Waterproof breathable pearl wool
By setting up a polytetrafluoroethylene hydrophobic layer on the upper and lower surfaces of the pearl cotton substrate layer and designing a breathable channel with differentiated pore sizes, the problem of insufficient waterproof and breathable properties of traditional pearl cotton is solved, and the dual functions of waterproof and breathable are realized to adapt to more demanding Use environment.
Patent Information
- Application Number
- CN202421117392.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-22
AI Technical Summary
Traditional pearl cotton has weak performance in terms of waterproofing and breathability, which is easy to absorb moisture in a humid environment and lead to structural damage. The closed-cell structure limits its breathability, making it unfavorable for items that require 'breathing'.
The first and second polytetrafluoroethylene hydrophobic layers are respectively provided on the upper and lower surfaces of the pearl cotton substrate layer, and breathable channels with differentiated pore sizes are designed to form the first and second permeable channels arranged vertically, and the polytetrafluoroethylene layer prevents the Moisture penetrates to keep gas flowing.
It realizes the dual functions of pearl cotton, waterproof and breathable, avoids the accumulation of internal moisture and heat, adapts to a more demanding use environment, and improves its protective performance in packaging.
Smart Images
Figure CN222271533U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of packaging materials, in particular to waterproof and breathable pearl cotton. Background Art
[0002] In the current market, pearl cotton is widely used in various packaging and protection fields, such as packaging of electronic products, furniture, medical equipment, etc. Due to its light weight and soft characteristics, pearl cotton can effectively absorb and disperse impact force, thereby protecting the items in the package from damage. However, its performance in waterproofness and breathability is relatively weak.
[0003] Traditional pearl cotton is mainly made of polyethylene material. Although this material has a certain degree of moisture resistance, it will still absorb moisture when it encounters a continuous humid environment or direct contact with water. Long-term moisture exposure may cause damage to the material structure and reduce its protective performance. In addition, although the closed-cell structure of traditional pearl cotton helps to provide buffering protection, the sealing of this structure also limits its air permeability, making it easy for moisture and heat to accumulate inside the package, which is not good for items that need to "breathe" such as certain foods and medical products.
[0004] In order to solve the above problems, the present application provides a waterproof and breathable pearl cotton. Utility Model Content
[0005] The purpose of the utility model is to provide a pearl cotton with better waterproof and breathable performance in view of the shortcomings of the prior art.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A waterproof and breathable pearl cotton, comprising a pearl cotton substrate layer, a first polytetrafluoroethylene hydrophobic layer arranged on the upper surface of the pearl cotton substrate layer, and a second polytetrafluoroethylene hydrophobic layer arranged on the lower surface of the pearl cotton substrate layer;
[0008] The pearl cotton is provided with a plurality of first air permeable channels which sequentially penetrate the first polytetrafluoroethylene hydrophobic layer, the pearl cotton base material layer and the second polytetrafluoroethylene hydrophobic layer, the pearl cotton base material layer is provided with a second air permeable channel which is connected with the first air permeable channel, and the first air permeable channel is vertically arranged with the second air permeable channel;
[0009] The pore size D1 of the first air permeable channel located in the first polytetrafluoroethylene hydrophobic layer or the second polytetrafluoroethylene hydrophobic layer is smaller than the pore size D2 located in the pearl cotton substrate layer, and D1 and D2 satisfy the relationship: D1:D2=1:(2-3).
[0010] In some embodiments according to the present invention, a plurality of reinforcing protrusions are disposed on the surfaces of the first polytetrafluoroethylene hydrophobic layer and the second polytetrafluoroethylene hydrophobic layer.
[0011] In some embodiments of the utility model, a first sponge sound-absorbing layer is provided between the pearl cotton substrate layer and the first polytetrafluoroethylene hydrophobic layer, and a second sponge sound-absorbing layer is provided between the pearl cotton substrate layer and the second polytetrafluoroethylene hydrophobic layer; the first sponge sound-absorbing layer and the second sponge sound-absorbing layer both have a wavy channel structure inside.
[0012] In some embodiments of the present invention, a bamboo charcoal fiber layer is further provided between the pearl cotton substrate layer and the first polytetrafluoroethylene hydrophobic layer, and a glass fiber layer is further provided between the pearl cotton substrate layer and the second polytetrafluoroethylene hydrophobic layer.
