Easily-torn film and production method thereof

Abstract

The invention relates to an easy-to-tear film and a production method thereof applied to the technical field of easy-to-tear films, low points of edge sawteeth are arranged to be rounded corners, so that the easy-to-tear film is not easy to crack due to accidental stress, an internal denatured lining can also improve the toughness of the edge of the film, and when the easy-to-tear film needs to be torn, the edge of the easy-to-tear film is not easy to tear. Firstly, the target sawtooth part is folded along the round corner of the bottom, the two sides of the edge control wafer are folded in half, the folded position of the film body is clamped, the clamped edge is in a hardened state, then the two sides of the film body and the corresponding film body are pinched at the same time and separated outwards, the hardened denatured lining is broken, the turning position of the hard denatured lining is broken due to large stress, and then the target sawtooth part is formed. Hardness can inhibit deformation of the film body adhered to the surface of the film body, the film body can be further driven to be broken together to generate obvious cracks, at the moment, the film body can be directly torn along the cracks at the corresponding sawteeth, the easy-to-tear effect is achieved, the use size can be customized, and compared with the prior art, limitation is effectively reduced, and the application range is expanded.

Description

Technical Field

[0001] The invention relates to an easy-tear film, in particular to an easy-tear film applied in the technical field of easy-tear films and a production method thereof. Background Art

[0002] Easy-tear film is a removable protective film, mainly used in cans, beverage bottles, cosmetic packaging and other fields. The film can be easily torn off to protect the packaging from contamination and damage. However, when the film is torn off, the easy-tear film will leave some sticky substances, which will affect the appearance. The advantage of easy-tear film is that it can provide additional sealing, ensure the freshness and quality of the packaged goods, and is economical and relatively low in price.

[0003] Films are generally difficult to tear linearly due to their thinness and elasticity. When subjected to tearing or shearing forces, they are prone to local deformation. In the prior art, point breaking or edge serration is generally used to reduce the difficulty and deformation of linear tearing. However, in the point breaking tearing method, the film segments are generally of fixed size and the cross-section is only in one direction, resulting in greater limitations in use and a limited scope of application. In the edge serration method, the low point of the serration is a sharp linear turn, which can easily cause the edge of the film to break due to accidental force, and also has certain limitations. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is the point breaking and edge serration tearing methods, which have great limitations in use and a limited scope of application.

[0005] In order to solve the above problems, the present invention provides an easy-to-tear film, comprising a reel and a film body wound outside the reel, the film body comprising two film layers thermally bonded to each other, both ends of the reel are sleeved with limiting rings, a string drum elastic rope is fixedly connected between the two limiting rings, an edge control disc is strung on the string drum elastic rope, the string drum elastic rope passes through the inner side of the reel, the edge control disc comprises two magnetic semicircles and a rubber strip fixedly connected between the two magnetic semicircles, the rubber strip is made of elastic material, the string drum elastic rope movably passes through the rubber strip, and the magnetic semicircles are made of hard magnetic material; Both edges of the membrane body are fixedly connected with easy-tear edges, and a plurality of evenly distributed glue sticks and a plurality of modified liners respectively spaced apart from the plurality of glue sticks are fixedly inlaid inside the easy-tear edges. The ends of the two easy-tear edges away from the easy-tear edges are serrated, and the angle of the serrated depression is an acute angle, and the angle is rounded, and the radius of the arc is not less than 1 / 5 of the height of the serrations.

[0006] In the above-mentioned easy-to-tear film and its production method, by setting the low point of the edge serrations into a rounded turn, it is not easy to be torn due to accidental force. At the same time, with the setting of the deformable lining and the edge control disc, the edge of the film can be changed from soft to hard when tearing is required. At this time, it can be naturally broken by folding. Compared with the existing technology, the difficulty of tearing the film is greatly reduced, and the size limitation can be reduced to improve practicality.

[0007] As a further improvement of the present application, the lowest point of the serrated depression of the easy-tear edge is in contact with the edge of the degradable lining, and the degradable lining is a double-layer membrane structure filled with magnetorheological fluid.

[0008] As a further improvement of the present application, the glue stick includes an inner glue stick and an outer glue layer wrapped around the outer layer of the inner glue stick. The outer glue layer is also fixedly inlaid with mutually symmetrical magnetic materials. The inner glue stick and the outer glue layer are both made of hot-melt materials, and the melting point of the outer glue layer is lower than the melting point of the inner glue stick.

