Preparation method of high-elastic non-woven fabric and mask

Abstract

The application belongs to the field of new materials, and discloses a preparation method of high-elastic non-woven fabric, which comprises the following steps: step 1: drying PBT chips and PA6 chips, and then adding the PBT chips and the PA6 chips into screw extruders respectively for melt extrusion; step 2: inputting the melted PBT and PA6 melt into a spinning assembly for spinning to form a fibrous melt; step 3: cooling the melt by cold air, and laying the cooled fibers on a screen curtain for laying operation; step 4: water-jetting the fabric layer obtained after the laying operation; and step 5: drying and rolling the water-jetted fabric layer; the mass ratio of the PBT chips to the PA6 chips is 69-72:28-31. The non-woven fabric prepared by the method is randomly interwoven, and the pores are in an irregular and uneven state. Such a structure not only can provide good adhesion, so that the pulling force can act on every inch of skin, but also can improve the holding capacity of high cosmetic active ingredients and the skin care effect of the mask. Meanwhile, the application also discloses a mask.

Description

Technical Field

[0001] This invention relates to the field of new materials, and in particular to a method for preparing a high-elasticity nonwoven fabric and a face mask. Background Technology

[0002] The applicant filed a design patent application in 2018, application number 201830129431.7; the mask provides localized reinforcement in specific areas of the face to facilitate more effective application of skincare products to those areas. The reinforced areas are made of ordinary non-woven fabric.

[0003] During the research and development process, we hope that this product will have a better skin lifting effect and improve the retention of effective ingredients.

[0004] The following patent technologies can be found in related patent applications that have lifting effects:

[0005] The patent application with publication number CN119408255A is for a non-irritating, lifting and firming facial mask cloth, its preparation method and application, which uses an elastic middle layer of PU fiber material to achieve a lifting effect.

[0006] The patent application with publication number CN118390245A is for a plant fiber composite facial mask cloth and its preparation method. It utilizes the heat shrinkage property of strong fibers to achieve a lifting effect.

[0007] All of the above methods achieve the lifting effect through the material's own elasticity or thermal shrinkage properties.

[0008] The main research focus of this project is on how to improve the lifting properties of nonwoven fabrics and their retention properties for active ingredients in cosmetics. Summary of the Invention

[0009] The purpose of this invention is to provide a method for preparing a high-elasticity nonwoven fabric. This method uses PBT (polyester) as the main component and PA6 (nylon) as the secondary component. PBT plays a role in strengthening the fabric, while PA6 provides elasticity. Furthermore, this invention does not perform hot pressing after web formation; instead, it uses a hydroentangling process to replace hot pressing. This results in a nonwoven fabric with randomly interwoven fibers and irregular, uneven pore shapes. This structure not only provides excellent fit, allowing the lifting force to reach every inch of skin, but also enhances the retention capacity of cosmetic active ingredients, thereby improving the skincare effect of the mask.

[0010] In addition, the present invention also discloses a face mask.

[0011] To achieve the above objectives, this application discloses:

[0012] A method for preparing a high-elasticity nonwoven fabric includes the following steps:

[0013] Step 1: Dry the PBT and PA6 chips, and then melt-extrude them separately into a screw extruder.

[0014] Step 2: The molten PBT and PA6 melt is fed into the spinning assembly for spinning to form a fibrous melt;

[0015] Step 3: Cool the melt with cold air, and then lay the cooled fibers flat on the mesh screen for the mesh laying operation;

[0016] Step 4: Perform hydroentangling on the fabric layer obtained after laying the net;

[0017] Step 5: Dry and roll up the hydroentangled fabric layer;

[0018] The mass ratio of the PBT slices to the PA6 slices is 69–72:28–31.

[0019] In the above preparation method, the temperatures of each zone of the screw extruder used to extrude PA6 are as follows: Zone 1: 230℃~240℃, Zone 2: 240℃~250℃, Zone 3: 250℃~260℃, Zone 4: 260℃~270℃, and Zone 5: 270℃~280℃.

[0020] In the above preparation method, the temperatures of each zone of the screw extruder used for extruding PBT are as follows: Zone 1: 230℃~250℃, Zone 2: 250℃~260℃, Zone 3: 260℃~280℃, Zone 4: 270℃~280℃, and Zone 5: 270℃~280℃.

[0021] In the above preparation method, the process parameters for hydroentangling are: hydroentangling pressure of 50-60 MPa, hydroentangling pore size of 80-100 μm, and hydroentangling density of 20 strands / cm. 2 .

