Degradable paper-plastic composite packaging bag

Abstract

The degradable paper-plastic composite packaging bag comprises bag pieces, the bag pieces are matched together to form a bag body, the bag body is provided with a bag opening, each bag piece comprises a paper layer, a PGA spraying film resin layer and an ink layer, the ink layer and the PGA spraying film resin layer are arranged on the two sides of the paper layer respectively, the PGA spraying film resin layer is located in the bag body, and the PGA spraying film resin layer is located in the bag body. The printing ink layer is located outside the bag body, the thickness of the paper layer is larger than that of the PGA lamination resin layer, the thickness of the PGA lamination resin layer is larger than that of the printing ink layer, and an easy-to-tear line is arranged on the bag body and is a linear easy-to-tear line. The packaging bag has the following beneficial effects that the bag sheet is formed by compounding the laminating resin layer and the paper layer, so that the whole bag body cannot be layered and cracked, and the whole bag body does not have peculiar smell.

Description

Technical Field

[0001] This utility model relates to the field of packaging materials, and in particular to a biodegradable paper-plastic composite packaging bag. Background Technology

[0002] Paper-plastic resealable bags are a commonly used type of packaging bag. Patent publication CN114228293A discloses a composite film for preparing paper-plastic resealable bags. This composite film includes a paper film and a heat-sealing film, wherein the paper film and the heat-sealing film are bonded together by a PVA coating liquid. In this composite film, the paper film and the heat-sealing film are bonded together by PVA, so not only is the composite strength between the paper film and the heat-sealing film relatively low, but it also contains solvent residue, resulting in odor problems after bag making and making it difficult to degrade. Utility Model Content

[0003] This invention addresses the aforementioned problems by proposing a biodegradable paper-plastic composite packaging bag.

[0004] The technical solution adopted by this utility model is as follows:

[0005] A biodegradable paper-plastic composite packaging bag includes bag sheets that are fitted together to form a bag body. The bag body has a bag opening. The bag sheet includes a paper layer, a PGA (polyglycolic acid) coating resin layer, and an ink layer. The ink layer and the PGA coating resin layer are respectively disposed on both sides of the paper layer. The PGA coating resin layer is located inside the bag body, and the ink layer is located outside the bag body. The thickness of the paper layer is greater than the thickness of the PGA coating resin layer, and the thickness of the PGA coating resin layer is greater than the thickness of the ink layer. The bag body is provided with an easy-tear line, and the easy-tear line is a straight line.

[0006] In this type of biodegradable paper-plastic composite packaging bag, the bag sheet is composed of a paper layer, a PGA coating resin layer, and an ink layer. The entire paper sheet is made of a completely biodegradable material, therefore it is completely biodegradable. Because the bag sheet is a composite of the coating resin layer and the paper layer, the composite strength between the coating resin layer and the paper layer is high, preventing cracking and delamination during bag manufacturing. Furthermore, there is no solvent residue and no odor. Specifically, the PGA coating resin layer on the bag sheet in this packaging bag is used for bonding.

[0007] In summary, this type of packaging bag uses a composite of a coated resin layer and a paper layer, ensuring that the entire bag will not split or crack, and the entire bag is odorless.

[0008] Optionally, the bag body is provided with a sealing chain, which is located inside the bag body and at the bag opening. The sealing chain is parallel to and does not contact the tear line.

[0009] The function of a sealing zipper is to provide a temporary seal after the bag's seal has been torn open.

[0010] Optionally, a heat-sealing part is provided at the edge of the bag body, and an easy-tear opening is provided on the bag body, and the easy-tear opening is located at the heat-sealing part, and the easy-tear opening is triangular in shape.

[0011] The specific tear opening is located on one side of the tear line, allowing the entire bag to be torn open along the tear line. The tear line consists of several laser-sintered points on the bag sheet arranged in a straight line.

[0012] Optionally, a soft magnetic absorbing sheet is also included. The soft magnetic absorbing sheet is disposed on the inner wall of the bag body, and the soft magnetic absorbing sheet is disposed on both sides of the inner wall of the bag body. The magnetic absorbing sheet is located at the bag opening of the bag body, and the soft magnetic absorbing sheet does not contact the tear line. The soft magnetic absorbing sheet is located between the tear line and the bottom of the bag.

[0013] The purpose of the soft magnetic clasps is to attract each other, thereby forming another layer of flexible seal at the bag opening. This, together with the sealing chain, creates a double seal at the bag opening, giving the entire bag better sealing performance.

