Heat-sealing plastic packaging paper

Abstract

The utility model discloses heat-sealing plastic-replacing packaging paper, which belongs to the technical field of packaging paper and comprises base paper, a functional layer and a first heat-sealing layer are arranged on the upper surface of the base paper, the functional layer and the first heat-sealing layer jointly completely cover the upper surface of the base paper, the first heat-sealing layer extends along the edge of the upper surface of the base paper, and a blocking layer and a second heat-sealing layer are arranged on the lower surface of the base paper. The barrier layer and the second heat-sealing layer completely cover the lower surface of the base paper together, and the second heat-sealing layer extends along the edge of the lower surface of the base paper; the functional layer can improve the physical protection performance of the packaging paper, the blocking layer enables the packaging paper to have good blocking performance, the first heat sealing layer and the second heat sealing layer are heated by an external heat source to be bonded to each other to make the packaging paper into the packaging bag, and the packaging bag is firm in structure, good in sealing performance and good in degradation performance. The packaging bag can replace plastic to serve as outer packages of various products.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging paper, in particular to a heat-sealed plastic-substitute packaging paper. Background Art

[0002] At present, the outer packaging of sanitary products, medical supplies, food and other products is mostly made of plastic materials. These plastic materials are usually not easy to degrade and are not environmentally friendly. Wood pulp paper, as a product made of natural raw materials, is completely degradable, making it an ideal packaging material. However, the barrier properties and protective properties of current packaging paper and plastic packaging materials are quite different. Packaging paper is easily corroded by water vapor in humid environments for a long time, and it is difficult for packaging paper to protect the products in the package from external factors such as water vapor for a long time. Therefore, most packaging paper is used to package products that only require short-term protection, and it is still difficult to replace plastic packaging and be used for products that require long-term protection.

[0003] A Chinese patent with publication number CN212530653U discloses a fully degradable heat-sealed packaging paper bag, comprising a bag body, the bag body comprising degradable paper, the degradable paper being folded in half to form two bag surfaces, the bottoms of the two bag surfaces and one of the sides being connected together by hot pressing, the tops of the two bag surfaces forming a bag opening, the degradable paper comprising a paper layer, a degradable degradation promoter layer, a straw layer, and a polypropylene non-woven fabric layer; the packaging paper bag is made of degradable paper, which can improve the environmental friendliness of the packaging bag, but the packaging paper bag has a certain air permeability, and it is difficult to isolate the product in the package from the outside world, and it is difficult to be used for packaging sanitary products, medical supplies, most foods, and other products that need to be isolated from the outside world for storage, and has great limitations in use, 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 heat-sealed plastic-substitute packaging paper, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0005] A heat-seal plastic-substitute packaging paper, comprising a base paper, wherein a functional layer and a first heat-seal layer are provided on the upper surface of the base paper, wherein the functional layer and the first heat-seal layer together completely cover the upper surface of the base paper, and the first heat-seal layer extends along the edge of the upper surface of the base paper;

[0006] A barrier layer and a second heat-sealing layer are provided on the lower surface of the base paper. The barrier layer and the second heat-sealing layer completely cover the lower surface of the base paper together. The second heat-sealing layer extends along the edge of the lower surface of the base paper.

[0007] As a further technical solution of the utility model, the base paper is selected from wood pulp paper with a grammage of 15-60g / m2.

[0008] As a further technical solution of the utility model, a printing layer is provided between the base paper and the functional layer, and the printing layer completely or partially covers the upper surface of the base paper. The printing layer is formed by solidification of printing ink.

[0009] As a further technical solution of the utility model, the functional layer is formed by solidifying the functional additive, and the functional additive is composed of one or more of a waterproofing agent, a sunscreen additive, a wear-resistant additive, and a high-temperature resistant additive. The first heat-sealing layer is arranged on the upper surface of the functional layer.

[0010] As a further technical solution of the utility model, a compliant layer is provided between the base paper and the barrier layer, the compliant layer completely covers the lower surface of the base paper, the compliant layer is formed by solidifying the softener, and part of the softener penetrates into the base paper.

