Anti-fracture wet tissue based on spot-breaking continuous-drawing and tensile strengthening and preparation process of anti-fracture wet tissue

Abstract

The invention provides an anti-breakage wet tissue based on point breaking, continuous drawing and tensile strengthening and a preparation process thereof, and belongs to the technical field of hygienic products, the anti-breakage wet tissue comprises a plurality of wet tissues folded and stacked in the vertical direction, every two adjacent wet tissues are connected through a plurality of breaking points, and the breaking points and folding positions are staggered; the breakpoint is arranged on one side of the side edge of the wet tissue, so that when the wet tissue is extracted, one corner of the lower wet tissue is pulled to the opening of the packaging bag, and the lower wet tissue is wrinkled, so that the wet tissue can be extracted next time; the wet tissue is provided with six connecting breakpoints, so that the stress load of a single breakpoint can be reduced; by adopting the breakpoint design, the fracture success rate is increased to 98% or above, the tensile strength of the wet tissue in a wet state can be maintained to be larger than or equal to 2.5 N by improving the raw materials of the wet tissue, and the fracture resistance of the wet tissue is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitary products, and in particular to an anti-fracture wet tissue based on point-breaking continuous drawing and tensile reinforcement and a preparation process thereof. Background Art

[0002] With improving living standards, more and more consumers are purchasing and using wet wipes. Existing wet wipes are typically single-pull designs, meaning each wipe is individually drawn, requiring a fresh wipe to be removed from the package. This can lead to multiple wipes being drawn simultaneously, resulting in waste. Furthermore, multiple entry into the packaging during the draw process can contaminate the wet wipes.

[0003] Utility model patent application number 2023230303667 discloses a convenient paper towel for removal. This solution features a notch on one end of the paper towel and a protrusion on the corresponding end. The protrusion matches the shape of the notch, and the notch of the paper towel is connected to the protrusion of the adjacent paper towel via 1-5 connection points. By providing protrusions on the edge of the paper towel and connecting them to the notch of the adjacent paper towel, the protrusion on the next paper towel can be pulled out when the previous paper towel is pulled out, and the connection points can be easily disconnected without pulling out the next paper towel. At the same time, the protrusion changes its state and shape within the package due to being pulled up. Even if pressed down by the sealing cap at the opening of the package, it will not adhere to the upper surface of the paper towel. Therefore, the next paper towel can be easily grasped and removed conveniently the next time it is used. Furthermore, the width of the protrusion is small, which does not affect the use of the sealing cap, ensuring the sealing effect of the package.

[0004] However, the above-mentioned easy-to-draw tissue also has some problems. The breaking point of the tissue is located in the middle of the side of the tissue, and the grabbing point is in the middle of the side of the tissue, which makes it relatively inconvenient to grab. When the tissue is pulled out, the lower side of the tissue is pulled to the opening of the packaging bag, and the wrinkles of the tissue are relatively few. When the lid of the packaging box is closed, the side of the tissue is easily re-attached to the lower tissue due to factors such as gravity or external squeezing, which makes it still troublesome to pull it out again.

[0005] Secondly, the connecting force between the two tissues (i.e., the force required to disconnect the two tissues) is difficult to control. If the connecting force is too strong, one side of the tissue can be completely pulled out during extraction. In this case, the tissue will need to be re-stuck, which can easily cause contamination. If the connecting force is too weak, the tissues can easily disconnect prematurely, and the side of the tissue will not reach the opening of the packaging bag, making it inconvenient to remove the tissue later. Summary of the Invention

[0006] The present invention provides a breakage-resistant wet tissue based on point-break continuous drawing and tensile reinforcement and a preparation process thereof, so as to solve the technical problems in the prior art.

[0007] To solve the above problems, the anti-fracture wet wipes based on point-breaking continuous extraction and tensile strengthening provided by the present invention adopt the following technical solutions: including a plurality of wet wipes folded and stacked in the up-and-down direction, and a plurality of break points are used to connect between adjacent two wet wipes, and the break points are staggered with the folding positions;

[0008] The break points are arranged on one side of the side of the wet wipe, so that when extracting the wet wipe, one corner of the lower wet wipe is pulled to the opening of the packaging bag, and the lower wet wipe is wrinkled to facilitate the next extraction of the wet wipe.

