Skin-touch breathable waterborne polyurethane foaming coating
By introducing hollow thermoplastic microspheres and mechanical foaming technology into polyurethane foam coatings, a waterproof, breathable, and weather-resistant waterborne polyurethane foam coating with a good skin feel was prepared. This solved the problems of insufficient weather resistance, feel, and waterproofness of polyurethane foam coatings, and improved the service life and comfort of the product.
Patent Information
- Application Number
- CN202520364629.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-04
AI Technical Summary
Existing polyurethane foam coatings have shortcomings in terms of weather resistance, feel, and water resistance, which affect their application performance and service life in outdoor products and medical supplies.
The structure includes a coating layer, a waterborne polyurethane foam layer, and a substrate layer. The waterborne polyurethane foam layer contains hollow thermoplastic microspheres with a pore diameter of 0.1~30μm, which allows water vapor to pass through but prevents water droplets from passing through. It is prepared by combining mechanical foaming and baking processes.
It achieves waterproof and breathable properties, excellent weather resistance, and a smooth feel, making it suitable for applications such as close-fitting fabrics, gloves, and footwear where touch and wearing comfort are paramount.
Smart Images
Figure CN223951486U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to polyurethane material technical field, concretely relates to a skin feeling breathable waterborne polyurethane foaming coating. BACKGROUND
[0002] In modern industry and daily life, polyurethane foaming coating is widely used in many fields such as clothing, shoe material, medical supplies and the like due to its good breathability. However, the existing polyurethane foaming coating has significant problems in actual application.
[0003] The weather resistance of the common polyurethane foaming coating in the current market is usually difficult to meet the actual demand. When being in various climatic conditions such as high temperature, high humidity and strong ultraviolet light for a long time, aging, embrittlement and discoloration and the like are prone to occur, thereby affecting the performance and service life of the coating. This not only increases the product maintenance cost, but also limits its application in fields with higher requirements for weather resistance. For example, in the field of outdoor products such as tents, backpacks and the like, if the weather resistance of the polyurethane foaming coating used is poor, after being exposed to wind, sun and rain for a period of time, problems such as coating rupture and reduction of breathability are likely to occur, which adversely affects the product quality and use effect. In the field of medical supplies such as protective masks and surgical gowns, if the weather resistance of the polyurethane breathable foaming coating is poor, the protective performance is likely to be reduced, which poses a potential threat to the health of the user.
[0004] The existing polyurethane foaming coating also has deficiencies in hand feeling. The surface of some products is rough, lacks soft and smooth texture, and brings an uncomfortable experience to the user, which is particularly prominent in application scenarios such as close-fitting clothes, gloves and shoes that have high requirements for touch feeling and wearing comfort.
[0005] In addition, the water resistance of the existing polyurethane foaming coating is poor. Due to the existence of the foaming layer, the porosity is high, and water is easy to penetrate, resulting in poor waterproof ability. For outdoor sports products, this is a fatal defect. TECHNICAL FIELD
[0006] The technical problem to be solved by the utility model is to provide a skin feeling breathable waterborne polyurethane foaming coating with tender and smooth hand feeling, waterproof and moisture permeability, weather resistance and environmental protection.
[0007] In order to solve the above technical problems, the utility model adopts the technical scheme of providing a skin feeling breathable waterborne polyurethane foaming coating, which comprises a finishing layer, a waterborne polyurethane foaming layer and a substrate layer arranged in sequence.
[0008] The cells of the waterborne polyurethane foaming layer are formed by mechanical foaming, and the diameter range of the cells is such that water droplets cannot pass through the foaming layer, while water vapor can pass through.
[0009] Furthermore, in the above-mentioned skin-feeling and breathable waterborne polyurethane foam coating, the pore diameter of the waterborne polyurethane foam layer is 0.1~30μm.
[0010] Furthermore, in the above-mentioned skin-feeling breathable waterborne polyurethane foam coating, the coating layer has a thickness of 10~50μm; the waterborne polyurethane foam layer has a thickness of 80~500μm.
[0011] Furthermore, in the above-mentioned skin-feeling and breathable waterborne polyurethane foam coating, the thickness of the coating layer is 50 μm, and the thickness of the waterborne polyurethane foam layer is 350 μm.
