A shading and heat-insulating curtain fabric and a preparation process thereof

Abstract

This application relates to the field of textile fabric technology, and in particular to a specific disclosure of a light-blocking and heat-insulating curtain fabric and its preparation process; a light-blocking and heat-insulating curtain fabric includes a base fabric, a light-blocking layer and an outer layer, wherein the light-blocking layer includes a light-blocking nano-black film, the surface of which is coated with a light-blocking coating, and the light-blocking nano-black film includes the following raw materials in parts by weight: 40-50 parts of polyethylene terephthalate, 1-3 parts of polyethylene wax, 1-3 parts of antioxidant, 3-5 parts of carbon black, and 10-20 parts of nanoparticles; this application, through multiple composite structures and the synergistic effect of various components, can effectively improve the durability of the fabric's light-blocking and heat-dissipation performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile fabrics, in particular to a light-shielding and heat-insulating curtain fabric and a preparation process thereof. BACKGROUND

[0002] With the increasing demand for energy saving of modern buildings and the continuous improvement of people's requirements for indoor environmental comfort, curtains, as an essential part of home decoration, have expanded their functions from traditional decoration and privacy protection to light and heat environment regulation. As a typical representative of functional textiles, light-shielding and heat-insulating curtains need to meet multiple requirements such as high-efficiency light-shielding, heat-blocking, lightweight, and aesthetic appearance. Such curtains not only reduce air conditioning energy consumption in summer and heat loss in winter, but also improve indoor visual comfort by controlling light fibers.

[0003] At present, the common light-shielding and heat-insulating curtain fabric on the market mainly coats a light-shielding coating on the surface of the fabric, and blocks the penetration of light through the color and material of the coating. This method can achieve light-shielding effect to a certain extent, but the coating is easy to fall off, affecting the durability of light-shielding performance. SUMMARY

[0004] In order to improve the shortcomings of the existing light-shielding curtain fabric, the present application provides a light-shielding and heat-insulating curtain fabric and a preparation process thereof.

[0005] In the first aspect, the present application provides a light-shielding and heat-insulating curtain fabric, which adopts the following technical solution: A light-shielding and heat-insulating curtain fabric, comprising a base cloth, a light-shielding layer and an outer layer, the light-shielding layer comprises a light-shielding nano black film, the surface of the light-shielding nano black film is coated with a light-shielding paint, and the light-shielding nano black film comprises the following raw materials in parts by weight: polyethylene terephthalate 40-50 parts, polyethylene wax 1-3 parts, antioxidant 1-3 parts, carbon black 3-5 parts, and nano particles 10-20 parts.

[0006] By employing the above technical solutions, the light-shielding layer utilizes a dual function of light-shielding nano-black film and light-shielding coating. The light-shielding nano-black film absorbs and scatters light, effectively blocking most of the light and heat. The surface light-shielding coating fills any microscopic unevenness or defects on the film surface, forming a protective layer that enhances its wear resistance, scratch resistance, and improves the fabric's light-shielding durability. Adding polyethylene terephthalate (PET) as a matrix to the light-shielding nano-black film raw material improves the strength, heat resistance, and dimensional stability of the light-shielding layer, thereby enhancing the fabric's light-shielding durability. The porous structure, high light absorption coefficient, and low light reflectivity of carbon black provide excellent heat insulation within the light-shielding nano-black film. Simultaneously, the nanoparticles reflect infrared heat, enhancing both the light-shielding effect and the fabric's heat insulation performance. Polyethylene wax coats the particle surface, reducing the surface energy of the nanoparticles and carbon black, improving the compatibility of the nanoparticles, carbon black, and PET, and increasing the uniformity and density of the light-shielding layer.

[0007] Preferably, the nanoparticles are silicon dioxide and titanium dioxide.

[0008] Preferably, the light-shielding coating comprises the following raw materials in parts by weight: 20-30 parts of polyurethane acrylate emulsion, 3-5 parts of matting agent, 0.5-1 part of thickener, 5-8 parts of vacuum ceramic microspheres, and 0.5-1 part of film-forming aid.

