CN218901426U

CN218901426U - Composite sealing film and packaging box

Info

Publication number: CN218901426U
Application number: CN202223216681.4U
Authority: CN
Inventors: 方志雄; 张海龙; 孙云峰; 张海斌
Original assignee: Inner Mongolia Yili Industrial Group Co Ltd
Current assignee: Inner Mongolia Yili Industrial Group Co Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-04-25
Anticipated expiration: 2032-11-29

Abstract

The embodiment of the disclosure provides a composite sealing film and a packaging box. The filtering membrane of the technical scheme comprises a first membrane body, wherein a plurality of filtering holes are formed in the first membrane body in a penetrating mode, and the aperture of each filtering hole is 0.7-0.9mm. According to the technical scheme, the aperture of the filtering hole is set to be 0.7-0.9mm, so that liquid feed liquid in the yoghurt can be filtered, whey can be quickened, and the preparation speed and the preparation effect of the concentrated yoghurt are improved.

Description

Composite sealing film and packaging box

Technical Field

The disclosure relates to the technical field of packaging, in particular to a composite sealing film and a packaging box.

Background

The concentrated yogurt is rich in proteins, lactobacillus, calcium, carbohydrate, etc., and has effects of lowering blood pressure, reducing weight, promoting digestion, and preventing constipation. At present, the operation of preparing the concentrated yoghurt by a consumer is very simple, after the yoghurt with a special process is stood for a period of time, whey is separated out, the whey is separated from the yoghurt to prepare a beverage of whey type or is directly used, and the rest is the concentrated yoghurt. However, this approach requires a long waiting time and is not effective.

Disclosure of Invention

The embodiment of the disclosure provides a composite sealing film and a packaging box, which are used for solving or relieving one or more technical problems in the prior art.

As a first aspect of embodiments of the present disclosure, embodiments of the present disclosure provide a filtration membrane, including a first membrane body, where a plurality of filtration pores are disposed through the first membrane body, and a pore diameter of each filtration pore is 0.7-0.9mm.

In some possible implementations, the filter holes are uniformly distributed on the first membrane body, and the hole spacing between adjacent filter holes is 4-6mm.

As a second aspect of embodiments of the present disclosure, embodiments of the present disclosure provide a composite sealing membrane, including an inner membrane and an outer membrane, the inner membrane adopting the filtration membrane of the embodiment of the first aspect; the outer membrane comprises a second membrane body, the second membrane body is attached to the first membrane body to cover the filtering holes, and the outer membrane and the inner membrane are arranged in a peelable manner.

In some possible implementations, the peel strength between the first film body and the second film body is 10N or less.

In some possible implementations, the first film body and the second film body are attached by a solvent-free composite mode.

In some possible implementations, the area of the second film body is greater than or equal to the area of the first film body.

In some possible implementations, the inner membrane further includes a first tab bonded to the first membrane body edge; and/or the outer film further comprises a second pull tab, wherein the second pull tab is combined with the edge of the second film body.

In some possible implementations, a first easy-tearing line is formed between the first pull tab and the first film body, the first easy-tearing line is used for enabling the first pull tab to fall off along the first easy-tearing line, the first easy-tearing line is formed by a plurality of first holes arranged at the edges of the first pull tab and the first film body, the aperture of each first hole is 0.7-0.9mm, and the hole spacing of each first hole is 0.9-1.1mm; and/or

The second is drawn the ear with be formed with the second between the second film body and is easily torn the line, the second is easily torn the line and is used for making the second is drawn the ear and is easily torn the line and drop along the second, the second is easily torn the line and is in through a plurality of settings the second is drawn the ear with the second hole at second film body edge forms, the aperture of second hole is 0.7-0.9mm, the hole interval of second hole is 0.9-1.1mm.

As a third aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a packaging box, including a box body and a composite sealing film according to the embodiments of the second aspect, where the box body is formed with an opening, the composite sealing film covers the opening, and an inner film of the composite sealing film is sealed and fixed with the box body to seal an inner cavity of the box body.

