Environment-friendly packaging box

Abstract

The utility model belongs to the technical field of packaging materials, and particularly discloses an environment-friendly packaging box which comprises a packaging film and packaging paper, a hot-melt plastic film is arranged between the packaging film and the packaging paper, and the peripheral edge of the packaging film and the peripheral edge of the packaging paper are bonded and fixed through the hot-melt plastic film. A bonding area and a non-bonding area exist between the packaging film and the packaging paper, so that the packaging film and the packaging paper are in a separated state in the non-bonding area. The hot-melt plastic film is placed between the packaging film and the packaging paper, the plastic film can be in a molten state after being heated, the packaging film and the packaging paper can be bonded and fixed after the plastic film in the molten state is cured again, and the peripheral edge of the packaging film and the peripheral edge of the packaging paper are bonded and fixed through the hot-melt plastic film. Therefore, the adhesive is replaced. When the plastic film is bonded and fixed, the thickness and the width of the plastic film are uniform, the plastic film is not influenced by weather and use environment, and the bonding strength is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging materials, in particular to an environmentally friendly packaging box. Background Art

[0002] In order to preserve and prevent the beverage from spoiling, the packaging box includes a packaging paper and a packaging film on the inner surface of the packaging paper. For example, the Chinese utility model patent with the authorization announcement number CN218559796U specifically discloses an environmentally friendly packaging box. The four edges of the packaging film are respectively bonded and fixed to the four edges of the packaging paper, so that the majority of the packaging film and the packaging paper that are directly facing each other are not bonded and fixed. In the portion where the packaging paper is not bonded and fixed to the packaging film, the packaging paper and the packaging film are in a separated state, and a number of first easy-tear lines are cut on the packaging paper, that is, in the subsequent recycling process, it is torn from the first easy-tear lines. Since the first easy-tear lines are in the portion where the packaging paper is not bonded and fixed to the packaging film, and the majority of the portion that is not bonded and fixed does not need to be torn, the packaging film and the packaging paper can be easily separated, thereby facilitating recycling.

[0003] However, in actual application, the adhesive used for bonding and fixing is prone to uneven application, both in thickness and width. Furthermore, the adhesive's bond strength is unstable due to the influence of weather and the operating environment. In some high-temperature conditions, it can easily cause the packaging box to crack, affecting product quality. Furthermore, the adhesive's low bond strength results in a long redevelopment cycle and high development costs. Utility Model Content

[0004] In order to overcome the defects of the prior art, the utility model provides an environmentally friendly packaging box to solve the problems of uneven thickness and width when applying adhesive and unstable bonding strength of the adhesive.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an environmentally friendly packaging box, including a packaging film and packaging paper, a heat-melt plastic film is provided between the packaging film and the packaging paper, and the peripheral edge of the packaging film is bonded and fixed to the peripheral edge of the packaging paper by the heat-melt plastic film, wherein there are a bonding area and a non-bonding area between the packaging film and the packaging paper, so that the packaging film and the packaging paper are in a separated state in the non-bonding area.

[0006] As a further solution, the plastic film is provided with an opening at the position of the non-bonded area, and the width of the bonded area is 5 to 30 mm.

[0007] As a further solution, the plastic film covers the bonding area and the non-bonding area.

[0008] As a further solution, a plurality of first easy-tear lines are cut on the packaging paper at the position of the unbonded area, so that the cavity between the packaging film and the packaging paper communicates with the cutting holes of the first easy-tear lines.

[0009] As a further solution, both ends of the first tear line extend or do not extend to both sides of the wrapping paper, wherein when both ends of the second tear line extend to both sides of the wrapping paper, the second tear line divides the wrapping paper into a first part and a second part.

[0010] As a further solution, a pattern is printed on a side of the packaging paper away from the packaging film.

[0011] As a further solution, several second tear lines are cut on the packaging paper at the position of the unbonded area, so that the cavity between the packaging film and the packaging paper is connected to the cutting holes of the second tear lines, and the second tear lines are distributed along the outline of the pattern.

[0012] As a further solution, the packaging film includes a PE layer, an aluminum foil layer and a PET layer from the inside to the outside, and the PET layer faces the packaging paper.