[0009] By adopting the above technical solution, adding an appropriate amount of vacuum ceramic microspheres to the light-blocking coating, the internal cavity can improve the thermal conductivity of the fabric. Using polyurethane acrylate emulsion as the matrix of the light-blocking coating, the combination of polyurethane and acrylate segments ensures that the coating adheres firmly to the nano-black film, preventing it from easily peeling off. This promotes high weather resistance and light aging resistance of the coating, improving the durability of the fabric's light-blocking properties.

[0010] Preferably, the polyurethane acrylate emulsion comprises the following raw materials in parts by weight: 5-8 parts propyl methacrylate, 20-30 parts isocyanate, 10-20 parts polyester polyol, 3-5 parts polyether diol sulfonate, 20-30 parts acrylic monomer, 0.5-1 part catalyst, and 3-5 parts n-butanol.

[0011] By adopting the above technical solution, polyether diol sulfonate and acrylic monomers are added to the polyurethane prepolymer raw material synthesized from isocyanate and polyester polyol. This introduces hydrophilic groups, and the acrylic segments interpenetrate with the polyurethane network, forming a stable hybrid emulsion. Propylene methacrylate can enhance the crosslinking density of the acrylic monomer and polyurethane, thereby enabling the light-blocking coating to possess both good adhesion and weather resistance.

[0012] Preferably, the acrylic monomer is n-butyl acrylate, acrylic acid and hydroxyethyl acrylate, and the mass ratio of n-butyl acrylate, acrylic acid and hydroxyethyl acrylate is 2:(1.5-2):(1-1.5).

[0013] Preferably, the preparation method of the polyurethane acrylate emulsion includes the following specific steps: mixing isocyanate, polyester polyol, and polyether diol sulfonate, heating and reacting, then adding n-butanol and propyl methacrylate dropwise, then adding acrylic monomer and catalyst and mixing, and heating and reacting to obtain the polyurethane acrylate emulsion.

[0014] Preferably, the heating reaction temperature is 80-90℃, and the temperature rise reaction temperature is 75-85℃.

[0015] Preferably, the outer layer has a thickness of 10-20 μm, and the light-shielding layer has a thickness of 5-10 μm.

[0016] Secondly, this application provides a manufacturing process for a light-blocking and heat-insulating curtain fabric, employing the following technical solution: A process for preparing a light-blocking and heat-insulating curtain fabric involves mixing polyethylene terephthalate, polyethylene wax, antioxidants, carbon black, and nanoparticles, then melting and extruding the mixture onto the surface of a base fabric layer to form a light-blocking layer. A light-blocking coating is then applied to the surface of the light-blocking layer, and finally, the fabric is bonded to the outer layer with a hot melt adhesive to obtain the light-blocking and heat-insulating curtain fabric.

[0017] By adopting the above technical solution and through the multi-layer composite structure, the synergistic effect of each component can effectively block light transmission and heat conduction, resulting in fabrics with good light-blocking and heat-insulating effects.

[0018] Preferably, the melt extrusion temperature is 180-200℃.

[0019] In summary, this application has the following beneficial effects: 1. This application employs a dual-action approach of a light-blocking nano-black film and a light-blocking coating on the light-blocking layer. The light-blocking nano-black film absorbs and scatters light, effectively blocking most of the light and heat. The surface light-blocking coating enhances the fabric's durability in blocking light. Polyethylene terephthalate serves as the matrix of the light-blocking film. Carbon black and nanoparticles improve the fabric's heat insulation effect. Finally, polyethylene wax enhances the uniformity and density of the light-blocking film system.

[0020] 2. In this application, the polyurethane prepolymer raw material synthesized from isocyanate and polyester polyol contains polyether diol sulfonate and acrylic monomer. The acrylic segments interpenetrate with the polyurethane network to form a stable hybrid emulsion. The combination of polyurethane and acrylate segments ensures that the coating adheres firmly to the nano-black film, preventing it from easily peeling off. This promotes higher weather resistance and light aging resistance in the coating, improving the durability of the fabric's light-blocking properties. Detailed Implementation

[0021] The present application will be further described in detail below with reference to the embodiments.