[0013] In some embodiments according to the present invention, the thickness h1 of the pearl cotton substrate layer, the thickness h2 of the first polytetrafluoroethylene hydrophobic layer and the thickness h3 of the second polytetrafluoroethylene hydrophobic layer satisfy the relationship: h1>h2=h3.
[0014] In some embodiments of the present invention, the thickness h1 of the pearl cotton substrate layer is 2 to 10 mm.
[0015] In some embodiments according to the present invention, the thickness h2 of the first polytetrafluoroethylene hydrophobic layer and the thickness h3 of the second polytetrafluoroethylene hydrophobic layer are both 1-5 mm.
[0016] In some embodiments of the present invention, the porosity of the pearl cotton substrate layer is 60-80%.
[0017] In some embodiments according to the utility model, a plurality of connection protrusions are provided on both side surfaces of the pearl cotton substrate layer, and the first polytetrafluoroethylene hydrophobic layer and the second polytetrafluoroethylene hydrophobic layer are respectively provided with connection grooves matching with the connection protrusions.
[0018] The beneficial effects of the utility model are as follows: the utility model is a waterproof and breathable pearl cotton, comprising a pearl cotton substrate layer, a first polytetrafluoroethylene hydrophobic layer arranged on the upper surface of the pearl cotton substrate layer, and a second polytetrafluoroethylene hydrophobic layer arranged on the lower surface of the pearl cotton substrate layer; the pearl cotton is provided with a plurality of first air permeable channels which sequentially penetrate the first polytetrafluoroethylene hydrophobic layer, the pearl cotton substrate layer and the second polytetrafluoroethylene hydrophobic layer, the pearl cotton substrate layer is provided with a second air permeable channel connected to the first air permeable channel inside the pearl cotton substrate layer, and the first air permeable channel is vertically arranged to the second air permeable channel; the aperture D1 of the first air permeable channel located in the first polytetrafluoroethylene hydrophobic layer or the second polytetrafluoroethylene hydrophobic layer is smaller than the aperture D2 located in the pearl cotton substrate layer, and D1 and D2 satisfy the relationship: D1:D2=1:(2~3). Compared with the prior art, the utility model realizes the dual functions of waterproof and breathable by respectively arranging a first polytetrafluoroethylene hydrophobic layer and a second polytetrafluoroethylene hydrophobic layer on the upper and lower surfaces of the pearl cotton substrate layer, and by designing air permeable channels with differentiated pore sizes; the polytetrafluoroethylene layer can effectively prevent moisture from penetrating due to its highly hydrophobic property, while the internal channels with larger pore sizes maintain good air permeability, avoiding internal moisture and heat accumulation, thereby adapting to more demanding use environments; vertically arranged first and second air permeable channels are provided in the pearl cotton, and the pore sizes of the first air permeable channels in different layers are different, forming a D1:D2=1:(2~3) pore size ratio design, which effectively prevents moisture from passing through and allows gas to flow smoothly. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the structure of Example 1 of the present utility model.
[0020] In the figure: 1. Pearl cotton substrate layer; 2. First polytetrafluoroethylene hydrophobic layer; 3. Second polytetrafluoroethylene hydrophobic layer; 4. First air permeable channel; 5. Second air permeable channel; 6. Reinforced protrusion. DETAILED DESCRIPTION
[0021] In order to make the technical solution and advantages of the utility model clearer, the utility model and its beneficial effects will be further described in detail below in combination with specific implementation methods and drawings of the specification, but the implementation methods of the utility model are not limited thereto.
[0022] Example 1
[0023] like Figure 1 As shown, a waterproof and breathable pearl cotton provided in this embodiment includes a pearl cotton substrate layer 1, a first polytetrafluoroethylene hydrophobic layer 2 arranged on the upper surface of the pearl cotton substrate layer 1, and a second polytetrafluoroethylene hydrophobic layer 3 arranged on the lower surface of the pearl cotton substrate layer 1;
[0024] The pearl cotton is provided with a plurality of first air permeable channels 4 which sequentially penetrate the first polytetrafluoroethylene hydrophobic layer 2, the pearl cotton substrate layer 1 and the second polytetrafluoroethylene hydrophobic layer 3, the pearl cotton substrate layer 1 is provided with a second air permeable channel 5 which is connected with the first air permeable channel 4, and the first air permeable channel 4 is vertically arranged with the second air permeable channel 5;
[0025] The pore size D1 of the first air permeable channel 4 located in the first polytetrafluoroethylene hydrophobic layer 2 or the second polytetrafluoroethylene hydrophobic layer 3 is smaller than the pore size D2 located in the pearl cotton substrate layer 1, and D1 and D2 satisfy the relationship: D1:D2=1:(2-3), preferably 1:3.
