Paper-plastic film tearing line mold and paper-plastic film buffer packaging material

Abstract

The paper-plastic film tearing line mold comprises a cutter body, a first cutter tooth part, a second cutter tooth part and a third cutter tooth part are arranged on one side of the cutter body, the first cutter tooth part comprises a plurality of first cutter teeth which are arranged in parallel, the tooth width of each first cutter tooth is not larger than the tooth distance between every two adjacent first cutter teeth, and the second cutter tooth part comprises a plurality of second cutter teeth which are arranged in parallel. The second cutter tooth part comprises a plurality of second cutter teeth which are connected in sequence, the tooth height of the second cutter teeth is larger than that of the first cutter teeth, the third cutter tooth part comprises a plurality of third cutter teeth which are arranged in parallel, the tooth width of each third cutter tooth is larger than the tooth distance between every two adjacent third cutter teeth, and the tooth height of each second cutter tooth is larger than that of each third cutter tooth. According to the paper-plastic film tearing line mold, the tearing line is formed in the process of manufacturing a paper-plastic film buffer packaging material, the risk that the paper-plastic film buffer packaging material is broken in the production and use processes can be reduced, it can be guaranteed that the paper-plastic film buffer packaging material is conveniently broken in the use process, and an air chamber is not prone to being broken after the paper-plastic film buffer packaging material is inflated.

Description

Technical Field

[0001] The present invention relates to a tearing line die for paper-plastic film and a paper-plastic film buffer packaging. Background Art

[0002] In the logistics packaging industry, traditional plastic packaging causes great environmental pollution. Now, more and more buffer packages made of kraft paper + degradable plastic are used to replace pure plastic buffer packages. The packaging material of kraft paper + degradable plastic is a multi-layer composite packaging material (abbreviation "paper-plastic film") made of kraft paper and degradable plastic film through a composite process. The paper-plastic film solves the problems of low strength and low processability of pure degradable plastic, and also reduces the use of plastic to a certain extent.

[0003] During the production and use of paper-plastic film buffer packages, it is necessary to cut the paper-plastic film buffer packages into different lengths, and at the same time, it is necessary to ensure that the paper-plastic film buffer packages can be easily torn (torn by hand or by equipment) during use, and the material is not damaged. In the production process of existing paper-plastic film buffer packages, a knife die is used to form a tearing line on the paper-plastic film. During use, it is necessary to inflate the paper-plastic film buffer package to form a three-dimensional buffer package, and use the three-dimensional buffer package to package items.

[0004] The forming quality of the tearing line formed by the existing knife die on the paper-plastic film buffer package is general, resulting in the paper-plastic film buffer package being easily torn or broken during the production process, and the packaging strength of the paper-plastic film buffer package during use cannot be effectively guaranteed.

[0005] Therefore, how to overcome the above technical defects is an urgent technical problem for those skilled in the art to solve. Summary of the Invention

[0006] The purpose of the present invention is to provide a tearing line die for paper-plastic film and a paper-plastic film buffer package.

[0007] According to one aspect of the present invention, a tearing line die for paper-plastic film is provided, which includes a knife body. A first knife tooth part, a second knife tooth part and a third knife tooth part are provided on one side of the knife body. The second knife tooth part is arranged between the first knife tooth part and the end of the knife body, and the third knife tooth part is arranged in a region other than the first knife tooth part and the second knife tooth part on one side of the knife body. The first knife tooth part includes a plurality of first knife teeth arranged in parallel. The tooth width of the first knife tooth is not greater than the tooth pitch between adjacent two first knife teeth. The second knife tooth part includes a plurality of second knife teeth connected in sequence. The tooth height of the second knife tooth is greater than the tooth height of the first knife tooth. The third blade tooth portion includes a plurality of third blade teeth arranged in parallel, the tooth width of the third blade teeth is greater than the tooth pitch of two adjacent third blade teeth, and the tooth height of the second blade teeth is greater than the tooth height of the third blade teeth.

