TWI735147B - Plastic wrap and plastic wrap dispenser thereof - Google Patents

Abstract

The present invention relates to a plastic wrap and a plastic wrap dispenser thereof. The plastic wrap comprises a plurality of preset tear structures, and the plurality of preset tear structures are configured on a single edge or two opposite edges of the wrap film, which benefits the plastic wrap to be torn off. In addition, the plastic wrap contains a polymer having linear tearing property, so that when the plastic wrap can be torn straightly. The plastic wrap dispenser includes a box, a cutter, and the plastic wrap of the present invention, wherein cutter of the plastic wrap dispenser is a short cutter or a retractable cutter, which benefits the user from being finger cut when using the plastic dispenser.

Description

Fresh-keeping film and fresh-keeping film box group

The present invention relates to a fresh-keeping film and a fresh-keeping film box group, in particular to a fresh-keeping film with linear tearability and easy to tear, and the fresh-keeping film box group used with it is not easy to cut fingers.

If food is put directly into the refrigerator, it is easy to cause the refrigerator to produce peculiar smell, and may also absorb the taste of the refrigerator, especially starchy foods are easy to absorb the peculiar smell in the refrigerator. In order to keep food fresh, modern people will use plastic wrap to encapsulate the food before putting it in the refrigerator, so that the food will not deteriorate easily and prolong the storage time. Therefore, the cling film is now one of the indispensable kitchen utensils in the family.

The material of the cling film must have the characteristics of heat resistance, ductility and elasticity, among which good heat resistance, in addition to sealing food in the refrigerator, it can also be used for heating in a microwave oven. When encapsulating food utensils such as bowls and plates, the plastic wrap uses extensibility and elasticity to seal the openings of the food utensils to achieve food preservation. The cling film is slightly viscous, so it can be used to encapsulate the openings of food containers, and because of its elasticity, the cling film is not easy to break within a certain range of extension and stretching. However, due to its ductility and elasticity, when using cling film, the cling film is often difficult to tear or tearing unevenly. When the cling film is torn unevenly, it is likely to be deformed or the torn size does not match the size of the utensil and cannot be used. Therefore, a new piece of cling film needs to be torn off, which is a waste of the amount of cling film.

In order to solve the problem that the cling film is difficult to tear, all the cling film boxes currently on the market are equipped with cutting blades, otherwise it is difficult to tear off the cling film for use. However, if the user is not careful when using the plastic wrap box set, it is easy to cut fingers by the cutting blade, and the cuts are often accompanied by uneven tearing of the plastic wrap after tearing off, or curling and unable to use it. The problem of tearing a new piece of plastic wrap.

In view of the above-mentioned problems, the purpose of the present invention is to provide a cling film that is easy to tear, and the cling film box set with it only needs to use a short cutter (ie, a cutting blade) or a cutter that can be pushed out. Effectively improve the convenience of using the cling film, and also improve the safety of the user's hand not easy to cut.

That is, the present invention provides a cling film comprising a plurality of predetermined tearing structures; wherein, the plurality of predetermined tearing structures are arranged on a single side or two relatively parallel sides of the cling film.

In a preferred embodiment, the predetermined tearing structure is a zigzag structure or a linear structure.

In a preferred embodiment, the material of the cling film is a polymer with linear tear characteristics.

In a preferred embodiment, the material of the cling film includes one or any one selected from the group consisting of cyclic block copolymer (CBC), cyclic olefin copolymer (COC) or ionomer.

In a preferred embodiment, the cling film is a multilayer film cling film.

In a preferred embodiment, the multilayer film cling film includes a first film layer, a second film layer and a third film layer; wherein the first film layer and the third film layer are the same material film layer; the first film layer The thickness ratio of the film layer, the second film layer and the third film layer is 1-40:20-98:1-40.

In a preferred embodiment, the fresh-keeping film is a single-layer fresh-keeping film.

Another object of the present invention is to provide a cling film comprising a polymer with linear tear characteristics.

In a preferred embodiment, the polymer material includes one or any one selected from the group consisting of cyclic block copolymers, cyclic olefin copolymers or ionomers.

In a preferred embodiment, the cling film is a multilayer film cling film.

In a preferred embodiment, the multilayer film cling film includes a first film layer, a second film layer and a third film layer; wherein the first film layer and the third film layer are the same material film layer; the first film layer The thickness ratio of the film layer, the second film layer and the third film layer is 1-40:20-98:1-40.