[0012] Furthermore, in the above-mentioned skin-feeling breathable waterborne polyurethane foam coating, the thickness of the coating layer is 10 μm, and the thickness of the waterborne polyurethane foam layer is 80 μm.
[0013] Furthermore, in the above-mentioned skin-feeling and breathable waterborne polyurethane foam coating, the thickness of the coating layer is 25 μm, and the thickness of the waterborne polyurethane foam layer is 500 μm.
[0014] Furthermore, in the above-mentioned skin-feeling breathable waterborne polyurethane foam coating, the substrate layer is selected from one of nylon, polyester, cotton, acrylic fiber, or non-woven fabric.
[0015] The beneficial effects of this invention are as follows: In the skin-feeling and breathable waterborne polyurethane foam coating described in this invention, the waterborne polyurethane foam layer has a large number of pores with a pore diameter of 0.1~30μm. Within this diameter range, water droplets cannot pass through the foam layer, while water vapor and other gases can easily pass through it. Therefore, the waterborne polyurethane foam layer has good waterproof and breathable properties. The waterborne polyurethane foam layer contains hollow thermoplastic microspheres, which further reduce the weight of the foam layer while ensuring its strength, giving it a fluffy and soft feel.
[0016] The skin-feeling and breathable waterborne polyurethane foam coating of this utility model has the characteristics of smooth feel, soft and lightweight, waterproof and breathable, good weather resistance, and green environmental protection. It is especially suitable for application scenarios such as close-fitting fabrics, gloves, and shoes, where the requirements for touch and wearing comfort are high. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the skin-feeling and breathable waterborne polyurethane foam coating in a specific embodiment of the present utility model.
[0018] Figure 2 A magnified 100x view of the waterborne polyurethane foam layer of the skin-feeling and breathable waterborne polyurethane foam coating in a specific embodiment of this utility model.
[0019] Label Explanation:
[0020] 1, finishing layer; 2, water-based polyurethane foaming layer; 3, substrate layer. DETAILED DESCRIPTION
[0021] To illustrate the technical content of the utility model, the purposes and effects achieved, the following will be described in conjunction with the embodiments and the accompanying drawings.
[0022] Please refer to Figure 1 The utility model provides a kind of skin feel breathable water-based polyurethane foaming coating, including the finishing layer 1, water-based polyurethane foaming layer 2 and substrate layer 3 arranged in sequence;Hollow thermoplastic microspheres are provided in the water-based polyurethane foaming layer 2;
[0023] The cell of the water-based polyurethane foaming layer is formed by mechanical foaming, and the diameter range of the cell makes water droplets unable to pass through the foaming layer, while water vapor can pass through.
[0024] The finishing layer can be any existing finishing layer, for example, prepared by coating, baking and other processes with surface coating, and the surface coating can be water-based skin feel treatment agent 7702 of Zhejiang Xinnuo High Polymer Material Co., Ltd. Alternatively, the surface coating can be prepared by existing process, and the surface coating can be obtained by mechanically mixing skin feel matte resin, anti-scratch and smoothness aid, hydrophobic agent, wetting agent and defoaming agent. After coating, the surface coating is placed in an oven for drying.
[0025] The thickness of the water-based polyurethane foaming layer is 80-500 μm.
[0026] The water-based polyurethane foaming layer has a large number of cells with a diameter of 0.1-30 μm. Within this diameter range, water droplets cannot pass through the foaming layer, while water vapor and other gases can easily pass through the foaming layer. Therefore, the water-based polyurethane foaming layer has good waterproof and moisture permeable effect.
[0027] The water-based polyurethane foaming layer contains hollow thermoplastic microspheres, which further reduces the weight of the foaming layer while ensuring the strength of the foaming layer, so that the foaming layer has a fluffy and soft feel.
[0028] The water-based polyurethane foaming layer can be prepared by coating the surface of the substrate with aliphatic water-based polyurethane dispersion, water-wet lightweight hollow thermoplastic microspheres, foam stabilizer and wetting agent after foaming, and then properly heating and baking. The water-based polyurethane foaming layer is uniformly coated on the substrate by means of coating machine. After coating, the water-based polyurethane foaming layer is placed in an oven for drying.