[0011] As a further technical solution of the utility model, the second heat-sealing layer is arranged on the lower surface of the barrier layer, and the barrier layer and the second heat-sealing layer completely cover the lower surface of the base paper. The barrier layer is formed by curing the barrier material, and the barrier material is selected from one or more of starch-based barrier materials, cellulose-based barrier materials, and chitosan-based barrier materials.

[0012] As a further technical solution of the utility model, the first heat-sealing layer and the second heat-sealing layer are both formed by solidifying a heat-sealing material, and the heat-sealing material is selected from a starch-based heat-sealing material and a cellulose-based heat-sealing material.

[0013] The beneficial effects of the utility model are:

[0014] The utility model has a functional layer and a first heat-sealing layer with good protective performance on the upper surface of the base paper, and a barrier layer and a second heat-sealing layer with good barrier performance on the lower surface of the base paper, so as to form packaging paper that can be used to make product outer packaging. The functional layer can improve the strength of the outer surface of the packaging paper, thereby improving the physical protective performance of the packaging paper. The barrier layer prevents gases, liquids and other substances from penetrating the packaging paper, so that the packaging paper has good barrier performance and improves the quality guarantee period of the internal products of the packaging. The first heat-sealing layer and the second heat-sealing layer are heated and bonded to each other by an external heat source to make the packaging paper into a packaging bag. The packaging bag has a firm structure and good sealing performance, and has good degradation performance, and can replace plastics as the outer packaging of various products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of heat-sealed plastic-substitute packaging paper.

[0016] Figure 2 It is a schematic diagram of the second structure of heat-sealed plastic-substitute packaging paper.

[0017] Figure 3It is a schematic diagram of the third structure of heat-sealed plastic-substitute packaging paper.

[0018] Wherein: base paper 1, functional layer 2, first heat sealing layer 3, barrier layer 4, second heat sealing layer 5, printing layer 6, and soft layer 7. DETAILED DESCRIPTION

[0019] 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.

[0020] like Figure 1 As shown, a heat-seal plastic-substitute packaging paper comprises a base paper 1, a functional layer 2 and a first heat-seal layer 3 are provided on the upper surface of the base paper 1, the functional layer 2 and the first heat-seal layer 3 together completely cover the upper surface of the base paper 1, and the first heat-seal layer 3 extends along the edge of the upper surface of the base paper 1; a barrier layer 4 and a second heat-seal layer 5 are provided on the lower surface of the base paper 1, the barrier layer 4 and the second heat-seal layer 5 together completely cover the lower surface of the base paper 1, and the second heat-seal layer 5 extends along the edge of the lower surface of the base paper 1.

[0021] The packaging paper of the utility model is used for making outer packaging of products such as sanitary products, medical products, and foods. The raw materials used in the base paper 1 include but are not limited to softwood pulp, hardwood pulp, cotton pulp, and recycled paper pulp. The raw materials are subjected to the steps of pulping, sand removal, grinding, screen-surface, pressing, drying, and the like to finally obtain the base paper 1. Fibers with high strength and no effect on the degradation performance of the packaging paper, such as hemp fiber and bamboo fiber, can be added to the raw materials to improve the mechanical strength of the packaging paper. The first heat-sealing layer 3 and the second heat-sealing layer 5 are coated on the edge of the surface of the base paper 1 after the thermoplastic material is melted, and the first heat-sealing layer 3 or the second heat-sealing layer 5 is heated to melt by an external heat source, and the opposite edges of the packaging paper are overlapped and bonded to each other by the melted thermoplastic material to form a cylindrical shape, and then one end of the cylindrical packaging paper is heated and bonded as a bottom to form a packaging bag with an opening, and then the product is put into the packaging bag, and finally the opening of the packaging bag is heated and bonded to complete the packaging, and the heat-sealing material can firmly bond the openings of the packaging bag, and a sealed space for accommodating the product is formed inside the packaging bag, and the packaging bag has good sealing and firmness.

