Waterproof bag

Abstract

The utility model discloses a waterproof bag which comprises a bag main body, and a front part, a bag bottom and a rear part of the bag main body are formed by bending integral waterproof leather; the waterproof leather comprises a polyurethane wear-resistant layer, a waterproof simulation leather layer, a bottom sealing base cloth layer and a waterproof breathable layer which are sequentially arranged from outside to inside. The outer surface of the bag is a place easy to contact with the outside and is also a part easy to wear, so that the outer surface of the waterproof leather is coated with the polyurethane wear-resistant layer, the surface of the waterproof leather is effectively protected, the wear process of the whole outer surface of the bag is effectively prevented or slowed down, and the service life of the bag is prolonged. Waterproof failure caused by abrasion of the waterproof simulation leather layer is avoided, the waterproof performance of the waterproof leather is prolonged, and the service life of the bag is comprehensively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of bags, and specifically designs a waterproof bag. Background Art

[0002] Leather bags are highly respected among many materials, and their high quality is widely welcomed. Today's consumers have high expectations for leather bags, not only in terms of quality, but also in terms of functionality and environmental protection. The waterproof performance of bags has always been a hot topic in this field.

[0003] At present, the leather waterproofing process of bags mainly includes the following two types: (1) tanning waterproofing process and (2) waterproof coating process. Tanning waterproofing process, due to the addition of waterproof materials, has a negative effect on the physical and mechanical properties and sensory properties of leather, and this problem has not been well solved. At the same time, chrome tanning agents are used for tanning, and the chromium-containing wastewater, sludge, waste leather scraps, etc. produced after tanning have increased the ecological and environmental pressure of leather enterprises. Waterproof coating agents are mainly composed of siloxane polymers or fluorine-containing acrylate polymers. Among them, organic synthetic silicon-containing or fluorine-containing polymer waterproof coating agents can significantly improve the waterproofness of leather products, but their synthesis process is complicated and costly. The high cost has prevented them from being widely used. On the other hand, silicone waterproofing agents require a large amount of organic solvents in the actual preparation process, which is inconsistent with the current development direction of low-toxicity and low-pollution coatings, and will become a disadvantage that cannot be ignored in future development and application.

[0004] Traditional waterproof leather has many defects in process and coating structure. For this reason, a Chinese utility model patent with announcement number CN220129724U discloses a waterproof leather and a bag. The waterproof leather is artificial leather, which includes a waterproof and breathable surface layer, a simulated leather layer, a backing base fabric layer and a waterproof and breathable bottom layer arranged in sequence from top to bottom; the waterproof and breathable surface layer and the waterproof and breathable bottom layer are both thermoplastic polyurethane films.

[0005] However, after the applicant received feedback from the user survey, the bag had the following technical defects: after a period of use, the leather bag will have different degrees of wear at different locations, especially the bottom of the bag is the most worn location. The wear on the leather surface will cause the waterproof and breathable surface layer to be damaged and fail, and moisture will penetrate into the leather from the worn area. Water marks will cause color difference and affect the appearance. On the other hand, the moisture inside the leather is not easy to evaporate, which may cause mold to grow. Utility Model Content

[0006] In order to overcome the above technical defects, the utility model provides a waterproof bag.

[0007] In order to solve the above problems, the utility model is implemented according to the following technical solutions:

[0008] The waterproof bag of the utility model comprises a bag body, wherein the front panel, the bottom panel and the back panel of the bag body are formed by bending an integral waterproof leather;

[0009] The waterproof leather comprises a polyurethane wear-resistant layer, a waterproof simulated leather layer, a backing base fabric layer and a waterproof breathable layer which are arranged in sequence from the outside to the inside.

[0010] Preferably, the polyurethane wear-resistant layer is a transparent polyurethane wear-resistant layer.

[0011] Preferably, the bag body has side panels on the left and right sides, and the side panels are connected between the front panel and the back panel;

[0012] Wherein, the side panels are made of waterproof leather.

[0013] Preferably, a plurality of raised wear-resistant parts are fixedly connected to the bottom of the bag body.

[0014] Preferably, the wear-resistant parts are rivets or protruding columns made of wear-resistant plastic, and the number of the wear-resistant parts is at least 4.

