A kind of velvet sofa technology fabric and preparation method thereof

Abstract

This invention discloses a velvety sofa fabric and its preparation method, belonging to the field of textile fabric processing technology. This invention provides a hollow orange-petal-shaped microfiber nonwoven fabric as the base material, and a waterborne polyurethane (WPU) film as the polymer coating. Hollow orange-petal-shaped microfiber / waterborne polyurethane (PET-PA6 / WPU) synthetic leather is obtained through dry film transfer technology, achieving the green preparation of microfiber leather. Fluoropolymers, due to their low surface free energy, high chemical and thermal stability, excellent adhesion and water and oil repellency, self-cleaning properties, low refractive index, and low dielectric constant, are widely used in construction, functional coatings, electronic devices, the automotive industry, and fabric finishing. Using this finishing agent gives the sofa fabric water, oil, and stain repellency.

Description

Technical Field

[0001] This invention relates to a velvety sofa fabric and its preparation method, belonging to the field of textile fabric processing technology. Background Technology

[0002] Traditional sofa fabrics are generally divided into upholstered sofas and leather sofas. Upholstered sofas are removable and washable, and have good breathability, but they are prone to getting dirty and showing signs of wear easily. Leather sofas have a good feel and are durable, but they are expensive and require maintenance. As people's living standards improve, simple upholstered and leather sofas can no longer meet their needs, hence the emergence of engineered fabric sofas. Engineered fabric sofas have a clean appearance and are very sturdy and durable. Their appearance and texture resemble genuine leather, possessing the texture and color of genuine leather, while also having the good breathability of upholstered sofas. However, the surface fabric of engineered fabric sofas gets dirty easily and is not easy to maintain. After repeated washing, the fabric color will change, giving it a worn look.

[0003] Traditional velvet sofa fabrics are flocked fabrics, with various types of cloth as the base fabric. Nylon or viscose pile is flocked onto the front of the base fabric, and then further processed to create a rich, soft, brightly colored, and uniquely styled surface. However, it requires careful selection of the pile material, and the adhesive used in flocking must be easy to apply, environmentally friendly, and have appropriate viscosity. Velvet sofa fabrics, on the other hand, focus on the raw materials. They use a blend of leather-filled fibers, giving them a leather-like feel while also providing excellent abrasion resistance. While velvet sofas typically require disassembly for cleaning if stained with oil or other stubborn stains, after undergoing water-, oil-, and stain-repellent treatment, they only need to be wiped clean without extensive washing.

[0004] Chinese patent CN107090720A discloses a single-sided fleece composite dry-applied polyurethane sofa fabric. The method involves coating a dry-process film layer with polyurethane adhesive, bonding the polyurethane surface film to a base fabric to obtain the dry-applied polyurethane sofa fabric, and then applying glue to the dry-applied polyurethane sofa fabric and attaching single-sided fleece to obtain sofa leather fabric. This type of product uses adhesives, resulting in a cumbersome processing procedure and poor environmental performance.

[0005] Chinese patent CN217395916U discloses a bamboo-textured velvet-feel composite sofa fabric, comprising a fabric body, a woven backing layer, a breathable layer, and a soft layer. A bamboo-textured velvet-feel outer fabric layer is connected to the top of the inner fabric body, and a woven backing layer is connected to the bottom of the inner fabric body. A reinforcing inner fabric layer is connected to the bottom of both the bamboo-textured velvet-feel outer fabric layer and the top of the woven backing layer. While such products offer a rich appearance, their numerous layers make them prone to getting dirty and difficult to clean.

[0006] In conclusion, it is essential to develop an environmentally friendly, water-, oil-, and stain-resistant plush sofa fabric. Summary of the Invention

[0007] To address at least one of the aforementioned problems, this invention provides a method for preparing a velvet-feel sofa fabric. This invention provides a velvet-feel sofa fabric that possesses advantages such as water, oil, and stain repellency, excellent hand feel and softness, and closely resembles genuine leather in both appearance and texture. Furthermore, the entire production process is green and environmentally friendly.

