A packaging bag and a method of manufacturing the same, a mask bag, a mask

Abstract

This invention discloses a packaging bag and its preparation method, a facial mask bag, and a facial mask. The packaging bag includes a bag body with a side-sealed area at its edge. A seal is provided within the inner cavity of the bag body, with both ends of the seal connecting to the side-sealed area, dividing the inner cavity of the bag body into several cavities. The seal includes a double seal with cavities, and a pull strip matching the shape of the cavity is provided within each cavity. The pull strip includes a cut piece and a pull rod, with the cut piece located at one end of the pull rod, and the other end of the pull rod extending beyond the inner cavity of the bag body through the side-sealed area. The maximum width of the cut piece is greater than the maximum width of the seal. The pull strip is made of polyamide. A printed layer of PET is provided on the upper surface of the pull strip, and a PET layer and a PE heat-sealing layer are sequentially provided below the pull strip. In this invention, the movement of the pull strip disrupts the closed area formed by the seal, resulting in faster product mixing within the different isolated cavities and easier product extrusion.

Description

[0001] This application is a divisional application of Chinese patent application filed on September 22, 2022, with application number 202211170216.3 and entitled "A Packaging Bag and a Method for Preparing the Same". Technical Field

[0002] This invention relates to a packaging bag and its preparation method, a facial mask bag, and a facial mask. Background Technology

[0003] To address the issue of mask sheets and serums spoiling when soaked together for extended periods in traditional mask packaging, existing technologies employ dry-wet separation mask pouches. These pouches are divided into dry areas for storing the mask sheets and wet areas for storing the serum.

[0004] However, existing dry and wet separated mask pouches are either cumbersome to open and require a lot of force, making them difficult to open or only able to open a small portion of the mask's intermittent areas, resulting in a slow injection speed; or they are easy to open, but most of the intermittent areas open during transportation due to bumps or squeezing, causing the mask sheet and mask liquid to soak together before use, thus failing to achieve the expected effect.

[0005] For example, patent document CN109775113B discloses a dry-wet separation mask bag. The mask bag has a heat-sealed discontinuity in the middle, dividing it into a dry area and a wet area. Under a pressure of ≥5N, the mask liquid can flow through this discontinuity to the mask sheet. However, because this discontinuity can be opened with very little force, it is easily squeezed during storage and transportation, causing accidental mixing of the mask bag and the mask sheet. Furthermore, the discontinuity has a short breakage length and a small liquid outlet, resulting in a slow injection speed into the mask base fabric and difficulty in complete extrusion. Summary of the Invention

[0006] The main purpose of this invention is to overcome the shortcomings of existing dry-wet separation packaging bags, such as excessively short intermittent zones, easy opening under pressure, or the cumbersome method of folding and forceful squeezing required to open. This invention provides a packaging bag, its preparation method, a mask bag, and a mask. The packaging bag of this invention avoids the shortcomings of existing packaging bags, such as easy opening under intermittent pressure. Furthermore, the lengths of the seal and pull tab can be designed according to requirements, allowing products in different cavities to be mixed as needed, facilitating control of the product mixing speed.

[0007] The present invention mainly solves the above-mentioned technical problems through the following technical solutions:

[0008] This invention provides a packaging bag, which includes a packaging bag body;

[0009] The packaging bag body includes a side sealing area, which is located at the edge of the packaging bag body to form an inner cavity of the packaging bag body;

[0010] The inner cavity of the packaging bag body is provided with several seals, and the two ends of the seals are respectively connected to the side sealing area to divide the inner cavity of the packaging bag body into several independent inner cavities;

[0011] The seal has a double seal with a cavity inside, and a pull strip is provided inside the cavity. The shape of the pull strip matches the shape of the cavity.

[0012] The pull strip includes a cut piece and a pull rod. The cut piece is located at one end of the pull rod and within the cavity. The other end of the pull rod extends through the side sealing area to the outside of the inner cavity of the packaging bag body. The maximum width of the cut piece is greater than the maximum width of the double seal corresponding to the pull rod.

[0013] In this invention, the maximum width of the cut piece generally refers to the maximum width in the horizontal direction perpendicular to the seal.

[0014] This invention divides the inner cavity of the packaging bag body into two or more parts by means of the seal, which can be filled with different substances, such as facial mask paper and facial mask liquid, freeze-dried powder and solvent, dry and wet separation fruit bag, freeze-dried powder, solvent and mask paper. When multiple materials need to be mixed, the pull rod is pulled, which in turn moves the cutting piece to the other end of the pull rod. During this process, the cutting piece will cut the seal so that the independent inner cavities of the packaging bag body are connected.