In some possible implementations, the inner film and the box body are sealed and fixed in a heat sealing mode, and the heat sealing strength of the inner film and the box body is 30-40N.

The technical scheme of the embodiment of the disclosure can obtain the following beneficial effects: according to the technical scheme, liquid feed liquid in the yoghurt can be filtered through the filtering holes in the first membrane body, so that whey filtering is quickened, and the preparation speed and the preparation effect of the concentrated yoghurt are improved.

The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present disclosure will become apparent by reference to the drawings and the following detailed description.

Drawings

In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily drawn to scale. It is appreciated that these drawings depict only some embodiments according to the disclosure and are not to be considered limiting of its scope.

FIG. 1 is a schematic plan view of a filtration membrane in an embodiment of the disclosure;

FIG. 2 is a schematic view of an inner film side of a composite sealing film according to an embodiment of the present disclosure;

FIG. 3 is a schematic illustration of the outer film side of a composite sealing film according to one embodiment of the present disclosure;

FIG. 4 is a schematic illustration of the composite sealing film outer film uncovering in an embodiment of the present disclosure.

Reference numerals illustrate:

10. a composite sealing film;

100. a filtering membrane; 110. a first film body; 120. a filter hole; 130. a first pull tab; 140. a first easy-to-tear line;

200. an outer membrane; 210. a second film body; 220. a second pull tab; 230. and the second easy-to-tear line.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

As shown in fig. 1, an embodiment of the present disclosure provides a filtering membrane 100, which includes a first membrane body 110, and a plurality of filtering holes 120 are disposed on the first membrane body 110 in a penetrating manner, wherein the aperture of each filtering hole 120 is 0.7-0.9mm.

The shape of the first film body 110 is not limited herein, and the first film body 110 may be any one of a circle, a square, an ellipse, and a polygon, and the first film body 110 may be configured according to an actual application scenario. For example, when the first film body 110 is applied to a box body having a circular opening, the first film body 110 may be set to be circular, and when the first film body 110 is applied to a box body having a square opening, the shape of the first film body 110 may be set to be square.

The material of the first film body 110 may be polyethylene (PP), polypropylene (PP), polyethylene-vinyl acetate (PEVA) or cast polypropylene (CPP) as needed. The material of the first membrane body 110 may be selected according to the material of the packing box body to which the filtering membrane 100 is practically applied.

The number of the filter holes 120 is plural, which means that the number of the filter holes 120 is two or more, the actual number of the filter holes 120 may be set as required, the filter holes 120 may be distributed over the entire area of the first membrane body 110 at intervals, or the filter holes 120 may be provided only in a partial area of the first membrane body 110, and the size of the shape of the filter area formed by the filter holes 120 may be set according to the actual use, which is not limited herein. For example, the filter area is rectangular or circular in shape, and the like, to match the opening size of the package.

Illustratively, the filter aperture 120 is any one of circular, square, polygonal, elliptical in shape. When the filter holes are circular, the diameter of the filter holes 120 is the diameter of the filter holes 120. When the filter hole 120 is square, the aperture of the filter hole 120 represents the distance of the diagonal line of the filter hole 120, i.e., the distance of the opposite vertices. When the filter holes 120 are elliptical, the pore size may represent the major diameter of the ellipse. When the filter hole 120 is a polygon, the aperture of the filter hole 120 represents the distance between diagonal lines of the polygon.

The pore diameter of the filter pores 120 is 0.7-0.9mm, for example, the pore diameter of the filter pores 120 is set to 0.8mm, and the processing error of the pore diameter of the filter pores 120 is + -0.1 mm. The aperture of the filter hole 120 is set to 0.8mm, so that the ranges of both sides of the machining error in aperture manufacturing are equal to 0.1mm, and the manufacturing yield can be improved.

