Cigarette packaging paper and packaging box using same

Abstract

The utility model discloses cigarette packaging paper. The cigarette packaging paper comprises an inner part, an outer part, a release layer (105) and an adhesive sticker layer (106), wherein the release layer (105) and the adhesive sticker layer (106) are arranged between the inner part and the outer part; the outer part sequentially comprises an outer PE (polyethylene) lamination layer (101), an outer paper layer (102), an outer composite adhesive layer (103) and an outer PET (polyethylene terephthalate) layer (104); the inner part sequentially comprises an inner PET layer (107), an inner composite adhesive layer (108), an inner paper layer (109) and an inner PE lamination layer (110); the release layer (105) is close to the outer PET layer (104), and the adhesive sticker layer (106) is close to the inner PET layer (107). According to the utility model, the outer PE lamination layer and the inner PE lamination layer are respectively laminated on the outermost layer and the innermost layer of the packaging paper to form the double-sided laminated paper, so that the leakproofness and the barrier property of the paper are effectively improved. The pressure relief device is arranged at the bottom of the packaging box, so that the problem that the whole packaging box swells due to the fact that the sealing performance of the packaging box is improved is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette packaging, in particular to a highly moisturizing and flavor-retaining cigarette packaging paper and a packaging box, and more particularly to a cigarette packaging paper and a packaging box using the same. Background Art

[0002] The current hard-pack cigarette packaging usually consists of a trademark paper box body and a box cover, with lining paper inside the box body. This layer of lining paper not only wraps and fixes the shape of the cigarette, but also because of its good barrier properties to gas and moisture, the cigarettes can enjoy multiple protections such as moisture-proof, moisture-preserving, aroma-preserving and light-shielding during storage, thereby significantly reducing the risk of mildew caused by humidity and the loss of aroma. In addition, it is worth mentioning that the BOPP film used in cigarette packaging also plays an important role in moisture-proof, moisture-preserving and aroma-preserving before it is torn, ensuring the long-lasting and excellent quality of cigarettes. However, the current cigarette packaging boxes still have the following problems:

[0003] First of all, as the BOPP film and lining paper of the cigarette box are torn during use, the cigarettes in the box are half-wrapped by the lining paper, and the cigarettes lose the effective barrier to isolate them from the air. After opening and closing many times, the aroma and moisture of the cigarettes will change with the changes in the humidity of the external environment, which will reduce the quality of the cigarettes and greatly reduce the taste of the smoke. In a dry climate, the moisture and aroma of the cigarettes are easy to evaporate, and the irritation and dryness are obvious when smoking. Under humid conditions, the tobacco will absorb moisture from the surrounding air and easily become moldy, causing the smoke to be dull.

[0004] Secondly, the existing cigarette lining paper generally adopts aluminum-plated lining paper produced by composite, transfer or direct plating process, or printed lining paper. Such lining paper is damaged after embossing during packaging and forming. The early damage of the lining paper structure will lead to the following problems: 1. Reduced moisture-proof performance: The aluminum layer structure of the lining paper is the key part of its moisture-proof performance. Once damaged, it will reduce its barrier ability to moisture and humidity, causing cigarettes to be easily affected by moisture during storage and transportation, thereby affecting the taste and quality of cigarettes. 2. Weakened aroma retention performance: The damage to the aluminum layer structure may also affect the aroma retention performance of the lining paper, making the aroma of cigarettes easy to dissipate and unable to maintain the original aroma characteristics for a long time. 3. Reduced mechanical strength: During the embossing process, if the bottom paper structure is damaged, the mechanical strength of the lining paper may be reduced, making it more susceptible to damage or deformation during packaging and transportation, thereby affecting the overall aesthetics and practicality of the packaging. 4. Shorten the shelf life: Due to the reduction of moisture-proof and aroma-preserving properties, the shelf life of cigarettes may be shortened accordingly, increasing the risks of storage and transportation.

[0005] Finally, existing lining paper is usually formed by folding in cigarette packaging boxes. However, this folding method may cause a series of problems during operation, especially regarding the handling of the folded parts of the packaging edge. Since it is often difficult to achieve complete fit at the folded parts, large gaps are formed in these areas. These gaps not only affect the overall aesthetics of the lining paper, but more importantly, they weaken the sealing performance of the lining paper. The reduction in airtightness directly affects the moisture retention and fragrance preservation effects of the lining paper.

[0006] Therefore, in view of the current problem of combined packaging of trademark paper boxes, lining paper and BOPP film, it is necessary to develop a new type of packaging paper and packaging box, combining the shaping functions of trademark paper boxes and lining paper with the moisture-proof, moisture-preserving and fragrance-preserving functions of BOPP film, to form a material with better sealing properties, which can simultaneously have the functions of shaping, sealing, moisture-proof, moisture-preserving, fragrance-preserving and light-shielding.

[0007] In order to solve the above problems, the present utility model is proposed. Utility Model Content

[0008] In order to overcome the problems existing in the background technology, the utility model proposes a highly moisturizing and aroma-preserving cigarette packaging paper and packaging box, which adopts a packaging paper composed of an outer PE coating layer, a white cardboard layer, an outer composite adhesive layer, an outer PET layer, a release layer, a self-adhesive layer, an inner PET layer, an inner composite adhesive layer, a coated paper layer and an inner PE coating layer. The outermost layer and the innermost layer of the packaging paper are respectively coated with an outer PE coating layer and an inner PE coating layer to form a double-sided coated paper, and a PET layer with high barrier properties is used as a substrate, thereby effectively improving the airtightness of the paper. At the same time, the double-sided coated packaging paper can be bonded by ultrasonic heat sealing, that is, the heat generated by ultrasonic vibration on the surface of the PE coating layer is used to soften the surface of the PE coating layer, and then the sealing is achieved by overlapping and pressing under high pressure. The packaging box has a fast molding speed and high molding efficiency, and can effectively eliminate the gaps at the interfaces and corners of the packaging box, thereby effectively improving the sealing of the packaging box and improving the moisturizing and aroma-preserving effect of the packaging box on cigarettes. An opening is provided at the cigarette outlet of the packaging box, and a tearing portion matching the sticking portion is provided on the flip cover, so that the packaging box can be conveniently opened frequently while effectively preventing cigarettes from contacting with the outside air during the period when the packaging box is opened and closed again, which can effectively maintain the stability of the moisture content of the cigarettes and prevent the loss of the flavor components of the cigarettes, thereby improving the smoking experience of consumers. The bottom of the packaging box of the utility model has a pressure relief device, which avoids the problem of bulging of the entire packaging box due to the improvement of the sealing performance of the packaging box.

[0009] The first aspect of the utility model provides a cigarette packaging paper, which comprises an inner part, an outer part, and a release layer 105 and a self-adhesive layer 106 between the inner part and the outer part;

[0010] The outer part includes in sequence: an outer PE (polyethylene) coating layer 101, an outer paper layer 102, an outer composite adhesive layer 103, and an outer PET (polyethylene terephthalate) layer 104;

[0011] The inner part includes in sequence: an inner PET layer 107, an inner composite rubber layer 108, an inner paper layer 109 and an inner PE coating layer 110;

[0012] The release layer 105 is close to the outer PET layer 104 , and the self-adhesive layer 106 is close to the inner PET layer 107 .