[0008] The first objective of this invention is to provide a method for preparing a plush-feel sofa fabric, comprising the following steps:

[0009] (1) Preparation of PET-PA6 hollow orange petal-shaped ultrafine fiber nonwoven fabric;

[0010] (2) Preparation of waterborne polyurethane (WPU) membrane;

[0011] (3) Preparation of PET-PA6 / WPU microfiber leather;

[0012] (4) Water-, oil-, and stain-resistant finishing:

[0013] The monomer oil phase containing modified nano-SiO2, SMA, HEA, G06C, and HD was dispersed and added to 300ml of deionized water system and stirred evenly to form a mixture. The mixture was then ultrasonically dispersed to prepare an emulsion. The prepared emulsion was diluted and applied to the fabric, which was then pre-dried and baked at high temperature to obtain the finished fabric. The modified nano-SiO2 was 0.4-0.5g, SMA was 1.5-1.7g, HEA was 1.4-1.8g, G06C was 6.3-7.1g, and HD was 1.2-1.5g. The temperature was increased to 70℃ by rotating a speed.

[0014] In one embodiment, in step (1), the preparation of PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric specifically involves conveying, drying, extruding and melting PET and PA6 chips through a screw extruder, filtering them through a filter, metering them with a metering pump, and then feeding them into a spinning box. The chips are then spun out through a spinneret (16 hollow orange-petal-shaped chips: 8+8 type), cooled by side blowing, and drawn at high speed by a tubular drafter. The fibers are then evenly laid on a web forming machine to form a fiber web. After pre-humidification, the fiber web enters the hydroentangling zone, where the fibers open and entangle together under the action of high-pressure water flow. Finally, the wet fiber web is dried, trimmed, and wound into a roll to obtain PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric.

[0015] In one embodiment, the metering pump dispenses a quantity of PET:PA6 at a mass ratio of 70:30, the spinning box temperature is 280-300℃, the side-blowing cooling temperature is 10-15℃, the high-pressure water jet energy is 5500-5800kJ / kg, and the areal density of the hollow orange-petal-shaped microfiber nonwoven fabric is 75-85g / m2, with a thickness of 0.40-0.45mm.

[0016] In one embodiment, in step (2), the preparation of the waterborne polyurethane (WPU) film specifically involves first mixing WPU, foaming agent Hr, foam stabilizing agent Ht, leveling agent, and thickener in 250ml of water, then stirring the mixed slurry at room temperature to the foaming ratio, and finally scraping it into a film layer of a certain thickness on a glass plate at room temperature with a scraper, and then quickly drying it under a certain temperature condition, and converting it into a WPU film at a constant temperature.

[0017] In one embodiment, the WPU has a mass of 90-95g, a foaming agent of 1.8-2.2g, a foam stabilizing agent of 1.8-2.2g, a leveling agent of 1.4-1.6g, a thickener of 1.4-1.6g, a foaming ratio of 100-350%, a film thickness of 0.2-0.4mm, and a drying temperature of 80-100℃.

[0018] In one embodiment, the preparation of PET-PA6 / WPU microfiber leather in step (3) specifically involves first mixing WPU, foaming agent Hr, foam stabilizing agent Ht, leveling agent, and thickener in 250ml of water to foam to a certain foaming ratio, then scraping the slurry with a certain foaming ratio onto release paper to form a film layer of a certain thickness and drying it, then scraping the slurry with a high foaming ratio onto the surface of the film layer and the surface of the PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric to form film layers of different thicknesses and drying them to semi-dry, and finally laminating the release paper composite film onto the side of the nonwoven fabric with the film layer, and then drying it under a certain temperature for later use.

[0019] In one embodiment, the WPU has a mass of 90-95g, foaming agent 1.8-2.2g, foam stabilizing agent 1.8-2.2g, leveling agent 1.4-1.6g, thickener 1.4-1.6g, foaming ratio of 90-100% and 240%-250%, film thickness of 0.1-0.3mm, and drying temperature of 80-100℃.

