Intelligent luggage fabric with temperature-triggered humidity regulation function and preparation method of intelligent luggage fabric

Abstract

The invention discloses an intelligent luggage fabric with a temperature-triggered humidifying function and a preparation method of the intelligent luggage fabric, and belongs to the technical field of luggage fabric materials. The intelligent luggage fabric is formed by loading a functional finishing agent coating on a fabric base material through a foam finishing process; the functional finishing agent comprises a hydrocarbon phase change microcapsule with the phase change temperature of 18-22 DEG C, a moisture-absorbing and sweat-releasing quick-drying finishing agent, a water-based adhesive, a foam stabilizer and deionized water. The preparation method of the intelligent luggage fabric comprises the steps of finishing liquid preparation, foam generation, foam application, pre-drying, baking and the like. When the environment temperature exceeds the melting point of the lithohydrocarbon phase change microcapsules, the lithohydrocarbon phase change microcapsules absorb heat to melt and release and store moisture, and meanwhile, the moisture absorption and sweat releasing quick-drying finishing agent quickly leads out and evaporates the moisture, so that the intelligent and active humidity adjusting function is realized through the cooperation of the two, and the moisture condensation in the box is effectively delayed; and the method is particularly suitable for products such as precise instrument boxes and photographic equipment bags with high requirements on internal microenvironment stability.

Description

Technical Field

[0001] This invention relates to the field of bag fabric materials technology, and in particular to a smart bag fabric with temperature-triggered humidity regulation function and its preparation method. Background Technology

[0002] With the increasing demands on storage and transportation environments for precision electronic equipment, high-end optical instruments, and valuable works of art, traditional luggage materials are struggling to meet the stringent requirements for internal microenvironment stability, particularly humidity. In environments with fluctuating temperature and humidity, the temperature difference between the inside and outside of the luggage can easily cause water vapor in the internal air to condense on the cooler surfaces of the luggage walls or equipment, a phenomenon known as "condensation." The liquid water produced by condensation can cause irreversible damage to precision equipment, including short circuits, corrosion, and mold growth.

[0003] Currently, common solutions on the market mainly rely on passive moisture-absorbing materials (such as silica gel desiccants) or simple waterproof coatings. The former has limited moisture absorption capacity, requires frequent replacement or regeneration, and cannot release excess moisture to balance the environment when the temperature rises; the latter can only prevent liquid water penetration but cannot effectively manage the condensation process. In addition, some high-end luggage uses electronic dehumidifiers, which have problems such as large size, heavy weight, dependence on power supply, and high cost.

[0004] Phase change material (PCM) microencapsulation technology has been applied to temperature regulation in textiles, but its main function is energy storage and temperature regulation, with insufficient attention paid to humidity management. While simple moisture-wicking finishing agents can improve the moisture wicking speed of fabrics, they lack the ability to intelligently respond to temperature changes.

[0005] Therefore, developing a bag fabric that can respond to changes in ambient temperature and actively and intelligently regulate the moisture inside the bag while effectively delaying or preventing condensation has significant practical application value and market prospects. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a smart bag fabric with temperature-triggered humidity regulation function. When the ambient temperature rises, it can intelligently and collaboratively perform the dual functions of heat absorption and moisture removal, thereby significantly delaying or even preventing condensation inside the bag and providing a more stable microclimate environment for the contents.

[0007] Another objective of this invention is to provide a method for preparing the above-mentioned smart bag fabric, which is simple in process, suitable for industrial production, and can uniformly and firmly load functional components onto the fabric substrate.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] In a first aspect, the present invention provides a smart bag fabric with temperature-triggered humidity regulation function. The smart bag fabric is formed by loading a functional finishing agent coating onto a fabric substrate through a foam finishing process. The functional finishing agent consists of the following components in weight percentage: 5%~20% hydrocarbon phase change microcapsules, 2%~10% moisture-wicking and quick-drying finishing agent, 5%~15% water-based adhesive, 0.1%~0.5% foam stabilizer, and the balance being deionized water. The phase change temperature of the hydrocarbon phase change microcapsules is 18℃~22℃.

[0010] The functions of each component in this invention are as follows:

[0011] The preferred fabric substrate is a lightweight composite fabric, which has certain strength, abrasion resistance and lightweight properties.

[0012] The role of hydrocarbon phase change microcapsules is to absorb heat and melt when the ambient temperature exceeds their melting point, changing from a solid to a liquid state. This process not only absorbs heat to buffer the temperature rise, but also releases the trace amounts of moisture that were previously adsorbed or locked in the micropores due to the change in their physical state.