[0015] In this invention, the shape of the packaging bag body can be any shape required for products applicable in the art. For example, when the packaging bag is applied to a face mask, the shape of the packaging bag body is generally rectangular or circular.

[0016] In this invention, the number of independent inner cavities in the inner cavity of the packaging bag body can be two or more, for example, including at least one dry area and at least one wet area to meet the needs of daily use.

[0017] In this invention, the edge of the packaging bag body is preferably provided with an easy-tear opening so that the product placed in the inner cavity of the packaging bag body can be taken out during use.

[0018] In this invention, the packaging bag body generally includes a front bag piece and a back bag piece, which are connected by the side sealing area to form the inner cavity of the packaging bag body. The terms "front" and "back" can be used as conventionally understood in the art, generally referring to the inner cavity formed by the combination of two bag pieces. The "front" refers to the side of the packaging bag that is presented to the consumer.

[0019] The material of the front bag can be conventional in the art, as long as it can form the desired shape of the packaging bag, and may include easy-tear film material, such as PE easy-tear film material.

[0020] The front pocket sheet may be composed of a multi-layered composite structure and may also include other functional materials, such as a printed layer and / or a composite layer; the other functional materials preferably include one or more of PET, PA, PE, and aluminum foil. The multi-layered structures are bonded together with adhesive. The adhesive is preferably a dry-applied adhesive.

[0021] The back cover sheet can also be a multi-layered composite structure. For example, the back cover sheet preferably includes a first intermediate layer and a second intermediate layer from the outside to the inside; the first intermediate layer is preferably made of PET, which has barrier properties. Using barrier PET can improve the airtightness of the packaging bag, preventing the growth of microorganisms and oxidation of the contents caused by the penetration of gases such as oxygen; it can also prevent the leakage of fragrances, solvents, etc., improving the shelf life of the contents; the barrier PET film should also have strong water vapor barrier properties to prevent mold growth of the contents due to water vapor penetration. The second intermediate layer is preferably an aluminized film, which can give the packaging bag a certain metallic luster, improving the brightness and aesthetics of the film; aluminum is light and soft, with excellent folding resistance and good toughness, without bending or cracking, thus improving the barrier properties against gases, water vapor, odors, light, etc., and extending the shelf life of the product inside the packaging bag.

[0022] The outermost layer of the front pocket sheet generally includes a printed layer.

[0023] The back pocket panel may be made of the same material and have the same structure as the front pocket panel.

[0024] In this invention, the upper and lower surfaces of the edge-sealed area are fixedly connected to the front and back bag panels of the packaging bag body, respectively, for example, by adhesive. The "upper surface" of the upper and lower surfaces refers to the surface directly in contact with one side of the front bag panel, and the "lower surface" refers to the surface directly in contact with one side of the back bag panel; they are connected to each other through a surface-to-surface connection.

[0025] In this invention, the side sealing area can be conventional in the art to achieve sealing of the packaging bag. The ratio of the width of the side sealing area to the width of the packaging bag body is preferably 1:(10~30), for example 1:20, 7:135 or 7:195.

[0026] In this invention, the upper and lower surfaces of the seal are fixedly connected to the front and back panels of the packaging bag body, respectively, for example, by adhesive. The "upper surface" refers to the surface directly in contact with one side of the front panel, and the "lower surface" refers to the surface directly in contact with one side of the back panel; they are connected to each other through a surface-to-surface connection.

[0027] In this invention, as can be seen from the packaging bag, one end of the double seals intersects, and the other end of the double seals connects to the side sealing area, thereby forming a cavity that can accommodate the pull strip.

[0028] In this invention, the seal may further include a single seal. One end of the single seal is connected to the side sealing area, and the other end of the single seal is connected to one end of the double seal. Those skilled in the art, based on the structure of the packaging bag, will understand that the single seal refers to a seal segment that does not require the placement of the pull tab.

[0029] Preferably, the width of the single seal is greater than the width of either of the double seals.

[0030] Preferably, the double sealing strip and the single sealing strip are integrally formed, for example, in a "Y" shape. The term "integral forming" has a conventional understanding within the art, and in this invention, it generally refers to being formed simultaneously through a one-step heat-sealing process. The "Y" shape mentioned in this invention does not refer to a shape identical to the letter Y, but rather to an approximate shape, i.e., one end is a single sealing strip, and the other end is a double sealing strip with an opening. The width of the single sealing strip is greater than the width of either of the double sealing strips.