[0008] The paper-plastic film tear line mold of the present invention, in the process of making the paper-plastic film cushioning packaging material, the knife body will form the tear line on the paper-plastic film, because the tooth width of the first knife tooth is not greater than the tooth pitch of two adjacent first knife teeth, so when the first knife tooth part forms the first tear line on the paper-plastic film, it can be ensured that the paper-plastic film will not be cut while being cut through by the first knife tooth part, so that the paper-plastic film cushioning packaging material is not easily pulled apart and separated during the production process, reducing the risk of the paper-plastic film cushioning packaging material being disconnected during the production and use process, and because the second knife teeth are connected in sequence and the first and ... The tooth height of the second tooth is greater than that of the first tooth, and the tooth height of the second tooth is greater than that of the third tooth. Therefore, the corresponding position between the first tear line and the end of the second tooth on the paper-plastic film will completely cut off the paper-plastic film (this position can be regarded as the second tear line). When the paper-plastic film cushioning packaging is inflated, this position is disconnected, and the stress of the air chamber at this position is released. When the inflated paper-plastic film cushioning packaging is pulled, the air chamber in this area will not be torn, so that the overall inflation effect of the paper-plastic film cushioning packaging will be better. The tooth portion is arranged in an area outside the first tooth portion and the second tooth portion on one side of the knife body, and the tooth width of the third tooth is greater than the tooth pitch of two adjacent third teeth. Therefore, when the third tooth portion forms the third tear line in the area outside the first tear line and the second tear line of the paper-plastic film, it can be ensured that the paper-plastic film will not be cut while being cut through by the third tooth portion, and at the same time, it can be ensured that the paper-plastic film cushioning packaging is conveniently pulled apart during use. When the paper-plastic film cushioning packaging needs to be pulled apart during use, the paper-plastic film cushioning packaging will be easily pulled apart along the sequence of the second tear line, the third tear line, and the first tear line; using the paper-plastic film tear line mold of the present invention, the tear line formed in the process of making the paper-plastic film cushioning packaging can not only reduce the risk of the paper-plastic film cushioning packaging being broken during production and use, but also ensure that the paper-plastic film cushioning packaging is conveniently pulled apart during use, and the packaging strength of the paper-plastic film cushioning packaging during use can also be guaranteed, and the air chamber of the paper-plastic film cushioning packaging after inflation is not easy to be torn, and at the same time, it can have both manual pulling and equipment pulling two usage conditions.

[0009] In some embodiments, the first tooth portion is arranged in the middle of the blade body, the number of the first tooth portions can be two, the spacing between the two first tooth portions is twice the tooth width of the first tooth, and the two first tooth portions are symmetrically arranged about the center line of the blade body. Thus, the first tooth portion can form a first tear line in the middle of the paper-plastic film, the two first tooth portions are symmetrically arranged about the center line of the blade body and the spacing is twice the tooth width of the first tooth, so that the first tear line can be formed on two parallel arranged paper-plastic film cushioning packagings at the same time, thereby improving processing efficiency.

[0010] In some embodiments, the tooth width of the first cutting tooth may be 2.5 mm. The tooth width of the first cutting tooth is equal to the pitch between two adjacent first cutting teeth. The tooth height of the first cutting tooth may be 5 mm, and the distance between the first tooth part and the third tooth part may be 1 mm. Thus, the first cutting tooth with a tooth height of 5 mm ensures that the first tooth part can form a first tearing line on the paper-plastic film. The first tooth part has a tooth width of 2.5 mm and a pitch of 2.5 mm, thereby ensuring that the paper-plastic film buffer packaging is not easily pulled and separated during the production process, reducing the risk of disconnection of the paper-plastic film buffer packaging during production and use. The distance of 1 mm between the first tooth part and the third tooth part enables the connection position between the first tearing line and the third tearing line of the paper-plastic film buffer packaging to be easily pulled and broken during use.

[0011] In some embodiments, the two cutting edges of the first cutting tooth intersect and the included angle may be 60 degrees. Thus, this design style of the first cutting tooth ensures that the first cutting tooth can cut through the paper-plastic film to form a first tearing line.

[0012] In some embodiments, the number of the second tooth parts may be two. The two second tooth parts are respectively located on both sides of the first tooth part, and the two second tooth parts are symmetrically arranged with respect to the midline of the tool body. Thus, the two second tooth parts symmetrically arranged with respect to the midline of the tool body can completely cut the paper-plastic film at two symmetric positions on two parallelly arranged paper-plastic film buffer packagings (this position can be regarded as the second tearing line), improving the processing efficiency. When the paper-plastic film buffer packaging needs to be pulled and broken during use, the paper-plastic film buffer packaging will start from the second tearing line and be easily pulled and broken in the order of the second tearing line, the third tearing line, and the first tearing line.

[0013] In some embodiments, the tooth width of the second cutting tooth may be 4.2 mm, the tooth height of the second cutting tooth may be 6 mm, the number of the second cutting teeth may be five, and the distance between the second tooth part and the third tooth part may be 1 mm. Thus, the second cutting tooth with a tooth width of 4.2 mm and a tooth height of 6 mm ensures that the second tooth part can completely cut the paper-plastic film at the corresponding position on the paper-plastic film (this position can be regarded as the second tearing line). The sequential connection of the five second cutting teeth can ensure the length of the paper-plastic film that is completely cut, thereby ensuring that the paper-plastic film buffer packaging can be easily pulled and broken during use. The distance of 1 mm between the second tooth part and the third tooth part enables the connection position between the second tearing line and the third tearing line of the paper-plastic film buffer packaging to be easily pulled and broken during use.