[0013] Preferably, the outer PE coating layer has a gram weight of 25-28 g / m 3 , thickness 0.026-0.030mm;

[0014] The inner PE coating layer has a gram weight of 14-16 g / m 3 , thickness 0.014-0.016mm;

[0015] The outer paper layer 102 is a white cardboard layer or a coated paper layer, and the weight of the outer paper layer 102 is 140-160 g / m 3 , thickness 0.130-0.14 mm; preferably, the outer paper layer 102 is a white cardboard layer;

[0016] The inner paper layer 109 is a coated paper layer, and the weight of the inner paper layer 109 is 80-100 g / m 3 , thickness 0.08-0.1mm;

[0017] The thickness of the outer PET layer and the inner PET layer is 0.01-0.012 mm (10-12 μm);

[0018] The release layer 105 is selected from but not limited to PTFE (polytetrafluoroethylene) and PE (polyethylene) coatings, and has a thickness of 0.002-0.004 mm;

[0019] The self-adhesive layer 106 is selected from but not limited to PVC (polyvinyl chloride) self-adhesive and PET (polyethylene terephthalate) self-adhesive, and has a thickness of 0.006-0.007 mm;

[0020] The outer composite adhesive layer 103 and the inner composite adhesive layer 108 are selected from but not limited to polyurethane adhesive and epoxy resin adhesive, and have a thickness of 0.003-0.005 mm;

[0021] The outer PE coating layer 101 and the inner PE coating layer 110 are selected from polyethylene.

[0022] That is to say, the packaging paper of the utility model includes ten layers in total, including from the outside to the inside: an outer PE coating layer 101, an outer paper layer 102, an outer composite adhesive layer 103, an outer PET layer 104, a release layer 105, a self-adhesive layer 106, an inner PET layer 107, an inner composite adhesive layer 108, an inner paper layer 109 and an inner PE coating layer 110. Here, "outside" and "inside" are determined according to the packaging box formed by the packaging paper being in a box body state. When the packaging box formed by the packaging paper is in a box body state, cigarettes are placed in the internal cavity formed by the packaging box, the side of the packaging box close to the cigarettes is the innermost layer of the packaging paper, and the side of the packaging box away from the cigarettes is the outermost layer of the packaging paper.

[0023] In the packaging paper of the utility model, the purpose of selecting and arranging the positions of the materials of each layer is as follows:

[0024] Both white cardboard and coated paper are the forming skeletons of packaging materials, ensuring the forming degree and stiffness of the finished cigarette pack. White cardboard is adjacent to the outer PE coating layer, has higher thickness and hardness, and has better wear resistance, so it is better as an external substrate. Coated paper is adjacent to the inner PE coating layer, which can support the inner PE coating layer and help the inner PET layer to restore its original shape after repeated opening and closing.

[0025] The PET layer has good physical and mechanical properties, and has good barrier properties (especially oxygen barrier properties), creep resistance, fatigue resistance, friction resistance, thermal stability, and dimensional stability. It also has good electrical insulation properties under high temperature and high frequency, which helps to maintain the original shape during ultrasonic welding and helps the cigarette package maintain its original shape after repeated opening and closing. The surface of the PET layer is smooth, which helps the release layer and the self-adhesive layer to adhere. Therefore, the outer PET layer and the inner PET layer can be used as carrier materials for the release layer and the self-adhesive layer, and are also the matrix of the overall packaging material.

[0026] The inner and outer PET layers are attached with composite adhesive layers, which are mainly used to join with paper. That is, the outer composite adhesive layer is used to join the white cardboard layer with the outer PET layer, and the inner composite adhesive layer is used to join the coated paper layer with the inner PET layer.

[0027] The inner part and the outer part are separated by a release layer and a self-adhesive layer, wherein the self-adhesive layer is closer to the inner part and has a higher stickiness. The release layer is a release agent coating, which mainly isolates sticky objects, can play the role of smoothing the film surface and effectively prevent the migration of the adhesive layer. In addition, the release layer also ensures that the tearing part can be repeatedly adhered to the self-adhesive layer on the sticking part after being torn off. In this application, the release layer separates the self-adhesive layer from the outer PET layer. The release layer is adjacent to the outer PET layer, and the self-adhesive layer is adjacent to the inner PET layer.

[0028] The innermost and outermost layers of the packaging paper are PE coatings, which have strong water resistance, oil resistance, and high barrier properties, and can maintain the stability of the packaging paper. At the same time, they can be melt-bonded under the conditions of ultrasonic welding, achieving a good sealing effect at the joints, which should be coordinated with the advantages of ultrasonic welding in the packaging box forming method of the utility model. In addition, the outer PE coating is thicker than the inner PE coating layer to meet the requirements of box sealing and good barrier properties; the inner PE coating layer can effectively protect the internal cigarettes from the influence of the outer paper and the external environment.

[0029] The second aspect of the utility model provides a cigarette packaging box using the cigarette packaging paper of the first aspect of the utility model. When the packaging box is in a box body state, the packaging box comprises: a top cover 2, a front side wall 3, a rear side wall 4, a left side wall 5, a right side wall 6, and a bottom plate 7;

[0030] The top cover 2 and the front side wall 3 are provided with communicating openings as a cigarette taking area 1 of the packaging box, and the cigarette taking area 1 is provided with a flip cover 9 matching the openings on the top cover 2 and the front side wall 3;

[0031] The flip cover 9 is rotatably connected to the upper end of the rear side wall 4 via a fold, and a fold corresponding to the fold between the top cover 2 and the front side wall 3 is provided on the flip cover 9;

[0032] After the flip cover 9 is reset, the packaging box is in a rectangular state, and the cigarettes are placed in the internal cavity formed by the packaging box; the side of the packaging box close to the cigarettes is the innermost layer of the packaging paper, and the innermost layer of the packaging paper is the inner PE coating layer 110; the side of the packaging box away from the cigarettes is the outermost layer of the packaging paper, and the outermost layer of the packaging paper is the outer PE coating layer 101.

[0033] Preferably, the top cover 2 and the front side wall 3 at the cigarette taking area 1 of the packaging box extend toward the cigarette taking area 1 with a sticking portion 201, and the packaging paper at the sticking portion 201 includes a self-adhesive layer 106, an inner PET layer 107, an inner composite adhesive layer 108, an inner paper layer 109 and an inner PE coating layer 110;

[0034] The flip cover 9 is provided with a tearing portion 901 matching the shape of the sticking portion 201, and the packaging paper at the tearing portion 901 includes an outer PE coating layer 101, an outer paper layer 102, an outer composite adhesive layer 103, an outer PET layer 104 and a release layer 105;

[0035] The cigarette taking area 1 is located inside the sticking portion 201 to form a cigarette taking port 202;

[0036] The side of the adhesive portion 201 close to the tear portion 901 is the self-adhesive layer 106, and the side of the tear portion 901 close to the adhesive portion 201 is the release layer 105. The tear portion 901 and the adhesive portion 201 are repeatedly adhered and torn by repeatedly adhering and tearing the release layer 105 and the self-adhesive layer 106, thereby achieving repeated adhering and tearing of the flip cover 9 and the cigarette taking area 1, and further achieving the closing and exposure of the cigarette taking port 202.

