Multifunctional rainproof cloth and preparation method thereof

Abstract

The invention belongs to the technical field of rainproof cloth preparation, and discloses multifunctional rainproof cloth and a preparation method thereof.The preparation method includes the steps that PVC plastic-coated cloth is selected as a base layer, and the base layer is pretreated for use; the preparation method comprises the following steps: mixing nano-scale inorganic particles, polyurethane resin, a silane coupling agent and a solvent in certain parts by mass, sieving, and standing to obtain a nano waterproof coating material; the method comprises the following steps: uniformly coating the surface of a base layer with a nano waterproof coating material to form a compact nano waterproof coating, carrying out heat treatment on the nano waterproof coating, coating the surface of the nano waterproof coating with an ultraviolet absorption layer, coating the outer side of the ultraviolet absorption layer with a hydrophobic nano composite material layer, and enhancing the hardness and wear resistance of the coating by utilizing a curing technology; and testing the performance of the prepared multifunctional rainproof cloth. By coating the nano waterproof coating material, a compact waterproof layer is formed, moisture permeation is effectively blocked, the waterproof performance of the waterproof cloth is ensured, and the balance of waterproofness and breathability can be realized.

Description

Technical Field

[0001] The invention belongs to the technical field of rainproof cloth preparation, and in particular relates to a multifunctional rainproof cloth and a preparation method thereof. Background Art

[0002] At present, rainproof cloth, as a functional fabric, has been widely used in modern society, especially in outdoor activities, cargo transportation and building protection. Traditional rainproof cloth is mainly made of synthetic materials such as polyester fiber and PVC resin, which give the rainproof cloth basic properties such as waterproof, windproof and shockproof, and can resist external damage such as acid, alkali, pollutants, etc. to a certain extent. However, with the advancement of science and technology and the improvement of people's living standards, the functional requirements for rainproof cloth are also increasing.

[0003] Although traditional rainproof cloth performs well in terms of waterproofing and windproofing, it still has some defects in terms of versatility. First, the air permeability of traditional rainproof cloth is poor, and long-term use can easily lead to internal moisture, affecting the user experience. Secondly, traditional rainproof cloth performs generally in terms of weather resistance and aging resistance, and is easily affected by factors such as sunlight and ultraviolet rays, resulting in performance degradation. In addition, traditional rainproof cloth also has deficiencies in terms of environmental protection and recyclability, which is inconsistent with the current concept of green development. To this end, the present invention provides a multifunctional rainproof cloth and a preparation method thereof. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present invention provides a multifunctional rainproof cloth and a preparation method thereof.

[0005] The technical solution of the present invention is as follows: A method for preparing a multifunctional rainproof cloth comprises the following steps: Step S1: Select PVC coated cloth as the base layer, and pre-treat the base layer for standby use; Step S2: taking 20-30 parts by mass of nanometer-scale inorganic particles, 30-45 parts by mass of polyurethane resin, 5-10 parts by mass of silane coupling agent and 40-50 parts by mass of solvent, mixing them, sieving them and letting them stand to obtain a nanometer waterproof coating material; Step S3: uniformly coating the nano waterproof coating material on the surface of the base layer to form a dense nano waterproof coating, and heat treating the nano waterproof coating to make the coating and the base material closely bonded; Step S4: coating a layer of ultraviolet absorption layer on the surface of the nano waterproof coating, coating a layer of hydrophobic nano composite material layer on the outside of the ultraviolet absorption layer, and using curing technology to enhance the hardness and wear resistance of the coating; Step S5: testing the prepared multifunctional rainproof cloth for waterproofness, air permeability, weather resistance, and tensile strength, and handling unqualified products.

[0006] In one embodiment, in step S1, the specific steps of pre-treating the base layer include: Add detergent to wipe and clean the surface of the PVC coated fabric to remove impurities on the surface of the PVC coated fabric, and rinse with clean water; Detect surface defects of PVC coated fabrics to ensure that there are no damage, cracks or wrinkles on the surface of PVC coated fabrics; After the PVC coated cloth is surface treated, it is dried using drying equipment.

