High-toughness durable plastic-substituted paper

Abstract

The utility model discloses high-toughness durable plastic paper, which belongs to the technical field of packaging paper and comprises a functional layer, an outer base paper layer, a fiber mesh layer, an inner base paper layer and a barrier layer which are sequentially arranged along the thickness direction, the functional layer completely covers the upper surface of the outer base paper layer, the outer base paper layer completely covers the upper surface of the fiber mesh layer, and the barrier layer is arranged on the outer base paper layer. The fiber net layer is formed by weaving a plurality of fiber silk threads in a staggered mode, the outer surface of the fiber net layer is wrapped with a heat-sealing coating, the inner base paper layer partially covers the lower surface of the fiber net layer, and a heat-sealing belt is formed at the position, not covered by the inner base paper layer, of the lower surface of the fiber net layer and located at the position close to the edge of the fiber net layer. The barrier layer completely covers the lower surface of the inner base paper layer; the plastic substitute paper has good toughness, tear resistance, stretch resistance and the like, has higher durability, can be used as an outer package of various products and provides higher-strength protection for the packaged products.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging paper, in particular to a durable plastic-substitute paper with high toughness. 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 eroded 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. In addition, the physical properties of wood pulp paper, such as toughness, are also poor, making it difficult to use packaging paper for products with high protection requirements and difficult to maintain the original protection strength for a long time. Therefore, most packaging paper is used for products with low protection requirements or only short-term protection. It is still difficult to replace plastic packaging on a large scale and be used for products with high protection requirements or long-term protection.

[0003] A Chinese patent with publication number CN215164174U discloses a heat-sealable waterproof and oil-proof food packaging paper that uses paper instead of plastic, including a paper body, one side of the paper body is coated with a waterproof and oil-proof layer, and the other side is coated with a heat-seal coating; the packaging paper has good waterproof and oil-proof properties due to the waterproof and oil-proof layer, and the packaging edge is sealed by heating and bonding the heat-seal coating, but the mechanical strength of the paper body is low, and it is easy to break under the influence of external forces, friction and other factors. It is difficult to apply to products with high protection requirements and it is difficult to maintain the original protection strength for a long time, 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 high-toughness durable plastic substitute paper, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0005] A durable plastic-substitute paper with high toughness comprises a functional layer, an outer base paper layer, a fiber mesh layer, an inner base paper layer and a barrier layer which are arranged in sequence along the thickness direction, wherein the functional layer completely covers the upper surface of the outer base paper layer, the outer base paper layer completely covers the upper surface of the fiber mesh layer, the fiber mesh layer is formed by interlacing and weaving a plurality of fiber threads, and the outer surface of the fiber mesh layer is wrapped with a heat-sealing coating; the inner base paper layer partially covers the lower surface of the fiber mesh layer, a heat-sealing belt is formed at a position of the lower surface of the fiber mesh layer not covered by the inner base paper layer, and the heat-sealing belt is located near the edge of the fiber mesh layer; the barrier layer completely covers the lower surface of the inner base paper layer.

[0006] As a further technical solution of the utility model, the upper surface of the outer base paper layer is discontinuously or completely covered with printing ink to form a printing surface, and the printing surface is located between the outer base paper layer and the functional layer.

[0007] As a further technical solution of the utility model, the functional layer is formed by coating a functional additive having one or more functions of waterproofing, anti-oxidation, wear resistance and high temperature resistance on the surface of the outer base paper layer and then curing it.

[0008] As a further technical solution of the utility model, the outer base paper layer is made of wood pulp paper with a grammage of 20-100gsm, and the inner base paper layer is made of wood pulp paper with a grammage of 10-20gsm.

[0009] As a further technical solution of the utility model, the heat-sealing coating is formed by coating a heat-sealing material on the outer surface of the fiber web layer and then curing it.

[0010] As a further technical solution of the utility model, the lower surface of the outer base paper layer is provided with a plurality of grooves matching the fiber mesh layer, and the top of the fiber mesh layer is embedded in the grooves.

[0011] As a further technical solution of the utility model, a fiber cavity is formed between at least three adjacent fiber threads, and a bonding point for bonding the outer base paper layer and the inner base paper layer to each other is provided in the fiber cavity, and a plurality of through holes penetrate the inner base paper layer relative to the fiber cavity.

[0012] As a further technical solution of the utility model, the barrier layer is formed by coating a barrier material on the lower surface of the inner base paper layer and then curing it.