[0009] As a further improvement, there are 6 break points, and the distance from the first break point to the edge of the wet wipe is 2-12 mm; the ratio of the width of each break point to the side length of the side connected by the break point is 1:150, and the ratio of the distance between adjacent two break points to the side length of the side connected by the break point is 1:30.

[0010] As a further improvement, the wet wipe adopts a dispersible spunlace non-woven fabric, and the fiber length of the dispersible spunlace non-woven fabric is 2-12 mm.

[0011] As a further improvement, the tensile strength of the wet wipe in the wet state is 2.5-3 N, so that after the wet wipe is extracted, the area of the lower wet wipe corner being pulled out and leaking accounts for 7% of the area of the whole wet wipe.

[0012] The present invention also provides a preparation process for the anti-fracture wet wipes based on point-breaking continuous extraction and tensile strengthening, including the following steps:

[0013] S1. Point-breaking cutting, the tissue cutting knife and the break point cutting knife cooperate to cut the non-woven fabric and form a number of break points for connecting the non-woven fabric;

[0014] S2. Non-woven fabric folding, the tissue cutting knife and the tissue folding knife cooperate to make the non-woven fabric form creases for stacking;

[0015] S3. Non-woven fabric stacking, separating the indented non-woven fabric from the tissue cutting knife through a dial, so that the non-woven fabric falls onto the lower baffle;

[0016] S4. Blank feeding, when the number of stacked non-woven fabric sheets reaches the set parameters, transfer the stacked non-woven fabric to the conveyor belt;

[0017] S5. Adding liquid to the non-woven fabric;

[0018] S6. Packaging.

[0019] As a further improvement, the break point cutting knife is provided with 6 grooves with a width of 2 mm, and the paper towel cutting knife is provided with three concave structures and three convex structures, and the concave structures and the convex structures are arranged alternately; when the paper towel cutting knife rotates to make the convex structure contact the break point cutting knife, the non-woven fabric is cut and 6 break points of 2 mm are formed;

[0020] As a further improvement, the structure of the paper towel folding knife is the same as that of the paper towel cutting knife, and the paper towel folding knife and the paper towel cutting knife cooperate with each other, so that when the paper towel folding knife and the paper towel cutting knife rotate towards each other, a crease is formed at the intersection of the concave structure and the convex structure of the non-woven fabric.

[0021] As a further improvement, the non-woven fabric is a water-dispersible spunlace non-woven fabric, the fiber length of the water-dispersible spunlace non-woven fabric is 2-12 mm, the water-dispersible spunlace non-woven fabric includes viscose / lyocell fibers and wood pulp fibers, and the viscose / lyocell fibers are entangled with the wood pulp fibers through a spunlace process.

[0022] As a further improvement, the ratio of the viscose / lyocell fibers to the wood pulp fibers is at least 7:3.

[0023] As a further improvement, the viscose / lyocell fibers and the wood pulp fibers are entangled by high-pressure water jets, and the water pressure of the high-pressure water jet process is at least 80 Pa.

[0024] The beneficial effects of the above technical solutions of the present invention are as follows:

[0025] 1. The wet wipes of the present invention are provided with six connection break points, which can reduce the stress load of a single break point. The balanced design of the number and spacing of the break points can not only ensure single-sheet separation during extraction, but also prevent the corners (folds) of the wet wipes from protruding too much from the opening of the packaging bag due to too many break points, affecting the sealing. Pushing the corners back by hand may also contaminate the wet wipes.

[0026] By adopting this break point design, the break success rate is increased to more than 98%. This break point spacing ratio enables the break point to break first while maintaining the overall structural stability.

[0027] The improvement of the break point position makes the movement, end resistance and fold angle of the wet wipes very stable during extraction, ensuring that the wet wipes are not easily broken during extraction. At the same time, the phenomenon of multiple wet wipes being extracted simultaneously is avoided, reducing waste and preventing the reinsertion of the extra-extracted wipes, causing paper towel contamination and ensuring the hygienic quality of the product.