[0022] All raw materials used in the examples are commercially available. Example Example 1

[0023] This embodiment provides a light-blocking and heat-insulating curtain fabric, including a base fabric, a light-blocking layer and an outer layer. The base fabric is a cotton-linen blend fabric with a thickness of 10μm; the outer layer fabric is a polyester spring spun fabric with a thickness of 10μm; the light-blocking layer includes a light-blocking nano black film, and the surface of the light-blocking nano black film is coated with a light-blocking coating.

[0024] The light-shielding nano-black film comprises the following raw materials in parts by weight: 45 kg of polyethylene terephthalate, 2 kg of polyethylene wax, 2 kg of antioxidant, 4 kg of carbon black, and 15 kg of nanoparticles. The polyethylene terephthalate has a number-average molecular weight of 20,000, the polyethylene wax has a relative molecular mass of 2,000, the antioxidant is antioxidant 1010, the carbon black has a particle size of 50 nm, and the nanoparticles are a mixture of silicon dioxide and titanium dioxide in a 1:1 mass ratio, with a particle size of 50 nm.

[0025] The light-blocking coating comprises the following raw materials in parts by weight: 25 kg of polyurethane acrylate emulsion, 4 kg of matting agent, 0.8 kg of thickener, 7 kg of vacuum ceramic microspheres, and 0.8 kg of film-forming aid. The matting agent selected is Grace ED-30 matting agent, the thickener is hydroxyethyl cellulose, the particle size of the vacuum ceramic microspheres is 5 μm, and the film-forming aid is dipropylene glycol methyl ether.

[0026] The polyurethane acrylate emulsion comprises the following raw materials in parts by weight: 7 kg propyl methacrylate, 25 kg isocyanate, 15 kg polyester polyol, 4 kg polyether diol sulfonate, 25 kg acrylic monomer, 0.8 kg catalyst, and 4 kg n-butanol. The isocyanate is isophorone diisocyanate, the polyester polyol is polypentyl adipate neopentyl glycol, and the catalyst is ammonium persulfate. The acrylic monomers are n-butyl acrylate, acrylic acid, and hydroxyethyl acrylate, with a mass ratio of n-butyl acrylate, acrylic acid, and hydroxyethyl acrylate of 2:1.5:1.5.

[0027] The manufacturing process of blackout and heat-insulating curtain fabric includes the following specific steps: S1: Isocyanate, polyester polyol and polyether diol sulfonate are mixed and heated to 85°C for reaction. Then n-butanol and propyl methacrylate are added dropwise. Acrylic monomer and catalyst are added and mixed. The mixture is reacted at 80°C for 2 hours to obtain polyurethane acrylic emulsion.

[0028] S2: Mix polyurethane acrylate emulsion, matting powder, thickener, vacuum ceramic microspheres and film-forming aid evenly to form a light-blocking coating.

[0029] S3: Polyethylene terephthalate, polyethylene wax, antioxidant, carbon black, and nanoparticles are mixed and melt-extruded onto the surface of the base fabric at 190°C to form a light-blocking layer with a thickness of 8μm. Then, a light-blocking coating is applied to the surface of the light-blocking layer, and after curing, a coating with a thickness of 0.5μm is formed. Finally, the surface of the light-blocking layer is bonded to the outer layer with hot melt adhesive to obtain a light-blocking and heat-insulating curtain fabric.

[0030] Example 2 The difference between Example 2 and Example 1 is that the light-shielding nano black film includes the following raw materials in parts by weight: 40 kg of polyethylene terephthalate, 1 kg of polyethylene wax, 3 kg of antioxidant, 3 kg of carbon black, and 10 kg of nanoparticles.

[0031] Example 3 The difference between Example 3 and Example 1 is that the light-shielding nano black film includes the following raw materials in parts by weight: 50 kg of polyethylene terephthalate, 3 kg of polyethylene wax, 1 kg of antioxidant, 5 kg of carbon black, and 20 kg of nanoparticles.

