Packaging structure based on plastic-substituted paper

Abstract

A packaging bag main body is composed of an inner bag structure and an outer bag structure, the outer bag structure comprises an outer bag body, a handle part and a first sealing structure, the inner bag body is arranged at the bottom of the outer bag body in an embedded mode, and the overall structure of the packaging bag main body is enhanced; the take-out box placed in the inner bag body can be effectively protected and kept warm, the connecting position of the inner bag body and the outer bag body is sealed through the second sealing structure, meanwhile, an inner skirt edge is formed, the take-out box is placed in the inner bag body, the inner skirt edge abuts against the top end of the take-out box, the take-out box cannot shake up and down in the jolting state, and therefore the take-out box can be kept warm. The take-out box is effectively protected against oil leakage in the transportation process, the first oil-proof layer and the second oil-proof layer protect the packaging bag body against permeation under the oil leakage condition, and the situation that the bag body becomes soft and breaks is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of food packaging, and in particular to a packaging structure based on plastic-substitute paper. Background Art

[0002] Packaging bags refer to bags used to package various supplies, which make it convenient to transport and store goods during the production and circulation process. Packaging bags are widely used in the current takeout industry. Takeout requires a large number of packaging bags for packaging to facilitate transportation and protect the takeout. In order to facilitate packaging and reduce costs, some businesses widely use plastic bags. The used plastic bags are eventually discarded by customers at will and transported to landfills for treatment like general garbage, posing the problem of environmental pollution.

[0003] PP plastic bags are currently widely popular in the market. Plastic bags are polluting to the environment and are not easy to degrade, and they do not protect takeout. Riders will encounter bumps during transportation, and takeout packed in plastic bags will easily leak juice and oil due to shaking during bumps, affecting diners' appetite. Some businesses use paper packaging bags for environmental protection reasons, which also plays a certain role in environmental protection. However, the existing packaging bags have a simple structure and only provide convenient transportation. They cannot cope with the bumps and oil leakage during transportation. In order to deliver orders quickly, riders often deliver several orders at the same time, and the takeout will also be squeezed. In addition, the bumpy road makes oil leakage more likely. If the paper packaging bag leaks oil, the bag will become soft and prone to damage. Summary of the invention

[0004] In view of the technical defects existing in the background technology, the present invention proposes a packaging structure based on plastic-substitute paper, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows: A packaging structure based on plastic-substitute paper, comprising a packaging bag body, the packaging bag body consisting of an inner bag structure and an outer bag structure, the outer bag structure comprising an outer bag body opening upward, a handle portion arranged at the upper edge of the outer bag body opening, and a first sealing structure arranged near the upper edge of the outer bag body opening, the outer bag body comprising a first oil-proof layer and a first base paper layer arranged in sequence from the inside to the outside; The inner bag structure comprises an inner bag body opening upward and a second sealing structure arranged at the upper edge of the inner bag body opening, the inner bag body is formed by surrounding a plastic-substitute paperboard, and the plastic-substitute paperboard is provided with a second oil-proof layer, a fourth base paper layer, a core layer and a second base paper layer in sequence from the inside to the outside, and the second sealing structure is arranged at a position where the upper edge of the inner bag body and the outer bag body are attached and covers the upper edge of the fourth base paper layer; As an improvement on the above scheme, the outer bag body is formed by a plastic-substitute paper main body which is surrounded in a rectangular shape and one end is closed. The closed end of the plastic-substitute paper main body after being surrounded is the bottom, and the inner bag body is provided in the outer bag body near the closed end. The plastic-substitute paper main body is separated into a first base paper layer and a second base paper layer along the connecting position between the inner bag structure and the outer bag structure, and the first base paper layer is connected to the handle.

[0005] As an improvement of the above-mentioned scheme, the first sealing structure includes a first adhesive layer and a release layer. The first adhesive layer is horizontally coated on the inner wall of one side of the outer bag body close to the opening position. The release layer is bonded to the surface of the first adhesive layer. The width and length of the release layer are both larger than the width and length of the first adhesive layer. The top horizontal height of the release layer does not exceed the horizontal height of the opening of the outer bag body.

