CN220129724U - Waterproof leather and bag - Google Patents
Waterproof leather and bag Download PDFInfo
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- CN220129724U CN220129724U CN202321439376.3U CN202321439376U CN220129724U CN 220129724 U CN220129724 U CN 220129724U CN 202321439376 U CN202321439376 U CN 202321439376U CN 220129724 U CN220129724 U CN 220129724U
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- 239000010985 leather Substances 0.000 title claims abstract description 84
- 239000010410 layer Substances 0.000 claims abstract description 102
- 239000002344 surface layer Substances 0.000 claims abstract description 25
- 239000004744 fabric Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims abstract description 11
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 4
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- 239000002245 particle Substances 0.000 claims description 22
- 238000001035 drying Methods 0.000 claims description 19
- 229920000728 polyester Polymers 0.000 claims description 19
- 239000004745 nonwoven fabric Substances 0.000 claims description 15
- 229920000742 Cotton Polymers 0.000 claims description 10
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 7
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- 241001330002 Bambuseae Species 0.000 claims description 7
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 12
- 239000002131 composite material Substances 0.000 abstract description 7
- 239000002649 leather substitute Substances 0.000 abstract description 7
- 238000009423 ventilation Methods 0.000 abstract description 4
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
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- 229910052731 fluorine Inorganic materials 0.000 description 2
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- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
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- Laminated Bodies (AREA)
Abstract
The utility model discloses a waterproof leather and a bag, wherein the waterproof leather is artificial leather, and comprises a waterproof breathable surface layer, an imitation leather layer, a bottom sealing base cloth layer and a waterproof breathable bottom layer which are sequentially arranged from top to bottom; the waterproof breathable surface layer and the waterproof breathable bottom layer are thermoplastic polyurethane films. Unlike traditional leather waterproof treatment process (tanning and finishing), the technical scheme does not need to adopt chrome tanning agent or chrome-containing material for tanning to realize water resistance, and does not need to adopt leather waterproof agent with high cost for finishing. According to the technical scheme, the thermoplastic polyurethane film is selected as the waterproof breathable material, and the waterproof breathable material is simply subjected to composite molding to form a composite layer structure. The thermoplastic polyurethane film effectively solves the difficult problem that both waterproof and ventilation are not available, and has the advantages of soft hand feeling, soft luster and the like on the surface of the product, and meanwhile, the production cost is greatly reduced.
Description
Technical Field
The utility model relates to the technical field of wrapping leather, in particular to waterproof leather and a wrapping bag.
Background
The leather product is made of protein as matrix and has strong hydrophilicity and air permeability, and the leather processed and prepared by people can be added with a plurality of raw materials containing hydrophilic groups such as hydroxyl, carboxyl, amino, amido and the like in the preparation process, so that the leather has poor waterproof performance and the use of the leather is seriously influenced. For this reason, the water-repellent properties of leather have been a focus of research in the art.
The leather waterproof technology at the present stage mainly comprises the following two steps:
(1) The tanning waterproof technology comprises the following steps: the method is characterized in that the method is based on chrome tanned blue wet leather, the chrome tanned blue wet leather is endowed with waterproofness through a waterproof material in the subsequent wet dyeing and finishing, and the chrome tannage or the chrome-containing material is adopted for fixation.
The tanning waterproof technology is adopted, and the addition of the waterproof material brings negative effects on the physical and mechanical properties and the organoleptic properties of the leather, so that the problem is not solved well. Meanwhile, the chrome tanning agent is used for tanning, and the ecological environmental pressure of leather enterprises is increased due to the chromium-containing wastewater, sludge, waste leather scraps and the like generated after tanning.
(2) The waterproof coating process comprises the following steps: the leather waterproof agent is coated on the surface of leather to form a uniform waterproof agent coating film.