[0007] In one embodiment, the specific steps of surface treating the PVC coated fabric include: Use mechanical grinding to grind the surface of PVC coated fabric to increase the roughness; Chemically treat the surface of PVC coated fabric to improve the surface adhesion of the base layer; Apply a layer of primer or interface agent on the surface of the PVC coated cloth.

[0008] In one embodiment, the specific steps of chemically treating the surface of the PVC coated fabric include: Prepare chemical treatment solution: select surfactant as chemical treatment agent and prepare chemical treatment solution at a concentration of 5-10 g / L; Apply chemical treatment solution: Use dipping, spraying or brushing methods to evenly apply the prepared chemical treatment solution to the surface of the PVC coated fabric, so that the chemical treatment solution fully infiltrates and covers the entire surface; Wait for reaction and drying: After applying the chemical treatment solution, let the chemical treatment solution stay on the surface of the PVC coated fabric for 20 to 30 minutes, and dry the treated PVC coated fabric to remove excess water or solvent.

[0009] In one embodiment, the nano-scale inorganic particles are nano-silicon dioxide, nano-aluminum oxide or nano-titanium dioxide.

[0010] In one embodiment, the solvent is a mixed solution of water, butanone and toluene, and the mixing ratio of water, butanone and toluene is 5-6:2-3:4-5.

[0011] In one embodiment, in step S4, the ultraviolet absorbing layer is doped with a light stabilizer or an antioxidant, and the coating thickness of the ultraviolet absorbing layer is 5-15 μm.

[0012] In one embodiment, the hydrophobic nanocomposite material layer is composed of nanoparticles and a hydrophobic modifier, wherein the nanoparticles are one or a mixture of silicon dioxide, aluminum oxide and titanium dioxide, and the hydrophobic modifier is a fluoride or a long-chain alkyl silane.

[0013] In one embodiment, in step S4, when using curing technology to enhance the hardness and wear resistance of the coating, ultraviolet curing is used for curing, the ultraviolet irradiance is 120~180mW / cm², and the curing time is 1~1.5min.

[0014] Another object of the present invention is to provide a multifunctional rainproof cloth, which is prepared by using the preparation method of the multifunctional rainproof cloth.

[0015] Combined with the above technical solutions, the beneficial effects of the present invention are as follows: the present invention forms a dense waterproof layer by coating the nano waterproof coating material, effectively blocks the penetration of water, and ensures the waterproof performance of the rainproof cloth. The present invention achieves a balance between waterproof and breathable properties by adding an ultraviolet absorption layer and a hydrophobic nanocomposite layer outside the waterproof coating and undergoing special treatment. The ultraviolet absorption layer can effectively resist the erosion of sunlight and ultraviolet rays, slowing down the aging rate of the material. At the same time, the composite use of nano-scale inorganic particles and polyurethane resin enhances the stability and durability of the coating. The materials and preparation processes selected by the present invention meet environmental protection requirements, reduce the emission of harmful substances, and are in line with the current concept of green development.

[0016] The present invention ensures the cleanliness and integrity of the surface of the base layer through cleaning, testing and drying processes, thus providing a good foundation for subsequent coating.

[0017] The present invention increases the roughness and adhesion of the base surface through mechanical grinding and chemical treatment, and the coating of the primer or interface agent further enhances the bonding force between the coating and the base, thereby improving the stability and durability of the coating.

[0018] The present invention uses a surfactant as a chemical treatment agent and uniformly applies it to the surface of the base layer by dipping, spraying or brushing, thereby effectively improving the wettability and adhesion of the base layer and providing favorable conditions for the subsequent coating.

[0019] The present invention endows the coating with excellent physical and chemical properties, such as hardness, wear resistance, corrosion resistance, etc., by selecting nanometer-scale inorganic particles and using inorganic particles such as nano-silicon dioxide, nano-aluminum oxide or nano-titanium dioxide.