[0029] The water-based polyurethane foaming layer can also be adjusted in color by adding an appropriate amount of titanium dioxide and color paste of appropriate color to meet the color requirements of various fabrics.
[0030] The substrate can be selected from nylon, polyester, cotton, acrylic, non-woven fabric and other fabric materials.
[0031] Example 1
[0032] A skin-feeling breathable waterborne polyurethane foaming coating layer, comprising a finishing layer, a waterborne polyurethane foaming layer and a substrate layer arranged in sequence; hollow thermoplastic microspheres are arranged in the waterborne polyurethane foaming layer; the hollow thermoplastic microspheres are water-wetted light hollow thermoplastic microspheres Cplus® 4035 of Fujian Poly Micro Material Technology Co., Ltd.
[0033] The cells of the waterborne polyurethane foaming layer are formed by mechanical foaming, and the diameter of the cells is in a range that allows water droplets to be unable to pass through the foaming layer, but water vapor to be able to pass through.
[0034] The diameter of the cells of the waterborne polyurethane foaming layer is 0.1-30 μm.
[0035] Preparation of the foaming layer of the finishing layer: the aliphatic waterborne polyurethane dispersion is placed in a reaction kettle, and fillers, foam stabilizers and wetting agents are sequentially added under stirring, the stirring rate and time are controlled, the related parameters of the foaming machine are adjusted, and the size and density of the cells are adjusted. After the foaming step is completed, the obtained foaming material is uniformly coated on the substrate layer. During the coating process, the thickness of the coating layer needs to be uniform and consistent, and then the coated material is placed in an oven for drying and taken out for cooling. The thickness of the foaming layer is about 350 μm.
[0036] Preparation of the finishing layer: the waterborne skin-feeling treatment agent 7702 is uniformly coated on the foaming layer, and placed in an oven for drying. The thickness of the finishing layer is about 50 μm, and a skin-feeling breathable waterborne polyurethane foaming coating layer is obtained.
[0037] The substrate layer is cotton.
[0038] Example 2
[0039] A skin-feeling breathable waterborne polyurethane foaming coating layer, comprising a finishing layer, a waterborne polyurethane foaming layer and a substrate layer arranged in sequence; hollow thermoplastic microspheres are arranged in the waterborne polyurethane foaming layer; the hollow thermoplastic microspheres are water-wetted light hollow thermoplastic microspheres Cplus® 4035 of Fujian Poly Micro Material Technology Co., Ltd.
[0040] The cells of the waterborne polyurethane foaming layer are formed by mechanical foaming, and the diameter of the cells is in a range that allows water droplets to be unable to pass through the foaming layer, but water vapor to be able to pass through.
[0041] The diameter of the cells of the waterborne polyurethane foaming layer is 10 μm.
[0042] The coating layer is prepared as follows: the aliphatic waterborne polyurethane dispersion is placed in a reaction kettle, and fillers, foam stabilizers, wetting agents are sequentially added under stirring, the stirring rate and time are controlled, the related parameters of the foaming machine are adjusted, and the size and density of the foam cells are adjusted. After the foaming step is completed, the obtained foamed material is uniformly coated on the substrate layer. During the coating process, the thickness of the coating layer needs to be uniform and consistent, and then the coated material is placed in an oven for drying and taken out for cooling. The thickness of the foamed layer is about 80 μm.
[0043] The coating layer is prepared as follows: the aliphatic waterborne polyurethane dispersion is placed in a reaction kettle, and fillers, foam stabilizers, wetting agents are sequentially added under stirring, the stirring rate and time are controlled, the related parameters of the foaming machine are adjusted, and the size and density of the foam cells are adjusted. After the foaming step is completed, the obtained foamed material is uniformly coated on the substrate layer. During the coating process, the thickness of the coating layer needs to be uniform and consistent, and then the coated material is placed in an oven for drying and taken out for cooling. The thickness of the foamed layer is about 80 μm.
[0044] The substrate layer is cotton.
[0045] Example 3
[0046] A skin-feeling breathable waterborne polyurethane foamed coating layer, comprising a coating layer, a waterborne polyurethane foamed layer and a substrate layer arranged in sequence; the waterborne polyurethane foamed layer is provided with hollow thermoplastic microspheres;
[0047] The foam cells of the waterborne polyurethane foamed layer are formed by mechanical foaming, and the diameter range of the foam cells is such that water droplets cannot pass through the foamed layer, while water vapor can pass through.