[0020] In one embodiment, the finishing step in step (4) specifically involves dissolving sodium dodecyl sulfate and octylphenol polyoxyethylene ether in 300 ml of deionized water and stirring at room temperature; then dispersing the monomer oil phase containing modified nano-SiO2, SMA (octadecyl methacrylate), BA (butyl acrylate), MMA (methyl methacrylate), HEA (hydroxyethyl acrylate), G06C (tridecyl fluorooctyl acrylate), and HD (n-hexadecane) and adding it to the above emulsion system and stirring evenly to form a mixture; finally, transferring the mixture to an ultrasonic cell pulverizer for ultrasonic dispersion to form a monomer pre-emulsion; mixing the pre-emulsion with a small amount of ammonium persulfate initiator aqueous solution and heating it to a certain temperature while maintaining a stable rotation speed; when blue light is observed in the emulsion system, adding the remaining pre-emulsion and initiator aqueous solution at a constant speed, continuing to keep it warm for a period of time, cooling it to room temperature, and filtering it out; diluting the prepared emulsion with a certain concentration using deionized water, and then finishing it onto the fabric through a secondary padding process, followed by pre-drying and high-temperature baking to obtain the finished fabric.

[0021] The second objective of this invention is to provide a velvety sofa fabric.

[0022] In one embodiment, the plush sofa fabric comprises PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric and a water-based polyurethane coating.

[0023] Advantages and effects of the present invention:

[0024] (1) The present invention uses spunbond hydroentangled nonwoven processing technology to prepare a three-dimensional network structure of polyester-polyamide 6 (PET-PA6) hollow orange petal-shaped ultrafine fiber nonwoven fabric. The cross section of the single fiber after splitting is polygonal, and the fiber diameter is between 2.2 and 5.5 μm.

[0025] (2) This invention obtains a velvet sofa technical fabric with good air permeability and excellent mechanical properties by performing water-repellent, oil-repellent and stain-repellent finishing on the velvet sofa fabric and screening and optimizing the raw material components of the finishing agent. The air permeability can reach more than 80%, and the breaking strength in the warp and weft directions can reach more than 475N and 341N, respectively, which meets the requirements for use of non-woven base fabric for synthetic leather textiles.

[0026] (3) This invention uses PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric as the base fabric and WPU film as the polymer coating. Hollow orange-petal-shaped PET-PA6 / WPU synthetic leather was obtained through dry film transfer technology, which realizes the functions of oil repellency, water repellency and stain repellency, realizes the green preparation of microfiber leather, and has broad market application prospects. Detailed Implementation

[0027] Test plan:

[0028] 1. Breathability

[0029] The test was conducted according to GB / T 5453-1997 "Determination of air permeability of textile fabrics" using a YG461E digital air permeability meter with a nozzle diameter of 4 mm.

[0030] 2. Mechanical properties

[0031] Physical and mechanical properties are important parameters for practical textiles. Therefore, the moisture permeability, air permeability, breaking strength and wrinkle recovery angle of cotton fabrics before and after finishing were tested.

[0032] 3. Repels water, oil, and dirt.

[0033] (1) Water repellency: The contact angle of water and oil (salad oil) on the fabric is measured. The average value is taken as the final result after 5 tests at different positions on the fabric.

[0034] (2) Oil repellency: According to AATCC 118-2002 "Oil repellency: Resistance test of hydrocarbons", the treated fabric is tested by dropping liquids with different surface tensions onto the fabric surface. The highest level of liquid that does not wet the fabric within 30 seconds is the oil repellency level of the fabric.

[0035] (3) Stain Repellency: Liquid Droplet Test: The liquid droplet test is used to evaluate the resistance of a fabric surface to penetration by different liquid droplets. Different types of liquids (such as water, oil, beverages, etc.) are dropped onto the fabric surface, and the penetration of the droplets and the residence time of the droplets on the fabric surface are observed to evaluate the stain repellency of the fabric.

