Drying agent packaging bag and preparation method thereof

Abstract

The invention discloses a drying agent packaging bag and a preparation method of the drying agent packaging bag. The desiccant packaging bag comprises a main body, and a containing space is formed in the main body and used for containing desiccant. The body is provided with a first end and a second end in the length direction, and transverse sealing parts are arranged at the first end and the second end of the body respectively. A longitudinal sealing part is arranged between the first end and the second end of the body and located on one side of the body in the thickness direction, and the two ends of the longitudinal sealing part are connected with a transverse sealing part of the first end of the body and a transverse sealing part of the second end of the body respectively. And the longitudinal sealing part and the transverse sealing part are respectively formed by adopting a heat sealing process. The two ends and the side faces of the main body are sealed, the two transverse sealing parts and the two longitudinal sealing parts are connected into a whole, the overall structure of the packaging bag is firmer, meanwhile, the longitudinal sealing parts and the transverse sealing parts are formed through the heat sealing technology, the risk of sealing leakage can be effectively reduced, sealing is more reliable, the safety risk of medical products can be reduced, and the packaging bag is suitable for being popularized and used. The environment-friendly effect is realized.

Description

Technical Field

[0001] The present application relates to the field of packaging, and in particular to a desiccant packaging bag and a method for preparing the desiccant packaging bag. Background Art

[0002] Desiccant is a kind of desiccant used in the pharmaceutical field to protect the quality and stability of pharmaceutical products. Desiccant is usually made into bagged form, usually after the desiccant is put into the packaging bag and the packaging bag is sealed. The existing packaging bag sealing method is usually glue bonding. Although this sealing method is low in cost, the composition of the glue poses certain safety risks to pharmaceutical products. In addition, there is a risk of leaking when the glue is not evenly applied, causing the desiccant to leak. In addition, glue needs to be added frequently during the packaging bag packaging production process, and the production pollution is relatively large, which is not environmentally friendly. Summary of the invention

[0003] The present application provides a desiccant packaging bag and a method for preparing the desiccant packaging bag to reduce the safety risks to pharmaceutical products.

[0004] In the first aspect, the present application provides a desiccant packaging bag, comprising a main body, wherein the main body has a storage space inside, and the storage space is used to store desiccant; the main body has a first end and a second end along the length direction, and the first end and the second end of the main body are respectively provided with a transverse sealing part. A longitudinal sealing part is provided between the first end and the second end of the main body, and the longitudinal sealing part is located on one side in the thickness direction of the main body, and the two ends of the longitudinal sealing part are respectively connected to the transverse sealing part of the first end of the main body and the transverse sealing part of the second end of the main body; the longitudinal sealing part and the transverse sealing part are respectively formed by heat sealing process.

[0005] In a specific possible implementation, the transverse sealing portion is provided with a recessed structure, the recessed structure extends along the length direction of the main body, there are multiple recessed structures, the multiple recessed structures are arranged along the width direction of the main body, and adjacent recessed structures are arranged at intervals.

[0006] In a specific possible implementation manner, at least one of the transverse sealing portion at the first end of the main body and the transverse sealing portion at the second end of the main body is provided with a through hole, and the through hole is located at a central position of the transverse sealing portion in the width direction of the main body.

[0007] In a specific embodiment, the through hole is in a circular, elliptical or racetrack shape.

[0008] In a specific possible implementation manner, at least one of the transverse seal portion at the first end of the main body and the transverse seal portion at the second end of the main body is provided with a notch, and the notch is located at the center of the transverse seal portion in the width direction of the main body.

[0009] In a specific embodiment, the shape of the notch is semicircular, semi-elliptical or semi-racetrack.

[0010] In a specific possible implementation, the longitudinal sealing portion includes a first connecting piece and a second connecting piece stacked in the thickness direction of the main body. In the length direction of the main body, the two ends of the first connecting piece are respectively connected to the transverse sealing portion of the first end of the main body and the transverse sealing portion of the second end of the main body; the two ends of the second connecting piece are respectively connected to the transverse sealing portion of the first end of the main body and the transverse sealing portion of the second end of the main body. In the width direction of the main body, one side edge of the first connecting piece is connected to one side edge of the second connecting piece.