[0013] As a further solution, four fold lines are provided on the wrapping paper, and an area to be bonded that is not bonded to the wrapping film is left on one side of the plastic film, so that when the wrapping paper is enclosed along the fold lines to form a packaging box, the area to be bonded and the back side of the wrapping paper away from the area to be bonded are fixed by heating and bonding.

[0014] As a preferred solution, the plastic film is made of PE or PP material.

[0015] The present invention has the following beneficial effects: by placing a heat-fusible plastic film between the packaging film and the wrapping paper, the plastic film becomes molten upon heating. After the molten plastic film solidifies again, it can be used to bond the packaging film and the wrapping paper together. The heat-fusible plastic film is then bonded to the wrapping paper along its perimeter, replacing adhesives. During bonding, the plastic film maintains uniform thickness and width, is unaffected by weather and the environment in which it is used, and maintains stable bonding strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of an embodiment of the present utility model;

[0017] Figure 2 for Figure 1 A magnified view of point A in the figure;

[0018] Figure 3 This is a schematic diagram of the back of an embodiment of the utility model;

[0019] Figure 4 A schematic cross-sectional view of an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the plastic film in the embodiment of the utility model (1);

[0021] Figure 6 This is a schematic structural diagram of the plastic film in an embodiment of the present utility model (II).

[0022] In the figure, 1-packaging film, 11-PE layer, 12-aluminum foil layer, 13-PET layer, 2-packaging paper, 21-first easy tear line, 22-first part, 23-second part, 24-second easy tear line, 25-pattern, 26-fold line, 3-plastic film, 31-opening, 4-bonding area, 5-unbonded area, 6-area to be bonded. DETAILED DESCRIPTION

[0023] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0024] It should be noted that if the embodiments of the present invention include descriptions of "first," "second," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of these features.

[0025] As attached Figure 1 、 4As shown, the present invention provides an environmentally friendly packaging box, comprising a packaging film 1 and a packaging paper 2. Before or after the packaging film 1 and the packaging paper 2 are enclosed into the packaging box, the packaging film 1 and the packaging paper 2 are arranged to be directly face to face with each other. A heat-fusible plastic film 3 is placed between the packaging film 1 and the packaging paper 2. The plastic film 3 can be heated to a molten state. After the molten plastic film 3 solidifies again, the packaging film 1 and the packaging paper 2 can be bonded and fixed. The peripheral edge of the packaging film 1 is bonded and fixed to the peripheral edge of the packaging paper 2 by the heat-fusible plastic film 3. In this way, there is a bonding area 4 and an unbonded area 5 between the packaging film 1 and the packaging paper 2. The bonding area 4 is located at the peripheral edge, and the unbonded area 5 is located in the middle, so that the packaging film 1 and the packaging paper 2 are separated in the unbonded area 5. In the process of recycling the waste packaging box in the later stage, the unbonded area 5 does not need to be torn open, and only the bonding area 4 needs to be torn open. Therefore, the packaging film 1 can be easily separated from the packaging paper 2, thereby facilitating recycling.

[0026] The traditional laminating process completely and firmly adheres the packaging film 1 and the packaging paper 2 to form a whole, which is very troublesome when recycling the waste packaging boxes later.

[0027] This utility model places a heat-fusible plastic film 3 (which melts when heated) between a packaging film 1 and a wrapping paper 2. The plastic film 3 becomes molten upon heating. After the molten plastic film 3 solidifies again, it bonds the packaging film 1 and the wrapping paper 2 together. The heat-fusible plastic film 3 bonds the edges of the packaging film 1 to the edges of the wrapping paper 2, replacing adhesives. During bonding, the plastic film 3 maintains uniform thickness and width, is unaffected by weather and the operating environment, and maintains stable bonding strength.

[0028] As one embodiment thereof, as shown in the attached Figure 5 As shown, since the packaging film 1 and wrapping paper 2 do not require bonding in the unbonded area 5, the plastic film 3 has an opening 31 therein, thereby conserving plastic film 3. Furthermore, the width of the bonding area 4 is 5 to 30 mm. Specifically, as shown in the accompanying drawings, the width of the bonding area 4 can be determined based on the type and size of the packaging box being produced. The width is between 5 mm and 30 mm, with a more preferred range of 5 mm to 20 mm. This ensures bonding between the wrapping paper 2 and packaging film 1 while minimizing the use of plastic film 3. This also facilitates subsequent tearing and recycling.