[0009] A method for producing an easily tearable film comprises the following steps: S1. The bottom film layer is passed through the composite film mold by a traction component, and the film layer is attached to the upper surface of the fixed mold, and the edge of the film layer is attached to the edge of the fixed mold by vacuum adsorption; S2, using air vibration to make the multiple fillet grooves on the fixed mold capture the glue stick, then laying the modified lining on the two edges of the fixed mold, and finally passing the upper film layer through the composite film mold through the traction component; S3, controlling the movable mold to press the fixed mold downward so that the two film layers are thermally bonded to each other, and at the same time, the edges of the two film layers are thermally bonded to the modified liner and the multiple glue sticks, and at the same time, the corresponding parts of the modified liner and the glue sticks are thermally bonded to form multiple independent individuals that are spaced apart from each other with the multiple glue sticks; S4, cutting the edge of the composite film in a serrated manner, thereby forming an easy-tear edge at the edge of the film body, forming an easy-tear film, and finally winding the easy-tear film outside the roll to complete the production of the easy-tear film; The composite membrane mold includes a fixed mold and a movable mold that match each other. The front and rear edges of the upper ends of the fixed mold and the movable mold are both provided with a plurality of evenly distributed fillet grooves. The glue stick and the fillet grooves match each other. Airways and a plurality of pairs of air holes are also provided inside the front and rear edges of the fixed mold and the movable mold. The plurality of pairs of air holes are respectively connected to the airways and the plurality of fillet grooves. The airways are connected to an external air source.

[0010] As a further improvement of the present application, in step S3, the temperature of thermal bonding is 150-200°C, and the material of the modified lining is the same as that of the film layer.

[0011] As a further improvement of the present application, magnetic sheets are fixedly embedded in the edges of the mouths of the multiple air holes facing the fillet grooves. The magnetic sheets match each other, and the magnetic sheets on the movable mold are made of aluminum-nickel-cobalt magnetic steel material, and the magnetic sheets on the fixed mold are made of electromagnetic material. There is a magnetic attraction between the side away from the axis of the inner glue rod and the upper surface of the magnetic sheet.

[0012] In step S2, the specific steps of air vibration capturing the glue stick are: S21, control the bottom of the movable mold to face upward, and then randomly spread multiple glue sticks on the surface of the movable mold facing upward, and then continuously shake it left and right to make multiple glue sticks enter the fillet grooves, and the glue sticks facing downward are adsorbed on the magnetic sheet to position them; S32, simultaneously filling a small amount of gas into the airway, so that the glue stick that is not attached to the magnetic sheet vibrates slightly until the magnetic sheet faces downward and is attached to the glue stick to be positioned; S33. When all the fillet grooves have stably absorbed the glue sticks, the movable mold is controlled to flip over so that its bottom returns to the bottom, and then controlled to approach the fixed mold and contact with the fixed mold. At this time, the magnetic sheet on the fixed mold is controlled to be energized, so as to electromagnetically absorb multiple glue sticks, so that the positions of the multiple glue sticks are shifted, and the multiple fillet grooves on the fixed mold all capture the glue sticks.

[0013] As another improvement of the present application, multiple monitoring units are installed on the movable mold, and one monitoring unit and multiple adjacent fillet grooves form a monitoring group. The monitoring unit includes an electrical component installed on the outer end of the movable mold and multiple discontinuous wire bodies respectively connected between two air holes in the same fillet groove. The multiple discontinuous wire bodies are connected in series in the circuit where the electrical components are located. In the three adjacent fillet grooves in the same monitoring group, the two air holes on the middle fillet groove are respectively electrically connected to the opposite magnetic sheets on the other two fillet grooves.

[0014] As another improvement supplement of the present application, the non-continuous line body is a multi-segment discontinuous conductive sheet structure, in which one end of two adjacent segments is fixedly connected with a downward bent spring sheet, the downward bent spring sheet does not contact the other end, and the two overlap in a top-down view, and the upper end of the downward bent spring sheet is fixedly connected with a T-shaped touch rod, which movably passes through the other end and extends above it.