[0006] As an improvement of the above scheme, a first oil-proof layer is provided on the inner wall of the first base paper layer, and a layer of silicone oil is coated on the inner wall of the first base paper layer to form the first oil-proof layer, and the lower edge of the first oil-proof layer is coated to cover the outer surface of the second sealing structure.

[0007] As an improvement of the above scheme, the second sealing structure includes a third base paper layer and a second adhesive layer. The third base paper layer is arranged at the dividing line between the first base paper layer and the second base paper layer. The overlapping part of the third base paper layer and the second base paper layer covers the upper edge opening position of the plastic-free paperboard, thereby forming an inner skirt extending toward the inner bag body.

[0008] As an improvement on the above solution, the second adhesive layer is provided on the overlapping portion of the third base paper layer and the first base paper layer, and the first oil-proof layer is coated on the end surface of the third base paper layer away from the first base paper layer.

[0009] As an improvement on the above scheme, the inner bag body is embedded in the bottom of the outer bag body, the horizontal height of the upper edge of the inner bag body does not exceed the horizontal height of the upper edge of the second base paper layer, the two end surfaces of the fourth base paper layer opposite to the second base paper layer are coated with a third adhesive layer, and the two side end surfaces of the core layer are respectively bonded and fixed to the fourth base paper layer and the second base paper layer through the third adhesive layer.

[0010] As an improvement of the above solution, the core layer is formed by bending a single base paper in a wave shape to form a corrugated structure with a plurality of cavities, and the two side end surfaces of the corrugated structure are bonded and fixed to the fourth base paper layer and the second base paper layer.

[0011] As an improvement of the above solution, the second oil-proof layer is sprayed on the side of the fourth base paper layer away from the second base paper layer. The second oil-proof layer is a silicone oil layer. The second oil-proof layer penetrates into the gap between two adjacent plastic-substitute paperboards.

[0012] The beneficial effects of the present invention are as follows: the inner bag body is embedded at the bottom of the outer bag body to enhance the overall structure of the packaging bag body, and can effectively protect and insulate the takeaway box placed in the inner bag body; the connection position between the inner bag body and the outer bag body is sealed by the second sealing structure, and an inner skirt is formed at the same time; the takeaway box is placed in the inner bag body, and the inner skirt abuts against the top of the takeaway box, so that the takeaway box will not shake up and down in a bumpy state, and the takeaway box during transportation will be effectively protected from oil leakage; the first oil-proof layer and the second oil-proof layer protect the packaging bag body from penetration in the event of oil leakage, and prevent the bag body from softening and cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the internal structure of the packaging bag body of the present invention.

[0014] Figure 2 This is a schematic diagram of the main structure of the packaging bag of the first embodiment of the present invention.

[0015] Figure 3 This is a schematic diagram of the main structure of a packaging bag according to a second embodiment of the present invention.

[0016] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A.

[0017] Figure 5 for Figure 3 Schematic diagram of the enlarged structure of part B.

[0018] Among them: packaging bag body 1, outer bag body 2, first oil-proof layer 201, first base paper layer 202, handle part 3, first sealing structure 4, first adhesive layer 401, release layer 402, inner bag body 5, second oil-proof layer 501, fourth base paper layer 502, core layer 503, second base paper layer 504, third adhesive layer 505, second sealing structure 6, third base paper layer 601, second adhesive layer 602, inner skirt 603. DETAILED DESCRIPTION

[0019] The implementation modes of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation modes of the present invention are not limited to the following embodiments, and the present invention relates to relevant necessary components in the technical field, which should be regarded as the known technology in the technical field and can be known and mastered by the technical personnel in the technical field.