[0028] 2. By improving the raw materials of the wet wipes, the anti - fracture ability of the wet wipes is enhanced. First, by adjusting the fiber length of the flushable spunlace non - woven fabric, its longitudinal tensile strength is increased. Second, by adjusting the ratio of viscose / lyocell fiber to wood pulp fiber, the tensile strength of the flushable spunlace non - woven fabric after wetting is improved, and by adjusting the water pressure of the high - pressure spunlace, the viscose / lyocell fiber and the wood pulp fiber are deeply entangled and still maintain a mechanical interlocking structure after wetting. Ensure that the tensile strength of the optimized wet wipes in the wet state can be maintained at ≥2.5 N, still higher than the break - point separation force (1.5 - 2.5 N).

[0029] 3. The break - point cutting knife, tissue cutting knife and tissue folding knife of the preparation process of the present invention cooperate with each other, and can quickly complete actions such as cutting and creasing of the non - woven fabric. Through the cooperation of the dial and the baffle, the stacking accuracy and stability are significantly improved, ensuring the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] By reading the following detailed description with reference to the accompanying drawings, the above - mentioned and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the drawings, several embodiments of the present invention are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0031] Figure 1 It is a schematic structural diagram of the point - break folding of the anti - fracture wet wipes and its preparation process based on point - break continuous extraction and tensile strength enhancement of the present invention;

[0032] Figure 2 It is a schematic structural diagram of the dial and the baffle of the anti - fracture wet wipes and its preparation process based on point - break continuous extraction and tensile strength enhancement of the present invention;

[0033] Figure 3 It is a schematic structural diagram of the point - break structure of the wet wipes of the anti - fracture wet wipes and its preparation process based on point - break continuous extraction and tensile strength enhancement of the present invention;

[0034] Figure 4 It is a process flow chart of the folding process of the anti - fracture wet wipes and its preparation process based on point - break continuous extraction and tensile strength enhancement of the present invention;

[0035] Figure 5 It is a reference diagram of the stretching direction of the anti - fracture wet wipes and its preparation process based on point - break continuous extraction and tensile strength enhancement of the present invention;

[0036] Figure 6 It is a reference diagram of the extraction of the wet wipes of the anti - fracture wet wipes and its preparation process based on point - break continuous extraction and tensile strength enhancement of the present invention;

[0037] Figure 7 It is a reference diagram of the production process of the anti - fracture wet wipes and its preparation process based on point - break continuous extraction and tensile strength enhancement of the present invention.

[0038] Explanation of Reference Numerals

[0039] 1. Paper towel cutting knife; 2. Paper towel folding knife; 3. Paddle; 5. Protruding structure; 6. Groove structure; 7. Breakpoint cutting knife; 81. First baffle; 82. Second baffle; 83. Third baffle. Detailed Implementation Manner

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] In the prior art, most wet wipes are single-ply. Such single-ply wet wipes have two obvious disadvantages. One is that it is easy to pull out two or three sheets at a time. The extra wet wipes pulled out are either directly thrown away or simply used and then thrown away, which is likely to cause waste; or the extra wet wipes are stuffed back, which is likely to cause hygiene problems. The second is that the extraction is rather troublesome. One needs to put one's hand into the packaging bag to extract the wet wipes, which is not only inconvenient but also likely to contaminate the paper towels.

[0042] In view of the disadvantages of the existing single-ply wet wipes, some manufacturers have successively launched multi-ply wet wipes. Although to a certain extent, the above problems are alleviated, some problems have also been found during the testing process. During the extraction of wet wipes, the situation where the wet wipes break prematurely may occur, that is, before the edge of the lower wet wipe reaches the opening of the packaging bag, the upper wet wipe and the lower wet wipe break prematurely, resulting in the need to reach into the packaging bag to grab and extract the wet wipes during subsequent use.

[0043] Regarding the above problems, the present invention significantly reduces the probability of the above situation from aspects such as the material, structure, and preparation process of the wet wipes.