[0022] One side of the wrapping paper coated with the functional layer 2 serves as the outer surface of the product outer packaging. The functional layer 2 is formed by coating a functional additive on the upper surface of the base paper 1 and solidifying it. The functional additive is selected from one or more of a waterproof agent, a sunscreen additive, a wear-resistant additive, and a high-temperature resistant additive. According to the different functions of the outer packaging required by the product properties, the functional layer 2 can have one or more functions of waterproofing, sunscreen, wear resistance, and high temperature resistance according to the composition of the functional additive, so that the wrapping paper can be suitable for packaging more different types of products and has better physical protection performance; one side of the wrapping paper coated with the barrier layer 4 serves as the inner side of the product outer packaging. The barrier layer 4 is formed by coating a barrier material on the lower surface of the base paper 1 and solidifying it. The barrier layer 4 can prevent gases, liquids and other substances from penetrating the wrapping paper, thereby isolating the product inside the outer packaging from the outside world, avoiding premature deterioration of the product in the packaging, and improving the shelf life of the product. At the same time, if the wrapping paper is used to package food products, the barrier layer 4 prevents substances such as oil and water in the food from penetrating into the base paper 1.

[0023] The upper surface of the base paper 1 of the utility model is coated with a functional layer 2 and a first heat-sealing layer 3 with good protective performance, and the lower surface of the base paper 1 is coated with a barrier layer 4 and a second heat-sealing layer 5 with good barrier performance, so as to form packaging paper that can be used to make product outer packaging. The functional layer 2 can improve the strength of the outer surface of the packaging paper, thereby improving the physical protective performance of the packaging paper. The barrier layer 4 prevents gases, liquids and other substances from penetrating the packaging paper, so that the packaging paper has good barrier performance and improves the shelf life of the product inside the packaging. The first heat-sealing layer 3 and the second heat-sealing layer 5 are heated and bonded to each other by an external heat source to make the packaging paper into a packaging bag. The packaging bag has a firm structure and good sealing performance, and has good degradation performance, and can replace plastics as the outer packaging of various products.

[0024] Furthermore, since only some parts of the wrapping paper are bonded when making the packaging bag, the first heat-sealing layer 3 and the second heat-sealing layer 5 can be applied according to the parts that need to be bonded when making the packaging bag, and the bonding part can be coated with heat-sealing material on one side or on both sides. Coating heat-sealing material on one side can reduce the amount of heat-sealing material used and reduce costs, but this method may result in loose bonding at the bonding part. Therefore, it is preferred to coat heat-sealing material on both sides of the bonding part to improve the bonding firmness at the bonding part, thereby improving the sealing of the packaging bag.

[0025] As one of the preferred embodiments of the present invention, the base paper 1 is made of wood pulp paper with a grammage of 15-60 g / m2.

[0026] The raw materials used for the base paper 1 of the utility model include but are not limited to coniferous wood pulp, broadleaf wood pulp, cotton pulp, and recycled pulp. The wood pulp paper obtained by the steps of pulping, sand removal, grinding, screen making, pressing, drying and the like can be used as the base paper 1. The grammage of the base paper 1 can be adjusted according to the strength required for the outer packaging. The base paper 1 with a lower grammage has a lower strength and is suitable for products with low requirements for the strength of the outer packaging or short-term packaging. The base paper 1 with a higher grammage has a higher strength and is suitable for products with high requirements for the strength of the outer packaging or long-term packaging.

[0027] like Figure 1 , 2 As shown, as one of the preferred embodiments of the utility model, a printing layer 6 is provided between the base paper 1 and the functional layer 2, and the printing layer 6 completely or partially covers the upper surface of the base paper 1, and the printing layer 6 is formed by solidification of printing ink.