[0015] In summary, by setting the low point of the edge serrations to a rounded turning point, it is not easy to crack due to accidental force, and the internal degenerate lining can also improve the toughness of the edge of the film. When tearing is required, the target serrated part is first folded along the bottom rounded corner, and the two sides of the edge control disc are folded in half and clamped at the folded part of the film to make the clamped edge hardened, and then the two sides of the film body and the corresponding film body are pinched at the same time and separated outward to make the hardened degenerate lining be broken apart, and the turning point of the hard degenerate lining is subjected to greater stress and breaks, and its hardness can inhibit the deformation of the film body bonded to its surface, and then can drive the film body to break together, resulting in obvious cracks, at this time, it can be directly torn along the cracks at the corresponding serrations to achieve an easy-to-tear effect, and the size can be customized. Compared with the existing technology, it effectively reduces limitations and expands the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of the first embodiment of the present application; Figure 2 This is a schematic diagram of the first embodiment of the present application when the edge-control disc is made to fall out of the roll downward; Figure 3 A top view of the edge control disc of the first embodiment of the present application; Figure 4 This is a schematic top view of the easily tearable film of the first embodiment of the present application; Figure 5 This is a side schematic diagram of an easily tearable film according to a first embodiment of the present application; Figure 6 This is a partial schematic diagram of the edge of the easily tearable film according to the first embodiment of the present application; Figure 7 for Figure 6 Schematic diagram at A in the middle; Figure 8 A top view of a glue stick according to a first embodiment of the present application; Fig. 9 This is a schematic diagram of a partial process of producing an easily tearable film according to the first embodiment of the present application; Fig.10 This is a schematic top view of a fixed mold of a composite mold according to a first embodiment of the present application; Fig.11 This is a schematic diagram of the bottom surface of the movable mold of the composite mold in the second embodiment of the present application.

[0017] Fig.12 This is a schematic diagram of the fillet groove portion of the second embodiment of the present application.

[0018] Fig.13 This is a partial schematic diagram of a discontinuous line body according to the second embodiment of the present application.

[0019] Description of the numbers in the figure: 1 membrane body, 11 film layer, 2 reel, 31 limit ring, 32 string rope, 4 edge control disc, 41 magnetic semicircle, 42 rubber strip, 5 easy-to-tear edge, 7 glue stick, 71 inner glue stick, 72 outer rubber layer, 8 degenerative lining, 91 fixed mold, 92 movable mold, 901 airway, 902 air hole, 903 fillet groove, 10 non-continuous line body, 101 downward bent spring piece, 102 electrical component, 103 T-shaped contact rod. DETAILED DESCRIPTION

[0020] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0021] The first implementation method: Figure 1 A tearable film is shown, comprising a roll 2 and a film body 1 wound outside the roll 2. As shown in the figure, the film body 1 comprises two film layers 11 thermally bonded to each other, and both ends of the roll 2 are sleeved with a limit ring 31, and a string elastic rope 32 is fixedly connected between the two limit rings 31. Figure 3 The string drum elastic rope 32 is provided with an edge control disc 4, the string drum elastic rope 32 passes through the inner side of the reel 2, the edge control disc 4 includes two magnetic semicircles 41 and a rubber strip 42 fixedly connected between the two magnetic semicircles 41, the rubber strip 42 is made of elastic material, and the string drum elastic rope 32 movably passes through the rubber strip 42, and the magnetic semicircle 41 is made of hard magnetic material, preferably aluminum nickel cobalt magnetic steel material; The limiting ring 31, the string elastic rope 32 and the edge control disc 4 can be recycled and reused after use, thereby reducing the manufacturing and use costs of the easy-to-tear film.

[0022] like Figure 4 The two edges of the membrane body 1 are fixedly connected with easy-tear edges 5, and the easy-tear edges 5 are fixedly inlaid with multiple uniformly distributed glue sticks 7 and multiple modified liners 8 respectively spaced apart from the multiple glue sticks 7. The modified liners 8 are double-layer membrane structures filled with magnetorheological fluid, such as Figure 8 The glue stick 7 includes an inner glue stick 71 and an outer glue layer 72 wrapped around the outer layer of the inner glue stick 71. The outer glue layer 72 is also fixedly inlaid with mutually symmetrical 73, which is made of magnetic material. The inner glue stick 71 and the outer glue layer 72 are both made of hot-melt materials, and the melting point of the outer glue layer 72 is lower than the melting point of the inner glue stick 71. The melting point of the inner glue stick 71 is slightly higher than the temperature during thermal bonding, and the melting point of the outer glue layer 72 is lower than the temperature during thermal bonding. During thermal bonding, the outer glue layer 72 of the outer layer is thermally melted first, and the bonding effect with the surrounding film layer 11 and the modified lining 8 is better. At the same time, the thermal melting speed of the inner glue stick 71 of the inner layer is slower, so that after thermal bonding, the inner glue stick 71 is not completely thermally melted, and then an obvious lining strip is formed at the edge of the easy-tear edge 5, so that it is easy to bear force during tearing.