[0011] In a second aspect, the present application also provides a method for preparing a desiccant packaging bag, comprising:

[0012] Heat-seal and connect the left and right sides of the strip-shaped packaging sheet to form a longitudinal seal portion, so that the strip-shaped packaging sheet forms a columnar structure;

[0013] Heat-sealing the columnar structures at preset positions along the radial direction of the columnar structures to form a transverse sealing portion, wherein the transverse sealing portion serves as an edge of a first end of a packaging bag along the length direction, and the longitudinal sealing portion is located at a central position of the columnar structure in the radial direction;

[0014] adding a desiccant into the columnar structure;

[0015] Pull the columnar structure, and heat-seal the columnar structure at a position of the columnar structure with a preset spacing distance from the one transverse sealing portion to form another transverse sealing portion, wherein the other transverse sealing portion simultaneously serves as the edge of the second end of the one packaging bag along the length direction and the edge of the first end of the other packaging bag along the length direction, thereby completing the preparation of a desiccant packaging bag;

[0016] A plurality of transverse sealing portions are repeatedly formed at the preset intervals, and the transverse sealing portions are cut along the radial direction of the columnar structure to obtain a plurality of desiccant packaging bags.

[0017] In a specific possible implementation scheme, the packaging sheet is cut into strips of a preset width;

[0018] The strip-shaped packaging sheet is collected into a roll;

[0019] The rolled packaging sheet is pulled to unfold the strip-shaped packaging sheet, and the left and right sides of the strip-shaped packaging sheet are heat-sealed and connected to form the longitudinal sealing portion.

[0020] In a specific possible implementation scheme, a preset pattern is laser printed on a preset area on a surface of one side of the packaging sheet, and the laser-printed packaging sheet is cut into strips of the preset width, and the preset pattern is located on the strip packaging sheet.

[0021] In a specific possible implementation method, the rolled packaging sheet is unrolled, and the packaging sheet is passed through the laser printing area along a predetermined trajectory and at a uniform speed, so as to laser print a predetermined pattern in a predetermined area on one side surface of the packaging sheet.

[0022] Compared with the prior art, the beneficial effects of this application are:

[0023] The desiccant packaging bag provided by the present application has a first end and a second end of the main body sealed by a transverse sealing portion, respectively, to form an effective sealing and reinforcement structure at both ends of the main body, one side of the main body is sealed by a longitudinal sealing portion, and the two transverse sealing portions are connected by the longitudinal sealing portion, so that both ends and the side surfaces of the main body are sealed, and the two transverse sealing portions and the longitudinal sealing portion are connected as a whole, and the overall structure of the packaging bag is more solid. At the same time, the longitudinal sealing portion and the transverse sealing portion are respectively formed by a heat sealing process, which can effectively reduce the risk of leakage, and the sealing is more reliable. The desiccant is not easy to leak, and compared with the use of glue sealing, it can reduce the safety risk of pharmaceutical products and is more environmentally friendly.

[0024] The preparation method of the desiccant packaging bag provided by the present application heat-seals the left and right sides of the strip packaging sheet to form a longitudinal sealing part and a columnar structure, which can ensure the good longitudinal sealing of the packaging bag, effectively prevent the leakage of the desiccant, and ensure the product quality. The longitudinal sealing part is located in the center position of the columnar structure in the radial direction, which helps to evenly distribute the stress in the length direction of the entire packaging bag, avoid the local uneven force caused by the position offset of the longitudinal sealing part, and thus improve the overall structural stability and durability of the packaging bag. The transverse sealing part is heat-sealed and connected at a preset position along the radial direction of the columnar structure, which serves as the end edge of the packaging bag, provides a reliable end seal for the packaging bag, further enhances the firmness of the packaging, and prevents the desiccant from leaking from the end. Multiple transverse sealing parts are repeatedly formed at a preset interval. This precise positioning can ensure the dimensional consistency and stability of each packaging bag, and meet the strict requirements of the pharmaceutical industry for uniform specifications. Multiple transverse sealing parts are formed and then cut radially, which can achieve batch production and improve production efficiency. The packaging process adopts a heat sealing process, which can avoid the use of adhesives such as glue that may contaminate drugs, ensure the hygiene and safety of the pharmaceutical industry, and meet the strict standards of pharmaceutical industry production. The preparation method is relatively simple, and the operation process is convenient for automated production, which can not only improve production efficiency but also reduce labor costs. At the same time, the production cost can be further reduced through precise size control and efficient material utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1The structure schematic diagram of the desiccant packaging bag provided by the present application is shown;

[0026] Figure 2 A flow chart showing a method for preparing a desiccant packaging bag provided by the present application is shown;

[0027] Figure 3 The laser printing flow chart in the method for preparing the desiccant packaging bag provided in the present application is shown.