[0036] Example 1:

[0037] (1) Preparation of PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric:

[0038] PET and PA6 chips are separately conveyed, dried, extruded and melted by a screw extruder, filtered, and metered by a metering pump before being fed into a spinning box (280℃). The chips are then extruded through a spinneret (16 hollow orange-petal type: 8+8 type), cooled by side blowing (15℃), and drawn at high speed by a tubular drafter. The fibers are then evenly laid on a web forming machine to form a fiber web. After pre-humidification, the fiber web enters the hydroentangling zone, where the fibers open and entangle under the action of high-pressure water flow (water jet energy: 5600kJ / kg). Finally, the wet fiber web is dried, trimmed, and wound into rolls to obtain PET-PA6 hollow orange-petal type ultrafine fiber nonwoven fabric.

[0039] (2) Preparation of waterborne polyurethane (WPU) membrane:

[0040] First, mix 93g WPU, 2g foaming agent Hr, 2g foam stabilizing agent Ht, 1.5g leveling agent, and 1.5g thickener in 250ml of water. Then, stir the mixture at room temperature until the foaming ratios are 100%, 150%, and 200%, respectively. Finally, use a scraper to scrape the mixture onto a glass plate at room temperature to form a film of a certain thickness (0.3mm). Then, quickly place the film into an oven at 80℃ to dry it and convert it into a WPU film at a constant temperature.

[0041] (3) Preparation of PET-PA6 / WPU microfiber leather:

[0042] First, mix 93g WPU, 2g foaming agent Hr, 2g foam stabilizing agent Ht, 1.5g leveling agent, and 1.5g thickener in 250mL of water and foam to 100% and 250% respectively. Then, scrape the slurry with a foaming ratio of 100% onto the release paper to form a 0.2mm film layer and dry it. Scrape the slurry with a foaming ratio of 250% onto the surface of the film layer and the surface of the PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric to form 0.3mm and 0.1mm film layers respectively and dry them to semi-dry. Finally, laminate the release paper composite film onto the nonwoven fabric with the film layer and then dry it in an oven at 80℃ for later use.

[0043] (4) Water-, oil-, and stain-resistant finishing:

[0044] Sodium dodecyl sulfate and octylphenol polyoxyethylene ether were dissolved in 300 mL of deionized water and stirred at room temperature. A monomer oil phase containing 0.45 g modified nano-SiO2, 1.6 g SMA, 1.6 g HEA, 6.8 g G06C, and 1.3 g HD was dispersed and added to the emulsion system and stirred until homogeneous to form a mixture. The mixture was then transferred to an ultrasonic cell disruptor for ultrasonic dispersion to form a monomer pre-emulsion. The pre-emulsion was mixed with a small amount of ammonium persulfate initiator aqueous solution and heated to 70°C while maintaining a stable rotation speed. When blue light was observed in the emulsion system, the remaining pre-emulsion and initiator aqueous solution were added dropwise at a constant rate. After maintaining the temperature for a period of time, the mixture was cooled to room temperature and filtered. The prepared emulsion was diluted with deionized water to a certain concentration, and then applied to the fabric through a secondary padding process. Pre-drying and high-temperature baking were then performed to obtain the finished plush sofa fabric.

[0045] Example 2:

[0046] (1) Preparation of PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric:

[0047] PET and PA6 chips are separately conveyed, dried, extruded and melted by a screw extruder, filtered, and metered by a metering pump before being fed into a spinning box (290℃). The chips are then extruded through a spinneret (16 hollow orange-petal type: 8+8 type), cooled by side-blowing air (10℃), and drawn at high speed by a tubular drafter. The fibers are then evenly laid on a web forming machine to form a fiber web. After pre-humidification, the fiber web enters the hydroentangling zone, where the fibers open and entangle under the action of high-pressure water (water jet energy: 5500kJ / kg). Finally, the wet fiber web is dried, trimmed, and wound into rolls to obtain PET-PA6 hollow orange-petal type ultrafine fiber nonwoven fabric.