In some of the disclosed embodiments, the filter holes 120 are uniformly distributed on the first membrane body 110, and the hole spacing between adjacent filter holes 120 is 4-6mm. It should be noted that, when the first film body 100 is provided with a plurality of filter holes 120, the adjacent filter holes 120 represent distances between two closest filter holes 120, for example, when the number of filter holes 120 is three, the distances between two of the three filter holes 120 need to satisfy the requirement of 4-6mm.

Illustratively, the filter holes 120 are distributed in a rectangular array at equal intervals along the first direction and the second direction, and the hole pitches of adjacent filter holes 120 mean row pitches in the first direction and column pitches in the second direction, so that the difficulty in processing the hole pitches can be reduced by distributing the filter holes in a rectangular array. The filter holes 120 typically have a hole spacing of 5mm and a deviation of + -1 mm.

The filter hole 120 is formed by punching a hole in the first membrane body 110. For example, the size of the punching needle for punching is set to be 0.8mm according to the requirement, the punching interval is set to be 5mm, and then the punching procedure is executed by the equipment according to the corresponding steps.

As shown in fig. 2 and 3, another embodiment of the present disclosure provides a composite sealing membrane 10, including an inner membrane and an outer membrane 200, wherein the inner membrane may employ the filtering membrane 100 of any embodiment of the first aspect, the outer membrane 200 includes a second membrane body 210, the second membrane body 210 is attached to the first membrane body 110 to cover the filtering holes 120, and the outer membrane 200 and the inner membrane are in a peelable arrangement.

The structure of the inner membrane is described in detail with reference to the filtering membrane 100, and will not be described again. The first film body 110 of the inner film includes a first surface and a second surface opposite to each other, the filter hole 120 penetrates through the first surface and the second surface, the first surface and the inner surface of the second film body 210 of the outer film 200 are attached and fixed in a compound manner, and the second surface can be sealed with the box body at the opening of the package box after the compound sealing film 10 and the package box are assembled. The outer surface of the second film body 210 of the outer film 200 may be printed with corresponding commodity information.

The outer film 200 mainly plays a role in blocking and protecting, and the outer film 200 can be made of an aluminum-plastic composite rolled film material. The outer membrane 200 can protect the inner membrane used for filtering on the one hand, and can play a role in blocking when not in use, namely, the composite sealing membrane 10 can play a role in protecting the content as a sealing membrane when the outer membrane 200 is attached to the inner membrane, so that the effect of protecting and sealing is achieved, and meanwhile, the purpose of effectively filtering whey and retaining concentrated yoghurt essence can be achieved by stripping the outer membrane 200 from the inner membrane and then playing a role of a filter screen through the inner membrane.

As shown in fig. 2 and 3, the second membrane 210 is attached to the first membrane 110 to cover the filter hole 120, and the size of the second membrane 210 is equal to the size of the first membrane 110, that is, the area of the second membrane 210 is equal to the area of the first membrane 110. The second film body 210 is disposed to overlap the first film body 110 in all regions. For example, when the second membrane body 210 and the first membrane body 110 may have a circular structure with equal areas, the second membrane body 210 and the first membrane body 110 are overlapped to form a circular shape with equal areas of the first membrane body 210 and the second membrane body 110, and at this time, the second membrane body 210 covers the entire area of the first membrane body 110, even in the non-filtering area of the first membrane body 110, the first membrane body 110.

In this way, the thickness of the whole area of the composite sealing film 10 can be uniform, so that the situation that the partial area of the composite sealing film 10 is a film due to the unequal sizes of the second film body 210 and the first film body 110 is avoided, and meanwhile, when the outer film 200 and the inner film are composited, the two films can be conveniently composited and aligned. Furthermore, after the composite sealing film 10 and the packaging box are sealed, the appearance effect is better.

