A water-absorbing gelled spunlace fabric and a preparation method and application thereof

Abstract

The present application discloses a kind of water-absorbing gel water-jet fabric and its preparation method and application, its features are as follows: the component of water-jet fabric includes sodium alginate fiber and Tencel fiber, with mesh structure, the grammage is 20-25g / m 2 , the thickness is 0.12-0.25mm, water absorption is gel, water absorption is greater than or equal to 40.0g / g, the change rate of transverse and longitudinal dimension of fabric after water absorption is less than or equal to 4.5%.The preparation method includes the following steps: selecting calcium alginate fiber and Tencel fiber as raw material, making water-jet fabric by full cross-laying and water-jet process, then modifying water-jet fabric by warp beam process, then dip cleaning, finally drying after tentering setting.The water-jet fabric can be made into skin care mask, with suitable single-piece cost, long-lasting water replenishment, calming and cooling and adsorbing heavy metal and other excellent properties.The water-jet fabric can also be made into quick cooling fever-reducing patch, not only low price, quick cooling, but also comfortable to use, ecological and environmental protection.

Description

Technical Field

[0001] This invention belongs to the field of textile materials technology, specifically relating to a water-absorbing gelled spunlace fabric, its preparation method, and its application. Background Technology

[0002] Facial masks are a common type of facial skincare product in modern society. By applying them to the face, they create a closed environment, increasing the permeability of the stratum corneum and allowing the skin to absorb the moisture and essence contained in the mask, thus achieving skincare benefits. With the improvement of people's living standards and the increasing emphasis on beauty and skincare among the younger generation, the facial mask industry has experienced rapid development, and the market size of facial mask products continues to expand. It is estimated that the size of the Chinese facial mask market will exceed 72 billion yuan in 2024. There are many forms of facial masks, among which sheet masks, which use spunlace fabric as the base and are soaked in essence, have advantages such as reasonable price, convenient use, and obvious effects, and are currently the mainstream in the market. The base fabric of the mask is the carrier of the essence. During the application process, the moisture and essence on the base fabric are absorbed by the skin, so the water absorption performance of the mask base fabric is a very important indicator. Increasing the water absorption of the mask base fabric can increase the essence content on the base fabric, thereby enhancing its skincare effect. However, currently, the liquid absorption of commonly used mask base fabrics is ≤20g / g, and the application time is ≤20min, which limits the skincare effect. Therefore, increasing the liquid absorption capacity of the mask base fabric is a hot topic in the mask industry, and industry professionals have adopted various technical means.

[0003] Chinese Patent Publication No. CN 108179546A, published on June 19, 2018, entitled "A Seaweed Fiber Nonwoven Fabric and Its Production Process and Application," describes an invention that uses an organic solvent to jet-entangle a fiber web of a specific composition, followed by drying to produce a nonwoven fabric with a water absorption ratio of 15 to 40 times. However, due to the potential for splashing and evaporation during the reinforcement process of spunlace nonwoven fabrics, this application uses an organic solvent jet for fiber web reinforcement, posing safety hazards and incurring high costs, making it unsuitable for industrial mass production. Chinese Patent Publication No. CN 109010095A, published on December 18, 2018, entitled "A Mask Liquid for Seaweed Fiber Facial Mask Fabric and Its Preparation Method," describes an invention that uses a sodium lactate solution as the mask essence. The seaweed fiber facial mask fabric absorbs this essence, forming a gel-like substance with effects such as minimally invasive healing, moisturizing and water-locking, antibacterial, and radiation protection. However, the sodium lactate content should not be too high, otherwise the user will experience a stinging sensation on their face, which is very uncomfortable. Therefore, although the mask liquid prepared in this application can make the seaweed fiber mask form a gel, the liquid absorption of the mask base fabric is only 10-18 g / g, and the application time is 15-25 minutes. More importantly, there may be compatibility issues between sodium lactate and the active ingredients in the mask essence, leading to a weakening of the mask essence's efficacy. Chinese Patent Publication No. CN 109577003 A, published on April 5, 2019, entitled "Seaweed Fiber Mask Base Fabric and its Preparation Method," describes impregnating spunlace nonwoven fabric with an aqueous solution of sodium alginate, and obtaining a water-gellable seaweed fiber mask fabric after drying. The mask prepared in this application only forms a gel after the coating on the fiber surface absorbs water, while the fiber matrix does not form a gel. Therefore, the amount of gel is small, with a water absorption of 7.88-11.4 g / g, resulting in limited skin care effects. Furthermore, the mask base fabric prepared using this application has a stiff feel, poor breathability, and poor comfort when used. Chinese Patent Publication No. CN 109629114 A, published on April 16, 2019, entitled "A Gel Mask Material and Its Preparation Method," uses adhesive fibers or a mixture of adhesive and non-adhesive fibers as raw materials and employs a needle-punched nonwoven fabric process to produce a water-absorbing gel mask material. The needle-punched nonwoven fabric produced by this application is relatively thick and heavy, with a rough surface, resulting in poor comfort when used as a mask. Additionally, when using the technical solution of this application and combining it with existing disclosed technologies to produce spunlace nonwoven fabric, during the spunlace reinforcement process, the adhesive fibers absorb water to form a gel, which is then washed away by the high-pressure water flow, failing to form a fabric. Alternatively, the resulting nonwoven fabric has a poor gel effect, a stiff feel, and an uneven surface.

[0004] Modifying spunlace fabric containing seaweed fibers to create a water-absorbing, gel-forming mask base fabric can significantly improve the liquid absorption capacity of the mask base fabric. Chinese Patent Publication No. CN 110106629 A, published on August 9, 2019, entitled "A Water-Gel-Resistant Seaweed Fiber Nonwoven Fabric and Its Preparation Method and Application," describes a process where seaweed fibers are blended and carded with skeletal fibers to form a web, then hydroentangled to form a nonwoven fabric. This fabric is then impregnated with a modification solution and washed with ethanol to produce a water-absorbing, gel-forming nonwoven fabric. However, this application uses a high amount of seaweed fiber and a high concentration of modifier, resulting in a long modification time, low efficiency, and unsuitability for continuous production. Furthermore, the modification and washing processes consume large amounts of ethanol, leading to high product costs and hindering widespread application. Chinese Patent Publication No. CN 110787067A, published on February 14, 2020, entitled "A Deeply Hydrating Facial Mask Without Preservatives and Thickeners and Its Preparation Method Thereof," describes a method for creating a spunlace fabric with a double-layer structure by combining seaweed fibers of specific specifications with other fibers. The mask is then impregnated with sodium salt and polyol solutions to produce a water-absorbing gel-forming fabric. This application involves a complex process, is only applicable to seaweed fibers of specific specifications and a mask base fabric with a specific structure, resulting in high costs. Furthermore, the product is primarily for hydration and has a limited function. Chinese Patent Publication No. CN111560708A, published on August 21, 2020, entitled "A Water-Absorbing and Gel-Forming Spunlace Fabric Containing Seaweed Fiber and Its Preparation Method and Application," describes a method for creating and applying a spunlace fabric containing seaweed fibers that can absorb water and gel. This fabric is then blended and carded with calcium alginate fibers and other fibers to form a web, reinforced with a high-pressure sodium sulfate aqueous solution, and then subjected to three consecutive steps of continuous impregnation and ultrasonic cleaning to obtain a water-absorbing and gel-forming spunlace fabric. Although the spunlace fabric produced in this application can absorb water and gel immediately, with a water absorption of ≥30g / g, making it suitable for use as a face mask with noticeable skincare effects, the cost of the single-piece mask base fabric made using this method is high when the spunlace fabric has a heavy basis weight, which is not conducive to its widespread application; when the spunlace fabric has a basis weight ≤25g / m², the cost is lower. 2 However, spunlace fabrics produced using this method exhibit poor mechanical properties and a large dimensional change rate after water absorption, resulting in poor performance when used in face masks. Furthermore, while the water absorption of spunlace fabrics produced by this method is ≥30g / g, which is already very high, the absorption rate is limited when the weight of the spunlace fabric is ≤25g / m³. 2 When the amount of liquid absorbed by a single sheet mask base decreases, the application effect is limited. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a water-absorbing and gelled spunlace fabric, its preparation method, and its applications. This water-absorbing and gelled spunlace fabric has a mesh structure, particularly a single-layer mesh structure, and a fabric weight of 20–25 g / m². 2The spunlace fabric has a thickness of 0.12–0.25 mm, a transverse tensile strength ≥40.0 N / 5 cm, and a longitudinal tensile strength ≥35.0 N / 5 cm. This spunlace fabric gels upon absorbing water, with a water absorption capacity ≥40.0 g / g. The dimensional change rate in both the transverse and longitudinal directions after water absorption is ≤4.5%. This water-absorbing and gelled spunlace fabric can be used to make face masks, extending the application time and enhancing skincare effects. It also offers good breathability, comfortable application, and a calming and cooling effect. Furthermore, this water-absorbing and gelled spunlace fabric can be used to make rapid cooling and fever-reducing patches, which are not only inexpensive and provide rapid cooling but are also comfortable to apply and environmentally friendly. In addition, the water-absorbing and gelling process of this spunlace fabric can be achieved using existing industrial equipment, resulting in high production efficiency and reasonable costs for the produced single-piece face masks and fever-reducing patches.