[0023] like Figure 6-7The ends of the two easy-tear edges 5 away from the easy-tear edges 5 are serrated, the angle of the serrated depression is acute, and the angle is rounded. By setting the low point of the edge serrations to a rounded turn, it is not easy to crack due to accidental force, and the internal degenerate lining 8 can also improve the toughness of the edge of the film. The radius of the arc is not less than 1 / 5 of the height of the serrations, so that the rounded corner is not too small, thereby reducing the occurrence of accidental cracking and forming cracks. The lowest point of the serrated depression of the easy-tear edge 5 is in contact with the edge of the degenerate lining 8, so that when the degenerate lining 8 breaks, the edge of the easy-tear edge 5 can just break and form a crack.

[0024] When tearing is required, Figure 2 , the reel 2 can be placed vertically, so that the edge control disc 4 is moved down to the outside of the reel 2 along the string elastic rope 32, and then the target serrated part is folded along the bottom rounded corner, and the edge control disc 4 is brought close to the place, and the two magnetic semicircles 41 are pinched at the same time, so that the edge of the film body 1 is clamped in the two magnetic semicircles 41. Due to the magnetic field of the magnetic semicircles 41, the denatured lining 8 of the clamped part is hardened, which can support the two layers of film layers 11 thermally bonded at the edge. At this time, the magnetic semicircles 41 and the corresponding film body 1 are pinched at the same time and separated outward, so that the hardened denatured lining 8 is broken, and the turning point of the hard denatured lining 8 is subjected to greater stress and breaks, and the hard denatured lining 8 can inhibit the deformation of the film bonded to its surface, and then drive the film body 1 to break together, resulting in an obvious crack. At this time, it can be directly torn along the crack at the corresponding serrated part, which can achieve a relatively neat tearing without external shear force, and the size can be customized. Compared with the prior art, the limitations are effectively reduced.

[0025] In addition, when tearing is required, it can also be done in the following way: the edge control disc 4 can be directly pulled out to contact the target edge. At this time, the degenerate lining 8 changes from soft to hard, which can support the two layers of film layers thermally bonded to the edge. Then, the hardened edge can be folded according to the required tearing angle to break the corresponding degenerate lining 8. The hard degenerate lining 8 can inhibit the deformation of the film layer bonded to its surface, and then drive the film layer to break together, resulting in an obvious crack. At this time, it can be directly torn along the crack at the corresponding serration. In the absence of external shear force, a relatively neat tear can be achieved, and the size can be customized. Compared with the existing technology, the limitations are effectively reduced.

[0026] like Figure 4 and Figure 5 A method for producing an easily tearable film comprises the following steps: S1, the bottom film layer 11 is passed through the composite film mold by the traction component, and the film layer 11 is attached to the upper surface of the fixed mold 91, and the edge of the film layer 11 is attached to the edge of the fixed mold 91 by vacuum adsorption; S2, using air vibration to make the multiple fillet grooves 903 on the fixed mold 91 capture the glue stick 7, and then laying the modified lining 8 on the two edges of the fixed mold 91, and finally passing the upper film layer 11 through the composite film mold by the traction component; S3, such as Fig. 9 , controlling the movable mold 92 to press the fixed mold 91 downward so that the two film layers 11 are thermally bonded to each other, and at the same time, the edges of the two film layers 11 are thermally bonded to the modified liner 8 and the multiple glue sticks 7, and at the same time, the corresponding parts of the modified liner 8 and the glue sticks 7 are thermally bonded to form multiple independent individuals that are spaced apart from the multiple glue sticks 7; S4, performing a serrated cutting process on the edge of the composite film, thereby forming an easy-tear edge 5 on the edge of the film body 1, forming an easy-tear film, and finally winding the easy-tear film outside the reel 2 to complete the production of the easy-tear film; like Figure 9-10 The composite film mold includes a fixed mold 91 and a movable mold 92 that match each other. The front and rear edges of the upper ends of the fixed mold 91 and the movable mold 92 are both provided with a plurality of evenly distributed fillet grooves 903. The glue stick 7 matches the fillet grooves 903. An air channel 901 and a plurality of pairs of air holes 902 are also provided inside the front and rear edges of the fixed mold 91 and the movable mold 92. The plurality of pairs of air holes 902 are respectively connected to the air channel 901 and the plurality of fillet grooves 903. The air channel 901 is connected to an external air source. Negative pressure can be formed on the fillet groove 903 through the air channel 901 and the air holes 902, so as to facilitate the positioning of the film layer 11 and the glue stick 7.