In a preferred embodiment, the fresh-keeping film is a single-layer fresh-keeping film.

Another object of the present invention is to provide a fresh-keeping film box set, which includes a box body, a cutter, and a fresh-keeping film. The box body includes a body and a cover. The system is formed by two side panels, a front panel, a rear panel, and a substrate to form an accommodating space and an opening; the cover has a body connected to the body and covering The first covering structure of the opening and a second covering structure connected to the side of the first covering structure and partially or completely covering the front panel of the main body. The cutter is arranged near the two ends of (a) the lower side of the second covering structure, and (b) the center of the lower side of the second covering structure, wherein the second covering structure is a V-shaped second covering Structure, the cutter is a short cutter, the short cutter is set close to the tip position of the V-shaped second covering structure, (c) near the two ends of the upper side of the front panel of the body, or (d) under the front panel of the body Near the two ends of the side. The cling film contains a polymer with linear tear characteristics.

In a preferred embodiment, the fresh-keeping film box set further includes a pushing structure disposed on one of the side surfaces of the main body; and, when the pushing structure is pressed, the cutter moves to the second Covers the lower side edge of the body structure, and when the pressed pushing structure is released, the cutter will move and retract.

In a preferred embodiment, the cutter is a button cutter.

In a preferred embodiment, the polymer is one or any one selected from the group consisting of cyclic block copolymer (CBC), cyclic olefin copolymer (COC) or ionomer.

In a preferred embodiment, the cling film is a multilayer film cling film.

In a preferred embodiment, the multilayer film cling film includes a first film layer, a second film layer and a third film layer; wherein the first film layer and the third film layer are the same material film layer; the first film layer The thickness ratio of the film layer, the second film layer and the third film layer is 1-40:20-98:1-40.

In a preferred embodiment, the fresh-keeping film is a single-layer fresh-keeping film.

Compared with the prior art, the cling film and the cling film box set of the present invention have the following advantages:

1. The cling film of the present invention has a polymer with linear tearing characteristics, so that the cling film not only has ductility and elasticity, but also has linear tearability, which is conducive to showing a straight line and being torn flatly when it is torn , The tear line is not easy to skew.

2. The present invention also provides a cling film containing a plurality of preset tearing structures, which is beneficial for the cling film to be torn straight and smoothly, and the tear line is not easy to be skewed, so it can reduce the improper tearing of the cling film. The problem of the need to tear the cling film after use is to reduce the amount of cling film used and reduce waste.

3. The cling film box set of the present invention uses the cling film of the present invention. Since the cling film of the present invention has linear tearability, it can be matched with a cling film box set using a short cutter (ie, a short cutting knife). Different from the conventional cling film box set, a long cutting knife is needed to completely tear off the cling film. The short cutter can reduce the risk of cuts on the user's hand and improve the safety in use.

100: plastic wrap

200: plastic wrap

300: Cling film box group

400: plastic wrap box group

500: plastic wrap box group

600: plastic wrap box group

1: Preset tearing structure

2: Box body

201: side panel

202: front panel

21: body

211: accommodating space

212: open

22: Lid

221: First Covering Structure

222: Second Covering Structure

3: cutter

4: Cutter

5: plastic wrap

6: Push the structure

11: The first layer

12: The second film layer

13: The third layer

Fig. 1 is a schematic diagram (1) of the first embodiment of the cling film of the present invention.

Fig. 2 is a schematic diagram (2) of the first embodiment of the cling film of the present invention.

Fig. 3 is a schematic diagram (1) of the second embodiment of the cling film of the present invention.

Fig. 4 is a schematic diagram (2) of the second embodiment of the cling film of the present invention.

Fig. 5 is a schematic diagram (1) of the first embodiment of the plastic wrap box set of the present invention.

Fig. 6 is a schematic diagram (2) of the first embodiment of the fresh-keeping film box set of the present invention.

Fig. 7 is a schematic diagram of a second embodiment of the plastic wrap box set of the present invention.

Fig. 8 is a schematic diagram of a third embodiment of the plastic wrap box set of the present invention.

Fig. 9 is a schematic diagram of a fourth embodiment of the plastic wrap box group of the present invention.

Fig. 10 is a schematic diagram (1) of the operation of the plastic wrap box set of the present invention provided with a pushing structure.