[0015] Preferably, the waterproof simulated leather layer is composed of a particle layer, a non-woven fabric and a polyurethane waterproof film, and the polyurethane waterproof film is bonded to the backing base fabric layer;

[0016] The particle layer has a thickness of 0.3 to 0.6 mm, and is formed by thermally transferring polyurethane resin particles onto a PET film, wherein the particle size of the polyurethane resin particles is 10 to 20 μm;

[0017] The nonwoven fabric is formed by interweaving collagen fibers and polyester ultrafine fibers through a needle punching method.

[0018] Preferably, the back cover base fabric layer is woven from bamboo / polyester fiber blended yarn and polypropylene staple fiber pure yarn.

[0019] Preferably, the front panel and the rear panel of the bag body are respectively connected with handles or handles.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The utility model provides a waterproof bag, comprising a bag body, wherein the front panel, the bag bottom and the back panel of the bag body are formed by bending an integral waterproof leather; the waterproof leather comprises a polyurethane wear-resistant layer, a waterproof simulated leather layer, a bottom base fabric layer and a waterproof breathable layer which are arranged in sequence from the outside to the inside.

[0022] The front panel, the bottom panel and the back panel of the waterproof bag of the utility model are formed by bending an integral waterproof leather. By reducing the sewing parts on the surface, the surface integrity of the waterproof bag is good, and water penetration is reduced. On the other hand, the waterproof leather adopts a combination of a waterproof simulated leather layer and a waterproof breathable layer, and has multiple waterproof properties, so that the material maintains good breathability and can also achieve a waterproof function. The moldy part of the leather is mainly the bottom base fabric layer. By adopting a sandwich waterproof structure for the bottom base fabric layer, mold growth is prevented after the bottom base fabric layer is damp.

[0023] On the other hand, the outer surface of the bag is a place that is easily in contact with the outside and is also a part that is more easily worn. For this reason, the present technology coats a polyurethane wear-resistant layer on the outer surface of the waterproof leather to effectively protect the surface of the waterproof leather, effectively prevent or slow down the wear process of the entire outer surface of the bag, avoid the wear of the waterproof simulated leather layer and cause waterproof failure, extend the waterproof performance of the waterproof leather, and comprehensively improve the service life of the bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 It is a three-dimensional schematic diagram of the waterproof bag of the utility model;

[0026] Figure 2 It is a bottom schematic diagram of the waterproof bag of the utility model;

[0027] Figure 3 It is a schematic diagram of the layer structure of the waterproof leather of the utility model;

[0028] In the figure:

[0029] 10- front panel;

[0030] 20- rear width;

[0031] 30-bag bottom, 31-wear-resistant parts;

[0032] 40-side panels;

[0033] 101-polyurethane wear-resistant layer, 102-waterproof simulated leather layer, 103-backing base fabric layer, 103-waterproof breathable layer. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0035] like Figure 1 to Figure 3 As shown, a preferred structure of a waterproof bag described in the utility model.

[0036] As shown in FIG. 1 , the waterproof bag of the utility model is a women's leather bag. The bag body of the waterproof bag is composed of a front panel 10, a rear panel 20, a bag bottom 30, two side panels 40 and two handles. The two side panels are located on the left and right sides of the bag body, between the front panel and the rear panel connected by the side panels. The bag body is connected to form a bag body through the front panel, the rear panel, the bag bottom and the two side panels, and the upper part of the bag body is an opening, which is closed by a zipper.

[0037] Specifically, the front and rear panels of the bag body are connected with handles respectively. In another specific implementation, they can be handles, or long shoulder straps, etc.

[0038] The main innovation of this patent is that the front panel, bottom and back panel of the bag body are formed by bending an integral waterproof leather; the waterproof bag of the utility model, its front panel, bottom and back panel are formed by bending an integral waterproof leather, and by reducing the sewing parts on the surface, the surface integrity of the waterproof bag is good, reducing moisture penetration.

[0039] Furthermore, the waterproof leather comprises a polyurethane wear-resistant layer 101, a waterproof simulated leather layer 102, a bottom base fabric layer 103 and a waterproof breathable layer 104 arranged in sequence from the outside to the inside. The waterproof leather adopts a combination of a waterproof simulated leather layer and a waterproof breathable layer, with multiple waterproof properties, so that the material maintains good breathability and can also achieve a waterproof function. The moldy part of the leather is mainly the bottom base fabric layer, and the bottom base fabric layer is prevented from growing mold after being damp by adopting a sandwich waterproof structure.