[0020] The present invention adopts a mixed solution of water, butanone and toluene as a solvent, which not only ensures the uniformity and stability of the coating, but also reduces pollution to the environment. The introduction of a light stabilizer or an antioxidant doped in the ultraviolet absorption layer further improves the resistance of the coating to ultraviolet rays and oxidation, and prolongs the service life of the rainproof cloth. The composite material layer composed of nanoparticles and hydrophobic modifiers gives the coating excellent hydrophobicity and wear resistance, and improves the practicality and durability of the rainproof cloth. Curing is performed using appropriate ultraviolet irradiance and curing time, which not only ensures the hardness and wear resistance of the coating, but also avoids the performance degradation caused by over-curing.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0023] Figure 1 is a flow chart of a method for preparing a multifunctional rainproof cloth provided by an embodiment of the present invention; Figure 2 is a flow chart of a method for pre-processing a base layer provided by an embodiment of the present invention; Figure 3 It is a flow chart of a method for surface treatment of PVC coated fabric provided by an embodiment of the present invention; Figure 4 The present invention provides a flow chart of a method for chemically treating the surface of PVC coated fabric. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0025] like Figure 1 As shown, the method for preparing the multifunctional rainproof cloth provided in the embodiment of the present invention comprises the following steps: S1: Select PVC coated cloth as the base layer, and pre-treat the base layer for later use; S2: Mix 20-30 parts by mass of nanometer-scale inorganic particles, 30-45 parts by mass of polyurethane resin, 5-10 parts by mass of silane coupling agent and 40-50 parts by mass of solvent, sieve and let stand to obtain a nanometer waterproof coating material; S3: uniformly coating the nano waterproof coating material on the surface of the base layer to form a dense nano waterproof coating, and heat treating the nano waterproof coating to make the coating and the base material closely bonded; S4: coating a layer of ultraviolet absorption layer on the surface of the nano waterproof coating, coating a layer of hydrophobic nano composite material layer on the outside of the ultraviolet absorption layer, and using curing technology to enhance the hardness and wear resistance of the coating; S5: Test the waterproofness, air permeability, weather resistance and tensile strength of the prepared multifunctional rainproof cloth, and handle unqualified products.

[0026] A method for preparing a multifunctional rainproof cloth comprises the following steps: Choose PVC coated cloth as the base layer and pre-treat it for later use; 20 parts by mass of nanometer-scale inorganic particles, 45 parts by mass of polyurethane resin, 7 parts by mass of silane coupling agent and 45 parts by mass of solvent are mixed, sieved and allowed to stand to obtain a nanometer waterproof coating material; The nano waterproof coating material is evenly coated on the surface of the base layer to form a dense nano waterproof coating, and the nano waterproof coating is heat-treated to make the coating and the base material closely bonded; A layer of ultraviolet absorption layer is coated on the surface of the nano waterproof coating, and a layer of hydrophobic nano composite material layer is coated on the outside of the ultraviolet absorption layer, and the hardness and wear resistance of the coating are enhanced by curing technology; The prepared multifunctional rainproof cloth is tested for its waterproofness, air permeability, weather resistance and tensile strength, and unqualified products are handled.

[0027] A method for preparing a multifunctional rainproof cloth comprises the following steps: Choose PVC coated cloth as the base layer and pre-treat it for later use; 25 parts by mass of nanometer-scale inorganic particles, 38 parts by mass of polyurethane resin, 10 parts by mass of silane coupling agent and 50 parts by mass of solvent are mixed, sieved and allowed to stand to obtain a nanometer waterproof coating material; The nano waterproof coating material is evenly coated on the surface of the base layer to form a dense nano waterproof coating, and the nano waterproof coating is heat-treated to make the coating and the base material closely bonded; A layer of ultraviolet absorption layer is coated on the surface of the nano waterproof coating, and a layer of hydrophobic nano composite material layer is coated on the outside of the ultraviolet absorption layer, and the hardness and wear resistance of the coating are enhanced by curing technology; The prepared multifunctional rainproof cloth is tested for its waterproofness, air permeability, weather resistance and tensile strength, and unqualified products are handled.