[0027] In step S3, the temperature of thermal bonding is 150-200°C, and the material of the modified lining 8 is the same as that of the film layer 11, so that during thermal bonding, the thermal bonding effect between the modified lining 8 and the film layer 11 is better.

[0028] A plurality of air holes 902 are fixedly inlaid with magnetic sheets at the edges of the mouths of the inlay grooves 903, and the magnetic sheets match each other. The magnetic sheets on the movable mold 92 and 73 are both made of aluminum-nickel-cobalt magnetic steel material, so that both are resistant to high temperatures and not prone to demagnetization during thermal bonding, and at the same time have good electrical conductivity. The magnetic sheets on the fixed mold 91 are made of electromagnetic material, and there is a magnetic attraction between the side of 73 away from the axis of the inner glue stick 71 and the upper surface of the magnetic sheet, so that 73 will be adsorbed only when it faces downward, otherwise it will not be adsorbed, and subsequently, with the blowing effect at the air holes 902, the glue stick 7 that is not in the correct position can be vibrated and displaced upward, and then 73 can be moved to the downward direction, so that it can be positioned, so that when the blowing vibration adjusts the glue stick 7 that is not in the correct position, it is not easy to cause the position of the glue stick 7 that is in the correct position to change.

[0029] In step S2, the specific steps of air vibration capturing the glue stick 7 are: S21, control the bottom of the movable mold 92 to face upward, and then randomly spread multiple glue sticks 7 on the surface of the movable mold 92 facing upward, and then keep shaking left and right to make multiple glue sticks 7 enter the fillet groove 903, and the glue sticks 7 facing downward are adsorbed on the magnetic sheet to be positioned; S32, simultaneously filling a small amount of gas into the air passage 901, so that the glue stick 7 that is not attached to the magnetic sheet vibrates slightly until the magnetic sheet faces downward and is attached to the glue stick 7 to be positioned; S33. When all the fillet grooves 903 have stably absorbed the glue sticks 7, the movable mold 92 is controlled to flip over so that its bottom returns to the bottom, and then it is controlled to approach the fixed mold 91 and contact with the fixed mold 91. At this time, the magnetic sheet on the fixed mold 91 is controlled to be energized, so as to electromagnetically absorb multiple glue sticks 7, so that the positions of multiple glue sticks 7 are shifted, and multiple fillet grooves 903 on the fixed mold 91 can capture the glue sticks 7.

[0030] The second implementation method: This embodiment adds a monitoring unit on the basis of the first embodiment, and the rest of the parts are consistent with the first embodiment.

[0031] Figure 11-12 As shown, a plurality of monitoring units are installed on the movable mold 92, and a monitoring unit and a plurality of adjacent fillet grooves 903 form a monitoring group. The monitoring unit includes an electrical component 102 installed at the outer end of the movable mold 92 and a plurality of discontinuous wire bodies 10 respectively connected between two air holes 902 in the same fillet groove 903. The plurality of discontinuous wire bodies 10 are sequentially connected in series to the circuit where the electrical component 102 is located. In the three adjacent fillet grooves 903 in the same monitoring group, the two air holes 902 on the middle fillet groove 903 are respectively electrically connected to the opposite magnetic sheets on the other two fillet grooves 903. Since the magnetic sheet on the movable mold 92 is made of aluminum-nickel-cobalt magnetic steel material, it is conductive, so that the plurality of discontinuous wire bodies 10 can be turned on, so that the electrical component 102 is energized, which serves as a reminder for the staff, facilitates the timely execution of the next step, and improves efficiency.

[0032] Among them, according to actual needs, the electrical component 102 can be selected as a small light bulb, a signal light, an alarm or other components that can clearly indicate the status.