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

[0014] The plastic-free paper of the utility model can be used for the outer packaging of various products. A functional layer and a barrier layer are respectively provided on both sides of the plastic-free paper, both of which can prevent the invasion of external components such as water and oil. The functional layer also has anti-oxidation and wear-resistant properties, which improves the protective performance of the surface of the plastic-free paper and makes the plastic-free paper more durable. The main base material of the plastic-free paper composed of an outer base paper layer, a fiber mesh layer, and an inner base paper layer has good toughness, tear resistance, tensile resistance and other properties, which further improves the durability of the plastic-free paper and provides higher strength protection for the packaged products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of a high-toughness durable plastic-substitute paper.

[0016] Figure 2 It is a structural schematic diagram of another implementation scheme of a high-toughness durable plastic-substitute paper.

[0017] Figure 3This is a disassembly diagram of a high-toughness and durable plastic substitute paper.

[0018] Among them: functional layer 1, outer base paper layer 2, printing surface 21, groove 22, bonding point 23, fiber mesh layer 3, fiber thread 31, heat sealing coating 32, heat sealing tape 33, fiber cavity 34, inner base paper layer 4, through hole 41, barrier layer 5. 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 1-3 As shown, a high-toughness durable plastic-substitute paper comprises a functional layer 1, an outer base paper layer 2, a fiber mesh layer 3, an inner base paper layer 4, and a barrier layer 5 which are arranged in sequence along the thickness direction. The functional layer 1 completely covers the upper surface of the outer base paper layer 2, and the outer base paper layer 2 completely covers the upper surface of the fiber mesh layer 3. The fiber mesh layer 3 is woven by a plurality of fiber threads 31, and the outer surface of the fiber mesh layer 3 is wrapped with a heat-sealing coating 32; the inner base paper layer 4 partially covers the lower surface of the fiber mesh layer 3, and a heat-sealing belt 33 is formed at the position of the lower surface of the fiber mesh layer 3 not covered by the inner base paper layer 4, and the heat-sealing belt 33 is located near the edge of the fiber mesh layer 3; the barrier layer 5 completely covers the lower surface of the inner base paper layer 4.

[0021] The plastic substitute paper of the utility model is used to replace plastic as the outer packaging of various products. The plastic substitute paper is composited by a multi-layer structure, and includes a functional layer 1, an outer base paper layer 2, a fiber mesh layer 3, an inner base paper layer 4, and a barrier layer 5 in the thickness direction. The side close to the functional layer 1 is usually used as the outer side of the outer packaging of the plastic substitute paper. The functional layer 1 is formed by coating a functional auxiliary agent having one or more functions of waterproof, anti-oxidation, wear resistance, and high temperature resistance on the surface of the outer base paper layer 2 and then curing. The functional auxiliary agent is preferably a mixture of waterproof agents, antioxidants, wear resistance agents, and high temperature resistance agents commonly used for paper on the market, so that the functional layer 1 has the functions of waterproof, anti-oxidation, The functional layer 1 is used as the outer side of the plastic paper outer packaging, which can improve the protective performance of the plastic paper outer packaging, thereby better protecting the products wrapped inside; the side close to the barrier layer 5 is usually used as the inner side of the plastic paper outer packaging, and the barrier layer 5 is formed by coating a barrier material on the lower surface of the inner base paper layer 4 and then curing it. The barrier material is selected from one of starch-based barrier materials, cellulose-based barrier materials, and chitosan-based barrier materials. The barrier layer 5 can block water, oil and other components from the outside or in the product that are easy to invade the interior of the plastic paper, avoid the reduction of strength after these components invade the interior of the plastic paper, and improve the durability of the plastic paper.

[0022] The outer base paper layer 2, the fiber mesh layer 3, and the inner base paper layer 4 of the utility model are used together as the main substrate of the plastic substitute paper. The three are bonded by the heat-sealing coating 32 on the surface of the fiber mesh layer 3 to form a main substrate of a three-layer composite structure. The heat-sealing coating 32 is formed by coating a heat-sealing material on the outer surface of the fiber mesh layer 3 and then curing it. The heat-sealing material is selected from one of a starch-based heat-sealing material and a cellulose-based heat-sealing material. Both of these heat-sealing materials have the advantages of being environmentally friendly, degradable, and renewable. The heat-sealing coating 32 is melted by heating to bond the outer base paper layer 2 and the inner base paper layer 4 to the two sides of the fiber mesh layer 3 respectively. After the heat-sealing coating 32 is cooled and cured, a three-layer composite structure is formed. The heat-sealing coating 32 After curing, it has good mechanical properties and shows good stability and durability when subjected to external forces such as pressure and stretching; in the fiber mesh layer 3, the fiber threads 31 are filamentary materials made by twisting one or more of cellulose fibers, regenerated cellulose fibers, polylactic acid fibers, and seaweed fibers. The fiber threads 31 have the advantages of high toughness, environmental protection, degradability, and renewability. After the fiber threads 31 are woven into a fiber mesh layer 3 with a mesh structure, the fiber mesh layer 3 shows good tear resistance, tensile resistance and other properties, which makes the main substrate of the plastic-free paper have higher toughness and more durability. The outer packaging of the plastic-free paper can provide higher strength and lasting protection for the product.