[0028] Reference numerals:

[0029] 1-main body; 11-transverse sealing part; 12-longitudinal sealing part; 111-recessed structure; 112-notch; 2-packaging sheet; 3-unwinding roller; 4-device corrector; 5-tension roller; 6-driven wheel; 7-laser printer; 8-slitting machine. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. However, the example implementation can be implemented in various forms and should not be construed as being limited to the implementations set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all described with reference to the accompanying drawings as examples, but changes may be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings of the embodiments of the present application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0031] The following description sets forth specific details to facilitate understanding of the present application, but the embodiments of the present application can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the embodiments of the present application. Therefore, the present application is not limited to the specific implementation methods disclosed below.

[0032] First refer to Figure 1 , Figure 1 The schematic diagram of the structure of the desiccant packaging bag provided by the present application is shown. Figure 1 As shown, the desiccant packaging bag provided in the embodiment of the present application may include a main body 1, and the main body 1 has a containing space inside, and the containing space is used to contain the desiccant. Figure 1The coordinate direction in the x-axis represents the length direction of the main body 1. The main body 1 has a first end and a second end along the length direction. The first end and the second end of the main body 1 are respectively provided with a transverse sealing portion 11. A longitudinal sealing portion 12 is provided between the first end and the second end of the main body 1. The longitudinal sealing portion 12 is located on one side in the thickness direction of the main body 1. The two ends of the longitudinal sealing portion 12 are respectively connected to the transverse sealing portion 11 at the first end of the main body 1 and the transverse sealing portion 11 at the second end of the main body 1. The longitudinal sealing portion 12 and the transverse sealing portion 11 are respectively formed by heat sealing process.

[0033] In the desiccant packaging bag provided in the embodiment of the present application, the first end and the second end of the main body 1 are sealed by the transverse sealing part 11 respectively, forming an effective sealing and reinforcement structure at both ends of the main body 1, and one side of the main body 1 is sealed by the longitudinal sealing part 12, and the two transverse sealing parts 11 are connected by the longitudinal sealing part 12, so that the two ends and the side of the main body 1 are sealed, and the two transverse sealing parts 11 and the longitudinal sealing part 12 are connected as a whole, and the overall structure of the packaging bag is more solid. At the same time, the longitudinal sealing part 12 and the transverse sealing part 11 are respectively formed by a heat sealing process, which can effectively reduce the risk of leakage, and the sealing is more reliable. The desiccant is not easy to leak. Compared with the use of glue sealing, it can reduce the safety risk of pharmaceutical products and is more environmentally friendly.

[0034] In a specific implementation, the longitudinal sealing portion 12 and the transverse sealing portion 11 are respectively formed by a heat sealing process, and the desired packaging effect can be obtained by adjusting the heat sealing process parameters (such as temperature, pressure, and ultrasonic wavelength, frequency, power density, etc.), making the packaging effect easier to control, reducing the probability of problems such as false sealing or scalding, and effectively improving the yield of packaging bags.

[0035] The heat sealing process can be specifically ultrasonic heat sealing, electric pulse heat sealing, etc. Among them, ultrasonic heat sealing uses the principle of ultrasonic high-frequency vibration friction to convert the energy of ultrasonic vibration into friction energy and transfer it to the weld line on the surface of the material to be connected, and exerts pressure on it while generating heat from friction, so that the molecules of the material are fully activated to form fusion between molecular layers; the process parameters involved in ultrasonic heat sealing include ultrasonic time, that is, the time from ultrasonic action to stop, which can range from 0 to 4s, such as 0.9s; and cooling and curing time, which can range from 0 to 2s, such as 0.2s. Electric pulse heat sealing is to heat and cool the material by instantaneously turning on and off the electric heating wire, heating and cooling in a short time; the process parameters involved in electric pulse heat sealing include the number of heating times, which can range from 0 to 5 times, such as 2 times; single heating time, which can range from 0 to 3s, such as 0.5s; and single heating interval time, which can range from 0 to 3s, such as 0.2s.