[0013] The function of moisture-wicking and quick-drying finishing agents is to give fabric fibers lasting hydrophilicity and wicking effect. When hydrocarbon phase change microcapsules release moisture, they can quickly absorb, diffuse and guide the moisture to the fabric surface to accelerate evaporation.

[0014] The role of water-based adhesives is to firmly adhere hydrocarbon phase change microcapsules and moisture-wicking quick-drying finishing agents to the fabric substrate, forming a durable functional finishing agent coating.

[0015] The function of foam stabilizers is to make functional finishing liquids form uniform and stable foams, which facilitates low-volume application and ensures uniform distribution of functional components on the fabric.

[0016] The role of deionized water is as a dispersion medium.

[0017] This invention can utilize the synergistic effect of temperature-triggered phase change and moisture management to provide active delay for condensation in the lining of bags and cases containing precision instruments and high-end photographic equipment.

[0018] In some specific technical solutions of the present invention, the fabric substrate is selected from any one of the following: a composite fabric made of polyester Oxford cloth and microporous polyurethane membrane laminated together; a composite fabric made of polyester fiber braided layer and microporous polyurethane membrane laminated together; and a composite fabric made of nylon fiber braided layer and microporous polyurethane membrane laminated together.

[0019] As an example, the fabric substrate is a composite fabric of 210D nylon Oxford cloth and microporous polyurethane (PU) film laminate, with a weight of 120±5g / m².

[0020] In some specific technical solutions of the present invention, the moisture-wicking and quick-drying finishing agent is a hydrophilic polyurethane block copolymer finishing agent or a polyethylene glycol derivative finishing agent.

[0021] As an example, the moisture-wicking and quick-drying finishing agent is a hydrophilic polyether-polyurethane block copolymer.

[0022] In some specific technical solutions of the present invention, the water-based adhesive is an acrylic water-based adhesive or a polyurethane water-based adhesive, with a glass transition temperature of -10°C to 10°C, to ensure the flexibility and flexural strength of the coating.

[0023] As an example, the water-based adhesive is a self-crosslinking acrylic emulsion, which is an acrylic water-based adhesive with a glass transition temperature Tg≈0℃.

[0024] Alternatively, as an example, the waterborne adhesive may be an aliphatic polyurethane dispersion, which is a polyurethane-based waterborne adhesive with a glass transition temperature Tg≈-5℃.

[0025] In some specific technical solutions of the present invention, the foam stabilizer is sodium dodecyl sulfate or fatty alcohol polyoxyethylene ether.

[0026] As an example, sodium dodecyl sulfate (SDS) is used as a foam stabilizer. Alternatively, as an example, fatty alcohol polyoxyethylene ether (AEO-9) is used as a foam stabilizer.

[0027] In some specific technical solutions of this invention, the core material of the hydrocarbon phase change microcapsules is a straight-chain alkane, selected from one or more mixtures of n-octadecane, n-nonadecane, and n-eicosane. The outer shell of the hydrocarbon phase change microcapsules is melamine resin or polyurea. The particle size of the hydrocarbon phase change microcapsules is 1 μm to 10 μm.

[0028] As an example, hydrocarbon phase change microcapsules are n-nonadecane / melamine resin phase change microcapsules.

[0029] Specifically, the preparation method of n-nonadecane / melamine resin phase change microcapsules includes the following steps:

[0030] F1. Preparation of prepolymer: Melamine and formaldehyde solution with a mass fraction of 37% were added to a three-necked flask at a molar ratio of melamine:formaldehyde = 1:(4~8). The pH value was adjusted to 8.5~9.0 with triethanolamine. The mixture was stirred in a water bath at 70℃~75℃ for 60min~90min to obtain a clear and transparent aqueous solution of melamine-formaldehyde prepolymer. The solution was cooled to room temperature for later use.

[0031] F2. Emulsification: n-Nicotinane and Span-80 emulsifier are mixed as the oil phase, and sodium dodecylbenzenesulfonate is dissolved in deionized water as the aqueous phase. Under high-speed shear emulsification conditions of 10,000 rpm to 15,000 rpm, the oil phase is added to the aqueous phase and emulsification is continued for 15 min to 20 min to form a uniform and stable O / W type emulsion.

[0032] F3. In-situ polymerization: The aqueous solution of melamine-formaldehyde prepolymer prepared in step F1 is added to the O / W type emulsion obtained in step F2, and the pH of the system is adjusted to 4.5~5.0; under stirring conditions of 300rpm~500rpm, the temperature is raised to 55℃~60℃, and the reaction is maintained at this temperature for 2h~3h.