[0031] In this invention, the ratio of the maximum width of the double seal to the maximum width of the pull rod is (2~10):1, preferably (4~8):1. The maximum width of the double seal refers to the maximum width used to accommodate the cut piece in the horizontal direction perpendicular to the seal. If the ratio is too small, the contact area between the seal and the cut piece is too small, which may cause only one side of the seal to be damaged when it is pulled open, making the cut piece prone to displacement. If the ratio is too large, the contact area between the seal and the cut piece is too large, requiring a larger force to break the seal.

[0032] In this invention, the pressure resistance of the seal is preferably greater than 20 kg. The pressure resistance is the force required to break the seal by compression.

[0033] In this invention, the ratio of the maximum width of the cut piece to the maximum width of the double seal corresponding to the pull rod is preferably (2~8):1; more preferably (3~7):1.

[0034] In this invention, the shape of the cut piece is preferably any one of heart shape, triangle, rhombus or arrow shape, and more preferably heart shape.

[0035] In this invention, the connection between the cut piece and the two sides of the pull rod is preferably arc-shaped. The two sides refer to the two sides near the double sealing strip. When the connection between the cut piece and the pull rod is arc-shaped, the arc-shaped connection can gradually distribute force, resulting in a smaller and more uniform tensile force.

[0036] In this invention, the other end of the pull rod is preferably provided with a handle. The handle is preferably fan-shaped, but can also be circular or rectangular.

[0037] Preferably, the side sealing area of ​​the packaging bag body has a recess matching the shape of the pull handle to facilitate placement of the pull handle. By placing the pull handle in the recess, it is easy to pull the pull bar.

[0038] Preferably, the gap between the pull handle and the edge of the recess is 2-4 mm. This facilitates the preparation of packaging bags.

[0039] In this invention, the width of the pull rod in the horizontal direction perpendicular to the seal gradually narrows from one end to the other, and the gap between the pull rod and the seal gradually decreases from one end to the other. By using a gradually narrowing pull rod width and a gradually decreasing gap between the pull rod and the seal, the pull rod can make seamless contact with the edge sealing area when it reaches the rightmost end of the seal, preventing liquid products from flowing out of the cavity.

[0040] In this invention, the material of the pull strip can be conventional in the art, and preferably includes polyamide. Using polyamide (PA) to make the pull strip can give the pull strip a breaking strength greater than 40N, which meets the strength requirements of the pull strip when the seal needs to be broken.

[0041] The pull tab typically has a printed layer on its upper surface, and a PET layer and a heat-sealing layer are sequentially arranged below it. The heat-sealing layer is made of PE. The upper surface refers to the surface that directly contacts the front bag panel, and the lower surface refers to the surface that directly contacts the back bag panel.

[0042] The material of the printed layer is preferably PET.

[0043] The present invention also provides a method for preparing the above-mentioned packaging bag, comprising the following steps:

[0044] 1) Prepare the pull strip and the packaging bag body.

[0045] 2) Place the pull strip inside the packaging bag body.

[0046] 3) The edge sealing area and the seal are formed by heat sealing process.

[0047] In step 1), the forming process of the pull strip preferably includes compounding, curing and die cutting in sequence.

[0048] Preferably, the process before lamination also includes printing.

[0049] The composite process can be carried out in the order of the layered structure of the strip. Preferably, the printed layer, polyamide layer, PET layer and heat-sealing layer are composited in sequence to obtain a composite layer. Then, the heat-sealing layers of the two composite layers are bonded together and hot-pressed.

[0050] The process includes a drying treatment after the compounding process and before the maturation process; the drying treatment is preferably carried out in a drying tunnel, and the temperature of the drying tunnel is preferably 50~80℃. The zone temperature of the drying tunnel is 50℃, 60℃, 70℃ or 80℃.

[0051] The ripening temperature is preferably 38℃±5℃.

[0052] The curing time is preferably 50 to 60 hours, for example, 56 hours.

[0053] The die-cutting can be conventional in the art, as long as it can form the desired shape of the strip.

[0054] In step 1), those skilled in the art will know from the packaging bag that the manufacturing process of the packaging bag body preferably includes preparing the front bag piece and the back bag piece of the packaging bag body.

[0055] The front and back bag pieces generally include a heat-sealing layer, which is located on the surface of the inner cavity of the packaging bag body, thereby enabling the formation of the side seal area or the seal strip during the heat-sealing process in step 3).