[0006] To achieve the above objectives, the present invention proposes the following: To prepare a water-absorbing and gelled spunlace fabric, firstly, calcium alginate fiber and supporting fibers are selected as raw materials, the supporting fibers including Tencel fiber; the raw materials are processed into a spunlace fabric with a mesh structure and excellent mechanical properties; then, the spunlace fabric is modified using a sodium chloride solution, wherein the calcium alginate fiber and sodium chloride in the spunlace fabric... + The reaction generates sodium alginate fibers in situ, thus obtaining modified spunlace fabric. For example, using Tencel fibers as the supporting fibers, the sodium alginate fiber component in the spunlace fabric absorbs water and gels, while the Tencel fibers do not gel and provide support. Then, the modified spunlace fabric is washed by padding to remove residual inorganic salts. Finally, the washed modified fabric is dried using a stretching and setting process to obtain a water-absorbing and gelled spunlace fabric.

[0007] This invention, through adjusting the blending ratio of calcium alginate fiber and supporting fiber raw materials, and innovating the web-laying and hydroentangling processes, produces spunlace fabrics with sufficient strength to withstand subsequent processing. Furthermore, even after water absorption and gelation, the modified spunlace fabric retains sufficient strength and tear resistance, meeting the application requirements of beauty and skincare masks and rapid cooling and fever-reducing patches. During the modification of the spunlace fabric, sodium chloride is first impregnated onto the fabric, followed by modification treatment in a warp roller cylinder. During modification, only the solution circulates while the fabric remains stationary on the warp roller, avoiding strength damage and dimensional deformation during the modification process. Simultaneously, by optimizing the type of solution injected into the warp roller cylinder, quality loss of the spunlace fabric during modification is avoided. The modified spunlace fabric is then subjected to impregnation and washing to thoroughly remove residual inorganic salts, ensuring that the water absorption of the finished spunlace fabric is ≥40.0 g / g, with a relatively small amount of washing solution used, resulting in a reasonable cost. Finally, through the control of the stretching, setting, and drying process, the resulting spunlace fabric not only has a smooth surface but also good dimensional stability after water absorption, meeting the requirements for use in beauty and skincare masks and fever-reducing patches.

[0008] Specifically, the present invention provides a water-absorbing and gelled spunlace fabric with a mesh structure, and the basis weight of the water-absorbing and gelled spunlace fabric is 20-25 g / m². 2 The thickness is 0.12~0.25mm, the transverse breaking strength is ≥40.0N / 5cm, the longitudinal breaking strength is ≥35.0N / 5cm, the water absorption is ≥40.0g / g, the moisturizing time is ≥40min, and the transverse and longitudinal dimensional change rates of the fabric after water absorption are both ≤4.5%.

[0009] The water-absorbing and gelled spunlace fabric comprises sodium alginate fibers and Tencel fibers, wherein the sodium alginate fiber content is 15%–20% and the linear density is 1.5–2.0 dtex; the Tencel fiber content is 80%–85% and the linear density is 0.90–1.33 dtex; in some embodiments, the present invention provides a method for preparing the water-absorbing and gelled spunlace fabric, as follows:

[0010] (1) Using calcium alginate fiber and Tencel fiber as raw materials, a full cross-laid web is made, and the spunlace fabric with a mesh structure is reinforced by hydroentanglement process.

[0011] The fiber web contains at least two types of fibers with different functions. For example, calcium alginate fibers are modified to become sodium alginate fibers, which can absorb water and gel, giving the modified spunlace fabric better water absorption and gelation properties. Tencel fibers are hydrophilic fibers with the best mechanical properties and can be used as a support component. They do not gel when they absorb water and serve as the skeleton of the spunlace fabric, ensuring that the resulting mask base fabric and rapid cooling and heat-reducing patches have sufficient strength and are easy to remove and use. The spunlace fabric produced using a cross-laying process has similar uniformity in the transverse and longitudinal directions, ensuring that the spunlace fabric can not only absorb water and gel, but also is tear-resistant, dimensionally stable, and not easily deformed. It should be noted that the Tencel fiber used as the support fiber in this invention is only one of many suitable fibers, as long as it can achieve the physicochemical properties of the water-absorbing and gelling spunlace fabric prepared in this invention.

[0012] (2) The prepared spunlace fabric is impregnated with a sodium chloride aqueous solution of 40-100 g / L, and then modified by the warp beam process to obtain the modified spunlace fabric.

[0013] In spunlace fabrics, calcium alginate fibers undergo ion exchange in a sodium salt solution, generating sodium alginate fibers capable of absorbing water and gelling. From a safety and environmental perspective, this invention uses a sodium chloride aqueous solution to modify the spunlace fabric. To ensure that all calcium alginate fibers in the spunlace fabric are converted into sodium alginate fibers, and that the sodium alginate fibers generated during the modification process do not gel, the concentration of the sodium chloride aqueous solution is controlled within the range of 40–100 g / L.

[0014] However, according to existing publicly available impregnation or spunlace technology, using a sodium chloride solution with a concentration of 40-100 g / L to modify spunlace fabrics for finishing: when the modification time is ≤10 min, the modification is insufficient, the gel effect of the prepared spunlace fabric is poor, and the liquid absorption is ≤25.0 g / g, which cannot achieve the purpose of this invention; when the modification time is >10 min, the structure of the spunlace fabric is greatly damaged, the strength of the fabric is seriously reduced, and the fabric is severely deformed after absorbing water.

[0015] This invention employs a warp beam process to modify spunlace fabrics. The warp beam process mainly utilizes a cylindrical dyeing tank, a warp beam, a storage tank, and a circulating pump. The spunlace fabric is wound onto a hollow warp beam filled with small holes and then placed into a cylindrical dyeing tank. Under the action of the circulating pump, the modification solution flows through the small holes of the hollow warp beam onto the spunlace fabric on the warp beam and flows in the reverse direction at regular intervals, while the spunlace fabric remains stationary.

[0016] This invention creatively applies warp beam technology to the treatment of spunlace fabrics containing seaweed fibers, in order to solve the problem of low basis weight (≤25g / m²) of seaweed-containing fabrics. 2 The technical problem of structural deformation during the modification process of spunlace fabrics. Using a warp beam process ensures sufficient modification time, and since only the solution circulates during modification, the spunlace fabric remains stationary on the warp beam, preventing structural changes. The modified spunlace fabric exhibits high strength and no deformation. Furthermore, the warp beam process enables large-scale production, reducing production costs.

[0017] (3) The modified spunlace fabric is impregnated and washed to remove the residual inorganic salts in the fabric, and the modified spunlace fabric is obtained.

[0018] Modified spunlace fabrics often contain inorganic salt residues. Direct drying of these fabrics results in poor absorbency and insufficient liquid absorption. A pad-washing system removes the high concentration of inorganic salts from the spunlace fabric before it undergoes a single pad-washing process, eliminating the need for multiple cleaning steps and achieving the desired effect. This solution not only provides excellent cleaning results and high efficiency but also consumes less cleaning solution, leading to lower costs.

[0019] (4) The spunlace fabric after cleaning and modification is dried by using a stretching and setting process to obtain a water-absorbing and gelled spunlace fabric.

[0020] Spunlace fabrics are nonwoven fabrics and are generally dried using a drying drum. If this drying method is used in this invention, the resulting spunlace fabric will have an uneven surface and will swell and deform after absorbing water, failing to meet the requirements for use as a mask base fabric and for rapid cooling and heat-reducing patches. Tensile drying can maintain a smooth fabric surface, but due to the high temperature and tensile stress, this process is mainly used for drying woven and knitted fabrics and is not suitable for nonwoven fabrics. The hydrogel spunlace fabric prepared by this invention contains ethanol-water solution residue before drying, and the fabric is thin and lightweight, making it particularly easy to dry, but it cannot withstand significant tensile stress. To address these characteristics, this invention achieves tentative drying of spunlace fabrics through an innovative process that reduces drying temperature and tensile stress while increasing drying speed.