[0032] Example 4 The difference between Example 4 and Example 1 is that the light-blocking coating includes the following raw materials in parts by weight: 20 kg of polyurethane acrylate emulsion, 5 kg of matting powder, 0.5 kg of thickener, 5 kg of vacuum ceramic microspheres, and 0.5 kg of film-forming aid.

[0033] Example 5 The difference between Example 5 and Example 1 is that the light-blocking coating includes the following raw materials in parts by weight: 30 kg of polyurethane acrylate emulsion, 3 kg of matting powder, 1 kg of thickener, 8 kg of vacuum ceramic microspheres, and 1 kg of film-forming aid.

[0034] Example 6 The difference between Example 6 and Example 1 is that the polyurethane acrylate emulsion includes the following raw materials in parts by weight: 5 kg of propyl methacrylate, 30 kg of isocyanate, 20 kg of polyester polyol, 3 kg of polyether diol sulfonate, 20 kg of acrylic monomer, 0.5 kg of catalyst, and 3 kg of n-butanol.

[0035] Example 7 The difference between Example 7 and Example 1 is that the polyurethane acrylate emulsion includes the following raw materials in parts by weight: 8 kg of propyl methacrylate, 20 kg of isocyanate, 10 kg of polyester polyol, 5 kg of polyether diol sulfonate, 30 kg of acrylic monomer, 1 kg of catalyst, and 5 kg of n-butanol.

[0036] Example 8 The difference between Example 8 and Example 1 is that the mass ratio of n-butyl acrylate, acrylic acid and hydroxyethyl acrylate in the polyurethane acrylate emulsion raw material is 2:2:1.

[0037] Example 9 The difference between Example 9 and Example 1 is that acrylic emulsion is used instead of polyurethane acrylic emulsion in the raw materials of the light-shielding coating, and the viscosity of the acrylic emulsion is 500 mPa·s.

[0038] The manufacturing process of blackout and heat-insulating curtain fabric includes the following specific steps: S1: Mix acrylic emulsion, matting powder, thickener, vacuum ceramic microspheres and film-forming aid evenly to form a light-blocking coating.

[0039] S2: Polyethylene terephthalate, polyethylene wax, antioxidant, carbon black, and nanoparticles are mixed and melt-extruded onto the surface of the base fabric at 190°C to form a light-blocking layer with a thickness of 8μm. Then, a light-blocking coating is applied to the surface of the light-blocking layer, and after curing, a coating with a thickness of 0.5μm is formed. Finally, the surface of the light-blocking layer is bonded to the outer layer with hot melt adhesive to obtain a light-blocking and heat-insulating curtain fabric.

[0040] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that polyethylene wax is not used in the raw material of the light-shielding nano black film.

[0041] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that the surface of the light-shielding nano black film is not coated with a light-shielding coating.

[0042] The manufacturing process of blackout and heat-insulating curtain fabric includes the following specific steps: S1: Isocyanate, polyester polyol and polyether diol sulfonate are mixed and heated to 85°C for reaction. Then n-butanol and propyl methacrylate are added dropwise. Acrylic monomer and catalyst are added and mixed. The mixture is reacted at 80°C for 2 hours to obtain polyurethane acrylic emulsion.

[0043] S3: Polyethylene terephthalate, polyethylene wax, antioxidant, carbon black and nanoparticles are mixed and melt-extruded onto the surface of the base fabric at 190°C to form a light-blocking layer with a thickness of 8μm. The light-blocking layer is then bonded to the outer layer with hot melt adhesive to obtain a light-blocking and heat-insulating curtain fabric.

[0044] Performance testing The light-blocking and heat-insulating curtain fabrics provided in Examples 1-9 and Comparative Examples 1-2 of this application were subjected to the following performance tests, and the specific test results are shown in Table 1.

[0045] Detection methods I. Shading rate Referring to the standard T / CTES1012-2018 "Test Method for Light-Shielding Performance of Textiles and Related Materials - Illuminometer Method", the light-shielding rate of the light-shielding and heat-insulating curtain fabric prepared in this application was tested, as well as the light-shielding rate after placing the sample under 5% humidity for 24 hours and then under 75°C for 12 hours.