[0036] After transverse heat sealing, the pattern is wide. Ultrasonic waves need to apply pressure to make the welding head fully contact the welding surface to conduct ultrasonic energy, so a certain pressure is required. At the same time, the formation of transverse heat sealing tooth pattern also requires a certain pressure, so ultrasonic heat sealing is used. After longitudinal heat sealing, the pattern is long and thin. The longitudinal sealing forming tube cannot apply too much pressure, and the electric pulse electric heating wire cannot apply too much pressure. The longitudinal heat sealing mainly relies on hot melting, and the pressure requirement is not very high, so the electric pulse heat sealing method is used.

[0037] During specific implementation, the material of the main body 1 can be non-woven fabric, DuPont paper, etc. Among them, DuPont paper is a high-density polyethylene (HDPE) material produced by DuPont, which combines the material properties of paper, film and woven cloth. It is waterproof, breathable, lightweight, strong, tear-resistant, puncture-resistant, highly reflective, diffusely reflective, UV-resistant, with unique texture and touch, and can be recycled and reused. The horizontal seal portion 11 can be formed by ultrasonic heat sealing technology, and the length and width of the horizontal seal portion 11 can be 19x11mm. The longitudinal seal portion 12 can be formed by electric pulse heat sealing technology, and the length and width of the longitudinal seal portion 12 can be 32x3mm. The overall length and width of the packaging bag can be 42x19mm.

[0038] As a possible implementation, the transverse sealing portion 11 is provided with a recessed structure 111, and the recessed structure 111 extends along the length direction of the main body 1. There are multiple recessed structures 111, and the multiple recessed structures 111 are arranged along the width direction of the main body 1, and adjacent recessed structures 111 are arranged at intervals. The design of the recessed structure 111 can increase the area of ​​the transverse sealing portion 11. Taking the main body 1 as an example of non-woven fabric, the recessed structure 111 can increase the sealing contact area of ​​the non-woven fabric, thereby improving the overall sealing of the packaging bag, ensuring the drying effect of the desiccant, extending its service life, and better protecting the pharmaceutical products from moisture and deterioration. In addition, when the packaging bag is subjected to external pressure, the recessed structure 111 can play a certain buffering role, disperse the pressure, and avoid the sealing failure of the transverse sealing portion 11 due to excessive local pressure, so that the packaging bag is more resistant to extrusion during storage, transportation, and use, and ensure the safety of the desiccant and pharmaceutical products. The multiple recessed structures 111 arranged at intervals can change the mechanical structure of the transverse sealing part 11 to a certain extent, increase the rigidity and stability of the transverse sealing part 11, and further reduce the curling and deformation of the packaging bag due to its own stress or external factors during storage, transportation, and use, so that the packaging bag can maintain a relatively flat state, ensuring the reliability of the function and use effect of the packaging bag. In addition, the multiple recessed structures 111 arranged and arranged at intervals along the width direction of the main body 1 can provide users with a position for applying force and tearing when the packaging bag needs to be opened, so as to facilitate the removal of the desiccant for replacement or reuse.

[0039] In a possible embodiment, at least one of the transverse sealing part 11 at the first end of the main body 1 and the transverse sealing part 11 at the second end of the main body 1 is provided with a through hole. In actual production, multiple packaging bags can be continuously produced and then cut into individual packaging bags. The through hole is used for sensor positioning during cutting, and the cutting position avoids the through hole. In the width direction of the main body 1, the through hole is located in the center of the transverse sealing part 11, so that the transverse sealing part 11 is more uniform when subjected to force, avoiding the phenomenon of excessive local force on the transverse sealing part 11 due to the deviation of the through hole position, thereby enhancing the overall load-bearing capacity and anti-deformation ability of the transverse sealing part 11.

[0040] In specific implementation, the shape of the through hole can be circular, oval or racetrack. For example, the through hole is oval, and the size of the through hole can be 4x2mm.

[0041] In another possible embodiment, at least one of the transverse sealing portions 11 at the first end of the main body 1 and the transverse sealing portion 11 at the second end of the main body 1 is provided with a notch 112. The shape of the notch 112 may be semicircular, semi-elliptical or semi-runway. The notch 112 is used for sensor positioning during slitting, and the slitting position passes through the notch 112. For example, before slitting, the notches 112 of the transverse sealing portions 11 of two adjacent packaging bags form a complete ellipse, and after slitting, the shapes of the notches 112 of the transverse sealing portions 11 of the two packaging bags are semi-elliptical. In the width direction of the main body 1, the notch 112 is located in the center of the transverse sealing portion 11, so that the transverse sealing portion 11 is more uniform when subjected to force.