[0048] (2) Preparation of waterborne polyurethane (WPU) membrane:

[0049] First, mix 90g WPU, 1.8g foaming agent Hr, 1.8g foam stabilizing agent Ht, 1.4g leveling agent, and 1.4g thickener in 250ml of water. Then, stir the mixture at room temperature until the foaming ratios are 150%, 200%, and 250%, respectively. Finally, use a scraper to scrape the mixture onto a glass plate at room temperature to form a film of a certain thickness (0.2mm). Then, quickly place the film into an oven at 90℃ to dry it and convert it into a WPU film at a constant temperature.

[0050] (3) Preparation of PET-PA6 / WPU microfiber leather:

[0051] First, mix 90g WPU, 1.8g foaming agent Hr, 1.8g foam stabilizing agent Ht, 1.4g leveling agent, and 1.4g thickener in 250mL of water and foam to 90% and 240% respectively. Then, scrape the slurry with a foaming ratio of 90% onto the release paper to form a 0.1mm film layer and dry it. Scrape the slurry with a foaming ratio of 240% onto the surface of the film layer and the surface of the PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric to form 0.2mm and 0.1mm film layers respectively and dry them to semi-dry. Finally, laminate the release paper composite film onto the nonwoven fabric with the film layer and then dry it in an oven at 80℃ for later use.

[0052] (4) Water-, oil-, and stain-resistant finishing:

[0053] Sodium dodecyl sulfate and octylphenol polyoxyethylene ether were dissolved in 300 mL of deionized water and stirred at room temperature. A monomer oil phase containing 0.4 g modified nano-SiO2, 1.7 g SMA, 1.7 g HEA, 7.0 g G06C, and 1.5 g HD was dispersed and added to the emulsion system and stirred until homogeneous to form a mixture. The mixture was then transferred to an ultrasonic cell disruptor for ultrasonic dispersion to form a monomer pre-emulsion. The pre-emulsion was mixed with a small amount of ammonium persulfate initiator aqueous solution and heated to 70°C while maintaining a stable rotation speed. When blue light was observed in the emulsion system, the remaining pre-emulsion and initiator aqueous solution were added dropwise at a constant rate. After maintaining the temperature for a period of time, the mixture was cooled to room temperature and filtered. The prepared emulsion was diluted with deionized water to a certain concentration, and then applied to the fabric through a secondary padding process. Pre-drying and high-temperature baking were then performed to obtain the finished plush sofa fabric.

[0054] Example 3:

[0055] (1) Preparation of PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric:

[0056] PET and PA6 chips are separately conveyed, dried, extruded and melted by a screw extruder, filtered, and metered by a metering pump before being fed into a spinning box (300℃). The chips are then extruded through a spinneret (16 hollow orange-petal type: 8+8 type), cooled by side-blowing air (15℃), and drawn at high speed by a tubular drafter. The fibers are then evenly laid on a web forming machine to form a fiber web. After pre-humidification, the fiber web enters the hydroentangling zone, where the fibers open and entangle under the action of high-pressure water (water jet energy: 5700kJ / kg). Finally, the wet fiber web is dried, trimmed, and wound into rolls to obtain PET-PA6 hollow orange-petal type ultrafine fiber nonwoven fabric.

[0057] (2) Preparation of waterborne polyurethane (WPU) membrane:

[0058] First, mix 95g WPU, 2.2g foaming agent Hr, 2.2g foam stabilizing agent Ht, 1.6g leveling agent, and 1.6g thickener in 250ml of water. Then, stir the mixture at room temperature until the foaming ratios are 250%, 300%, and 350%, respectively. Finally, use a scraper to scrape the mixture onto a glass plate at room temperature to form a film of a certain thickness (0.3mm). Then, quickly place the film into an oven at 100℃ to dry it and convert it into a WPU film at a constant temperature.

