PET (Polyethylene Terephthalate) lining packaging film with sinking buffer structure

Abstract

The utility model relates to the technical field of films, in particular to a PET (Polyethylene Terephthalate) lining packaging film with a sinking buffer structure, which adopts the technical scheme that the PET lining packaging film comprises an outer film body and an inner film body, the inner film body is arranged on the inner side of the outer film body, the outer film body comprises a protective film and a bulge, the bulge is arranged on the protective film, and the inner film body is arranged on the inner side of the inner film body. The bulges are used for buffering external impact and preventing skid; the inner film body comprises a buffer film, and bubble films and protruding blocks arranged between the adjacent bubble films are arranged on the buffer film. The arrangement position of the protrusion corresponds to the arrangement position of the bubble film and is matched with the arrangement position of the bubble film. The utility model has the advantages that the stress concentration is reduced, the buffering efficiency and the shock resistance are improved, and the problem that the traditional film is easy to fail in buffering is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of film, concretely to a PET inner lining packaging film with sinking buffer structure. BACKGROUND

[0002] The PET inner lining packaging film is a transparent and tough film layer formed by a biaxial stretching process with polyester (PET) material as a base material, and is widely used in the field of inner packaging of electronic products, precision instruments and fragile objects. Its core function is to prevent the packaged objects from being damaged due to external impact, vibration or friction during transportation or storage through physical isolation and basic buffering effect.

[0003] However, the existing PET inner lining film has significant technical bottlenecks in complex stress scenarios. The core problem is that the traditional planar structure lacks three-dimensional deformation capability, making it difficult to adapt to the contour fitting requirements when irregular objects collide, resulting in local stress concentration and causing the buffer layer to fail easily. At the same time, the vertical stress transmission mechanism of the single material system has a low impact energy absorption rate and a high residual strain rate after cyclic impact, causing permanent damage to the structure. These defects collectively increase the damage rate of precision instrument packaging, failing to meet the upgrading requirements of reliable protection performance in modern logistics. SUMMARY

[0004] The utility model aims at providing a PET inner lining packaging film with sinking buffer structure, which has the advantages of reducing stress concentration and improving buffer efficiency and impact resistance, solving the problem of easy failure of traditional film buffering.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a PET inner lining packaging film with sinking buffer structure, comprising an outer film body and an inner film body, the inner film body is arranged on the inner side of the outer film body, the outer film body comprises a protective film and a protrusion, the protrusion is arranged on the protective film, and the protrusion is used for buffering external impact and preventing sliding;

[0006] The inner film body comprises a buffer film, the buffer film is provided with bubble film and protrusions arranged between adjacent bubble films;

[0007] The protrusion setting position corresponds to the bubble film setting position and cooperates with each other.

[0008] Preferably, the protrusions are distributed in a rectangular array on the protective film, and the protrusions are integrally formed with the protective film.

[0009] In the design, the protrusions are distributed in a rectangular array on the protective film and integrally formed with the protective film, achieving uniform buffer and anti-skid function layout on the protective film, ensuring the integrity and stability of the protective film structure, and enhancing the durability of the protective film.

[0010] Preferably, the bubble film is arranged in a rectangular array on the buffer film, and the bubble film is integrally formed with the buffer film.

[0011] In the design, the bubble film is arranged in a rectangular array on the buffer film and integrally formed with the buffer film, so that the buffer units on the buffer film are regularly and densely arranged, the impact force from different directions can be efficiently resisted, and the firmness of the inner film body structure is ensured.

[0012] Preferably, the protrusion is in the same plane as the top of the bubble film, the protrusion is integrally formed with the protective film, and the end of the protrusion away from the protective film is hot melt connected with the protective film.

[0013] In the design, the protrusion is in the same plane as the top of the bubble film, the protrusion is integrally formed with the protective film and one end is hot melt connected with the protective film, so that a more stable connection relationship between the inner film body and the outer film body is achieved, the buffer and support effect of the local area of the connection between the inner film body and the outer film body is enhanced, and the overall structural strength is improved.