[0014] In some embodiments, the two cutting edges of the second cutting tooth intersect and the included angle may be 90 degrees. Thus, this design style of the second cutting tooth ensures that the second cutting tooth can completely cut the corresponding position on the paper-plastic film.

[0015] In some embodiments, the tooth width of the third blade teeth may be 4 mm, the tooth pitch between two adjacent third blade teeth may be 1 mm, and the tooth height of the third blade teeth 131 may be 5 mm. Thus, the third blade teeth with a tooth height of 5 mm ensure that the third blade teeth portion can form a third tear line on the paper-plastic film, and the third blade teeth portion adopts a distribution of a tooth width of 4 mm and a tooth pitch of 1 mm, which can ensure that the paper-plastic film is not cut while being cut through by the third blade teeth portion, and at the same time, it can ensure that the paper-plastic film cushioning packaging is easily pulled apart during use.

[0016] In some embodiments, two tooth edges of the third cutter tooth intersect and the included angle may be 60 degrees. Thus, the pattern design of the third cutter tooth ensures that the third cutter tooth can cut through the paper-plastic film to form a third tear line.

[0017] In some embodiments, the first blade teeth, the second blade teeth, and the third blade teeth can all be single-sided. Thus, single-sided sharpening can make the first blade teeth, the second blade teeth, and the third blade teeth thinner, reduce cutting resistance, and single-sided sharpening can maintain a consistent cutting angle, avoid cutting deviation, and make the blade body cut the paper-plastic film more stably.

[0018] According to one aspect of the present invention, there is also provided a paper-plastic film cushioning packaging material, which is manufactured by forming a tear line on the paper-plastic film cushioning packaging material using a paper-plastic film tear line mold.

[0019] The paper-plastic film cushioning packaging made of the paper-plastic film tear line mold of the present invention can reduce the risk of the paper-plastic film cushioning packaging being broken during production and use, and can ensure that the paper-plastic film cushioning packaging is conveniently pulled apart during use. The packaging strength of the paper-plastic film cushioning packaging during use can also be guaranteed, and the air chamber of the paper-plastic film cushioning packaging is not easily torn after being inflated. At the same time, it can be used in both manual pulling and equipment pulling.

[0020] According to one aspect of the present invention, there is also provided a paper-plastic film cushioning packaging material, comprising a paper-plastic film cushioning packaging material body, wherein a first tear line, a second tear line and a third tear line are arranged on the film cushioning packaging material body, the first tear line, the second tear line and the third tear line are distributed on a straight line from one side to the other side of the film cushioning packaging material body, the second tear line is located between the first tear line and one side of the film cushioning packaging material body, the third tear line is distributed in an area other than the first tear line and the second tear line on the straight line from one side to the other side of the film cushioning packaging material body, the first tear line comprises first perforations arranged at intervals, the second tear line is in a broken shape as a whole, the third tear line comprises second perforations arranged at intervals, the length of the first perforations is not greater than the spacing between two adjacent first perforations, and the length of the second perforations is greater than the spacing between two adjacent second perforations.

[0021] For the paper-plastic film buffer packaging of the present invention, since the length of the first perforation is not greater than the spacing between two adjacent first perforations, the first tear line can ensure that the paper-plastic film buffer packaging is not easily pulled apart and separated during the production process, reducing the risk of disconnection of the paper-plastic film buffer packaging during production and use. Since the second tear line is in a disconnected state as a whole, and the position of the second tear line is in a disconnected state when the paper-plastic film buffer packaging is inflated, the stress of the air chamber at this position is released. When pulling the inflated paper-plastic film buffer packaging, the air chamber in this area will not be torn, so that the overall inflation effect of the paper-plastic film buffer packaging will be better. Since the third tear line is distributed in the area outside the first tear line and the second tear line on the straight line from one side to the other side of the film buffer packaging body and the length of the second perforation is greater than the spacing between two adjacent second perforations, the third tear line can ensure that the paper-plastic film buffer packaging is easily pulled apart during use. When it is necessary to pull apart the paper-plastic film buffer packaging during use, the paper-plastic film buffer packaging will be easily pulled apart in the order of the second tear line, the third tear line, and the first tear line, and it can be pulled apart manually or by equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a paper-plastic film tear line mold according to an embodiment of the present invention; Figure 2 is Figure 1 a schematic structural diagram of another perspective of the paper-plastic film tear line mold shown; Figure 3 is Figure 2 an enlarged structural diagram of part A in the paper-plastic film tear line mold shown; Figure 4 is Figure 2 an enlarged structural diagram of part B in the paper-plastic film tear line mold shown; Figure 5 is Figure 2 an enlarged structural diagram of part C in the paper-plastic film tear line mold shown; Figure 6 is Figure 2 a schematic structural diagram of the paper-plastic film tear line mold shown along the D-D direction; Figure 7 is a schematic structural diagram of a paper-plastic film tear line mold according to another embodiment of the present invention; Figure 8 is a schematic structural diagram of a paper-plastic film buffer packaging according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0025] Embodiment 1: Figures 1 to 6 Schematically shows the structure of a paper-plastic film tearing line die according to an embodiment of the present invention.