[0056] The method for preparing the front panel of the packaging bag body preferably includes, in sequence, lamination, curing, and die-cutting.

[0057] The process of laminating typically includes printing.

[0058] Preferably, the packaging bag body is laminated sequentially from the outer surface to the inner wall, for example, sequentially laminating the printing layer, the first intermediate layer, the second intermediate layer, and the heat-sealing layer.

[0059] The process of compounding may further include drying. The drying is preferably carried out in an oven. The temperature of the oven can be 50-80°C. The zone temperatures of the oven are 50°C, 60°C, 70°C, and 80°C.

[0060] The ripening temperature can be 38±5℃.

[0061] The ripening time can be 50 to 60 hours.

[0062] The back pocket can be prepared using the same method as the front pocket.

[0063] In this invention, the temperature of the sealing knife in the heat sealing process of the edge sealing area can be 200~230℃.

[0064] Preferably, in the heat sealing process of the edge sealing area, the average heat sealing strength of the edge sealing area is ≥25N / 15mm.

[0065] Preferably, in the heat sealing process of the edge sealing area, the minimum value of the heat sealing strength of the edge sealing area is ≥12N / 15mm.

[0066] Preferably, in the heat sealing process of the seal, the sealing blade temperature of the seal is 180~200℃.

[0067] Preferably, in the heat-sealing process of the seal, the average heat-sealing strength of the seal is 8~12N / 15mm. Controlling the heat-sealing strength of the seal within the preferred range can, on the one hand, prevent product mixing due to errors during storage and transportation caused by insufficient seal strength; on the other hand, it can achieve one-time stretching of the strip, thus preventing the strip from breaking.

[0068] In this invention, the preferred method of lamination is dry lamination. Dry lamination is conventional in the art and generally refers to a method of laminating with an adhesive in a dry state. This involves first applying the adhesive to a substrate, drying it in an oven to remove all solvent, then melting the adhesive under heat, and finally bonding it to another substrate. After curing, a composite material with excellent properties is produced. Preferably, the adhesive is a dry lamination adhesive.

[0069] The present invention also provides a packaging bag, which is prepared by the above-described method.

[0070] The present invention also provides a mask bag, which is the packaging bag described above.

[0071] The present invention also provides a face mask comprising the aforementioned packaging bag.

[0072] Preferably, the packaging bag body contains a few independent inner cavities filled with facial mask liquid and facial mask sheet respectively.

[0073] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0074] The reagents and raw materials used in this invention are all commercially available.

[0075] The positive and progressive effects of this invention are as follows: When the packaging bag is opened by pulling the pull tab, the closed area formed by the cavity of the seal is broken through the movement of the pull tab. The opening length of the seal can be designed according to requirements, allowing for faster mixing of products within different isolated cavities and easier product extrusion. Compared to the squeeze-type bag-breaking method used in existing technologies, the method of opening the seal by pulling the tab provided by this invention is less likely to cause the seal to tear due to accidental squeezing, facilitating storage and transportation; moreover, the method of opening the seal by pulling the tab is more interesting, convenient, and elegant. Attached Figure Description

[0076] Figure 1 This is a schematic diagram of the mask bag structure in the unopened state of the seal in Embodiment 1 of the present invention.

[0077] Figure 2 This is a schematic diagram of the mask bag structure in the open state of the seal in Embodiment 1 of the present invention.

[0078] Figure 3 This is a schematic diagram of the layered structure of the front panel of the mask bag in Embodiment 1 of the present invention.

[0079] Figure 4 This is a schematic diagram of the layered structure of the back panel of the mask bag in Embodiment 1 of the present invention.

[0080] Figure 5 This is a schematic diagram of the layered structure of the pull tab of the mask bag in Embodiment 1 of the present invention.

[0081] Explanation of reference numerals in the attached figures

[0082] 1-Packaging bag body, 2-Side seal area, 3-Easy-tear opening, 4-Cut piece, 5-Pull rod, 6-Pull handle, 7-Single seal, 8-Double seal, 9-PET printing layer, 10-Inner printing ink, 11-Dry adhesive, 12-PET first intermediate layer, 13-High-barrier PET second intermediate layer, 14-Easy-to-open PE heat-seal layer, 15-Aluminum-plated first intermediate layer, 16-PA first intermediate layer, 17-PET second intermediate layer, 18-PE heat-seal layer. Detailed Implementation

[0083] The present invention is further illustrated below by way of embodiments, but the invention is not limited to the scope of the embodiments described herein. Experimental methods in the following embodiments that do not specify specific conditions were performed according to conventional methods and conditions, or as selected according to the product instructions.

