Plastic-substituted paper oil-proof heat-seal packaging bag

Abstract

The utility model discloses an oil-proof heat-sealing packaging bag made of plastic substitute paper, which belongs to the technical field of packaging bags and comprises a packaging bag body and oil-proof plastic substitute paper, the oil-proof plastic substitute paper is folded, bonded and fixed to form the packaging bag body, and a plurality of adhesive tapes formed by bonding the edges of the oil-proof plastic substitute paper are arranged on the surface of the packaging bag body. The interior of the packaging bag body is hollow to form a sealed packaging cavity; the oil-proof plastic paper is sequentially composed of an oil absorption layer, an inner protection layer, a body paper layer and an outer protection layer in the thickness direction, a plurality of permeation holes are formed in the oil absorption layer in a penetrating mode, a heat sealing belt is wound around the edge of the oil absorption layer, and the oil absorption layer is located on the inner side of the packaging bag body. A grease layer or a plurality of grease drops are prevented from being formed in the packaging bag body through the oil absorption layer of the oil-proof plastic paper, and the hands of a user can be kept clean when the user takes food in the packaging bag body.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bags, in particular to an oil-proof heat-sealed packaging bag made of plastic-substitute paper. Background Art

[0002] Food packaging bags are an integral part of food commodities. Packaging bags play a good barrier and protection role for food, so that the food maintains stable quality during the circulation process from leaving the factory to the hands of consumers. At the same time, the materials used to make packaging bags need to prevent the penetration of liquids such as grease and water to prevent the strength of the packaging materials from being reduced due to liquid penetration. However, since the packaging materials have the ability to prevent liquid penetration, when packaging bags are used to package baked goods, spicy snacks and other foods that usually contain more oil, a layer of grease will adhere to the inner wall of the packaging bags, causing consumers to put their hands into the packaging bags to take food, and the back of their hands and other places will also be stained with grease, affecting hand hygiene.

[0003] A Chinese patent with publication number CN213567646U discloses a water-resistant and oil-proof packaging bag, including a bag body, which is a double-layer structure, including an outer paper and an inner paper, a sealing paper connected to the outer paper, and the inner paper is oil-proof paper, and the inner paper and the outer paper are tightly fitted outside the separation area; the above-mentioned packaging bag prevents the bag body from being penetrated by liquids such as grease through the inner layer of oil-proof paper, but when the packaging bag is used to package food containing grease, the grease in the food is easily attached to the inner wall of the packaging bag to form a grease layer, and when the user puts his hand into the packaging bag to take the food, it is easy to cause his hand to be stuck with grease, affecting hand hygiene, so there is still room for improvement. Utility Model Content

[0004] In view of the technical defects existing in the background technology, the utility model proposes a plastic-free paper oil-proof heat-seal packaging bag, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0005] An oil-proof heat-sealable packaging bag made of plastic substitute paper, comprising a packaging bag body and oil-proof plastic substitute paper, wherein the oil-proof plastic substitute paper is folded, bonded and fixed to form the packaging bag body, a plurality of adhesive strips formed by bonding the edges of the oil-proof plastic substitute paper are provided on the surface of the packaging bag body, and the interior of the packaging bag body is hollow to form a sealed packaging cavity;

[0006] The oil-proof plastic-substitute paper is composed of an oil-absorbing layer, an inner protective layer, a base paper layer and an outer protective layer in sequence along the thickness direction; the oil-absorbing layer is penetrated with a plurality of penetration holes, a heat-sealing belt is wrapped around the edge of the oil-absorbing layer, and the oil-absorbing layer is located inside the packaging bag body.

[0007] As a further technical solution of the utility model, a tear strip is provided on one side of the top of the packaging bag body, and the tear strip is located below the adhesive tape on the top of the packaging bag body.

[0008] As a further technical solution of the utility model, an extrusion sealing strip is provided on the top inner side of the packaging bag body, and the extrusion sealing strip is composed of a sealing groove and a sealing strip that match each other. The sealing groove and the sealing strip are respectively fixedly connected to the two opposite sides of the inner wall of the packaging bag body, and the extrusion sealing strip is located below the tear strip.

