High tear resistance composite ecological paper

Abstract

The utility model discloses a kind of high tear-resistance composite ecological paper, belong to ecological paper technical field, including upper paper layer, tear-resistant layer, lower paper layer, the upper paper layer, tear-resistant layer, lower paper layer are sequentially arranged along thickness direction, the upper surface of the tear-resistant layer is equipped with several upper reinforcing ribs, lower surface is equipped with several lower reinforcing ribs, the lower surface of the upper paper layer is equipped with the upper groove matched with upper reinforcing rib, the upper surface of the lower paper layer is equipped with the lower groove matched with lower reinforcing rib;The tear-resistant layer inside is equipped with several toughening parts, and several The toughening parts are longitudinally and transversely distributed in the tear-resistant layer inside;The utility model makes the composite ecological paper show stronger toughness under the action of external force stretching by tear-resistant layer, to avoid composite ecological paper being torn.

Description

Technical Field

[0001] This utility model relates to the field of eco-paper technology, specifically to a high tear-resistant composite eco-paper. Background Technology

[0002] Currently, the outer packaging of most hygiene products, medical supplies, food, and other products is made of plastic materials. These plastic materials are usually not easily degradable and are not environmentally friendly. On the other hand, paper materials such as wood pulp paper and kraft paper, as products made from natural raw materials, are completely degradable, making them a more ideal packaging material. However, paper materials have insufficient strength as packaging materials, which makes them prone to damage during use. Therefore, it is usually necessary to combine paper materials with other materials to make multi-layer composite paper with higher strength to avoid damage during use.

[0003] Based on the above, Chinese patent document CN219523294U discloses a high-temperature resistant tear-resistant coated paper, comprising a paper body, a base layer in the middle of the paper body, and a base material; an outer layer of the base layer is configured as a first tear-resistant layer, and an inner layer of the base layer is configured as a second tear-resistant layer; the first tear-resistant layer and the second tear-resistant layer are woven by crosswise transverse glass fibers and longitudinal glass fibers, thereby improving the tensile strength of the paper body and playing a tear-resistant role; the outer layer of the base layer is configured as the first tear-resistant layer, and the inner layer of the base layer is configured as the second tear-resistant layer, both of which are woven by crosswise transverse glass fibers and longitudinal glass fibers. The aforementioned patent document discloses a coated paper with improved tear resistance using glass fiber. This coated paper achieves strong tear resistance through a first tear-resistant layer and a second tear-resistant layer on both sides of the base paper material. Both the first and second tear-resistant layers are woven from glass fiber. However, glass fiber has high hardness and is quite brittle. Furthermore, the first and second tear-resistant layers usually need to be fixed to the surface of the base paper material with adhesive. When the coated paper is rolled or folded, phenomena such as the glass fiber separating from the base paper material, the glass fiber piercing the base paper material, or the glass fiber breaking may occur. Therefore, although glass fiber improves the tear resistance of the coated paper, bending or folding should be avoided during use, which increases the limitations of the coated paper. Utility Model Content

[0004] To address the technical deficiencies in the background art, this utility model proposes a high tear-resistant composite eco-paper, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows: A high tear-resistant composite eco-paper includes an upper paper layer, a tear-resistant layer, and a lower paper layer, wherein the upper paper layer, the tear-resistant layer, and the lower paper layer are arranged sequentially along the thickness direction. The upper surface of the tear-resistant layer is provided with a plurality of upper reinforcing ribs and the lower surface is provided with a plurality of lower reinforcing ribs. The lower surface of the upper paper layer is provided with an upper groove that matches the upper reinforcing ribs, and the upper surface of the lower paper layer is provided with a lower groove that matches the lower reinforcing ribs. The tear-resistant layer has several toughening portions inside, which are distributed in a crisscross pattern inside the tear-resistant layer.

[0005] As a further technical solution of this utility model, a number of the upper reinforcing ribs extend in a mesh pattern on the upper surface of the tear-resistant layer, and the two ends of each upper reinforcing rib extend to the edge of the tear-resistant layer. The lower reinforcing ribs extend in a mesh pattern on the lower surface of the tear-resistant layer, with each lower reinforcing rib extending to the edge of the tear-resistant layer at both ends.

[0006] As a further technical solution of this utility model, the inner sides of the upper groove and the lower groove are provided with anchoring holes, the anchoring holes penetrate both sides of the upper paper layer or the lower paper layer, and the surfaces of the upper reinforcing rib and the lower reinforcing rib are provided with anchoring protrusions extending into the anchoring holes.