[0026] Refer to Figures 1 to 6 , a paper-plastic film tearing line die includes a tool body 1.

[0027] In this embodiment, the tool body 1 is made of high-speed steel as a whole. The material is more wear-resistant and has good toughness, and can be used for a long time and multiple times. In other embodiments, according to needs, the tool body 1 can also be made of other hard, wear-resistant and tough materials.

[0028] Refer to Figure 2 , in this embodiment, the total length L1 of the tool body 1 is 840 mm. In other embodiments, according to the requirements for installing the tool body 1 on the equipment for manufacturing paper-plastic film buffer packages, the total length of the tool body 1 can be adjusted.

[0029] Refer to Figure 1 and Figure 2 , a first tooth portion 11, a second tooth portion 12 and a third tooth portion 13 are formed on one side of the tool body 1. The first tooth portion 11 is located at the middle position of the tool body 1. The second tooth portion 12 is located between the first tooth portion 11 and the end of the tool body 1. The third tooth portion 13 is located in the area other than the first tooth portion 11 and the second tooth portion 12 on one side of the tool body 1, that is, in the area on one side of the tool body 1 except for the first tooth portion 11 and the second tooth portion 12, the other areas are all the third tooth portion 13. The first tooth portion 11 can form a first tearing line at the middle position of the paper-plastic film. The second tooth portion 12 will completely cut the paper-plastic film at the corresponding position between the middle and the end of the paper-plastic film (this position can be regarded as the second tearing line). The third tooth portion 13 forms a third tearing line in the area other than the first tearing line and the second tearing line of the paper-plastic film.

[0030] Reference Figures 1 to 3 , the first cutter tooth part 11 includes a plurality of first cutter teeth 111 arranged in parallel. The tooth width of the first cutter teeth 111 is not greater than the tooth pitch between two adjacent first cutter teeth 111 in the first cutter tooth part 11. In this embodiment, the first cutter tooth part 11 includes five first cutter teeth 111 arranged in parallel, and the tooth width of the first cutter teeth 111 is equal to the tooth pitch between two adjacent first cutter teeth 111 in the first cutter tooth part 11. Specifically, the tooth width L7 of the first cutter teeth 111 is 2.5 mm, the tooth height L8 of the first cutter teeth 111 is 5 mm, and the tooth pitch L6 between two adjacent first cutter teeth 111 in the first cutter tooth part 11 is 2.5 mm. The first cutter teeth 111 with a tooth height of 5 mm ensure that the first cutter tooth part 11 can form the first tearing line at the middle position of the paper-plastic film. The first cutter tooth part 11 adopts a distribution of a tooth width of 2.5 mm and a tooth pitch of 2.5 mm, so as to ensure that the middle position of the paper-plastic film buffer packaging is not easily broken during production and use, and reduce the risk of the middle position of the paper-plastic film buffer packaging being broken during use.

[0031] Reference Figure 3 , the two tooth edges of the first cutter teeth 111 intersect, that is, the free end of the first cutter teeth 111 is pointed. The included angle α1 between the two tooth edges of the first cutter teeth 111 is 60 degrees, and the included angle α2 between the adjacent two tooth edges of two adjacent first cutter teeth 111 is also 60 degrees. This design of the first cutter teeth 111 ensures that the first cutter teeth 111 can cut through the paper-plastic film to form the first tearing line.

[0032] Reference Figures 1 to 3 , in this embodiment, the number of the first cutter tooth parts 11 is two, and the two first cutter tooth parts 11 are symmetrically arranged about the center line 100 of the cutter body 1. In this embodiment, the distance between the two first cutter tooth parts 11 is twice the tooth width of the first cutter teeth 111. Specifically, the distance L5 between the two first cutter tooth parts 11 is twice the tooth width L7 of the first cutter teeth 111, that is, the distance L5 between the two first cutter tooth parts 11 is 5 mm, and the lengths L2 of the two first cutter tooth parts 11 are both 25 mm. The two first cutter tooth parts 11 are symmetrically arranged about the center line 100 of the cutter body 1 and the distance is twice the tooth width of the first cutter teeth 111, so that the first tearing line can be formed for two paper-plastic film buffer packagings arranged in parallel at the same time, improving the processing efficiency.

