A wet wipe packaging bag and a forming process thereof

Abstract

The present application relates to the technical field of packaging bags, and particularly relates to a wet tissue packaging bag and a forming process thereof, which comprises a bag body, an opening, a sticky tape arranged on the opening, and a cover mechanism for covering the position of the sticky tape, one side of the sticky tape is provided with a tearing part which is not attached to the bag body, two transversely arranged reserved cutting edges are arranged on the sticky tape close to the tearing part, the sticky tape comprises multiple pe layers and multiple pp layers, and at least two pp layers are arranged between the pe layers, the material has good tearability, and the reserved cutting edge at the front end can be continuously and smoothly torn only by being opened, a continuous point-breaking tear line is not needed, the opening experience of consumers is effectively improved, the cover mechanism is prevented from pressing the reserved cutting edge, the sealing property of the wet tissue during logistics transportation is improved, the tearability of the sticky tape is improved, the existing technical problem that the tear line is close to the edge of the hollowed-out box cover and the box cover often presses the opening sticky tape tear line, resulting in poor use experience of consumers, is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of packaging bags, in particular to a wet wipe packaging bag and a forming process thereof. BACKGROUND

[0002] At present, Chinese patent application No. CN201820544601.2 discloses a wet paper towel packaging body, which comprises a first packaging body, one side of the first packaging body is provided with a cutout, the cutout is covered with a first structure for opening or sealing the cutout, and a plurality of second packaging bodies are stacked in the first packaging body, and the second packaging bodies are used for sealing and containing wet paper towels, and a general structure of a packaging bag is disclosed;

[0003] In order to facilitate consumers to extract and use, an opening and extraction port is opened on the film (packaging bag), and a reusable opening adhesive tape is attached, so as to ensure the hygiene of the opened wet wipes. The material of the conventional wet wipe opening adhesive tape is pp composite paper, and the adhesive surface is coated with a removable adhesive. The thickness of the material is 12-15 silk. In order to prevent the wet wipe product from leaking during transportation and handling, the peeling force of the adhesive tape is required to be high, which is generally designed to be 700-900 gf (standard steel plate). Sometimes it is difficult to tear when the consumer opens it for the first time. In order to facilitate the tearing of the adhesive tape, a virtual cutting line is made on both sides of the adhesive tape close to the box cover. For reference, Chinese patent application No. CN201621176404.7 discloses a novel leakage-proof wet wipe box, which discloses that the virtual tearing is performed through two virtual cutting lines.

[0004] However, in order to prevent the wet wipe liquid from leaking from the virtual tearing line, the virtual tearing line is required to be away from the edge of the opening by more than 5 mm, which causes the virtual tearing line to be close to the edge of the box cover. Due to the precision problem of the cover attaching machine, the box cover often presses the virtual tearing line of the opening adhesive tape, which causes poor user experience of the consumer. SUMMARY

[0005] Therefore, in view of the above problems, the present application provides a wet wipe packaging bag and a forming process thereof, which solves the technical problem that the virtual tearing line is close to the edge of the box cover, and the box cover often presses the virtual tearing line of the opening adhesive tape, which causes poor user experience of the consumer.

[0006] In order to achieve the above purpose, the following technical scheme is adopted in the present application: a wet wipe packaging bag, comprising a bag body, an opening provided on the top surface of the bag body, an adhesive tape attached to the opening, and a cover mechanism for covering the position of the adhesive tape, one side of the adhesive tape is provided with a tearing part which is not attached to the bag body, and two horizontal reserved cutting edges are provided on the side of the adhesive tape close to the tearing part;

[0007] The adhesive tape comprises a plurality of pe layers and a plurality of pp layers, and at least two of the pp layers are arranged between the pe layers.

[0008] Further, the reserved cutting length is 1mm-10mm.

[0009] A forming process of a wet tissue packaging bag based on the same inventive concept, comprising the following steps:

[0010] In the first step, the multi-layer pe layer and the multi-layer pp layer are co-extruded by an extruder to obtain a co-extruded film, one side of the co-extruded film is then coated with glue and pasted with a base paper, and the co-extruded film is then spaced apart according to the length of the cover mechanism to form a reserved cutting edge, thereby obtaining a glue paste.

[0011] In the second step, a film is inputted and an opening is formed on the film.