[0037] That is to say, in order to facilitate taking out cigarettes, an opening is provided at the connection between the top cover 2 and the front side wall 3. Before the opening is provided, the top cover 2 and the front side wall 3 are both ten-layer packaging paper in the utility model. The top cover 2 and the front side wall 3 are partially cut by a cutter to form a cigarette taking area 1 and a flip cover 9. The cigarette taking area 1 has a sticking portion 201, and the flip cover 9 has a tearing portion 901. The side of the sticking portion 201 close to the tearing portion 901 is the self-adhesive layer 106, and the side of the tearing portion 901 close to the sticking portion 201 is the release layer 105. Figure 6 As shown, firstly, the cutter is used to cut only the release layer 105 in terms of layers, so that the top cover 2 and the front side wall 3 are divided into the cigarette taking area 1 with the adhesive portion 201 and the flip cover 9 with the tearing portion 901, the adhesive portion 201 is the inner portion of the wrapping paper and the adhesive layer 106, and the tearing portion 901 is the outer portion of the wrapping paper and the release layer 105, and then the cutter is used to cut all the wrapping paper in terms of layers again to form a cigarette taking port 202, and all ten layers of the wrapping paper at the cigarette taking port 202 are located on the flip cover 9. The specific depth of the cutter is adjusted according to the different thicknesses of each layer in actual conditions.

[0038] Preferably, the orthographic projections of the cigarette outlet 202 on the top cover 2 and the front side wall 3 are both rectangular, and the rectangle includes a right-angled rectangle or a chamfered rectangle.

[0039] Preferably, the shapes of the edges of the cigarette access area 1 and the flip cover 9 can be arbitrarily selected according to actual conditions. Preferably, the shapes of the edges of the cigarette access area 1 and the flip cover 9 are presented as two parallel straight lines on the top cover 2, and are presented as arcs, trapezoids, or a combination of straight lines and curves on the front side wall 3. In addition, it can also be any shape that is convenient for cutting.

[0040] Preferably, the bottom plate 7 is provided with a pressure relief device, the pressure relief device comprises a pressure relief hole 701, and the pressure relief hole 701 is covered with a pressure relief sheet 702;

[0041] The diameter of the pressure relief hole 701 is 0.7-0.8 cm; the material of the pressure relief sheet 702 is latex.

[0042] The pressure relief sheet 702 is pasted as follows: a small hole is designed in the middle of the bottom packaging material, and the pressure relief sheet is covered on the small hole by gluing and heating the gluing on the back. The outer ring of the pressure relief sheet has a circular gluing area, which is pasted inside the circular hole at the bottom of the packaging box. Figure 12-13 Since the pressure relief sheet 702 is more likely to deform after being stressed than the packaging paper, when the gas pressure inside the package increases, the pressure will be concentrated on the pressure relief sheet 702 area, and the pressure relief sheet 702 will bulge, thereby avoiding the bulging problem of the entire packaging box. The pressure relief sheet 702 is located at the bottom of the packaging box and is relatively difficult to be noticed by consumers, which can minimize the bulging problem of the packaging box. In addition, since the pressure relief sheet 702 is more susceptible to deformation than the packaging material, the pressure relief sheet 702 is not easy to rupture.

[0043] The unfolded state of the packaging box includes two situations. In the first situation, the bottom plate 7 is connected to the rear side wall 4, and the bottom plate 7 is attached to the front side wall 3, the rear side wall 4, and the right side wall 6 through the folding plate. In the second situation, the bottom plate 7 is separate, and the bottom plate 7 is attached to the front side wall 3, the rear side wall 4, the left side wall 5, and the right side wall 6 through the folding plate.

[0044] Preferably, when the packaging box is in an unfolded state, the bottom plate 7 is connected to the rear side wall 4, and the packaging box comprises: a top cover 2, a front side wall 3, a rear side wall 4, a left side wall 5, and a right side wall 6 extending vertically in the front, rear, left, and right directions with the top cover 2 as the center, and the bottom plate 7 extending vertically from an end of the rear side wall 4 away from the top cover 2;

[0045] A fold is provided at the connection between the top cover 2 and the front side wall 3, the rear side wall 4, the left side wall 5, and the right side wall 6, and a fold is provided at the connection between the rear side wall 4 and the bottom plate 7. The left and right sides of the front side wall 3 and the rear side wall 4 extend outward to form a first folding plate 8, and the first folding plate 8 on the left side is provided with a fold that is at an angle of 45° with the left side wall 5, and the first folding plate 8 on the right side is provided with a fold that is at an angle of 45° with the right side wall 6; the front side wall 3, the left side wall 5, and the right side wall 6 extend outward at one end away from the top cover 2 to form a second folding plate 10, and the front end, left end, and right end of the bottom plate 7 extend outward to form a third folding plate 11 respectively, and the third folding plate 11 on the left side and the third folding plate 11 on the right side are the same width as the bottom plate 7 and are just not connected to the first folding plates 8 on the left and right sides of the rear side wall 4.

[0046] When the packaging box is in a box body state, the first folding plate 8 on the left side is in contact with the left side wall 5, and the first folding plate 8 on the right side is in contact with the right side wall 6; the second folding plate 10 is folded inward and in contact with the bottom plate 7, and the third folding plate 11 is folded upward and in contact with the front side wall 3, the left side wall 5, and the right side wall 6.

[0047] Preferably, when the packaging box is in an unfolded state, the bottom plate 7 is separate, and the packaging box comprises: a top cover 2, a bottom plate 7, and the front side wall 3, the rear side wall 4, the left side wall 5, and the right side wall 6 extending vertically in the front, rear, left, and right directions with the top cover 2 as the center;

[0048] A fold is provided at the connection between the top cover 2 and the front side wall 3, the rear side wall 4, the left side wall 5, and the right side wall 6. The left and right sides of the front side wall 3 and the rear side wall 4 extend outward to form a first folding plate 8. The front and rear sides of the left side wall 5 and the right side wall 6 extend outward to form a fourth folding plate 12. The first folding plate 8 on the left side is provided with a fold that is 45° with the left side wall 5. The first folding plate 8 on the right side is provided with a fold that is 45° with the right side wall 6. The front, rear, left, and right sides of the bottom plate 7 extend outward to form a fifth folding plate 13. There is a fold between the bottom plate 7 and the fifth folding plate 13.

[0049] When the packaging box is in a box body state, the first folding plate 8 on the left side is in contact with the fourth folding plate 12 on the left side, and the first folding plate 8 on the right side is in contact with the fourth folding plate 12 on the right side, the fifth folding plate 13 on the front side is in contact with the front side wall 3, the fifth folding plate 13 on the rear side is in contact with the rear side wall 4, the fifth folding plate 13 on the left side is in contact with the left side wall 5, and the fifth folding plate 13 on the right side is in contact with the right side wall 6.

[0050] The third aspect of the utility model provides a cigarette packaging box forming method according to the second aspect of the utility model, which comprises the following steps:

[0051] S1, cutting the wrapping paper according to the unfolded diagram of the packaging box, and setting folds on the wrapping paper; the unfolded state of the packaging box includes two situations, the first situation is that the bottom plate 7 is connected to the rear side wall 4, and the bottom plate 7 is attached to the front side wall 3, the rear side wall 4, and the right side wall 6 through the folding plate. The second situation is that the bottom plate 7 is separate, and the bottom plate 7 is attached to the front side wall 3, the rear side wall 4, the left side wall 5, and the right side wall 6 through the folding plate. In this step, the wrapping paper is cut according to the actual situation.

