Heat seal support material layer and indentation line assembly

Abstract

The present application relates to a heat-seal support material layer and indentation line assembly in which a heat-seal layer, a buffer layer, a support layer, and an adhesive layer are laminated in this order, the support layer serving as a dimensionally stable core of the entire assembly not only ensures sufficient adhesive strength, but also imparts stability and lasting fatigue resistance to the assembly. The micropore structure in the buffer layer can effectively relieve the impact force, stable pressure distribution is provided for the assembly, and the impact force from the indentation pad is relieved. According to the indentation line assembly, sliding of the indentation pad is effectively prevented, the precision of groove marks of mold pressing paper is remarkably improved, the consolidation and stability of a carton are greatly improved, the appearance is more attractive and elegant, the service life is greatly prolonged, no residual glue is left after use, cleaning is very convenient, and the production efficiency and the product quality are effectively improved.

Description

[Technical field]

[0002] The present application belongs to the field of flat-plate molding technology, and in particular relates to a heat-sealing support material layer and an indentation line assembly. [Background technology]

[0004] In the technical field of packaging and printing, die-cutting machines play a vital role. They are mainly used to perform core process steps such as die-cutting, creasing and hot stamping. Die-cutting machines use steel knives, metal molds and steel wires, and apply precise pressure with the help of embossing plates to accurately roll and cut printed products or cardboard into the required shape. In this process, the die-cutting machine can also simultaneously press out marks or form bending grooves on the printed products, which is crucial for post-printing packaging processing and forming.

[0005] The creasing line assembly is one of the key components in the die-cutting machine. It uses steel wire to form indentations on paper products. These indentations not only facilitate subsequent bending, but also enhance the structural stability of the paper products. Through the creasing line molding process, grooves of uniform thickness can be accurately formed on the product, which are often called creases. The presence of these grooves makes the edge of the cardboard softer, reduces shrinkage, and enhances plasticity, so that it can be easily folded into various shapes, while having consolidation and stability. This not only ensures the accuracy of the product during the manufacturing process, but also ensures its durability and reliability during use, effectively preventing problems such as deformation and breakage.

[0006] In the traditional flat plate die-casting groove process, it is common for workers to manually carve the required grooves directly on the bottom mold using a tool. This method is not only inefficient, but also due to the limitations of manual operation, the width and depth of the grooves are often difficult to reach high-precision standards, and the choice of materials is also limited by their softness and hardness. With the advancement of technology, some advanced processes have begun to use laser engraving technology to produce on the entire steel plate. Although this method improves the accuracy of the grooves, its high cost and low utilization rate often make this solution economically uneconomical, and the laser-engraved templates are usually not reusable, further increasing production costs.

[0007] Existing indentation strips face multiple technical challenges. Their precision control is restricted by multiple factors such as paper thickness, density, hardness and water absorption, which makes it difficult for the actual indentation effect to meet the design expectations. In addition, the durability of the indentation component is insufficient, and the conventional service life is limited. During use, problems such as cracking of the heat sealing layer or breaking of the supporting layer often occur, and frequent replacement is required, which increases production costs and maintenance difficulties. At the same time, the cleaning and maintenance of the indentation line components is also a challenge, especially the residual glue that is difficult to completely remove, which not only affects the subsequent use effect, but may also cause slippage due to residual glue marks, further affecting the indentation accuracy. In addition, the bonding strength of the indentation strip cannot be ignored. If the bonding strength is insufficient, it is easy to slip during the indentation process, which not only affects the indentation accuracy, but may also cause damage to the paper, thereby affecting the overall product quality.

[0008] Therefore, it is necessary to improve the various components related to the indentation assembly to improve the accuracy, lifespan, bonding strength and other performance of the indentation assembly. [Contents of the utility model]

[0010] The purpose of the present application is to provide a heat-sealing support material layer, which can improve the durability of the indentation component, avoid sliding during the indentation process, and on the basis of having sufficient bonding strength, can also facilitate the removal of residual glue. The heat-sealing support material layer includes a heat-sealing layer, a buffer layer, a support layer and an adhesive layer stacked in sequence, and the main materials of the heat-sealing layer, the buffer layer, the support layer and the adhesive layer are high molecular polymers;

[0011] Wherein, the adhesive layer includes a reinforcing skeleton, and the thickness of the adhesive layer ranges from 10 μm to 500 μm;

[0012] The buffer layer includes micropores, the pore size of the micropores ranges from 0.1 μm to 10 μm, and the porosity of the micropores ranges from 10% to 80%.