[0026] In this embodiment, the surfaces of the first polytetrafluoroethylene hydrophobic layer 2 and the second polytetrafluoroethylene hydrophobic layer 3 are both provided with a plurality of reinforcing protrusions 6. Providing the reinforcing protrusions 6 on the surface increases the mechanical strength and durability of the pearl cotton, making the pearl cotton more stable and durable when subjected to external pressure, and is suitable for use in packaging and cushioning materials requiring high protection.
[0027] In this embodiment, the layers can be formed into an integrated sheet structure by a heat-pressing bonding or spraying process known in the art.
[0028] The utility model realizes the dual functions of waterproof and breathable by respectively arranging a first polytetrafluoroethylene hydrophobic layer 2 and a second polytetrafluoroethylene hydrophobic layer 3 on the upper and lower surfaces of an EPE substrate layer 1, and designing air permeable channels with differentiated apertures; the polytetrafluoroethylene layer can effectively prevent water from penetrating due to its highly hydrophobic property, while the internal channels with larger apertures maintain good air permeability, avoiding internal moisture and heat accumulation, thereby adapting to more demanding use environments; vertically arranged first air permeable channels 4 and second air permeable channels 5 are provided in the EPE, and the apertures of the first air permeable channels 4 in different layers are different, forming an aperture ratio design of D1:D2=1:(2-3), effectively preventing water from passing through, while allowing gas to flow smoothly.
[0029] Example 2
[0030] Different from Example 1, a first sponge sound-absorbing layer is further provided between the pearl cotton substrate layer 1 and the first polytetrafluoroethylene hydrophobic layer 2, and a second sponge sound-absorbing layer is further provided between the pearl cotton substrate layer 1 and the second polytetrafluoroethylene hydrophobic layer 3; the first sponge sound-absorbing layer and the second sponge sound-absorbing layer both have a wavy channel structure inside. By providing a sponge sound-absorbing layer with a wavy channel structure, it not only enhances the sound absorption effect, but also optimizes the airflow path, further improving the overall air permeability. This makes the pearl cotton of the present invention suitable for environments that require noise reduction while maintaining ventilation.
[0031] The other structures are the same as those in Example 1 and will not be described in detail here.
[0032] Example 3
[0033] Different from Example 1, a bamboo charcoal fiber layer is further provided between the pearl cotton substrate layer 1 and the first polytetrafluoroethylene hydrophobic layer 2, and a glass fiber layer is further provided between the pearl cotton substrate layer 1 and the second polytetrafluoroethylene hydrophobic layer 3. The bamboo charcoal fiber layer is particularly suitable for places with special requirements for sanitary environment due to its natural deodorizing and antibacterial properties; while the glass fiber layer provides additional thermal stability and high temperature resistance, and is suitable for applications that may be exposed to high temperature environments.
[0034] The other structures are the same as those in Example 1 and will not be described in detail here.
[0035] Example 4
[0036] Different from Example 1, the thickness h1 of the pearl cotton substrate layer 1, the thickness h2 of the first polytetrafluoroethylene hydrophobic layer 2, and the thickness h3 of the second polytetrafluoroethylene hydrophobic layer 3 of this embodiment satisfy the relationship: h1>h2=h3. The thickness h1 of the pearl cotton substrate layer 1 is 2-10 mm, preferably 7 mm; the thickness h2 of the first polytetrafluoroethylene hydrophobic layer 2 and the thickness h3 of the second polytetrafluoroethylene hydrophobic layer 3 are both 1-5 mm, preferably 3 mm; the porosity of the pearl cotton substrate layer 1 is 60-80%, preferably 70%. By precisely controlling the thickness ratio of the pearl cotton substrate layer 1 and the first and second polytetrafluoroethylene hydrophobic layers 3 and the porosity of the pearl cotton substrate layer 1, it is ensured that the pearl cotton maximizes the waterproof and breathable function while maintaining light weight and cushioning properties.