[0033] F4. Post-treatment and drying: After the reaction is completed, the product is naturally cooled to room temperature; the product is repeatedly washed by centrifugation with deionized water until the supernatant is neutral; finally, the obtained wet filter cake is dried in a vacuum drying oven at 50℃~60℃ for 12h~24h, and after grinding and sieving, white powdery n-nonadecane / melamine resin phase change microcapsules are obtained.

[0034] Secondly, the present invention provides a method for preparing the above-mentioned intelligent bag fabric with temperature-triggered humidity regulation function, comprising the following steps:

[0035] S1. Preparation of finishing solution: Add hydrocarbon phase change microcapsules, moisture-wicking and quick-drying finishing agent, water-based adhesive and foam stabilizer to deionized water according to the formula, mix evenly to form a functional finishing solution.

[0036] S2, Foam generation: The functional finishing liquid obtained in step S1 is used to generate foam slurry through a foam generating device;

[0037] S3. Foam application: Apply the foam paste evenly to the fabric substrate;

[0038] S4. Pre-baking and baking: The coated fabric substrate is pre-baked and baked to fix the foam paste on the fabric substrate and form a functional finishing agent coating. After removal, it is cooled at room temperature to obtain the finished smart bag fabric.

[0039] In some specific technical solutions of the present invention, in step S1, the mixing speed is 300 rpm to 500 rpm and the mixing time is 20 min to 40 min.

[0040] In some specific technical solutions of the present invention, in step S2, the foaming ratio of the foam slurry is 5 to 15 times.

[0041] In some specific technical solutions of the present invention, in step S3, the liquid content of the fabric substrate is controlled to be 30%~80%.

[0042] In some specific technical solutions of the present invention, in step S4, the pre-baking temperature is 80℃~100℃ and the pre-baking time is 1min~3min; the baking temperature is 130℃~160℃ and the baking time is 2min~5min.

[0043] Compared with the prior art, the present invention provides a smart bag fabric with temperature-triggered humidity regulation function and its preparation method, which has the following beneficial effects:

[0044] (1) Synergistic Intelligent Humidity Regulation Mechanism: This invention creatively combines hydrocarbon phase change microcapsules with a specific phase change temperature (18-22℃) with a moisture-wicking and quick-drying finishing agent. The design concept is as follows: When the bag moves from a low-temperature environment to a high-temperature environment (such as from an air-conditioned room to the outdoors), the internal temperature rises to the melting point of the hydrocarbon phase change microcapsules. The hydrocarbon phase change microcapsules undergo phase change and absorb heat, slowing down the internal temperature rise. The key is that the phase change process is accompanied by changes in the microstructure of the core material, which releases the trace amounts of water vapor that were previously adsorbed or sealed. At this time, the synergistic moisture-wicking finishing agent network immediately "captures" and guides these released water vapors, which are quickly discharged to the outside of the fabric through the hydrophilic channels of the fibers for evaporation. This chain reaction of "temperature triggering - moisture release - rapid discharge" can actively reduce the absolute humidity of the air inside the bag and increase the difference between the dew point temperature and the actual temperature, thereby effectively delaying or preventing condensation from the source.

[0045] (2) The functions of the components are clearly defined: the hydrocarbon phase change microcapsules act as "temperature sensors and moisture triggers", and their phase change temperature matches the transition zone of the human body's comfortable temperature range, accurately responding to common temperature change scenarios; the moisture-wicking and quick-drying finishing agent acts as "moisture fast channel", ensuring that the released moisture is transferred in time; the water-based adhesive acts as "stable carrier", ensuring the durability of the functional coating; the foam finishing process acts as "guarantee of uniform application", achieving efficient, low-consumption and uniform loading of functional components.

[0046] (3) Process advantages: The foam finishing technology adopted has the advantages of low liquid supply, uniform penetration, energy and water saving, and can maintain the original feel and breathability of the fabric. It is especially suitable for functional processing of lightweight and composite fabrics.

[0047] (4) Wide range of applications: The fabrics prepared are not only suitable for precision instrument cases and photography equipment bags, but can also be extended to medical equipment cases, military storage boxes, high-end clothing travel bags and other fields that require moisture protection. Detailed Implementation

[0048] The technical solution of the present invention will be clearly and completely described below through detailed embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0049] Unless otherwise specified, the experimental methods used in the examples and comparative examples are conventional methods, and the materials and reagents used are commercially available unless otherwise specified.