[0013] In one of the embodiments, a protective layer is further included, and the protective layer is disposed on a side of the adhesive layer away from the supporting layer.

[0014] In one embodiment, the thickness of the support layer ranges from 10 μm to 150 μm;

[0015] In one embodiment, the reinforcing skeleton is a fiber mesh cloth, the fiber mesh cloth has a wire diameter range of 1-500 μm and a mesh size range of (1-50) mm*(1-50) mm.

[0016] In one embodiment, a primer layer or a bonding layer is further included between two adjacent layers.

[0017] The present application further provides an indentation line assembly, which can improve the accuracy of indentation, avoid damage to the indentation object, and improve product quality, comprising the aforementioned heat-sealing support material layer and an indentation pad, wherein the heat-sealing layer of the heat-sealing support material layer is connected to the indentation pad;

[0018] The thickness of the indentation pad is in the range of 0.1 mm to 10 mm. A strip-shaped groove is formed in the indentation pad, and the cross section of the strip-shaped groove is a trapezoid.

[0019] In one of the embodiments, the strip-shaped groove is arranged on the center line of the indentation pad.

[0020] In one of the embodiments, a positioning wedge is further included, wherein the positioning wedge includes a clamping cavity and a protrusion, and the cross-section of the protrusion is the same as the cross-section of the strip-shaped groove.

[0021] In one of the embodiments, the protrusion of the positioning wedge and the strip-shaped groove form a mortise and tenon structure.

[0022] In one embodiment, the trapezoid is an isosceles trapezoid, and the base angle ranges from 15° to 60°.

[0023] Compared with the prior art, the present application has the following beneficial effects: by stacking the heat sealing layer, buffer layer, support layer and adhesive layer in sequence, the support layer is used as the core component to fix the size stability of the entire assembly, providing sufficient bonding strength and stable and lasting fatigue resistance; a certain number of micropores are formed in the buffer layer, which can slow down the impact to provide a stable pressure, and the impact force from the indentation pad in the indentation line assembly is slowed down by a material with a certain resilience; the indentation line assembly including the heat sealing support material can improve the accuracy of the molded paper groove mark by avoiding the sliding of the indentation pad, making the carton more solid and stable, and more beautiful in appearance. At the same time, the service life of the indentation line assembly is improved, there is no residual glue after use, and it is easy to clean.

Brief Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of the heat-sealing support material layer of the present application.

[0026] Figure 2 It is a schematic structural diagram of the heat-sealing support material layer including the protective layer of the present application.

[0027] Figure 3 It is a schematic structural diagram of the indentation line assembly of the present application including a heat-sealing support material layer.

[0028] Figure 4 It is a schematic diagram of the structure of the indentation line assembly including the positioning wedge in the present application. [Specific implementation method]

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] See also Figure 1 , Figure 1 2 is a schematic diagram of the structure of the heat-sealing support material layer of the present application. In one embodiment of the present application, the heat-sealing support material layer 100 comprises a heat-sealing layer 101, a buffer layer 102, a support layer 103 and an adhesive layer 104 stacked in sequence, and the main materials of the heat-sealing layer 101, the buffer layer 102, the support layer 103 and the adhesive layer 104 are high molecular polymers.

[0034] The support layer 103 is composed of one or more compositions, including but not limited to polyethylene terephthalate (PET), polyimide (PI), polyamide compound (PA), polyphenylene sulfide (PPS) and liquid crystal polymer (LCP), etc. The selection of these high-performance materials is intended to ensure that the support layer 103 has excellent mechanical strength, thermal stability and chemical durability.

[0035] In terms of specific form, the support layer 103 is mainly sheet-type or film-type. The sheet-type support layer 103 usually has high flatness and structural stability, and is suitable for scenarios that need to withstand greater pressure and impact. The film-type support layer 103 is thinner and more flexible, and is suitable for application scenarios that require higher precision and delicate operations. By selecting these high-performance materials and appropriate morphological design, the support layer 103 plays a vital role in the indentation line assembly, providing a stable support and reliable performance guarantee for the entire assembly.