[0084] Example 1

[0085] This embodiment provides a mask bag, such as Figure 1 and Figure 2As shown, the packaging bag includes a main body 1, which comprises a front bag panel and a back bag panel. The edges of the front and back bag panels are provided with side-sealing areas 2. The front and back bag panels are fixedly connected through the side-sealing areas 2 to form the inner cavity of the main body 1. The front and back bag panels are 195mm long and 135mm wide, and the side-sealing area 2 is 7mm wide. An easy-tear opening 3 is provided at the long edge of the main body 1, and the distance between the easy-tear opening 3 and the short edge of the main body 1 is 20mm. The packaging bag can be easily opened through the easy-tear opening 3 to remove the product inside.

[0086] The inner cavity of the packaging bag body 1 is provided with a seal, and the two ends of the seal are connected to the side sealing area 2 respectively, dividing the inner cavity of the packaging bag body 1 into two parts. The distance between the seal and the upper and lower side sealing areas 2 on the packaging bag body is 87.75mm. The seal includes a single seal 7 and a double seal 8. The maximum width of the double seal 8 is 26.5 mm, the width of the single seal 7 is 6.8 mm, and the width of any one of the double seals 8 is 3.4 mm. The double seal 8, together with the front bag panel, the back bag panel, and the side seal area 2, forms a cavity. A pull strip is installed within the cavity. The pull strip includes a cut piece 4, a pull rod 5, and a pull handle 6 connected in sequence. The cut piece 4 is heart-shaped, with its wide end connecting to the pull rod 5 at an arc-shaped joint. The maximum width of the cut piece 4 is 20 mm. The cut piece 4 and the pull rod 5 are partially located within the cavity of the double seal 8. The width of the pull rod 5 in the horizontal direction perpendicular to the seal gradually narrows from one end to the other, and the gap between the pull rod 5 and the seal gradually decreases from one end to the other. Figure 2 It can be seen that when the pull strip reaches the rightmost end of the seal, the pull strip makes seamless contact with the side seal area, which can prevent liquid products from flowing out through the cavity. The pull handle 6 is fan-shaped and is located on the outside of the packaging bag body 1. The packaging bag body 1 has a recess on the position of the pull handle 6 that matches the shape of the pull handle 6. When the seal is closed, the pull handle 6 is located in the recess, and the gap between the pull handle 6 and the edge of the recess is 2~4mm.

[0087] This embodiment also provides a method for preparing the above-mentioned packaging bag, including the following steps:

[0088] 1) Prepare the pull tabs, front pocket piece, and back pocket piece;

[0089] 2) Place the pull tab between the front pocket panel and the back pocket panel;

[0090] 3) A heat-sealing process is used to form a side sealing area and a seal.

[0091] The forming process of the strip includes the following steps:

[0092] S1. Printing: Print the printing film on the PET film, print the ink layer, and then mount the plate in reverse order.

[0093] S2. Lamination: A dry lamination process is adopted, in which printing film, PA, PET and PE are laminated in sequence, and then dried at a temperature of 50℃~80℃ in the drying tunnel. The zone temperature of the drying tunnel is 50℃, 60℃, 70℃ and 80℃ to obtain the laminated pull strip auxiliary material.

[0094] S3. Curing: Curing at 38℃±5℃ for 56 hours;

[0095] S4. Die-cutting: The pull strip material is cut into the required pull strip shape by a die-cutting blade.

[0096] The two surface layer structures of the tension strip obtained through the above steps are as follows: Figure 5 As shown, from the outside to the inside, it includes a PET printing layer 9, a reverse printing ink 10, a dry adhesive 11, a PA first intermediate layer 16, a dry adhesive 11, a PET second intermediate layer 17, a dry adhesive 11, and a PE heat-sealing layer 18. The average strength between layers is ≥2.5N / 15mm.

[0097] The forming process of the front pocket panel includes the following steps:

[0098] S1. Printing: Print the printing film on the PET film, print the ink layer, and then mount the plate in reverse order; S2. Lamination: Use a dry lamination process to sequentially laminate the printing film, PET, high-barrier PET and easy-peel PE, and then dry it at a temperature of 50~80℃ in the drying tunnel. The zone temperature of the drying tunnel is 50℃, 60℃, 70℃ and 80℃ to obtain the laminated bag sheet auxiliary material.