[0028] A method for preparing a multifunctional rainproof cloth comprises the following steps: Choose PVC coated cloth as the base layer and pre-treat it for later use; 30 parts by mass of nanometer-scale inorganic particles, 30 parts by mass of polyurethane resin, 5 parts by mass of silane coupling agent and 40 parts by mass of solvent are mixed, sieved and allowed to stand to obtain a nanometer waterproof coating material; The nano waterproof coating material is evenly coated on the surface of the base layer to form a dense nano waterproof coating, and the nano waterproof coating is heat-treated to make the coating and the base material closely bonded; A layer of ultraviolet absorption layer is coated on the surface of the nano waterproof coating, and a layer of hydrophobic nano composite material layer is coated on the outside of the ultraviolet absorption layer, and the hardness and wear resistance of the coating are enhanced by curing technology; The prepared multifunctional rainproof cloth is tested for its waterproofness, air permeability, weather resistance and tensile strength, and unqualified products are handled.

[0029] like Figure 2 As shown, in step S1 in the embodiment of the present invention, the specific steps of pre-processing the base layer include: S11: Add a detergent to wipe and clean the surface of the PVC coated fabric to remove impurities on the surface of the PVC coated fabric, and rinse with clean water; S12: Detect surface defects of PVC coated fabric to ensure that there is no damage, cracks or wrinkles on the surface of PVC coated fabric; S13: After the PVC coated fabric is surface treated, a drying device is used to perform drying treatment.

[0030] like Figure 3 As shown, the specific steps of surface treating the PVC coated cloth in the embodiment of the present invention include: S131: grinding the surface of the PVC coated fabric by mechanical grinding to increase the roughness; S132: Chemically treat the surface of PVC coated fabric to improve the surface adhesion of the base layer; S133: Apply a layer of primer or interface agent on the surface of PVC coated fabric.

[0031] like Figure 4 As shown, the specific steps of chemically treating the surface of the PVC coated cloth in the embodiment of the present invention include: S1321: preparing a chemical treatment solution: selecting a surfactant as a chemical treatment agent, and preparing a chemical treatment solution at a concentration of 5 to 10 g / L; S1322: Apply chemical treatment solution: Use dipping, spraying or brushing methods to evenly apply the prepared chemical treatment solution to the surface of the PVC coated fabric, so that the chemical treatment solution fully infiltrates and covers the entire surface; S1323: Waiting for reaction and drying: After applying the chemical treatment solution, let the chemical treatment solution stay on the surface of the PVC coated fabric for 20 to 30 minutes, and dry the treated PVC coated fabric to remove excess water or solvent.

[0032] Preferably, the nanometer-scale inorganic particles in the embodiment of the present invention are nanometer silicon dioxide, nanometer aluminum oxide or nanometer titanium dioxide.

[0033] Preferably, the solvent in the embodiment of the present invention is a mixed solution of water, butanone and toluene, and the mixing ratio of water, butanone and toluene is 5-6:2-3:4-5.

[0034] Preferably, in step S4 in the embodiment of the present invention, the ultraviolet absorbing layer is doped with a light stabilizer or an antioxidant, and the coating thickness of the ultraviolet absorbing layer is 5-15 μm.

[0035] Preferably, the hydrophobic nanocomposite material layer in the embodiment of the present invention is composed of nanoparticles and a hydrophobic modifier, wherein the nanoparticles are one or a mixture of silicon dioxide, aluminum oxide and titanium dioxide, and the hydrophobic modifier is a fluoride or a long-chain alkyl silane.

[0036] Preferably, in step S4 of the embodiment of the present invention, when using curing technology to enhance the hardness and wear resistance of the coating, ultraviolet curing is used for curing, the ultraviolet irradiance is 120~180mW / cm², and the curing time is 1~1.5min.

[0037] Another embodiment of the present invention provides a multifunctional rainproof cloth, which is prepared by using the preparation method of the multifunctional rainproof cloth.

[0038] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features can be replaced by equivalents, and these modifications or replacements should all be included in the protection scope of the present invention.