Figure 11 is a schematic diagram (2) of the operation of the plastic wrap box assembly of the present invention with a pushing structure.

Figure 12 is a schematic diagram (3) of the operation of the plastic wrap box assembly of the present invention with a pushing structure.

Figure 13 is a side cross-sectional view of the multilayer cling film of the present invention.

The following embodiments should not be regarded as excessively limiting the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make modifications and changes to the embodiments discussed herein without departing from the spirit or scope of the present invention, and still fall within the scope of the present invention.

The detailed description and technical content of the present invention will now be described in conjunction with the drawings as follows. Furthermore, for the convenience of description, the figures in the present invention are not necessarily drawn according to actual proportions. These figures and their proportions are not intended to limit the scope of the present invention, and are described here first.

Please refer to FIGS. 1 to 2, which are respectively schematic diagrams (1) and (2) of the first embodiment of the cling film of the present invention. In the first embodiment of the cling film of the present invention, the cling film 100 includes a plurality of predetermined tearing structures 1. The predetermined tearing structure 1 referred to herein refers to a non-flat shape preformed on the cling film 100 Shapes, openings or cracks, etc., so that the user can directly force the plastic wrap from the non-flat shape, opening or crack to tear open in a direction parallel to the non-flat shape, opening or crack; wherein, the plurality of presets The tearing structure 1 is arranged on a single side of the cling film. The preset tearing structure 1 can be a zigzag structure or a linear structure; as shown in Figure 1: the preset tearing structure 1 is a zigzag structure, and the user The cling film 100 can be torn along the dotted line in the figure by applying force through the recess of the sawtooth structure; as shown in FIG. 2, the predetermined tearing structure 1 is a linear structure.

Please refer to FIGS. 3 to 4, which are respectively schematic diagrams (1) and (2) of the second embodiment of the cling film of the present invention. In the second embodiment of the cling film of the present invention, the cling film 200 includes a plurality of preset tearing structures 1; wherein, the plurality of preset tearing structures 1 are arranged on two relatively parallel sides of the cling film 200 , The preset tearing structure 1 can be a sawtooth structure or a linear structure; as shown in FIG. 3: the preset tearing structure 1 is a sawtooth structure, and the user can apply force through the recess of the sawtooth structure to make the plastic wrap 100 tears along the dotted line in the figure; as shown in FIG. 4: the preset tear structure 1 is a linear structure.

In the present invention, in the plurality of preset tearing structures 1, the arrangement of the tearing structures 1 may vary in density according to requirements, and the distance between each tearing structure 1 may be 0.1 to 20 cm. And the present invention is not limited to this range, for example: 0.1cm, 0.3cm, 0.5cm, 0.7cm, 1cm, 1.5cm, 2cm, 2.5cm, 3cm, 3.5cm, 4cm, 4.5cm, 5cm, 5.5cm, 6cm , 6.5cm, 7cm, 7.5cm, 8cm, 8.5cm, 9cm, 9.5cm, 10cm, 10.5cm, 11cm, 11.5cm, 12cm, 12.5cm, 13cm, 13.5cm, 14cm, 14.5cm, 15cm, 15.5cm, 16cm , 16.5cm, 17cm, 17.5cm, 18cm, 18.5cm, 19cm, 19.5cm or 20cm, and the present invention is not limited to these.

In the present invention, the cling film 100 or 200 can be a conventional cling film material, such as polyethylene (PE), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC) or polymethylpentene (PMP) Etc., and the present invention is not limited to these; among them, polyethylene (PE) is preferred, such as low-density polyethylene (LDPE) and ultra-low-density polyethylene (ULDPE). Preferably, the cling film 100 or 200 referred to herein contains a polymer with linear tearing characteristics; the "polymer with linear tearing characteristics" as used herein means that the polymer is added to the film, When the film is torn by force, it can have a linear tear incision parallel to the direction of the force applied to the tear; the term "polymer with linear tear characteristics" in this article includes but It is not limited to cyclic block copolymers (CBC), cyclic olefin copolymers (COC) or ionomers. Preferably, the material of the cling film 100 or 200 includes one or any one selected from the group consisting of cyclic block copolymer (CBC), cyclic olefin copolymer (COC) or ionomer. As used herein, "ionomer" refers to an ion-containing polymer. The ion part is usually a carboxylic acid group and is partially or completely neutralized by a base (such as NaOH) to form an ionomer; the ionomer contains sand Lin resin, which is an ionomer produced by DuPont, is a partially or completely neutralized ethylene-acrylic acid or ethylene-methacrylic acid copolymer, but the present invention is not limited to these. In the present invention, the addition amount of the polymer with linear tearing characteristics is 1-50wt%, preferably 10-20wt%.