[0050] The hydrocarbon phase change microcapsules used in the embodiments of this invention are self-made n-nonadecane / melamine resin phase change microcapsules with n-nonadecane as the core material and melamine resin as the wall material. Specifically, the preparation method of the n-nonadecane / melamine resin phase change microcapsules includes the following steps:

[0051] F1. Preparation of prepolymer: Weigh 12.6g of melamine (0.1mol) and 48.6g of 37% formaldehyde solution (equivalent to 0.6mol of formaldehyde) and add them to a three-necked flask equipped with a stirrer, condenser and thermometer; add triethanolamine dropwise to the system and adjust the pH to 8.8; set the water bath temperature to 75℃ and react at a stirring speed of 300rpm for 80min to obtain a clear and transparent aqueous solution of melamine-formaldehyde prepolymer; stop heating and allow it to cool naturally to 25℃ for later use;

[0052] F2. Emulsification: Weigh 30.0g of n-nonadecane (phase change temperature approximately 20℃) as the core material, add 1.5g of Span-80 as the emulsifier, and mix thoroughly to form the oil phase; separately, take 120g of deionized water in a beaker, add 0.9g of sodium dodecylbenzenesulfonate (SDBS), and stir to dissolve to form the aqueous phase; pour the oil phase into the aqueous phase, and use a high-speed shear emulsifier to perform high-speed shear emulsification at 12000rpm for 18min to form a uniform and stable O / W type emulsion;

[0053] F3. In-situ polymerization: The aqueous solution of melamine-formaldehyde prepolymer cooled to 25°C in step F1 was slowly added to the O / W type emulsion obtained in step F2, and the pH of the system was slowly adjusted to 4.8 with a 10% citric acid solution. Then, the reaction system was placed in a water bath and heated to 58°C at a rate of 2°C / min under mechanical stirring (400 rpm). The reaction was carried out at 58°C with constant stirring for 2.5 h. During this period, the melamine-formaldehyde prepolymer underwent a condensation reaction at the oil-water interface to form a cross-linked resin wall material, which encapsulated the n-nonadecane droplets to form microcapsules.

[0054] F4. Post-treatment and drying: After the reaction, remove the heat source and allow the reaction solution to cool naturally to room temperature. Transfer the reaction product to a centrifuge tube and wash it five times with deionized water at 5000 rpm for 10 min each time, until the conductivity of the supernatant is below 50 μS / cm and the pH is approximately 6.5. Spread the wet filter cake obtained from the last centrifugation evenly in a petri dish and dry it in a vacuum drying oven at 55℃ for 24 h. After drying, gently grind the microcapsules with a mortar and pestle and pass them through a 400-mesh sieve to obtain a white, free-flowing powder of n-nonadecane / melamine resin phase change microcapsules. The average particle size (D50) of the obtained microcapsules was 5.2 μm, measured by a laser particle size analyzer (Malvern Mastersizer 3000), with 90% of the particles ranging from 2.1 μm to 9.8 μm. The phase change peak temperature was 20.3℃ and the phase change enthalpy was 185 J / g, measured by differential scanning calorimetry (DSC, TA Q20).

[0055] Example 1

[0056] This embodiment provides a smart bag fabric with temperature-triggered humidity regulation function. The smart bag fabric is formed by loading a functional finishing agent coating onto a fabric substrate through a foam finishing process.

[0057] The functional finishing agent consists of the following components by weight percentage: 8% hydrocarbon phase change microcapsules, 4% moisture-wicking and quick-drying finishing agent, 8% water-based adhesive, 0.2% foam stabilizer, and 79.8% deionized water. The fabric substrate is a 210D nylon Oxford cloth laminated with a microporous polyurethane (PU) film, with a basis weight of 120±5 g / m², purchased from Zhejiang Mingshida Co., Ltd. The hydrocarbon phase change microcapsules are the aforementioned self-made n-nonadecane / melamine resin phase change microcapsules. The moisture-wicking and quick-drying finishing agent is a hydrophilic polyether-polyurethane block copolymer, purchased from Zhejiang Chuanhua Co., Ltd., model TF-6201. The water-based adhesive is a self-crosslinking acrylic emulsion, a water-based acrylic adhesive with a glass transition temperature Tg≈0℃, purchased from BASF (China) Co., Ltd., model Acronal. ® LR 8970. Sodium dodecyl sulfate (SDS) was selected as the foam stabilizer.