Claims

1. A method for preparing a multifunctional rainproof cloth, characterized in that: The preparation method of the multifunctional rainproof cloth comprises the following steps: Step S1: Select PVC coated cloth as the base layer, and pre-treat the base layer for standby use; Step S2: taking 20-30 parts by mass of nanometer-scale inorganic particles, 30-45 parts by mass of polyurethane resin, 5-10 parts by mass of silane coupling agent and 40-50 parts by mass of solvent, mixing them, sieving them and letting them stand to obtain a nanometer waterproof coating material; Step S3: uniformly coating the nano waterproof coating material on the surface of the base layer to form a dense nano waterproof coating, and heat treating the nano waterproof coating to make the coating and the base material closely bonded; Step S4: coating a layer of ultraviolet absorption layer on the surface of the nano waterproof coating, coating a layer of hydrophobic nano composite material layer on the outside of the ultraviolet absorption layer, and using curing technology to enhance the hardness and wear resistance of the coating; Step S5: testing the prepared multifunctional rainproof cloth for waterproofness, air permeability, weather resistance, and tensile strength, and handling unqualified products.

2. The method for preparing the multifunctional rainproof cloth according to claim 1, characterized in that: In step S1, the specific steps of pre-treating the base layer include: Add detergent to wipe and clean the surface of the PVC coated fabric to remove impurities on the surface of the PVC coated fabric, and rinse with clean water; Detect surface defects of PVC coated fabrics to ensure that there are no damage, cracks or wrinkles on the surface of PVC coated fabrics; After the PVC coated cloth is surface treated, it is dried using drying equipment.

3. The method for preparing the multifunctional rainproof cloth according to claim 2, characterized in that: The specific steps for surface treatment of PVC coated fabric include: Use mechanical grinding to grind the surface of PVC coated fabric to increase the roughness; Chemically treat the surface of PVC coated fabric to improve the surface adhesion of the base layer; Apply a layer of primer or interface agent on the surface of the PVC coated cloth.

4. The method for preparing the multifunctional rainproof cloth according to claim 3, characterized in that: The specific steps for chemical treatment of the surface of PVC coated fabric include: Prepare chemical treatment solution: select surfactant as chemical treatment agent and prepare chemical treatment solution at a concentration of 5-10 g / L; Apply chemical treatment solution: Use dipping, spraying or brushing methods to evenly apply the prepared chemical treatment solution to the surface of the PVC coated fabric, so that the chemical treatment solution fully infiltrates and covers the entire surface; Wait for reaction and drying: After applying the chemical treatment solution, let the chemical treatment solution stay on the surface of the PVC coated fabric for 20 to 30 minutes, and dry the treated PVC coated fabric to remove excess water or solvent.

5. The method for preparing the multifunctional rainproof cloth according to claim 1, characterized in that: The nanometer-scale inorganic particles are nanometer silicon dioxide, nanometer aluminum oxide or nanometer titanium dioxide.

6. The method for preparing the multifunctional rainproof cloth according to claim 1, characterized in that: The solvent is a mixed solution of water, butanone and toluene, and the mixing ratio of water, butanone and toluene is 5-6:2-3:4-5.

7. The method for preparing the multifunctional rainproof cloth according to claim 1, characterized in that: In step S4, the ultraviolet absorbing layer is doped with a light stabilizer or an antioxidant, and the coating thickness of the ultraviolet absorbing layer is 5-15 μm.

8. The method for preparing the multifunctional rainproof cloth according to claim 1, characterized in that: The hydrophobic nano composite material layer consists of nano particles and a hydrophobic modifier, wherein the nano particles are one or a mixture of silicon dioxide, aluminum oxide and titanium dioxide, and the hydrophobic modifier is a fluoride or a long-chain alkyl silane.

9. The method for preparing the multifunctional rainproof cloth according to claim 1, characterized in that: In step S4, when using curing technology to enhance the hardness and wear resistance of the coating, ultraviolet curing is used for curing, the ultraviolet irradiance is 120~180mW / cm², and the curing time is 1~1.5min.

10. A multifunctional rainproof cloth, characterized in that: The multifunctional rainproof cloth is prepared by using the preparation method of the multifunctional rainproof cloth according to any one of claims 1 to 9.

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