[0023] After adopting the above structure, it should be noted that the inner base paper layer 4 partially covers the lower surface of the fiber mesh layer 3, so that the lower surface of the fiber mesh layer 3 is exposed on the lower surface of the plastic-substitute paper to form a heat-sealing belt 33. Since the surface of the fiber mesh layer 3 is coated with a heat-sealing coating 32, the plastic-substitute paper can be bonded to other parts of itself or other plastic-substitute papers through the heat-sealing belt 33 to wrap the product to form an outer package. According to the shape of the package made of plastic-substitute paper as needed, the heat-sealing belt 33 is set at a suitable position, so that various outer packages of various specifications and shapes can be formed.

[0024] The plastic-free paper of the utility model can be used for the outer packaging of various products. A functional layer 1 and a barrier layer 5 are respectively provided on both sides of the plastic-free paper, both of which can prevent the invasion of external components such as water and oil. The functional layer 1 also has anti-oxidation and wear-resistant properties, which improves the protective performance of the surface of the plastic-free paper and makes the plastic-free paper more durable. The main base material of the plastic-free paper composed of an outer base paper layer 2, a fiber mesh layer 3, and an inner base paper layer 4 has good toughness, tear resistance, tensile resistance and other properties, which provides higher strength protection for the packaged products and further improves the durability of the plastic-free paper.

[0025] like Figure 1 , 2 As shown, as one of the preferred embodiments of the utility model, the upper surface of the outer base paper layer 2 is discontinuously or completely covered with printing ink to form a printing surface 21, and the printing surface 21 is located between the outer base paper layer 2 and the functional layer 1.

[0026] The plastic-substitute paper of the utility model is used to replace plastic as the outer packaging of various products. It is usually necessary to print product information, decorative patterns and other contents on the surface of the outer packaging. Therefore, printing is usually performed on the upper surface of the outer base paper layer 2. During the printing process, the printing ink is solidified on the upper surface of the outer base paper layer 2 to form a printing surface 21, and the functional layer 1 after the functional additive is solidified is transparent, which will not affect the external presentation of the printing surface 21; when the printing ink intermittently covers the upper surface of the outer base paper layer 2, it is usually used to print small patterns and product information and other contents. When the printing ink completely covers the upper surface of the outer base paper layer 2, it is usually used to change the color of the surface of the plastic-substitute paper and print product information, decorative patterns and other contents, and the ink is completely printed on the upper surface of the outer base paper layer 2. It needs to be selected according to needs.

[0027] As one of the preferred embodiments of the utility model, the outer base paper layer 2 is made of wood pulp paper with a grammage of 20-100 gsm, and the inner base paper layer 4 is made of wood pulp paper with a grammage of 10-20 gsm.

[0028] The outer base paper layer 2 of the utility model is a structure close to the outside of the plastic-substitute paper outer packaging, so wood pulp paper with a higher gram weight is used to ensure the strength of the surface of the plastic-substitute paper outer packaging. The plastic-substitute paper outer packaging can withstand higher-intensity external forces and provide better protection for the packaged products. The inner base paper layer 4 is mainly used to cooperate with the outer base paper layer 2 to fix the fiber mesh layer 3 inside the plastic-substitute paper. Therefore, wood pulp paper with a lower gram weight can be used, so that the inner base paper layer 4 has good softness and can better wrap the fiber mesh layer 3 from the lower surface.

[0029] like Figure 2 , 3 As shown, as one of the preferred embodiments of the utility model, the lower surface of the outer base paper layer 2 is provided with a plurality of grooves 22 matching the fiber mesh layer 3 , and the top of the fiber mesh layer 3 is embedded in the groove 22 .

[0030] The utility model forms a groove 22 matching the fiber mesh layer 3 on the lower surface of the outer base paper layer 2 through embossing and other processes. The groove 22 can embed the fiber mesh layer 3 into the outer base paper layer 2, so that the outer base paper layer 2 and the fiber mesh layer 3 can be more firmly fixed to each other, so that the interior of the plastic-forming paper has higher uniformity, and the plastic-forming paper can avoid delamination and other phenomena.

[0031] like Figure 1 , 3 As shown, as one of the preferred embodiments of the utility model, a fiber cavity 34 is formed between at least three adjacent fiber threads 31, and a bonding point 23 for bonding the outer base paper layer 2 and the inner base paper layer 4 to each other is provided in the fiber cavity 34, and a plurality of through holes 41 are penetrated at the position of the inner base paper layer 4 relative to the fiber cavity 34.

