between the liquid and the material, help the liquid of the oil-absorbing layer 31 penetrate faster, not only maintain the softness and water absorption of the water-absorbing layer 32, but also act as a moisturizing component to prevent the hand skin from drying, thus further improving the oil-removing efficiency.

[0088] It can be known from the comparison between Example 1 and Comparative Example 3 and Comparative Example 4 that when the concentration of the surfactant is too low, the number of surfactant molecules in the solution is insufficient to form enough microemulsion structures and reduce the surface tension of the liquid, making it unable to spread and penetrate effectively. When the concentration of the surfactant is too high, the molecules aggregate excessively, forming larger micelles, reducing the effective dispersion and wetting ability, not only affecting the uniform distribution of the liquid, but also possibly causing local over-wet phenomena, thus weakening the oil-removing effect.

[0089] It can be known from the comparison between Example 1 and Comparative Example 5 and Comparative Example 6 that when the concentration of the penetration aid is too low, the "bridge" formed between the liquid and the material is not strong enough or the quantity is insufficient, unable to effectively help the liquid diffuse into the material interior, resulting in slow liquid penetration speed and uneven wetting. When the concentration of the penetration aid is too high, its molecules are likely to occupy the adsorption sites on the surface of the material fibers, hindering the effective contact between other components and the material, thus weakening the oil-removing effect.

[0090] Based on the above revelation of the ideal embodiments of the present invention, through the above description, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0091] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A wet wipe liquid spraying device for wet wipe production, characterized in that, Including: a bottom plate, a control system for realizing full-automatic wet wipe liquid spraying by using a controller, and a spraying mechanism installed on the top of the bottom plate for spraying wet wipe liquid onto a wet wipe substrate; the wet wipe substrate includes: an oil absorption layer and a water absorption layer arranged at the bottom of the oil absorption layer; several feeding devices for feeding the wet wipe substrate are installed on the top of the bottom plate on the side of the wet wipe substrate; the material of the oil absorption layer is one of polyester or nylon; the material of the water absorption layer is one of viscose fiber or cotton fiber; the spraying mechanism includes: three groups of spraying heads arranged on the top of the bottom plate, and several mounting plates arranged on one side of each group of spraying heads; supporting plates are fixed on the sides of several spraying heads in each group, and one side of the supporting plates is installed on one side of several mounting plates; the distribution mode of the three groups of spraying heads is: the spraying ends of the group of spraying heads located in the middle face the top of the oil absorption layer, and the spraying ends of the two groups of spraying heads located on both sides face the bottom of the water absorption layer; for the group of spraying heads facing the oil absorption layer, the liquid flow rate of the wet wipe liquid for spraying the oil absorption layer is 1.5 - 2 L / min, and the liquid pressure is 6 - 10 MPa; for the two groups of spraying heads facing the water absorption layer, the liquid flow rate of the wet wipe liquid for the first spraying of the water absorption layer is 0.4 - 0.8 L / min, and the liquid pressure is 6 - 10 MPa, and the liquid flow rate of the wet wipe liquid for the second spraying of the water absorption layer is 1 - 1.5 L / min, and the liquid pressure is 6 - 10 MPa; oil absorption liquid tanks for carrying the wet wipe liquid of the oil absorption layer and water absorption liquid tanks for carrying the wet wipe liquid of the water absorption layer are respectively arranged on both sides of the bottom plate, and liquid delivery assemblies for delivering the wet wipe liquid to the liquid inlet ends of the spraying heads are arranged on the sides of the oil absorption liquid tanks and the water absorption liquid tanks; 2. The wet wipe liquid spraying device for wet wipe production according to claim 1, wherein: several spraying heads in each group are evenly distributed in a linear array along the width direction of the wet wipe substrate; the bottom of the mounting plate is fixed to the top of the bottom plate, the spraying mechanism is located between several feeding devices, and the control system is electrically connected to the feeding devices and the spraying heads respectively; 3. The wet wipe liquid spraying device for wet wipe production according to claim 1, characterized in that: the liquid delivery assembly includes: several water pumps arranged on one side of the bottom plate, and liquid delivery pipes installed at the output ends of the water pumps; the sides of the liquid delivery pipes near one end are fixed to the liquid inlet ends of several spraying heads, and the water pumps are electrically connected to the control system; 4. The wet wipe liquid spraying device for wet wipe production according to claim 3, wherein: a group of water pumps is arranged on the side of the oil absorption liquid tank, and the input end is fixed to the side of the oil absorption liquid tank, and the liquid delivery pipe at the output end is connected to the group of spraying heads located in the middle; two groups of water pumps are arranged on the side of the water absorption liquid tank, and the input ends are both fixed to the side of the water absorption liquid tank, and the liquid delivery pipes at the output ends are respectively connected to the two groups of spraying heads located on both sides; 5. The wet wipe liquid spraying device for wet wipe production according to claim 1, characterized in that: A lifting component is arranged on the side of the mounting plate. The lifting component includes: a cylinder and a linear guide fixed on one side of the mounting plate, and a moving plate mounted on one side of the support plate; the output end of the cylinder is fixed to one side of the moving plate, the side of the moving plate is slidably connected to the side of the linear guide, and the cylinder is electrically connected to the control system.

6. The wet wipe liquid spraying device for wet wipe production according to claim 5, characterized in that: A limiting block is fixed on one side of the mounting plate, a limiting rod is fixed on one side of the limiting block, and one end of the limiting rod faces one side of the moving plate.

7. A spraying method for a wet wipe liquid spraying device for producing wet wipes according to any one of claims 1-6, characterized in that, It includes the following steps: S1. The side of the wet wipe substrate to be sprayed is threaded through a plurality of feeding devices, and the oil-absorbing layer of the wet wipe substrate faces the spraying end of a group of spraying heads located in the middle, and the water-absorbing layer faces the spraying ends of two groups of spraying heads located on both sides. S2. Through the control system, control a plurality of feeding devices to realize the feeding of the wet wipe substrate, and at the same time control the liquid infusion component to convey the oil-absorbing layer wet wipe liquid in the oil-absorbing liquid tank to a group of spraying heads located in the middle, and convey the water-absorbing layer wet wipe liquid in the water-absorbing liquid tank to two groups of spraying heads located on both sides. S3. Through the control system, according to the advancing direction of the wet wipe substrate, control a group of spraying heads on one side to spray the water-absorbing layer wet wipe liquid on the water-absorbing layer for the first time, a group of spraying heads in the middle to spray the oil-absorbing layer wet wipe liquid on the oil-absorbing layer, and a group of spraying heads on the other side to spray the water-absorbing layer wet wipe liquid on the water-absorbing layer for the second time, so as to realize fully automatic and continuous spraying of the wet wipe liquid.

8. The spraying method of the wet wipe liquid spraying device for wet wipe production according to claim 7, characterized in that: The water-absorbing layer wet wipe liquid contains a surfactant with a concentration of 3-8 wt% and a penetration enhancer with a concentration of 2-5 wt%; the surfactant is one of sodium alkylbenzene sulfonate or fatty alcohol polyoxyethylene ether, and the penetration enhancer is one of glycerol or propylene glycol.

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