[0021] The water-absorbing gelled spunlace fabric prepared by the technical solution provided by this invention can be made into a beauty and skin care mask. It has a water absorption capacity of ≥40.0g / g, an application time of over 40 minutes, and is soft, comfortable, non-deformable, tear-resistant, and easy to apply and remove. Furthermore, this water-absorbing gelled spunlace fabric can also be made into a rapid cooling and fever-reducing patch. When used, it is soaked in water and can be applied without adhesive (commercially available fever-reducing patches require adhesive and must be attached to the head). It is comfortable to apply, provides rapid cooling, and avoids the environmental pollution problems associated with non-degradable products after disposal.

[0022] Preferably, the present invention provides a method for preparing a water-absorbing and gelled spunlace fabric, the method comprising the following steps:

[0023] (1) Weigh calcium alginate fiber and support fiber, mix them, open them, and comb them to obtain a mixed fiber web;

[0024] The calcium alginate fiber content is 15%–20%, and the linear density is 1.5–2.0 dtex; the Tencel fiber content is 80%–85%, and the linear density is 0.90–1.33 dtex.

[0025] The fiber web is reinforced by hydroentangling to form a fabric. During subsequent modification, the calcium alginate fibers in the fabric are transformed into sodium alginate fibers. Therefore, the sodium alginate fiber content in the modified, water-absorbing, gelled spunlace fabric depends on the calcium alginate fiber content in the fiber web. The sodium alginate fiber content in the modified spunlace fabric has a significant impact on its overall performance. When the sodium alginate fiber content is low, the amount of gel formed after water absorption is small, making it difficult to achieve an overall gel effect on the fabric surface. The water absorption is below 40.0 g / g, failing to achieve the purpose of this invention. When the sodium alginate fiber content is too high, the resulting spunlace fabric has poor strength and poor dimensional stability after water absorption, making it inconvenient to peel off and apply. Since the sodium alginate fiber content in the produced spunlace fabric depends on the calcium alginate fiber content in the fiber web, this invention preferably uses a calcium alginate fiber content of 15%–20% in the fiber web. This achieves a water absorption of ≥40.0 g / g for the prepared spunlace fabric, along with good strength and dimensional stability, meeting the requirements for use in beauty and skincare masks and rapid cooling and heat-reducing patches. Furthermore, it should be noted that the physical morphology and quality changes of the fibers during the use of sodium chloride and warp beam processing are very small, and the deformation of the spunlace fabric is controllable.

[0026] (2) The fiber web is fed into the web laying machine for full cross-laying, and then punctured and reinforced by high pressure water flow, dried, and rolled to obtain a spunlace fabric with a single-layer mesh structure.

[0027] There are many web-laying processes for spunlace nonwoven fabrics. This invention employs a fully cross-laid web process, which can improve the uniformity of strength in both the transverse and longitudinal directions of the spunlace fabric, ensuring that the resulting water-absorbing, gelled spunlace fabric is tear-resistant and not easily deformed. Spunlace fabrics also come in many surface styles. This invention uses a mesh structure, which increases the contact area between water and fibers. The resulting spunlace fabric can quickly form a gel upon contact with water, and its liquid absorption capacity is increased.

[0028] (3) The spunlace fabric is first soaked in a sodium chloride aqueous solution with a concentration of 40-100g / L, then spun dry evenly by a rolling mill, and then rolled and wound onto a warp beam.

[0029] The warp beam modification process for fabrics typically involves winding dry fabric onto a warp beam and then injecting a modifier solution into a warp beam cylinder. Because the number of layers of fabric wound on the warp beam is very large (especially when increasing production and reducing costs, even more layers are needed), this process requires a high circulation pump pressure to enhance solution penetration and ensure uniform modification. Otherwise, significant differences in treatment effects between the inner and outer layers of fabric wound on the warp beam can occur, failing to meet requirements. In this invention, the above process has the following limitations: when the circulation pump pressure is high, the sodium alginate fibers on the spunlace fabric are washed into the solution during treatment, resulting in a loss of spunlace fabric mass and very poor hydrogel properties; when the circulation pump pressure is low, the difference in hydrogel properties between the outer and inner layers of fabric on the warp beam is too great, making large-scale production impossible. The present invention preferably uses a method of first impregnating the spunlace fabric with an aqueous sodium chloride solution and then rolling it dry and then rolling it up. This method can uniformly load sodium chloride (modifier) ​​onto the spunlace fabric. When the subsequent modification treatment is carried out in the warp cylinder, it ensures that the modification treatment effect of the spunlace fabric wrapped in the inner and outer layers of the warp beam is consistent, and avoids the quality loss of the spunlace fabric after the modification treatment.

[0030] (4) Push the warp beam wrapped with spunlace fabric into the warp beam cylinder, and then inject a solution into the warp beam cylinder for modification treatment;

[0031] The solution injected into the shaft cylinder is a mixture of ethanol and water with a mass percentage concentration of 10% to 20%, the solution temperature is 20 to 60°C, and the modification treatment time is 10 to 30 minutes.

[0032] During the modification process, the solution in the cylinder undergoes both internal and external circulation. Each cycle consists of 10 circulations, and the ratio of internal to external circulation in one cycle is 5 / 5 or more.

[0033] The chemical modification treatment of spunlace fabric by applying sodium chloride (modifier) ​​requires the flow of solution in the warp roller. When an aqueous solution is injected into the warp roller, the modification reaction is more complete, but the sodium alginate fibers generated during the modification process gel and are dissolved by the aqueous solution. This results in a mass loss and poor gelation effect in the modified spunlace fabric. Sodium alginate fibers do not gel in ethanol, but sodium chloride (modifier) ​​does not dissolve in ethanol, leading to an incomplete chemical reaction and poor gelation effect in the modified spunlace fabric. This invention preferably uses a 10%–20% (w / w) ethanol and water mixture injected into the warp roller. This ensures sufficient modification of the spunlace fabric while avoiding mass loss, guaranteeing excellent water absorption and gelation performance with a water absorption capacity ≥40.0 g / g.

[0034] Solution temperature and modification treatment time both affect the modified chemical reaction and the treatment effect on spunlace fabrics. Increasing the solution temperature can shorten the modification treatment time, but the ethanol in the solution is prone to volatilization, leading to a loss of mass in the modified spunlace fabric. Decreasing the solution temperature results in a longer modification treatment time, which is not only inefficient, but also causes the spunlace fabric to easily lose strength and deform due to prolonged immersion, affecting its performance. This invention preferably uses a 10%–20% (w / w) ethanol and water mixture solution injected into the warp cylinder, with a matching solution temperature of 20–60°C and a modification treatment time of 10–30 minutes.

[0035] (5) The spunlace fabric modified by the shaft is spun dry and then immersed in the cleaning solution to remove the inorganic salts remaining on the modified spunlace fabric.

[0036] The cleaning solution used for immersion and rolling is a mixed solution of ethanol and water with a mass percentage concentration of 40% to 80%, and the rolling mill pressure is 0.2 to 0.4 MPa.

[0037] After direct drying, spunlace fabrics modified in the warp beam still retain inorganic salt residues, resulting in poor water absorption and gelation properties. If existing warp beam modification processes are followed, the modified spunlace fabric is further immersed in the warp beam to remove residual substances, requiring more than three immersions in an ethanol-water solution. This is not only inefficient and time-consuming but also consumes a large amount of ethanol, increasing costs. This invention preferably involves first rinsing the modified spunlace fabric in the warp beam to reduce residual inorganic salts, followed by rinsing to thoroughly remove residual inorganic salts from the fabric surface. These two steps can be performed continuously, resulting in better cleaning effects, higher efficiency, lower ethanol consumption, and lower costs.

[0038] After being pacified, the modified spunlace fabric undergoes slight gelation and swelling in a low-concentration ethanol aqueous solution. Under the pressure of the pacing rollers, the colloids in the modified spunlace fabric are detached. Therefore, when the ethanol concentration in the pacing cleaning solution is low, the modified spunlace fabric experiences mass loss after pacing, and the water absorption and gelation effect is poor. Increasing the ethanol concentration in the pacing cleaning solution can increase the pacing pressure of the spunlace fabric, resulting in a better cleaning effect; however, when the ethanol concentration in the pacing cleaning solution is too high, the cleaning effect deteriorates due to the low solubility of inorganic salts in the cleaning solution, and higher ethanol concentrations also increase costs. At lower pacing pressures, the residual liquid in the modified spunlace fabric is too large, resulting in a poor cleaning effect and requiring more pacing cycles, increasing costs. At higher pacing pressures, the colloids in the modified spunlace fabric are easily lost, deformed under pressure, and their strength deteriorates, affecting the water absorption and gelation effect, liquid absorption capacity, and application performance of the finished modified spunlace fabric. The rolling pressure is related to the ethanol concentration in the cleaning solution used for padding; the higher the ethanol concentration, the greater the rolling pressure that the modified spunlace fabric can withstand. Considering the influence of the above factors, the present invention preferably uses a mixed solution of ethanol and water with a mass percentage concentration of 40% to 80%, and the corresponding rolling pressure is 0.2 to 0.4 MPa.