[0044] First, in terms of raw materials, the wet wipes of the present invention use dispersible spunlace non-woven fabric. The length of the wood pulp fibers is 2 - 3.5 mm, and the length of the viscose fiber / lyocell fiber is 8 - 12 mm. Through the spunlace process, the fibers are bonded together to enhance the network structure and improve its longitudinal tensile strength. Among them, the dry dispersible spunlace non-woven fabric wood pulp fibers form a hydrogen bond network through hydroxyl groups (-OH), and the bonding strength is about 2 - 4 N / mm 2 , and the viscose / lyocell fibers are entangled with the wood pulp fibers through the spunlace process, and the bonding strength can reach 3 - 5 N / mm 2, the tensile strength of the dry material should be ≥ 3.9 N (measured value) to ensure no breakage during extraction; in addition, after adding liquid (such as moisture or moisturizer), the cellulose fibers absorb water and swell, and some hydrogen bonds are broken, which may lead to a decrease in strength, making it easy for the wet wipes to break prematurely during extraction.

[0045] Therefore, we improved the problem of the strength decline of wet wipes after wetting from two aspects. ① Increase the ratio of viscose / lyocell fiber to wood pulp fiber. When the ratio of viscose / lyocell fiber to wood pulp fiber is 7:3 or more, the crystallinity of viscose / lyocell fiber is higher than that of wood pulp, and the strength retention rate after wetting is higher. ② Through high-pressure hydroentangling (the minimum water pressure is not less than 80 Pa), the fibers are deeply entangled and still maintain a mechanical interlocking structure after wetting. The optimized flushable hydroentangled non-woven fabric can maintain a tensile strength of ≥ 2.5 N (measured value) in the wet state, still higher than the breakpoint separation force (1.5 - 2.5 N), ensuring that the wet wipes are not easily disconnected prematurely.

[0046] Second, in terms of structure, the structure includes the wet wipe stacking structure and the breakpoint setting position.

[0047] 1. Wet wipe stacking structure and packaging bag design.

[0048] (1) The wet wipes are stacked in the up and down direction, and the breakpoints of the wet wipes are staggered with the folding positions to avoid multiple sheets being stressed simultaneously.

[0049] (2) When extracting the wet wipes, the extraction paths of each wet wipe are basically the same, ensuring that parameters such as the force during extraction and the leakage area after disconnection of each tissue are highly consistent, reducing the uneven pulling caused by the lateral offset of the wet wipes.

[0050] (3) Taking A as the extraction point, during normal extraction, the extraction path, extraction force (1.0 - 2.0 N), and extraction speed (0.3 - 1.5 m / s) of the tissue are more stable. At this time, the single-sheet extraction success rate is the highest (the continuous extraction rate ≤ 2%), and the material is not damaged, while reducing the breakage caused by the user's rapid pulling.

[0051] (4) When pulling, the exposed size of the fold angle is 25 - 30° (the larger the fold angle, the more concentrated the force on the exposed part of the second wet wipe, and it is easy to be pulled out together; the smaller the fold angle, the greater the grasping resistance), and the exposed area accounts for 7% of the area of the whole wet wipe, which is convenient for the next extraction.

[0052] (5) The position where the wet tissue breaks after extraction is at the lower left of the tissue extraction opening. The point-break structure of the tissue uses an asymmetric design. The break point E at the lower left is closer to the edge (20±5mm), and the ratio of the break point spacing (EF:KL = 1:150) forms a stress concentration area in this area. When folded and stacked, the lower left folding mark coincides with the break point, exacerbating local stress concentration. In addition, the protrusions and depressions of the tissue cutting knife and the break point cutting knife at the lower left meet here, forming a weak connection (2mm break point) and preferentially breaking.

[0053] 2. Position of break point setting.

[0054] Two adjacent wet tissues are connected by six break points. Using six break points instead of a single point or a small number of break points can reduce the stress load on a single break point. The balanced design of the number and spacing of break points can not only ensure single-sheet separation during extraction but also avoid increased material fragility due to excessive break points.