The waterproof finishing agent mainly comprises siloxane polymers or fluorine-containing acrylic polymers. The organic synthetic waterproof coating agent of high molecular polymer containing silicon or fluorine has the advantages of complex synthetic process and high cost even though the waterproof performance of leather products can be obviously improved. The high cost makes the organosilicon waterproofing agent not well popularized and applied, on the other hand, a large amount of organic solvent is needed in the actual preparation process of the organosilicon waterproofing agent, which is not consistent with the development direction of the low-toxicity and low-pollution coating advocated at present, and the organosilicon waterproofing agent becomes a non-negligible disadvantage in the future development and application.
Therefore, the traditional waterproof leather has various defects in the technology and the coating structure, and a novel waterproof leather needs to be provided.
Disclosure of Invention
In order to overcome the technical defects, the utility model provides waterproof leather and a bag.
In order to solve the problems, the utility model is realized according to the following technical scheme:
in a first aspect, the waterproof leather comprises a waterproof breathable surface layer, a simulated leather layer, a bottom sealing base cloth layer and a waterproof breathable bottom layer which are sequentially arranged from top to bottom;
wherein, the waterproof breathable surface layer and the waterproof breathable bottom layer are thermoplastic polyurethane films.
With reference to the first aspect, the utility model further provides a 1 st preferred embodiment of the first aspect, specifically, the back cover base fabric layer includes a tightly laminated inner layer and a quick-drying surface layer, the inner layer is attached to the simulated skin layer, and the quick-drying surface layer is attached to the waterproof breathable bottom layer.
With reference to the first aspect, the utility model also provides a 2 nd preferred embodiment of the first aspect, specifically, the quick-drying surface layer is formed by knitting ultra-fine denier polyester yarns and polypropylene staple fiber pure yarns.
With reference to the first aspect, the utility model also provides a 3 rd preferred embodiment of the first aspect, specifically, the inner layer is formed by weaving bamboo/polyester fiber blended yarn and pure cotton yarn.
With reference to the first aspect, the utility model also provides a 4 th preferred embodiment of the first aspect, specifically, the simulated leather layer is composed of an upper layer of particles and a lower layer of non-woven fabric, the upper layer of particles is attached to the waterproof breathable surface layer, and the lower layer of non-woven fabric is attached to the back cover base fabric layer.
With reference to the first aspect, the utility model also provides a 5 th preferred embodiment of the first aspect, specifically, the lower nonwoven fabric is formed by interweaving collagen fibers and polyester superfine fibers through a needle punching method.
With reference to the first aspect, the present utility model also provides a 6 th preferred embodiment of the first aspect, specifically, the thickness of the lower particle layer is 0.3-0.6 mm, the lower particle layer is formed by thermal transfer printing polyurethane resin particles on the PET film, and the particle size of the polyurethane resin particles is 10-20 μm.
In a second aspect, the present utility model also provides a bag, wherein the bag body of the bag is made of the waterproof leather in the first aspect.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides waterproof leather, which belongs to artificial leather, and comprises a waterproof breathable surface layer, an imitation leather layer, a bottom sealing base cloth layer and a waterproof breathable bottom layer which are sequentially arranged from top to bottom; the waterproof breathable surface layer and the waterproof breathable bottom layer are thermoplastic polyurethane films.
According to the waterproof leather, the waterproof breathable surface layer and the waterproof breathable bottom layer are compounded on the upper surface and the lower surface of the waterproof leather, and the upper layer and the lower layer are provided with double waterproof layers, so that the material has good air permeability and can achieve a waterproof function.
Unlike traditional leather waterproof treatment process (tanning and finishing), the technical scheme does not need to adopt chrome tanning agent or chrome-containing material for tanning to realize water resistance, and does not need to adopt leather waterproof agent with high cost for finishing. According to the technical scheme, the thermoplastic polyurethane film is selected as the waterproof breathable material, and the waterproof breathable material is simply subjected to composite molding to form a composite layer structure. The thermoplastic polyurethane film effectively solves the difficult problem that both waterproof and ventilation are not available, and has the advantages of soft hand feeling, soft luster and the like on the surface of the product, and meanwhile, the production cost is greatly reduced.