[0012] In the third step, the glue paste is inputted, flattened by a silica gel guide wheel, and compounded at the opening position of the film, and the base paper is recycled by an output roller.

[0013] In the fourth step, the film is cut and formed into a small bag, which is then outputted.

[0014] In the fifth step, the cover mechanism is inputted, transferred to the glue paste position of the small bag, and outputted.

[0015] Further, in the first step, the third layer and the fifth layer of the pp layer, and the first layer, the second layer, the fourth layer, the sixth layer and the seventh layer of the pe layer are co-extruded to obtain a co-extruded film.

[0016] Further, the thickness of the pp layer is 100-200μ, and the thickness of the pe layer is 100-200μ.

[0017] Further, the peeling force of the glue paste is 500-600gf.

[0018] Further, the reserved cutting length is 1-10mm.

[0019] By adopting the foregoing technical solution, the present application has the following advantages:

[0020] The wet tissue packaging bag is pasted by a pe layer and a pp layer through a multi-layer blending co-extrusion process, the material has good tearability, and only the reserved cutting edge at the front end needs to be opened to continuously and evenly tear, without the need for a continuous point-breaking tear line, thereby effectively improving the opening and use experience of consumers, the material has a relatively large improvement in softness compared with the conventional pp glue paper, has good adhesion to the wet tissue packaging material, and thus the peeling force of the glue paste is adjusted to 500-600gf to meet the liquid leakage prevention requirement of the wet tissue, the material has good tearability, and only the cutting edge at the front end needs to be opened to continuously and evenly tear, without the need for a continuous point-breaking tear line, thereby effectively improving the opening and use experience of consumers, the glue paste near the tearing part has a reserved cutting edge, and tearing backward along the tearing part can continuously and evenly tear.

[0021] The forming process of the wet wipe packaging bag avoids the cover closing mechanism from pressing the reserved cutting edge, improves the sealing performance of the wet wipe during logistics transportation, and improves the easy tearing performance of the adhesive sticker. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of the packaging bag of the present application;

[0023] Figure 2 is a structural top view schematic diagram of the existing adhesive sticker of the present application;

[0024] Figure 3 is a structural top view schematic diagram of the existing adhesive sticker of the present application in use;

[0025] Figure 4 is a sectional structural schematic diagram of the adhesive sticker of the present application;

[0026] Figure 5 is a planar structural schematic diagram of the silicone guide wheel of the present application in use;

[0027] Figure 6 is a schematic diagram of the internal structure of the cover closing mechanism of the present application;

[0028] Figure 7 is a schematic diagram of the enlarged structure at A of the present application;

[0029] Figure 8 is a structural schematic diagram of the silicone guide wheel and the indentation machine of the present application in use;

[0030] Figure 9 is a structural top view schematic diagram of the indentation machine of the present application;

[0031] Figure 10 is a structural schematic diagram of the front view of the indentation machine of the present application;

[0032] Figure 11 is a structural schematic diagram of the rear view of the indentation machine of the present application. DETAILED DESCRIPTION

[0033] The present application will be further described in conjunction with the drawings and specific embodiments.

[0034] Reference Figures 1 to 11 The present embodiment provides a wet wipe packaging bag, which comprises a bag body 1, an opening 2 arranged on the top surface of the bag body 1, an adhesive sticker 3 arranged on the opening 2, and a cover closing mechanism for closing the position of the adhesive sticker 3.

[0035] One side of the adhesive sticker 3 is provided with a tear-open part 3a which is not attached to the bag body 1, and two transversely arranged reserved cutting edges 3b are arranged on the adhesive sticker 3 close to the tear-open part 3a; the adhesive sticker 3 comprises a plurality of pe layers 30a and a plurality of pp layers 30b, and the pp layers 30b are arranged between the pe layers 30a.

[0036] The pe layer and pp layer are blended by adopting a multilayer co-extrusion process as the material of the opening adhesive sticker of the wet tissue, and a removable adhesive is coated; the material has a relatively large improvement in softness compared with the conventional pp adhesive paper, and has good adhesion with the material of the wet tissue packaging material, so that the peeling force of the adhesive sticker is adjusted to 500-600 gf to meet the liquid leakage prevention problem of the wet tissue, and the material has good easy tearing property, so that the reserved knife edge at the front end can be opened to continuously and evenly tear, and a continuous point breaking easy tearing line is not needed, which effectively improves the opening and use experience of the consumer. Figure 2 and Figure 3 , Figure 2 is a continuous point breaking easy tearing line, Figure 3 The adhesive sticker has a reserved knife edge near the tearing part of the wet tissue packaging bag, and tearing backward along the tearing part can continuously and evenly tear.