[0022] In the above preparation method, after the web laying operation, the density of the obtained fabric layer is 50 g / m³. 2 .

[0023] In the above preparation method, the mass ratio of the PBT slices to the PA6 slices is 70.4-71:29-29.6.

[0024] In the above preparation method, the drying temperature in step 1 is 120-130°C.

[0025] Meanwhile, the present invention also discloses a face mask with lifting effect, including a base film and a pearl-patterned spunlace nonwoven fabric; the pearl-patterned spunlace nonwoven fabric is connected to the base film by an ultrasonic welding process; the pearl-patterned spunlace nonwoven fabric is connected to a portion of the base film;

[0026] The base film is prepared by any of the preparation methods described above.

[0027] In the aforementioned face mask, the base film has a first region corresponding to the apple cheek of a person's face, a second region corresponding to the area around the eyes of a person's face, a third region corresponding to the forehead of a person's face, and a fourth region corresponding to the nasolabial folds of a person's face; the pearl-patterned spunlace nonwoven fabric is distributed in at least one of the first, second, third, and fourth regions of the base film.

[0028] In the aforementioned face mask, the second region and the third region form an integral region, which is the fifth region; the pearl-patterned spunlace nonwoven fabric is distributed in at least one of the first region and the fifth region of the base film.

[0029] This application has at least the following beneficial effects:

[0030] This invention achieves high strength and high elasticity through a reasonable blend of PA6 and PBT. By using web-laying and hydroentangling processes, irregular pores and irregular fiber interlacing can be provided. These pores and interlacing can improve the skin-fitting ability of the nonwoven fabric. Combined with the high elasticity of the nonwoven fabric, it can improve the skin lifting effect. The pore characteristics can improve the retention of active ingredients in cosmetics. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the mask of the present invention;

[0032] Figure 2 This is a 50x electron microscope image of Embodiment 1 of the present invention;

[0033] Figure 3 This is a 200x electron microscope image of Embodiment 1 of the present invention;

[0034] Figure 4 This is a 300x electron microscope image of Embodiment 1 of the present invention;

[0035] Figure 5 This is a 50x electron microscope image of commercially available nonwoven fabric;

[0036] Figure 6 This is a 200x electron microscope image of commercially available nonwoven fabric;

[0037] Figure 7 This is a 300x electron microscope image of commercially available nonwoven fabric;

[0038] Figure 8 This is a micropressure distribution diagram of the side face of the basement membrane;

[0039] Figure 9 This is a micro-pressure distribution diagram on the side of the face using mask 1;

[0040] Figure 10 This is a micropressure distribution diagram of the front face of the basement membrane;

[0041] Figure 11 This is a micro-pressure distribution diagram of the front of the face using mask 1. Detailed Implementation

[0042] The present invention will now be clearly and completely described in conjunction with embodiments thereof. It should be noted that, unless otherwise specified in the embodiments, conditions are performed under conventional conditions or conditions recommended by the manufacturer. Reagents or instruments whose manufacturers are not specified are all commercially available products. Unless otherwise specified, all parts used in the embodiments of the present invention are parts by weight.

[0043] Example 1

[0044] A method for preparing a high-elasticity nonwoven fabric includes the following steps:

[0045] Step 1: Dry 70.8 parts of PBT chips and 29.2 parts of PA6 chips at a drying temperature of 130℃, and then melt-extrude them separately in a screw extruder.

[0046] The temperatures of each zone of the screw extruder used for extruding PA6 are as follows: Zone 1: 230℃~240℃, Zone 2: 240℃~250℃, Zone 3: 250℃~260℃, Zone 4: 260℃~270℃, and Zone 5: 270℃~280℃.

[0047] The temperatures of each zone of the screw extruder used for extruding PBT are as follows: Zone 1: 230℃~250℃, Zone 2: 250℃~260℃, Zone 3: 260℃~280℃, Zone 4: 270℃~280℃, and Zone 5: 270℃~280℃.

[0048] The extruded PBT melt enters the main chamber, and the PA6 melt enters the auxiliary chamber. The main chamber and the auxiliary chamber are connected to the spinning assembly.

[0049] Step 2: The molten PBT and PA6 melt is fed into the spinning assembly for spinning to form a fibrous melt;

[0050] The spinning assembly is used to prepare the melt into fibers with a fineness of about 1 dtex; the fibers are then air-cooled and shaped.