[0052] S2, forming the cigarette taking area 1 and the flip cover 9 on the top cover 2 and the front side wall 3; that is, in order to facilitate taking out cigarettes, an opening is set at the connection between the top cover 2 and the front side wall 3. Before the opening is set, the top cover 2 and the front side wall 3 are both ten-layer wrapping paper in the utility model. The top cover 2 and the front side wall 3 are partially cut open by a cutter to form the cigarette taking area 1 and the flip cover 9. Figure 6 As shown, firstly, the cutting knife is used to cut only the release layer 105 in layers, so that the top cover 2 and the front side wall 3 are divided into the cigarette taking area 1 with the sticking portion 201 and the flip cover 9 with the tearing portion 901, the sticking portion 201 is the inner portion of the wrapping paper and the self-adhesive layer 106, the tearing portion 901 is the outer portion of the wrapping paper and the release layer 105, and then the cutting knife is used to cut all the wrapping paper in layers again to form a cigarette taking port 202, and the ten layers of the wrapping paper at the cigarette taking port 202 are all located on the flip cover 9.

[0053] S3, changing the packaging box from the unfolded state to the box body state; usually, the packaging box is changed from the unfolded state to the box body state by folding.

[0054] S4, by ultrasonic welding, the PE coating is melt-bonded under pressure and heating conditions, so as to bond the front side wall 3, the rear side wall 4, the left side wall 5, the right side wall 6, and the bottom plate 7. Different unfolded views will form different connections after folding, and in this step, the existing connections are bonded according to the actual situation.

[0055] Preferably, the conditions for ultrasonic welding in step S2 are: ultrasonic welding frequency is 30-40 kHz, more preferably 40 kHz, increased pressure is 0.5-0.8 MPa, more preferably 0.8 MPa, amplitude is 1 mm, and holding time is 10 s.

[0056] Preferably, the bonding method is ultrasonic welding. Under the high-frequency vibration of the ultrasonic welding machine, a certain amount of heat is generated, and the heat causes the PE coating layer to melt and stick together, and then pressurization is used to make the bonding surface of the box more firm.

[0057] In order to match the high sealing and high barrier packaging paper of the utility model, the die-cutting size of the packaging box can be adjusted according to actual conditions.

[0058] Compared with the prior art, the utility model has the following beneficial effects:

[0059] 1. The packaging paper of the utility model comprises, from outside to inside, an outer PE coating layer, a white cardboard layer, an outer composite adhesive layer, an outer PET layer, a release layer, a self-adhesive layer, an inner PET layer, an inner composite adhesive layer, a coated paper layer and an inner PE coating layer. The outermost layer and the innermost layer of the packaging paper are coated with an outer PE coating layer and an inner PE coating layer to form a double-sided coated paper, and the PET layer with high barrier properties is used as the base material, which effectively improves the airtightness of the paper, thereby improving the sealing, moisture-proof, moisturizing, aroma-preserving effect and barrier property of the packaging paper. Both the white cardboard and the coated paper belong to the forming skeleton of the packaging material, which ensures the forming degree and stiffness of the finished cigarette package, as well as the light-shielding effect. The packaging material of the utility model can simultaneously have the functions of shaping, sealing, moisture-proof, moisturizing, aroma-preserving and light-shielding.

[0060] 2. Precisely because the inner and outer layers of the packaging paper of the utility model are respectively the inner PE coating layer and the outer PE coating layer, after the packaging paper of the utility model is folded into a packaging box, the PE coating can be further melt-bonded under pressurized and heated conditions by ultrasonic welding. Specifically, the heat generated by ultrasonic vibration on the surface of the PE coating layer is used to soften the surface of the PE coating layer, and then the layers are overlapped and pressed under high pressure to achieve sealing. The packaging box has a fast molding speed and high molding efficiency, and can effectively eliminate the gaps at the interfaces and corners of the packaging box, thereby effectively improving the sealing of the packaging box and improving the moisturizing and aroma-preserving effect of the packaging box on cigarettes.

[0061] 3. In order to facilitate the removal of cigarettes, the utility model provides an opening at the connection between the top cover 2 and the front side wall 3. Before the opening is provided, the top cover 2 and the front side wall 3 are both ten-layer packaging paper in the utility model. The top cover 2 and part of the front side wall 3 are cut by a cutter to form a cigarette taking area 1 and a flip cover 9. The cigarette taking area 1 is provided with a sticking portion 201, and the flip cover 9 is provided with a tearing portion 901. The side of the sticking portion 201 close to the tearing portion 901 is a self-adhesive layer 106, and the side of the tearing portion 901 close to the sticking portion 201 is the release layer 105. The tearing portion 901 and the sticking portion 201 are repeatedly stuck and torn by repeatedly sticking and tearing the release layer 105 and the self-adhesive layer 106, thereby achieving repeated sticking and tearing of the flip cover 9 and the cigarette taking area 1, and then achieving the closure and exposure of the cigarette taking port 202. The utility model provides an adhesive portion at the cigarette outlet of the packaging box, and a tearing portion matching the adhesive portion on the flip cover, so that it is convenient for frequent opening of the packaging box and effectively prevents the cigarettes from contacting with the outside air during the period when the packaging box is closed again after opening, which can effectively keep the moisture of the cigarettes stable and avoid the loss of the flavor components of the cigarettes, thereby improving the smoking experience of consumers.

[0062] 4. The packaging paper material structure and the packaging box forming method of the utility model do improve the sealing performance of the packaging box, but they also face new problems. Since the cigarette packaging box has good sealing performance, it will swell and bulge due to the influence of external air pressure in high-altitude areas. This is because the air pressure in high-altitude areas is relatively low, and the gas pressure inside the package will increase relatively, causing the packaging material to expand and deform due to internal pressure, or even rupture. This not only affects the aesthetics of the packaging, but may also expose the cigarettes to the outside. If the cigarettes are exposed to the outside, they may be affected by the external environment, such as humidity, temperature, oxygen, etc., resulting in a decline in product quality and damage to taste and quality. Especially in high-altitude areas, due to the particularity of climatic conditions, this effect may be more obvious. In order to avoid this phenomenon, the bottom of the packaging box of the utility model has a pressure relief device, specifically, a pressure relief hole 701 is opened in the material at the bottom of the box, and a pressure relief sheet 702 is covered on the pressure relief hole 701. Since the pressure relief sheet 702 is more likely to deform after being stressed than the packaging paper, when the gas pressure inside the package increases, the pressure will be concentrated in the area of ​​the pressure relief sheet 702, and the pressure relief sheet 702 will bulge, thereby avoiding the bulging problem of the entire packaging box. The pressure relief sheet 702 is located at the bottom of the packaging box, which is relatively difficult to be noticed by consumers, and can minimize the problem of bulging of the packaging box. In addition, since the pressure relief sheet 702 is more susceptible to deformation than the packaging material, the pressure relief sheet 702 is not easy to rupture. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 This is a schematic diagram of the packaging paper structure of the utility model;

[0064] Figure 2 This is a schematic diagram of the packaging box in the first embodiment in the unfolded state;

[0065] Figure 3 This is a schematic diagram of the packaging box body in the open state in Example 1;

[0066] Figure 4 This is a schematic diagram of the packaging box body in the closed state in Example 1;

[0067] Figure 5 This is a schematic diagram of the wrapping paper structure at the cigarette outlet of Example 1;

[0068] Figure 6 This is a schematic diagram of the packaging box in the expanded state in Example 2;

[0069] Figure 7 This is a schematic diagram of the packaging box body in the opened state in Example 2;

[0070] Figure 8 This is a schematic diagram of the packaging box body in the closed state in Example 2;

[0071] Fig. 9 This is a schematic diagram of the packaging box in the expanded state in Example 3;