[0036] The buffer layer 102 is composed of one or more polymer materials, including but not limited to polyolefins, polystyrene, polyurethane, ethylene vinyl acetate copolymer, ethylene acrylate copolymer, styrene-ethylene polymer, styrene-acrylic polymer, polyvinyl chloride, EPDM rubber and styrene-butadiene rubber. The selection of these materials is intended to ensure that the buffer layer 102 has excellent elasticity, impact resistance and good chemical stability. By combining these materials, the buffer layer 102 plays a vital role in the creasing line assembly. It can absorb and disperse external shocks and vibrations, and protect the support layer 103 and other components from damage. At the same time, the excellent elasticity of the buffer layer 102 can also ensure that during the creasing process, the paper can obtain a uniform and stable pressure distribution, thereby improving the accuracy and consistency of the creasing. In addition, the chemical stability of the buffer layer 102 also enables it to maintain stable performance in a variety of environments, and will not cause performance degradation due to changes in environmental factors. This stability and reliability enable the creasing line assembly to operate stably for a long time in various production environments, improve production efficiency and reduce maintenance costs.

[0037] The heat seal layer 101 is composed of one or more polymer materials, including but not limited to low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), polyolefin elastomer (POE), polyolefin plastomer (POP), ethylene-vinyl acetate copolymer (EVA), styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butylene-styrene block copolymer (SEBS), ethylene-ethyl methacrylate copolymer (EMA), ethylene-ethyl acrylic acid copolymer (EEA), ethylene-methyl methacrylate copolymer (EMMA) and polyurethane. According to specific application requirements and performance requirements, one or more additives such as crosslinking agents, antioxidants, light stabilizers, curing agents, initiators, etc. may be selectively added to optimize the performance of the heat seal layer 101, such as improving heat seal strength, stability, aging resistance, etc. This heat seal layer 101 structure is designed to ensure excellent performance in various use environments.

[0038] The adhesive layer 104 is formed by a pressure-sensitive adhesive having excellent adhesion properties. Specifically, its initial adhesion strength is precisely controlled within the range of 5-50N / 15mm, and this value is precisely measured and strictly screened to ensure that the adhesive layer 104 can exhibit a stable adhesion effect under different environments and application conditions. This layer can be completed by solution coating, emulsion coating, spraying and other processes. The initial adhesion strength refers to the maximum force that the adhesive layer 104 can withstand per unit area after contact and slight pressure is applied. For pressure-sensitive adhesives, the control of initial adhesion strength is crucial, which directly affects the bonding firmness and service life between the adhesive layer 104 and the adherend. By optimizing the formula and processing technology of the pressure-sensitive adhesive, it can be ensured that the adhesive layer 104 has an appropriate initial adhesion strength, which will not be difficult to separate due to excessive adhesion, nor will it be unable to form stable adhesion due to too weak adhesion.

[0039] In addition to the initial adhesive strength, the adhesive layer 104 also has excellent anti-aging, temperature resistance, chemical corrosion resistance and other properties to ensure that the adhesive effect can be maintained in various complex environments. In addition, the thickness, uniformity and flatness of the adhesive layer 104 are also controlled to ensure that it cooperates well with the upper and lower materials to achieve the best indentation effect. As a key part of the indentation line assembly, the performance and quality of the adhesive layer 104 have a decisive influence on the entire indentation process and the quality of the final product. By strictly controlling the initial adhesive strength and other related parameters of the pressure-sensitive adhesive, it can be ensured that the adhesive layer 104 can perform excellent performance in various application environments.

[0040] Among them, the adhesive layer 104 includes a reinforcement skeleton, and the thickness of the adhesive layer 104 ranges from 10μm to 500μm; the adhesive layer 104 is specially introduced with a reinforcement skeleton, and this innovative design is intended to improve the overall strength and stability of the adhesive layer 104. The introduction of the reinforcement skeleton enables the adhesive layer 104 to exhibit better deformation resistance when subjected to external pressure or stretching, thereby ensuring that the indentation line assembly maintains stable performance during long-term use. Regarding the thickness of the adhesive layer 104, after design and multiple experimental verifications, it was finally determined that its thickness range is 10μm to 500μm. The selection of this thickness range takes into account the bonding force between the adhesive layer 104 and the upper and lower layer materials, as well as the pressure transmission performance and ease of operation during the indentation process. An adhesive layer 104 that is too thin may result in insufficient bonding force and affect the indentation effect; while an adhesive layer 104 that is too thick may increase the difficulty of operation, which is not conducive to improving production efficiency. Therefore, we have selected this reasonable thickness range to ensure that the adhesive layer 104 has good processability and ease of use while meeting the performance requirements, thereby improving the performance and stability of the indentation line assembly.