[0020] like Figure 1As shown, a packaging structure based on plastic substitute paper includes a packaging bag body 1, the packaging bag body 1 is composed of an inner bag structure and an outer bag structure, the outer bag structure includes an outer bag body 2 with an opening upward, a handle portion 3 arranged at the upper edge of the opening of the outer bag body 2, and a first sealing structure 4 arranged near the upper edge of the opening of the outer bag body 2, the outer bag body 2 includes a first oil-proof layer 201 and a first base paper layer 202 arranged in sequence from the inside to the outside; The inner bag structure comprises an inner bag body 5 with an opening upward and a second sealing structure 6 arranged at the upper edge of the opening of the inner bag body 5. The inner bag body 5 is formed by surrounding plastic-substitute paperboard, and the plastic-substitute paperboard is provided with a second oil-proof layer 501, a fourth base paper layer 502, a core layer 503 and a second base paper layer 504 in sequence from the inside to the outside. The second sealing structure 6 is arranged at a position where the upper edge of the inner bag body 5 fits the outer bag body 2 and covers the upper edge of the fourth base paper layer 502. In the packaging bag main body 1 structure of the present invention, the packaging bag main body 1 includes an inner bag body 5 and an outer bag body 2, the outer bag body 2 is formed by a single plastic paper main body integrally surrounded to form a rectangular hollow tube, and one end of the rectangular hollow tube is closed to form a bottom, and the other end forms an opening, the inner bag body 5 extends into one side of the opening of the outer bag body 2, and is semi-embedded at the bottom end of the outer bag body 2, a second sealing structure 6 is provided at the position where the upper edge of the opening of the inner bag body 5 fits with the inner wall of the outer bag body 2, the second sealing structure 6 covers the connection position between the inner bag body 5 and the outer bag body 2, and forms an inner skirt 603 extending toward the inside of the inner bag body 5, the inner skirt 603 abuts against the top of the takeaway box, the takeaway box will not shake up and down in a bumpy state, and the takeaway box during transportation will be effectively protected from oil leakage due to bumps.

[0021] In the structure of the outer bag body 2 of the present invention, the outer bag body 2 is formed by a plastic-substitute paper main body surrounded in a rectangular shape and one end is closed, the closed end of the plastic-substitute paper main body after being surrounded is the bottom, and the inner bag body 5 is provided near the closed end in the outer bag body 2, and the plastic-substitute paper main body is separated into a first base paper layer 202 and a second base paper layer 504 along the connection position between the inner bag structure and the outer bag structure, and the first base paper layer 202 is connected to the handle portion 3; Specifically, the plastic substitute paper body is divided into a first base paper layer 202 and a second base paper layer 504 connected to each other. The first oil-proof layer 201 is coated on the area of ​​the plastic substitute paper body corresponding to the first base paper layer 202. The first oil-proof layer 201 is used to protect the outer bag structure part of the packaging bag body to prevent oil and water in the takeaway box from leaking into the area of ​​the first base paper layer 202, resulting in a weakened connection strength between the handle 3 and the first base paper layer 202, thereby preventing the bag body from softening and rupturing. The third adhesive layer 505 is coated on the area corresponding to the second base paper layer 504. The third adhesive layer 505 is used to bond and fix with the corrugated structure in the inner bag structure. The corrugated structure strengthens the structural strength of the packaging bag body 1. It should be noted that an uncoated area is reserved near the separation line between the first base paper layer 202 and the second base paper layer 504, and a second sealing structure 6 is provided at the separation line between the first base paper layer 202 and the second base paper layer 504. The second sealing structure 6 includes a third base paper layer 601 and a second adhesive layer 602. The width of the third base paper layer 601 is greater than that of the second adhesive layer 602. The second adhesive layer 602 is coated on the uncoated area of ​​the first base paper layer 202, and the side edge of the third base paper layer 601 facing the opening of the outer bag body 2 is bonded to the second adhesive layer 602. After the side edge of the adhesive layer 602 facing the opening of the outer bag body 2 is aligned, the third base paper layer 601 is bonded and compounded with the first base paper layer 202, so that the other side of the third base paper layer 601 extends toward the second base paper layer 504 to form an inner skirt 603, the inner skirt 603 is not bonded and fixed to the third adhesive layer 505 on the surface of the second base paper layer 504, the core layer 503 is fixed to the third adhesive layer 505, the fourth base paper layer 502 is bonded and fixed to the core layer 503, and there is a gap between the inner skirt 603 and the fourth base paper layer 502; Furthermore, in the above solution, the second adhesive layer 602 is provided on the overlapping portion of the third base paper layer 601 and the first base paper layer 202 , and the end surface of the third base paper layer 601 away from the first base paper layer 202 is coated with the first oil-proof layer 201 .