In the present invention, the fresh-keeping film 100 or 200 may be a multilayer film or a single-layer film. The overall thickness of the cling film 100 or 200 can be 3-50μm, preferably 5-30μm, more preferably 10-20μm, such as 3μm, 5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 40μm, 45μm or 50 μm, and the present invention is not limited to this.

Please refer to FIGS. 5 to 6, which are respectively schematic diagrams (1) and (2) of the first embodiment of the plastic wrap box set of the present invention. In the first embodiment of the fresh-keeping film box group of the present invention, the fresh-keeping film box group 300 includes a box body 2, a cutter 3 and a fresh-keeping film 5. The box 2 includes a main body 21 and a cover 22; wherein the main body 21 is formed by two side panels 201 on the left and right, a front panel 202, a rear panel opposite to the front panel, and a substrate at the bottom. Space 211 and an opening 212; the cover 22 has a connection with the body 21. The side of the rear panel is connected to and covers the first covering structure 221 of the opening 212, and a second covering structure 222 that is connected to the side of the first covering structure 221 and partially or completely covers the front panel 202 of the body 21 . As shown in FIGS. 5 and 6, the cutter 3 is disposed near the two ends of the second covering structure 222, and the short cutter 3 is a serrated blade. The cling film 5 is arranged in the accommodating space 211 of the box body 2. The cling film 5 is the cling film of the present invention, which is a cling film 5 containing a polymer with linear tearing characteristics, or a plurality of The cling film 5 with a predetermined tearing structure, or the cling film 5 with a combination of linear tearing characteristics and a plurality of predetermined tearing structures. In other embodiments, the position of the cutter 3 can also be set near the two ends of the upper side of the front panel 202 or near the two ends of the lower side of the front panel 202 (not shown in the figure).

Please refer to FIG. 7, which is a schematic diagram of the second embodiment of the plastic wrap box set of the present invention. In the second embodiment of the cling film box set of the present invention, the cling film box set 400 includes a box body 2, a cutter 3 and a cling film 5. The box body 2 is the same as the box body 2 of the first embodiment of the cling film box set of the present invention, and has the body 21 (including the accommodating space 211 and the opening 212) and the cover 22 (including the first The covering structure 221 and the second covering structure 222). Wherein, the second covering structure 222 is a V-shaped second covering structure, the cutter 3 is a short cutter, and the short cutter 3 is a serrated blade; the short cutter 3 is arranged close to the V-shaped second covering structure The center of 222, preferably, the short cutter 3 is set at a tip position close to the center of the V-shaped second covering structure 222. The fresh-keeping film 5 is arranged in the accommodating space 212 of the box body 2, and the fresh-keeping film 5 is the fresh-keeping film of the present invention.

Please refer to FIG. 8, which is a schematic diagram of the third embodiment of the plastic wrap box set of the present invention. In the third embodiment of the cling film box set of the present invention, the cling film box set 500 includes a box body 2, a cutter 4, and a cling film 5; in this embodiment, the cutter 4 includes a A circular outer frame and a central connecting strip horizontally arranged in the circular outer frame. The cutting knife is arranged on one side of the central connecting strip, namely Presents a button-shaped button cutter. The box body 2 is the same as the box body 2 of the first embodiment of the fresh-keeping film box set of the present invention. The first covering structure 221 and the second covering structure 222). The shape of the second covering structure 222 is not limited. The figure shows a V-shaped second covering structure. The cutter 4 is arranged at two ends adjacent to the lower side of the second covering structure 222. The fresh-keeping film 5 is arranged in the accommodating space 212 of the box body 2, and the fresh-keeping film 5 is the fresh-keeping film of the present invention.