[0014] When the soft magnetic clasp and sealing chain are made of non-degradable materials, the entire packaging bag is not completely biodegradable.

[0015] Optionally, it may also include a foam padding layer, which is disposed inside the bag body and located at the bottom of the bag body.

[0016] The function of the foam padding layer is to cushion and absorb shock for items placed inside the bag. Specifically, the foam padding layer is made of polyurethane material.

[0017] Optionally, the bag body has a top seal at the opening, and the top seal is strip-shaped.

[0018] The strip-shaped top seal is used to seal the bag opening. Both the top seal and the side seals are areas where the bag panels are heat-bonded together.

[0019] Optionally, a hanging hole is provided at the top seal of the bag body, and the hanging hole is circular.

[0020] The purpose of the hanging holes is to make it easy to hang the entire bag where it needs to be hung.

[0021] Optionally, the thickness of the ink layer is 1 micrometer to 3 micrometers, the thickness of the PGA coating resin layer is 12 micrometers to 60 micrometers, and the thickness of the paper layer is 80 micrometers to 150 micrometers.

[0022] The beneficial effects of this utility model are: in this type of packaging bag, the bag sheet is made of a composite of a coated resin layer and a paper layer, the entire bag body will not split or crack, and the entire bag body has no odor. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is a simplified structural diagram of a biodegradable paper-plastic composite packaging bag;

[0025] Figure 2 This is a simplified schematic diagram of the bag's structure.

[0026] The labels in the attached figures are as follows: 1. Bag sheet; 101. Ink layer; 102. PGA coating resin layer; 103. Paper layer; 11. Side seal; 12. Top seal; 13. Hanging hole; 14. Easy-tear opening; 15. Easy-tear line; 2. Sealing zipper; 3. Soft magnetic closure sheet; 4. Foam pad layer. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0030] As attached Figure 1 and appendix Figure 2 As shown, a biodegradable paper-plastic composite packaging bag includes a bag sheet 1, which is assembled to form a bag body. The bag body has a bag opening. The bag sheet 1 includes a paper layer 103, a PGA coating resin layer 102, and an ink layer 101. The ink layer 101 and the PGA coating resin layer 102 are respectively disposed on both sides of the paper layer 103. The PGA coating resin layer 102 is located inside the bag body, and the ink layer 101 is located outside the bag body. The thickness of the paper layer 103 is greater than the thickness of the PGA coating resin layer 102, and the thickness of the PGA coating resin layer 102 is greater than the thickness of the ink layer 101. An easy-tear line 15 is provided on the bag body, and the easy-tear line 15 is a straight easy-tear line 15.

[0031] In this type of biodegradable paper-plastic composite packaging bag, the bag sheet 1 is composed of a paper layer 103, a PGA coating resin layer 102, and an ink layer 101. The entire paper sheet is made of a completely biodegradable material, therefore it is completely biodegradable. Because the bag sheet 1 is composed of a coating resin layer and a paper layer 103, the composite strength between the coating resin layer and the paper layer 103 is high, preventing cracking and delamination during bag fabrication. Furthermore, there is no solvent residue and no odor. Specifically, the PGA coating resin layer 102 on the bag sheet 1 is used for bonding.

[0032] In summary, in this type of packaging bag, the bag sheet 1 is made of a composite of a coated resin layer and a paper layer 103, so the entire bag will not split or crack, and the entire bag has no odor.

[0033] This packaging bag can be approximated as consisting of two sheets as attached. Figure 1 The bag sheet 1 shown is formed by thermal bonding together.

[0034] As attached Figure 1 and appendix Figure 2 As shown, a sealing chain 2 is provided on the bag body. The sealing chain 2 is located inside the bag body and at the bag opening. The sealing chain 2 and the easy-tear line 15 are parallel and do not contact each other.

[0035] The function of the sealing chain 2 is to provide a temporary seal after the bag's seal is torn open.

[0036] As attached Figure 1 and appendix Figure 2 As shown, a heat-sealed section is provided at the edge of the bag body, and an easy-tear opening 14 is provided on the bag body. The easy-tear opening 14 is located at the heat-sealed section and is triangular in shape.

[0037] Specifically, the easy-tear opening 14 is located on one side of the easy-tear line 15, allowing the entire bag to be torn open along the easy-tear line 15. The easy-tear line 15 consists of several laser-sintered points on the bag piece 1 arranged in a straight line.