[0055] The first break point E is 20±5mm away from the edge of the wet tissue, ensuring that the initial fracture position is controllable; adjacent wet tissues are connected by six break points, and the break point spacing is designed according to a specific ratio (EF:KL = 1:150, FG:KL = 1:30, EJ:KL = 31:150, JL:KL = 33:50, EF:GH = 1:1, FG:HI = 1:1), ensuring that the break points evenly bear the tensile force during extraction and avoiding random fracture caused by local stress concentration. The break point spacing ratio simulates the extraction process through a tensile testing machine, comparing the fracture positions and required tensile forces under different break point ratios. Experiments show that for break points designed according to the ratio of EF:KL = 1:150, the fracture success rate is increased to over 98%. This break point spacing ratio makes the break points preferentially break while maintaining the overall structural stability.

[0056] III. In terms of preparation process

[0057] The break point cutting knife, the tissue cutting knife, and the tissue folding knife cooperate with each other to quickly complete actions such as cutting and creasing of the non-woven fabric. The tissue cutting knife can stack 3 wet tissues in one rotation. The space between the dial and the baffle can accommodate 60 - 100 sheets. When the stacked number of sheets is equal to the set sheet number parameter, the wet tissues are transferred downward to the conveyor belt. At this time, the minimum force value applied to the wet tissues is 3.9N, and the minimum force value of the end resistance is 1.2N. Multiple actual measurements show that at this time, the end resistance should be controlled at 1.2 - 1.8N and the grasping shaft speed at 0.8m / s.

[0058] Through the cooperation of the dial and the baffle, the stacking accuracy and stability are significantly improved, ensuring the production efficiency.

[0059] After introducing the basic principle of the present invention, various non-limiting embodiments of the present invention will be specifically introduced below. Any number of elements in the drawings is for illustration rather than limitation, and any naming is only for distinction without any limiting meaning.

[0060] Next, with reference to several representative embodiments of the present invention, the principles and spirit of the present invention will be elaborated in detail.

[0061] Example 1 of the anti-fracture wet tissue based on point-break continuous extraction and tensile strengthening provided in this embodiment:

[0062] As Figures 3 - 6 shown, the anti-fracture wet tissue based on point-break continuous extraction and tensile strengthening includes a plurality of wet tissues folded and stacked in the up-down direction. Adjacent two wet tissues are connected by 6 break points, and the break points are staggered with the folding positions.

[0063] The break points adopt an asymmetric design and are set on one side of the side of the wet tissue, so that when extracting the wet tissue, one corner of the lower wet tissue is pulled to the opening of the packaging bag, and wrinkles are generated on the lower wet tissue for the next extraction of the wet tissue.

[0064] As Figure 3 shown, the distance from the first break point to the edge of the wet tissue is 20 mm to ensure that the initial fracture position is controllable; adjacent wet tissues are connected by six break points, the width of the break points is 2 mm, and the break point spacing is designed according to a specific ratio (EF:KL = 1:150, FG:KL = 1:30, EJ:KL = 31:150, JL:KL = 33:50, EF:GH = 1:1, FG:HI = 1:1), ensuring that the break points evenly bear the tensile force during extraction and avoiding random fracture caused by local stress concentration. The break point spacing ratio is simulated by a tensile testing machine during the extraction process, and the fracture positions and required tensile forces under different break point ratios are compared. Experiments show that for the break points designed according to the ratio of EF:KL = 1:150, the fracture success rate is increased to more than 98%. This break point spacing ratio makes the break points fracture preferentially while maintaining the overall structural stability; the ratio of the width of each break point to the side length of the side where the break point is connected is 1:150, and the ratio of the distance between adjacent two break points to the side length of the side where the break point is connected is 1:30.

[0065] The wet tissue uses flushable spunlace non-woven fabric, and the fiber length of the flushable spunlace non-woven fabric is 2 - 12 mm, enhancing the network structure and improving its longitudinal tensile strength.

[0066] The tensile strength of the wet tissue in the wet state is 2.5 - 3 N, so that after the wet tissue is extracted, the area of the lower wet tissue corner being pulled out and leaking accounts for 7% of the area of the whole wet tissue.