[0099] S3. Curing: Curing at 38℃±5℃ for 56 hours;

[0100] S4. Die-cutting: The bag body accessories are cut into the required bag shape by a die-cutting blade.

[0101] The forming process of the back pocket sheet includes the following steps:

[0102] Other processes are the same as the forming process of the front film, except that in step S2, the printed film, semi-metallized film, high-barrier PET and easy-to-peel PE are laminated in sequence.

[0103] The layered structure of the front bag sheet obtained in this embodiment is as follows: Figure 3 As shown, from the outside to the inside, it includes a PET printing layer 9, reverse printing ink 10, dry adhesive 11, a first PET intermediate layer 12, dry adhesive 11, a high-barrier PET second intermediate layer 13, dry adhesive 11, and an easy-open PE heat-sealing layer 14; the layered structure of the back bag sheet is as follows: Figure 4As shown, from the outside to the inside, the structure includes a PET printing layer 9, reverse printing ink 10, dry adhesive 11, a metallized first intermediate layer 15, dry adhesive 11, a high-barrier PET second intermediate layer 13, dry adhesive 11, and an easy-open PE heat-sealing layer 14. The average strength between the PET printing layer 9 and the metallized first intermediate layer 15 is ≥2N / 15mm; the average strength between the metallized first intermediate layer 15 and the high-barrier PET second intermediate layer 13 is ≥0.8N / 15mm; and the average strength between the high-barrier second intermediate layer 13 and the heat-sealing layer is ≥2.5N / 15mm. The easy-open PE heat-sealing layer 14 on the front and back bag panels further forms a seal and a side seal area through a heat-sealing process.

[0104] The heat sealing process for the edge sealing area and the seal includes:

[0105] S1. Heat sealing of the bag body: The die-cut strip is placed between the front and back bag pieces of the packaging bag. The edges of the front and back bag pieces of the packaging bag are heat sealed to form a side seal area by using a sealing knife temperature of 200℃~230℃ and an average heat sealing strength of ≥25N / 15mm.

[0106] S2. Heat sealing: Using a sealing knife with a temperature of 180℃~200℃ and an average heat sealing strength of 8~12N / 15mm, a heat seal is formed in the middle of the packaging bag by heat pressing, thus obtaining the mask bag.

[0107] Meanwhile, during the preparation process, the required mask sheet and mask liquid are placed in the two cavities of the packaging bag body to make a commercially available mask.

[0108] In this invention, testing showed that when the packaging bag prepared using the method of Example 1 is used to load the mask sheet and mask liquid, the seal has a pressure resistance greater than 20 kg, making it less prone to breakage during mask storage and transportation, thus facilitating mask storage and transportation. During use, the packaging bag only requires pulling a lever; the movement of the lever within the cavity opens the seal, allowing for a simple, convenient, and elegant way to quickly and thoroughly mix the mask liquid and mask sheet. Furthermore, the length of the opened seal can be controlled by adjusting the position of the cutting piece pulled by the lever, thus controlling the flow rate of the mask liquid to the mask sheet. Therefore, the mixing speed of the mask liquid and mask sheet can be controlled as needed during the opening process. Additionally, the seal in the mask bag can be completely opened, preventing mask liquid residue in the wet area and maximizing its utilization. Furthermore, the pull strip in this embodiment has a tensile strength greater than 40N, which is sufficient to break the seal while maintaining its shape and structural stability. In the process of forming the mask bag of this embodiment, a specific heat-sealing process is also employed, namely a sealing blade temperature of 180℃~200℃ and an average heat-sealing strength of 8~12N / 15mm. Combined with the specific material of the pull strip, this makes it easier to tear the seal when pulling the pull strip.

Claims

1. A package, characterized in that It includes a packaging bag body; The packaging bag body includes a side sealing area, which is arranged at the edge of the packaging bag body to form an inner cavity of the packaging bag body; The inner cavity of the packaging bag body is provided with a sealing strip, and two ends of the sealing strip are respectively connected with the side sealing area and divide the inner cavity of the packaging bag body into at least two independent inner cavities; The sealing strip includes a double sealing strip provided with a cavity, and a pull strip is arranged in the cavity, and the shape of the pull strip matches the shape of the cavity; The pull strip includes a cutting piece and a pull rod, the cutting piece is arranged at one end of the pull rod and located in the cavity, and the other end of the pull rod extends out of the inner cavity of the packaging bag body through the side sealing area; the maximum width of the cutting piece is greater than the maximum width of the double sealing strip corresponding to the pull rod; The material of the pull strip is polyamide; The upper surface of the pull strip is provided with a printing layer, wherein the material of the printing layer is PET, and the lower surface of the pull strip is sequentially provided with a PET layer and a heat sealing layer, and the material of the heat sealing layer is PE.