[0007] As a further technical solution of this utility model, the lower surface of the upper paper layer and the upper surface of the lower paper layer are both formed with rough surfaces. The rough surfaces make the lower surface of the upper paper layer uneven outside the upper groove, and the rough surfaces make the upper surface of the lower paper layer uneven outside the lower groove.

[0008] As a further technical solution of this utility model, the thickness ratio of the upper paper layer to the lower paper layer is 1:1, and the thickness ratio of the upper paper layer to the tear-resistant layer is (1-5):1.

[0009] The beneficial effects of this utility model are as follows: This utility model discloses a composite eco-paper with high tear resistance. The composite eco-paper consists of an upper paper layer, a tear-resistant layer, and a lower paper layer along its thickness direction. The surfaces of the upper and lower paper layers are respectively embossed to form upper and lower grooves, which can increase the contact area between the upper and lower paper layers and the tear-resistant layer, and improve the bonding strength between the tear-resistant layer and the upper and lower paper layers. At the same time, the surface of the tear-resistant layer forms upper and lower reinforcing ribs and has strong tear resistance. The tear-resistant layer makes the composite eco-paper exhibit stronger toughness under external tensile force, thereby preventing the composite eco-paper from being torn. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of a high tear-resistant composite eco-paper.

[0011] Figure 2 A breakdown diagram of a high tear-resistant composite eco-paper. Figure 1 .

[0012] Figure 3 A breakdown diagram of a high tear-resistant composite eco-paper. Figure 2 .

[0013] Wherein: 1-upper paper layer, 11-upper groove, 2-tear-resistant layer, 21-upper reinforcing rib, 22-lower reinforcing rib, 3-lower paper layer, 31-lower groove, 4-anchoring hole, 5-rough surface. Detailed Implementation

[0014] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0015] A high tear-resistant composite eco-paper includes an upper paper layer 1, a tear-resistant layer 2, and a lower paper layer 3. The upper paper layer 1, the tear-resistant layer 2, and the lower paper layer 3 are arranged sequentially along the thickness direction. The upper surface of the tear-resistant layer 2 is provided with a plurality of upper reinforcing ribs 21, and the lower surface is provided with a plurality of lower reinforcing ribs 22. The lower surface of the upper paper layer 1 is provided with an upper groove 11 that matches the upper reinforcing ribs 21, and the upper surface of the lower paper layer 3 is provided with a lower groove 31 that matches the lower reinforcing ribs 22. The tear-resistant layer 2 has several toughening parts inside, which are distributed in a crisscross pattern inside the tear-resistant layer 2.