Please refer to FIG. 9, which is a schematic diagram of a fourth embodiment of the plastic wrap box group of the present invention. In the fourth embodiment of the cling film box set of the present invention, the cling film box set 600 includes a box body 2, a cutter 4, and a cling film 5; in this embodiment, the cutter 4 includes a A circular outer frame and a central connecting strip horizontally arranged in the circular outer frame. The cutting knife is arranged on one side of the central connecting strip, which presents a button-shaped button cutter. The box body 2 is the same as the box body 2 of the first embodiment of the fresh-keeping film box set of the present invention. The first covering structure 221 and the second covering structure 222). The shape of the second covering structure 222 is not limited. The figure shows a V-shaped second covering structure 222. The cutter 4 is set close to the tip of the V-shaped second covering structure 222, preferably The cutter 4 is set at a tip position close to the center of the V-shaped second covering structure 222. The fresh-keeping film 5 is arranged in the accommodating space 212 of the box body 2, and the fresh-keeping film 5 is the fresh-keeping film of the present invention.

Please refer to FIGS. 10 to 12, which are schematic diagrams (1) to (3) of the operation of the plastic wrap box assembly of the present invention with a pushing structure. In a preferred embodiment of the fresh-keeping film of the present invention, as shown in FIG. 10, the fresh-keeping film further includes a pushing structure 6 disposed on one of the sides of the main body 21 of the box body 2, and The cutter 3 is connected. As shown in Figure 11, when the pushing structure 6 is pressed, the cutter 3 moves to the lower edge of the second covering structure 222; preferably, the knife edge of the cutter 3 moves and protrudes to the The lower side edge of the second covering structure 222 facilitates contact with the fresh-keeping film 5 pulled out from the accommodating space. As shown in Figure 12, when the pressed pushing structure 6 is released, the cutter 3 moves and retracts to the lower edge of the second covering structure 222; preferably, the edge of the cutter 3 is parallel The lower side edge of the second covering structure 222 is not protruding. That is, when using the cling film box set of the present invention, the cling film 5 in the accommodating space 211 can be pulled out to the desired use size, and the pushing structure 6 is pressed to move the cutter 3 to the second covering The lower side of the body structure 222 is then torn off the cling film 5 pulled out of the accommodating space 211 by the cutter 3, and the pressed pushing structure 6 is released, and the cutter 3 can be moved and contracted. Back. The pushing structure 6 facilitates the plastic wrap box group to store the cutter 3 on the lower side of the second covering structure 222. When the plastic wrap box group is not in use, the cutter 3 will not be exposed in the box. The outside of the body 2 reduces the risk of being cut by the cutter 3 when the user is not operating the plastic wrap box group.

In the present invention, the cling film can be a single layer or multiple layers; wherein, the film layer of the multilayer film cling film has more than two film layers, and the material of the film layer can be the same or different, and the film layer of each layer The thickness can be the same or different. Preferably, the multilayer film cling film is a three-layer film. For example, as shown in FIG. 13, the multilayer film cling film includes a first film layer 11, a second film layer 12, and a third film layer 13. The film layer 11 and the third film layer 13 are film layers of the same material; the thickness ratio of the first film layer 11, the second film layer 12 and the third film layer 13 is 1-40:20-98:1-40, Preferably it is 5-20:60-90:5-20, for example 5:90:5, 10:80:10, 20:60:20, 10:80:10, 10:80:10 or 20:60: 20, and the present invention is not limited to these, and in a preferred embodiment, the multilayer film cling film can be that the first film layer 11 and the third film layer 13 do not contain a polymer with linear tearing characteristics, and The second film 12 sandwiched between the first film layer 11 and the third film layer 13 has a polymer with linear tear characteristics.

In the present invention, the cutter 3 can be any general cutting and cutting tools, such as serrated blades, cutting knives, etc., and the present invention is not limited to these. The cutter 3 is a short cutter, and the length does not exceed half the length of the lower side of the second covering structure 222.

[Specific Examples]

The following embodiments should not be regarded as excessively limiting the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make modifications and changes to the embodiments discussed herein without departing from the spirit or scope of the present invention, and still fall within the scope of the present invention.

raw material:

●Cyclic block copolymer (CBC) (Taiwan Taiwan Poly ViviOn 8210).

●Cyclic Olefin Copolymer (COC) (Japan Polyplastics 8007F-600).

●Ionomer-Sarlin resin (Surlyn) (U.S. DuPont Surlyn 8920).

●Low-density polyethylene (LDPE) (Taiwan Asia Poly C4100).

●Ultra-low density polyethylene (ULDPE) (Dow 4404G, USA).

