A splash-proof and cut-resistant leather bag fabric composite structure

Abstract

The utility model relates to a leather bag material technical field, concretely relates to a leather bag fabric composite structure of preventing splashing and cutting, the utility model provides a leather bag fabric composite structure of preventing splashing and cutting, including from outside to inside sequentially layering arrangement and composite as an organic whole's outer skin layer, prevent splashing function layer, high strength fiber prevent cutting layer and comfortable lining, wherein outer skin layer is made of natural leather or artificial leather, prevent splashing function layer coats or is attached to the inner surface of outer skin layer, high strength fiber prevent cutting layer is by super high molecular weight polyethylene fiber or aramid fiber woven cloth or non -woven fabric constitutes, and comfortable lining, in addition, prevent splashing function layer with high strength fiber prevent cutting layer between through first hot melt adhesive film adhesion, high strength fiber prevent cutting layer with comfortable lining between through second hot melt adhesive film adhesion.

Description

Technical Field

[0001] This utility model relates to the field of leather bag material technology, specifically to a composite structure of leather bag fabric that is water-repellent and cut-resistant. Background Technology

[0002] The material used in making handbags is the core functional carrier, typically forming the outer protective structure and internal contact layer. Its performance directly determines the bag's durability, aesthetics, and user experience. Common handbag materials include natural leather (such as top-grain cowhide and split leather) and artificial leather (such as high-performance synthetic leather). The former is made from animal hides through tanning, dyeing, and other processes, possessing a natural texture and high strength; the latter uses synthetic polymer materials to simulate leather texture, focusing on cost control and ease of care. Both types of materials must possess basic wear resistance, stain resistance, and a comfortable feel to meet the needs of frequent friction, contact with stains, and handling in daily use.

[0003] Existing leather bag fabrics have significant shortcomings in practical applications: First, traditional fabrics only enhance a single function (such as water repellency or cut resistance), making it difficult to simultaneously address the needs of multiple scenarios, including rain penetration and cuts from sharp objects. Second, while some composite fabrics attempt multi-layered bonding, they often use ordinary water-based or solvent-based adhesives, which can lead to interlayer delamination due to temperature changes and humidity fluctuations after long-term use, causing fabric failure. Third, improper selection of fiber type and weight in the cut-resistant layer can result in contradictions such as "good cut resistance but poor softness" or "soft but easily cut," and insufficient material durability of the water-repellent layer can also lead to rapid degradation of waterproof performance. These problems fail to meet consumers' comprehensive needs for high-quality leather bags that are "multifunctional, long-lasting, and highly comfortable." Utility Model Content

[0004] The purpose of this invention is to provide a composite structure for leather bag fabric that is water-repellent and cut-resistant. Through multi-layer functional synergy and optimized parameter design, it solves the problems of single protection, interlayer peeling, and performance imbalance of existing leather bag fabrics.

[0005] The technical solution provided by this utility model is a composite structure for a water-repellent and cut-resistant leather bag fabric, comprising layers stacked sequentially from the outside to the inside and integrally formed as one piece:

[0006] The outer skin layer is made of natural or artificial leather;

[0007] A water-repellent functional layer is coated or adhered to the inner surface of the outer skin layer;

[0008] The high-strength fiber anti-cut layer is composed of woven or non-woven fabric made of ultra-high molecular weight polyethylene fiber or aramid fiber;

[0009] And a comfortable inner lining;

[0010] The water-repellent functional layer and the high-strength fiber cut-resistant layer are bonded together by a first hot melt adhesive film, and the high-strength fiber cut-resistant layer and the comfort lining layer are bonded together by a second hot melt adhesive film.

[0011] As a preferred technical solution of this utility model, the water-repellent functional layer is one of the following: a coating of a three-proof finishing agent containing fluorocarbon compounds, a thermoplastic polyurethane (TPU) film, or an expanded polytetrafluoroethylene (e-PTFE) film.

[0012] As a preferred technical solution of this utility model, the high-strength fiber anti-cut layer is a non-woven fabric, woven fabric or knitted fabric made of ultra-high molecular weight polyethylene fiber.

[0013] As a preferred embodiment of this invention, the basis weight of the high-strength fiber anti-cut layer is 30 g / m². 2 -150g / m 2 .

[0014] As a preferred embodiment of the present invention, the first hot melt adhesive film and the second hot melt adhesive film are polyurethane (PUR) hot melt adhesive films or copolyamide (Co-PA) hot melt adhesive films.

[0015] As a preferred technical solution of this utility model, the comfortable inner lining layer is one of textile fabric, microfiber artificial leather or microporous polyurethane foam layer.