[0039] (6) The spunlace fabric after being impregnated with cleaning solution is stretched, fixed and dried to obtain a water-absorbing gelled spunlace fabric.

[0040] The stretching, setting, and drying process involves using a fabric where the width between the needle holes is 0.95 to 1.05 times the width of the spunlace fabric prepared in step (2), the oven temperature of the setting machine is 50 to 70°C, and the speed of the setting machine is 40 to 50 m / min.

[0041] The water-absorbing gelled spunlace fabric prepared by this invention requires its width to be fixed to a specific width during drying to solve the problem of water absorption deformation in the finished spunlace fabric. However, low basis weight (≤25g / m²) 2 Spunlace fabrics are not resistant to stretching during the stretching and setting process. To avoid edge breakage, stretching deformation, and structural damage of low-grammage spunlace fabrics during the setting and drying process, it is necessary to control the drying speed and stretching width of the spunlace fabric to match. In this invention, the width between the needle holes on the fabric surface is preferably 0.95 to 1.05 times the width of the spunlace fabric prepared in step (2) during the stretching and setting process. The oven temperature of the setting machine is 50 to 70°C, and the speed of the setting machine is 40 to 50 m / min. By reducing the drying temperature and accelerating the setting speed, the specific width setting and drying of low-grammage spunlace fabrics is achieved, ensuring the physical state of the final product with high quality and effectively controlling the deformation properties of the fabric.

[0042] In some embodiments, the present invention also provides a water-absorbing gelled face mask made of a water-absorbing gelled spunlace fabric as described above, or made of a spunlace fabric obtained by the aforementioned method for preparing water-absorbing gelled spunlace fabric.

[0043] In some embodiments, the present invention also provides a rapid cooling and fever-reducing patch, made of a water-absorbing gelled spunlace fabric as described above, or a spunlace fabric obtained by the aforementioned method for preparing water-absorbing gelled spunlace fabric.

[0044] Due to the adoption of the above technical solution, the beneficial technical effects of the present invention regarding the water-absorbing gelled spunlace fabric, its preparation method, and its application are as follows:

[0045] 1. This invention provides a water-absorbing and gelled spunlace fabric that is lightweight and breathable, yet absorbent and gelled, with a water absorption capacity of ≥40.0g / g. Furthermore, the fabric exhibits excellent tear resistance and tensile deformation resistance after water absorption. Face masks and fever-reducing patches made from this fabric are low-cost, achieving a balance between effectiveness, comfort, and affordability, thus enhancing product added value and market competitiveness.

[0046] 2. This invention provides a method for preparing water-absorbing and gelled spunlace fabric. It uses conventional calcium alginate fiber and Tencel fiber as raw materials, and employs existing industrialized processes and equipment for spunlace nonwoven fabric processing, warp beam modification, and stretching, setting, and drying. Through an innovative combination of process technologies, it achieves large-scale, high-efficiency production of water-absorbing and gelled spunlace fabric. The process is ingenious, the preparation method is simple, the production efficiency is high, the cost is reasonable, and it facilitates the promotion and application of the product.

[0047] 3. The beauty and skin care mask made of water-absorbing and gelled spunlace fabric provided by this invention can be used with various functional essences, all of which can gel. No thickeners or other ineffective ingredients need to be added to the essence. The water absorption is ≥40.0g / g, and the application time is more than 40 minutes. Through the synergistic effect between the gel components and the functional components, the comfort and skin care effect of the mask are enhanced. It also has good breathability, comfortable application, and calming and cooling properties during the application process, achieving a balance between outstanding skin care effect and comfortable use.

[0048] 4. The rapid cooling and fever-reducing patch made of water-absorbing gelled spunlace fabric provided by this invention can be applied directly after adding water to form a viscous gel, without the need for adhesives (existing fever-reducing patches require adhesives to adhere to the skin). It offers advantages such as resistance to falling off, comfortable application, and rapid cooling. Furthermore, existing commercially available fever-reducing patches are composed of synthetic polymer hydrogels and non-woven fabrics made of synthetic fibers, both of which are non-degradable and pose environmental pollution problems. The fever-reducing patch made of water-absorbing gelled spunlace fabric provided by this invention is composed of biodegradable fiber materials and can be reused by adding water (when the product's moisture content decreases after use and its fever-reducing effect diminishes), reducing the number of patches used. Even when discarded, it does not cause environmental pollution. Attached Figure Description

[0049] Figure 1 Schematic diagram of the preparation process of water-absorbing gelled spunlace fabric.

[0050] Figure 2 The mask base fabric (face shape) made from samples a and c of Example 3 is shown in the effect diagram of natural hanging (with partial support) after being saturated with water.

[0051] Figure 3 The mask base fabric (face shape sample) made from samples a and c of Example 3 is shown in the image of a hand-held hanging device (simulating the application process) after being saturated with water.

[0052] Figure 4 : A schematic diagram of the testing device when the mask base fabric (face shape sample) prepared in Example 5 is tested for hydration.

[0053] Figure 5 : A schematic diagram of the testing device used to test the adsorption performance of the mask base fabric (face shape sample) prepared in Example 5 on heavy metals.

[0054] Figure 6 Example 5: The spunlace fabric prepared in step (2) (sample 1#), the water-absorbing gelled spunlace fabric prepared in step (6) (sample 2#), and the commercially available seaweed fiber spunlace fabric (seaweed fiber content of 30%, fabric weight of 30 g / m²) 2 The evaporation rate test results are recorded as those for sample 3#.

[0055] Figure 7 Example 5: The spunlace fabric prepared in step (2) (sample 1#), the water-absorbing gelled spunlace fabric prepared in step (6) (sample 2#), and the commercially available seaweed fiber spunlace fabric (seaweed fiber content of 30%, fabric weight of 30 g / m²) 2 The water replenishment test results are recorded as those for sample 3#.

[0056] Figure 8 Example 5: The spunlace fabric prepared in step (2) (sample 1#), the water-absorbing gelled spunlace fabric prepared in step (6) (sample 2#), and the commercially available seaweed fiber spunlace fabric (seaweed fiber content of 30%, fabric weight of 30 g / m²) 2 The results of the heavy metal adsorption performance test of sample 3# are recorded.

[0057] Figure 9 The cooling performance test results of rapid cooling and fever-reducing patches made from the spunlace fabric (sample 1#) prepared in step (2) and the water-absorbing gelled spunlace fabric (sample 2#) prepared in step (6) of Example 5 and commercially available fever-reducing patches (sample 3#). Detailed Implementation

[0058] The following detailed description, with reference to specific embodiments, illustrates the present invention's ultra-lightweight spunlace fabric capable of absorbing water and gelling, its preparation method, and its applications:

[0059] Example 1

[0060] (1) Weigh out 10 kg, 13 kg, 15 kg, 18 kg, 20 kg and 22 kg of calcium alginate fiber (linear density of 1.5 dtex) respectively, and weigh out 90 kg, 87 kg, 85 kg, 82 kg, 80 kg and 78 kg of Tencel fiber (linear density of 0.90 dtex) respectively. Mix the two types of fibers to obtain six blended fibers. The mass of each blended fiber is 100 kg. Each blended fiber is opened and combed to obtain a uniformly mixed fiber web. (2) Feed the fiber web into a web laying machine for full cross-laying, then use high-pressure water jet for puncture reinforcement, dry, and roll to obtain a spunlace fabric with a mesh structure and a basis weight of 20 g / m². 2 The thickness is 0.12 mm and the width is 1800 mm; (3) The spunlace fabric is first soaked in a sodium chloride aqueous solution with a concentration of 100 g / L, then uniformly rolled dry, and then rolled and wound on a warp beam; (4) The warp beam wound with ultra-light and thin spunlace fabric is pushed into the warp beam cylinder, and a mixed solution of ethanol and water with a mass percentage concentration of 20% is injected for modification treatment. The ratio of the number of times the solution circulates inside and outside the warp beam cylinder is 5 / 5, the solution temperature is 60℃, and the modification treatment time is 10 min; (5) First, the spunlace fabric modified by the warp shaft is rolled dry, and then immersed in a mixed solution of ethanol and water with a mass percentage concentration of 40% to remove the residual inorganic salts in the spunlace fabric. The rolling pressure is 0.2 MPa. (6) The spunlace fabric after rolling and washing is stretched, set and dried. The width between the needle holes on the fabric surface is 0.95 times the width of the spunlace fabric prepared in step (2). The oven temperature is 70℃ and the machine speed is 50 m / min. After drying, the fabric is then trimmed, inspected and rolled to obtain six kinds of water-absorbing gelled spunlace fabrics. According to the sodium alginate fiber content in the prepared water-absorbing gelled spunlace fabrics from low to high, they are named samples a, b, c, d, e and f in sequence.

