A multi-layered rust-proof kraft paper

Abstract

The utility model relates to packing material technical field discloses a kind of multilayer rustproof kraft paper, the kraft paper includes the fixed superposition in thickness direction: buffer layer, protection component, barrier layer and protection component, the protection component includes rustproof layer and waterproof layer;The protection component includes first protective layer and second protective layer, the buffer layer is as inner layer, and the protection component is as outer layer.The utility model is by buffering shock attenuation, chemical rust prevention, gas barrier and physical protection and so on Multiple functions Scientifically integrated into one composite structure, effectively solve the technical problem that existing metal wrapping paper protection function is single, cannot provide comprehensive protection, significantly improve the comprehensive protection reliability and comprehensiveness of metal product in warehousing, transportation process.

Description

Technical Field

[0001] This utility model relates to the field of packaging materials technology, and in particular to a multi-layer rust-proof kraft paper. Background Technology

[0002] Metal products, such as automotive parts, precision machinery, and hardware tools, are highly susceptible to environmental influences during their production, storage, and transportation. Oxidation and rusting, caused by the combined effects of moisture and oxygen in the air, are a major cause of reduced value and even render these metal products unusable. Therefore, the industry widely employs rust-proof packaging materials to protect metal products.

[0003] Currently, one of the most widely used rust-preventive packaging methods is vapor phase corrosion inhibitor paper. This type of paper is coated or impregnated with a vapor phase corrosion inhibitor, allowing it to continuously release rust-preventive gases within a confined space, forming a protective film on the metal surface and thus inhibiting corrosion. However, traditional rust-preventive papers are primarily designed for chemical rust prevention, and the physical strength, abrasion resistance, and tear resistance of the paper substrate itself are usually relatively ordinary. Under complex transportation conditions, packaging paper is easily damaged by friction and abrasion, which not only renders the rust-preventive sealed environment ineffective but also fails to provide effective physical protection for the metal product at the damaged area, increasing the risk of physical damage such as scratches and impacts.

[0004] On the other hand, to enhance physical protection, high-strength kraft paper or multi-layered kraft paper bags are sometimes used for packaging. While these materials possess excellent physical protective properties, effectively resisting external impacts and tearing, they do not inherently possess active rust-prevention capabilities. This type of kraft paper has limited ability to block water vapor and oxygen, failing to fundamentally eliminate the conditions that lead to rust. Relying solely on physical wrapping is still insufficient to effectively prevent metal products from oxidizing and rusting in environments with high humidity or large temperature fluctuations. Therefore, existing technologies often face a dilemma: choosing rust prevention results in insufficient physical protection, while choosing physical protection leads to a lack of rust prevention capabilities.

[0005] In summary, existing metal packaging paper generally suffers from a lack of comprehensive protective functions, making it difficult to integrate excellent physical protection with efficient and durable rust prevention and shock absorption. This fails to meet the high requirements of modern industry for comprehensive and reliable protection of metal products during complex circulation processes.

[0006] Therefore, this utility model proposes a multi-layer rust-proof kraft paper to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problem that existing multi-layer rust-proof kraft paper has a single protective function and cannot simultaneously achieve comprehensive protection of physical protection, moisture protection, rust prevention and shock absorption, resulting in insufficient overall protection reliability, this utility model aims to provide a multi-layer rust-proof kraft paper with an improved structure that can effectively solve the above problems.

[0008] This utility model provides a multi-layer rust-proof kraft paper, including a buffer layer, a protective component, a barrier layer, and a protective component.

[0009] The multi-layered rust-proof kraft paper is a layered composite structure that is sequentially integrated along its thickness direction. The protective component is stacked and fixed on one side of the buffer layer, the barrier layer is stacked and fixed on the inner side of the protective component, and the protective component is stacked and fixed on both sides of the protective component, thereby forming a functionally coordinated organic whole.

[0010] Specifically, the internal structure of the protective component consists of a rust-proof layer and a waterproof layer, which together constitute a chemical protection unit; the internal structure of the protective component consists of a first protective layer stacked and fixed on one side of the waterproof layer and a second protective layer stacked and fixed on one side of the rust-proof layer, which together constitute a physical protection unit.

[0011] Preferably, to achieve close-fitting cushioning protection, the cushioning layer, as the layer that directly contacts the packaged metal product, constitutes the innermost layer of the multi-layered rust-proof kraft paper.