[0058] The preparation method of this smart bag fabric with temperature-triggered humidity regulation function includes the following steps:

[0059] S1. Preparation of finishing solution: Add hydrocarbon phase change microcapsules, moisture-wicking and quick-drying finishing agent, water-based adhesive and foam stabilizer to deionized water according to the ratio, and stir at a low speed of 400 rpm for 30 minutes to mix evenly. Avoid high-speed stirring to avoid damaging the microcapsule structure, so as to prepare a stable functional finishing solution.

[0060] S2. Foam generation: The functional finishing liquid obtained in step S1 is introduced into a foam generating device (using a dynamic foaming machine, Monforts equipment), and the compressed air pressure is adjusted to 0.3MPa to generate a foam slurry with a foaming ratio of 10 times and uniform and fine foam size.

[0061] S3. Foam application: Lay the fabric substrate flat on the conveyor belt, and use a foam scraper or roller to evenly coat the foam slurry generated in step S2 onto the reverse side (i.e., the inner lining side) of the fabric substrate, controlling the liquid content to be 50% (the proportion of wet weight gain to dry fabric weight).

[0062] S4. Penetration and Pre-drying: The fabric substrate coated with foam paste is passed through a gentle penetration zone (such as a low-pressure roller with a linear pressure of 5 N / cm) to cause the foam to break down and the functional finishing liquid to initially penetrate the fibers; then it is pre-dried in a 100℃ hot air oven for 2 minutes to allow some of the moisture to evaporate and for initial fixation.

[0063] S5. High-temperature baking: After that, the pre-baked fabric is transferred to a baking oven at 150℃ and baked for 3 minutes to allow the water-based adhesive to fully cross-link into a film, firmly fixing the hydrocarbon phase change microcapsules and moisture-wicking quick-drying finishing agent onto the fabric substrate to form a functional finishing agent coating.

[0064] S6. Post-processing: Finally, after removing it, let it cool naturally at room temperature. If necessary, perform post-processing such as softening and calendering to obtain the finished smart bag fabric.

[0065] Example 2

[0066] This embodiment provides a smart bag fabric with temperature-triggered humidity regulation function. The smart bag fabric is formed by loading a functional finishing agent coating onto a fabric substrate through a foam finishing process.

[0067] The functional finishing agent is composed of the following components by weight percentage: 10% hydrocarbon phase change microcapsules, 3% moisture-wicking and quick-drying finishing agent, 7% water-based adhesive, 0.24% foam stabilizer, and 79.76% deionized water. The fabric substrate, hydrocarbon phase change microcapsules, moisture-wicking and quick-drying finishing agent, water-based adhesive, and foam stabilizer are all the same as in Example 1.

[0068] The preparation process of the intelligent bag fabric with temperature-triggered humidity regulation function is the same as that in Example 1, except that: (1) in step S2, the foaming ratio of the foam slurry is controlled at 12 times; (2) in step S3, the coating liquid rate is controlled at 60%; (3) in step S5, the high-temperature baking conditions are adjusted to be treated at 140℃ for 4 minutes.

[0069] Example 3

[0070] This embodiment provides a smart bag fabric with temperature-triggered humidity regulation function. The smart bag fabric is formed by loading a functional finishing agent coating onto a fabric substrate through a foam finishing process.

[0071] The functional finishing agent consists of the following components by weight percentage: 7% hydrocarbon phase change microcapsules, 5% moisture-wicking and quick-drying finishing agent, 8% water-based adhesive, 0.16% foam stabilizer, and 79.84% deionized water. The fabric substrate, hydrocarbon phase change microcapsules, and moisture-wicking and quick-drying finishing agent are the same as in Example 1. The water-based adhesive is an aliphatic polyurethane dispersion, a polyurethane-based water-based adhesive with a glass transition temperature Tg ≈ -5℃, purchased from Allnex (China) Co., Ltd., model Daotan. ® TW 6460 / 35WA; the foam stabilizer used is fatty alcohol polyoxyethylene ether (AEO-9).

[0072] The preparation process of the intelligent bag fabric with temperature-triggered humidity regulation function is the same as that in Example 1, except that: (1) in step S2, the foaming ratio of the foam slurry is controlled at 8 times; (2) in step S3, the coating liquid rate is controlled at 45%; (3) in step S5, the high-temperature baking conditions are adjusted to be treated at 155℃ for 3 minutes.

[0073] Example 4

[0074] This embodiment provides a smart bag fabric with temperature-triggered humidity regulation function. The smart bag fabric is formed by loading a functional finishing agent coating onto a fabric substrate through a foam finishing process.