The tanned leather is not required to be subjected to waterproof modification treatment by using a fatting agent and a waterproof agent, and the waterproof agent is not required to be coated. The waterproof performance of the artificial leather is endowed, the economic value and the application scene of the leather are increased, and the waterproof performance of the artificial leather has good popularization and application prospects.
Drawings
The utility model is described in further detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic view of the layer structure of the waterproof leather of the present utility model;
FIG. 2 is a schematic diagram of the structure of the pack of the present utility model;
in the figure:
10-a waterproof breathable surface layer;
20-simulated leather layers, 21-upper granular layers and 22-lower non-woven fabrics;
30-a back cover base cloth layer, 31-an inner layer and 32-a quick-drying surface layer;
40-a waterproof breathable bottom layer;
50-bag body.
Detailed Description
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
As shown in fig. 1, a preferred structure of the waterproof leather according to the present utility model.
As shown in fig. 1, the waterproof leather comprises a waterproof breathable surface layer 10, a simulated leather layer 20, a back cover base cloth layer 30 and a waterproof breathable bottom layer 40 which are sequentially arranged from top to bottom; the waterproof breathable surface layer 10 and the waterproof breathable bottom layer 40 are both thermoplastic polyurethane films.
The main innovation of the technology of the utility model is that: unlike traditional leather waterproof treatment process (tanning and finishing), the technical scheme does not need to adopt chrome tanning agent or chrome-containing material for tanning to realize water resistance, and does not need to adopt leather waterproof agent with high cost for finishing. According to the technical scheme, the thermoplastic polyurethane film is selected as the waterproof breathable material, and the waterproof breathable material is simply subjected to composite molding to form a composite layer structure. The thermoplastic polyurethane film effectively solves the difficult problem that both waterproof and ventilation are not available, and has the advantages of soft hand feeling, soft luster and the like on the surface of the product, and meanwhile, the production cost is greatly reduced.
The leather after tanning is not required to be subjected to waterproof modification treatment by using a fatting agent and a waterproof agent, and the waterproof agent is not required to be coated. The waterproof performance of the artificial leather is endowed, the economic value and the application scene of the leather are increased, and the waterproof performance of the artificial leather has good popularization and application prospects.
In the technology, the waterproof leather is substantially artificial leather, and the technology adopts green and environment-friendly raw materials to prepare non-woven fabrics, and finally the leather-like fabric is prepared.
Specifically, the emulation cortex comprises upper granule layer and lower floor's non-woven fabric, upper granule layer and waterproof ventilative surface course laminating, lower floor's non-woven fabric and back cover base cloth layer laminating. Wherein, the lower non-woven fabric is formed by interweaving collagen fibers and polyester superfine fibers through a needle punching method. The thickness of the lower particle layer is 0.3-0.6 mm, the lower particle layer is formed by thermally transferring polyurethane resin particles on the PET film, and the particle size of the polyurethane resin particles is 10-20 mu m.
The simulated leather layer 20 is a non-woven fabric formed by interweaving collagen fibers and polyester superfine fibers through a needle punching method. The collagen fiber and the terylene superfine fiber are selected, and the fiber mesh base material is formed by adopting needling mechanical processing, so that the environment-friendly and the mesh non-woven structure has better air permeability. And by compounding the polyester superfine fibers, the ageing resistance, tensile strength, tear strength, elongation, flexibility and other performances of the simulated leather layer are improved, and the problems of low strength and low tear resistance of the collagen fiber non-woven fabric are solved. Is more beneficial to the popularization of the textile processing of the waste leather collagen fiber.
In one implementation, the length of the polyester superfine fiber is not less than 20mm.