[0016] As a preferred technical solution of this utility model, the outer skin layer is top-grain cowhide, split cowhide, or high-performance synthetic leather that has undergone hydrophobic treatment.

[0017] As a preferred embodiment of this utility model, the total thickness of the composite structure is 0.8 mm to 2.5 mm.

[0018] The advantages of this utility model compared with the prior art are as follows:

[0019] 1. Multifunctional Synergy: Through a four-layer structure of "outer skin - water-repellent - cut-resistant - comfortable inner lining", it simultaneously achieves three core performances: water repellency (blocking liquid penetration), cut resistance (fibers disperse cutting force), and comfort (soft touch), meeting the needs of multiple usage scenarios;

[0020] 2. Strong interlayer adhesion: PUR or Co-PA hot melt adhesive film is used instead of ordinary glue. The adhesive layer formed after hot pressing and curing is resistant to aging and peeling, effectively extending the service life of the fabric.

[0021] 3. Performance parameter optimization: 30g / m² of high-strength fiber anti-cut layer 2 -150g / m 2The weight range ensures sufficient cut resistance while avoiding a decrease in softness due to excessive thickness;

[0022] 4. High adaptability: Each layer of material offers multiple options (such as a coating or film for the water-repellent layer, and fabric or foam for the lining), and the cost and performance can be adjusted according to the positioning of the bag (high-end / mass market). The total thickness of 0.8-2.5mm meets the conventional design requirements of leather bags. Attached Figure Description

[0023] Figure 1 This is a structural diagram of a water-repellent and cut-resistant composite structure for a leather bag.

[0024] Figure 2 This is a cross-sectional view of a water-repellent and cut-resistant composite structure for a leather bag fabric according to this utility model.

[0025] Figure 3 This is an enlarged cross-sectional view at point A of the composite structure of a water-repellent and cut-resistant leather bag fabric according to this utility model.

[0026] As shown in the figure:

[0027] 1. Outer skin layer; 2. Water-repellent functional layer; 3. High-strength fiber cut-resistant layer; 4. Comfortable inner lining layer; 5. First hot melt adhesive film; 6. Second hot melt adhesive film. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Example 1:

[0031] As per the instruction manual Figure 1-3As shown, a water-repellent and cut-resistant leather bag composite structure includes an outer skin layer 1, a water-repellent functional layer 2, a high-strength fiber cut-resistant layer 3, and a comfortable inner lining layer 4, which are stacked and composited from the outside to the inside.

[0032] In this embodiment, the outer skin layer 1 is made of top-grain cowhide that has undergone hydrophobic treatment, with a thickness of 0.6 mm. The surface retains the natural leather texture, and the hydrophobic treatment enhances its stain resistance.

[0033] In this embodiment, the water-repellent functional layer 2 is coated with a three-proof finishing agent containing fluorocarbon compounds, with a thickness of 0.05mm. It is attached to the inner side of the outer skin layer 1 by a padding process to achieve long-lasting water repellency.

[0034] In this embodiment, the high-strength fiber anti-cut layer 3 is made of ultra-high molecular weight polyethylene fiber nonwoven fabric with a basis weight of 50g / m². 2 The thickness is 0.1mm, and it is bonded to the water-repellent functional layer 2 through the first hot melt adhesive film 5 (PUR hot melt adhesive film, thickness 0.02mm);

[0035] In this embodiment, the comfort lining layer 4 is made of microfiber artificial leather with a thickness of 0.45mm, and is bonded to the cut-resistant layer by a second hot melt adhesive film 6 (Co-PA hot melt adhesive film with a thickness of 0.02mm).

[0036] In this embodiment, the total thickness is 0.6 + 0.05 + 0.1 + 0.45 = 1.2 mm, which meets the requirements for a thin and light leather bag.

[0037] Example 2:

[0038] This embodiment describes a water-repellent and cut-resistant leather bag fabric composite structure, which includes an outer skin layer 1, a water-repellent functional layer 2, a high-strength fiber cut-resistant layer 3, and a comfortable inner lining layer 4, which are stacked and composited from the outside to the inside.

[0039] In this embodiment, the outer skin layer 1 is made of high-performance synthetic leather with a thickness of 0.5mm, which simulates the texture of top-grain cowhide and has better wear resistance than natural leather.

[0040] In this embodiment, the water-repellent functional layer 2 is made of expanded polytetrafluoroethylene (e-PTFE) film with a thickness of 0.03mm. It is attached by hot pressing composite, which makes the water-repellent durability stronger.