[0075] The functional finishing agent is composed of the following components by weight percentage: 9% hydrocarbon phase change microcapsules, 3.6% moisture-wicking and quick-drying finishing agent, 7.4% water-based adhesive, 0.2% foam stabilizer, and 79.8% deionized water. The fabric substrate, hydrocarbon phase change microcapsules, moisture-wicking and quick-drying finishing agent, water-based adhesive, and foam stabilizer are all the same as in Example 1.

[0076] The preparation process of the intelligent bag fabric with temperature-triggered humidity regulation function is the same as that in Example 1, except that: (1) in step S3, the coating liquid rate is controlled to be 55%; (2) in step S5, the high temperature baking conditions are adjusted to be 3.5 min at 145℃.

[0077] Example 5

[0078] This embodiment provides a smart bag fabric with temperature-triggered humidity regulation function. The smart bag fabric is formed by loading a functional finishing agent coating onto a fabric substrate through a foam finishing process.

[0079] The functional finishing agent is composed of the following components by weight percentage: 6% hydrocarbon phase change microcapsules, 4.4% moisture-wicking and quick-drying finishing agent, 9.6% water-based adhesive, 0.18% foam stabilizer, and 79.82% deionized water. The fabric substrate, hydrocarbon phase change microcapsules, moisture-wicking and quick-drying finishing agent, water-based adhesive, and foam stabilizer are all the same as in Example 1.

[0080] The preparation process of the intelligent bag fabric with temperature-triggered humidity control function is the same as that in Example 1, except that: (1) in step S3, the coating liquid rate is controlled to 40%; (2) in step S5, the high-temperature baking conditions are adjusted to be treated at 160℃ for 2.5 min.

[0081] Comparative Example 1

[0082] This comparative example aims to verify the effect of lacking phase change microcapsule components.

[0083] This comparative example provides a smart bag fabric, which is formed by loading a functional finishing agent coating onto a fabric substrate through a foam finishing process.

[0084] The functional finishing agent is composed of the following components by weight percentage: 4% moisture-wicking and quick-drying finishing agent, 12% water-based binder, 0.2% foam stabilizer, and 83.8% deionized water.

[0085] Regarding the selection of raw materials and preparation process in this comparative example: except for the absence of hydrocarbon phase change microcapsules and the adjustment of the formulation amount (the binder is increased to supplement the solid content), the other raw materials used and the specific preparation process steps and parameters are exactly the same as in Example 1.

[0086] Comparative Example 2

[0087] This comparative example aims to verify the effect of lacking the moisture-wicking and quick-drying finishing agent component.

[0088] This comparative example provides a smart bag fabric, which is formed by loading a functional finishing agent coating onto a fabric substrate through a foam finishing process.

[0089] The functional finishing agent is composed of the following components by mass percentage: 8% hydrocarbon phase change microcapsules, 12% aqueous binder, 0.2% foam stabilizer and 79.8% deionized water.

[0090] Regarding the selection of raw materials and preparation process in this comparative example: except for the absence of moisture-wicking and quick-drying finishing agent and the adjustment of formula dosage (addition of adhesive to supplement solids), the other raw materials used and the specific preparation process steps and parameters are exactly the same as in Example 1.

[0091] Comparative Example 3

[0092] This comparative example aims to compare the differences between the traditional padding process and the foam finishing process of the present invention.

[0093] This comparative example provides a smart bag fabric, which is formed by loading a functional finishing agent coating onto a fabric substrate through a foam finishing process.

[0094] The functional finishing agent is composed of the following components by mass percentage: 4% hydrocarbon phase change microcapsules, 2% moisture-wicking and quick-drying finishing agent, 4% water-based adhesive and 90% deionized water.

[0095] Regarding the selection of raw materials in this comparative example: except for the absence of foam stabilizer and the adjustment of formulation dosage, all other raw materials used are exactly the same as those in Example 1.

[0096] The preparation method of the smart bag fabric in this comparative example includes the following steps:

[0097] S1. Preparation of finishing solution: Add the hydrocarbon phase change microcapsules, moisture-wicking and quick-drying finishing agent, and water-based adhesive to deionized water according to the ratio, and stir at a low speed of 400 rpm for 30 minutes to mix evenly, thereby preparing a functional finishing solution.

[0098] S2. Using traditional padding process: The fabric substrate is dipped and padded twice in functional finishing solution, with the padding rate controlled at 80%;

[0099] S3. Penetration and Pre-drying: The fabric substrate impregnated with the functional finishing liquid is passed through a gentle penetration zone (such as a low-pressure roller with a linear pressure of 5 N / cm); then it is pre-dried in a 100°C hot air oven for 2 minutes to allow partial evaporation of moisture and initial fixation.