[0040] On the other hand, the outer surface of the bag is a place that is easily in contact with the outside and is also a part that is more easily worn. For this reason, the present technology coats a polyurethane wear-resistant layer on the outer surface of the waterproof leather to effectively protect the surface of the waterproof leather, effectively prevent or slow down the wear process of the entire outer surface of the bag, avoid the wear of the waterproof simulated leather layer and cause waterproof failure, extend the waterproof performance of the waterproof leather, and comprehensively improve the service life of the bag.

[0041] In a preferred embodiment, the polyurethane wear-resistant layer is a transparent polyurethane wear-resistant layer. The polyurethane wear-resistant coating is transparent, does not affect the beauty of the bag, and has good decorative properties. It can meet the needs of a variety of leather bags.

[0042] In a preferred embodiment, the side panels are made of waterproof leather, so that the entire leather bag has excellent waterproof performance.

[0043] In this technology, the waterproof leather is actually a kind of artificial simulated leather. This technology uses green and environmentally friendly raw materials to make non-woven fabrics, and finally produces imitation leather fabrics.

[0044] Specifically, the waterproof simulated leather layer is composed of a particle layer, a non-woven fabric and a polyurethane waterproof film, wherein the polyurethane waterproof film is bonded to the back cover base fabric layer. The polyurethane wear-resistant layer is arranged on the outer surface of the particle layer.

[0045] It should be noted that the polyurethane wear-resistant layer can be sprayed on the outer surface of the bag bottom leather material by using a polyurethane wear-resistant material, and then the leather material is cut and sewn into the bag bottom. On the other hand, the coating technology also includes lamination, that is, applying a layer of adhesive on the leather material, covering it with a layer of transparent polyurethane wear-resistant film, heating and pressurizing to form a composite fabric; or the film itself is an adhesive material, which bonds the leather materials together; and then the leather material is cut and sewn into the bag bottom.

[0046] It should be noted that the polyurethane material used in the polyurethane wear-resistant layer is prior art and can be purchased from the market for use in fabrics.

[0047] The nonwoven fabric is formed by interweaving collagen fibers and polyester ultrafine fibers by needle punching. The particle layer has a thickness of 0.3-0.6 mm, and is formed by thermally transferring polyurethane resin particles onto a PET film, and the particle size of the polyurethane resin particles is 10-20 μm.

[0048] The waterproof simulated leather layer of the utility model adopts a non-woven fabric made of collagen fiber and polyester superfine fiber interwoven by needle punching. Collagen fiber and polyester superfine fiber are selected and processed by needle punching machinery to form a fiber mesh base material, which is green and environmentally friendly, and the mesh non-woven structure is more breathable. And through the compounding of polyester superfine fiber, the aging resistance, tensile strength, tear strength, elongation, flexibility and other properties of the simulated leather layer are improved, and the problems of low strength and low tear strength of collagen fiber non-woven fabric are solved. It is more conducive to the promotion of textile processing of waste leather collagen fiber.

[0049] In a specific implementation, the length of the polyester ultrafine fiber is not less than 20 mm. The polyurethane waterproof film is a thermoplastic polyurethane waterproof film with a thickness of 0.5 to 1 mm, which can be hot-pressed and laminated by an adhesive.

[0050] On the other hand, the utility model has a composite particle layer on the upper surface of the non-woven fabric of the waterproof simulated leather layer. The polyurethane resin particles have excellent chemical resistance and high and low temperature resistance, and have good adhesion to substrates that are difficult to bond. The use of resin particles has better compatibility, and small particles can be inserted into the gaps of the mesh structure in the simulated leather layer, avoiding increasing the thickness of the leather and also improving the composite strength of the product.

[0051] The technology of the present invention simulates the composition and structure of genuine leather by forming a particle layer formed by polyurethane particles and a waterproof simulated leather layer composed of non-woven fabrics. The product is similar to natural leather, and has a bright appearance, soft texture, wear resistance, folding resistance, acid and alkali resistance, etc. The addition of the particle layer makes the leather surface have a three-dimensional sense, and the leather touch, glossiness and simulation effect are good. The PET film of the particle layer of the waterproof simulated leather layer is combined with the polyurethane waterproof film, so that the overall waterproof performance of the waterproof simulated leather layer is good.