[0061] The water absorption of spunlace fabric was tested using the following method: (1) The spunlace fabric was laid flat on the workbench without tension, and then cut into samples with a size of 10cm*10cm. The samples were placed in an oven and dried at 80℃ to constant weight. Then, they were placed in a glass desiccator to cool to room temperature and weighed quickly, recorded as W1 (g); (2) The weighed spunlace fabric sample was soaked in 50mL of distilled water and allowed to soak naturally for 3min. After soaking, the sample was taken out and allowed to drip water naturally in the air for 3min. The sample was weighed quickly and recorded as W2 (g). The water absorption W (g / g) of the sample was calculated according to the following formula (1). Five samples were tested for each type of sample, and the average value was taken.

[0062]

[0063] The following method was used to test the dimensional change rate of spunlace fabric: (1) The spunlace fabric was laid flat on the workbench without tension, and then cut into samples with a size of 20cm*20cm. The transverse (width direction) and longitudinal (vertical direction) of the sample were marked. The transverse and longitudinal lengths of the fabric were measured accurately to 1mm and recorded as L1 (mm); (2) 50mL of distilled water was poured onto the flat spunlace fabric to completely wet it. After the fabric size stabilized for 1min, the transverse and longitudinal lengths of the fabric were measured accurately to 1mm and recorded as L2 (mm). The dimensional change rate N (%) of the sample after water absorption was calculated according to the following formula (2). Five samples were tested for each type of sample, and the average value was taken.

[0064]

[0065] Referring to GB / T 24218.3-2010 Textiles - Nonwovens - Test Methods - Part 3: Determination of breaking strength and elongation at break, the transverse breaking strength and longitudinal breaking strength of spunlace fabrics were tested. Each sample was tested 5 times, and the average value was taken.

[0066] Table 1. Properties of the six spunlace fabrics prepared in Example 1

[0067]

[0068] Example 1 mainly studied the effect of the calcium alginate fiber content in the fiber web on the performance of the prepared water-absorbing gelled spunlace fabric. Using the above method, the water absorption, transverse and longitudinal tensile strength, and transverse and longitudinal dimensional change rates of the six water-absorbing gelled spunlace fabrics prepared in Example 1 were tested. The results are shown in Table 1. As can be seen from Table 1, all six spunlace fabrics prepared in Example 1 can absorb water and form a gel. The water absorption of the fabric increases with the increase of the calcium alginate fiber content in the fiber web. When the calcium alginate fiber content is less than 15%, the liquid absorption of the prepared ultra-thin spunlace fabric is less than 40.0 g / g, which does not meet the requirements of this invention. Since the strength of calcium alginate fiber is relatively poor compared to Tencel fiber, the tensile strength of the prepared water-absorbing gelled spunlace fabric decreases with the increase of the calcium alginate fiber content in the fiber web. When the calcium alginate fiber content in the fiber web is higher than 20%, the longitudinal and transverse tensile strengths of the prepared water-absorbing gelled spunlace fabric do not meet the requirements of this invention. Therefore, the preferred content of calcium alginate fiber in the fiber web of the present invention is 15% to 20%.

[0069] Example 2

[0070] (1) Weigh 20 kg of calcium alginate fiber (linear density 2.0 dtex) and 80 kg of Tencel fiber (linear density 1.33 dtex) respectively, physically mix the two fibers, then open and comb them to obtain a uniformly mixed fiber web; (2) Feed the fiber web into a web-laying machine for full cross-laying, use high-pressure water jet for puncture reinforcement, dry, and roll to obtain a single-layer spunlace fabric with a basis weight of 25 g / m². 2 The thickness is 0.25 mm and the width is 1800 mm; (3) The spunlace fabrics made are soaked in sodium chloride aqueous solutions with concentrations of 30 g / L, 40 g / L, 60 g / L, 80 g / L, 100 g / L and 110 g / L respectively, and then uniformly rolled dry. They are then rolled and wound onto the warp beam to obtain six samples. According to the concentration of sodium chloride aqueous solution from low to high, they are named samples a, b, c, d, e and f respectively.

[0071] The above six samples were subjected to the same post-treatment as follows: the warp beam wrapped with spunlace fabric was pushed into the warp beam cylinder, and a mixed solution of ethanol and water with a mass percentage concentration of 10% was injected for modification treatment. The ratio of the number of times the solution circulated inside and outside the warp beam cylinder was 5 / 5, the solution temperature was 20℃, and the modification treatment time was 30min. The modified spunlace fabric in the warp beam was rolled dry, and then immersed in a mixed solution of ethanol and water with a mass percentage concentration of 80% to remove the residual inorganic salts in the spunlace fabric. The pressure of the uniform rolling machine was 0.4Mpa. The spunlace fabric after rolling and washing was stretched, shaped and dried. The width between the needle holes on the fabric surface was 1.05 times the width of the spunlace fabric prepared in step (2). The oven temperature was 50℃ and the machine speed was 40m / min. After drying, the fabric was cut, inspected and rolled to obtain six kinds of water-absorbing gelled spunlace fabrics.

[0072] Example 2 mainly studies the effect of sodium chloride aqueous solution concentration on the properties of the prepared water-absorbing gelled spunlace fabric during the modification treatment. Using the method of Example 1, the water absorption, transverse breaking strength, and longitudinal breaking strength of the six water-absorbing gelled spunlace fabrics prepared in Example 2 were tested, as well as the transverse dimensional change rate and longitudinal dimensional change rate. The results are shown in Table 2.

[0073] Table 2. Properties of the six spunlace fabrics prepared in Example 2

[0074]

[0075] As shown in Table 2, all six water-absorbing gelled spunlace fabrics prepared in Example 2 can absorb water and form gels. The water absorption of the fabrics initially increases and then decreases with increasing sodium chloride concentration during the modification treatment. When the concentration of the sodium chloride aqueous solution is below 40 g / L, the calcium alginate fibers in the spunlace fabric cannot be completely converted into sodium alginate fibers, resulting in a water absorption of less than 40.0 g / g, which does not meet the requirements of this invention. As the sodium chloride concentration increases, the calcium alginate fibers are completely converted into sodium alginate, and the liquid absorption of the spunlace fabric reaches its maximum value. Further increasing the sodium chloride concentration results in an excessively high residual salt concentration on the modified spunlace fabric after padding and washing, leading to a poorer water-absorbing gel effect and a decrease in liquid absorption. Therefore, the preferred concentration of the sodium chloride aqueous solution used to impregnate the spunlace fabric of this invention is 40–100 g / L.

[0076] Example 3

[0077] (1) Weigh 18 kg of calcium alginate fiber (linear density 1.8 dtex) and 82 kg of Tencel fiber (linear density 1.12 dtex) respectively, physically mix the two fibers, and then open and comb them to obtain a uniformly mixed fiber web; (2) Feed the fiber web into a web laying machine for full cross-laying, then use high-pressure water jet for puncture reinforcement, dry, and roll to obtain a single-layer spunlace fabric with a basis weight of 22 g / m². 2 The thickness is 0.20 mm and the width is 1800 mm; (3) The spunlace fabric is first soaked in a sodium chloride aqueous solution with a concentration of 80 g / L, then uniformly rolled dry, and then wound onto a warp beam; (4) The warp beam with the spunlace fabric is pushed into the warp beam cylinder, and a mixed solution of ethanol and water with a mass percentage concentration of 15% is injected for modification treatment. The ratio of the number of times the solution circulates inside and outside the warp beam cylinder is 6 / 4, the solution temperature is 40℃, and the modification treatment time is 20 min; (5) The modified spunlace fabric in the warp beam is first rolled dry, and then soaked A mixed solution of ethanol and water with a mass percentage concentration of 60% was used to remove residual inorganic salts from the spunlace fabric. The padding pressure was 0.3 MPa. (6) The spunlace fabric after padding and washing was stretched, set, and dried. The width between the needle holes on the fabric surface was set to 0.80 times, 0.90 times, 0.95 times, 1.00 times, 1.05 times, and 1.10 times the width of the spunlace fabric prepared in step (2). The oven temperature was 60℃ and the machine speed was 45 m / min. After drying, the fabric was trimmed, inspected, and rolled to obtain six kinds of water-absorbing and gelled spunlace fabrics. According to the width of the prepared water-absorbing and gelled spunlace fabrics from high to low, they were named samples a, b, c, d, e, and f.