The area of the second film body 210 is larger than that of the first film body 110, the second film body 210 not only covers the whole area of the first film body 110, but also covers the area beyond the boundary of the first film body 110. For example, the second film 210 and the first film 110 are both circular film layers, the diameter of the second film 210 is larger than that of the first film 110, and a circular area with the shape equal to that of the second film 210 is formed after the second film 210 and the first film 110 are overlapped. In this way, it can be ensured that all the filter holes 120 of the first membrane body 110 can be covered, and the second membrane body 210 is more convenient to peel off.

The area of the second membrane body 210 is smaller than that of the first membrane body 110, and the second membrane body 210 only covers a partial area of the first membrane body 110, that is, the area of the first membrane body 110 provided with the filtering holes 120 is a partial area of the first membrane body 110, and the size of the second membrane body 210 is equal to that of the filtering area on the first membrane body 110.

The second film body 210 and the first film body 110 are both circular film layers, the diameter of the second film body 210 is smaller than that of the first film body 110, a circular area with the shape equal to that of the first film body 110 is formed after the second film body 210 and the first film body 110 are compositely overlapped, the thickness of the peripheral area of the composite sealing film 10 is one layer, the thickness of the composite sealing film 10 is uneven, and the first film body 110 is inconvenient to peel.

The filtering holes 120 on the first film body 110 can filter the liquid material in the packaging box, so as to realize the function of filtering whey by the product, in order to cooperate to realize the function, the first film body 110 and the second film body 210 need to meet the requirement of low peel strength in the compounding process, and in some possible implementation manners, the peel strength between the first film body 110 and the second film body 210 is less than or equal to 10N. The first film body 110 of the composite sealing film 10 is in sealing connection with the box body of the packaging box, the second film body 210 is in composite lamination with the first film body 110, and the first film body 210 and the second film body 110 are required to be arranged so that the second film body 210 is easy to uncover from the first film body 110, so that the functional requirement of the utility model can be met.

Illustratively, the first film body 110 and the second film body 210 are adhered by a solvent-free composite manner with low pressure or by low-viscosity glue, so that the second film body 210 can be smoothly separated from the first film body 110 when being torn, i.e. the peel strength is less than or equal to 10N.

As shown in fig. 2 and 3, in some embodiments, the inner membrane further includes a first tab 130, and the first tab 130 is coupled to an edge of the first membrane body 110. The first pull tab 130 is mainly used for facilitating the opening of the inner film, and when the inner film is used, the inner film can be torn off from the packaging box by grasping the first pull tab 130 and applying force through the first pull tab 130. The first pull lug 130 and the first film body 110 are integrally formed, and after the composite sealing film 10 and the packaging box are sealed, the first pull lug 130 extends to the outer edge of the packaging box, and the boundary between the first pull lug 130 and the first film body 110 is matched with the outer edge of the packaging box in shape. The inner membrane can be conveniently uncovered by providing the first pull tab 130.

As shown in fig. 2 and 3, in some embodiments, the outer film 200 further includes a second tab 220, and the second tab 220 is coupled to an edge of the second film body 210. The second pull tab 220 is used to facilitate the removal of the outer film 200, and in use, the outer film 200 is removed from the inner film by applying a force through the second pull tab 220 by grasping the second pull tab 220. The second pull tab 220 and the second film 210 are integrally formed, and at least part of the second pull tab 220 extends to the outer edge of the box body of the packaging box.

As shown in fig. 4, it can be understood that the composite sealing film 10 may be provided with both the first tab 130 on the inner film and the second tab 220 on the outer film 200, and by providing the first tab 130 and the second tab 220, the outer film 200 is peeled off by the second tab 220 and the inner film is retained on the package, and the inner film is peeled off by the first tab 130 for the second time so that the contents in the package can be accessed. When the first tab 130 and the second tab 220 are simultaneously disposed on the composite sealing film 10, at least partial areas of the first tab 130 and the second tab 220 are not overlapped, so that a user can conveniently distinguish the first tab 130 and the second tab 220 when using the composite sealing film, and the first tab and the second tab are prevented from being uncovered together.