On the other hand, the present utility model combines an upper granular layer 21 on the upper surface of the lower nonwoven fabric 22 of the simulated skin layer 20. The polyurethane resin particles have excellent chemical resistance and high and low temperature resistance, have better adhesive force to substrates which are difficult to bond, use the resin particles, have better compatibility, and the particles of small particles can be inserted into the gaps of the net structure in the simulation leather layer, thereby avoiding increasing the thickness of leather and improving the composite strength of products.
The technology of the utility model simulates the composition and structure of leather by a simulated leather layer consisting of an upper granular layer and a lower non-woven fabric formed by polyurethane granules. The product is similar to natural leather, and has bright appearance, soft texture, wear resistance, folding resistance, acid and alkali resistance and the like. And the particle layer is added to enable the leather surface to have three-dimensional sense, and the leather touch sense, the glossiness and the simulation effect are good.
In another preferred innovation of the present utility model, the present utility model innovates a back cover base layer. Wherein, the back cover base cloth layer includes closely laminated inlayer 31 and quick-drying top layer 32, the inlayer with emulation cortex laminating, quick-drying top layer with waterproof ventilative bottom laminating. Specifically, the quick-drying surface layer is formed by weaving superfine denier polyester yarns and polypropylene staple fiber pure yarns. The inner layer is formed by weaving bamboo/polyester fiber blended yarn and pure cotton yarn.
In the waterproof leather of this patent, waterproof ventilative surface course and waterproof ventilative bottom have waterproof function and gas permeability good, play waterproof ventilative effect. Because the water can enter the leather when the waterproof and breathable film is carelessly damaged in the use process of a user. Therefore, the inner layer and the quick-drying surface layer of the back cover base cloth layer have the main effects of moisture removal and quick drying, and prevent moisture from gathering in the leather.
Specifically, the inner layer is formed by weaving bamboo/polyester fiber blended yarns and pure cotton yarns, the inner layer is used as a fabric attached to the simulated leather layer, the material selection mainly considers the gradient effect of the reinforced double-layer structure, the good moisture dispersion effect is realized, and the moisture of the simulated fabric layer is absorbed and dispersed; on the other hand, the inner layer needs to keep instant moisture conduction and dryness continuously.
Specifically, the pure cotton yarn is adopted, and because a large number of hydrophilic groups are arranged on the cotton fiber macromolecules, the hydrophilic property is good, the moisture absorption is good, the gradient difference of the hydrophilic and hydrophobic properties of the material of the inner layer and the quick-drying outer layer is enlarged, and the unidirectional moisture guiding effect is enhanced. The bamboo/polyester fiber blended yarn is combined, the moisture absorption and moisture conduction capacity of the needle lining fabric is improved, the excellent performances of natural antibacterial, moisture absorption and ventilation, smoothness, softness, warmth and the like of the bamboo fiber are maintained, the defects of poor dyeing property, easiness in pilling, easiness in static electricity generation, poor meltability resistance and the like of the polyester fiber are overcome, and the two fibers are brought into play to the most important point. The bamboo/polyester fiber blended yarn and the pure cotton yarn are used as the inner layer, so that the leather has good antibacterial property and excellent moisture absorption and air permeability, and mold breeding after the interior of the imitation leather is wetted is prevented.
The quick-drying surface layer is formed by weaving superfine denier polyester yarns and polypropylene staple fiber pure yarns. The quick-drying outdoor is mainly used for realizing the effects of quick-drying, moisture removal and unidirectional moisture transfer. In the evaporation and dehumidification process, the inner layer is responsible for rapidly conducting moisture to the quick-drying outer layer through the simulation leather layer, the quick-drying outer layer needs to volatilize the exported moisture as soon as possible, meanwhile, the exported moisture is ensured not to reenter the inner layer, the unidirectional moisture guiding effect is realized, and the moisture can be discharged to the external environment through the waterproof breathable fabric.