[0037] The other structures are the same as those in Example 1 and will not be described in detail here.
[0038] Example 5
[0039] Different from Example 1, the two side surfaces of the pearl cotton substrate layer 1 of this embodiment are provided with a plurality of connection protrusions, and the first polytetrafluoroethylene hydrophobic layer 2 and the second polytetrafluoroethylene hydrophobic layer 3 are respectively provided with connection grooves matched with the connection protrusions. In this way, the pearl cotton substrate layer and the polytetrafluoroethylene hydrophobic layer can be connected with each other in a concave-convex manner, thereby improving the interlayer connection strength and thus improving the durability of the pearl cotton.
[0040] The other structures are the same as those in Example 1 and will not be described in detail here.
[0041] According to the disclosure and teaching of the above description, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the above specific implementation, and any obvious improvement, replacement or modification made by the technicians in this field on the basis of the utility model belongs to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of explanation and do not constitute any limitation to the utility model.
Claims
1. A waterproof and breathable pearl cotton, characterized by: It comprises an EPE substrate layer, a first polytetrafluoroethylene hydrophobic layer arranged on the upper surface of the EPE substrate layer, and a second polytetrafluoroethylene hydrophobic layer arranged on the lower surface of the EPE substrate layer; The pearl cotton is provided with a plurality of first air permeable channels which sequentially penetrate the first polytetrafluoroethylene hydrophobic layer, the pearl cotton base material layer and the second polytetrafluoroethylene hydrophobic layer, the pearl cotton base material layer is provided with a second air permeable channel which is connected with the first air permeable channel, and the first air permeable channel is vertically arranged with the second air permeable channel; The pore size D1 of the first air permeable channel located in the first polytetrafluoroethylene hydrophobic layer or the second polytetrafluoroethylene hydrophobic layer is smaller than the pore size D2 located in the pearl cotton substrate layer, and D1 and D2 satisfy the relationship: D1:D2=1:(2-3).
2. The waterproof and breathable pearl cotton according to claim 1, characterized in that: The surfaces of the first polytetrafluoroethylene hydrophobic layer and the second polytetrafluoroethylene hydrophobic layer are both provided with a plurality of reinforcing protrusions.
3. The waterproof and breathable pearl cotton according to claim 1, characterized in that: A first sponge sound-absorbing layer is provided between the pearl cotton substrate layer and the first polytetrafluoroethylene hydrophobic layer, and a second sponge sound-absorbing layer is provided between the pearl cotton substrate layer and the second polytetrafluoroethylene hydrophobic layer; the first sponge sound-absorbing layer and the second sponge sound-absorbing layer both have a wavy channel structure inside.
4. The waterproof and breathable pearl cotton according to claim 1, characterized in that: A bamboo charcoal fiber layer is further arranged between the pearl cotton substrate layer and the first polytetrafluoroethylene hydrophobic layer, and a glass fiber layer is further arranged between the pearl cotton substrate layer and the second polytetrafluoroethylene hydrophobic layer.
5. The waterproof and breathable pearl cotton according to claim 1, characterized in that: The thickness h1 of the pearl cotton substrate layer, the thickness h2 of the first polytetrafluoroethylene hydrophobic layer and the thickness h3 of the second polytetrafluoroethylene hydrophobic layer satisfy the relationship: h1>h2=h3.
6. The waterproof and breathable pearl cotton according to claim 5, characterized in that: The thickness h1 of the pearl cotton substrate layer is 2 to 10 mm.
7. The waterproof and breathable pearl cotton according to claim 6, characterized in that: The thickness h2 of the first polytetrafluoroethylene hydrophobic layer and the thickness h3 of the second polytetrafluoroethylene hydrophobic layer are both 1 to 5 mm.
8. The waterproof and breathable pearl cotton according to claim 1, characterized in that: The porosity of the pearl cotton substrate layer is 60-80%.
9. The waterproof and breathable pearl cotton according to claim 1, characterized in that: Both side surfaces of the pearl cotton substrate layer are provided with a plurality of connection protrusions, and the first polytetrafluoroethylene hydrophobic layer and the second polytetrafluoroethylene hydrophobic layer are respectively provided with connection grooves matched with the connection protrusions.