[0072] Fig.10 This is a schematic diagram of the packaging box body in the open state in Example 3;

[0073] Fig.11 This is a schematic diagram of the packaging box body in the closed state in Example 3;

[0074] Fig.12 This is a schematic diagram of the bottom plate structure with a pressure relief plate of the utility model;

[0075] Fig.13 This is a schematic diagram of the pressure relief principle of the bottom plate with a pressure relief sheet of the utility model;

[0076] Names of reference numerals in the accompanying drawings:

[0077] 1-cigarette taking area, 2-top cover, 3-front side wall, 4-rear side wall, 5-left side wall, 6-right side wall, 7-bottom plate, 8-first folding plate, 9-flip cover, 10-second folding plate, 11-third folding plate, 12-fourth folding plate, 13-fifth folding plate;

[0078] 101-outer PE coating layer, 102-white cardboard layer, 103-outer composite adhesive layer, 104-outer PET layer, 105-release layer, 106-adhesive layer, 107-inner PET layer, 108-inner composite adhesive layer, 109-coated paper layer, 110-inner PE coating layer;

[0079] 201-adhesive portion, 202-cigarette outlet;

[0080] 701-pressure relief hole, 702-pressure relief sheet;

[0081] 901-Tear-off section. DETAILED DESCRIPTION

[0082] The utility model is further described in detail below in conjunction with the embodiments.

[0083] Those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the field or the product instructions are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.

[0084] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used here may include wireless connection.

[0085] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.

[0086] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0087] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that those terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0088] The following embodiments of the utility model can effectively eliminate the gaps formed at the interfaces and corners of the packaging box by adopting packaging paper composed of an outer PE coating layer, a white cardboard layer, a composite adhesive layer, a PET layer, a release layer, a self-adhesive layer, a PET layer, a composite adhesive layer, a coated paper layer and an inner PE coating layer. The packaging box has good sealing performance and has good moisturizing and aroma-preserving effects on the cigarettes in the packaging box. By arranging an adhesive portion at the cigarette outlet of the packaging box and arranging a tearing portion matching the adhesive portion on the flip cover, it is possible to facilitate frequent opening of the packaging box while effectively preventing the cigarettes from contacting with the outside air during the period when the packaging box is closed again after opening, which can effectively maintain the moisture stability of the cigarettes and avoid the loss of the aroma components of the cigarettes, thereby facilitating the improvement of consumers' smoking experience.

[0089] Embodiment 1 The unfolded state of the packaging paper is the first case where the bottom plate 7 is connected to the rear side wall 4

[0090] like Figure 1 As shown, the cigarette packaging paper of this embodiment includes an inner part, an outer part, and a release layer 105 and a self-adhesive layer 106 between the inner part and the outer part;

[0091] The outer part includes in sequence: an outer PE coating layer 101, an outer paper layer 102, an outer composite adhesive layer 103, and an outer PET layer 104;

[0092] The inner part includes in sequence: an inner PET layer 107, an inner composite rubber layer 108, an inner paper layer 109 and an inner PE coating layer 110;

[0093] The release layer 105 is close to the outer PET layer 104 , and the self-adhesive layer 106 is close to the inner PET layer 107 .

[0094] The outer PE coating layer has a gram weight of 26g / m 3 , thickness is 0.028mm;

[0095] The inner PE coating layer has a gram weight of 14 / m 3 , thickness is 0.015mm;

[0096] The outer paper layer 102 is a white cardboard layer, and the weight of the outer paper layer 102 is 150 g / m 3 , thickness is 0.135mm;

[0097] The inner paper layer 109 is a coated paper layer, and the weight of the inner paper layer 109 is 100 g / m 3， Thickness: 0.09mm;

[0098] The thickness of the outer PET layer and the inner PET layer is 12 μm;

[0099] The release layer 105 is selected from PTFE polytetrafluoroethylene coating, and has a thickness of 0.002 mm;

[0100] The self-adhesive layer 106 is selected from PVC self-adhesive and has a thickness of 0.007 mm;

[0101] The outer composite adhesive layer 103 and the inner composite adhesive layer 108 are selected from epoxy resin adhesive and have a thickness of 0.003 mm;

[0102] The outer PE coating layer 101 and the inner PE coating layer 110 are selected from polyethylene.

[0103] That is to say, the packaging paper of the utility model includes ten layers in total, including from the outside to the inside: an outer PE coating layer 101, an outer paper layer 102, an outer composite adhesive layer 103, an outer PET layer 104, a release layer 105, a self-adhesive layer 106, an inner PET layer 107, an inner composite adhesive layer 108, an inner paper layer 109 and an inner PE coating layer 110. Here, "outside" and "inside" are determined according to the packaging box formed by the packaging paper being in a box body state. When the packaging box formed by the packaging paper is in a box body state, cigarettes are placed in the internal cavity formed by the packaging box, the side of the packaging box close to the cigarettes is the innermost layer of the packaging paper, and the side of the packaging box away from the cigarettes is the outermost layer of the packaging paper.

[0104] In the packaging paper of the utility model, the purpose of selecting and arranging the positions of the materials of each layer is as follows:

[0105] Both white cardboard and coated paper are the forming skeletons of packaging materials, ensuring the forming degree and stiffness of the finished cigarette pack. White cardboard is adjacent to the outer PE coating layer, has higher thickness and hardness, and has better wear resistance, so it is better as an external substrate. Coated paper is adjacent to the inner PE coating layer, which can support the inner PE coating layer and help the inner PET layer to restore its original shape after repeated opening and closing.

[0106] The PET layer has good physical and mechanical properties, and has good creep resistance, fatigue resistance, friction resistance, thermal stability, and dimensional stability. It also has good electrical insulation under high temperature and high frequency, which helps to maintain the original shape during ultrasonic welding and helps the cigarette package maintain its original shape after repeated opening and closing. The surface of the PET layer is smooth, which helps the release layer and the self-adhesive layer to adhere. Therefore, the outer PET layer and the inner PET layer can be used as carrier materials for the release layer and the self-adhesive layer, and are also the matrix of the overall packaging material.

[0107] The inner and outer PET layers are attached with composite adhesive layers, which are mainly used to join with paper. That is, the outer composite adhesive layer is used to join the white cardboard layer with the outer PET layer, and the inner composite adhesive layer is used to join the coated paper layer with the inner PET layer.

[0108] The inner part and the outer part are separated by a release layer and a self-adhesive layer, wherein the self-adhesive layer is closer to the inner part and has a higher stickiness. The release layer is a release agent coating, which mainly isolates sticky objects, can play the role of smoothing the film surface and effectively prevent the migration of the adhesive layer. In addition, the release layer also ensures that the tearing part can be repeatedly adhered to the self-adhesive layer on the sticking part after being torn off. In this application, the release layer separates the self-adhesive layer from the outer PET layer. The release layer is adjacent to the outer PET layer, and the self-adhesive layer is adjacent to the inner PET layer.

[0109] The innermost and outermost layers of the packaging paper are PE coatings, which have strong water resistance, oil resistance, and high barrier properties, and can maintain the stability of the packaging paper. At the same time, they can be melt-bonded under the conditions of ultrasonic welding, achieving a good sealing effect at the joints, which should be coordinated with the advantages of ultrasonic welding in the packaging box forming method of the utility model. In addition, the outer PE coating is thicker than the inner PE coating layer to meet the requirements of box sealing and good barrier properties; the inner PE coating layer can effectively protect the internal cigarettes from the influence of the outer paper and the external environment.