[0033] Reference Figure 2, the distance between the leftmost first cutting tooth 111 of the first cutting tooth part 11 on the left side and the rightmost third cutting tooth of the adjacent third cutting tooth part 13 is 1 mm. The distance between the rightmost first cutting tooth 111 of the first cutting tooth part 11 on the right side and the leftmost third cutting tooth of the adjacent third cutting tooth part 13 is 1 mm. The distance of 1 mm between the first cutting tooth part 11 and the third cutting tooth part 13 can make the connection position of the first tearing line formed by the first cutting tooth part 11 and the third tearing line formed by the third cutting tooth part 13 on the plastic film buffer packaging of the paper-plastic film also easily be torn off during the use of the paper-plastic film buffer packaging.

[0034] Reference Figure 1 , Figure 2 and Figure 4 , the second cutting tooth part 12 includes a plurality of sequentially connected second cutting teeth 121. The tooth height of the second cutting tooth 121 is greater than the tooth height of the first cutting tooth 111. In this embodiment, the second cutting tooth part 12 includes five sequentially connected second cutting teeth 121. Specifically, the tooth width of the second cutting tooth 121 is 4.2 mm, and the total width L3 of the five sequentially connected second cutting teeth 121 is 4.2 mm * 5 = 21 mm. The tooth height L9 of the second cutting tooth 121 is 6 mm. The second cutting tooth 121 with a tooth width of 4.2 mm and a tooth height of 6 mm ensures that the second cutting tooth part 12 can completely cut off the paper-plastic film at the corresponding position on the paper-plastic film (this position can be regarded as the second tearing line). The sequential connection of the five second cutting teeth 121 can ensure the length of the paper-plastic film completely cut off on the paper-plastic film, thereby ensuring that the paper-plastic film buffer packaging can be easily torn off during use.

[0035] Reference Figure 4 , the two tooth edges of the second cutting tooth 121 intersect, that is, the free end of the second cutting tooth 121 is pointed. The included angle α3 between the two tooth edges of the second cutting tooth 121 is 90 degrees, and the included angle α4 between the adjacent two tooth edges of the adjacent two second cutting teeth 121 is also 90 degrees. This design of the second cutting tooth 121 ensures that the second cutting tooth 121 can completely cut off the paper-plastic film at the corresponding position.

[0036] Reference Figure 1 and Figure 2 , in this embodiment, the number of the second cutting tooth parts 12 is two. The two second cutting tooth parts 12 are respectively located on both sides of the first cutting tooth part 11, and the two second cutting tooth parts 12 are symmetrically arranged about the center line 100 of the tool body 1. Reference Figure 2, the distance L4 between the second cutter tooth part 12 on the left side and the center line 100 of the cutter body 1 is 201 mm, and the distance between the second cutter tooth part 12 on the right side and the center line 100 of the cutter body 1 is also 201 mm. The two second cutter tooth parts 12 symmetrically arranged with respect to the center line 100 of the cutter body 1 can simultaneously cut the plastic film at two symmetrical positions on two parallel plastic film buffer packages (this position can be regarded as the second tearing line), improving the processing efficiency. When it is necessary to break the plastic film buffer package during use, the plastic film buffer package will be easily broken starting from the second tearing line, along the order of the second tearing line, the third tearing line, and the first tearing line.

[0037] Reference Figure 4 , the distance L10 between the second cutter tooth part 12 and the third cutter tooth part 13 on the left side is 1 mm, and the distance between the second cutter tooth part 12 and the third cutter tooth part 13 on the right side is also 1 mm. The distance of 1 mm between the second cutter tooth part 12 and the third cutter tooth part 13 can make the connection position between the second tearing line formed by the second cutter tooth part 12 and the third tearing line formed by the third cutter tooth part 13 on the plastic film buffer package during use also easy to be broken.

[0038] Reference Figure 1 , Figure 2 and Figure 5 , the third cutter tooth part 13 includes a plurality of third cutter teeth 131 arranged in parallel. The tooth width of the third cutter tooth 131 is greater than the tooth pitch between two adjacent third cutter teeth 131. The tooth height of the second cutter tooth 121 is greater than the tooth height of the third cutter tooth 131. Specifically, the tooth width L11 of the third cutter tooth 131 is 4 mm, the tooth pitch L13 between two adjacent third cutter teeth 131 is 1 mm, and the tooth height L12 of the third cutter tooth 131 is 5 mm. The tooth height of the third cutter tooth 131 is the same as the tooth height of the first cutter tooth 111. The third cutter tooth 131 with a tooth height of 5 mm ensures that the third cutter tooth part 13 can form a third tearing line on the plastic film. The distribution of the third cutter tooth part 13 with a tooth width of 4 mm and a tooth pitch of 1 mm can ensure that the plastic film is penetrated by the third cutter tooth part 13 without being cut off, and at the same time, it can ensure that the plastic film buffer package is easily broken during use.