[0051] Step 3: After cooling, the fibers are laid flat on the mesh curtain for the mesh laying operation;

[0052] When laying the mesh, the thickness of the mesh should be controlled according to the specification of 50g per square meter;

[0053] Step 4: Perform hydroentangling on the fabric layer obtained after laying the net;

[0054] The hydroentangling pressure is 50 MPa, the hydroentangling pore size is 100 μm, and the hydroentangling density is 20 times / cm. 2

[0055] Step 5: Dry and roll up the hydroentangled fabric layer.

[0056] Example 2

[0057] A method for preparing a high-elasticity nonwoven fabric includes the following steps:

[0058] Step 1: Dry 69 PBT chips and 31 PA6 chips at 120°C, and then melt-extrude them separately in a screw extruder.

[0059] The temperatures of each zone of the screw extruder used for extruding PA6 are as follows: Zone 1: 230℃~240℃, Zone 2: 240℃~250℃, Zone 3: 250℃~260℃, Zone 4: 260℃~270℃, and Zone 5: 270℃~280℃.

[0060] The temperatures of each zone of the screw extruder used for extruding PBT are as follows: Zone 1: 230℃~250℃, Zone 2: 250℃~260℃, Zone 3: 260℃~280℃, Zone 4: 270℃~280℃, and Zone 5: 270℃~280℃.

[0061] The extruded PBT melt enters the main chamber, and the PA6 melt enters the auxiliary chamber. The main chamber and the auxiliary chamber are connected to the spinning assembly.

[0062] Step 2: The molten PBT and PA6 melt is fed into the spinning assembly for spinning to form a fibrous melt;

[0063] The spinning assembly is used to prepare the melt into fibers with a fineness of about 1 dtex; the fibers are then air-cooled and shaped.

[0064] Step 3: After cooling, the fibers are laid flat on the mesh curtain for the mesh laying operation;

[0065] When laying the mesh, the thickness of the mesh should be controlled according to the specification of 50g per square meter;

[0066] Step 4: Perform hydroentangling on the fabric layer obtained after laying the net;

[0067] The hydroentangling pressure is 55 MPa, the hydroentangling pore size is 90 μm, and the hydroentangling density is 20 times / cm³. 2

[0068] Step 5: Dry and roll up the hydroentangled fabric layer.

[0069] Example 3

[0070] A method for preparing a high-elasticity nonwoven fabric includes the following steps:

[0071] Step 1: Dry 72 PBT chips and 28 PA6 chips at 120℃, and then melt-extrude them separately in a screw extruder.

[0072] The temperatures of each zone of the screw extruder used for extruding PA6 are as follows: Zone 1: 230℃~240℃, Zone 2: 240℃~250℃, Zone 3: 250℃~260℃, Zone 4: 260℃~270℃, and Zone 5: 270℃~280℃.

[0073] The temperatures of each zone of the screw extruder used for extruding PBT are as follows: Zone 1: 230℃~250℃, Zone 2: 250℃~260℃, Zone 3: 260℃~280℃, Zone 4: 270℃~280℃, and Zone 5: 270℃~280℃.

[0074] The extruded PBT melt enters the main chamber, and the PA6 melt enters the auxiliary chamber. The main chamber and the auxiliary chamber are connected to the spinning assembly.

[0075] Step 2: The molten PBT and PA6 melt is fed into the spinning assembly for spinning to form a fibrous melt;

[0076] The spinning assembly is used to prepare the melt into fibers with a fineness of about 1 dtex; the fibers are then air-cooled and shaped.

[0077] Step 3: After cooling, the fibers are laid flat on the mesh curtain for the mesh laying operation;

[0078] When laying the mesh, the thickness of the mesh should be controlled according to the specification of 50g per square meter;

[0079] Step 4: Perform hydroentangling on the fabric layer obtained after laying the net;

[0080] The hydroentangling pressure is 55 MPa, the hydroentangling pore size is 90 μm, and the hydroentangling density is 20 times / cm³. 2

[0081] Step 5: Dry and roll up the hydroentangled fabric layer.

[0082] Comparative Example 1

[0083] A method for preparing a high-elasticity nonwoven fabric includes the following steps:

[0084] Step 1: Dry 70.8 parts of PBT chips and 29.2 parts of PA6 chips at a drying temperature of 130℃, and then melt-extrude them separately in a screw extruder.

[0085] The temperatures of each zone of the screw extruder used for extruding PA6 are as follows: Zone 1: 230℃~240℃, Zone 2: 240℃~250℃, Zone 3: 250℃~260℃, Zone 4: 260℃~270℃, and Zone 5: 270℃~280℃.

[0086] The temperatures of each zone of the screw extruder used for extruding PBT are as follows: Zone 1: 230℃~250℃, Zone 2: 250℃~260℃, Zone 3: 260℃~280℃, Zone 4: 270℃~280℃, and Zone 5: 270℃~280℃.