[0041] The buffer layer 102 includes micropores, the pore size of the micropores ranges from 0.1μm to 10μm, and the porosity of the micropores ranges from 10% to 80%. The buffer layer 102 contains a certain number and distribution of micropores, which play a key role in the buffer layer 102. Through its unique structure and performance, it realizes the effective absorption and dispersion of shock and vibration. Specifically, the pore size of the micropores is precisely controlled and ranges from 0.1μm to 10μm. The selection of this pore size range ensures that the micropores can play the best buffering effect under shocks and vibrations of different scales. Too small pore size may lead to insufficient buffering capacity, while too large pore size may reduce the overall strength of the buffer layer 102. In addition, the porosity of the micropores is also regulated and controlled in the range of 10% to 80%. Porosity refers to the proportion of the volume of micropores to the total volume of the buffer layer 102, which directly affects the performance of the buffer layer 102. Appropriate porosity can ensure that the buffer layer 102 has enough space to accommodate and disperse energy when impacted, thereby effectively protecting the support layer 103 and other components from damage.

[0042] See also Figure 2 , Figure 2 1 is a schematic diagram of the structure of the heat-sealing support material layer including a protective layer in the present application. Specifically, the heat-sealing support material layer 100 also includes a protective layer 105, which is arranged on the side of the adhesive layer 104 away from the support layer 103, and the surface in contact with the adhesive layer 104 is a release surface. The protective layer 105 is made of high-quality materials, specifically one of Gewassin paper, polyethylene terephthalate (PET) or biaxially oriented polypropylene (BOPP) with a release agent. The selection of these materials is intended to ensure that the protective layer 105 has excellent wear resistance, scratch resistance and anti-adhesion properties. Further providing the protective layer 105 and forming the release surface is to better preserve and transfer the heat-sealing support material layer 100, to protect the adhesive layer 104, and when used specifically, the protective layer 105 is torn off and adhered to a predetermined surface through the adhesive layer 104. When used specifically, the protective layer 105 is not used as a layer of the heat-sealing support material layer 100.

[0043] Specifically, the thickness of the support layer 103 ranges from 10 μm to 150 μm;

[0044] Specifically, the reinforcing skeleton is a fiber mesh cloth, the wire diameter of the fiber mesh cloth ranges from 1 to 500 μm, and the mesh size ranges from (1 to 50) mm*(1 to 50) mm. The reinforcing skeleton adopts a high-precision fiber mesh cloth, which is woven from high-quality fiber materials and has excellent structural strength and stability. The wire diameter of the fiber mesh cloth is precisely controlled, ranging from 1 μm to 500 μm, ensuring that it has sufficient mechanical properties and can achieve good flexibility and adaptability at the microscopic scale. At the same time, the mesh size of the fiber mesh cloth is also optimized and designed, ranging from (1 to 50) mm * (1 to 50) mm. The mesh structure of this size range not only ensures the overall rigidity and stability of the reinforcing skeleton, but also allows appropriate deformation and displacement to cope with pressure or stretching in different directions and degrees. As a reinforcing skeleton, the fiber mesh cloth plays a vital role in the adhesive layer 104. It can not only enhance the overall strength and durability of the adhesive layer 104, but also effectively disperse and withstand external loads, thereby improving the overall stability and service life of the indentation line assembly.

[0045] Specifically, a primer or bonding layer is further included between two adjacent layers. A primer or bonding layer is specially introduced between two adjacent layers to ensure a firm bond between the layers and excellent performance. The selection and design of this primer or bonding layer has been rigorously tested and verified to ensure that it can form a good interface bond with the adjacent layer materials while improving the stability and durability of the overall structure. The main function of the primer or bonding layer is to enhance the adhesion between adjacent layers and prevent interlayer peeling or separation. It can not only fill the tiny gaps and unevenness between layers and increase the contact area between layers, but also transmit and disperse external loads, effectively protecting the overall structure from damage.

[0046] See also Figure 3 , Figure 3 It is a structural schematic diagram of an indentation line assembly including a heat-sealing support material layer 100. The present application further provides an indentation line assembly, which can improve the indentation accuracy, avoid damage to the indentation object, and improve product quality. The indentation line assembly includes the aforementioned heat-sealing support material layer 100 and an indentation pad 200, and the heat-sealing layer 101 of the heat-sealing support material layer 100 is connected to the indentation pad 200.