[0078] Example 3 mainly studies the effect of fabric width during stretching, setting, and drying of the cleaned and modified spunlace fabric on the performance of the prepared water-absorbing gelled spunlace fabric. Using the method of Example 1, the water absorption, transverse breaking strength, and longitudinal breaking strength of the six water-absorbing gelled spunlace fabrics prepared in Example 3, as well as the transverse dimensional change rate and longitudinal dimensional change rate, were tested. The results are shown in Table 3.

[0079] Table 3. Properties of the six spunlace fabrics prepared in Example 3

[0080]

[0081] As shown in Table 3, all six water-absorbing gelled spunlace fabrics prepared in Example 3 can absorb water and form gels, with similar water absorption capacities, all exceeding 40.0 g / g, meeting the requirements of this invention. Therefore, the fabric width during stretching, setting, and drying of the modified spunlace fabric has little impact on the water-absorbing gel properties and liquid absorption capacity of the resulting modified spunlace fabric. However, the fabric width during stretching, setting, and drying of the modified spunlace fabric has a significant impact on the transverse and longitudinal dimensional change rates of the resulting modified spunlace fabric after water absorption. Because the spunlace fabric experiences greater tension in the longitudinal direction during padding and washing, it shrinks in the transverse direction, resulting in a narrower width. When the modified spunlace fabric is stretched, set, and dried, if the fabric width is set too narrow, the modified spunlace fabric will expand and deform laterally after absorbing water. When the width of the modified spunlace fabric after setting is the same as the width of the original spunlace fabric, the lateral expansion and deformation of the modified spunlace fabric after absorbing water is smaller, and the dimensions are more stable. As the width of the modified spunlace fabric after setting continues to increase, the spunlace fabric will break at the edges, and the structure of the spunlace fabric will be damaged, resulting in poor dimensional stability of the modified spunlace fabric after absorbing water. Therefore, when stretching, setting, and drying the modified spunlace fabric, the width between the needle holes on the fabric surface is preferably 0.95 to 1.05 times the width of the spunlace fabric prepared in step (2).

[0082] Samples a and c prepared in Example 3 were cut and shaped according to the same face-shaped mold to produce two types of mask base fabrics (face-shaped samples). The natural hanging effect (with local support) of the two mask base fabrics after water absorption saturation is as follows. Figure 2 As shown, the effect of hanging the two types of face masks by hand after the base fabric has absorbed water to saturation (simulating the application process) is as follows: Figure 3 As shown. From Figure 2 and Figure 3 It can be seen that both mask base fabrics have a high water absorption capacity, and both can form a thick gel after absorbing water, with similar gelation effects. However, the face shape made from sample a has poor dimensional stability after water absorption, especially the eye and mouth areas, which swell and deform severely, failing to meet the usage requirements; the face shape made from sample c has better dimensional stability after water absorption, meeting the requirements for mask application.

[0083] Example 4

[0084] (1) Weigh 18 kg of calcium alginate fiber (linear density 1.8 dtex) and 82 kg of Tencel fiber (linear density 1.12 dtex) respectively, physically mix the two fibers, and then open and comb them to obtain a uniformly mixed fiber web; (2) Feed the fiber web into a web laying machine for full cross-laying, then use high-pressure water jet for puncture reinforcement, dry, and roll to obtain a single-layer spunlace fabric with a basis weight of 22 g / m². 2 The thickness is 0.20 mm and the width is 1800 mm. Then, the spunlace fabric is modified in the following three ways: (a) The prepared spunlace fabric is rolled and wound on a warp beam. The warp beam with the spunlace fabric is pushed into the warp beam cylinder, and a sodium chloride aqueous solution with a concentration of 60 g / L is injected for modification treatment. The ratio of the number of internal and external circulations of the sodium chloride aqueous solution in the warp beam cylinder is 5 / 5. The solution temperature is 50℃ and the modification treatment time is 15 min to obtain modified sample A; (b) The prepared spunlace fabric is rolled and wound on a warp beam. The warp beam with the spunlace fabric is pushed into the warp beam cylinder, and a 15% ethanol aqueous solution is injected, according to the sodium chloride solution Sodium chloride was added to the warp beam with a concentration of 60 g / L. The ratio of the number of times the sodium chloride solution circulated inside and outside the warp beam cylinder was 5 / 5. The solution temperature was 50℃ and the modification treatment time was 15 min, resulting in modified sample B. (c) The spunlace fabric was first impregnated with a sodium chloride aqueous solution with a concentration of 60 g / L, then uniformly rolled dry, and then rolled and wound onto the warp beam. The warp beam with the spunlace fabric wound was pushed into the warp beam cylinder, and a mixed solution of ethanol and water with a mass percentage concentration of 15% was injected for modification treatment. The ratio of the number of times the solution circulated inside and outside the warp beam cylinder was 5 / 5. The solution temperature was 50℃ and the modification treatment time was 15 min, resulting in modified sample C.

[0085] The spunlace fabrics modified in the above three different ways were subjected to the same subsequent treatment as follows: the spunlace fabrics modified in the warp were rolled dry, and then immersed in a mixed solution of ethanol and water with a mass percentage concentration of 50% to remove the residual inorganic salts in the spunlace fabrics. The rolling pressure was 0.3 MPa. The spunlace fabrics after rolling and washing were stretched, set and dried. The width between the needle holes on the fabric surface was set to 1.00 times the width of the spunlace fabrics prepared in step (2). The oven temperature was 60℃ and the machine speed was 45 m / min. The dried fabrics were then cut, inspected and rolled to obtain three kinds of water-absorbing gelled spunlace fabrics.

[0086] Example 4 mainly studies the effect of warp beam modification process on the performance of the prepared water-absorbing gelled spunlace fabric. Samples were taken from the head (outer layer of the warp beam) and tail (inner layer of the warp beam) of the three types of prepared water-absorbing gelled spunlace fabrics, respectively. The water absorption, transverse and longitudinal breaking strength, and transverse and longitudinal dimensional change rate of the samples were tested using the method of Example 1. The results are shown in Table 4.

[0087] As can be seen from Table 4: (1) Sample A, which was directly modified by sodium chloride aqueous solution (method (a)), had poor water absorption and gel performance. This was mainly because the sodium alginate fibers generated in the spunlace fabric were washed away and dissolved into the solution during the modification process, resulting in fewer components in the spunlace fabric that could absorb water and form gel. (2) Sample B, which was directly modified by sodium chloride ethanol / water solution (method (b)), had significantly improved water absorption and gel performance compared to Sample A, but the difference between the head and tail of the sample was large. This was mainly because the modified solution entered from the inside of the warp and first came into contact with the inner layer of the spunlace fabric (the tail of the sample), and reacted fully with the inner layer of the fabric. Therefore, the water absorption and gel performance and liquid absorption of the inner layer of the fabric were better. The warp had a large number of fabric layers, and when the modified solution gradually penetrated and diffused to the outer layer of the warp, its concentration decreased significantly, resulting in insufficient modification of the outer layer of the spunlace fabric (the head of the sample). Therefore, the water absorption and gel performance and liquid absorption of the outer layer of the fabric were poor. (3) Sample C prepared by the process of the present invention can solve the problem of head-to-tail difference between the inner and outer layers of the warp beam, and the various properties of the prepared water-absorbing gelled spunlace fabric meet the purpose of the present invention.

[0088] Table 4. Properties of the three spunlace fabrics prepared in Example 4

[0089]

[0090] Example 5

[0091] (1) Weigh 20 kg of calcium alginate fiber (linear density 1.5 dtex) and 80 kg of Tencel fiber (linear density 1.33 dtex) respectively, physically mix the two fibers, and then open and comb them to obtain a uniformly mixed fiber web; (2) Feed the fiber web into a web laying machine for full cross-laying, reinforce it with high-pressure water jet puncture, dry it, and roll it up to obtain a single-layer spunlace nonwoven fabric with a basis weight of 25 g / m². 2The thickness is 0.22 mm and the width is 1800 mm; (3) The spunlace fabric is first soaked in a sodium chloride aqueous solution with a concentration of 80 g / L, then uniformly rolled dry, and then rolled and wound on the warp beam; (4) The warp beam wound with ultra-light thin spunlace fabric is pushed into the warp beam cylinder, and a mixed solution of ethanol and water with a mass percentage concentration of 18% is injected for modification treatment. The ratio of the number of times the solution circulates inside and outside the warp beam cylinder is 7 / 3, the solution temperature is 45℃, and the modification treatment time is 25 min; (5) The warp beam is then rolled into the warp beam cylinder. After the spunlace fabric was modified in the shaft, it was spun dry and then soaked in a mixed solution of ethanol and water with a mass percentage concentration of 50% to remove the residual inorganic salts in the spunlace fabric. The spunlace pressure was 0.4 MPa. (6) The spunlace fabric after spun washing was stretched, fixed and dried. The width between the needle holes on the fabric surface was set to 1.00 times the width of the spunlace fabric prepared in step (2). The oven temperature was 65℃ and the speed was 48 m / min. After drying, the fabric was cut, inspected and rolled to obtain the water-absorbing gelled spunlace fabric.