[0067] In addition, in this embodiment, a guide groove is provided in the packaging bag to force the wet tissue to move along a unidirectional extraction path, thereby reducing uneven pulling caused by lateral deviation.

[0068] Wet wipes are arranged in a "folded stack" (e.g. Figure 4 ), A and C, B and D overlap and align with each other, with a deviation of ±5mm. The guide groove in the packaging bag forces the wet tissue to move in a one-way extraction path to reduce uneven pulling caused by lateral deviation. ② The wet tissue is extracted by pulling force M, controlling the extraction force (1.0-2.0N) and the natural extraction speed of 0.3-1.5m / s to prevent the user from breaking it due to sudden pulling. ③ The exposed angle is 25-30° (the larger the angle, the more concentrated the force on the exposed part of the second wet tissue, making it easier to be pulled out; the smaller the angle, the greater the gripping resistance). The exposed area accounts for 7% of the entire wet tissue area, making it easier to extract it next time. ④ The location where the wet wipe breaks after being pulled out is at the lower left of the paper withdrawal port. The point-breaking structure of the paper towel usually adopts an asymmetric design. The lower left breakpoint E is close to the edge (20±5mm), and the breakpoint spacing ratio (EF:KL=1:150) forms a stress concentration area in this area. When folded in half and stacked, the fold mark on the lower left coincides with the breakpoint, exacerbating the local stress concentration.

[0069] like Figure 1 and Figure 2 As shown, this embodiment also discloses a preparation process of anti-fracture wet wipes based on point-breaking continuous drawing and tensile strengthening, comprising the following steps:

[0070] S1, point cutting, the paper towel cutting knife 1 cooperates with the breakpoint cutting knife 7 to cut the non-woven fabric and form a number of breakpoints for connecting the non-woven fabric;

[0071] The breakpoint cutter 7 is installed at the top of the machine, mating with the tissue cutter 1 below. Six 2mm-wide indentations are designed on the surface of the breakpoint cutter 7 to create breakpoint connections in the nonwoven fabric. Its installation position must ensure precise alignment with the cutter to achieve accurate breakpoint cutting.

[0072] The tissue cutter 1 is located below the breakpoint cutter 7 and moves in the opposite direction. The cutter's surface is designed with raised and recessed structures 5, which cooperate with the folding blade to fold the nonwoven fabric. Its installation position ensures coordinated movement with the folding blade, paddle 3, and baffle 8.

[0073] In this embodiment, the wet wipes of the present invention use a flushable spunlace nonwoven fabric, the wood pulp fiber length is 2-3.5 mm, the viscose fiber / lyocell fiber length is 8-12 mm, the viscose / lyocell fiber is entangled with the wood pulp fiber through a spunlace process, and the ratio of viscose / lyocell fiber to wood pulp fiber is 7:3, and the bonding strength can reach 3-5 N / mm 2, the tensile strength of the dry material should be ≥ 3.9 N (measured value). The crystallinity of viscose / lyocell fiber is higher than that of wood pulp, and the strength retention rate after wetting is higher. Viscose / lyocell fiber and wood pulp fiber are deeply entangled through high-pressure hydroentangling (water pressure is 80 Pa), and the mechanical interlocking structure is still maintained after wetting. The optimized flushable hydroentangled nonwoven fabric can maintain a tensile strength of ≥ 2.5 N (measured value) in the wet state, which is still higher than the breaking point separation force (1.5 - 2.5 N), ensuring that the wet wipes are not easily disconnected in advance.

[0074] S2. The nonwoven fabric is folded, and the tissue cutting knife 1 cooperates with the tissue folding knife 2 to form creases on the nonwoven fabric for stacking;

[0075] The tissue folding knife 2 moves towards the tissue cutting knife 1 to jointly fold the nonwoven fabric. The mutual cooperation between the tissue folding knife 2 and the tissue cutting knife 1 forms creases on the wet wipes. Its installation position needs to ensure precise alignment with components such as the cutting knife, the paddle 3, and the baffle 8.