[0022] Furthermore, in the above scheme, a first oil-proof layer 201 is provided on the inner wall corresponding to the first base paper layer 202, and a layer of silicone oil is coated on the inner wall of the first base paper layer 202 to form the first oil-proof layer 201, and the lower edge of the first oil-proof layer 201 is coated to cover the outer surface of the second sealing structure 6.

[0023] It should be noted that one end surface of the third base paper layer 601 is bonded and fixed to the first base paper layer 202 through the second adhesive layer 602, and the other end surface is coated with the first oil-proof layer 201. By coating the first oil-proof layer 201 on the third base paper layer 601, it is possible to effectively prevent oil leakage from penetrating along the gap between the inner bag body 5 and the outer bag body 2, thereby affecting the structure of the second base paper layer 504, and protecting the separation line between the first base paper layer 202 and the second base paper layer 504. Furthermore, in the above scheme, the first sealing structure 4 includes a first adhesive layer 401 and a release layer 402, the first adhesive layer 401 is horizontally coated on the inner wall of one side of the outer bag body 2 close to the opening position, the release layer 402 is bonded to the surface of the first adhesive layer 401, the width and length of the release layer 402 are both larger than the width and length of the first adhesive layer 401, and the top horizontal height of the release layer 402 does not exceed the opening horizontal height of the outer bag body 2.

[0024] It should be noted that the first sealing structure 4 is used to seal the opening side of the outer bag body 2, and is used to place the takeaway in the packaging bag body 1, tear open the release layer 402 to expose the first adhesive layer 401, and seal the opening of the packaging bag body 1 by manual kneading; like Figure 2 As shown, it should be noted that, in one embodiment of the present invention, two first sealing structures 4 are relatively arranged near the opening position of the packaging bag main body 1, that is, the first adhesive layer 401 and the release layer 402 are arranged on the opposite inner surfaces of the first base paper layer 202. In this embodiment, the first oil-proof layer 201 is coated on the inner surface of the first base paper layer 202. When the first oil-proof layer 201 is coated, a reserved area is used to coat the first adhesive layer 401, and the same first sealing structure 4 is arranged on the other side of the opening of the packaging bag main body 1, and the opening position of the packaging bag main body 1 is sealed by the first adhesive layers 401 arranged relatively on both sides of the opening; like Figure 3 As shown, in the second embodiment of the present invention, the first sealing structure 4 is provided on one end face close to the opening position of the packaging bag main body 1, that is, the first adhesive layer 401 and the release layer 402 are provided on the inner surface of one side of the first base paper layer 202. In this embodiment, when the first oil-proof layer 201 is coated on the inner surface of the first base paper layer 202, a reserved area close to the opening position of the packaging bag main body 1 is used to coat the first adhesive layer 401, and the first sealing structure 4 is set at the position of the first base paper layer 202 not coated with silicone oil to be bonded and sealed with the position on the other side not coated with silicone oil.

[0025] like Figure 4 As shown, further, in the above scheme, the second sealing structure 6 includes a third base paper layer 601 and a second adhesive layer 602, the third base paper layer 601 is arranged at the separation line position of the first base paper layer 202 and the second base paper layer 504, and the overlapping part of the third base paper layer 601 and the second base paper layer 504 covers the upper edge opening position of the plastic-substitute paperboard, thereby forming an inner skirt 603 extending toward the inner bag body 5; It should be noted that, when in use, the takeaway box will not be hindered from passing through the second sealing structure 6 from the opening position of the packaging bag body 1 toward the bottom of the packaging bag body. After the takeaway box is placed in the inner bag body 5, the lower edge of the inner skirt 603 will abut against the end cover of the takeaway box. Without the action of external force, the takeaway box cannot move from the inner bag body 5 toward the opening direction of the outer bag body 2 by bumping. The inner skirt 603 plays a role in auxiliary fixing of the takeaway box. It should be noted that in the prior art, in order to prevent the takeaway box placed in the bag from shaking, most merchants use staplers to fix it directly. It is difficult for users to open the packaging bag, and the bag is easily broken during the opening process. The oil-proof layer on the inner surface of the packaging bag fixed by staplers is damaged. When food leaks, the leaked oil can penetrate along the nail holes, affecting the customer's ordering experience. By setting the fixing method of the second sealing structure 6 relative to the stapler, the second sealing structure 6 fixes the takeaway box through the inner skirt 603, thereby protecting the integrity of the first oil-proof layer 201 and the second oil-proof layer 501. The second sealing structure 6 will not affect the merchant's packaging operation when packing, and customers do not need to tear open the packaging bag or remove the staples one by one when picking up food.