For example, the first pull tab 130 and the second pull tab 220 may be disposed at two opposite positions where the first film body 110 and the second film body 210 overlap, i.e. the first pull tab 130 and the second pull tab 220 are disposed symmetrically with respect to the central axis, or the first pull tab 130 and the second pull tab 220 may be disposed with different color marks or text marks for distinction.

As shown in fig. 2 and 3, the first tab 130 and the second tab 220 are flange-shaped, the first film body 110 is circular, the second film body 210 is circular, the connecting line between the first film body 110 and the first tab 130 is circular arc, and the connecting line between the second film body 210 and the second tab 220 is circular arc, so that the reliability of the first tab 130 and the second tab 220 can be enhanced. The shapes and sizes of the first pull tab 130 and the second pull tab 220 may be set according to actual needs, and are not limited in the drawings.

In some embodiments, a first tear line 140 is formed between the first tab 130 and the first film body 110, the first tear line 140 is used to enable the first tab 130 to fall off along the first tear line 140, the first tear line 140 is formed by a plurality of first holes disposed at edges of the first tab 130 and the first film body 110, the aperture of the first holes is 0.7-0.9mm, and the hole spacing of the first holes is 0.9-1.1mm. The first tearing line 140 formed between the first tab 130 and the first film body 110 may facilitate the separation of the first tab 130 and the first film body 110, so that the inner film is completely separated from the package.

It should be noted that, the first easy-to-tear line 140 is formed by punching, the aperture of the first hole is 0.7-0.9mm, and the size of the first hole is equal to that of the filtering hole 120, and when the first hole and the hole of the filtering hole 120 can be punched with the same size. During processing, the inner membrane is processed twice, the filter holes 120 are processed first, and then the first holes are processed to form first easy-to-tear lines. When the first hole is processed again, if the filter hole 120 is damaged, the two diameters are the same, a composite process is needed, and the final use effect of the inner membrane is not affected.

In order to ensure that the inner film can be smoothly peeled off when the outer film 200 is peeled off for the first time, a second easy-tearing line 230 is arranged at the joint of the second pull tab 220 area of the outer film 200 and the packaging box, so that the second pull tab 220 falls off along the second easy-tearing line 230 when the outer film 200 is peeled off for the first time, and the inner film is completely kept on the packaging box along with the separation of the outer film 200 and the packaging box.

Illustratively, a second easy-tearing line 230 is formed between the second tab 220 and the second film body 210, and the second easy-tearing line 230 is used to make the second tab 220 drop along the second easy-tearing line 230. The second easy-tearing line 230 is formed by a plurality of second holes arranged at the edges of the second pull tab 220 and the second film body 210, the aperture of the second holes is 0.7-0.9mm, and the hole spacing of the second holes is 0.9-1.1mm.

When in use, the second easy-tearing line 230 is broken, the tearing tension of the second easy-tearing line 230 and the peeling strength between the outer film 200 and the inner film are smaller than the sealing strength between the inner film and the packaging box, so that when the outer film 200 is uncovered, the second pull lug 220 is peeled together with the outer film 200 after being broken along the second easy-tearing line 230, and the inner film remains on the packaging box. The second easy-tearing line 230 forms a second hole by punching on the outer film 200, the aperture of the second hole is equal to the aperture range of the filtering hole, and the distance between the second holes is 0.9-1.1mm, so that the purpose that the second film body 210 can be torn along the second easy-tearing line 230 can be realized.

The processing steps of the composite sealing film 10 are as follows, the inner film is perforated before being compounded, the perforation can be performed in a partial area, the first film body 110 of the inner film is fully perforated, then the first easy-to-tear line is manufactured, and the subsequent printing, compounding, transverse cutting and other processes are performed after the processing is finished.