[0059] (3) Preparation of PET-PA6 / WPU microfiber leather:

[0060] First, mix 95g WPU, 2.2g foaming agent Hr, 2.2g foam stabilizing agent Ht, 1.6g leveling agent, and 1.6g thickener in 250ml of water and foam to 100% and 250% respectively. Then, scrape the slurry with a foaming ratio of 100% onto the release paper to form a 0.2mm film layer and dry it. Scrape the slurry with a foaming ratio of 250% onto the surface of the film layer and the surface of the PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric to form 0.3mm and 0.1mm film layers respectively and dry them to semi-dry. Finally, laminate the release paper composite film onto the nonwoven fabric with the film layer and then dry it in an oven at 100℃ for later use.

[0061] (4) Water-, oil-, and stain-resistant finishing:

[0062] Sodium dodecyl sulfate and octylphenol polyoxyethylene ether were dissolved in 300 ml of deionized water and stirred at room temperature. A monomer oil phase containing 0.5 g modified nano-SiO2, 1.7 g SMA, 1.5 g HEA, 6.4 g G06C, and 1.5 g HD was dispersed and added to the emulsion system and stirred until homogeneous to form a mixture. The mixture was then transferred to an ultrasonic cell disruptor for ultrasonic dispersion to form a monomer pre-emulsion. The pre-emulsion was mixed with a small amount of ammonium persulfate initiator aqueous solution and heated to 70°C while maintaining a stable rotation speed. When blue light was observed in the emulsion system, the remaining pre-emulsion and initiator aqueous solution were added dropwise at a constant rate. After maintaining the temperature for a period of time, the mixture was cooled to room temperature and filtered. The prepared emulsion was diluted with deionized water to a certain concentration, and then applied to the fabric through a secondary padding process. Pre-drying and high-temperature baking were then performed to obtain the finished plush sofa fabric.

[0063] Example 4:

[0064] (1) Preparation of PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric:

[0065] PET and PA6 chips are separately conveyed, dried, melted by screw extruder, filtered, and metered by metering pump before being fed into a spinning box (285℃). They are then extruded through a spinneret (16 hollow orange-petal type: 8+8 type), cooled by side-blowing air (15℃), and drawn at high speed by a tubular drafter. The fibers are then evenly laid on a web forming machine to form a fiber web. After pre-humidification, the fiber web enters the hydroentangling zone, where the fibers open and entangle under high-pressure water flow (water jet energy: 5800kJ / kg). Finally, the wet fiber web is dried, trimmed, and wound into rolls to obtain PET-PA6 hollow orange-petal type ultrafine fiber nonwoven fabric.

[0066] (2) Preparation of waterborne polyurethane (WPU) membrane:

[0067] First, mix 94g WPU, 2.1g foaming agent Hr, 2.1g foam stabilizing agent Ht, 1.5g leveling agent, and 1.5g thickener in 250ml of water. Then, stir the mixture at room temperature until the foaming ratios are 250%, 300%, and 350%, respectively. Finally, use a scraper to scrape the mixture onto a glass plate at room temperature to form a film of a certain thickness (0.3mm). Then, quickly place the film into an oven at 90℃ to dry it and convert it into a WPU film at a constant temperature.

[0068] (3) Preparation of PET-PA6 / WPU microfiber leather:

[0069] First, mix 94g WPU, 2.1g foaming agent Hr, 2.1g foam stabilizing agent Ht, 1.5g leveling agent, and 1.5g thickener in 250ml of water and foam to 100% and 240% respectively. Then, scrape the slurry with a foaming ratio of 100% onto the release paper to form a 0.1mm film layer and dry it. Scrape the slurry with a foaming ratio of 240% onto the surface of the film layer and the surface of the PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric to form 0.2mm and 0.1mm film layers respectively and dry them to semi-dry. Finally, laminate the release paper composite film onto the nonwoven fabric with the film layer and then dry it in an oven at 90℃ for later use.