[0033] Fig.13As shown, the non-continuous line body 10 is a multi-segment discontinuous conductive sheet structure. In two adjacent segments, one end of one segment is fixedly connected with a downwardly bent spring sheet 101, the downwardly bent spring sheet 101 does not contact with the other end of the segment, and the two overlap in a top view. The upper end of the downwardly bent spring sheet 101 is fixedly connected with a T-shaped contact rod 103, the T-shaped contact rod 103 is made of a conductive material, and the outer surface of the T-shaped contact rod 103 is wrapped with an insulating layer. The T-shaped contact rod 103 movably passes through the other end of the segment and extends above it. When the glue stick 7 falls into the fillet groove 903, it simultaneously contacts multiple T-shaped The touch rod 103 generates an extrusion force, causing it to move downward, thereby causing the lower surface of the top of the T-shaped touch rod 103 to overlap and be connected with the end of the other section. When the glue stick 7 is captured in multiple fillet grooves 903 in the same monitoring unit, the magnetic sheets are electrically connected to each other, so that the electrical component 102 can be turned on, and light, sound, etc. appear. Based on whether the multiple electrical components 102 are turned on, it can be directly determined whether the multiple fillet grooves 903 have captured the glue stick 7. Compared with the first embodiment, the capture of multiple glue sticks 7 is accelerated, and the production speed of the easy-to-tear film is accelerated.

[0034] It is worth noting that a receiving groove is formed on the bottom wall of the fillet groove 903 corresponding to the downwardly bent spring piece 101, so that the downwardly bent spring piece 101 has space for deformation, so that the T-shaped contact rod 103 can contact with an adjacent section of the discontinuous line body 10, so that the whole is conductive.

[0035] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An easily tearable film, characterized in that: The invention comprises a reel (2) and a film body (1) wound around the reel (2), wherein the film body (1) comprises two mutually thermally bonded thin film layers (11), both ends of the reel (2) are sleeved with a limit ring (31), a string elastic rope (32) is fixedly connected between the two limit rings (31), an edge control disc (4) is strung on the string elastic rope (32), the string elastic rope (32) passes through the inner side of the reel (2), the edge control disc (4) comprises two magnetic semicircles (41) and a rubber strip (42) fixedly connected between the two magnetic semicircles (41), the rubber strip (42) is made of elastic material, the string elastic rope (32) movably passes through the rubber strip (42), and the magnetic semicircles (41) are made of hard magnetic material; Both edges of the membrane body (1) are fixedly connected with easy-tear edges (5), and a plurality of evenly distributed glue sticks (7) and a plurality of modified liners (8) are fixedly embedded inside the easy-tear edges (5) and are spaced apart from the plurality of glue sticks (7). The ends of the two easy-tear edges (5) away from the easy-tear edges (5) are serrated, and the angle of the serrated depression is an acute angle, and the angle is rounded, and the radius of the arc is not less than 1 / 5 of the height of the serration.

2. The tearable film according to claim 1, characterized in that: The lowest point of the serrated depression of the easy-tear edge (5) is in contact with the edge of the degradable lining (8), and the degradable lining (8) is a double-layer membrane structure filled with magnetorheological fluid.

3. The tearable film according to claim 1, characterized in that: The glue stick (7) comprises an inner glue stick (71) and an outer glue layer (72) wrapped around the outer layer of the inner glue stick (71); mutually symmetrical (73) are fixedly embedded inside the outer glue layer (72); the (73) is made of magnetic material; the inner glue stick (71) and the outer glue layer (72) are both made of hot-melt material; and the melting point of the outer glue layer (72) is lower than the melting point of the inner glue stick (71).