[0014] Preferably, the bubble film adopts a semi-closed structure design and is filled with gas inside to provide elastic support.

[0015] In the design, the bubble film adopts a semi-closed structure design and is filled with gas inside to provide elastic support, so that the excellent elastic buffer performance of the bubble film is achieved, the impact force can be effectively absorbed and dispersed, and the damage of the article is reduced.

[0016] Preferably, the protrusion has a circular cross-sectional shape, and the protrusion is used to increase the anti-skid degree of the surface of the protective film and cooperate with the bubble film to provide the buffer requirement.

[0017] In the design, the protrusion has a circular cross-sectional shape, which is used to increase the anti-skid degree of the surface of the protective film and cooperate with the bubble film to provide the buffer requirement, so that the optimization of the protective film in the anti-skid and buffer functions is achieved, and the anti-skid performance of the protective film is improved through the design of the shape.

[0018] Preferably, the material of the buffer film is the same as that of the bubble film, and the thickness of the buffer film is the same as that of the bubble film.

[0019] In the design, the material of the buffer film is the same as that of the bubble film, and the thickness of the buffer film is the same as that of the bubble film, so that the consistency of the overall performance of the inner film body is achieved, the buffer effect is ensured, the production process is simplified, and the production cost is reduced.

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] The utility model discloses a protrusion on the outer film body and a bubble film and a protrusion on the inner film body are arranged, the protrusion and the bubble film are in position correspondence and cooperate with each other, the effect of effectively dispersing external impact force and reducing stress concentration is achieved.

[0022] The convex can preliminarily buffer external impact, and the anti-skid function thereof also helps to fix the packaged object and reduce additional stress caused by displacement; the bubble film is filled with gas and has good elasticity, and can absorb a large amount of impact energy, and further buffer; the convex enhances the support effect of the local area of the connection between the inner film and the outer film, and improves the overall buffering efficiency and impact resistance, and solves the problem that the traditional film buffer is easy to fail. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a front view structural schematic diagram of the utility model;

[0024] Figure 2 It is a sectional view structural schematic diagram of the utility model;

[0025] Figure 3 It is a sectional view structural schematic diagram of the utility model; Figure 2 It is a sectional view structural schematic diagram of the utility model;

[0026] Figure 4 It is an inner film body explosion structural schematic diagram of the utility model.

[0027] In the drawing: 1, outer film body; 11, protective film; 12, convex; 2, inner film body; 21, buffer film; 22, bubble film; 23, convex block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] Embodiment one

[0030] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the utility model provides an embodiment: a PET inner lining packaging film with sunken buffering structure, including outer film body 1 and inner film body 2, the inner film body 2 is arranged at the inner side of the outer film body 1, the outer film body 1 includes protective film 11 and convex 12, the convex 12 is arranged on the protective film 11, and the convex 12 is used for buffering external impact and anti-skid;

[0031] The inner film body 2 includes buffer film 21, and the buffer film 21 is provided with bubble film 22 and convex block 23 arranged between adjacent bubble films 22.

[0032] The setting position of the convex 12 corresponds to the setting position of the bubble film 22 and cooperates with each other.

[0033] Specifically, by setting the protrusions 12 on the outer film body 1 and the bubble film 22 and the protrusions 23 on the inner film body 2, and the protrusions 12 and the bubble film 22 are positionally corresponding and matched with each other, the effect of effectively dispersing external impact force and reducing stress concentration is achieved.

[0034] The protrusions 12 can preliminarily buffer external impact, and the anti-skid function thereof also helps to fix the packaged objects and reduce additional stress caused by displacement; the bubble film 22 is filled with gas and has good elasticity, which can absorb a large amount of impact energy for further buffering; the protrusions 23 enhance the support effect of the local area of the connection between the inner film and the outer film, and together improve the overall buffering efficiency and impact resistance, solving the problem of easy failure of traditional film buffering.