[0070] (4) Water-, oil-, and stain-resistant finishing:

[0071] Sodium dodecyl sulfate and octylphenol polyoxyethylene ether were dissolved in 300 ml of deionized water and stirred at room temperature. A monomer oil phase containing 0.4 g modified nano-SiO2, 1.6 g SMA, 1.4 g HEA, 6.3 g G06C, and 1.2 g HD was dispersed and added to the emulsion system and stirred until homogeneous to form a mixture. The mixture was then transferred to an ultrasonic cell disruptor for ultrasonic dispersion to form a monomer pre-emulsion. The pre-emulsion was mixed with a small amount of ammonium persulfate initiator aqueous solution and heated to 70°C while maintaining a stable rotation speed. When blue light was observed in the emulsion system, the remaining pre-emulsion and initiator aqueous solution were added dropwise at a constant rate. After maintaining the temperature for a period of time, the mixture was cooled to room temperature and filtered. The prepared emulsion was diluted with deionized water to a certain concentration, and then applied to the fabric through a secondary padding process. Pre-drying and high-temperature baking were then performed to obtain the finished plush sofa fabric.

[0072] Comparative Example 1:

[0073] Except for changing the materials added in step (4) to 0.45g modified nano-SiO2, 1.6g SMA, 3.2g BA, 2.6g MMA, 1.6g HEA, 6.8g G06C and 1.3g HD, the other steps are the same as in Example 1, and the velvet sofa fabric is prepared.

[0074] Comparative Example 2:

[0075] Except for changing the materials added in step (4) to 0.45g modified nano-SiO2, 1.6g SMA, 2.6g MMA, 1.6g HEA, 6.8g G06C and 1.3g HD, the other steps are the same as in Example 1, and the velvet sofa fabric is prepared.

[0076] Comparative Example 3:

[0077] Except for changing the materials added in step (4) to 0.45g modified nano-SiO2, 1.6g SMA, 3.2g BA, 1.6g HEA, 6.8g G06C and 1.3g HD, the other steps are the same as in Example 1, and the velvet sofa fabric is prepared.

[0078] The velvet-feel sofa fabrics prepared in Examples 1-4 and Comparative Examples 1-3 have a soft surface feel. Their breathability, mechanical properties, and water, oil, and stain repellency were evaluated, and the results are shown in Table 1. The velvet-feel sofa fabrics prepared in Examples 1-4 exhibit excellent breathability, mechanical properties, and water, oil, and stain repellency.

[0079] Table 1

[0080]

[0081] Example 1: The effect of the amount of modified nano-SiO2 added during water-repellent, oil-repellent, and stain-repellent finishing on the effect of velvet-feel sofa fabric.

[0082] Except for changing the amount of modified nano-SiO2 added in step (4), the other steps were the same as in Example 1. The air permeability, mechanical properties, and water, oil and stain repellency of the prepared velvet sofa fabric were evaluated, and the results are shown in Table 2. When the amount of modified nano-SiO2 added was 0.4-0.5g, the air permeability, mechanical properties, and water, oil and stain repellency were better.

[0083] Table 2

[0084]

[0085] Example 2: The effect of SMA addition amount on the effect of velvet sofa technical fabric during water-repellent, oil-repellent, and stain-repellent finishing.

[0086] Except for changing the amount of SMA added in step (4), the other steps are the same as in Example 1. The air permeability, mechanical properties, water repellency, oil repellency and stain repellency of the prepared velvet sofa technical fabric were evaluated, and the results are shown in Table 3. When the amount of SMA added is 1.5 to 1.7 g, the air permeability, mechanical properties and water repellency, oil repellency and stain repellency are better.

[0087] Table 3

[0088]

[0089] Example 3: The effect of HEA addition amount on the effect of velvet sofa technical fabric during water-repellent, oil-repellent, and stain-repellent finishing.

[0090] Except for changing the amount of HEA added in step (4), the other steps were the same as in Example 1. The air permeability, mechanical properties, water repellency, oil repellency and stain repellency of the prepared velvet sofa fabric were evaluated, and the results are shown in Table 4. When the amount of HEA added was 1.4 to 1.8 g, the air permeability, mechanical properties and water repellency, oil repellency and stain repellency were better.

[0091] Table 4

[0092]

[0093]

[0094] Example 4: The effect of HD additive amount on the effect of velvet sofa technical fabric during water-repellent, oil-repellent, and stain-repellent finishing.