[0009] As a further technical solution of the utility model, a handle opening is penetrated through the adhesive tape on the top of the packaging bag body.

[0010] As a further technical solution of the utility model, the aperture of the penetration hole gradually decreases from one side close to the inner protective layer to the other side.

[0011] As a further technical solution of the utility model, the heat sealing belt is formed by extending the inner protective layer outward along the edge of the oil absorbing layer, and the inner protective layer and the outer protective layer completely cover both sides of the base paper layer respectively.

[0012] As a further technical solution of the utility model, the heat sealing belt is formed by coating a heat sealing material on the edge of the oil absorbing layer, and the heat sealing belt is arranged on the side of the oil absorbing layer away from the inner protective layer.

[0013] As a further technical solution of the utility model, the surface of the base paper layer is intermittently or completely covered with printing ink to form a printing surface, and the printing surface is located between the base paper layer and the outer protective layer.

[0014] The beneficial effects of the utility model are:

[0015] The packaging bag body of the utility model is mainly used as the outer packaging of foods with high oil content. The packaging bag body is made of oil-proof plastic-substitute paper through folding, gluing and fixing. The oil absorption layer of the oil-proof plastic-substitute paper is arranged on the inner wall of the packaging bag body. The oil absorption layer efficiently absorbs and locks the oil through its own oil absorption performance and a plurality of penetration holes, thereby avoiding the formation of an oil layer or a plurality of oil droplets on the inner wall of the packaging bag body. The user can better keep his hands clean when taking the food in the packaging bag body. In addition, the oil-proof plastic-substitute paper prevents liquid from penetrating into the base paper layer through the inner protective layer and the outer protective layer, thereby avoiding the reduction of strength of the base paper layer due to liquid infiltration, thereby ensuring the strength of the oil-proof plastic-substitute paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a structural schematic diagram of a plastic-substitute paper oil-proof heat-seal packaging bag.

[0017] Figure 2 The schematic diagram of the structure of a plastic-free paper oil-proof heat-seal packaging bag from another angle.

[0018] Figure 3 The present invention is a cross-sectional view of a plastic-substitute paper oil-proof heat-seal packaging bag.

[0019] Figure 4 yes Figure 3 Partial schematic diagram at point A in the middle.

[0020] Figure 5 The invention discloses a structural schematic diagram of an oil-proof plastic substitute paper for an oil-proof heat-sealable packaging bag made of plastic substitute paper.

[0021] Figure 6 The present invention is a structural schematic diagram of a second embodiment of an oil-proof plastic-substitute paper for an oil-proof heat-sealable packaging bag made of plastic-substitute paper.

[0022] Among them: packaging bag body 1, adhesive tape 11, packaging cavity 12, tear strip 13, extrusion sealing strip 14, sealing groove 141, sealing strip 142, handle 15, oil-proof plastic-substitute paper 2, oil absorption layer 21, penetration hole 211, inner protective layer 22, base paper layer 23, outer protective layer 24, heat sealing tape 25, printing surface 26. DETAILED DESCRIPTION

[0023] The implementation methods of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0024] like Figure 1-5 As shown, an oil-proof heat-seal packaging bag made of plastic-substitute paper comprises a packaging bag body 1 and an oil-proof plastic-substitute paper 2. The oil-proof plastic-substitute paper 2 is folded, bonded and fixed to form the packaging bag body 1. The surface of the packaging bag body 1 is provided with an adhesive tape 11 formed by bonding the edges of the oil-proof plastic-substitute paper 2. The interior of the packaging bag body 1 is hollow to form a sealed packaging cavity 12. The oil-proof plastic-substitute paper 2 is composed of an oil-absorbing layer 21, an inner protective layer 22, a base paper layer 23 and an outer protective layer 24 in the thickness direction. The oil-absorbing layer 21 is penetrated with a plurality of penetration holes 211. A heat-sealing tape 25 is wrapped around the edge of the oil-absorbing layer 21. The oil-absorbing layer 21 is located on the inner side of the packaging bag body 1.