[0016] This utility model discloses a composite eco-paper with high tear resistance, referring to... Figure 1 , Figure 2 , Figure 3 The composite eco-paper consists of an upper paper layer 1, a tear-resistant layer 2, and a lower paper layer 3 along its thickness direction. Both the upper paper layer 1 and the lower paper layer 3 are made of wood pulp paper, kraft paper, and other paper materials. These paper materials are composed of fully biodegradable biomass fibers to ensure the environmental friendliness of the composite eco-paper. The tear-resistant layer 2 mainly uses low-polymerization polyvinyl alcohol or other materials with good film-forming properties and biodegradability. A polyvinyl alcohol film is formed by coating a polyvinyl alcohol solution between the upper paper layer 1 and the lower paper layer 3 and drying it. The polyvinyl alcohol film has the characteristics of being strong, tough, and tensile. The polyvinyl alcohol film serves as the substrate of the tear-resistant layer 2 and is located between the upper paper layer 1 and the lower paper layer 3. It enables the composite eco-paper to exhibit stronger toughness under external tensile force, thereby preventing the composite eco-paper from being torn. In the process of making composite ecological paper, firstly, upper groove 11 and lower groove 31 are formed on the surfaces of upper paper layer 1 and lower paper layer 3 by embossing. Then, polyvinyl alcohol is dissolved in an appropriate amount of hot water to form a polyvinyl alcohol solution with a certain viscosity. The polyvinyl alcohol solution is coated on the side of upper paper layer 1 with upper groove 11 and lower paper layer 3 with lower groove 31. Then, the surfaces of upper paper layer 1 and lower paper layer 3 coated with polyvinyl alcohol solution are joined together to form a multi-layer structure. The multi-layer structure is dried, and the polyvinyl alcohol solution is dried between upper paper layer 1 and lower paper layer 3 to form a polyvinyl alcohol film. At the same time, upper paper layer 1 and lower paper layer 3 are bonded and fixed to each other to obtain the composite ecological paper of this utility model. In the composite ecological paper, the thickness ratio of upper paper layer 1 to lower paper layer 3 is 1:1, and the thickness ratio of upper paper layer 1 to tear-resistant layer 2 is (1-5):1. It should be noted that after the polyvinyl alcohol solution is coated on the surfaces of the upper paper layer 1 and the lower paper layer 3, the upper groove 11 and the lower groove 31 can each hold more polyvinyl alcohol solution. When the polyvinyl alcohol solution is dried into a film, thicker upper reinforcing ribs 21 and lower reinforcing ribs 22 will be formed in the upper groove 11 and the lower groove 31, respectively. The upper reinforcing ribs 21 and lower reinforcing ribs 22 can improve the toughness of the tear-resistant layer 2 and increase the contact area between the upper paper layer 1, the lower paper layer 3 and the tear-resistant layer 2, thereby increasing the bonding strength between the tear-resistant layer 2 and the upper paper layer 1 and the lower paper layer 3 and preventing the internal structural layers of the composite ecological paper from detaching from each other. Furthermore, the toughening part can be made from biodegradable synthetic resins such as polybutylene succinate, polycaprolactone, polybutylene terephthalate-adipate, and polylactic acid, or from flexible natural plant fibers such as flax fiber and hemp fiber. After the polyvinyl alcohol solution is coated on the surface of the upper paper layer 1 and the lower paper layer 3, the fibrous toughening part is evenly spread on the surface of the polyvinyl alcohol coating, so that the toughening part is attached to the surface of the upper paper layer 1 and the lower paper layer 3 through the polyvinyl alcohol coating. After the upper paper layer 1 and the lower paper layer 3 are fixed together to form a composite ecological paper through the polyvinyl alcohol coating, the toughening part is wrapped inside the tear-resistant layer 2. The toughening part can improve the flexibility of the tear-resistant layer 2, so that the tear-resistant layer 2 can better resist external tearing, thereby improving the tear resistance of the composite ecological paper.

[0017] As one of the preferred embodiments of this utility model, refer to Figure 1 , Figure 2 , Figure 3Several upper reinforcing ribs 21 extend in a mesh-like pattern on the upper surface of the tear-resistant layer 2, with each upper reinforcing rib 21 extending to the edge of the tear-resistant layer 2 at both opposite ends; lower reinforcing ribs 22 extend in a mesh-like pattern on the lower surface of the tear-resistant layer 2, with each lower reinforcing rib 22 extending to the edge of the tear-resistant layer 2 at both opposite ends; during the production of composite eco-paper, when the upper paper layer 1 and the lower paper layer 3 are surface-embossed, they can be rolled by an embossing roller with a mesh-like raised texture, thereby making the upper paper layer 1 and the lower paper layer 3 more textured. A mesh-like upper groove 11 is formed on the surface of layer 1, and a mesh-like lower groove 31 is formed on the surface of the lower paper layer 3. After the polyvinyl alcohol solution is coated between the upper paper layer 1 and the lower paper layer 3 and cured into a film to form the tear-resistant layer 2, an upper reinforcing rib 21 matching the upper groove 11 is formed on the upper surface of the tear-resistant layer 2, and a lower reinforcing rib 22 matching the lower groove 31 is formed on the lower surface of the tear-resistant layer 2. The upper reinforcing ribs 21 and the lower reinforcing ribs 22 are interwoven, thereby improving the toughness of the tear-resistant layer 2 in multiple directions. Furthermore, both the upper groove 11 and the lower groove 31 are provided with anchoring holes 4 on their inner sides. The anchoring holes 4 penetrate both sides of the upper paper layer 1 or the lower paper layer 3. The surfaces of the upper reinforcing rib 21 and the lower reinforcing rib 22 are provided with anchoring protrusions extending into the anchoring holes 4. When the upper paper layer 1 and the lower paper layer 3 are subjected to surface embossing, the mesh-like embossing on the surface of the embossing roller can be provided with several needle-like protrusions. At the same time as embossing, several through anchoring holes 4 are formed on the surfaces of the upper paper layer 1 and the lower paper layer 3. During the coating process of polyvinyl alcohol solution, the polyvinyl alcohol solution is absorbed into the interior by the capillary action of the anchoring holes 4 and after it is cured into a film, it can form anchoring protrusions inside the anchoring holes 4. The anchoring protrusions can serve as anchoring structures to improve the mutual fixation between the tear-resistant layer 2 and the upper paper layer 1 or the lower paper layer 3, improve the mutual bonding and fixation strength between the internal structural layers of the composite ecological paper, and prevent the internal structural layers of the composite ecological paper from detaching from each other.