[0047] The indentation pad 200 can be composed of one of the following high-performance materials: PVC (polyvinyl chloride) and epoxy resin, phenolic resin, fiberglass, ABS (acrylonitrile-butadiene-styrene) and aluminum alloy, and lightweight steel. The thickness of the indentation pad 200 ranges from 0.1mm to 10mm, and a strip groove is formed in the indentation pad 200, and the cross-section of the strip groove is trapezoidal. The thickness of the indentation pad 200 is precisely controlled, and its range is between 0.1mm and 10mm. This thickness setting is intended to ensure that the indentation pad 200 has sufficient elasticity and cushioning performance when subjected to pressure, while avoiding excessive or insufficient indentation caused by excessive thickness. A strip groove is designed inside the indentation pad 200, and the cross-sectional shape of the groove is trapezoidal, so that it can better contact with paper or other indented materials, and helps to control the depth and shape of the indentation. The groove with a trapezoidal cross-section can also gradually guide the pressure distribution during the indentation process, making the indentation effect more uniform and consistent.

[0048] In addition, the arrangement and spacing of the strip grooves are also selected to ensure that the indentation pad 200 can perform best under different indentation requirements. Whether it is for large-area indentation or fine pattern indentation, this design can provide sufficient support and stability. Through the precise control of the thickness of the indentation pad 200 and the strip grooves, the stability and precision of the indentation pad 200 during the indentation process are successfully achieved.

[0049] Specifically, the strip groove is arranged on the center line of the indentation pad 200. In the design of the indentation pad 200, the strip groove is precisely arranged on the center line of the indentation pad 200. This layout not only ensures the accuracy and stability of the indentation operation, but also significantly improves the indentation efficiency. When the indentation pad 200 is in contact and pressure is applied, the strip groove on the center line can accurately correspond to the indentation position, thereby achieving an accurate and uniform indentation effect. Setting the strip groove on the center line also helps to disperse and balance the stress generated during the indentation process. When paper or other indented materials pass through the indentation pad 200, the groove on the center line can effectively guide the pressure distribution and reduce edge effects and unnecessary material deformation. Not only does it improve the indentation quality, but it also ensures the consistency and repeatability of the indentation process. Whether in large-scale production or fine processes, this layout can provide a stable and reliable indentation effect.

[0050] See also Figure 4 , Figure 4 It is a structural schematic diagram of the indentation line assembly of the present application including a positioning wedge 300. The indentation line assembly also includes a positioning wedge 300. The positioning wedge 300 includes a snap-fit ​​cavity and a protrusion. The cross-section of the protrusion is the same as the cross-section of the strip groove.

[0051] Specifically, the protrusion of the positioning wedge 300 and the strip-shaped groove form a mortise and tenon structure.

[0052] Specifically, the trapezoid is an isosceles trapezoid, and the base angle ranges from 15° to 60°.

[0053] The positioning wedge 300 is a key part of the indentation line assembly. It is finely designed and has important functions. It mainly consists of a clamping cavity and a bump. The cross-sectional shape of the bump is exactly the same as the cross-sectional shape of the strip groove, ensuring a tight fit and stable connection between the positioning wedge 300 and the indentation pad 200. When the bump is inserted into the strip groove, the two form a mortise and tenon structure, which not only enhances the structural strength between the positioning wedge 300 and the indentation pad 200, but also makes the entire indentation process more stable and reliable.

[0054] It is worth noting that the trapezoidal cross section is an isosceles trapezoid, which means that the two sides of the trapezoid are of equal length, thereby ensuring the symmetry and stability of the structure. The range of the bottom angle is controlled to be 15°-60°. The selection of this angle has been calculated and tested to ensure that the trapezoidal cross section has the best mechanical properties and stability when subjected to pressure. The size of the bottom angle not only affects the shape of the trapezoidal cross section, but is also directly related to the contact area and indentation effect between the indentation pad 200 and the positioning wedge 300. An angle that is too large or too small is not conducive to the fixation and peeling of the positioning wedge 300. Therefore, the setting of this angle range is crucial to achieving high-quality indentation effects.