2. The package of claim 1, wherein The outer contour shape of the packaging bag body includes a rectangle or a circle; And / or, the number of the independent inner cavities in the packaging bag body is 2 or more than 2; And / or, the packaging bag body includes a front bag piece and a back bag piece, and the front bag piece and the back bag piece are connected to form the inner cavity of the packaging bag body through the side sealing area; And / or, the packaging bag is a mask bag.

3. The package of claim 2, wherein The independent inner cavity includes at least one dry area and at least one wet area.

4. The package of claim 2, wherein The material of the front bag piece is a tearable film material; And / or, the front bag piece is composed of a multi-layer structure; And / or, the front bag piece includes other functional materials; And / or, the back bag piece is composed of a multi-layer structure; And / or, the material and structure of the back bag piece are the same as those of the front bag piece.

5. The package of claim 4, wherein, The material of the front bag piece is a PE tearable film material.

6. The package of claim 4, wherein The front bag piece includes a printing layer and / or a composite layer.

7. The package of claim 6, wherein The outermost layer of the front bag piece includes the printing layer.

8. The package of claim 4, wherein The multi-layer structure is bonded into one body by glue, and the glue is dry glue.

9. The package of claim 4, wherein The other functional materials include one or more of PET, PA, PE and aluminum foil.

10. The package of claim 4, wherein, The back bag piece includes a first intermediate layer and a second intermediate layer from outside to inside.

11. The package of claim 10, wherein, The material of the first intermediate layer is PET.

12. The package of claim 1, wherein The edge of the packaging bag body is provided with a tearable opening; And / or, the width of the side sealing area is 1: (10-30) of the width of the packaging bag body; and / or, one end of the double sealing strip intersects, the other end of the double sealing strip is connected with the side sealing area, and the cavity capable of accommodating the pull strip is formed; And / or, the sealing strip further includes a single sealing strip, one end of the single sealing strip is connected with the side sealing area, and the other end of the single sealing strip is connected with one end of the double sealing strip; And / or, the ratio of the maximum width of the cutting piece to the maximum width of the double sealing strip corresponding to the pull rod is (2-8):1; And / or, the ratio of the maximum width of the double sealing strip to the maximum width of the pull rod is (2-10):1; And / or, the pressure resistance of the sealing strip is greater than 20 kg. And / or, the upper and lower sides of the edge sealing area are respectively fixedly connected to the front and back bag pieces of the packaging bag body; And / or, the upper and lower sides of the seal are fixedly connected to the front and back flaps of the packaging bag body, respectively; And / or, the connection between the cut piece and the two sides of the pull rod is arc-shaped; And / or, the shape of the cut piece is heart-shaped, triangle-shaped, rhomboid-shaped, or arrow-shaped.

13. The package of claim 12, wherein, The width ratio of the side sealing area to the width of the packaging bag body is 1:20; Alternatively, the ratio of the width of the side sealing area to the width of the packaging bag body is 7:135; Alternatively, the width ratio of the side sealing area to the width of the packaging bag body is 7:

195.

14. The package of claim 12, wherein, The single seal and the double seal are integrally formed; the width of the single seal is greater than the width of either of the double seals.

15. The package of claim 14, wherein, The single seal and the double seal form a "Y" shape.

16. The package of claim 12, wherein The ratio of the maximum width of the cut piece to the maximum width of the double seal corresponding to the pull rod is (3~7):

1.

17. The package of claim 12, wherein The ratio of the maximum width of the double seal to the maximum width of the pull rod is (4~8):

1.

18. The package of claim 12, wherein, The upper and lower sides of the side seal area are respectively connected to the front and back bag panels of the packaging bag body using adhesive.

19. The package of claim 12, wherein, The top and bottom sides of the seal are respectively bonded to the front and back panels of the packaging bag body using adhesive.

20. The package of claim 12, wherein, The cut piece is heart-shaped.

21. The package of any one of claims 1-20, wherein, The other end of the lever is provided with a handle.

22. The package of claim 21, wherein, The side sealing area of ​​the packaging bag body has a recess at the location of the pull handle that matches the shape of the pull handle, so as to facilitate the placement of the pull handle.