Examples 1-1 to 1-6, 2-1 to 2-4 and 3-1 to 3-2 and Comparative Example 1

Use the above-mentioned raw materials to make single-layer film cling film and multilayer film cling film, respectively, to obtain the fresh-keeping of Examples 1-1 to 1-6, 2-1 to 2-4 and 3-1 to 3-2 and Comparative Example 1 Membrane, as shown in Table 1 below. Among them, a single-layer film is a film with a B-layer structure only; a multi-layer film is a film with a three-layer structure, which are A-layer, B-layer, and A-layer in sequence.

Tear test

The cling film obtained in Examples 1-1 to 1-6, 2-1 to 2-4 and 3-1 to 3-2 and Comparative Example 1 and Comparative Example 2 (commercially available PE cling film) were subjected to tear test . First use a cutting knife to cut the edge of the cling film out of the pre-tear opening, and then manually tear the cling film by hand, and test the tearing condition and tear strength of the cling film during transverse tearing (TD) and longitudinal tearing (MD) respectively , The tear strength is measured using ASTM D1922 specifications. Based on the above test results, the results are shown in Table 2 below.

Table 2

As shown in Table 1 and Table 2, Comparative Example 1 only uses low-density polyethylene (LDPE) as the raw material to prepare cling film and the commercially available PE cling film of Comparative Example 2. The condition after tearing is not as good as that of Examples 1-1 to 1. -6, 2-1 to 2-4, and 3-1 to 3-2. Since Examples 1-1 to 1-6, 2-1 to 2-4 and 3-1 to 3-2 used polymers with linear tearing characteristics as raw materials, namely cyclic block copolymers (CBC) (Taiwan Taiwan Poly, ViviOn 8210), Cyclic Olefin Copolymer (COC) (Polyplastics, 8007F-600) and ionomer-Sarlin resin (Surlyn) (U.S. DuPont, Surlyn 8920), regardless of the transverse (TD) tear Splitting or MD tearing can achieve horizontal and vertical tearing effects. Especially when MD tearing, there is no wave mark after tearing, and it is easy to tear. It can be seen that the cling film of the present invention has good tearability, so it can be matched with the cling film box set of the present invention, and a short cutter can be used to complete a linear linear tear, which will not cause the tearing There is a skewed linear tear, so there is no need to use the conventional plastic wrap box set, and a longer cutting blade is required to tear the plastic wrap.

In summary, the cling film of the present invention has a polymer with linear tearing characteristics, so that the cling film has linear tearability, which is beneficial to be straight and smoothly torn when it is torn, and its tear line is not easy to be skewed. , It is beneficial to be torn apart in a straight line and flat, so it can reduce the problem of re-tearing the cling film, thereby reducing the amount of cling film used, that is, reducing the waste of cling film. In addition, the cling film box set of the present invention uses the cling film of the present invention. Because the cling film of the present invention has linear tearability, the cling film box set used in combination can be equipped with a short cutter, which is different from the conventional cling film. The film box set requires a long cutting blade to be able to tear the cling film in a straight line. In addition, the short cutter can reduce the risk of the user's hand being cut and improve the safety in use.

The present invention has been described in detail above. However, what has been described above is only a preferred embodiment of the present invention. It should not be used to limit the scope of implementation of the present invention. Changes and modifications should still fall within the scope of the patent of the present invention.

100: plastic wrap

1: Preset tearing structure

Claims (19)