[0055] The specific usage of the indentation line assembly of the present application is as follows: First, accurately measure the corresponding indentation line assembly according to the size of the production drawing. Next, the hollow cavity part of the positioning wedge is accurately snapped onto the steel wire of the mold to form a complete layout. Subsequently, all protective layers of the indentation line assembly are torn off, and the indentation line assembly is compacted onto a flat and high-quality steel plate using a die-stamping plate. After the die-cutting plate is opened, the indentation line assembly will be firmly attached to the steel plate, and the steel wire and positioning wedge will be detached from the indentation line assembly to expose the indentation pad. When performing the indentation operation, place the paper to be processed on the indentation pad, and the die-stamping plate is pressed down again. After precisely controlled pressure and time, a perfect fold line will be formed on the paper. After the indentation is completed, use a hot air blowing device to soften the indentation line assembly so that it can be easily cleaned and removed from the steel plate. Finally, according to production needs, other types of indentation line assemblies are pasted to adapt to different production requirements and pattern designs.

[0056] As mentioned above, the heat sealing layer, buffer layer, support layer, adhesive layer and protective layer are combined in sequence through the lamination process. Among them, the support layer is the core layer of the entire component structure, which not only provides excellent bonding strength, but also exhibits long-lasting fatigue resistance. The buffer layer effectively absorbs and disperses the impact by designing a microporous structure to achieve a stable pressure distribution. These micropores use materials with specific resilience properties to significantly reduce the stress concentration of the indentation line component when it is impacted by the indentation pad.

[0057] It is particularly worth mentioning that the creasing line assembly containing the heat-sealing support material has significantly reduced the possible slippage of the creasing pad during operation through optimized structural design. This improvement not only greatly improves the accuracy of the molded paper groove, but also significantly enhances the consolidation and stability of the carton, thereby greatly improving the appearance quality of the product.

[0058] In addition, the service life of the creasing line component has been significantly extended, and the cleaning work after use has become simpler and more efficient, which completely solves the common problem of residual glue in traditional components. These technical improvements have jointly promoted the technological progress and product upgrades of the packaging and printing industry.

[0059] The above is only a specific implementation of the present application, and any other improvements made based on the concept of the present application are deemed to be within the protection scope of the present application.

Claims

1. A heat-sealing support material layer, characterized in that: It comprises a heat-sealing layer (101), a buffer layer (102), a support layer (103) and an adhesive layer (104) which are stacked in sequence, wherein the main materials of the heat-sealing layer (101), the buffer layer (102), the support layer (103) and the adhesive layer (104) are high molecular polymers; The adhesive layer (104) comprises a reinforcement skeleton, and the thickness of the adhesive layer (104) ranges from 10 μm to 500 μm; The buffer layer (102) comprises micropores, the pore size of the micropores ranges from 0.1 μm to 10 μm, and the porosity of the micropores ranges from 10% to 80%.

2. The heat-sealing support material layer according to claim 1, characterized in that: It also includes a protective layer (105), wherein the protective layer (105) is arranged on a side of the adhesive layer (104) away from the supporting layer (103).

3. The heat-sealing support material layer according to claim 1, characterized in that: The thickness of the support layer (103) ranges from 10 μm to 150 μm.

4. The heat-sealing support material layer according to claim 1, characterized in that: The reinforcing skeleton is a fiber mesh cloth, the wire diameter of the fiber mesh cloth ranges from 1 to 500 μm, and the mesh size ranges from (1 to 50) mm*(1 to 50) mm.

5. The heat-sealing support material layer according to claim 1, characterized in that: A primer layer or a bonding layer is further included between two adjacent layers.

6. A creasing line assembly, characterized in that: It comprises a heat-sealing support material layer (100) and an indentation pad (200) according to any one of claims 1 to 5, wherein the heat-sealing layer (101) of the heat-sealing support material layer (100) is connected to the indentation pad (200); The thickness of the indentation pad (200) ranges from 0.1 mm to 10 mm, and a strip-shaped groove is formed in the indentation pad (200), wherein the cross section of the strip-shaped groove is a trapezoid.

7. The creasing line assembly according to claim 6, characterized in that: The strip-shaped groove is arranged on the center line of the indentation pad (200).

8. The creasing line assembly according to claim 6, characterized in that: It also comprises a positioning wedge (300), the positioning wedge (300) comprising a clamping cavity and a protrusion, the cross section of the protrusion being the same as the cross section of the strip-shaped groove.

9. The creasing line assembly according to claim 8, characterized in that: The protrusion of the positioning wedge (300) and the strip-shaped groove form a mortise and tenon structure.

10. The creasing line assembly according to claim 6, characterized in that: The trapezoid is an isosceles trapezoid, and the base angle ranges from 15° to 60°.

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