[0025] The utility model is mainly used as the outer packaging of food and other products, and can replace the outer packaging of the commonly used plastic materials. It is preferably used for the outer packaging of baked food, spicy snacks and other foods that usually contain more oil. The packaging bag body 1 is the main structure of the outer packaging. It is made by cutting the oil-proof plastic-substitute paper 2 to a fixed size, folding, and gluing it. The heat-sealing tape 25 is formed by coating the edge of the oil-absorbing layer 21 with a heat-sealing material. The heat-sealing tape 25 is arranged on the side of the oil-absorbing layer 21 away from the inner protective layer 22. The heat-sealing tape 25 can be made of one of a starch-based heat-sealing material and a cellulose-based heat-sealing material and is coated on the edge of the oil-absorbing layer 21 to form the packaging bag body; During the bonding process, the heat-sealing tape 25 at the edge of the oil-proof plastic-substitute paper 2 is heated to have adhesiveness and bonded to form an adhesive tape 11 and bonded and fixed, thereby forming a packaging bag body 1 with food inside. The packaging cavity 12 is a space in the packaging bag body 1 for accommodating food. During the food packaging process, the oil-proof plastic-substitute paper 2 is first bonded and fixed to form a prototype of the packaging bag body 1, and an entrance that allows food to enter the packaging cavity 12 is reserved. The food is placed in the packaging cavity 12 from the entrance, and then the entrance is bonded and fixed to the adhesive tape 11 through the heat-sealing tape 25, so that a sealed packaging cavity 12 is formed in the packaging bag body 1, and the food is packaged.

[0026] After adopting the above structure, it is necessary to further explain that, in the common paper food outer packaging, its inner wall usually needs to be provided with a protective layer to prevent liquid penetration. Although it can well prevent the penetration of grease, water, etc. and ensure the strength of the outer packaging and the cleanliness of the surface, if the food contains more grease, a grease layer or a plurality of grease drops will be formed on the inner wall after the food contacts the inner wall of the outer packaging. When the user takes the food in the package, it is easy to cause grease to adhere to various parts of the hands, affecting the user experience and hygiene. In the oil-proof plastic-substitute paper 2 of the utility model, the oil-absorbing layer 21 is arranged on the inner side of the packaging bag body 1, that is, the oil-absorbing layer 21 is used as The inner wall of the packaging cavity 12, the oil absorption layer 21 is preferably made of common food oil absorption paper. The oil absorption layer 21 can absorb and lock excess oil on the surface of the food, and the multiple penetration holes 211 on the surface of the oil absorption layer 21 can utilize the capillary effect to efficiently absorb the oil into the oil absorption layer 21, thereby improving the efficiency of the oil absorption layer 21 in absorbing oil, and firmly fixing the oil inside the oil absorption layer 21, thereby preventing the oil from forming a grease layer or multiple grease droplets on the inner wall of the packaging cavity 12, keeping the inner wall of the packaging cavity 12 dry, thereby preventing the user from having grease attached to various parts of the hands when taking the food in the package, and keeping the hands hygienic.

[0027] Furthermore, in the oil-proof plastic-substitute paper 2, the base paper layer 23 can be optionally made of wood pulp paper or kraft paper, and an inner protective layer 22 and an outer protective layer 24 are formed by coating the surfaces of both sides of the base paper layer 23 with a starch-based barrier material or a cellulose-based barrier material. The inner protective layer 22 and the outer protective layer 24 can prevent grease, moisture, etc. from penetrating into the base paper layer 23, and can avoid gas penetration, thereby improving the oil-proof, waterproof, air-tight and other properties of the oil-proof plastic-substitute paper 2. At the same time, the heat-sealing tape 25, the oil-absorbing layer 21, the base paper layer 23, the inner protective layer 22, and the outer protective layer 24 are all made of degradable materials, so that the oil-proof plastic-substitute paper 2 can be completely naturally degraded in the natural environment, thereby replacing the currently common packaging materials that are difficult to degrade and improving environmental protection.