[0037] The pe layer and pp layer of the adhesive sticker are preferably blended by adopting a seven-layer co-extrusion process as the material of the opening adhesive sticker of the wet tissue, the material has a thickness of 900-1000 mu, the pp layer 30b is respectively in the third layer and the fifth layer, the thickness of each pp layer and pe layer is 100-200 mu, and at least two pp layers 30b are located between the pe layers 30a. A removable adhesive is coated on the contact surface of the wet tissue packaging film, the material has a relatively large improvement in softness compared with the conventional pp adhesive sticker, and has good adhesion with the material of the wet tissue packaging material, so that the peeling force of the adhesive sticker is adjusted to 500-600 gf to meet the liquid leakage prevention problem of the wet tissue, and the use experience of the consumer is effectively improved.

[0038] The pe layer and pp layer are blended by adopting a multilayer co-extrusion process as the material of the opening adhesive sticker of the wet tissue, and a removable adhesive is coated; the material has a relatively large improvement in softness compared with the conventional pp adhesive paper, and has good adhesion with the material of the wet tissue packaging material, so that the peeling force of the adhesive sticker is adjusted to 500-600 gf to meet the liquid leakage prevention problem of the wet tissue, and the material has good easy tearing property, so that the reserved knife edge at the front end can be opened to continuously and evenly tear, and a continuous point breaking easy tearing line is not needed, which effectively improves the opening and use experience of the consumer.

[0039] The adhesive sticker material has a relatively large improvement in softness compared with the conventional pp layer adhesive sticker, the device labeling mechanism is separated from the peeling plate and uses a brush to label and reinforce, and the label is prone to wrinkling, channeling or even having brush hairs in the label. After research, a silica gel guide wheel is selected for improvement, the silica gel guide wheel can more evenly and smoothly paste the label separated from the base paper on the surface of the wet tissue packaging material, the label is accurately pasted, and there is no wrinkling, channeling or the like.

[0040] Compared with the traditional pp layer adhesive sticker, the pp layer adhesive sticker needs to be provided with a virtual line perforation line between the opening and the closing mechanism, the virtual line perforation line needs to be kept at a relatively far distance from the opening, so as to avoid extrusion in the logistics conveying process, and the bag body leaks liquid from the virtual line perforation line position,

[0041] The length of the reserved cutting edge 3b can be set according to actual use, and the length of the reserved cutting edge is usually the length distance between the tearing part and the opening. The length of the reserved cutting edge ranges from 1mm to 100mm, and the optimal length distance is 1mm to 10mm. The actual size of the product reserved cutting edge is about 2mm, which can be adjusted according to the actual product size, and is not limited to the above size.

[0042] Reference can be made to Figure 2 The dashed perforation line 3' needs to be transversely distributed on the adhesive and needs to be perforated. Reference can be made to Figure 3 Only a 1mm to 10mm reserved cut is needed to tear open. The adhesive can use Danison sr106 type flexible film or existing adhesive with the same function. A 1mm to 10mm reserved cut is needed to tear open horizontally and evenly.

[0043] The tearing part 3a is pulled to the right. Since the length of the reserved cutting edge 3b is short, the adhesive 3 can be transversely torn and pulled open through the reserved cutting edge 3b. Compared with the traditional reserved cutting edge 3b, the sealing is better, and the tearing is easier. Compared with the part of the adhesive 3 directly adhered to the top surface of the bag body 1 and pressed by the closing mechanism, when the adhesive 3 is pulled, the adhesive 3 is pulled apart on both sides by the closing mechanism, which is more labor-saving and easier.

[0044] A forming process of a wet tissue packaging bag based on the same inventive concept, comprising the following steps:

[0045] Firstly, a plurality of pe layers and a plurality of pp layers are co-extruded by an extruder to obtain a co-extruded film. Then, one side of the co-extruded film is coated with glue and pasted with a base paper. Then, the co-extruded film is spaced apart according to the length of the closing mechanism to form a reserved cutting edge, thereby obtaining an adhesive.