23. The package of claim 22, wherein, The gap between the pull handle and the edge of the recess is 2-4 mm.

24. The package of claim 21, wherein, The width of the pull rod in the horizontal direction perpendicular to the seal gradually narrows from one end to the other, and the gap between the pull rod and the seal gradually decreases from one end to the other.

25. The package of claim 21, wherein The handle can be fan-shaped, circular, or rectangular.

26. A method of making a bag according to any one of claims 1 to 25, wherein, Includes the following steps: 1) Prepare the pull strip and the packaging bag body; The forming process of the pull strip includes, in sequence, compounding, curing and die cutting; The composite process is carried out in the order of the layered structure of the pull strip, sequentially composited with a printing layer, a polyamide layer, a PET layer and a heat-sealing layer to obtain a composite layer, and then the heat-sealing layers of the two composite layers are bonded together and hot-pressed. 2) Place the pull strip inside the packaging bag body; 3) The edge sealing area and the seal are formed by heat sealing process.

27. The method of claim 26, wherein the bag is formed by: In step 1): The process before lamination also includes printing; And / or, the process further includes a drying treatment after the compounding process and before the curing process; And / or, the compounding method is dry compounding; And / or, the ripening temperature is 38℃±5℃; And / or, the ripening time is 50 to 60 hours; And / or, the die-cutting operation is simply to form the shape of the pull strip; And / or, the preparation of the packaging bag body includes a front bag piece and a back bag piece of the packaging bag body, respectively.

28. The method of producing a packaging bag according to claim 27, wherein The drying process is carried out in a drying tunnel at a temperature of 50-80°C.

29. The method of producing a packaging bag according to claim 28, wherein The zoned temperatures of the drying tunnel are 50°C, 60°C, 70°C, or 80°C.

30. The method of producing a packaging bag according to claim 27, wherein The dry lamination method refers to laminating the material using an adhesive in a dry state.

31. The method of producing a packaging bag according to claim 30, wherein The adhesive is a dry-applied adhesive.

32. The method of producing a packaging bag according to claim 27, wherein The maturation time is 56 hours.

33. The method of producing a packaging bag according to claim 27, wherein The front and back bag panels include a heat-sealing layer located on the surface of the inner cavity of the packaging bag body.

34. The method of producing a packaging bag according to claim 27, wherein The forming process of the front or back bag sheet of the packaging bag body includes, in sequence, lamination, curing and die cutting.

35. The method of producing a packaging bag according to claim 34, wherein The forming process of the front or back bag sheet of the packaging bag body meets one or more of the following conditions: a. Before the composite process, printing is also included; b. The composite is a dry composite; c. The lamination sequence is as follows: the materials of the outer surface of the packaging bag body to the wall of the inner cavity are laminated sequentially. d. The composite process also includes drying; e. The ripening temperature is 38±5℃; f. The ripening time is 50-60 hours; g. The preparation method of the back bag piece is the same as that of the front bag piece; And / or, in step 3): In the heat sealing process of the edge sealing area, the temperature of the sealing knife is 200~230℃; And / or, the average heat seal strength of the edge sealing area is ≥25N / 15mm; And / or, the minimum individual heat seal strength of the edge sealing area is ≥12N / 15mm; And / or, in the heat sealing process of the seal, the sealing blade temperature of the seal is 180~200℃; And / or, the average heat sealing strength of the seal is 8~12N / 15mm.

36. The method of producing a packaging bag according to claim 35, wherein The outer surface of the packaging bag body to the wall of the inner cavity are sequentially laminated with a printing layer, a first intermediate layer, a second intermediate layer and a heat-sealing layer.

37. The method of producing a packaging bag according to claim 35, wherein The drying process is carried out in a drying tunnel at a temperature of 50-80°C.

38. The method of producing a packaging bag according to claim 37, wherein The zone temperatures of the drying tunnel are 50℃, 60℃, 70℃, and 80℃.

39. A package, characterized by It is prepared by the method of preparing the packaging bag as described in any one of claims 26-38.

40. A mask pouch characterized by, It is the packaging bag as described in claim 39.

41. A facial mask, comprising: It includes the packaging bag as described in any one of claims 1 to 25.

42. The facial mask of claim 41 wherein the adhesive is a pressure sensitive adhesive. The packaging bag body contains several independent cavities, each containing a facial mask liquid and a facial mask sheet.

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