[0110] like Figure 2-4 As shown, this embodiment uses the packaging box of the above-mentioned cigarette packaging paper. When the packaging box is in the box body state, the packaging box includes: a top cover 2, a front side wall 3, a rear side wall 4, a left side wall 5, a right side wall 6, and a bottom plate 7;

[0111] The top cover 2 and the front side wall 3 are provided with communicating openings as a cigarette taking area 1 of the packaging box, and the cigarette taking area 1 is provided with a flip cover 9 matching the openings on the top cover 2 and the front side wall 3;

[0112] The flip cover 9 is rotatably connected to the upper end of the rear side wall 4 via a fold, and a fold corresponding to the fold between the top cover 2 and the front side wall 3 is provided on the flip cover 9;

[0113] After the flip cover 9 is reset, the packaging box is in a rectangular state, and the cigarettes are placed in the internal cavity formed by the packaging box; the side of the packaging box close to the cigarettes is the innermost layer of the packaging paper, and the innermost layer of the packaging paper is the inner PE coating layer 110; the side of the packaging box away from the cigarettes is the outermost layer of the packaging paper, and the outermost layer of the packaging paper is the outer PE coating layer 101.

[0114] The top cover 2 and the front side wall 3 at the cigarette taking area 1 of the packaging box extend toward the cigarette taking area 1 with an adhesive portion 201, and the packaging paper at the adhesive portion 201 includes a self-adhesive layer 106, an inner PET layer 107, an inner composite adhesive layer 108, an inner paper layer 109 and an inner PE coating layer 110;

[0115] The flip cover 9 is provided with a tearing portion 901 matching the shape of the sticking portion 201, and the packaging paper at the tearing portion 901 includes an outer PE coating layer 101, an outer paper layer 102, an outer composite adhesive layer 103, an outer PET layer 104 and a release layer 105;

[0116] The cigarette taking area 1 is located inside the sticking portion 201 to form a cigarette taking port 202;

[0117] The side of the adhesive portion 201 close to the tear portion 901 is the self-adhesive layer 106, and the side of the tear portion 901 close to the adhesive portion 201 is the release layer 105. The tear portion 901 and the adhesive portion 201 are repeatedly adhered and torn by repeatedly adhering and tearing the release layer 105 and the self-adhesive layer 106, thereby achieving repeated adhering and tearing of the flip cover 9 and the cigarette taking area 1, and further achieving the closing and exposure of the cigarette taking port 202.

[0118] That is to say, in order to facilitate taking out cigarettes, an opening is provided at the connection between the top cover 2 and the front side wall 3. Before the opening is provided, the top cover 2 and the front side wall 3 are both ten-layer packaging paper in the utility model. The top cover 2 and the front side wall 3 are partially cut by a cutter to form a cigarette taking area 1 and a flip cover 9. The cigarette taking area 1 has a sticking portion 201, and the flip cover 9 has a tearing portion 901. The side of the sticking portion 201 close to the tearing portion 901 is the self-adhesive layer 106, and the side of the tearing portion 901 close to the sticking portion 201 is the release layer 105. Figure 5 As shown, firstly, the cutter is used to cut only the release layer 105 in terms of the number of layers, so that the top cover 2 and the front side wall 3 are divided into the cigarette taking area 1 with the pasting portion 201 and the flip cover 9 with the tearing portion 901, the pasting portion 201 is the inner part of the wrapping paper and the adhesive layer 106, and the tearing portion 901 is the outer part of the wrapping paper and the release layer 105, and then the cutter is used to cut all the wrapping paper in terms of the number of layers again to form a cigarette taking port 202, and all ten layers of the wrapping paper at the cigarette taking port 202 are located on the flip cover 9. The specific depth of the cutter is adjusted according to the different thicknesses of each layer in actual conditions. In this embodiment, the depth of the cutter is about 0.17-0.18mm, so that the thickness of the upper cover at the tearing portion release layer is 0.178mm. The lower part at the pasting portion adhesive layer is 0.127mm.

[0119] The orthographic projections of the cigarette outlet 202 on the top cover 2 and the front side wall 3 are both right-angled rectangles.

[0120] The bottom plate 7 is provided with a pressure relief device, the pressure relief device comprises a pressure relief hole 701, and the pressure relief hole 701 is covered with a pressure relief sheet 702;

[0121] The diameter of the pressure relief hole 701 is 0.7 cm; the material of the pressure relief sheet 702 is latex.

[0122] like Figure 12-13 The pressure relief sheet 702 is pasted as follows: a small hole is designed in the middle of the bottom packaging material, and the pressure relief sheet is covered on the small hole by gluing and heating the gluing on the back. The outer ring of the pressure relief sheet has a circular gluing area, which is pasted inside the circular hole at the bottom of the packaging box. Figure 12-13 Since the pressure relief sheet 702 is more likely to deform after being stressed than the packaging paper, when the gas pressure inside the package increases, the pressure will be concentrated on the pressure relief sheet 702 area, and the pressure relief sheet 702 will bulge, thereby avoiding the bulging problem of the entire packaging box. The pressure relief sheet 702 is located at the bottom of the packaging box and is relatively difficult to be noticed by consumers, which can minimize the bulging problem of the packaging box. In addition, since the pressure relief sheet 702 is more susceptible to deformation than the packaging material, the pressure relief sheet 702 is not easy to rupture.

[0123] like Figure 2 As shown, the unfolded state of the packaging box is the first case, the bottom plate 7 is connected to the rear side wall 4, and the bottom plate 7 is attached to the front side wall 3, the rear side wall 4, and the right side wall 6 through the folding plate.

[0124] When the packaging box is in an unfolded state, the bottom plate 7 is connected to the rear side wall 4, and the packaging box comprises: a top cover 2, a front side wall 3, a rear side wall 4, a left side wall 5, and a right side wall 6 extending vertically in the front, rear, left, and right directions with the top cover 2 as the center, and the bottom plate 7 extending vertically from an end of the rear side wall 4 away from the top cover 2;

[0125] A fold is provided at the connection between the top cover 2 and the front side wall 3, the rear side wall 4, the left side wall 5, and the right side wall 6, and a fold is provided at the connection between the rear side wall 4 and the bottom plate 7. The left and right sides of the front side wall 3 and the rear side wall 4 extend outward to form a first folding plate 8, and the first folding plate 8 on the left side is provided with a fold that is at an angle of 45° with the left side wall 5, and the first folding plate 8 on the right side is provided with a fold that is at an angle of 45° with the right side wall 6; the front side wall 3, the left side wall 5, and the right side wall 6 extend outward at one end away from the top cover 2 to form a second folding plate 10, and the front end, left end, and right end of the bottom plate 7 extend outward to form a third folding plate 11 respectively, and the third folding plate 11 on the left side and the third folding plate 11 on the right side are the same width as the bottom plate 7 and are just not connected to the first folding plates 8 on the left and right sides of the rear side wall 4.

[0126] When the packaging box is in a box body state, the first folding plate 8 on the left side is in contact with the left side wall 5, and the first folding plate 8 on the right side is in contact with the right side wall 6; the second folding plate 10 is folded inward and in contact with the bottom plate 7, and the third folding plate 11 is folded upward and in contact with the front side wall 3, the left side wall 5, and the right side wall 6.

[0127] The shape of the edge of the cigarette taking area 1 and the flip cover 9 is presented as two parallel straight lines on the top cover 2, and is presented as an arc shape on the front side wall 3.