[0046] Secondly, a packaging film is inputted, and an opening is formed on the packaging film.

[0047] Thirdly, the adhesive is inputted, and the adhesive is flattened and compounded at the opening position of the packaging film by a silica gel guide wheel 1a. The base paper is recycled by an output roller 1b.

[0048] Fourthly, the packaging film is cut and formed to obtain a small bag for delivery.

[0049] Fifthly, the closing mechanism is inputted, and the closing mechanism is transferred to the adhesive position of the small bag for output.

[0050] The multi-layer co-extrusion technology and the extruder are conventional technologies in the field, and will not be described here.

[0051] The softness of the adhesive material used in the application is greatly improved compared with conventional pp adhesive paper. The label is easily wrinkled, and the channel even has bristles. After research, the use of silicone guide wheels is selected for improvement. The silicone guide wheels can evenly and smoothly apply the labels separated from the base paper to the surface of the wet wipe packaging material. The label sticking position is accurate, and there is no wrinkling, channeling, etc.

[0052] Under conventional wet wipe packaging, the easy-to-tear line requires a distance of more than 5mm from the edge of the opening. However, due to the influence of the bag volume, the cover mechanism cannot be made larger. When the distance from the opening edge is 5mm, the dashed line perforation line will be attached to the edge of the area not compounded with the top surface of the bag inside the cover mechanism. Due to the precision problem of the cover machine equipment on the high-speed production line, the cover mechanism often presses the adhesive dashed line perforation line position, causing the tearing of the adhesive to be difficult. The adhesive of the material reserves a cutting edge compared to the traditional dashed line perforation. It only needs to preset a reserved cutting edge at the tearing part, which can be torn parallel and flat. Since there is no dashed line perforation, the reserved cutting edge can be close to the opening of the bag top surface, which can also achieve better sealing performance at the opening position. Since the reserved cutting edge is close to the opening of the bag top surface, the reserved cutting edge can be set at a distance from the cover mechanism to avoid the cover mechanism pressing the reserved cutting edge. This improves the sealing performance of the wet wipes during logistics transportation and improves the adhesive easy-to-tear degree. It also reduces the cover precision of the cover machine and the bag during production, and avoids the cover machine pressing the opening adhesive easy-to-tear line position.

[0053] In the first step, the pp layer third layer and the fifth layer, and the pe layer are co-extruded into a film with the first layer, the second layer, the fourth layer, the sixth layer and the seventh layer, to obtain a co-extruded film. The pp layer and the pe layer are co-extruded into a seven-layer adhesive, which has good versatility and is easy to tear during use. In actual use, the pp layer and the pe layer in the middle layer can be adjacent to each other, and the material layers other than the first layer and the seventh layer can be adjusted according to actual use.

[0054] The thickness of the pp layer is 100-200μ, the thickness of the pe layer is 100-200μ, and the peeling force of the adhesive is 500-600gf. After co-extrusion, the adhesive material has a thickness of 6.6-8.6C, and the total thickness after coating is 9-10C. The softness of the material is greatly improved compared with conventional pp adhesive paper, and the easy-to-tear property is good. The adhesive is similar to the material of the wet wipe packaging material, and the adhesive is easy to stick. In the test process, the pp composite paper is adhered to the opening position of the bag top surface, and the pe layer and the pp layer are blended to adhere to the opening position of the bag top surface. Therefore, the peeling force of the adhesive is adjusted to 500-600gf to meet the liquid leakage prevention requirements of the wet wipes, and the tearing is more parallel and flat.

[0055]

[0056] The cover closing mechanism comprises an outer ring 41, an inner recessed ring 42 arranged at the middle of the outer ring 41, a protruding part 43 arranged at the inner side edge of the inner recessed ring 42, a cover 44 for closing the inner recessed part, an outer buckle part 45 arranged at the outer side of the protruding part 43, an inner ring part 46 extending and arranged at the bottom of the cover 44, and an outer protruding part 47 arranged on the inner ring part 46 and buckled with the outer buckle part 45, the outer ring 41 is arranged with a pull plate 48 at the side close to the outer buckle part 45, the cover 44 is arranged at one side of the outer ring 41, the outer ring 41 is arranged at the top surface of the bag body 1, and the outer ring 41 surrounds the adhesive sticker 3. The cover closing mechanism can also be replaced by other cover closing mechanisms with equivalent functions, and the cover closing mechanism can be closed. It can be referred to the wet tissue packaging bag disclosed in the Chinese patent No. CN201320701382.1 of the applicant.