[0042] As a possible implementation, the longitudinal sealing part 12 includes a first connecting piece and a second connecting piece stacked in the thickness direction of the main body 1. In the length direction of the main body 1, the two ends of the first connecting piece are respectively connected to the transverse sealing part 11 at the first end of the main body 1 and the transverse sealing part 11 at the second end of the main body 1; the two ends of the second connecting piece are respectively connected to the transverse sealing part 11 at the first end of the main body 1 and the transverse sealing part 11 at the second end of the main body 1. Compared with a single connecting piece, the double connecting piece structure can better combine the transverse sealing part 11 and the longitudinal sealing part 12 into a whole, which can enhance the structural strength of the main body 1 in all directions, make the entire main body 1 structure more stable, and is not prone to problems such as loosening and separation of the connection parts during use. When the main body 1 is subjected to external force, the longitudinal sealing part 12 designed in this way can disperse the force to the two connecting pieces, and then transmit it to the transverse sealing part 11 and other parts of the main body 1 through the two connecting pieces, which can avoid the situation of local stress concentration when a single connecting piece is subjected to force, improve the bearing capacity of the structure, enable the main body 1 to withstand greater external force and pressure, and reduce the risk of structural damage.

[0043] In the width direction of the main body 1, one side edge of the first connecting piece is connected to one side edge of the second connecting piece, which can form a tighter sealing boundary at the connection position, further improve the sealing of the connection position, and ensure that the desiccant inside the main body 1 will not leak from the side of the longitudinal sealing part 12, thereby ensuring the sealing effect.

[0044] Reference Figure 2 , Figure 2 The flowchart of the method for preparing the desiccant packaging bag provided by the present application is shown as follows: Figure 2 As shown, the embodiment of the present application also provides a method for preparing a desiccant packaging bag, comprising the following steps:

[0045] Heat-seal the left and right sides of the strip-shaped packaging sheet to form a longitudinal sealing portion 12, so that the strip-shaped packaging sheet forms a columnar structure; the left and right sides forming the longitudinal sealing portion 12 are the first connecting sheet and the second connecting sheet respectively;

[0046] Heat-seal the columnar structure at a preset position along the radial direction of the columnar structure to form a transverse seal portion 11, wherein the transverse seal portion 11 is an edge of a first end of a packaging bag along the length direction, and the longitudinal seal portion 12 is located at a central position in the radial direction of the columnar structure;

[0047] adding a desiccant into the columnar structure;

[0048] Pull the columnar structure and heat-seal the columnar structure at a position of the columnar structure with a preset spacing distance from one transverse sealing portion 11 to form another transverse sealing portion 11. The other transverse sealing portion 11 simultaneously serves as the edge of the second end of one packaging bag along the length direction and the edge of the first end of another packaging bag along the length direction, thereby completing the preparation of a desiccant packaging bag.

[0049] A plurality of transverse sealing portions 11 are repeatedly formed at a preset interval, and the transverse sealing portions 11 are cut along the radial direction of the columnar structure to obtain a plurality of desiccant packaging bags.

[0050] The preparation method heat-seals the left and right sides of the strip packaging sheet to form a longitudinal sealing part 12 and a columnar structure, which can ensure good longitudinal sealing of the packaging bag, effectively prevent desiccant leakage, and ensure product quality. The longitudinal sealing part 12 is located in the center of the columnar structure in the radial direction, which helps to evenly distribute stress in the length direction of the entire packaging bag, avoid local uneven force caused by the position offset of the longitudinal sealing part 12, and thus improve the overall structural stability and durability of the packaging bag. Heat-seal and connect at a preset position along the radial direction of the columnar structure to form a transverse sealing part 11, which serves as the end edge of the packaging bag and provides a reliable end seal for the packaging bag, further enhances the firmness of the packaging, and prevents desiccant from leaking from the end. Repeatedly forming multiple transverse sealing parts 11 at a preset interval distance, this precise positioning can ensure the dimensional consistency and stability of each packaging bag, and meet the strict requirements of the pharmaceutical industry for uniform specifications. Forming multiple transverse sealing parts 11 and then cutting them radially can achieve mass production and improve production efficiency. The packaging process adopts a heat sealing process, which can avoid the use of adhesives such as glue that may contaminate drugs, ensure the hygiene and safety of the pharmaceutical industry, and meet the strict standards of pharmaceutical industry production. The preparation method is relatively simple, and the operation process is convenient for automated production, which can not only improve production efficiency but also reduce labor costs. At the same time, the production cost can be further reduced through precise size control and efficient material utilization.