[0095] Except for changing the amount of HD added in step (4), the other steps are the same as in Example 1. The air permeability, mechanical properties, water repellency, oil repellency and stain repellency of the prepared velvet sofa technical fabric were evaluated, and the results are shown in Table 5. When the amount of HD added is 1.2 to 1.5 g, the air permeability, mechanical properties and water repellency, oil repellency and stain repellency are better.

[0096] Table 5

[0097]

[0098] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A method for preparing a velvety sofa fabric, characterized in that, Includes the following steps: (1) Preparation of PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric: PET and PA6 chips are separately conveyed, dried, extruded and melted by a screw extruder, filtered, and metered by a metering pump before being fed into a spinning box. The fibers are then extruded through 16 8+8 type hollow orange-petal-shaped spinnerets, cooled by side-blowing air, and drawn at high speed by a tubular drafter. The fibers are then evenly laid on a web forming machine to form a web. After pre-humidification, the web enters a hydroentangling zone where the fibers open and entangle under high-pressure water flow. Finally, the wet web is dried, trimmed, and wound into rolls to obtain PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric. The metering pump provides quantitative dispensing; the PET:PA6 mass ratio is 70:30; the spinning box temperature is 280-300℃; the side-blowing cooling temperature is 10-15℃; the high-pressure water jet energy is 5500-5800kJ / kg; and the areal density of the hollow orange-petal-shaped microfiber nonwoven fabric is 75-85g / m². 2 The thickness is 0.40-0.45mm; (2) Preparation of waterborne polyurethane (WPU) membrane: First, mix 93 g WPU, 2 g foaming agent Hr, 2 g foam stabilizing agent Ht, 1.5 g leveling agent, and 1.5 g thickener in 250 mL of water. Then, stir the mixture at room temperature until the foaming ratio is 100%, 150%, and 200%. Finally, use a scraper to scrape the mixture into a 0.3 mm film layer on a glass plate at room temperature and quickly dry it at 80°C. Then, convert it into a WPU film at a constant temperature. (3) Preparation of PET-PA6 / WPU microfiber leather: Mix 93g WPU, 2g foaming agent Hr, 2g foam stabilizing agent Ht, 1.5g leveling agent, and 1.5g thickener in 250mL of water and foam to 100% and 250% respectively. Then, the slurry with 100% foaming ratio is scraped onto the release paper to form a film layer with a thickness of 0.2mm and dried. The slurry with 250% foaming ratio is scraped onto the surface of the film layer and the surface of the PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric to form film layers of 0.3mm and 0.1mm respectively and dried to semi-dry. Finally, the release paper composite film is laminated onto the nonwoven fabric with the film layer and dried at 80℃ for later use. (4) Water-, oil-, and stain-resistant finishing: Sodium dodecyl sulfate and octylphenol polyoxyethylene ether were dissolved in 300 mL of deionized water and stirred at room temperature. A monomer oil phase containing 0.45 g modified nano-SiO2, 1.6 g SMA, 1.6 g HEA, 6.8 g G06C, and 1.3 g HD was dispersed and added to the emulsion system and stirred until homogeneous. The mixture was then transferred to an ultrasonic cell disruptor for ultrasonic dispersion to form a monomer pre-emulsion. The pre-emulsion was mixed with a small amount of ammonium persulfate initiator aqueous solution and heated to a certain temperature while maintaining a stable rotation speed. When blue light was observed in the emulsion system, the remaining pre-emulsion and initiator aqueous solution were added dropwise at a constant rate. After maintaining the temperature for a period of time, the mixture was cooled to room temperature and filtered. The prepared emulsion was diluted with deionized water to a certain concentration and then applied to the fabric through a secondary padding process. The fabric was then pre-dried and baked at high temperature to obtain the finished fabric.

2. The plush sofa fabric prepared according to claim 1.

3. The plush sofa fabric according to claim 2, characterized in that, The velvet-feel sofa fabric comprises PET-PA6 hollow orange-petal-shaped microfiber nonwoven fabric and a water-based polyurethane coating.

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