[0028] The printing layer 6 of the utility model is formed by printing ink on the upper surface of the base paper 1 through a printing device and solidifying. The printing layer 6 forms a plurality of small patterns or large patterns on the surface of the packaging paper. Figure 2 It is a schematic diagram of the second structure of ecological paper. When the printing layer 6 partially covers the upper surface of the base paper 1, the printing layer 6 is a plurality of small patterns, which can serve as decoration and display the corresponding information of the product. When the printing layer 6 completely covers the upper surface of the base paper 1, the printing layer 6 is usually a large pattern, which can contain more patterns and product information, thereby having a better decorative effect and display effect. The upper surface of the printing layer 6 is covered by the functional layer 2, which can isolate the outside world from the printing layer 6 to prevent the printing layer 6 from coming into contact with external objects and falling off.

[0029] As one of the preferred embodiments of the utility model, the functional layer 2 is formed by solidifying the functional additive, and the functional additive is composed of one or more of a waterproofing agent, a sunscreen additive, a wear-resistant additive, and a high-temperature resistant additive. The first heat-sealing layer 3 is arranged on the upper surface of the functional layer 2.

[0030] The functional layer 2 of the utility model is formed by coating a functional additive on the upper surface of the base paper 1 and solidifying it. The functional layer 2 has one or more functions of waterproofing, sun protection, wear resistance, and high temperature resistance according to the composition of the functional additive. The functional layer 2 completely covers the upper surface of the base paper 1, so that the packaging paper has good waterproofing, sun protection, wear resistance, and high temperature resistance. The first heat-sealing layer 3 on the upper surface of the functional layer 2 is bonded to other first heat-sealing layers 3 or second heat-sealing layers 5 by heating, so that the packaging paper forms a packaging bag.

[0031] Further, Figure 3It is a schematic diagram of the third structure of ecological paper. The first heat sealing layer 3 and the functional layer 2 can be alternately arranged on the upper surface of the base paper 1, that is, the first heat sealing layer 3 and the functional layer 2 are both arranged on the upper surface of the base paper 1, but the first heat sealing layer 3 and the functional layer 2 together completely cover the upper surface of the base paper 1, which can reduce the coverage area of ​​the functional layer 2 and the coating amount of the functional additive, but does not affect the performance of the packaging paper while reducing the production cost of the packaging paper.

[0032] like Figure 1 As shown, as one of the preferred embodiments of the utility model, a soft layer 7 is provided between the base paper 1 and the barrier layer 4, and the soft layer 7 completely covers the lower surface of the base paper 1. The soft layer 7 is formed by solidifying the softener, and part of the softener penetrates into the base paper 1.

[0033] The soft layer 7 of the utility model can improve the softness of the wrapping paper. The softener is coated on the lower surface of the base paper 1 and interacts with the internal fibers of the base paper 1, thereby improving the smoothness and softness of the base paper 1. Part of the softener solidifies on the lower surface of the base paper 1 to form the soft layer 7, and the soft layer 7 can protect and enhance the smoothness. The softener is coated on the lower surface of the base paper 1, so that the softener penetrates from the lower surface of the base paper 1 to the inside of the base paper 1, so that the soft layer 7 is formed on the lower surface of the base paper 1, which can avoid the contact between the softener and the printing layer 6 when the softener is coated, causing the printing ink to dissolve in the softener, thereby improving the clarity of the pattern in the printing layer 6.

[0034] As one of the preferred embodiments of the utility model, the second heat-sealing layer 5 is arranged on the lower surface of the barrier layer 4, and the barrier layer 4 and the second heat-sealing layer 5 completely cover the lower surface of the base paper 1. The barrier layer 4 is formed by curing the barrier material, and the barrier material is selected from one or more of starch-based barrier materials, cellulose-based barrier materials, and chitosan-based barrier materials.

[0035] The utility model forms a barrier layer 4 by coating a barrier material on the lower surface of a base paper 1 and solidifying the barrier material. The barrier layer 4 completely covers the lower surface of the base paper 1. The barrier material is selected from one or more of a starch-based barrier material, a cellulose-based barrier material, and a chitosan-based barrier material with good degradation performance, so that the packaging paper can well avoid the penetration of gas, liquid and other substances and has good barrier performance, and also has good degradation performance; the second heat-sealing layer 5 on the lower surface of the barrier layer 4 is bonded to the other second heat-sealing layer 5 or the first heat-sealing layer 3 by heating, so that the packaging paper forms a packaging bag.