[0028] To sum up, the packaging bag body 1 of the utility model is mainly used as the outer packaging of food with a high oil content. The packaging bag body 1 is made of oil-proof plastic-substitute paper 2 by folding, gluing and fixing. The oil absorption layer 21 of the oil-proof plastic-substitute paper 2 is arranged on the inner wall of the packaging bag body 1. The oil absorption layer 21 efficiently absorbs and locks the oil through its own oil absorption performance and a plurality of penetration holes 211, thereby avoiding the formation of a grease layer or a plurality of grease droplets on the inner wall of the packaging bag body 1. The user can better keep his hands clean when taking the food in the packaging bag body 1. In addition, the oil-proof plastic-substitute paper 2 prevents liquid from penetrating into the base paper layer 23 through the inner protective layer 22 and the outer protective layer 24, thereby avoiding the reduction of strength of the base paper layer 23 due to liquid infiltration, thereby ensuring the strength of the oil-proof plastic-substitute paper 2.

[0029] like Figure 1-4 As shown, as one of the preferred embodiments of the utility model, a tear strip 13 is provided on one side of the top of the packaging bag body 1, and the tear strip 13 is located below the adhesive tape 11 at the top of the packaging bag body 1; the tear strip 13 is formed after the outer surface of the oil-proof plastic substitute paper 2 is processed by a die-cutting machine. During the processing, the cutting piece will intermittently cut the surface of the oil-proof plastic substitute paper 2 to form a dotted tear line, and the cutting depth is up to the base paper layer 23, but will not penetrate the base paper layer 23 and the inner protective layer 22. The thickness of the oil-proof plastic substitute paper 2 at the position where the tear line is set will be reduced and a tear strip 13 that is easy to tear will be formed. By tearing the tear strip 13, a packaging opening can be formed on the surface of the packaging bag body 1, through which the food in the packaging bag body 1 can be taken out, and the packaging bag body 1 can maintain a high degree of integrity.

[0030] like Figure 3 , 4As shown, as one of the preferred embodiments of the utility model, an extrusion-type sealing strip 14 is provided on the top of the inner side of the packaging bag body 1. The extrusion-type sealing strip 14 is composed of a sealing groove 141 and a sealing strip 142 that match each other. The sealing groove 141 and the sealing strip 142 are respectively fixedly connected to the two opposite sides of the inner wall of the packaging bag body 1, and the extrusion-type sealing strip 14 is located below the tear strip 13; after the tear strip 13 is torn off to form a packaging opening of the packaging bag body 1, the sealing strip 142 is squeezed into the sealing groove 141 to form a closed extrusion-type sealing strip 14, so that the packaging opening remains closed. If the food in the packaging bag body 1 cannot be eaten in a short time, the packaging opening can be kept closed by the extrusion-type sealing strip 14 to prevent the internal food from being contaminated. When it is necessary to continue eating the food, it is only necessary to pull the packaging opening to separate the sealing groove 141 and the sealing strip 142. The extrusion-type sealing strip 14 can improve the convenience of eating and storing the food in the packaging bag body 1.

[0031] like Figure 1 , 2 As shown, as one of the preferred embodiments of the utility model, the adhesive tape 11 on the top of the packaging bag body 1 is provided with a handle opening 15; consumers can pass their fingers through the handle opening 15 to better grasp the packaging bag body 1, thereby improving the convenience for consumers when purchasing products packaged by the packaging bag body 1.

[0032] like Figure 5 , 6 As shown, as one of the preferred embodiments of the utility model, the aperture of the penetration hole 211 gradually decreases from one side close to the inner protective layer 22 to the other side; the inner diameter of the penetration hole 211 on the side away from the inner protective layer 22 is smaller, and the oil absorption layer 21 is in contact with the oil in the food through the side away from the inner protective layer 22. The penetration hole 211 forms a larger surface tension and capillary attraction on the side in contact with the oil through a smaller inner diameter, which efficiently absorbs the oil and locks it inside the penetration hole 211, and then the penetration hole 211 increases the speed at which the oil penetrates into the oil absorption layer 21 through a larger inner diameter, thereby improving the effect of the oil absorption layer 21 absorbing and locking the oil.