Another embodiment of the present disclosure provides a packaging box, including a box body and a composite sealing film 10 of any one of the embodiments of the second aspect, the box body is formed with an opening, the composite sealing film 10 covers the opening, and an inner film of the composite sealing film 10 is sealed and fixed with the box body to seal an inner cavity of the box body. The packing carton of this disclosed embodiment, outer membrane are as the main functional layer of sealing membrane as the packing carton, play the effect of the content in the protection box body, and the inner membrane sets up the filtration pore in order to realize preparing concentrated acidophilus milk, and peel strength between outer membrane 200 and the inner membrane needs to satisfy less than or equal to 10N to make the packing carton both can remain traditional sealing membrane and remain the performance of content, can play the filtration effect again simultaneously, can effectively filter whey and remain concentrated acidophilus milk.

It should be noted that the specific structure of the package is not limited herein, and may be set accordingly according to the prior art.

In one disclosed embodiment, the inner film and the case are sealed and secured by heat sealing, and the heat seal strength between the inner film and the case is 30-40N. In the process of heat-sealing the composite sealing film 10 and the box body, the tearing tension of the composite sealing film 10 needs to be ensured to be between 30N and 40N, so that the situation that the inner film is torn before the outer film 200 can not occur in use can be ensured.

Other configurations of the filtering membrane, the composite sealing membrane and the packing box of the present embodiment may be applied to various technical solutions known to those skilled in the art now and in the future, and will not be described in detail herein.

In the description of the present specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present disclosure.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present disclosure, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

In this disclosure, unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.

The above disclosure provides many different embodiments or examples for implementing different structures of the disclosure. The components and arrangements of specific examples are described above in order to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present disclosure. Furthermore, the present disclosure may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

The above is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think of various changes or substitutions within the technical scope of the disclosure, which should be covered in the protection scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A composite sealing film is characterized by comprising

The inner membrane is a filtering membrane, the filtering membrane comprises a first membrane body, a plurality of filtering holes are formed in the first membrane body in a penetrating mode, and the aperture of each filtering hole is 0.7-0.9mm; and

the outer membrane comprises a second membrane body, the second membrane body is attached to the first membrane body to cover the filtering holes, and the outer membrane and the inner membrane are arranged in a peelable manner.

2. The composite sealing film according to claim 1, wherein the filter holes are uniformly distributed on the first film body, and the hole spacing between adjacent filter holes is 4-6mm.

3. The composite sealing film of claim 1, wherein a peel strength between the first film body and the second film body is 10N or less.

4. The composite sealing film according to claim 3, wherein the first film body and the second film body are bonded by a solvent-free composite method.

5. The composite sealing film of claim 1, wherein the second film body has an area that is equal to or greater than the area of the first film body.

6. The composite sealing film according to claim 1, wherein,

the inner film also comprises a first pull tab, and the first pull tab is combined with the edge of the first film body; and/or

The outer film also comprises a second pull tab, and the second pull tab is combined with the edge of the second film body.

7. The composite sealing film according to claim 6, wherein,

a first easy-tearing line is formed between the first pull lug and the first film body and used for enabling the first pull lug to fall off along the first easy-tearing line, the first easy-tearing line is formed by a plurality of first holes arranged at the edges of the first pull lug and the first film body, the aperture of each first hole is 0.7-0.9mm, and the hole spacing of each first hole is 0.9-1.1mm; and/or

The second is drawn the ear with be formed with the second between the second film body and is easily torn the line, is used for making the second is drawn the ear and is easily torn the line and drop along the second, the second is easily torn the line and is formed through a plurality of settings in the second draws the ear with the second hole at second film body edge, the aperture of second hole is 0.7-0.9mm, the hole interval of second hole is 0.9-1.1mm.

8. A packing box is characterized by comprising,

the box body is provided with an opening;

the composite sealing film according to any one of claims 1 to 7, wherein the composite sealing film covers the opening, and an inner film of the composite sealing film is sealed and fixed with the case to seal an inner cavity of the case.

9. The package of claim 8, wherein the inner film and the case are sealed and secured by heat sealing, and the heat sealing strength of the inner film and the case is 30-40N.