A cling film comprising a plurality of preset tearing structures; wherein the plurality of preset tearing structures are arranged on a single side of the cling film; wherein the material of the cling film includes one or any one selected from the ring Block copolymer (CBC), cyclic olefin copolymer (COC) or ionomer (ionomer) constitute a group. The cling film according to claim 1, wherein the plurality of preset tearing structures can be further arranged on the other side of the cling film. The fresh-keeping film according to claim 1, wherein the predetermined tearing structure is a sawtooth structure or a linear structure. The cling film according to claim 1, wherein the material of the cling film is a polymer with linear tearing characteristics. The cling film according to claim 1, wherein the cling film is a multilayer film cling film. The cling film according to claim 5, wherein the multilayer film cling film comprises a first film layer, a second film layer and a third film layer; wherein the first film layer and the third film layer are film layers of the same material ; The thickness ratio of the first film layer, the second film layer and the third film layer is 1-40:20-98:1-40. The cling film according to claim 1, wherein the cling film is a single-layer cling film. A cling film comprising a polymer with linear tearing characteristics; wherein the polymer comprises one or any one selected from the group consisting of cyclic block copolymers, cyclic olefin copolymers or ionomers. The cling film according to claim 8, wherein the cling film is a multilayer film cling film. The cling film according to claim 9, wherein the multilayer film cling film comprises a first film layer, a second film layer and a third film layer; wherein the first film layer and the third film layer are film layers of the same material ; The thickness ratio of the first film layer, the second film layer and the third film layer is 1-40:20-98:1-40. The cling film according to claim 8, wherein the cling film is a single-layer cling film. A fresh-keeping film box set includes: a box body, including a body and a cover, wherein the system is formed by two side panels, a front panel, a rear panel, and a substrate to form an accommodating space and an opening; the cover The body has a first covering structure connected to the body and covering the opening, and a second covering structure connected to the side of the first covering structure and partially or fully covering the front panel of the body; a cutter, Arranged near the two ends of the lower side of the second covering structure; a cling film, the cling film comprising a polymer with linear tearing characteristics, wherein the polymer comprises one or any one selected from cyclic block copolymers , Cyclic olefin copolymer or ionomer; and a pushing structure, the pushing structure is arranged on one side of the body; and when the pushing structure is pressed, the cutter moves to the first Two covers the lower side edge of the body structure, and when the pressed pushing structure is released, the cutter moves and retracts. A fresh-keeping film box set includes: a box body, including a body and a cover, wherein the system is formed by two side panels, a front panel, a rear panel, and a substrate to form an accommodating space and an opening; the cover The body has a first covering structure connected to the body and covering the opening, and a second covering structure connected to the side of the first covering structure and partially or fully covering the front panel of the body; a cutter, Set at the center of the lower side of the second covering structure, the second covering structure is a V-shaped second covering structure, the cutter is a short cutter; a cling film, the cling film includes a polymer with linear tear characteristics Where the polymer comprises one or any one selected from the group consisting of cyclic block copolymers, cyclic olefin copolymers or ionomers; and A pushing structure, the pushing structure is arranged on one side of the body; and, when the pushing structure is pressed, the cutter moves to the lower edge of the second covering body structure, and when the pushing structure is pressed After the structure is released, the cutter moves and retracts. A fresh-keeping film box set includes: a box body, including a body and a cover, wherein the system is formed by two side panels, a front panel, a rear panel, and a substrate to form an accommodating space and an opening; the cover The body has a first covering structure connected to the body and covering the opening, and a second covering structure connected to the side of the first covering structure and partially or fully covering the front panel of the body; a cutter, It is arranged near the two ends of the upper side of the front panel of the body; a cling film, the cling film includes a polymer with linear tearing characteristics, wherein the polymer includes one or any one selected from cyclic block copolymers and cyclic olefins A group consisting of copolymers or ionomers; and a pushing structure arranged on one of the sides of the body; and when the pushing structure is pressed, the cutter moves to the second covering structure When the pressed pushing structure is released, the cutter moves and retracts. A fresh-keeping film box set includes: a box body, including a body and a cover, wherein the system is formed by two side panels, a front panel, a rear panel, and a substrate to form an accommodating space and an opening; the cover The body has a first covering structure connected to the body and covering the opening, and a second covering structure connected to the side of the first covering structure and partially or fully covering the front panel of the body; a cutter, Set near the two ends of the lower side of the front panel of the main body, the second covering structure is a V-shaped second covering structure, and the cutter is a short cutter; A cling film comprising a polymer with linear tearing characteristics, wherein the polymer comprises one or any one selected from the group consisting of cyclic block copolymers, cyclic olefin copolymers or ionomers; and A pushing structure, the pushing structure is arranged on one side of the body; and, when the pushing structure is pressed, the cutter moves to the lower edge of the second covering body structure, and when the pushing structure is pressed After the structure is released, the cutter moves and retracts. The fresh-keeping film box set according to any one of claims 12 to 15, wherein the cutter is a button-type cutter. The cling film box set according to any one of claims 12 to 15, wherein the cling film is a multilayer film cling film. Claim 17 A fresh-keeping film box set, wherein the multilayer film fresh-keeping film comprises a first film layer, a second film layer and a third film layer; wherein the first film layer and the third film layer are film layers of the same material; The thickness ratio of the first film layer, the second film layer and the third film layer is 1-40:20-98:1-40. The cling film box set according to any one of claims 12 to 15, wherein the cling film is a single-layer cling film.

Images