[0012] Preferably, in order to effectively resist the intrusion of the external environment, the first protective layer is the outermost layer of the multilayer rust-proof kraft paper, as the layer directly exposed to the external environment.

[0013] Preferably, to achieve good cushioning and shock absorption performance, the cushioning layer is made of elastic fiber paper.

[0014] Preferably, in order to form chemical protection through an economical and efficient process, the waterproof layer in the protective component is specifically a waterproof coating, and the rust-proof layer is specifically a rust-proof coating.

[0015] Preferably, in order to achieve a highly efficient gas barrier effect and eliminate the causes of corrosion at the source, the barrier layer is made of an EVOH composite film.

[0016] Preferably, to provide excellent physical strength and abrasion resistance, both the first protective layer and the second protective layer in the protective assembly are made of high-strength kraft paper.

[0017] Preferably, to ensure a strong bond and structural stability between the functional layers, the layers of the multi-layer rust-proof kraft paper are bonded and fixed together using an adhesive layer. This invention has the following beneficial effects: 1. This utility model solves the problem that existing metal packaging paper has a single function and cannot provide comprehensive protection such as physical protection, moisture protection, rust prevention and shock absorption at the same time by setting up a multi-layer composite structure of buffer layer, protective component, barrier layer and protective component stacked in sequence. It achieves the technical effect of providing comprehensive and reliable protection for packaged metal products and significantly improves the integrity rate of products during storage and transportation.

[0018] 2. This utility model solves the problem that existing rust-proof packaging relies on a single rust-proof mechanism, resulting in unstable rust-proof effect and insufficient reliability in complex environments. By setting a barrier layer to isolate oxygen and water vapor, and coordinating it with a protective component including a waterproof layer and a rust-proof layer, it achieves a dual rust-proof effect that combines physical isolation and chemical inhibition, greatly enhancing the stability and durability of rust-proof performance.

[0019] 3. This utility model solves the problem that existing packaging paper, while providing rust prevention, often neglects to protect products from physical damage caused by collision, squeezing, and friction. It achieves a comprehensive physical protection effect of internal cushioning and external wear resistance, effectively reducing the risk of physical damage such as scratches and deformation to metal products during circulation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a multi-layer rust-proof kraft paper proposed in this utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the structure of a multi-layer rust-proof kraft paper proposed in this utility model.

[0021] Legend: 1. Protective components; 101. First protective layer; 102. Second protective layer; 2. Barrier layer; 3. Protective components; 301. Waterproof layer; 302. Rust-proof layer; 4. Buffer layer. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Example

[0023] Please refer to Figures 1 to 3 This utility model provides a multi-layer rust-proof kraft paper, which aims to solve the problem that existing metal packaging paper has only a single protective function and is difficult to achieve comprehensive protection of physical protection, moisture protection, rust prevention and shock absorption at the same time.

[0024] Reference Figure 1 , Figure 2 and Figure 3 The multi-layer rust-proof kraft paper has a layered composite structure, which includes a buffer layer 4, a protective component 3, a barrier layer 2, and a protective component 1 stacked and fixed along the thickness direction. The stacking and fixing of each layer is achieved by an adhesive layer. Specifically, the buffer layer 4 constitutes the innermost layer of the multi-layer rust-proof kraft paper; the protective component 3 is stacked and fixed on one side of the buffer layer 4, and the protective component 3 includes a rust-proof layer 302 and a waterproof layer 301; the barrier layer 2 is stacked and fixed between the waterproof layer 301 and the rust-proof layer 302 of the protective component 3; the protective component 1 is stacked and fixed on both sides of the protective component 3, and the protective component 1 includes a first protective layer 101 stacked and fixed on one side of the waterproof layer 301 and a second protective layer 102 stacked and fixed on one side of the rust-proof layer 302. The first protective layer 101 constitutes the outermost layer of the multi-layer rust-proof kraft paper.