[0057] By arranging the cover closing mechanism, when the cover needs to be opened, the cover is separated from the outer ring by pulling it upwards from the position of the pull plate, the cover leaves the position of the inner recessed ring, and the inner ring part and the protruding part are pulled apart. After the cover is opened, the adhesive sticker can be directly torn from the inner circle position of the protruding part for use. When buckling is needed, the cover is closed in the inner recessed part of the outer ring, and then the outer protruding part on the inner ring part is buckled outside the outer buckle part on the protruding part. The protruding part and the inner ring part can form a first sealing space through buckling, and the cover is closed in the position of the inner recessed ring, which can seal and close the position of the inner recessed ring to form an internal space with good sealing performance, preventing the problem of leakage of the packaging bag under pressure. In addition, the height of the outer ring is greater than the height of the cover when the cover is closed in the position of the inner recessed ring. When the cover closing mechanism is subjected to pressure, the outer ring will resist the external pressure, avoiding the problem that the cover is easily cracked under pressure. The cover closing mechanism disclosed in the embodiment is the best embodiment.

[0058] The outer side of the inner ring part 46 is provided with a sealing strip 51, and the middle of the sealing strip 51 is provided with a protruding part 52. The sealing strip is arranged around the outer side of the inner ring part, which can reduce the gap between the inner ring part and the protruding part and improve the sealing performance of the cover closing mechanism. The protruding part is arranged, and the sealing strip has an o-shaped hollow part 5a in the protruding part. Under the action of the o-shaped hollow part, the sealing strip bulges at the position of the protruding part. When the cover closing mechanism is closed, the protruding part can be compressed and flattened due to the o-shaped hollow part inside. After the cover is buckled, the protruding part will expand outward under the action of elasticity, filling the gap between the inner ring part and the protruding part, which can improve the problem that the cover is difficult to close. The inner ring part is provided with a convex rib 5b which can be inserted into the o-shaped hollow part, which facilitates the fixation of the sealing strip and prevents the sealing strip from falling off during the opening and closing process.

[0059] The raised portion 52 and the sealing strip 51 are smoothly transitioned. The raised portion 52 is provided with a plurality of grooves 53. The grooves on the raised portion can increase the anti-slip performance of the sealing strip and further prevent the sealing strip from easily falling off.

[0060] In the first step, a pre-reserved cutting edge is pressed out by a creasing machine 6. The creasing machine 6 includes a creasing frame 601, a slider 602 slidably disposed in the creasing frame 601, a drive mechanism for driving the slider 602 to move up and down, a pressure roller 603 disposed between the sliders 602, and a cutter 604 disposed outside the pressure roller 603. The drive mechanism drives the slider to move up and down, and the slider drives the cutter on the pressure roller to press down on the adhesive to form a pre-reserved cutting edge, which is convenient for the user to tear off later. The creasing machine can be replaced by an existing device that achieves the same function, which is a conventional technology and will not be described in detail here.

[0061] The driving mechanism includes a first driving rod 605 rotatably disposed on one side of the top of the indentation frame 601, a first motor 606 for driving the first driving rod 605 to rotate, a second driving rod 607 rotatably disposed in the middle of the top of the indentation frame 601, a third driving rod 608 disposed between the second driving rod 607 and the first driving rod 605, a fourth driving rod 609 disposed on one side of the second driving rod 607, a fifth driving rod 610 rotatably disposed on the other side of the top of the indentation frame 601, a concave block 611 disposed on one side of the fifth driving rod 610, a convex block 612 disposed on one side of the fourth driving rod 609 and capable of conforming to the concave block, a sixth driving rod 613 fixedly disposed on the side of the fifth driving rod 610 away from the concave block, and a seventh driving rod 614 disposed between the slider 602 and the sixth driving rod 613. The fifth driving rod 610 is provided with a groove 615 for the fourth driving rod 609 to be inserted.