[0026] In the structure of the inner bag body 5 of the present invention, the inner bag body 5 is formed by surrounding a plastic-substitute paperboard, and the plastic-substitute paperboard is provided with a second oil-proof layer 501, a fourth base paper layer 502, a core layer 503, and a second base paper layer 504 in sequence from the inside to the outside, wherein the second base paper layer 504 is connected to the first base paper layer 202 to form a plastic-substitute paper body; Furthermore, in the above scheme, the inner bag body 5 is embedded in the bottom of the outer bag body 2, the horizontal height of the upper edge of the inner bag body 5 does not exceed the horizontal height of the upper edge of the second base paper layer 504, and the two end surfaces of the fourth base paper layer 502 opposite to the second base paper layer 504 are coated with a third adhesive layer 505, and the two side end surfaces of the core layer 503 are respectively bonded and fixed to the fourth base paper layer 502 and the second base paper layer 504 through the third adhesive layer 505.

[0027] Specifically, the core layer 503 is sandwiched between the fourth base paper layer 502 and the second base paper layer 504, and the core layer 503 is used to support the second base paper layer 504 and the fourth base paper layer 502. The structural strength of the inner bag body 5 is increased by the corrugated structure of the core layer 503, so that the structural strength of the position corresponding to the inner bag body 5 in the packaging bag main body 1 is higher than the structural strength of the first base paper layer 202. The takeaway box is placed in the inner bag body 5, and the front and back sides, left and right sides and the bottom of the takeaway box are protected by the corrugated structure formed by the core layer 503, which can effectively increase the compressive strength of the inner bag body 5; Specifically, when the rider delivers the takeout, the corrugated structure can effectively resist external pressure and prevent the surface of the takeout box from directly bearing the external pressure. When plastic bags and ordinary paper bags are used for delivery, when the outer surface of the bag body is locally subjected to force, the force cannot be dispersed. In the present invention, a corrugated structure is arranged at the position of the inner bag body 5. When a local position of the bag body is subjected to external force, the force will be dispersed from the dotted surface to the corrugated structure on the side of the packaging bag body 1, and will not directly act on the local position of the takeout box, thereby effectively protecting the takeout box.

[0028] like Figure 5 As shown, further, in the above scheme, the core layer 503 is formed by bending a single base paper in a wave shape to form a corrugated structure with a plurality of cavities, and the two side end surfaces of the corrugated structure are bonded and fixed to the fourth base paper layer 502 and the second base paper layer 504.

[0029] Furthermore, in the above scheme, the second oil-proof layer 501 is sprayed on the side of the fourth base paper layer 502 away from the second base paper layer 504, and the second oil-proof layer 501 is a silicone oil layer. The second oil-proof layer 501 penetrates into the gap between two adjacent plastic-free cardboard sheets.

[0030] Specifically, the inner bag body 5 is formed by surrounding five connected plastic-free cardboards. If the gap between two adjacent plastic-free cardboards is not treated with oil prevention, oil leakage and penetration will occur. By spraying a silicone oil layer in the inner bag body 5 after the enclosure, and forming a second oil-proof layer 501 on the inner surface of the inner bag body 5 through multiple spraying and drying, it can effectively prevent oil leakage or liquid from penetrating into the outer bag body 2 along the gap of the inner bag body 5, and prevent the bag body from softening and cracking.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A packaging structure based on plastic-free paper, characterized in that: The packaging bag comprises a packaging bag body (1), the packaging bag body (1) comprising an inner bag structure and an outer bag structure, the outer bag structure comprising an outer bag body (2) opening upward, a handle portion (3) arranged at the upper edge of the opening of the outer bag body (2), and a first sealing structure (4) arranged near the upper edge of the opening of the outer bag body (2), the outer bag body (2) comprising a first oil-proof layer (201) and a first base paper layer (202) arranged in sequence from the inside to the outside; The inner bag structure comprises an inner bag body (5) opening upward and a second sealing structure (6) arranged at the upper edge of the opening of the inner bag body (5); the inner bag body (5) is formed by surrounding a plastic-free paperboard, and the plastic-free paperboard is provided with a second oil-proof layer (501), a fourth base paper layer (502), a core layer (503) and a second base paper layer (504) in sequence from the inside to the outside; the second sealing structure (6) is arranged at a position where the upper edge of the inner bag body (5) and the outer bag body (2) are in contact and covers the upper edge of the fourth base paper layer (502).