Specifically, the pure cotton yarn and the cotton fiber macromolecule have a large number of hydrophilic groups, so that the pure cotton yarn has good hydrophilicity and good hygroscopicity, is beneficial to expanding the gradient difference of the hydrophilic and hydrophobic properties of the inner and outer materials, and enhances the unidirectional moisture guiding effect. The moisture permeability of the superfine denier polyester increases along with the decrease of the fiber linear density, and the moisture dissipation is faster. The inner layer is woven by adopting the ultra-fine denier polyester yarns and the polypropylene staple fiber pure yarns, and the inner layer fabric manufactured by the polypropylene staple fiber pure yarns has better moisture absorption quick-drying performance and air permeability, is ideal in cooperation with the hand feeling and skin affinity of the ultra-fine denier fibers, and improves the comfort of the inner layer.
The waterproof leather is characterized in that the upper surface and the lower surface of the waterproof leather are compounded with the waterproof breathable surface layer and the waterproof breathable bottom layer, and the upper layer and the lower layer are provided with double waterproof layers, so that the material has good air permeability and can achieve a waterproof function. Meanwhile, the waterproof leather is combined with the back cover base inside the waterproof leather, so that the moisture inside the leather is quickly discharged and dried. The waterproof performance of the leather is comprehensively improved, and the problem that the use of the leather is influenced due to the waterproof performance is solved.
As shown in fig. 2, the present utility model also provides a bag, and the bag body 50 of the bag is made of the waterproof leather.
The waterproof leather and other structures of the bag according to the embodiment are described in the prior art.
The present utility model is not limited to the preferred embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present utility model are within the scope of the technical proposal of the present utility model.
Claims (8)
1. The waterproof leather is characterized by comprising a waterproof breathable surface layer, a simulated leather layer, a bottom sealing base cloth layer and a waterproof breathable bottom layer which are sequentially arranged from top to bottom;
wherein, the waterproof breathable surface layer and the waterproof breathable bottom layer are thermoplastic polyurethane films.
2. A waterproof leather according to claim 1, characterized in that:
the back cover base cloth layer comprises a lining layer and a quick-drying surface layer which are tightly laminated, wherein the lining layer is attached to the simulation skin layer, and the quick-drying surface layer is attached to the waterproof breathable bottom layer.
3. A waterproof leather according to claim 2, characterized in that:
the quick-drying surface layer is formed by weaving superfine denier polyester yarns and polypropylene staple fiber pure yarns.
4. A waterproof leather according to claim 3, characterized in that:
the inner layer is formed by weaving bamboo/polyester fiber blended yarn and pure cotton yarn.
5. A waterproof leather according to claim 1, characterized in that:
the simulated leather layer is composed of an upper granular layer and a lower non-woven fabric, the upper granular layer is attached to the waterproof breathable surface layer, and the lower non-woven fabric is attached to the back cover base fabric layer.
6. A waterproof leather according to claim 5, characterized in that:
the lower nonwoven fabric is formed by interweaving collagen fibers and polyester superfine fibers through a needle punching method.
7. A waterproof leather according to claim 5, characterized in that:
the thickness of the upper layer particle layer is 0.3-0.6 mm, the upper layer particle layer is formed by thermally transferring polyurethane resin particles on the PET film, and the particle size of the polyurethane resin particles is 10-20 mu m.
8. A bag characterized in that the body of the bag is made of a waterproof leather according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321439376.3U CN220129724U (en) | 2023-06-07 | 2023-06-07 | Waterproof leather and bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321439376.3U CN220129724U (en) | 2023-06-07 | 2023-06-07 | Waterproof leather and bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220129724U true CN220129724U (en) | 2023-12-05 |
Family
ID=88963094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321439376.3U Active CN220129724U (en) | 2023-06-07 | 2023-06-07 | Waterproof leather and bag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220129724U (en) |
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2023
- 2023-06-07 CN CN202321439376.3U patent/CN220129724U/en active Active
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