[0062] The drive mechanism is configured such that a first motor drives a first drive rod to rotate, which in turn drives a second drive rod to rotate via a third drive rod. The second drive rod rotates clockwise and counterclockwise repeatedly, driving a fourth drive rod to rotate. The fourth drive rod then enters a groove on a fifth drive rod, causing the fifth drive rod to rotate as well. Simultaneously, the convex block and concave block separate. After the fourth drive rod drives the fifth drive rod to rotate, a sixth drive rod rotates, which in turn drives a slider to move downwards via a seventh drive rod. The cutter on the outside of the slider presses an indentation into the adhesive and then rises. After rising, the convex block rotates into the concave block, providing auxiliary support for the concave block and the fifth drive rod, preventing the fifth drive rod from swaying. This allows the pressure roller to suspend above for a period of time before descending. During the reciprocating motion, compared to the up-and-down movement of a cylinder, the first motor controls the speed, which in turn controls the descent time of the cutter. The pre-cutting edge is also flatter than that of a cylinder, facilitating subsequent control.

[0063] The angle between the outer cutting knife 604 of the compression roller 603 is 50-70 degrees, and the cutting knife is not limited to the angle state in the drawings, and can be adjusted according to the actual use, can be parallel to the opening transversely, and the reserved cutting edge will form 50-70 degrees, and will extend to both sides when tearing, avoiding the risk of cracking to the middle when tearing outward.

[0064] The compression roller 603 is provided with a first spiral groove 6a, the front end of the sliding block 602 is provided with a guide bracket 616, the middle of the guide bracket 616 is slidably connected with a moving block 617, the moving block 617 is slidably connected with the first spiral groove 6a, and the guide bracket 616 is provided with a driving cylinder 618 for driving the moving block 617 to move transversely.

[0065] When the beveling is needed, the compression roller moves downward, the outer cutting knife cuts the glue after pasting, and rotation is generated, the compression roller moves upward, the angle of the cutting knife is offset, in order to avoid this situation, the compression roller rotates, the moving block of the guide bracket is driven to move to one side through the first spiral groove, then the built-in push rod is moved to the limit distance by the driving cylinder, the moving block is moved to the initial position, the moving block drives the compression roller to rotate to the initial position through the first spiral groove, and the angle of the outer cutting knife is not accurate when the compression roller cuts for the second time.

[0066] In addition, the terms "first", "second", "third" and the like are used only to describe and distinguish the various singular instances from each other, and are not necessarily used to describe a particular order or sequence. Unless otherwise specified, the terms "first", "second", "third" and the like are not necessarily used to describe a particular order or sequence, but are used only to name.

[0067] In the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or can be integrated; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between 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.

[0068] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply mean that the first feature is horizontally higher than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply mean that the first feature is horizontally lower than the second feature.

[0069] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0070] Although the present application has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application as defined by the appended claims.

Claims

1. A molding process for a wet wipe packaging bag, characterized in that, The wet wipe packaging bag includes a bag body, an opening on the top surface of the bag body, an adhesive sticker on the opening, and a covering mechanism for covering the adhesive sticker. The adhesive sticker has a tear-off portion on one side that is not adhered to the bag body. The adhesive sticker has two horizontally arranged pre-reserved slits near the tear-off portion. The adhesive sticker includes multiple PE layers and multiple PP layers, wherein at least two PP layers are disposed between the PE layers. The molding process includes the following steps: The first step is to co-extrude the third and fifth layers of PP and the first, second, fourth, sixth and seventh layers of PE film using an extruder to obtain a co-extruded film. Then, one side of the co-extruded film is coated with adhesive and a backing paper is attached. Finally, pre-reserved slits are made on the co-extruded film at intervals according to the length of the covering mechanism to obtain an adhesive film. The second step is to input the membrane and create an opening in the membrane; The third step involves inputting the adhesive, flattening it with silicone guide rollers, and bonding it to the opening of the wrapping film. The bottom paper is then recycled through the output rollers. The fourth step is to cut and shape the wrapper to obtain small packages for transport. Step 5: Input the closing mechanism, transfer the closing mechanism to the adhesive position on the small package, and output.

2. The forming process of a wet wipe packaging bag according to claim 1, characterized in that: The thickness of the PP layer is 100~200μm, and the thickness of the PE layer is 100~200μm.

3. The forming process of a wet wipe packaging bag according to claim 1, characterized in that: The peel force of the adhesive is 500~600gf.

4. The forming process of a wet wipe packaging bag according to claim 1, characterized in that: The length of the reserved cutting edge is 1~10mm.

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