[0018] As one of the preferred embodiments of this utility model, refer to Figure 1 , Figure 2 , Figure 3 Both the lower surface of the upper paper layer 1 and the upper surface of the lower paper layer 3 are formed with rough surfaces 5. The rough surfaces 5 make the lower surface of the upper paper layer 1 uneven outside the upper groove 11, and the rough surfaces 5 make the upper surface of the lower paper layer 3 uneven outside the lower groove 31. The side of the upper paper layer 1 and the lower paper layer 3 that needs to be coated with polyvinyl alcohol solution can be sanded to form rough surfaces 5. After the uneven rough surfaces 5 are formed by sanding, the polyvinyl alcohol solution can better adhere to the surface of the rough surfaces 5, thereby improving the bonding strength between the tear-resistant layer 2 and the upper paper layer 1 or the lower paper layer 3.

[0019] In summary, this utility model discloses a composite eco-paper with high tear resistance. The composite eco-paper is composed of an upper paper layer 1, a tear-resistant layer 2, and a lower paper layer 3 along its thickness direction. The surfaces of the upper paper layer 1 and the lower paper layer 3 are respectively embossed to form upper grooves 11 and lower grooves 31, which can increase the contact area between the upper paper layer 1, the lower paper layer 3 and the tear-resistant layer 2, and improve the bonding strength between the tear-resistant layer 2 and the upper paper layer 1 and the lower paper layer 3. At the same time, the surface of the tear-resistant layer 2 forms upper reinforcing ribs 21 and lower reinforcing ribs 22 and has strong tear resistance. The tear-resistant layer 2 makes the composite eco-paper exhibit stronger toughness under external tensile force, thereby preventing the composite eco-paper from being torn.

[0020] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high tear-resistant composite eco-paper, comprising an upper paper layer (1), a tear-resistant layer (2), and a lower paper layer (3), characterized in that, The upper paper layer (1), the tear-resistant layer (2), and the lower paper layer (3) are arranged sequentially along the thickness direction. The upper surface of the tear-resistant layer (2) is provided with a plurality of upper reinforcing ribs (21), and the lower surface is provided with a plurality of lower reinforcing ribs (22). The lower surface of the upper paper layer (1) is provided with an upper groove (11) that matches the upper reinforcing ribs (21), and the upper surface of the lower paper layer (3) is provided with a lower groove (31) that matches the lower reinforcing ribs (22). The tear-resistant layer (2) has a number of toughening parts inside, and the toughening parts are distributed in a crisscross pattern inside the tear-resistant layer (2).

2. The high tear-resistant composite eco-paper according to claim 1, characterized in that, Several of the upper reinforcing ribs (21) extend in a mesh pattern on the upper surface of the tear-resistant layer (2), and the two ends of each upper reinforcing rib (21) extend to the edge of the tear-resistant layer (2); The lower reinforcing ribs (22) extend in a mesh pattern on the lower surface of the tear-resistant layer (2), with each lower reinforcing rib (22) extending to the edge of the tear-resistant layer (2) at both ends.

3. The high tear-resistant composite eco-paper according to claim 1, characterized in that, Anchoring holes (4) are provided on the inner sides of the upper groove (11) and the lower groove (31). The anchoring holes (4) penetrate both sides of the upper paper layer (1) or the lower paper layer (3). Anchoring protrusions extending into the anchoring holes (4) are provided on the surfaces of the upper reinforcing rib (21) and the lower reinforcing rib (22).

4. The high tear-resistant composite eco-paper according to claim 1, characterized in that, The lower surface of the upper paper layer (1) and the upper surface of the lower paper layer (3) are both formed with rough surfaces (5). The rough surfaces (5) make the lower surface of the upper paper layer (1) uneven outside the upper groove (11), and the rough surfaces (5) make the upper surface of the lower paper layer (3) uneven outside the lower groove (31).

5. The high tear-resistant composite eco-paper according to claim 1, characterized in that, The thickness ratio of the upper paper layer (1) to the lower paper layer (3) is 1:1, and the thickness ratio of the upper paper layer (1) to the tear-resistant layer (2) is (1-5):1.

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