[0051] In a specific implementation, the packaging sheet is cut into strips of a preset width;

[0052] The strip-shaped packaging sheet is collected into a roll;

[0053] The rolled packaging sheet is pulled to unfold the strip-shaped packaging sheet, and the left and right sides of the strip-shaped packaging sheet are heat-sealed to form a longitudinal sealing portion 12 .

[0054] Cutting the packaging sheet into strips of preset width can accurately control the size of the packaging sheet, and the width of the packaging bag can be flexibly adjusted according to different packaging requirements, thereby enhancing the flexibility and adaptability of production. Packaging sheets of uniform width can ensure that the specifications of the packaging bags formed subsequently are consistent, which is convenient for subsequent use. In addition, the strip-shaped packaging sheet is easy to shape and cut during the processing process, so that the packaging sheet can be fully utilized and material waste can be reduced. The strip-shaped packaging sheet is rolled up. The rolled packaging sheet occupies a small space and is convenient for storage, storage and transportation. The possibility of damage during storage and transportation can be reduced, and the rolled form is also convenient for continuous feeding on the production line, which improves the continuity and efficiency of production and reduces labor costs. At the same time, the stability and consistency of the quality of the longitudinal sealing portion 12 can also be ensured.

[0055] In a specific implementation, a preset pattern is laser printed on a preset area on a surface of one side of the packaging sheet, and the laser-printed packaging sheet is cut into strips of preset width, and the preset pattern is located on the strip packaging sheet.

[0056] Laser printing technology can achieve high-precision and high-definition pattern printing. The preset pattern is laser-printed in the preset area on the surface of one side of the packaging sheet, which can realize accurate identification of the product. For desiccant packaging bags, accurate pattern identification helps pharmaceutical manufacturers to manage products and trace quality. It also facilitates consumers or medical staff to understand relevant information about desiccant and ensure safe use. Because the pattern is printed first and then cut, it can ensure that the preset pattern is accurately located on the strip packaging sheet, and can ensure that the preset pattern is properly positioned and neatly arranged on the packaging bag produced later, and there will be no pattern offset or missing, which can ensure the standardization and consistency of product packaging.

[0057] Compared with ink printing, laser printing is less polluting, has no risk of de-inking, and is safer. In addition, laser printing is a non-contact processing method, which will not cause mechanical damage to the packaging sheet during the printing process, and can better protect the material and performance of the packaging sheet, thereby ensuring the stability of the packaging bag quality.

[0058] In a specific implementation, the rolled packaging sheet is unrolled, and the packaging sheet is passed through the laser printing area along a predetermined trajectory and at a constant speed, so as to laser print a preset pattern in a preset area on one side surface of the packaging sheet. Figure 3 As shown, the rolled packaging sheet 2 can be installed on the unwinding roller 3, and the packaging sheet 2 can be passed through the printing work surface of the laser printer 7 at a uniform speed by the unwinding roller 3 and the tension roller 5. There can be two tension rollers 5, which are respectively arranged on the feeding side and the discharging side of the laser printer 7. The packaging sheet 2 can be tensioned by the driven wheel 6. The packaging sheet 2 can be kept stable in the left and right directions by the deflection corrector 4, and pass through the laser printer 7 according to a predetermined trajectory. The preset pattern is input into the laser printer 7, and the laser printer 7 generates a laser beam at a fixed position, etches the preset pattern on the packaging sheet 2, and completes the laser printing of the packaging sheet 2. The discharging side of the laser printer 7 can be equipped with a slitting machine 8, and the packaging sheet 2 passes through the deflection corrector 4, the tension roller 5, the driven wheel 6, the laser printer 7, the driven wheel 6, the tension roller 5 and the slitting machine 8 in sequence. After the laser printing is completed, the packaging sheet 2 is cut by the slitting machine 8 to obtain a packaging sheet of a preset width.

[0059] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited to the above embodiments. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope and spirit of the present application. If these changes and modifications fall within the scope of the claims of the present application and their equivalent technologies, the intention of the present application also includes these changes and modifications.