2. The packaging structure based on plastic-substitute paper according to claim 1, characterized in that: The outer bag body (2) is formed by a plastic-substitute paper main body which is surrounded in a rectangular shape and has one end which is closed. The closed end of the plastic-substitute paper main body after being surrounded serves as a bottom. The inner bag body (5) is provided in the outer bag body (2) near the closed end. The plastic-substitute paper main body is divided into a first base paper layer (202) and a second base paper layer (504) along a connection position between the inner bag structure and the outer bag structure. The first base paper layer (202) is connected to the handle portion (3).

3. The packaging structure based on plastic substitute paper according to claim 1, characterized in that: The first sealing structure (4) comprises a first adhesive layer (401) and a release layer (402); the first adhesive layer (401) is horizontally coated on an inner wall of the outer bag body (2) near the opening; the release layer (402) is bonded to the surface of the first adhesive layer (401); the width and length of the release layer (402) are greater than the width and length of the first adhesive layer (401); and the top horizontal height of the release layer (402) does not exceed the horizontal height of the opening of the outer bag body (2).

4. The packaging structure based on plastic substitute paper according to claim 1 or 2, characterized in that: A first oil-proof layer (201) is provided on the inner wall of the first base paper layer (202), and a layer of silicone oil is coated on the inner wall of the first base paper layer (202) to form the first oil-proof layer (201), and the lower edge of the first oil-proof layer (201) is coated to cover the outer surface of the second sealing structure (6).

5. The packaging structure based on plastic substitute paper according to claim 1, characterized in that: The second sealing structure (6) comprises a third base paper layer (601) and a second adhesive layer (602), wherein the third base paper layer (601) is arranged at a separation line between the first base paper layer (202) and the second base paper layer (504), and the overlapping portion of the third base paper layer (601) and the second base paper layer (504) covers the upper edge opening of the plastic-free paperboard, thereby forming an inner skirt (603) extending toward the inner bag body (5).

6. The packaging structure based on plastic substitute paper according to claim 5, characterized in that: The second adhesive layer (602) is provided at the overlapping portion of the third base paper layer (601) and the first base paper layer (202), and the first oil-proof layer (201) is coated on the end surface of the third base paper layer (601) away from the first base paper layer (202).

7. The packaging structure based on plastic substitute paper according to claim 1, characterized in that: The inner bag body (5) is embedded in the bottom of the outer bag body (2); the horizontal height of the upper edge of the inner bag body (5) does not exceed the horizontal height of the upper edge of the second base paper layer (504); the two end surfaces of the fourth base paper layer (502) opposite to the second base paper layer (504) are coated with a third adhesive layer (505); and the two side end surfaces of the core layer (503) are respectively bonded and fixed to the fourth base paper layer (502) and the second base paper layer (504) through the third adhesive layer (505).

8. The packaging structure based on plastic-substitute paper according to claim 7, characterized in that: The core layer (503) is formed by bending a single base paper in a wave shape, thereby forming a corrugated structure with a plurality of cavities, and the two side end surfaces of the corrugated structure are bonded and fixed to the fourth base paper layer (502) and the second base paper layer (504).

9. The packaging structure based on plastic substitute paper according to claim 1, characterized in that: The second oil-proof layer (501) is sprayed on the side of the fourth base paper layer (502) away from the second base paper layer (504), and the second oil-proof layer (501) is a silicone oil layer. The second oil-proof layer (501) penetrates into the gap between two adjacent plastic-replacement paperboards.

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