[0039] Reference Figure 5 , the two tooth edges of the third cutter tooth 131 intersect, that is, the free end of the third cutter tooth 131 is pointed. The included angle α5 between the two tooth edges of the third cutter tooth 131 is 60 degrees, and the included angle α6 between the adjacent two tooth edges on two adjacent third cutter teeth 131 is also 60 degrees. This style design of the third cutter tooth 131 ensures that the third cutter tooth 131 can cut through the plastic film to form a third tearing line.

[0040] Reference Figure 6, the first cutting tooth 111, the second cutting tooth 121, and the third cutting tooth 131 are all single-sided edge-ground. That is, one side of the first cutting tooth 111, the second cutting tooth 121, and the third cutting tooth 131 is planar, and a cutting edge is formed on the other side. Single-sided edge-grinding can make the first cutting tooth 111, the second cutting tooth 121, and the third cutting tooth 131 thinner in size, reduce the cutting resistance, and the single-sided edge-grinding can maintain a consistent cutting angle, avoid cutting deviation, and make the cutting of the knife body 1 on the paper-plastic film more stable.

[0041] Reference Figures 1 to 6, the tear line die of the paper-plastic film of the present invention is used to be installed on the equipment for manufacturing the paper-plastic film buffer packaging. During the process of manufacturing the paper-plastic film buffer packaging, the knife body 1 can simultaneously form tear lines for two paper-plastic film buffer packages arranged in parallel. Specifically, the first cutter teeth 111 with a tooth height of 5 mm can form the first tear line on the paper-plastic film buffer package. The first cutter tooth part 11 adopts a distribution of a tooth width of 2.5 mm and a tooth pitch of 2.5 mm, ensuring that the paper-plastic film buffer package is not easily pulled and separated during the production process, reducing the risk of disconnection of the paper-plastic film buffer package during production and use. Two first cutter tooth parts 11 symmetrically arranged about the center line 100 of the knife body 1 and with a distance twice the tooth width of the first cutter teeth 111 can simultaneously form the first tear line for two paper-plastic film buffer packages arranged in parallel, improving the processing efficiency. The tooth width is 4.The second blade teeth 121 with a diameter of 2mm and a tooth height of 6mm can completely cut the paper plastic film at the corresponding position on the paper plastic film (this position can be used as the second tearing line), and the two second blade teeth 12 symmetrically arranged about the center line 100 of the blade body 1 can completely cut the paper plastic film at two symmetrical positions on two parallel arranged paper plastic film cushioning packaging materials at the same time (this position can be used as the second tearing line). When the paper plastic film cushioning packaging material is inflated, this position is disconnected, and the stress of the air chamber at this position is released. When the inflated paper plastic film cushioning packaging material is pulled, the air chamber in this area will not be torn, so that the overall inflation of the paper plastic film cushioning packaging material is The effect will be better. The third blade tooth 131 with a tooth height of 5mm can simultaneously form a third tear line for two parallel arranged paper-plastic film cushioning packaging materials. The third blade tooth portion 13 adopts a tooth width of 4mm and a tooth pitch of 1mm, which can ensure that the paper-plastic film will not be cut while being cut through by the third blade tooth portion 13, and at the same time, it can ensure that the paper-plastic film cushioning packaging material is conveniently pulled apart during use. The spacing between the first blade tooth portion 11 and the third blade tooth portion 13 is 1mm, which can make the connection position of the first tear line formed by the first blade tooth portion 11 on the plastic film cushioning packaging material and the third tear line formed by the third blade tooth portion 13 during use of the paper-plastic film cushioning packaging material. The spacing between the second tooth portion 12 and the third tooth portion 13 is 1 mm, so that the connection position of the second tear line formed by the second tooth portion 12 on the plastic film cushioning packaging material and the third tear line formed by the third tooth portion 13 can also be easily broken during use of the paper-plastic film cushioning packaging material. When the paper-plastic film cushioning packaging material needs to be broken during use, the paper-plastic film cushioning packaging material will be easily broken starting from the second tear line, along the second tear line → the third tear line, the second tear line → the third tear line → the first tear line. The tear line mold of the paper-plastic film cushioning packaging material is used, and the tear line formed in the process of making the paper-plastic film cushioning packaging material The pull line can reduce the risk of paper-plastic film cushioning packaging being disconnected during production and use, and can ensure that the paper-plastic film cushioning packaging is easy to be pulled apart during use. The packaging strength of the paper-plastic film cushioning packaging during use can also be guaranteed, and the air chamber of the paper-plastic film cushioning packaging is not easy to be pulled apart after being inflated. At the same time, it can be used in both manual pulling and equipment pulling. In addition, the first blade teeth 111, the second blade teeth 121, and the third blade teeth 131 with single-sided blades are thinner in size, which can reduce the cutting resistance, and the single-sided blade can maintain a consistent cutting angle to avoid cutting deviation, so that the blade body 1 can cut the paper-plastic film more stably. .