[0092] The spunlace fabric prepared in step (2) (sample 1#), the water-absorbing gelled spunlace fabric prepared in step (6) (sample 2#), and the commercially available seaweed fiber spunlace fabric (seaweed fiber content of 30%, fabric weight of 30 g / m²) were compared. 2 Three types of mask base fabrics (referred to as sample 3#) were cut and shaped according to the same face shape mold to make three types of mask base fabrics (face shape samples). The performance of the three types of mask base fabrics was simulated and tested. The specific method is as follows.

[0093] Evaporation rate test: (1) Weigh the sample of the mask base fabric to be tested and record it as m0 (g). (2) Soak the weighed mask base fabric sample in 50mL of distilled water for 3min, take it out and hang it in the air for 1min until no liquid drips, weigh it and record it as M (g). (3) Lay the weighed wet sample flat on a constant temperature glass plate (temperature is 37℃±3℃), start timing at the same time, peel the sample off the glass plate after 5min, weigh it and record it as m. t (g). (4) After weighing, continue to spread the sample flat on the constant temperature glass plate, and repeat the above operation every 5 minutes. Calculate the evaporation rate F (%) of the sample according to formula (3). Test five samples for each type of sample and take the average value.

[0094]

[0095] Hydration Test: Referring to literature, this experiment used top-grain cowhide to simulate human facial skin and multiple layers of filter paper to simulate the absorption layer of the face. A saturated mask base was applied to the surface of the top-grain cowhide to simulate the hydration process of the mask (test model see...). Figure 4(1) Lay 6 layers of filter paper in a glass petri dish, then cut a 6cm diameter circle of top-grain cowhide and lay it on the filter paper. Name the combination of glass petri dish, filter paper, and top-grain cowhide as simulated skin, and weigh it, recording it as A0 (g). (2) Weigh the mask base fabric to be tested, recording it as M (g); cut a 5cm diameter circular sample from the mask base fabric, weigh it, and record it as m (g). (3) Soak the weighed sample in 15mL of distilled water for 3 minutes, then remove it and hang it in the air for 1 minute until no liquid drips; then lay the sample flat on the top-grain cowhide and start timing at the same time. (4) After applying the sample for 5 minutes, peel off the top-grain cowhide from the sample, then weigh the simulated skin, recording it as A. t (g); After weighing, the sample is applied to the simulated skin again, and the above operation is repeated every 5 minutes. The amount of water replenished L (g) of the sample for different application times is calculated according to formula (4). Five samples are tested for each type of sample, and the average value is taken.

[0096]

[0097] Adsorption performance test of heavy metals: (1) Weigh 15.36g CdSO4·8 / 3H2O and 15.78g NiSO4·6H2O, add them to 500mL of distilled water respectively to prepare aqueous solutions, and then add 12.6g agar powder respectively, and stir to dissolve at 100℃. When the above solution cools down to about 60℃, quickly pour it into a petri dish and let it cool and solidify naturally to simulate skin tissue containing heavy metals. (2) Weigh the sample of the mask base cloth (face shape) to be tested and record it as M (g). (3) Soak the weighed mask base cloth (face shape) in 50mL of distilled water for 3min, take it out and hang it in the air for 1min until no liquid drips; then apply the mask base cloth to the above-mentioned Cd-containing 2+ Ni 2+ The agar surface was adhered for 40 minutes and then peeled off (see model). Figure 5 (3) The Cd absorbed 2 + Ni 2+ The mask base fabric was ashed and acidified, then water was added to a 50mL volumetric flask to make up the volume. Another 5mL of the solution was then diluted to 50mL. The Cd content in the mask was measured using ICP single-channel scanning inductively coupled plasma atomic emission spectrometry. 2+ Ni 2+ Content C 金属 (mg / L). The ability of the mask base fabric to adsorb heavy metals is measured by the amount of heavy metals it adsorbs. The greater the adsorption amount, the better the performance of the mask base fabric in adsorbing heavy metals. The amount of heavy metals adsorbed by the mask base fabric, G (mg / g), is calculated according to formula (5).

[0098]

[0099] The above method was used to test the spunlace fabric prepared in step (2) (sample 1#), the water-absorbing gelled spunlace fabric prepared in step (6) (sample 2#), and the commercially available seaweed fiber spunlace fabric (seaweed fiber content of 30%, fabric weight of 30 g / m²). 2 The evaporation rate, water replenishment, and heavy metal adsorption performance of the face mask made from sample 3# are shown in the figure. Figure 6 , Figure 7 and Figure 8 .

[0100] from Figure 6 It can be seen that the evaporation rates of the unmodified spunlace fabric (1#) and the commercially available seaweed fiber spunlace fabric (3#) are relatively high. When the application time is 25 minutes, the evaporation rate of the mask base fabric reaches 100%, meaning that the water on the mask base fabric has completely evaporated. This is because the mask base fabrics 1# and 3# cannot form a gel in distilled water, resulting in a small amount of liquid on the mask base fabric. Moreover, this liquid is physically adsorbed onto the mask base fabric and is easily evaporated and lost. In contrast, the water-absorbing gelled spunlace fabric (2#) prepared in this invention forms a gel in distilled water, resulting in a higher water content on the mask base fabric. Furthermore, this water exists on the mask base fabric in the form of a gel, and the water molecules and fiber molecules have strong hydrogen bonding interactions, hindering the evaporation of water molecules. Figure 7 It can be seen that the mask base fabric and the mask made from the water-absorbing gelled spunlace fabric prepared by the present invention can be applied for 40 minutes. At this time, the evaporation rate is still less than 45%, and the mask base fabric remains moist. Therefore, the application time can exceed 40 minutes, and it has a long-lasting moisturizing effect.

[0101] from Figure 7It can be seen that the water replenishment of the mask base fabrics made from unmodified spunlace fabric (1#) and commercially available seaweed fiber spunlace fabric (3#) showed a trend of first increasing and then decreasing with the extension of application time, with the maximum water replenishment at 10 minutes. This is because the water content in the 1# and 3# mask base fabrics gradually decreases with the extension of application time. When the application time is ≥15 minutes, the water content in the mask base fabric is actually lower than that in simulated skin, causing the mask base fabric to absorb moisture from the skin, resulting in a decrease in water replenishment. Therefore, the application time of ordinary mask base fabrics is controlled at 10-15 minutes. However, the water-absorbing gelled spunlace fabric (2#) prepared in this invention forms a gel in distilled water, with a water absorption of ≥40.0 g / g. Moreover, the water molecules and fiber molecules have strong hydrogen bonding, making it difficult to evaporate and lose water. Therefore, the water replenishment of the 2# mask base fabric increases with the extension of time, and the water replenishment reaches equilibrium at about 40 minutes of application. Therefore, the mask base fabric and the mask made from the water-absorbing gelled spunlace fabric prepared by the present invention can be applied for up to 40 minutes, and the moisturizing effect is significantly better than that of ordinary non-gel beauty and skin care mask products.

[0102] Because some inferior cosmetics contain heavy metals, long-term use of these products can lead to excessive levels of heavy metals in the skin, affecting skin quality and even overall health. Heavy metals in cosmetics include arsenic, cadmium, lead, nickel, and mercury. This project selected cadmium (Cd). 2+ Ni 2+ Using two heavy metal ions as representatives, the above method was used to conduct simulation experiments to test the spunlace fabric prepared in step (2) (sample 1#), the water-absorbing gelled spunlace fabric prepared in step (6) (sample 2#), and the commercially available seaweed fiber spunlace fabric (seaweed fiber content of 30%, fabric weight of 30g / m²). 2 The adsorption performance of three types of mask base fabrics (sample 3#, etc.) on heavy metal ions in the skin was measured, and the results are shown in the figure. Figure 8 .from Figure 8 It can be seen that all three types of mask base fabrics can absorb heavy metal ions. This is because the chemical structure of seaweed fiber contains -COO. - It can form chelate structures with heavy metal ions, adsorbing and capturing the heavy metals into the fiber molecular structure. However, the absorption performance of heavy metal ions by the #2 mask base fabric is significantly better than that of #1 and #3. This is due to the partial -COO content in the chemical structure of the seaweed fiber in the #1 and #3 spunlace fabrics. - The Ca 2+ Chelation, resulting in —COO that can chelate with heavy metal ions. - The reduced quantity leads to a decrease in the adsorption performance of heavy metal ions in the base fabrics of masks #1 and #3. The -COO atoms in the seaweed fiber chemical structure of the water-absorbing gelled spunlace fabric prepared in this invention... -All of them exist in an ionized state, therefore the mask base fabric and the mask made from it have a strong ability to adsorb heavy metal ions.