[0035] Embodiment Two

[0036] In order to achieve more efficient and stable buffering and anti-skid effects and improve the overall performance of the packaging film, as shown in Figure 1 , Figure 2 and Figure 3 , in the embodiment, the protrusions 12 are distributed in a rectangular array on the protective film 11, and the protrusions 12 are integrally formed with the protective film 11.

[0037] Specifically, the protrusions 12 are distributed in a rectangular array on the protective film 11 and integrally formed with the protective film 11, which realizes the uniform layout of the buffering and anti-skid functions on the protective film 11, ensures the integrity and stability of the structure of the protective film 11, and enhances the durability of the protective film 11.

[0038] Further, the cross-sectional shape of the protrusions 12 is circular, and the protrusions 12 are used to increase the anti-skid degree of the surface of the protective film 11 and cooperate with the bubble film 22 to meet the buffering requirement.

[0039] Specifically, the cross-sectional shape of the protrusions 12 is circular, which is used to increase the anti-skid degree of the surface of the protective film 11 and cooperate with the bubble film 22 to meet the buffering requirement, realizes the optimization of the protective film 11 in the anti-skid and buffering functions, and improves the anti-skid performance of the protective film 11 through the design of the shape.

[0040] Embodiment Three

[0041] In order to realize omnidirectional and high-strength buffering protection and a stable connection structure of the inner film and the outer film, as shown in Figure 2 , Figure 3 and Figure 4 , in the embodiment, the bubble film 22 is distributed in a rectangular array on the buffering film 21, and the bubble film 22 is integrally formed with the buffering film 21.

[0042] Specifically, the bubble film 22 is arranged in a rectangular array on the buffer film 21 and is integrally formed with the buffer film 21, so that regular and dense buffer units on the buffer film 21 are achieved, the impact force from different directions can be efficiently resisted, and the firmness of the inner film body 2 structure is ensured.

[0043] Further, the protrusion 23 is in the same plane as the top of the bubble film 22, the protrusion 23 is integrally formed with the protective film 11, and the end of the protrusion 23 away from the protective film 11 is hot melt connected with the protective film 11.

[0044] Specifically, the protrusion 23 is in the same plane as the top of the bubble film 22, the protrusion 23 is integrally formed with the protective film 11 and is hot melt connected with the protective film 11 at one end, so that a more stable connection relationship between the inner film body 2 and the outer film body 1 is achieved, the buffer and support effect of the local area of the connection between the inner film body 2 and the outer film body 1 is enhanced, and the overall structural strength is improved.

[0045] Further, the bubble film 22 adopts a semi-closed structure design and is filled with gas inside for providing elastic support.

[0046] Specifically, the bubble film 22 adopts a semi-closed structure design and is filled with gas inside for providing elastic support, so that excellent elastic buffer performance of the bubble film 22 is achieved, impact force can be effectively absorbed and dispersed, and damage to the article is reduced.

[0047] Further, the material of the buffer film 21 is the same as that of the bubble film 22, and the thickness of the buffer film 21 is the same as that of the bubble film 22.

[0048] Specifically, the material of the buffer film 21 is the same as that of the bubble film 22 and the thickness is the same, so that the consistency of the overall performance of the inner film body 2 is achieved, the buffer effect is ensured, the production process is simplified, and the production cost is reduced.

[0049] In use, according to the design requirements, a mold with a rectangular array distribution circular protruding structure is made, the size and shape of the protrusion of the mold need to accurately meet the design standard, so that the produced protrusion 12 can meet the buffer and anti-skid function requirements. The prepared protective film 11 PET material is put into an extruder, after heating and melting, the protective film 11 is extruded into a specific mold. In the extrusion process, the protruding structure on the mold is used to make the protective film 11 form the protrusion 12 synchronously during extrusion, so that the protrusion 12 is integrally formed with the protective film 11. The temperature, pressure and other parameters in the molding process are stable, so that the protrusion 12 is firmly connected with the protective film 11, and the shape of the protrusion 12 is regular.