[0025] This embodiment constructs a multi-layered composite structure with comprehensive protection by combining and arranging specific material layers. The structure of each layer is described in detail below: Reference Figure 2 and Figure 3 The buffer layer 4, as the inner layer that comes into direct contact with the packaged metal product, is made of elastic fiber paper; the rust-proof layer 302 in the protective component 3 is a rust-proof coating, and the waterproof layer 301 is a waterproof coating; the barrier layer 2 is an EVOH composite film, which is stacked and fixed between the waterproof layer 301 and the rust-proof layer 302 to block oxygen and moisture; the first protective layer 101 and the second protective layer 102 in the protective component 1 are both made of high-strength kraft paper, wherein the first protective layer 101 is stacked and fixed on the waterproof layer 301, and the second protective layer 102 is stacked and fixed on the rust-proof layer 302, thereby forming an outer layer structure for resisting external physical damage.

[0026] Based on the above embodiments, the present invention may further include the following preferred technical solutions: In a preferred embodiment, the material of the buffer layer 4 is elastic fiber paper.

[0027] In another preferred embodiment, the waterproof layer 301 in the protective component 3 is a waterproof coating, and the rust-proof layer 302 is a rust-proof coating.

[0028] As another preferred embodiment, the material of the barrier layer 2 is an EVOH composite film.

[0029] In another preferred embodiment, the first protective layer 101 and the second protective layer 102 in the protective component 1 are both made of high-strength kraft paper.

[0030] In another preferred embodiment, the layers of the multilayer rust-proof kraft paper are bonded and fixed together by an adhesive layer.

[0031] The working principle of this multi-layer rust-proof kraft paper is as follows: When the multi-layer rust-proof kraft paper is used to package metal products, the functional layers work together to provide comprehensive protection. The outer protective component 1 provides basic physical protection through its first protective layer 101 and second protective layer 102, both of which are made of high-strength kraft paper. By utilizing the good abrasion resistance and tear resistance of kraft paper, it resists physical damage such as external friction and scratches that the packaging is subjected to during storage and transportation.

[0032] The inner barrier layer 2, made of EVOH composite membrane material, can effectively block the penetration of oxygen and water vapor, cutting off the core cause of metal oxidation and corrosion at the source.

[0033] The protective component 3 located outside the barrier layer 2 provides active chemical protection. The waterproof layer 301 prevents liquid water from directly wetting the product surface through a waterproof coating, while the anti-rust layer 302 inhibits the electrochemical reaction on the metal surface and slows down the oxidation process through an anti-rust coating. The two work together to achieve excellent waterproof and anti-rust effects.

[0034] As the innermost buffer layer 4, which is in direct contact with the metal product, the elastic fiber paper it uses can absorb impact energy and disperse stress through its own elastic deformation when the packaging is subjected to external impact or compression, thus playing a role in buffering and shock absorption for the packaged metal product and effectively avoiding physical damage such as scratches or deformation caused by collision or compression.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A multi-layer rust-proof kraft paper, characterized in that, Includes a buffer layer (4) that is sequentially stacked and fixed along the thickness direction; The protective component (3) is stacked and fixed to one side of the buffer layer (4), and the protective component (3) includes a waterproof layer (301) and a rust-proof layer (302). A barrier layer (2) is stacked and fixed between the waterproof layer (301) and the rust-proof layer (302) of the protective component (3); And, a protective component (1), which is stacked and fixed on both sides of the protective component (3), the protective component (1) including a first protective layer (101) stacked and fixed on one side of the waterproof layer (301) and a second protective layer (102) stacked and fixed on one side of the anti-rust layer (302).

2. The multi-layer rust-proof kraft paper according to claim 1, characterized in that, The buffer layer (4) constitutes the innermost layer of the multilayer rust-proof kraft paper.

3. The multi-layer rust-proof kraft paper according to claim 1, characterized in that, The first protective layer (101) constitutes the outermost layer of the multilayer rust-proof kraft paper.

4. The multi-layer rust-proof kraft paper according to claim 1, characterized in that, The material of the buffer layer (4) is elastic fiber paper.

5. The multi-layer rust-proof kraft paper according to claim 1, characterized in that, The waterproof layer (301) is a waterproof coating, and the rust-proof layer (302) is a rust-proof coating.

6. The multi-layer rust-proof kraft paper according to claim 1, characterized in that, The barrier layer (2) is made of EVOH composite film.

7. The multi-layer rust-proof kraft paper according to claim 1, characterized in that, The first protective layer (101) and the second protective layer (102) are both made of high-strength kraft paper.

8. The multi-layer rust-proof kraft paper according to claim 1, characterized in that, The layers are bonded and fixed together by an adhesive layer.

Images