[0042] Embodiment 2: Figure 7 The structure of a paper-plastic film tear line mold according to another embodiment of the present invention is schematically shown.

[0043] refer to Figure 7A paper-plastic film tear line mold comprises a knife body 1, and a first knife tooth portion 11, a second knife tooth portion 12 and a third knife tooth portion 13 are formed on one side of the knife body 1.

[0044] In this embodiment, the number of the first tooth portion 11 and the second tooth portion 12 is one, and the structure and size parameters of the first tooth portion 11, the second tooth portion 12, and the third tooth portion 13 are the same as those in the first embodiment. The paper-plastic film tear line mold in this embodiment is Figure 2 The part on the left or right side of the center line 100, that is, the paper-plastic film tear line mold in this embodiment is half of the paper-plastic film tear line mold in the first embodiment.

[0045] refer to Figure 7 The paper-plastic film tear line mold of the present invention is used to be installed on equipment for making paper-plastic film cushioning packaging. In the process of making the paper-plastic film cushioning packaging, the knife body 1 forms a tear line for each paper-plastic film cushioning packaging. The tear line formed in the process of making the paper-plastic film cushioning packaging can reduce the risk of breaking of the paper-plastic film cushioning packaging during production and use, and can ensure that the paper-plastic film cushioning packaging is conveniently pulled apart during use. The packaging strength of the paper-plastic film cushioning packaging during use can also be guaranteed, and the air chamber of the paper-plastic film cushioning packaging is not easily torn after being inflated. At the same time, it can be used in both manual pulling and equipment pulling.

[0046] In other embodiments, according to processing requirements, Figure 7 The knife body 1 is a repeating unit which is sequentially connected and extended along the length direction of the knife body 1, so that tear lines can be formed on a plurality of paper-plastic film cushioning packaging materials arranged in parallel at the same time, thereby improving processing efficiency.

[0047] Embodiment three: A paper-plastic film cushioning packaging is formed by forming a tear line on the paper-plastic film cushioning packaging by the paper-plastic film tear line mold of the first or second embodiment. The paper-plastic film cushioning packaging made by the paper-plastic film tear line mold of the present invention can reduce the risk of breaking the paper-plastic film cushioning packaging during production and use, and can ensure that the paper-plastic film cushioning packaging is convenient to be pulled apart during use. The packaging strength of the paper-plastic film cushioning packaging during use can also be ensured, and the air chamber of the paper-plastic film cushioning packaging is not easy to be torn after being inflated, and can be used in both manual pulling and equipment pulling.

[0048] Embodiment 4: Figure 8 The structure of a paper-plastic film cushioning packaging material according to an embodiment of the present invention is schematically shown.

[0049] refer to Figure 8 , a paper-plastic film cushioning packaging material, comprising a paper-plastic film cushioning packaging material body 10.

[0050] On the paper-plastic film buffer packaging body 10, a first tearing line 20, a second tearing line 30 and a third tearing line 40 are formed. The first tearing line 20, the second tearing line 30 and the third tearing line 40 are distributed on a straight line from the right side to the left side of the paper-plastic film buffer packaging body 10. The second tearing line 30 is located between the first tearing line 20 and the left side of the paper-plastic film buffer packaging body 10. The third tearing line 40 is distributed in the area outside the first tearing line 20 and the second tearing line 30 on the straight line from the right side to the left side of the paper-plastic film buffer packaging body 10, that is: on the straight line from the right side to the left side of the paper-plastic film buffer packaging body 10, except for a certain length of the first tearing line 20 and the second tearing line 30, the other distributed ones are all the third tearing lines 40.

[0051] Reference Figure 8 , the first tearing line 20 includes first perforations 201 arranged at intervals. The second tearing line 30 is integrally in a disconnected state. The third tearing line 40 includes second perforations 401 arranged at intervals. The length of the first perforation 201 is not greater than the distance between adjacent two first perforations 201. In this embodiment, the length of the first perforation 201 is equal to the distance between adjacent two first perforations 201. The length of the second perforation 401 is greater than the distance between adjacent two second perforations 401.