[0103] The spunlace fabric prepared in step (2) (sample 1#) and the water-absorbing gelled spunlace fabric prepared in step (6) (sample 2#) were cut into a size of 110mm*40mm to make a rapid cooling and fever-reducing patch. The cooling performance was tested and compared with a commercially available fever-reducing patch (sample 3#). The specific test method for cooling performance is as follows: (1) Place the cut-to-size rapid cooling and fever-reducing patches (sample 1# and sample 2#) in 10mL of distilled water and soak them naturally for 3 minutes. After taking them out, hang them in the air for 1 minute until no liquid drips. (2) Apply the rapid cooling and fever-reducing patches (sample 1# and sample 2#) after step (1) to the volunteer's head (the commercially available fever-reducing patch (sample 3#) is applied directly to the volunteer's head without the pretreatment in step (1)), and start timing. (3) After applying for 5 minutes, remove the fever-reducing patch and use an infrared thermometer to test the temperature of the volunteer's head. Test 5 locations and take the average value. (4) After the temperature measurement is completed, reapply the fever-reducing patch to the volunteer's head. (5) Repeat the above steps and test the temperature of the volunteer's head every 5 minutes. Test 5 locations each time and take the average value.

[0104] Using the above method, the cooling performance of fever-reducing patches made from the spunlace fabric prepared in step (2) (sample 1#) and the water-absorbing gelled spunlace fabric prepared in step (6) (sample 2#) and commercially available fever-reducing patches (sample 3#) was tested. The results are shown in the figure. Figure 9 .from Figure 9It can be seen that, both the fever-reducing patch made of the water-absorbing gelled spunlace fabric provided by this invention (sample 2#) and the commercially available fever-reducing patch (sample 3#) showed a uniform and gradual decrease in head temperature with prolonged application time. However, the rate of temperature decrease for volunteers using sample 2# was significantly greater than that for volunteers using sample 3#. When the application time reached 35 minutes, the head temperature of volunteers using sample 2# decreased from an initial 36.5℃ to 34.4℃, a reduction of 2.1℃; while the head temperature of volunteers using sample 3# decreased from an initial 36.5℃ to 35.2℃, a reduction of 1.3℃. This is because the fever-reducing patch uses a physical cooling mechanism, where the evaporation of moisture from the patch removes heat from the body surface, achieving a cooling and calming effect. The water-absorbing gelled spunlace fabric provided by this invention has a water absorption capacity far exceeding that of commercially available fever-reducing patches. Therefore, fever-reducing patches made from this water-absorbing gelled spunlace fabric have a rapid cooling and fever-reducing effect, which is significantly superior to that of commercially available fever-reducing patches. However, as the application time increased, the cooling rate of the head decreased and gradually reached equilibrium in volunteers using samples #2 and #3 of the fever-reducing patch products. This is because as time goes on, the water content in the fever-reducing patch gradually decreases, and the temperature of the fever-reducing patch and the head temperature tend to be the same; if the application time is further extended, the user's head temperature will gradually rise, and the fever-reducing patch will lose its cooling and fever-reducing effect. Immersing the fever-reducing patch made from the water-absorbing gelled spunlace fabric provided by this invention in water can quickly absorb water, restore its fever-reducing effect, and allow for reuse; while commercially available fever-reducing patches are basically single-use products and cannot be reused. Volunteers who applied the fever-reducing patch made of unmodified spunlace fabric (sample 1#) experienced a head temperature reduction of 0.4°C from an initial 36.5°C to 36.1°C within 15 minutes, indicating a cooling effect, but it was not significant. As time progressed, the volunteers' head temperature gradually returned to normal body temperature. This is because sample 1# did not absorb water to form a gel and had a low water content; as the application time increased, the moisture content in the product gradually decreased, resulting in a loss of cooling effect.

Claims

1. A water-absorbing gelled spunlace fabric, characterized in that: The water-absorbing gelled spunlace fabric is obtained by warp beam processing, and before the warp beam processing, the spunlace fabric is first impregnated with a sodium chloride aqueous solution with a concentration of 40-100 g / L. The spunlace fabric, after being impregnated with sodium chloride aqueous solution, is rolled and wound onto a warp beam, and then undergoes a modification treatment in a warp beam cylinder. The water-absorbing gelized spunlace fabric has a single-layer mesh structure, a grammage of 20-25 g / m 2 , a thickness of 0.12-0.25 mm, a transverse breaking strength of ≥40.0 N / 5 cm, a longitudinal breaking strength of ≥35.0 N / 5 cm, and a water absorption of ≥40.0 g / g; The transverse and longitudinal dimensional changes of the water-absorbing gelled spunlace fabric after water absorption are both ≤4.5%; The water-absorbing gelled spunlace fabric is prepared using the following process: A spunlace fabric with a single-layer mesh structure is made by using calcium alginate fiber and Tencel fiber for full cross-laying and hydroentanglement reinforcement. Of which, by mass percentage, the content of calcium alginate fiber is 15%–20%, and the linear density is 1.5–2.0 dtex; the content of Tencel fiber is 80%–85%, and the linear density is 0.90–1.33 dtex. The spunlace fabric is impregnated with a sodium chloride aqueous solution of 40-100 g / L, and then modified by the warp beam process to obtain the modified spunlace fabric. The warp beam process is in which the mixed solution flows through the small holes of the hollow warp beam on the spunlace fabric under the action of a circulating pump, and the flow is reversed at regular intervals, while the spunlace fabric remains stationary. In the process of shaft cutting, the injected solution is a mixed solution of ethanol and water with a mass percentage concentration of 10% to 20%, the solution temperature is 20 to 60 ℃, and the modification treatment time is 10 to 30 min. The modified spunlace fabric was impregnated and cleaned to obtain a cleaned modified spunlace fabric. The cleaning solution used for immersion and padding is a mixed solution of ethanol and water with a mass percentage concentration of 40% to 80%. The washed and modified spunlace fabric was dried using a stretching and setting process to obtain a water-absorbing and gelled spunlace fabric. Among them, the width between the needle holes of the stenter fabric in the stenter process is 0.95 to 1.05 times the width of the spunlace fabric with a single-layer mesh structure.

2. A method for preparing a water-absorbing gelled spunlace fabric as described in claim 1, characterized in that, Includes the following steps: (1) Weigh calcium alginate fiber and supporting fiber, mix, open and comb to obtain a mixed fiber web; (2) The fiber web is fed into the web laying machine for full cross-laying, and high-pressure water jet is used for puncture reinforcement to obtain a spunlace fabric with a mesh structure; (3) The spunlace fabric is impregnated with a sodium chloride aqueous solution with a concentration of 40-100 g / L, then dried by a rolling mill, and then rolled and wound onto a warp beam; (4) Push the warp beam wrapped with spunlace fabric into the warp beam cylinder, inject the solution, and carry out the modification treatment; (5) Roll dry the spunlace fabric after the warp modification treatment, and then immerse it in the cleaning solution; (6) The spunlace fabric after being impregnated with the cleaning solution is stretched, fixed and dried to obtain a water-absorbing and gelled spunlace fabric.

3. A method for preparing a water-absorbing gelled spunlace fabric as described in claim 2, characterized in that: The solution described in step (4) is a mixture of ethanol and water with a mass percentage concentration of 10% to 20%, the solution temperature is 20 to 60 °C, and the modification treatment time is 10 to 30 min.

4. A method for preparing a water-absorbing gelled spunlace fabric as described in claim 3, characterized in that: During the modification process described in step (4), the solution in the shaft cylinder flows in both internal and external circulation directions.

5. A method for preparing a water-absorbing gelled spunlace fabric as described in claim 4, characterized in that: The cleaning solution used in step (5) is a mixed solution of ethanol and water with a mass percentage concentration of 40% to 80%.

6. A method for preparing a water-absorbing gelled spunlace fabric as described in claim 5, characterized in that: In step (6), the width between the needle holes of the stenter fabric is 0.95 to 1.05 times the width of the spunlace fabric prepared in step (2). The oven temperature of the stenter is 50 to 70 ℃ and the speed of the stenter is 40 to 50 m / min.

7. A water-absorbing gelled face mask, characterized in that... The spunlace fabric is made using the water-absorbing gelled spunlace fabric as described in claim 1, or is obtained by the method for preparing water-absorbing gelled spunlace fabric as described in any one of claims 2-6.

8. A rapid cooling and fever-reducing patch, characterized in that... The spunlace fabric is made using the water-absorbing gelled spunlace fabric as described in claim 1, or is obtained by the method for preparing water-absorbing gelled spunlace fabric as described in any one of claims 2-6.

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