[0029] As another embodiment, as shown in the attached Figure 6As shown, the plastic film 3 covers the adhesive area 4 and the unadhered area 5. Compared with the above embodiment, the plastic film 3 of this embodiment is a whole sheet covering the adhesive area 4 and the unadhered area 5. Since the plastic film 3 does not have an opening 31, the processing equipment is easy to position, which facilitates the production of packaging boxes.

[0030] In addition, as attached Figure 3 As shown, a plurality of first easy-tear lines 21 are cut on the wrapping paper 2 at the positions of the unbonded areas 5, so that the cavity between the packaging film 1 and the wrapping paper 2 is connected to the cut holes of the first easy-tear lines 21. By tearing the first easy-tear lines 21, it is convenient to separate the packaging film 1 and the wrapping paper 2 during the recycling process of the packaging box. It should also be noted that during the process of bonding and fixing the peripheral edges of the packaging film 1 to the peripheral edges of the wrapping paper 2, a cavity exists between the unbonded areas 5 of the packaging film 1 and the wrapping paper 2. Later, when the packaging film 1 and the wrapping paper 2 are folded into a packaging box, the packaging film 1 will bulge, resulting in the bulging occupying the inner cavity volume of the packaging box when the beverage is put into the packaging box. In addition, there is air in the bulged part, which affects the fresh-keeping function of the packaging box. The cavity between the packaging film 1 and the packaging paper 2 is connected to the cutting hole of the first easy tearing line 21. By cutting the first easy tearing line 21, when the beverage is put into the packaging box, under the action of gravity, the beverage pushes the packaging film 1 close to the inner wall of the packaging paper 2, thereby discharging the air in the bulging part from the cutting hole of the first easy tearing line 21.

[0031] In some embodiments, the ends of the first easy tear line 21 may or may not extend to the sides of the wrapping paper 2. When the ends of the first easy tear line 21 extend to the sides of the wrapping paper 2, the first easy tear line 21 divides the wrapping paper 2 into a first portion 22 and a second portion 23. There are two embodiments described above. When the ends of the first easy tear line 21 extend to the sides of the wrapping paper 2, the first easy tear line 21 divides the wrapping paper 2 into a first portion 22 and a second portion 23. Later, when the packaging box is recycled, the wrapping paper 2 is torn into the first portion 22 and the second portion 23 at the first easy tear line 21, making it easier to separate the wrapping paper 2 from the packaging film 1 and facilitate recycling. When the ends of the first easy tear line 21 do not extend to the sides of the wrapping paper 2, the effect is essentially similar to the above embodiments, except that it is relatively difficult to tear the first easy tear line 21.

[0032] In some embodiments, as shown in the accompanying Figure 3As shown, the wrapping paper 2 is printed with a pattern 25 on the side facing away from the packaging film 1, adding a touch of elegance to the packaging box. Several second easy-tear lines 24 are cut into the wrapping paper 2 in the unbonded area 5, allowing the cavity between the packaging film 1 and the wrapping paper 2 to communicate with the cutout holes of the second easy-tear lines 24. The second easy-tear lines 24 also function to evacuate air from the bulging areas of the cavity through the cutout holes of the second easy-tear lines 24. Furthermore, because cutting easy-tear lines into the wrapping paper 2 might detract from its aesthetic appearance, the second easy-tear lines 24 are arranged along the outline of the pattern 25 to conceal them.

[0033] As a preferred embodiment, as shown in the attached Figure 4 As shown, packaging film 1 comprises, from inside to outside, a PE layer 11, an aluminum foil layer 12, and a PET layer 13, with PET layer 13 facing wrapping paper 2. PE layer 11, also known as the polyethylene layer, comes into direct contact with the beverage and offers adaptability, permeability resistance, and excellent heat-sealing properties. Aluminum foil layer 12 primarily serves as a barrier and light shield, protecting the beverage from ultraviolet rays. PET layer 13, also known as the polyethylene terephthalate layer, offers low gas and water vapor permeability, excellent gas, water, oil, and odor barrier properties, and excellent temperature resistance.