[0100] S4. High-temperature baking: After that, the pre-baked fabric is transferred to a baking oven at 150°C and baked for 3 minutes to allow the water-based adhesive to fully cross-link into a film, firmly fixing the hydrocarbon phase change microcapsules and moisture-wicking quick-drying finishing agent onto the fabric substrate to form a functional finishing agent coating.

[0101] S5. Post-processing: Finally, after removing it from the oven, allow it to cool naturally at room temperature. If necessary, perform post-processing such as softening and calendering to obtain the finished smart bag fabric.

[0102] Performance testing

[0103] The following performance tests were conducted on the smart bag fabrics prepared in Examples 1-5 and Comparative Examples 1-3.

[0104] Test 1: Humidity regulation and anti-condensation simulation test

[0105] The sample fabric was sewn into a sealed small bag (10cm long and 10cm wide), with a miniature humidity sensor probe saturated at 25℃ inside. The bag was first placed in a 15℃ constant temperature chamber for 4 hours to equilibrate, and then quickly transferred to a constant temperature and humidity chamber at 30℃ and 50%RH. The time required for the relative humidity inside the bag to reach 90% (T90) was recorded. The longer the T90, the stronger the fabric's ability to delay the rapid rise in internal humidity (i.e., delay the tendency of condensation).

[0106] Test 2: Moisture Evaporation Rate Test

[0107] The method was improved based on the AATCC 201 standard. After completely wetting the sample fabric (10cm long and 10cm wide) in distilled water, it was centrifuged to 100% moisture content and then hung in a standard temperature and humidity environment (20℃, 65%RH). The time (Td) required for its moisture content to drop to 10% was recorded. The shorter the Td, the better the quick-drying performance of the fabric.

[0108] Test 3: Coating durability (retention rate of moisture conditioning performance after washing)

[0109] The sample fabric was subjected to 5 household washes according to the method of GB / T 8629-2017 (5A) and then air-dried. Test 1 was repeated, and the ratio of the T90 value after washing to that before washing was calculated as the performance retention rate (%).

[0110] The results of tests 1-3 are shown in Table 1 below.

[0111] Table 1. Performance test results of fabrics in the examples and comparative examples

[0112] Results analysis:

[0113] (1) As shown in Table 1, the T90 values ​​(42.0 min to 52.1 min) of all examples were significantly higher than those of Comparative Example 1 (18.5 min) and Comparative Example 2 (35.2 min). This indicates that both the hydrocarbon phase change microcapsules and the moisture-wicking and quick-drying finishing agent are indispensable, and their synergistic effect is the core of achieving excellent "temperature-triggered humidity control" and delaying condensation. Comparative Example 1 lacked a temperature-triggered moisture release source, and its humidity control effect was weak; Comparative Example 2 lacked a rapid moisture conduction channel, and although the phase change microcapsules could trigger it, the moisture could not be discharged in time, and the effect was compromised.

[0114] (2) The evaporation rates Td (20.1 min~25.8 min) of each embodiment were also significantly better than those of Comparative Example 2 (38.6 min), confirming the key role of the moisture-wicking and quick-drying finishing agent. The Td of the embodiments was close to that of Comparative Example 1, indicating that the hydrocarbon phase change microcapsules themselves had little effect on the evaporation rate.

[0115] (3) Compared with Comparative Example 3, under similar T90 conditions, Example 1 had a lower liquid retention rate (50% vs 80%), a softer hand feel, and better washability (85.3% vs 78.0%), demonstrating that the foam finishing process can save chemicals, improve fabric quality and coating fastness while maintaining performance.

[0116] In summary, this invention, through specific component design and foam finishing process, successfully prepared a smart bag fabric with significant temperature-triggered moisture regulation and anti-condensation function, with obvious effects and good prospects for industrial application.

[0117] The above embodiments are merely illustrative of the concept and technical solution of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

[0118] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A smart bag fabric with temperature-triggered humidity regulation function, characterized in that, The smart bag fabric is formed by coating a functional finishing agent onto a fabric substrate through a foam finishing process; the functional finishing agent consists of the following components by mass percentage: 5%~20% hydrocarbon phase change microcapsules, 2%~10% moisture-wicking and quick-drying finishing agent, 5%~15% water-based adhesive, 0.1%~0.5% foam stabilizer, and the balance being deionized water; the phase change temperature of the hydrocarbon phase change microcapsules is 18℃~22℃.