[0087] The extruded PBT melt enters the main chamber, and the PA6 melt enters the auxiliary chamber. The main chamber and the auxiliary chamber are connected to the spinning assembly.

[0088] Step 2: The molten PBT and PA6 melt is fed into the spinning assembly for spinning to form a fibrous melt;

[0089] The spinning assembly is used to prepare the melt into fibers with a fineness of about 1 dtex; the fibers are then air-cooled and shaped.

[0090] Step 3: After cooling, the fibers are laid flat on the mesh curtain for the mesh laying operation;

[0091] When laying the mesh, the thickness of the mesh should be controlled according to the specification of 50g per square meter;

[0092] Step 4: The fabric layer obtained after web laying is heated and melted in a hot rolling mill and then hot rolled into shape;

[0093] Step 5: Dry and roll up the hot-rolled fabric layer.

[0094] The nonwoven fabrics of Examples 1 to 3 and Comparative Example 1 were used as base films to prepare face masks.

[0095] refer to Figure 1 The mask is a lifting mask, comprising a base film 1 and a pearl-patterned spunlace nonwoven fabric 2. The pearl-patterned spunlace nonwoven fabric 2 is connected to the base film 1 via ultrasonic welding; the welding position is shown as dotted line A in the figure. The pearl-patterned spunlace nonwoven fabric 2 is connected to a portion of the base film 1; in this embodiment, this portion is the area where the cheekbones are changed to nasolabial folds, forming a crescent shape, and also covers the forehead and the area around the eyes. The specifications of the pearl-patterned spunlace nonwoven fabric are 50g / m². 2 .

[0096] Lifting effect experiment

[0097] Experimental sample:

[0098] 1. Membrane fabric: The nonwoven fabric base membrane of Examples 1 to 3 and Comparative Example 1 above;

[0099] 2. Essence: Prepare samples according to the formula and process in Table 1;

[0100] Table 1. Serum Formula and Process

[0101]

[0102] 3. Face mask: The essence is injected into the non-woven fabric base film of Examples 1 to 3 and Comparative Example 1. Face mask 1 to face mask 4 correspond to Examples 1 to 3 and Comparative Example 1, respectively.

[0103] Evaluation method:

[0104] Twenty participants were recruited and given the prepared facial mask product for trial. After trial, satisfaction with the product was evaluated based on three dimensions: facial lifting effect, hydration, and breathability. Satisfaction was categorized into five levels, from dissatisfied to very satisfied, corresponding to scores of 1 to 5. Finally, the average scores from the 20 participants across each dimension were calculated to quantitatively evaluate the product performance.

[0105] Evaluation results:

[0106] The evaluation results of the 20 subjects are summarized in Table 2 below:

[0107] Table 2 Subject assessment results

[0108] sample Facial lifting effect Moisturizing properties breathability Face mask 1 5 5 5 Face mask 2 5 4 5 Face mask 3 5 5 4 Face mask 4 3 3 2

[0109] The above experiments show that using PBT and PA6 chips with a mass ratio of 69-72:28-31 to prepare fibers and then performing hydroentangling can improve the lifting, water retention, and breathability of the mask. The results of the water retention effect indirectly prove that the nonwoven fabric of the present invention has significant advantages in maintaining and sustaining the effective ingredients of cosmetics.

[0110] Electron microscopy tests were performed on the nonwoven fabric of Example 1 and commercially available nonwoven fabrics. The test results are shown below. Figures 2 to 7 ;

[0111] Figure 2 This is a 50x electron microscope image of Embodiment 1 of the present invention;

[0112] Figure 3 This is a 200x electron microscope image of Embodiment 1 of the present invention;

[0113] Figure 4 This is a 300x electron microscope image of Embodiment 1 of the present invention;

[0114] Figure 5 This is a 50x electron microscope image of commercially available nonwoven fabric;

[0115] Figure 6 This is a 200x electron microscope image of commercially available nonwoven fabric;

[0116] Figure 7 This is a 300x electron microscope image of commercially available nonwoven fabric;

[0117] pass Figures 2 to 7 As can be seen, the nonwoven fabric of the present invention has the following characteristics:

[0118] Fiber arrangement: The fibers are arranged in a random interwoven state. This structure gives the mask fabric better flexibility and fit, and can better adapt to the complex contours of the face.

[0119] Pore ​​structure: The pores are irregular in size and shape, and this complex pore structure is beneficial for the storage of the serum.