[0076] S3. The nonwoven fabrics are stacked, and the paddle 3 separates the indented nonwoven fabric from the tissue cutting knife 1, causing the nonwoven fabric to fall onto the lower baffle 8;

[0077] As Figure 1 、 Figure 2 and Figure 7 shown, there are two paddles 3, which are respectively located below the tissue cutting knife 1 and the tissue folding knife 2. The paddle 3 has two functions. One is to separate the indented nonwoven fabric from the tissue cutting knife 1 or the tissue folding knife 2, causing the indented nonwoven fabric to fall on the baffle 8; the other is to play a guiding or orienting role, enabling the indented nonwoven fabric to be stacked stably on the baffle 8.

[0078] The paddle 3 is composed of several spaced-apart paddle rods, and the tissue cutting knife 1 and the tissue folding knife 2 are both provided with avoidance grooves for avoiding the paddle 3. When the paddle 3 reciprocates, the paddle 3 extends out of the avoidance groove, separating the nonwoven fabric from the tissue cutting knife 1 or the tissue folding knife 2, and pressing the nonwoven fabric downward to stack it stably on the baffle 8.

[0079] There are three baffles 8, two on one side and one on the other side. The baffle 8 is composed of several spaced-apart baffle rods, enabling it to pass through the baffle 8 or the paddle 3.

[0080] For convenience of description, three baffles 8 are defined as the first baffle 81, the second baffle 82 and the third baffle 83 respectively. In the initial state, the first baffle 81 is used for receiving materials. When the received materials reach the set value, the second baffle 82 moves upward, passes through the first baffle 81, and replaces the first baffle 81 to receive materials. After that, the first baffle 81 moves laterally, bypasses the non-woven fabric and then moves upward. At the same time, the third baffle 83 also moves upward. After moving to the set position, wait for the non-woven fabric to be stacked to the set quantity. The first baffle 81 and the third baffle 83 move closer to the middle in turn. The first baffle 81 receives materials again. The second baffle 82 and the third baffle 83 fix the stacked non-woven fabric. When the non-woven fabric on the first baffle 81 is stacked to the set quantity, the second baffle 82 and the third baffle 83 move downward to disconnect the non-woven fabric between the second baffle 82 and the third baffle 83 from the non-woven fabric on the first baffle 81. Finally, the separated and stacked non-woven fabric is conveyed to the lower conveyor belt, and the second baffle 82 and the third baffle 83 are reset, repeating the above actions.

[0081] S4. Discharging. When the number of stacked non-woven fabric sheets reaches the set parameters, transfer the stacked non-woven fabric to the conveyor belt;

[0082] It is located at the end of the machine and is used to transfer the processed wet wipes to the subsequent packaging process. The conveyor belt is usually designed to move continuously to ensure the continuous and stable output of wet wipes. Its installation position needs to ensure the coordinated movement with components such as the fabric placing rack, the break point cutting knife 7, the cutting knife, the folding knife, the paddle 3 and the baffle 8.

[0083] S5. Adding liquid to the non-woven fabric;

[0084] S6. Packaging.

[0085] In this embodiment, no improvements are made to the steps of adding liquid to the non-woven fabric and packaging, so steps S5 and S6 will not be elaborated further.

[0086] Although this specification has shown and described multiple embodiments of the present invention, it is obvious to those skilled in the art that such embodiments are provided only by way of example. Those skilled in the art will think of many changes, alterations and alternative ways without departing from the spirit and idea of the present invention. It should be understood that various alternative solutions of the embodiments of the present invention described herein can be adopted in the process of practicing the present invention. The appended claims are intended to define the protection scope of the present invention and thus cover the module compositions, equivalents or alternative solutions within the protection scope of these claims.

Claims

1. A fracture-proof wet tissue based on point-breaking continuous extraction and tensile strengthening, characterized in that, It includes a number of wet wipes folded and stacked in the up-and-down direction. Adjacent wet wipes are connected by a number of break points, and the break points are staggered with the folding positions. The break points are set on one side of the side edge of the wet wipe. When extracting the wet wipe, one corner of the lower wet wipe is pulled to the opening of the packaging bag, and wrinkles are generated on the lower wet wipe for the next extraction of the wet wipe.