2. The intelligent bag fabric with temperature-triggered humidity regulation function according to claim 1, characterized in that, The fabric substrate is selected from any one of the following: a composite fabric made of polyester Oxford cloth laminated with a microporous polyurethane membrane, a composite fabric made of polyester fiber braided layer laminated with a microporous polyurethane membrane, and a composite fabric made of nylon fiber braided layer laminated with a microporous polyurethane membrane.

3. The intelligent bag fabric with temperature-triggered humidity regulation function according to claim 1, characterized in that, The moisture-wicking and quick-drying finishing agent is a hydrophilic polyurethane block copolymer finishing agent or a polyethylene glycol derivative finishing agent.

4. The intelligent bag fabric with temperature-triggered humidity regulation function according to claim 1, characterized in that, The water-based adhesive is an acrylate-based water-based adhesive or a polyurethane-based water-based adhesive, with a glass transition temperature of -10°C to 10°C.

5. The intelligent bag fabric with temperature-triggered humidity regulation function according to claim 1, characterized in that, The foam stabilizer is sodium dodecyl sulfate or fatty alcohol polyoxyethylene ether.

6. The intelligent bag fabric with temperature-triggered humidity regulation function according to claim 1, characterized in that, The core material of the hydrocarbon phase change microcapsules is selected from one or more mixtures of n-octadecane, n-nonadecane, and n-eicosane. The outer shell of the hydrocarbon phase change microcapsules is melamine resin or polyurea. The particle size of the hydrocarbon phase change microcapsules is 1μm~10μm.

7. The intelligent bag fabric with temperature-triggered humidity regulation function according to claim 6, characterized in that, The hydrocarbon phase change microcapsules are n-nonadecane / melamine resin phase change microcapsules, and the preparation method includes the following steps: F1. Preparation of prepolymer: Melamine and formaldehyde solution with a mass fraction of 37% were added to a three-necked flask at a molar ratio of melamine:formaldehyde = 1:(4~8). The pH value was adjusted to 8.5~9.0 with triethanolamine. The mixture was stirred in a water bath at 70℃~75℃ for 60min~90min to obtain a clear and transparent aqueous solution of melamine-formaldehyde prepolymer. The solution was cooled to room temperature for later use. F2. Emulsification: n-Nicotinane and Span-80 emulsifier are mixed as the oil phase, and sodium dodecylbenzenesulfonate is dissolved in deionized water as the aqueous phase. Under high-speed shear emulsification conditions of 10,000 rpm to 15,000 rpm, the oil phase is added to the aqueous phase and emulsification is continued for 15 min to 20 min to form a uniform and stable O / W type emulsion. F3. In-situ polymerization: The aqueous solution of melamine-formaldehyde prepolymer prepared in step F1 is added to the O / W type emulsion obtained in step F2, and the pH of the system is adjusted to 4.5~5.0; under stirring conditions of 300rpm~500rpm, the temperature is raised to 55℃~60℃, and the reaction is maintained at this temperature for 2h~3h. F4. Post-treatment and drying: After the reaction is completed, the product is naturally cooled to room temperature; the product is repeatedly washed by centrifugation with deionized water until the supernatant is neutral; finally, the obtained wet filter cake is dried in a vacuum drying oven at 50℃~60℃ for 12h~24h, and after grinding and sieving, white powdery n-nonadecane / melamine resin phase change microcapsules are obtained.

8. A method for preparing a smart bag fabric with temperature-triggered humidity regulation function as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. Preparation of finishing solution: Add hydrocarbon phase change microcapsules, moisture-wicking and quick-drying finishing agent, water-based adhesive and foam stabilizer to deionized water according to the formula, mix evenly to form a functional finishing solution. S2, Foam generation: The functional finishing liquid obtained in step S1 is used to generate foam slurry through a foam generating device; S3. Foam application: Apply the foam paste evenly to the fabric substrate; S4. Pre-baking and baking: The coated fabric substrate is pre-baked and baked to fix the foam paste on the fabric substrate and form a functional finishing agent coating. After removal, it is cooled at room temperature to obtain the finished smart bag fabric.

9. The method for preparing intelligent bag fabric with temperature-triggered humidity regulation function according to claim 8, characterized in that, In step S1, the mixing speed is 300 rpm to 500 rpm, and the mixing time is 20 min to 40 min; in step S2, the foaming ratio of the foam slurry is 5 to 15 times; in step S3, the liquid content of the fabric substrate is controlled to be 30% to 80%.

10. The method for preparing intelligent bag fabric with temperature-triggered humidity regulation function according to claim 8, characterized in that, In step S4, the pre-drying temperature is 80℃~100℃ and the pre-drying time is 1min~3min; the baking temperature is 130℃~160℃ and the baking time is 2min~5min.

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