[0052] Even if it is made of waterproof leather, when its integrity is damaged, the waterproof performance will be affected, and water can still penetrate into the inside through the damaged area. The backing base fabric layer is not waterproof. Not only is it not waterproof but it is also easy to absorb water. In this way, the leather material will be damaged from the inside (such as mold growth, material erosion, etc.), shortening the service life of the leather bag.

[0053] To this end, in another preferred innovation of the utility model, the present invention innovates the backing base fabric layer. Among them, the backing base fabric layer is woven with bamboo / polyester fiber blended yarn and polypropylene staple fiber pure spinning yarn. This technology uses bamboo / polyester fiber blended yarn to make the backing base fabric, the purpose is to utilize the natural antibacterial, soft and warm excellent properties of bamboo fiber, the bamboo / polyester fiber blended yarn has an antibacterial effect, avoids the problem of mold growth due to water vapor accumulation inside the waterproof leather, and then erodes the waterproof leather, and prevents the growth of mold inside the waterproof leather after being damp. On the other hand, the use of pure polypropylene staple fiber spinning makes the backing base fabric have better quick-drying performance and breathability, and prevents water vapor accumulation.

[0054] In a preferred embodiment, the waterproof and breathable layer is made of thermoplastic polyurethane film, which effectively solves the problem of being both waterproof and breathable, and gives the product a soft touch and soft gloss, while significantly reducing production costs.

[0055] In a preferred embodiment, the bottom of the bag body is fixedly connected with a plurality of raised wear-resistant parts 31. The wear-resistant parts are rivets or protruding columns made of wear-resistant plastic, and the number of the wear-resistant parts is at least 4. For example, nylon plastic. The applicant has found through research that the lower part of the bag is also a place that is easily in contact with the outside and is also a part that is more easily worn. The present technology effectively prevents or slows down the wear process of the bottom of the bag by setting wear-resistant parts on the lower surface of the bag bottom, effectively prolongs the service life of the bag, and improves product quality.

[0056] For other structures of the waterproof bag described in this embodiment, refer to the prior art.

[0057] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A waterproof bag, comprising a bag body, characterized in that: The front panel, the bottom and the back panel of the bag body are formed by bending an integral waterproof leather; The waterproof leather comprises a polyurethane wear-resistant layer, a waterproof simulated leather layer, a backing base fabric layer and a waterproof breathable layer which are arranged in sequence from the outside to the inside.

2. A waterproof bag according to claim 1, characterized in that: The polyurethane wear-resistant layer is a transparent polyurethane wear-resistant layer.

3. A waterproof bag according to claim 2, characterized in that: The left and right sides of the bag body are provided with side panels, and the side panels are connected between the front panel and the back panel; Wherein, the side panels are made of waterproof leather.

4. A waterproof bag according to claim 1, characterized in that: A plurality of raised wear-resistant parts are fixedly connected to the bag bottom of the bag body.

5. A waterproof bag according to claim 4, characterized in that: The wear-resistant parts are rivets or protruding columns made of wear-resistant plastics, and the number of the wear-resistant parts is at least 4.

6. A waterproof bag according to any one of claims 1 to 5, characterized in that: The waterproof simulated leather layer is composed of a particle layer, a non-woven fabric and a polyurethane waterproof film, and the polyurethane waterproof film is bonded to the back cover base fabric layer; The particle layer has a thickness of 0.3 to 0.6 mm, and is formed by thermally transferring polyurethane resin particles onto a PET film, wherein the particle size of the polyurethane resin particles is 10 to 20 μm; The nonwoven fabric is formed by interweaving collagen fibers and polyester ultrafine fibers through a needle punching method.

7. A waterproof bag according to any one of claims 1 to 5, characterized in that: The back cover base fabric layer is woven from bamboo / polyester fiber blended yarn and polypropylene staple fiber pure yarn.

8. A waterproof bag according to any one of claims 1 to 5, characterized in that: The front and rear panels of the bag body are respectively connected with handles or handles.

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