[0050] The mold with the semi-closed bubble film structure in rectangular array distribution is designed and made, and the size, shape and array distribution of the semi-closed bubble film mold need to be strictly made according to the design drawing to ensure the size accuracy and distribution uniformity of the bubble film 22. After the prepared PET material for making the buffer film 21 and the bubble film 22 is heated and melted, it is injected into the semi-closed bubble film mold. In the mold, the bubble film 22 structure in rectangular array distribution and integrated with the buffer film 21 is formed during the material cooling and solidification process. After the bubble film 22 is formed, the semi-closed structure bubble film 22 is filled with gas through the hot melting process of the two bubble films 22, so as to ensure its elastic support performance.

[0051] The bump 23 is made from the PET material of the same material as the protective film 11 by mold stamping or other molding process. The size and shape of the bump 23 are ensured to meet the design requirements, and the surface is smooth and smooth. The prepared bump 23 is placed between the adjacent bubble films 22 on the buffer film 21 according to the design position. Then the hot melting equipment is used to hot melt connect the end of the bump 23 away from the protective film 11 with the buffer film 21, so as to ensure firm connection and form a stable inner film body 2 structure.

[0052] The prepared inner film body 2 is placed inside the outer film body 1, and the positions of the protrusions 12 and the bubble films 22 are accurately aligned according to the design requirements, so as to ensure that the positions correspond to each other and can cooperate with each other. According to the actual situation, if it is necessary to further fix the outer film body 1 and the inner film body 2, hot melting connection, adhesive bonding or other suitable fixing methods can be used at the edge to ensure the stability of the overall structure of the packaging film.

[0053] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A PET inner liner packaging film with sinking buffer structure, comprising an outer film body (1) and an inner film body (2), the inner film body (2) is arranged inside the outer film body (1), characterized in that: the outer film body (1) comprises a protective film (11) and a protrusion (12), the protrusion (12) is arranged on the protective film (11), and the protrusion (12) is used for buffering external impact and preventing slipping; the inner film body (2) comprises a buffer film (21), the buffer film (21) is provided with bubble films (22) and protrusions (23) arranged between adjacent bubble films (22); the protrusion (12) is arranged at a position corresponding to the arrangement position of the bubble film (22) and cooperates with each other. The protrusion (12) is arranged in a rectangular array on the protective film (11), and the protrusion (12) is integrally formed with the protective film (11). The bubble film (22) is arranged in a rectangular array on the buffer film (21), and the bubble film (22) is integrally formed with the buffer film (21). The protrusion (23) is in the same plane with the top of the bubble film (22), the protrusion (23) is integrally formed with the protective film (11), and the end of the protrusion (23) away from the protective film (11) is hot melt connected with the protective film (11).

2. The PET lined packaging film having a sink cushioning structure according to claim 1, wherein, The bubble film (22) adopts a semi-closed structure design, has gas filled inside, and is used for providing elastic support.

3. The PET lined packaging film having a sink cushioning structure according to claim 1, wherein, The cross-sectional shape of the protrusion (12) is circular, the protrusion (12) is used to increase the anti-skid degree of the surface of the protective film (11), and cooperates with the bubble film (22) to provide the buffer requirement.

4. The PET lined packaging film having a sink cushioning structure according to claim 1, wherein, The material of the buffer film (21) is the same as that of the bubble film (22), and the thickness of the buffer film (21) is the same as that of the bubble film (22).

5. The PET lined packaging film having a sink cushioning structure according to claim 1, wherein, ​ 6. The PET lined packaging film having a sink cushioning structure according to claim 1, wherein, ​ 7. The PET lined packaging film having a sink cushioning structure according to claim 1, wherein, ​

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