[0128] In Example 2, the unfolded state of the packaging paper is the second case, and the bottom plate 7 is a separate cigarette packaging paper, which is consistent with Example 1.

[0129] like Figure 6-8 As shown, this embodiment adopts the packaging box of the above-mentioned cigarette packaging paper. When the packaging box is in the box body state, it is generally consistent with Embodiment 1.

[0130] The difference between this embodiment and the first embodiment is that when the packaging box is in the unfolded state, the bottom plate 7 is separate, and the bottom plate 7 is attached to the front side wall 3, the rear side wall 4, the left side wall 5, and the right side wall 6 through the folding plate.

[0131] Preferably, when the packaging box is in an unfolded state, the bottom plate 7 is separate, and the packaging box comprises: a top cover 2, a bottom plate 7, and the front side wall 3, the rear side wall 4, the left side wall 5, and the right side wall 6 extending vertically in the front, rear, left, and right directions with the top cover 2 as the center;

[0132] A fold is provided at the connection between the top cover 2 and the front side wall 3, the rear side wall 4, the left side wall 5, and the right side wall 6. The left and right sides of the front side wall 3 and the rear side wall 4 extend outward to form a first folding plate 8. The front and rear sides of the left side wall 5 and the right side wall 6 extend outward to form a fourth folding plate 12. The first folding plate 8 on the left side is provided with a fold that is 45° with the left side wall 5. The first folding plate 8 on the right side is provided with a fold that is 45° with the right side wall 6. The front, rear, left, and right sides of the bottom plate 7 extend outward to form a fifth folding plate 13. There is a fold between the bottom plate 7 and the fifth folding plate 13.

[0133] When the packaging box is in a box body state, the first folding plate 8 on the left side is in contact with the fourth folding plate 12 on the left side, and the first folding plate 8 on the right side is in contact with the fourth folding plate 12 on the right side, the fifth folding plate 13 on the front side is in contact with the front side wall 3, the fifth folding plate 13 on the rear side is in contact with the rear side wall 4, the fifth folding plate 13 on the left side is in contact with the left side wall 5, and the fifth folding plate 13 on the right side is in contact with the right side wall 6.

[0134] The orthographic projection of the cigarette outlet 202 on the top cover 2 is a right-angled rectangle, and the orthographic projection of the cigarette outlet 202 on the top front side wall 3 is a chamfered rectangle.

[0135] The shape of the edge of the cigarette taking area 1 and the flip cover 9 is presented as two parallel straight lines on the top cover 2, and is presented as a trapezoid on the front side wall 3.

[0136] Embodiment 3: The packaging paper is unfolded in the second case. The bottom plate 7 is separate.

[0137] like Figure 9-11 As shown, Example 3 is basically the same as Example 2, and the only difference is that the shapes of the edges of the cigarette taking area 1 and the flip cover 9 are different. In this embodiment, the shapes of the edges of the cigarette taking area 1 and the flip cover 9 are presented as two parallel straight lines on the top cover 2, and as a special shape combining straight lines and curves on the front side wall 3.

[0138] Regarding the drawings corresponding to the above-mentioned embodiments 1-3, it should be noted that the drawings corresponding to the embodiments 2 and 3 are Figure 7 and Fig.10 In order to more accurately indicate the positions of the pasting portion 201 and the tearing portion 901, the pasting portion 201 and the tearing portion 901 of the pasting portion 201 are filled in the figure, and the corresponding positions of the pasting portion 201 and the tearing portion 901 of the embodiment 1 are filled in the figure. Figure 3 In the figure, the positions of the sticking portion 201 and the tearing portion 901 are not filled in.

[0139] The cigarette packaging box forming method described in Example 1 and Example 2 comprises the following steps:

[0140] S1, cutting the wrapping paper according to the unfolded diagram of the packaging box, and setting folds on the wrapping paper; the unfolded state of the packaging box includes two situations, the first situation is that the bottom plate 7 is connected to the rear side wall 4, and the bottom plate 7 is attached to the front side wall 3, the rear side wall 4, and the right side wall 6 through the folding plate. The second situation is that the bottom plate 7 is separate, and the bottom plate 7 is attached to the front side wall 3, the rear side wall 4, the left side wall 5, and the right side wall 6 through the folding plate. In this step, the wrapping paper is cut according to the actual situation.

[0141] S2, forming the cigarette taking area 1 and the flip cover 9 on the top cover 2 and the front side wall 3; that is, in order to facilitate taking out cigarettes, an opening is set at the connection between the top cover 2 and the front side wall 3. Before the opening is set, the top cover 2 and the front side wall 3 are both ten-layer wrapping paper in the utility model. The top cover 2 and the front side wall 3 are partially cut open by a cutter to form the cigarette taking area 1 and the flip cover 9. Figure 5As shown, firstly, the cutting knife is used to cut only the release layer 105 in layers, so that the top cover 2 and the front side wall 3 are divided into the cigarette taking area 1 with the sticking portion 201 and the flip cover 9 with the tearing portion 901, the sticking portion 201 is the inner portion of the wrapping paper and the self-adhesive layer 106, the tearing portion 901 is the outer portion of the wrapping paper and the release layer 105, and then the cutting knife is used to cut all the wrapping paper in layers again to form a cigarette taking port 202, and the ten layers of the wrapping paper at the cigarette taking port 202 are all located on the flip cover 9.

[0142] S3, changing the packaging box from the unfolded state to the box body state; usually, the packaging box is changed from the unfolded state to the box body state by folding.

[0143] S4, by ultrasonic welding, the PE coating is melt-bonded under pressure and heating conditions, so as to bond the front side wall 3, the rear side wall 4, the left side wall 5, the right side wall 6, and the bottom plate 7. Different unfolded views will form different connections after folding, and in this step, the existing connections are bonded according to the actual situation.

[0144] Preferably, the ultrasonic welding conditions in step S2 are: ultrasonic welding frequency of 40kHz, increased pressure of 0.8MP, amplitude of 1mm, and holding time of 10s. Under the high-frequency vibration of the ultrasonic welding machine, a certain amount of heat is generated, which makes the PE coating layer melt and stick, and then the sticking surface of the box is made more firm by pressurization.

[0145] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.

Claims

1. A cigarette packaging paper, characterized in that: It comprises an inner part, an outer part, and a release layer (105) and a self-adhesive layer (106) between the inner part and the outer part; The outer part comprises in sequence: an outer PE coating layer (101), an outer paper layer (102), an outer composite adhesive layer (103), and an outer PET layer (104); The inner part includes in sequence: an inner PET layer (107), an inner composite rubber layer (108), an inner paper layer (109) and an inner PE coating layer (110); The release layer (105) is close to the outer PET layer (104), and the self-adhesive layer (106) is close to the inner PET layer (107).

2. The cigarette wrapping paper according to claim 1, characterized in that: The outer PE coating layer has a gram weight of 25-28 g / m 3 , thickness 0.026-0.030mm; The inner PE coating layer has a gram weight of 14-16 g / m 3 , thickness 0.014-0.016mm; The outer paper layer (102) is a white cardboard layer or a coated paper layer, and the gram weight of the outer paper layer (102) is 140-160 g / m 3 , thickness 0.130-0.14mm; The inner paper layer (109) is a coated paper layer, and the gram weight of the inner paper layer (109) is 80-100 g / m 3 , thickness 0.08-0.1mm; The thickness of the outer PET layer and the inner PET layer is 0.01-0.012 mm; The release layer (105) is selected from but not limited to PTFE and PE coatings, and has a thickness of 0.002-0.004 mm; The self-adhesive layer (106) is selected from but not limited to PVC self-adhesive and PET self-adhesive, and has a thickness of 0.006-0.007 mm; The outer composite adhesive layer (103) and the inner composite adhesive layer (108) are selected from but not limited to polyurethane adhesive and epoxy resin adhesive, and have a thickness of 0.003-0.005 mm; The outer PE coating layer (101) and the inner PE coating layer (110) are selected from polyethylene.