[0041] In this embodiment, the high-strength fiber anti-cut layer 3 is made of aramid fiber woven fabric with a basis weight of 100g / m². 2 It has a thickness of 0.2mm and is bonded by the first hot melt adhesive film 5 (PUR hot melt adhesive film);

[0042] In this embodiment, the comfort lining layer 4 is a microporous polyurethane foam layer with a thickness of 0.3 mm, which is bonded by the second hot melt adhesive film 6 (Co-PA hot melt adhesive film).

[0043] In this embodiment, the total thickness is 0.5 + 0.03 + 0.2 + 0.3 = 1.03 mm. The aramid fiber further enhances the resistance to sharp objects, making it suitable for outdoor scenarios such as hiking backpacks.

[0044] In the above embodiments, each layer is laminated by a hot-pressing process, and the hot melt adhesive film is cured at 120°C and 0.5MPa pressure to ensure that the interlayer bonding strength is ≥5N / cm (far exceeding the 1-2N / cm of ordinary adhesives).

[0045] Working principle

[0046] The core of this utility model is the synergistic effect of multiple functions:

[0047] 1. The outer skin layer 1 serves as the first barrier, directly contacting the external environment. The hydrophobic material reduces stain adhesion, and the abrasion-resistant properties of natural / synthetic leather slow down surface wear.

[0048] 2. The water-repellent functional layer 2 uses the low surface energy of fluorocarbon compounds (microporous structure of e-PTFE) to block water penetration. When rainwater or sweat comes into contact with it, water droplets will form and roll off, preventing it from penetrating into the inner layer.

[0049] 3. High-strength fiber anti-cut layer 3 utilizes the high modulus characteristics of ultra-high molecular weight polyethylene fiber (tensile strength up to 30cN / dtex) or aramid fiber (tensile strength up to 28cN / dtex) to disperse external cutting force. Even if it is scratched by a sharp object, the fiber will not break easily, thus avoiding the formation of holes.

[0050] 4. Comfort Lining Layer 4 enhances comfort when in contact with items inside the bag or the human body through the breathability of textile fabrics, the softness of microfiber synthetic leather, or the elasticity of microporous foam.

[0051] 5. The hot melt adhesive film serves as an interlayer bonding carrier. The continuous adhesive layer formed after hot pressing fixes each layer into a whole, preventing interlayer peeling caused by friction and stretching during use.

[0052] The present invention and its embodiments have been described above. This description is not restrictive, and the specific embodiments shown are only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A composite structure for a leather bag fabric that is water-repellent and cut-resistant, characterized in that, This includes elements that are layered and combined from the outside in: The outer skin layer (1) is made of natural leather or artificial leather; A water-repellent functional layer (2) is coated or adhered to the inner surface of the outer skin layer (1); The high-strength fiber anti-cut layer (3) is composed of woven or non-woven fabric made of ultra-high molecular weight polyethylene fiber or aramid fiber; And a comfort lining layer (4); The water-repellent functional layer (2) and the high-strength fiber cut-resistant layer (3) are bonded together by a first hot melt adhesive film (5), and the high-strength fiber cut-resistant layer (3) and the comfortable inner lining layer (4) are bonded together by a second hot melt adhesive film (6).

2. The water-repellent and cut-resistant composite structure of a leather bag fabric according to claim 1, characterized in that: The water-repellent functional layer (2) is one of the following: a coating of a three-proof finishing agent containing fluorocarbon compounds, a thermoplastic polyurethane (TPU) film, or an expanded polytetrafluoroethylene (e-PTFE) film.

3. The water-repellent and cut-resistant composite structure of a leather bag fabric according to claim 1, characterized in that: The high-strength fiber anti-cut layer (3) is a non-woven fabric, woven fabric or knitted fabric made of ultra-high molecular weight polyethylene fiber.

4. The water-repellent and cut-resistant composite structure of a leather bag fabric according to claim 3, characterized in that: The weight of the high-strength fiber cut-resistant layer (3) is 30 g / m². 2 -150g / m 2 .

5. The water-repellent and cut-resistant composite structure of a leather bag fabric according to claim 1, characterized in that: The first hot melt adhesive film (5) and the second hot melt adhesive film (6) are polyurethane (PUR) hot melt adhesive films or copolyamide (Co-PA) hot melt adhesive films.

6. The water-repellent and cut-resistant composite structure of a leather bag fabric according to claim 1, characterized in that: The comfort lining layer (4) is one of textile fabric, microfiber artificial leather or microporous polyurethane foam.

7. The water-repellent and cut-resistant composite structure of a leather bag fabric according to claim 1, characterized in that: The outer skin layer (1) is top-grain cowhide, split cowhide, or high-performance synthetic leather that has undergone hydrophobic treatment.

8. The water-repellent and cut-resistant composite structure of a leather bag fabric according to claim 1, characterized in that: The total thickness of the composite structure is 0.8 mm to 2.5 mm.

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