[0036] Further, Figure 3This is a schematic diagram of the third structure of ecological paper. The second heat-sealing layer 5 and the barrier layer 4 can be alternately arranged on the lower surface of the base paper 1, that is, the second heat-sealing layer 5 and the barrier layer 4 are both arranged on the lower surface of the base paper 1, but the second heat-sealing layer 5 and the barrier layer 4 together completely cover the lower surface of the base paper 1, which can reduce the coverage area of ​​the barrier layer 4 and the coating amount of the barrier material, but does not affect the barrier properties of the packaging paper while reducing the production cost of the packaging paper.

[0037] As one of the preferred embodiments of the present invention, the first heat-sealing layer 3 and the second heat-sealing layer 5 are both formed by solidifying a heat-sealing material, and the heat-sealing material is selected from a starch-based heat-sealing material and a cellulose-based heat-sealing material.

[0038] The utility model forms a first heat-sealing layer 3 and a second heat-sealing layer 5 by coating a heat-sealing material on the surface of a base paper 1 having a functional layer 2 and a barrier layer 4 and solidifying the heat-sealing material. The first heat-sealing layer 3 and the second heat-sealing layer 5 enable the packaging paper to be heated and bonded into a packaging bag by an external heat source. The heat-sealing material is selected from a starch-based heat-sealing material and a cellulose-based heat-sealing material with good degradation performance, so that the packaging paper has good degradation performance.

[0039] 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. A heat-seal plastic packaging paper, comprising a base paper (1), characterized in that: The upper surface of the base paper (1) is provided with a functional layer (2) and a first heat-sealing layer (3), the functional layer (2) and the first heat-sealing layer (3) together completely cover the upper surface of the base paper (1), and the first heat-sealing layer (3) extends along the edge of the upper surface of the base paper (1); The lower surface of the base paper (1) is provided with a barrier layer (4) and a second heat-sealing layer (5); the barrier layer (4) and the second heat-sealing layer (5) together completely cover the lower surface of the base paper (1); and the second heat-sealing layer (5) extends along the edge of the lower surface of the base paper (1).

2. The heat-sealed plastic packaging paper according to claim 1, characterized in that: The base paper (1) has a grammage of 15-60 g / m 2 of wood pulp paper.

3. The heat-sealed plastic packaging paper according to claim 1, characterized in that: A printing layer (6) is provided between the base paper (1) and the functional layer (2), wherein the printing layer (6) completely or partially covers the upper surface of the base paper (1), and the printing layer (6) is formed by solidification of printing ink.

4. The heat-sealed plastic packaging paper according to claim 1, characterized in that: The functional layer (2) is formed by solidifying the functional auxiliary agent, and the first heat-sealing layer (3) is arranged on the upper surface of the functional layer (2).

5. The heat-sealed plastic packaging paper according to claim 1, characterized in that: A compliant layer (7) is provided between the base paper (1) and the barrier layer (4), wherein the compliant layer (7) completely covers the lower surface of the base paper (1), and the compliant layer (7) is formed by solidifying a softener, with a portion of the softener penetrating into the interior of the base paper (1).

6. The heat-sealed plastic packaging paper according to claim 1, characterized in that: The second heat-sealing layer (5) is arranged on the lower surface of the barrier layer (4); the barrier layer (4) and the second heat-sealing layer (5) completely cover the lower surface of the base paper (1); and the barrier layer (4) is formed by curing the barrier material.

7. The heat-sealed plastic packaging paper according to claim 1, characterized in that: The first heat-sealing layer (3) and the second heat-sealing layer (5) are both formed by solidifying a heat-sealing material, wherein the heat-sealing material is selected from a starch-based heat-sealing material and a cellulose-based heat-sealing material.

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