[0046] II. Thermal Insulation Performance The thermal conductivity of the blackout and heat-insulating curtain fabric prepared in this application was tested in accordance with the standard GB / T35762-2017 "Test Methods for Heat Transfer Properties of Textiles".

[0047] Table 1: Performance Test Results Data Table

[0048] The performance test results show that, through the synergistic effect of each component, this application can maintain a relatively stable light-blocking and heat-insulating effect. A comparison between Comparative Examples 1-2 and Example 1 reveals that Comparative Example 1 changed the raw material composition of the light-blocking nano-black film, while Comparative Example 2 used a single light-blocking nano-black film without coating. The performance test results show that the light-blocking and heat-insulating effects of the prepared fabric both decreased. This further demonstrates that this application, through its composite structure and the synergistic effect of each component, can improve the durability and stability of the fabric's light-blocking effect.

[0049] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A light-blocking and heat-insulating curtain fabric, characterized in that, It includes a base fabric, a light-shielding layer, and an outer layer. The light-shielding layer includes a light-shielding nano-black film. The surface of the light-shielding nano-black film is coated with a light-shielding paint. The light-shielding nano-black film includes the following raw materials in parts by weight: 40-50 parts of polyethylene terephthalate, 1-3 parts of polyethylene wax, 1-3 parts of antioxidant, 3-5 parts of carbon black, and 10-20 parts of nanoparticles.

2. The blackout and heat-insulating curtain fabric according to claim 1, characterized in that, The nanoparticles are silicon dioxide and titanium dioxide.

3. The blackout and heat-insulating curtain fabric according to claim 1, characterized in that, The light-shielding coating comprises the following raw materials in parts by weight: 20-30 parts polyurethane acrylate emulsion, 3-5 parts matting agent, 0.5-1 part thickener, 5-8 parts vacuum ceramic microspheres, and 0.5-1 part film-forming aid.

4. The blackout and heat-insulating curtain fabric according to claim 3, characterized in that, The polyurethane acrylate emulsion comprises the following raw materials in parts by weight: 5-8 parts propyl methacrylate, 20-30 parts isocyanate, 10-20 parts polyester polyol, 3-5 parts polyether diol sulfonate, 20-30 parts acrylic monomer, 0.5-1 part catalyst, and 3-5 parts n-butanol.

5. The blackout and heat-insulating curtain fabric according to claim 4, characterized in that, The acrylic monomers are n-butyl acrylate, acrylic acid, and hydroxyethyl acrylate, and the mass ratio of n-butyl acrylate, acrylic acid, and hydroxyethyl acrylate is 2:(1.5-2):(1-1.5).

6. The blackout and heat-insulating curtain fabric according to claim 4, characterized in that, The preparation method of the polyurethane acrylate emulsion includes the following specific steps: mixing isocyanate, polyester polyol and polyether diol sulfonate, heating and reacting, then adding n-butanol and propyl methacrylate dropwise, then adding acrylic monomer and catalyst and mixing, and heating and reacting to obtain polyurethane acrylate emulsion.

7. The blackout and heat-insulating curtain fabric according to claim 4, characterized in that, The heating reaction temperature is 80-90℃, and the temperature rise reaction temperature is 75-85℃.

8. The blackout and heat-insulating curtain fabric according to claim 1, characterized in that, The outer layer has a thickness of 10-20 μm, and the light-shielding layer has a thickness of 5-10 μm.

9. A manufacturing process for a blackout and heat-insulating curtain fabric as described in any one of claims 1-8, characterized in that, The specific steps include: mixing polyethylene terephthalate, polyethylene wax, antioxidants, carbon black, and nanoparticles, then melting and extruding the mixture onto the surface of the base fabric layer to form a light-blocking layer. Next, a light-blocking coating is applied to the surface of the light-blocking layer, and finally, it is bonded to the outer layer with hot melt adhesive to obtain a light-blocking and heat-insulating curtain fabric.

10. The manufacturing process of the blackout and heat-insulating curtain fabric according to claim 9, characterized in that, The melt extrusion temperature is 180-200℃.

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