[0048] The diameter of the foam cells of the waterborne polyurethane foamed layer is 30 μm.
[0049] The coating layer is prepared as follows: the aliphatic waterborne polyurethane dispersion is placed in a reaction kettle, and fillers, foam stabilizers, wetting agents are sequentially added under stirring, the stirring rate and time are controlled, the related parameters of the foaming machine are adjusted, and the size and density of the foam cells are adjusted. After the foaming step is completed, the obtained foamed material is uniformly coated on the substrate layer. During the coating process, the thickness of the coating layer needs to be uniform and consistent, and then the coated material is placed in an oven for drying and taken out for cooling. The thickness of the foamed layer is about 80 μm.
[0050] The coating layer is prepared as follows: the aliphatic waterborne polyurethane dispersion is placed in a reaction kettle, and fillers, foam stabilizers, wetting agents are sequentially added under stirring, the stirring rate and time are controlled, the related parameters of the foaming machine are adjusted, and the size and density of the foam cells are adjusted. After the foaming step is completed, the obtained foamed material is uniformly coated on the substrate layer. During the coating process, the thickness of the coating layer needs to be uniform and consistent, and then the coated material is placed in an oven for drying and taken out for cooling. The thickness of the foamed layer is about 80 μm.
[0051] The substrate layer is nylon.
[0052] Example 4
[0053] The skin-feeling breathable waterborne polyurethane foamed coating layer obtained in Example 1 is subjected to moisture permeability test according to ASTM E-96A and hydrostatic pressure test according to AATCC 127.
[0054] The test result shows that the skin-feeling breathable waterborne polyurethane foaming coating A has a moisture permeation amount ≥5000g / (m 2 ·24h) and a hydrostatic pressure ≥6000mm H2O, realizing waterproof and moisture permeation performance, which enables the product to quickly discharge the human body sweat vapor and significantly improves the wearing comfort.
[0055] Figure 2 The skin-feeling breathable waterborne polyurethane foaming coating obtained in Example 1 is enlarged 100 times to obtain a cell diagram. From Figure 2 It can be seen that the cell of the skin-feeling breathable waterborne polyurethane foaming coating is uniform and delicate, meeting the waterproof and moisture permeation foaming coating requirement.
[0056] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent transformation, direct or indirect application in related technical fields by using the content of the present application specification and drawings are also included in the patent protection range of the present application.
Claims
1. A skin-feel, breathable, aqueous polyurethane foamed coating characterized by, The coating layer, the water-based polyurethane foaming layer and the substrate layer are sequentially arranged; the water-based polyurethane foaming layer is provided with hollow thermoplastic microspheres; The cell of the water-based polyurethane foaming layer is formed by mechanical foaming, and the diameter of the cell is in a range that water droplets cannot pass through the foaming layer, but water vapor can pass through.
2. The breathable, skin-feel, aqueous polyurethane foam coating of claim 1, wherein, The diameter of the cell of the water-based polyurethane foaming layer is 0.1-30 μm.
3. The breathable, skin-feel, aqueous polyurethane foam coating of claim 1, wherein, The thickness of the coating layer is 10-50 μm, and the thickness of the water-based polyurethane foaming layer is 80-500 μm.
4. The breathable, skin-feel, aqueous polyurethane foam coating of claim 1, wherein, The thickness of the coating layer is 50 μm, and the thickness of the water-based polyurethane foaming layer is 350 μm.
5. The breathable, skin-feel, aqueous polyurethane foam coating of claim 1, wherein, The thickness of the coating layer is 10 μm, and the thickness of the water-based polyurethane foaming layer is 80 μm.
6. The breathable, skin-feel, aqueous polyurethane foam coating of claim 1, wherein, The thickness of the coating layer is 25 μm, and the thickness of the water-based polyurethane foaming layer is 500 μm.
7. The breathable, skin-feel, aqueous polyurethane foam coating of claim 1, wherein, The substrate layer is selected from one of nylon, polyester, cotton, acrylic or non-woven fabric.