[0052] Reference Figure 8 , for the paper-plastic film buffer packaging of the present invention, since the length of the first perforation 201 is equal to the distance between adjacent two first perforations 201, the first tearing line 20 can ensure that the paper-plastic film buffer packaging body 10 is not easily pulled and separated longitudinally during the production process, reducing the risk of disconnection of the paper-plastic film buffer packaging during use. Since the second tearing line 30 is integrally in a disconnected state, when the paper-plastic film buffer packaging body 10 is inflated, the position of the second tearing line 30 is in a disconnected state, and the stress of the air chamber at this position is released. When pulling the inflated paper-plastic film buffer packaging body 10, the air chamber in this area will not be pulled and broken, so that the overall inflation effect of the paper-plastic film buffer packaging body 10 will be better. Since the third tearing line 40 is distributed in the area outside the first tearing line 20 and the second tearing line 30 on the straight line from one side to the other side of the film buffer packaging body 10 and the length of the second perforation 401 is greater than the distance between adjacent two second perforations 401, the third tearing line 40 can ensure that the paper-plastic film buffer packaging body 10 is easily pulled and broken during use. When it is necessary to pull and break the paper-plastic film buffer packaging body 10 during use, the paper-plastic film buffer packaging body 10 will start from the second tearing line 30 and be easily pulled and broken in the order of the second tearing line 30 → the third tearing line 40, the second tearing line 30 → the third tearing line 40 → the first tearing line 20, and it has both the use cases of manual pulling and breaking and equipment pulling and breaking.

[0053] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A paper-plastic film tearing line die, characterized in that, It includes a tool body. On one side of the tool body, there are a first tooth part, a second tooth part, and a third tooth part. The second tooth part is arranged between the first tooth part and the end of the tool body. The third tooth part is arranged in an area other than the first tooth part and the second tooth part on one side of the tool body. The first tooth part includes a plurality of first teeth arranged in parallel. The tooth width of the first tooth is not greater than the tooth pitch between two adjacent first teeth. The second tooth part includes a plurality of second teeth connected in sequence. The tooth height of the second tooth is greater than the tooth height of the first tooth. The third tooth part includes a plurality of third teeth arranged in parallel. The tooth width of the third tooth is greater than the tooth pitch between two adjacent third teeth. The tooth height of the second tooth is greater than the tooth height of the third tooth.

2. The paper-plastic film tearing line die according to claim 1, wherein, The first tooth part is arranged at the middle position of the tool body. The number of the first tooth parts is two. The distance between the two first tooth parts is twice the tooth width of the first tooth. The two first tooth parts are symmetrically arranged with respect to the midline of the tool body.

3. The paper-plastic film tearing line die according to claim 1, wherein The tooth width of the first tooth is 2.5 mm. The tooth width of the first tooth is equal to the tooth pitch between two adjacent first teeth. The tooth height of the first tooth is 5 mm. The distance between the first tooth part and the third tooth part is 1 mm.

4. The paper-plastic film tearing line die according to claim 3, characterized in that, The two tooth edges of the first tooth intersect and the included angle is 60 degrees.

5. The paper-plastic film tearing line die according to claim 1, characterized in that, The number of the second tooth parts is two. The two second tooth parts are respectively located on both sides of the first tooth part. The two second tooth parts are symmetrically arranged with respect to the midline of the tool body.

6. The paper-plastic film tearing line die according to claim 1, characterized in that The tooth width of the second tooth is 4.2 mm. The tooth height of the second tooth is 6 mm. The number of the second teeth is five. The distance between the second tooth part and the third tooth part is 1 mm.

7. The paper-plastic film tearing line die according to claim 6, wherein The two tooth edges of the second tooth intersect and the included angle is 90 degrees.

8. The paper-plastic film tearing line die according to claim 1, characterized in that, The tooth width of the third tooth is 4 mm. The tooth pitch between two adjacent third teeth is 1 mm. The tooth height of the third tooth is 5 mm.

9. The paper-plastic film tearing line die according to claim 8, characterized in that, The two tooth edges of the third tooth intersect and the included angle is 60 degrees.

10. The paper-plastic film tearing line die according to any one of claims 1 to 9, characterized in that, The first tooth, the second tooth, and the third tooth are all single-sided edge-ground.

11. A paper-plastic film buffer packaging, characterized in that, It is formed by forming a tearing line on a paper-plastic film buffer packaging by the paper-plastic film tearing line die according to any one of claims 1 to 10.

12. A paper-plastic film buffer packaging, characterized in that, It includes a paper-plastic film buffer packaging body. On the paper-plastic film buffer packaging body, there are a first tearing line, a second tearing line, and a third tearing line. The first tearing line, the second tearing line, and the third tearing line are distributed on a straight line from one side to the other side of the paper-plastic film buffer packaging body. The second tearing line is located between the first tearing line and one side of the paper-plastic film buffer packaging body. The third tearing line is distributed in an area other than the first tearing line and the second tearing line on the straight line from one side to the other side of the paper-plastic film buffer packaging body. The first tearing line includes first perforations arranged at intervals. The second tearing line is integrally in a disconnected state. The third tearing line includes second perforations arranged at intervals. The length of the first perforation is not greater than the distance between two adjacent first perforations. The length of the second perforation is greater than the distance between two adjacent second perforations.

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