2. The anti-fracture wet tissue based on point-break continuous drawing and tensile strengthening according to claim 1, wherein: There are 6 break points. The distance from the first break point to the edge of the wet wipe is 2 - 12 mm. The ratio of the width of each break point to the side length of the side where the break point is connected is 1:150, and the ratio of the distance between adjacent break points to the side length of the side where the break point is connected is 1:

30.

3. The anti-fracture wet tissue based on point-break continuous extraction and tensile strength enhancement according to claim 1, characterized in that: The wet wipe is made of flushable spunlace non-woven fabric, and the fiber length of the flushable spunlace non-woven fabric is 2 - 12 mm.

4. The anti-fracture wet tissue based on point-breaking continuous drawing and tensile strengthening according to claim 3, wherein: The tensile strength of the wet wipe in the wet state is 2.5 - 3 N, so that after the wet wipe is extracted, the area of the corner of the lower wet wipe being pulled out and leaking accounts for 7% of the area of the whole wet wipe.

5. A preparation process of an anti-fracture wet tissue based on point-breaking continuous extraction and tensile strengthening, characterized in that, It includes the following steps: S1. Point-breaking cutting. The tissue cutting knife (1) cooperates with the break point cutting knife (7) to cut the non-woven fabric and form a number of break points for connecting the non-woven fabric. S2. Non-woven fabric folding. The tissue cutting knife (1) cooperates with the tissue folding knife (2) to make the non-woven fabric form creases for stacking. S3. Non-woven fabric stacking. The indented non-woven fabric is separated from the tissue cutting knife (1) by the pusher (3), and the non-woven fabric falls onto the lower baffle (8). S4. Blank feeding. When the number of stacked non-woven fabric sheets reaches the set parameters, the stacked non-woven fabric is transported to the conveyor belt. S5. Adding liquid to the non-woven fabric; S6. Packaging.

6. The preparation process of the anti-fracture wet tissue based on point-breaking continuous drawing and tensile strengthening according to claim 5, characterized in that: The break point cutting knife (7) is provided with 6 grooves with a width of 2 mm. The tissue cutting knife (1) is provided with three recessed structures and three protruding structures (5), and the recessed structures and the protruding structures (5) are staggered. When the tissue cutting knife (1) rotates to make the protruding structure (5) contact the break point cutting knife (7), the non-woven fabric is cut and 6 break points of 2 mm are formed.

7. The preparation process of the anti-fracture wet tissue based on point-breaking continuous drawing and tensile strengthening according to claim 6, characterized in that: The structure of the tissue folding knife (2) is the same as that of the tissue cutting knife (1). The tissue folding knife (2) and the tissue cutting knife (1) cooperate with each other, so that when the tissue folding knife (2) and the tissue cutting knife (1) rotate towards each other, creases are formed at the intersection of the recessed structure and the protruding structure (5) of the non-woven fabric.

8. The preparation process of the anti-fracture wet tissue based on point-breaking continuous drawing and tensile strengthening according to claim 5, characterized in that: The non-woven fabric is flushable spunlace non-woven fabric, the fiber length of the flushable spunlace non-woven fabric is 2 - 12 mm, and the flushable spunlace non-woven fabric includes viscose / lyocell fiber and wood pulp fiber, and the viscose / lyocell fiber is entangled with the wood pulp fiber through a spunlace process.

9. The preparation process of the anti-fracture wet tissue based on point-breaking continuous extraction and tensile strengthening according to claim 8, characterized in that: The ratio of the viscose / lyocell fiber to the wood pulp fiber is at least 7:

3.

10. The preparation process of the anti-fracture wet tissue based on point-breaking continuous extraction and tensile strength enhancement according to claim 8 or 9, characterized in that: The viscose / lyocell fiber and the wood pulp fiber are entangled by high-pressure spunlace, and the water pressure of the high-pressure spunlace process is at least 80 Pa.

Images