[0033] like Figure 6 As shown, as the second preferred implementation of the oil-proof plastic-substitute paper of the utility model, the heat-sealing tape 25 is formed by extending the inner protective layer 22 outward along the edge of the oil-absorbing layer 21, and the inner protective layer 22 and the outer protective layer 24 completely cover the two sides of the base paper layer 23 respectively; the inner protective layer 22 can adopt a starch-based material or a cellulose-based material with heat-sealing properties and barrier properties, so that the inner protective layer 22 has both heat-sealing properties and barrier properties. By extending the inner protective layer 22 outward along the edge of the oil-absorbing layer 21, a heat-sealing tape 25 that can be bonded by heating can be formed, and there is no need to additionally coat the heat-sealing tape 25 on the surface of the oil-absorbing layer 21, thereby reducing the processing difficulty of the oil-proof plastic-substitute paper 2.

[0034] like Figure 5 , 6 As shown, as one of the preferred embodiments of the utility model, the surface of the base paper layer 23 is intermittently or completely covered with printing ink to form a printing surface 26, and the printing surface 26 is located between the base paper layer 23 and the outer protective layer 24; when it is necessary to display product information or add decorative patterns on the surface of the packaging bag body 1, the product information or decorative patterns can be printed on the side of the base paper layer 23 close to the outer protective layer 24 through a printing device, thereby forming a printing surface 26 that intermittently or completely covers the surface of the base paper layer 23.

[0035] 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 protection scope of the present invention.

Claims

1. An oil-proof heat-sealable packaging bag made of plastic-substitute paper, comprising a packaging bag body (1) and oil-proof plastic-substitute paper (2), characterized in that: The oil-proof plastic-substitute paper (2) is folded, bonded and fixed to form a packaging bag body (1); a surface of the packaging bag body (1) is provided with a plurality of adhesive strips (11) formed by bonding the edges of the oil-proof plastic-substitute paper (2); the interior of the packaging bag body (1) is hollow to form a sealed packaging cavity (12); The oil-proof plastic-substitute paper (2) is composed of an oil-absorbing layer (21), an inner protective layer (22), a base paper layer (23), and an outer protective layer (24) in sequence along the thickness direction; the oil-absorbing layer (21) is provided with a plurality of penetration holes (211); a heat-sealing tape (25) is provided around the edge of the oil-absorbing layer (21); and the oil-absorbing layer (21) is located on the inner side of the packaging bag body (1).

2. The plastic-free paper oil-proof heat-seal packaging bag according to claim 1, characterized in that: A tear strip (13) is provided on one side of the top of the packaging bag body (1), and the tear strip (13) is located below the adhesive tape (11) on the top of the packaging bag body (1).

3. The plastic-free paper oil-proof heat-seal packaging bag according to claim 2, characterized in that: An extrusion-type sealing strip (14) is provided at the top of the inner side of the packaging bag body (1), and the extrusion-type sealing strip (14) is composed of a sealing groove (141) and a sealing strip (142) that match each other. The sealing groove (141) and the sealing strip (142) are respectively fixedly connected to two opposite sides of the inner wall of the packaging bag body (1), and the extrusion-type sealing strip (14) is located below the tear strip (13).

4. The plastic-free paper oil-proof heat-seal packaging bag according to claim 1, characterized in that: The adhesive tape (11) on the top of the packaging bag body (1) is provided with a handle opening (15).

5. The plastic-free paper oil-proof heat-seal packaging bag according to claim 1, characterized in that: The aperture of the penetration hole (211) gradually decreases from one side close to the inner protective layer (22) to the other side.

6. The plastic-paper oil-proof heat-seal packaging bag according to claim 1, characterized in that: The heat-sealing belt (25) is formed by the inner protective layer (22) extending outward along the edge of the oil-absorbing layer (21), and the inner protective layer (22) and the outer protective layer (24) completely cover both sides of the base paper layer (23) respectively.

7. The plastic-free paper oil-proof heat-seal packaging bag according to claim 1, characterized in that: The heat-sealing belt (25) is formed by coating a heat-sealing material on the edge of the oil-absorbing layer (21), and the heat-sealing belt (25) is arranged on a side of the oil-absorbing layer (21) away from the inner protective layer (22).

8. The plastic-substitute paper oil-proof heat-seal packaging bag according to claim 1, characterized in that: The surface of the base paper layer (23) is intermittently or completely covered with printing ink to form a printing surface (26), and the printing surface (26) is located between the base paper layer (23) and the outer protective layer (24).

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