4. The tearable film according to claim 3, characterized in that: The production method comprises the following steps: S1, passing the bottom film layer (11) through the composite film mold by means of a pulling assembly, the film layer (11) is attached to the upper surface of the fixed mold (91), and the edge of the film layer (11) is made to fit the edge of the fixed mold (91) by means of vacuum adsorption; S2, using air vibration to make the multiple fillet grooves (903) on the fixed mold (91) capture the glue stick (7), then laying the modified lining (8) on the two edges of the fixed mold (91), and finally passing the upper film layer (11) through the composite film mold by using a traction component; S3, controlling the movable mold (92) to press the fixed mold (91) downward so that the two film layers (11) are thermally bonded to each other, and at the same time, the edges of the two film layers (11) are thermally bonded to the modified lining (8) and the plurality of glue sticks (7), and at the same time, the corresponding portions of the modified lining (8) and the glue sticks (7) are thermally bonded to form a plurality of independent individuals that are spaced apart from each other and are respectively connected to the plurality of glue sticks (7); S4, performing a serrated cutting process on the edge of the composite film, thereby forming an easy-tear edge (5) on the edge of the film body (1), forming an easy-tear film, and finally winding the easy-tear film outside the reel (2), thereby completing the production of the easy-tear film; The composite mold comprises a fixed mold (91) and a movable mold (92) that match each other. The front and rear edges of the upper ends of the fixed mold (91) and the movable mold (92) are both provided with a plurality of evenly distributed fillet grooves (903). The glue stick (7) matches the fillet grooves (903). The front and rear edges of the fixed mold (91) and the movable mold (92) are also provided with airways (901) and a plurality of pairs of air holes (902). The plurality of pairs of air holes (902) are respectively connected to the airway (901) and the plurality of fillet grooves (903). The airway (901) is connected to an external air source.

5. The tearable film according to claim 4, characterized in that: In step S3, the temperature of thermal bonding is 150-200° C., and the material of the modified lining (8) and the film layer (11) is the same.

6. The easily tearable film according to claim 5, characterized in that: A plurality of the air holes (902) are fixedly inlaid with magnetic sheets at the edges of the mouths of the fillet grooves (903), the magnetic sheets match with (73), and the magnetic sheets on the movable mold (92) and (73) are both made of aluminum-nickel-cobalt magnetic steel material, and the magnetic sheets on the fixed mold (91) are made of electromagnetic material, and there is a magnetic attraction between the side of the (73) away from the axis of the inner glue rod (71) and the upper surface of the magnetic sheet.

7. The tearable film according to claim 4, characterized in that: In step S2, the specific steps of air-vibrating the glue stick (7) are: S21, controlling the bottom of the movable mold (92) to face upward, and then randomly spreading a plurality of glue sticks (7) on the upward surface of the movable mold (92), and then continuously shaking left and right, so that the plurality of glue sticks (7) enter the fillet groove (903), and the glue sticks (7) facing downward (903) are adsorbed on the magnetic sheet, thereby being positioned; S32, simultaneously filling a small amount of gas into the air passage (901), thereby causing the glue stick (7) that is not attached to the magnetic sheet to vibrate slightly until the magnetic sheet faces downward and is attached to the glue stick to be positioned; S33. When all the fillet grooves (903) have stably absorbed the glue sticks (7), the movable mold (92) is controlled to flip over so that its bottom returns to the bottom, and then it is controlled to approach the fixed mold (91) and contact the fixed mold (91). At this time, the magnetic sheet on the fixed mold (91) is controlled to be energized, so that the multiple glue sticks (7) are electromagnetically absorbed, so that the positions of the multiple glue sticks (7) are shifted, so that the multiple fillet grooves (903) on the fixed mold (91) all capture the glue sticks (7).

8. The easily tearable film according to claim 6, characterized in that: A plurality of monitoring units are mounted on the movable mold (92), wherein one of the monitoring units and a plurality of adjacent fillet grooves (903) form a monitoring group, wherein the monitoring unit comprises an electrical component (102) mounted on the outer end of the movable mold (92) and a plurality of discontinuous wire bodies (10) respectively connected between two air holes (902) in the same fillet groove (903), wherein the plurality of discontinuous wire bodies (10) are sequentially connected in series to a circuit where the electrical component (102) is located, and in three adjacent fillet grooves (903) in the same monitoring group, the two air holes (902) on the middle fillet groove (903) are respectively electrically connected to the magnetic sheets opposite to each other on the other two fillet grooves (903).

9. The easily tearable film according to claim 8, characterized in that: The discontinuous line body (10) is a multi-section discontinuous conductive sheet structure, wherein one of the two adjacent sections has a downwardly bent spring sheet (101) fixedly connected to its end, the downwardly bent spring sheet (101) not in contact with the other section end, and the two overlap in a top-view angle, and the upper end of the downwardly bent spring sheet (101) is fixedly connected to a T-shaped contact rod (103), and the T-shaped contact rod (103) movably passes through the other section end and extends above it.

Images