[0032] The fiber web layer 3 of the utility model is a mesh structure. After the outer base paper layer 2, the fiber web layer 3, and the inner base paper layer 4 are compounded, the outer base paper layer 2 and the inner base paper layer 4 are not adhered to each other at the position of the fiber cavity 34, and the relative position of the fiber cavity 34 is easily pierced under the action of external force. The normal operation is to first hot-press and bond the outer base paper layer 2 and the fiber web layer 3 into a double-layer structure, and then apply a plant-based adhesive in a dotted manner in each fiber cavity 34 on the lower surface of the outer base paper layer 2 in the double-layer structure to form a bonding point 23, and then bond the inner base paper layer 4 to the double-layer structure through the plant-based adhesive. The through holes 41 on the surface of the inner base paper layer 4 help to discharge the air in the fiber cavity 34 during the bonding process, and then bond the inner base paper layer 4 to the fiber web layer 3 by hot pressing to form a main substrate with a three-layer structure.

[0033] Furthermore, the fiber mesh layer 3 is formed by interlacing and weaving a number of fiber threads 31. Depending on the weaving method, the fiber cavity 34 can be rectangular, rhombus, triangular or other shapes. The rectangular and rhombus-shaped fiber cavities 34 make the fiber mesh layer 3 have a certain tensile elasticity, and the plastic-free paper also has a certain tensile elasticity and has better softness. The triangular fiber cavity 34 makes the fiber mesh layer 3 not easy to deform under the action of external force, so that the plastic-free paper has better toughness and better protection performance, and the structure of the fiber mesh layer 3 can be adjusted according to the characteristics of the packaging required by the product.

[0034] 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 high-toughness durable plastic-replacement paper, characterized in that: The invention comprises a functional layer (1), an outer base paper layer (2), a fiber web layer (3), an inner base paper layer (4), and a barrier layer (5) which are arranged in sequence along the thickness direction, wherein the functional layer (1) completely covers the upper surface of the outer base paper layer (2), the outer base paper layer (2) completely covers the upper surface of the fiber web layer (3), the fiber web layer (3) is formed by interlacing and weaving a plurality of fiber threads (31), and the outer surface of the fiber web layer (3) is coated with a heat-sealing coating (32); the inner base paper layer (4) partially covers the lower surface of the fiber web layer (3), a heat-sealing belt (33) is formed at a position of the lower surface of the fiber web layer (3) not covered by the inner base paper layer (4), and the heat-sealing belt (33) is located near the edge of the fiber web layer (3); and the barrier layer (5) completely covers the lower surface of the inner base paper layer (4).

2. The high-toughness durable plastic-substitute paper according to claim 1, characterized in that: The upper surface of the outer base paper layer (2) is intermittently or completely covered with printing ink to form a printing surface (21), and the printing surface (21) is located between the outer base paper layer (2) and the functional layer (1).

3. The high-toughness durable plastic-substitute paper according to claim 1, characterized in that: The functional layer (1) is formed by coating a functional auxiliary agent having one or more functions of waterproofing, anti-oxidation, wear resistance, and high temperature resistance on the upper surface of the outer base paper layer (2) and then curing the coating.

4. The high-toughness durable plastic-substitute paper according to claim 1, characterized in that: The outer base paper layer (2) is made of wood pulp paper with a grammage of 20-100 gsm, and the inner base paper layer (4) is made of wood pulp paper with a grammage of 10-20 gsm.

5. The high-toughness durable plastic-substitute paper according to claim 1, characterized in that: The heat-sealing coating (32) is formed by coating a heat-sealing material on the outer surface of the fiber web layer (3) and then curing the coating.

6. The high-toughness durable plastic-substitute paper according to claim 1, characterized in that: The lower surface of the outer base paper layer (2) is provided with a plurality of grooves (22) matching the fiber mesh layer (3), and the top of the fiber mesh layer (3) is embedded in the grooves (22).

7. The high-toughness durable plastic-substitute paper according to claim 1, characterized in that: A fiber cavity (34) is formed between at least three adjacent fiber threads (31), and a bonding point (23) for bonding the outer base paper layer (2) and the inner base paper layer (4) to each other is provided in the fiber cavity (34), and a plurality of through holes (41) are penetrated through the inner base paper layer (4) at a position relative to the fiber cavity (34).

8. The high-toughness durable plastic-substitute paper according to claim 1, characterized in that: The barrier layer (5) is formed by coating a barrier material on the lower surface of the inner base paper layer (4) and then curing the coating.

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