3. A cigarette packaging box using the cigarette packaging paper according to any one of claims 1 to 2, characterized in that: When the packaging box is in a box body state, the packaging box comprises: a top cover (2), a front side wall (3), a rear side wall (4), a left side wall (5), a right side wall (6), and a bottom plate (7); The top cover (2) and the front side wall (3) are provided with a communicating opening as a cigarette taking area (1) of the packaging box, and the cigarette taking area (1) is provided with a flip cover (9) matching the openings on the top cover (2) and the front side wall (3); The flip cover (9) is rotatably connected to the upper end of the rear side wall (4) via a fold, and a fold corresponding to the fold between the top cover (2) and the front side wall (3) is provided on the flip cover (9); After the flip cover (9) is reset, the packaging box is in a rectangular parallelepiped state, and the cigarettes are placed in the internal cavity formed by the packaging box; the side of the packaging box close to the cigarettes is the innermost layer of the packaging paper, and the innermost layer of the packaging paper is the inner PE coating layer (110); the side of the packaging box away from the cigarettes is the outermost layer of the packaging paper, and the outermost layer of the packaging paper is the outer PE coating layer (101).

4. The cigarette package according to claim 3, characterized in that: The top cover (2) and the front side wall (3) at the cigarette taking area (1) of the packaging box are provided with an adhesive portion (201) extending in the direction of the cigarette taking area (1), and the packaging paper at the adhesive portion (201) comprises a self-adhesive layer (106), an inner PET layer (107), an inner composite adhesive layer (108), an inner paper layer (109) and an inner PE coating layer (110); The flip cover (9) is provided with a tearing portion (901) whose shape matches that of the sticking portion (201), and the packaging paper at the tearing portion (901) comprises an outer PE coating layer (101), an outer paper layer (102), an outer composite adhesive layer (103), an outer PET layer (104) and a release layer (105); The cigarette taking area (1) is located at the inner side of the adhesive portion (201) to form a cigarette taking port (202); The side of the adhesive portion (201) close to the tearing portion (901) is the self-adhesive layer (106), and the side of the tearing portion (901) close to the adhesive portion (201) is the release layer (105). The tearing portion (901) and the adhesive portion (201) are repeatedly adhered and torn by repeatedly adhering and tearing the release layer (105) and the self-adhesive layer (106), thereby achieving repeated adhering and tearing of the flip cover (9) and the cigarette taking area (1), and further achieving the closure and exposure of the cigarette taking port (202).

5. The cigarette package according to claim 4, characterized in that: The orthographic projections of the cigarette outlet (202) on the top cover (2) and the front side wall (3) are both rectangular, and the rectangle includes a right-angled rectangle or a chamfered rectangle; The shape of the edges of the cigarette extraction area (1) and the flip cover (9) are two parallel straight lines on the top cover (2), and are arc-shaped, trapezoidal, or a combination of straight lines and curves on the front side wall (3).

6. The cigarette package according to claim 3, characterized in that: The bottom plate (7) is provided with a pressure relief device, the pressure relief device comprising a pressure relief hole (701), and the pressure relief hole (701) is covered with a pressure relief sheet (702); The diameter of the pressure relief hole (701) is 0.7-0.8 cm; the material of the pressure relief sheet (702) is latex; The unfolded state of the packaging box includes two situations. In the first situation, the bottom plate (7) is connected to the rear side wall (4), and the bottom plate (7) is attached to the front side wall (3), the rear side wall (4), and the right side wall (6) through a folding plate. In the second situation, the bottom plate (7) is separate, and the bottom plate (7) is attached to the front side wall (3), the rear side wall (4), the left side wall (5), and the right side wall (6) through a folding plate.

7. The cigarette package according to claim 3, characterized in that: When the packaging box is in an unfolded state, the bottom plate (7) is connected to the rear side wall (4), and the packaging box comprises: a top cover (2), a front side wall (3), a rear side wall (4), a left side wall (5), and a right side wall (6) extending vertically in the front, rear, left, and right directions with the top cover (2) as the center, and the bottom plate (7) extending vertically at one end of the rear side wall (4) away from the top cover (2); A fold is provided at the connection between the top cover (2) and the front side wall (3), the rear side wall (4), the left side wall (5) and the right side wall (6); a fold is provided at the connection between the rear side wall (4) and the bottom plate (7); the left and right sides of the front side wall (3) and the rear side wall (4) extend outward to form a first folding plate (8); the first folding plate (8) on the left side is provided with a fold forming an angle of 45° with the left side wall (5); the first folding plate (8) on the right side is provided with a fold forming an angle of 45° with the left side wall (5); The right side wall (6) is formed with a fold at an angle of 45°; the front side wall (3), the left side wall (5), and the right side wall (6) extend outward at one end away from the top cover (2) to form a second folding plate (10); the front end, the left end, and the right end of the bottom plate (7) extend outward to form a third folding plate (11); the third folding plate (11) on the left side and the third folding plate (11) on the right side are the same width as the bottom plate (7) and are just not connected to the first folding plates (8) on the left and right sides of the rear side wall (4); When the packaging box is in a box body state, the first folding plate (8) on the left side is in contact with the left side wall (5), and the first folding plate (8) on the right side is in contact with the right side wall (6); the second folding plate (10) is folded inwardly and in contact with the bottom plate (7), and the third folding plate (11) is folded upwardly and in contact with the front side wall (3), the left side wall (5), and the right side wall (6).

8. The cigarette package according to claim 3, characterized in that: When the packaging box is in an unfolded state, the bottom plate (7) is separate, and the packaging box comprises: a top cover (2), a bottom plate (7), and the front side wall (3), the rear side wall (4), the left side wall (5), and the right side wall (6) extending vertically in the front, rear, left, and right directions with the top cover (2) as the center; A fold is provided at the connection between the top cover (2) and the front side wall (3), the rear side wall (4), the left side wall (5) and the right side wall (6); the left and right sides of the front side wall (3) and the rear side wall (4) extend outward to form a first folding plate (8); the front and rear sides of the left side wall (5) and the right side wall (6) extend outward to form a fourth folding plate (12); the first folding plate (8) on the left side is provided with a fold forming an angle of 45° with the left side wall (5); the first folding plate (8) on the right side is provided with a fold forming an angle of 45° with the right side wall (6); the front, rear, left and right sides of the bottom plate (7) extend outward to form a fifth folding plate (13); a fold is provided between the bottom plate (7) and the fifth folding plate (13); When the packaging box is in a box body state, the first folding plate (8) on the left side is in contact with the fourth folding plate (12) on the left side, and the first folding plate (8) on the right side is in contact with the fourth folding plate (12) on the right side, the fifth folding plate (13) on the front side is in contact with the front side wall (3), the fifth folding plate (13) on the rear side is in contact with the rear side wall (4), the fifth folding plate (13) on the left side is in contact with the left side wall (5), and the fifth folding plate (13) on the right side is in contact with the right side wall (6).

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