[0034] In addition, as attached Figure 3 As shown, four fold lines 26 are provided on the wrapping paper 2, and an area to be bonded 6 that is not bonded to the packaging film 1 is retained on one side of the plastic film 3. The length of the area to be bonded 6 is consistent with the size of the edge of the wrapping paper 2, and the width is 3 to 10 mm. When the wrapping paper 2 is enclosed into a packaging box along the fold line 26, the area to be bonded 6 and the back of the side of the wrapping paper 2 away from the area to be bonded 6 are fixed by heating and bonding, thereby facilitating folding the wrapping paper 2 into a packaging box.

[0035] In a preferred embodiment, the plastic film 3 is made of PE (polyethylene) or PP (polypropylene). PE has a melting point of 100-130°C and offers excellent low-temperature resistance and chemical stability. It is less affected by weather and the operating environment, and provides strong adhesion and good bonding stability. PP has a melting point of 164-170°C and an operating temperature range of -30-140°C.

[0036] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. An environmentally friendly packaging box, comprising a packaging film (1) and a packaging paper (2), characterized in that: A heat-fusible plastic film (3) is provided between the packaging film (1) and the packaging paper (2), and the peripheral edge of the packaging film (1) is bonded and fixed to the peripheral edge of the packaging paper (2) by the heat-fusible plastic film (3), wherein a bonding area (4) and a non-bonding area (5) are provided between the packaging film (1) and the packaging paper (2), so that the packaging film (1) and the packaging paper (2) are in a separated state in the non-bonding area (5).

2. The environmentally friendly packaging box according to claim 1, characterized in that: The plastic film (3) is provided with an opening (31) at the position of the non-bonded area (5), and the width of the bonded area (4) is 5 to 30 mm.

3. The environmentally friendly packaging box according to claim 1, characterized in that: The plastic film (3) covers the bonding area (4) and the non-bonding area (5).

4. The environmentally friendly packaging box according to claim 1, characterized in that: A plurality of first easy-tear lines (21) are cut on the packaging paper (2) at the position of the unbonded area (5), so that the cavity between the packaging film (1) and the packaging paper (2) communicates with the cut holes of the first easy-tear lines (21).

5. The environmentally friendly packaging box according to claim 4, characterized in that: The two ends of the first easy tear line (21) extend or do not extend to the two sides of the wrapping paper (2), wherein when the two ends of the second easy tear line (24) extend to the two sides of the wrapping paper (2), the second easy tear line (24) divides the wrapping paper (2) into a first part (22) and a second part (23).

6. An environmentally friendly packaging box according to any one of claims 1 to 5, characterized in that: A pattern (25) is printed on the side of the packaging paper (2) away from the packaging film (1).

7. The environmentally friendly packaging box according to claim 6, characterized in that: A plurality of second easy-tear lines (24) are cut on the packaging paper (2) at the position of the unbonded area (5), so that the cavity between the packaging film (1) and the packaging paper (2) communicates with the cut holes of the second easy-tear lines (24), and the second easy-tear lines (24) are distributed along the outline of the pattern (25).

8. The environmentally friendly packaging box according to claim 1, characterized in that: The packaging film (1) comprises, from inside to outside, a PE layer (11), an aluminum foil layer (12), and a PET layer (13), wherein the PET layer (13) faces the packaging paper (2).

9. The environmentally friendly packaging box according to claim 1, characterized in that: The wrapping paper (2) is provided with four fold lines (26), and a to-be-bonded area (6) not bonded to the wrapping film (1) is retained on one side of the plastic film (3), so that when the wrapping paper (2) is enclosed along the fold lines (26) to form a packaging box, the to-be-bonded area (6) and the back side of the wrapping paper (2) away from the to-be-bonded area (6) are fixed by heat bonding.

10. The environmentally friendly packaging box according to claim 1, characterized in that: The plastic film (3) is made of PE or PP material.

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