[0120] Fiber thickness: The fibers vary in thickness, with some fibers being coarser and others finer. This mixed fiber structure helps to form a multi-level porous structure, thereby improving the mask sheet's ability to absorb and retain the essence.

[0121] Commercially available nonwoven fabrics have the following characteristics:

[0122] Fiber arrangement: Tight fiber arrangement is not conducive to the formation of a porous structure, which is not conducive to the storage of essence.

[0123] Pore ​​structure: The pores are not regular enough, which is not conducive to the storage of the essence.

[0124] Fiber thickness: Slightly less uniform fiber thickness results in slightly poorer absorption and release of the essence. Coarser fibers may make the mask sheet stiffer.

[0125] Furthermore, using simulation software from universities, we also simulated the micro-pressure distribution on the face of the base membrane and the face mask 1 of this invention. This simulation mainly considers the stress distribution of the facial skin under the pressure of the self-weight of single-layer and double-layer mask fabrics when the human body is lying flat. To avoid interference from irrelevant factors, the stress on the facial skin caused by the weight of the human head is not considered, therefore the weight of the human head is not taken into account in the simulation.

[0126] The specific simulation method is as follows: First, the face model of the shell is converted into a solid three-dimensional model (STP format), imported into Abaqus software, material parameters are set, assembly is performed, and analysis and calculation are carried out using the static general analysis module.

[0127] Results can be referenced. Figures 8 to 11 ;

[0128] Figure 8 This is a micropressure distribution diagram of the side face of the basement membrane;

[0129] Figure 9 This is a micro-pressure distribution diagram on the side of the face using mask 1;

[0130] Figure 10 This is a micropressure distribution diagram of the front face of the basement membrane;

[0131] Figure 11 This is a micro-pressure distribution diagram of the front of the face using mask 1.

[0132] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description; thus, all changes falling within the meaning and scope of the claims are intended to be embraced within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A facial mask with lifting effect, characterized in that, It includes a base film and a pearl-patterned spunlace nonwoven fabric; the pearl-patterned spunlace nonwoven fabric is connected to the base film by an ultrasonic welding process; the pearl-patterned spunlace nonwoven fabric is connected to a portion of the base film; The method for preparing the base film includes the following steps: Step 1: Dry the PBT and PA6 chips, and then melt-extrude them separately into a screw extruder. Step 2: The molten PBT and PA6 melt is fed into the spinning assembly for spinning to form a fibrous melt; Step 3: Cool the melt with cold air, and then lay the cooled fibers flat on the mesh screen for the mesh laying operation; Step 4: Perform hydroentangling on the fabric layer obtained after laying the net; Step 5: Dry and roll up the hydroentangled fabric layer; The mass ratio of the PBT slices to the PA6 slices is 69~72:28~31.

2. The facial mask according to claim 1, characterized in that, The temperatures of each zone of the screw extruder used for extruding PA6 are as follows: Zone 1: 230℃~240℃, Zone 2: 240℃~250℃, Zone 3: 250℃~260℃, Zone 4: 260℃~270℃, and Zone 5: 270℃~280℃.

3. The facial mask according to claim 1, characterized in that, The temperatures of each zone of the screw extruder used for extruding PBT are as follows: Zone 1: 230℃~250℃, Zone 2: 250℃~260℃, Zone 3: 260℃~280℃, Zone 4: 270℃~280℃, and Zone 5: 270℃~280℃.

4. The facial mask according to claim 1, characterized in that, The process parameters for hydroentangling are as follows: hydroentangling pressure 50~60MPa, hydroentangling pore size 80~100μm, and hydroentangling density 20 times / cm. 2 .

5. The facial mask according to claim 1, characterized in that, After the web laying operation, the density of the resulting fabric layer is 50 g / m². 2 .

6. The facial mask according to claim 1, characterized in that, The mass ratio of the PBT slices to the PA6 slices is 70.4~71:29~29.

6.

7. The facial mask according to claim 1, characterized in that, The drying temperature in step 1 is 120~130℃.

8. The facial mask according to claim 1, characterized in that, The basement membrane has a first region corresponding to the apple cheek of a person's face, a second region corresponding to the area around the eyes of a person's face, a third region corresponding to the forehead of a person's face, and a fourth region corresponding to the nasolabial folds of a person's face. The pearl-textured spunlace nonwoven fabric is distributed in at least one of the first, second, third, and fourth regions of the base film.

9. The facial mask according to claim 8, characterized in that, The second and third regions form an integral region, which is the fifth region; the pearl-textured spunlace nonwoven fabric is distributed in at least one of the first and fifth regions of the base film.

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