Claims

1. A desiccant packaging bag, characterized in that: Including the subject; The main body has a storage space inside, and the storage space is used to store the desiccant; the main body has a first end and a second end along the length direction, and the first end and the second end of the main body are respectively provided with a transverse sealing part; A longitudinal sealing portion is provided between the first end and the second end of the main body, and the longitudinal sealing portion is located on one side in the thickness direction of the main body. Both ends of the longitudinal sealing portion are respectively connected to the transverse sealing portion at the first end of the main body and the transverse sealing portion at the second end of the main body; the longitudinal sealing portion and the transverse sealing portion are respectively formed by heat sealing process.

2. The desiccant packaging bag according to claim 1, characterized in that: The transverse sealing portion is provided with a recessed structure, and the recessed structure extends along the length direction of the main body; There are a plurality of the recessed structures, and the plurality of the recessed structures are arranged along the width direction of the main body, and adjacent recessed structures are arranged at intervals.

3. The desiccant packaging bag according to claim 1, characterized in that: At least one of the transverse sealing portion at the first end of the main body and the transverse sealing portion at the second end of the main body is provided with a through hole; The through hole is located at a central position of the transverse sealing portion in a width direction of the main body.

4. The desiccant packaging bag according to claim 3, characterized in that: The through hole is in a circular, elliptical or racetrack shape.

5. The desiccant packaging bag according to claim 1, characterized in that: At least one of the transverse sealing portion at the first end of the main body and the transverse sealing portion at the second end of the main body is provided with a notch; The notch is located at a center position of the transverse sealing portion in a width direction of the main body.

6. The desiccant packaging bag according to claim 5, characterized in that: The shape of the notch is semicircular, semi-elliptical or semi-racetrack.

7. The desiccant packaging bag according to claim 1, characterized in that: The longitudinal sealing portion includes a first connecting piece and a second connecting piece stacked in a thickness direction of the main body; In the length direction of the main body, two ends of the first connecting piece are respectively connected to the transverse sealing portion of the first end of the main body and the transverse sealing portion of the second end of the main body; two ends of the second connecting piece are respectively connected to the transverse sealing portion of the first end of the main body and the transverse sealing portion of the second end of the main body; In the width direction of the main body, one side edge of the first connecting piece is connected to one side edge of the second connecting piece.

8. A method for preparing a desiccant packaging bag, characterized in that: include: Heat-seal and connect the left and right sides of the strip-shaped packaging sheet to form a longitudinal seal portion, so that the strip-shaped packaging sheet forms a columnar structure; Heat-sealing the columnar structures at preset positions along the radial direction of the columnar structures to form a transverse sealing portion, wherein the transverse sealing portion serves as an edge of a first end of a packaging bag along the length direction, and the longitudinal sealing portion is located at a central position of the columnar structure in the radial direction; adding a desiccant into the columnar structure; Pull the columnar structure, and heat-seal the columnar structure at a position of the columnar structure with a preset spacing distance from the one transverse sealing portion to form another transverse sealing portion, wherein the other transverse sealing portion simultaneously serves as the edge of the second end of the one packaging bag along the length direction and the edge of the first end of the other packaging bag along the length direction, thereby completing the preparation of a desiccant packaging bag; A plurality of transverse sealing portions are repeatedly formed at the preset intervals, and the transverse sealing portions are cut along the radial direction of the columnar structure to obtain a plurality of desiccant packaging bags.

9. The method for preparing a desiccant packaging bag according to claim 8, characterized in that: Cutting the packaging sheet into strips of a preset width; The strip-shaped packaging sheet is collected into a roll; The rolled packaging sheet is pulled to unfold the strip-shaped packaging sheet, and the left and right sides of the strip-shaped packaging sheet are heat-sealed and connected to form the longitudinal sealing portion.

10. The method for preparing a desiccant packaging bag according to claim 9, characterized in that: A preset pattern is laser printed in a preset area on a surface of one side of the packaging sheet, and the packaging sheet after laser printing is cut into strips of the preset width, wherein the preset pattern is located on the strip-shaped packaging sheet.

11. The method for preparing a desiccant packaging bag according to claim 10, characterized in that: The rolled packaging sheet is unrolled, and the packaging sheet is passed through the laser printing area at a uniform speed along a predetermined track, so as to laser print a preset pattern in a preset area on one side surface of the packaging sheet.

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