[0038] As attached Figure 1 and appendix Figure 2 As shown, it also includes a soft magnetic absorbing sheet 3, which is disposed on the inner wall of the bag body. Both sides of the inner wall of the bag body are provided with soft magnetic absorbing sheets 3. The magnetic absorbing sheets are located at the bag opening, and the soft magnetic absorbing sheets 3 do not contact the easy-tear line 15. The soft magnetic absorbing sheets 3 are located between the easy-tear line 15 and the bottom of the bag.

[0039] The function of the soft magnetic absorbing sheet 3 is to attract each other, thereby forming another layer of flexible seal at the bag opening. This works together with the sealing chain 2 to form a double seal at the bag opening, thus giving the entire bag a better sealing performance.

[0040] When the soft magnetic absorbing sheet 3 and the sealing clamp 2 are made of non-degradable materials, the entire packaging bag is not completely degradable.

[0041] As attached Figure 1 and appendix Figure 2 As shown, it also includes a foam padding layer 4, which is disposed inside the bag and located at the bottom of the bag.

[0042] The function of the foam padding layer 4 is to cushion and absorb shock for the items placed in the bag. Specifically, the foam padding layer 4 is made of polyurethane material.

[0043] As attached Figure 1 and appendix Figure 2 As shown, a top seal 12 is provided at the opening of the bag body, and the top seal 12 is strip-shaped.

[0044] The strip-shaped top seal 12 is used to seal the bag opening. Both the top seal 12 and the side seal 11 are areas where the bag sheet 1 is heat-bonded together.

[0045] As attached Figure 1 and appendix Figure 2 As shown, a hanging hole 13 is provided at the top seal 12 of the bag body. The hanging hole 13 is a circular hanging hole 13.

[0046] The function of the hanging hole 13 is to facilitate hanging the entire bag where it needs to be hung.

[0047] As attached Figure 1 and appendix Figure 2 As shown, the ink layer 101 has a thickness of 1 micrometer to 3 micrometers, the PGA coating resin layer 102 has a thickness of 12 micrometers to 60 micrometers, and the paper layer 103 has a thickness of 80 micrometers to 150 micrometers.

[0048] In this specific embodiment, other biodegradable resins can also be used instead of PGA coating resin. These include, but are not limited to, polylactic acid or polycaprolactone.

[0049] The above-described embodiments only illustrate some aspects of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A biodegradable paper-plastic composite packaging bag, comprising bag sheets, the bag sheets being fitted together to form a bag body, the bag body having a bag opening, characterized in that, The bag sheet includes a paper layer, a PGA coating resin layer, and an ink layer. The ink layer and the PGA coating resin layer are respectively disposed on both sides of the paper layer. The PGA coating resin layer is located inside the bag, and the ink layer is located outside the bag. The thickness of the paper layer is greater than the thickness of the PGA coating resin layer, and the thickness of the PGA coating resin layer is greater than the thickness of the ink layer. The bag body is provided with an easy-tear line, and the easy-tear line is a straight line.

2. The biodegradable paper-plastic composite packaging bag according to claim 1, characterized in that, The bag body is provided with a sealing zipper, which is located inside the bag and at the bag opening. The sealing zipper is parallel to and does not contact the tear line.

3. The biodegradable paper-plastic composite packaging bag according to claim 2, characterized in that, The bag body has a heat-sealed section at its edge, and an easy-tear opening is provided on the bag body. The easy-tear opening is located at the heat-sealed section and is triangular in shape.

4. The biodegradable paper-plastic composite packaging bag according to claim 1, characterized in that, It also includes a soft magnetic absorbing sheet, which is disposed on the inner wall of the bag body, and the soft magnetic absorbing sheet is disposed on both sides of the inner wall of the bag body. The magnetic absorbing sheet is located at the bag opening, and the soft magnetic absorbing sheet does not contact the tear line. The soft magnetic absorbing sheet is located between the tear line and the bottom of the bag.

5. A biodegradable paper-plastic composite packaging bag according to claim 1, characterized in that, It also includes a foam padding layer, which is disposed inside the bag body and located at the bottom of the bag body.

6. The biodegradable paper-plastic composite packaging bag according to claim 1, characterized in that, The bag body has a top seal at the opening, and the top seal is strip-shaped.

7. A biodegradable paper-plastic composite packaging bag according to claim 6, characterized in that, The top seal of the bag body has a hanging hole, which is circular.

8. A biodegradable paper-plastic composite packaging bag according to claim 6, characterized in that, The thickness of the ink layer is 1 micrometer to 3 micrometers, the thickness of the PGA coating resin layer is 12 micrometers to 60 micrometers, and the thickness of the paper layer is 80 micrometers to 150 micrometers.

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