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

Abstract

The invention belongs to the field of new materials, and discloses a preparation method of a high-elastic non-woven fabric, which comprises the following steps: step 1, drying PBT (Polybutylene Terephthalate) slices and PA6 (Polyamide 6) slices, and respectively adding the PBT slices and the PA6 slices into a screw extruder for melt extrusion after the PBT slices and the PA6 slices are dried; 2, the molten PBT and PA6 melt is input into a spinning assembly for spinning, and a fibrous melt is formed; 3, the melt is cooled through cold air, and the cooled fibers are flatly laid on a web curtain to be subjected to web laying operation; 4, spunlace is conducted on the cloth layer obtained after net laying; step 5, drying and rolling the spunlaced cloth layer; the mass ratio of the PBT slices to the PA6 slices is (69-72): (28-31). According to the non-woven fabric prepared by the method, fibers are randomly interwoven, pores are in a state of irregular and non-uniform shape, and the structure not only can provide good fitness and enable lifting force to act on each inch of skin, but also can improve the holding capacity of cosmetic active ingredients and improve the skin care effect of a mask. Meanwhile, the invention further discloses a facial mask.

Description

Technical Field

[0001] The present invention relates to the field of new materials, and in particular to a preparation method of a high-elastic non-woven fabric and a facial mask. Background Art

[0002] The applicant filed a design patent application in 2018, application number 201830129431.7. The mask features local reinforcements at specific locations on the face to facilitate more effective action of the skincare product. The local reinforcements in this solution are made of ordinary non-woven fabric.

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

[0004] Among the patent applications related to lifting effects, the following patent technologies can be found:

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

[0006] The publication number is CN118390245A, and the subject is a patent application for a plant fiber composite facial mask cloth and its preparation method. It uses the property of strong fiber shrinking when heated to achieve a lifting effect.

[0007] The above solutions all achieve the lifting effect by utilizing the material's own elasticity or thermal shrinkage characteristics.

[0008] The main research object of this project is: how to improve the lifting performance of non-woven fabrics and their holding performance for cosmetic active ingredients. Summary of the Invention

[0009] The purpose of the present invention is to provide a method for preparing a highly elastic non-woven fabric, which uses PBT (polyester) as a main component and PA6 (nylon) as a secondary component, wherein PBT plays a role in enhancing strength and PA6 plays a role in providing elasticity. At the same time, the present invention does not perform hot pressing after laying the net, but uses a hydroentanglement process instead of hot pressing, so that the non-woven fabric molding fibers are randomly interwoven and the pore shape is irregular and uneven. This structure can not only provide good fit and enable the lifting force to act on every inch of the skin, but also can improve the holding capacity of higher cosmetic active ingredients and improve the skin care effect of the facial mask.

[0010] At the same time, the invention also discloses a facial mask.

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

[0012] A method for preparing a high-elastic non-woven fabric comprises the following steps:

[0013] Step 1: Dry the PBT chips and PA6 chips, and then add them into the screw extruder for melt extrusion;

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

[0015] Step 3: Cool the melt with cold air, and the cooled fibers are laid flat on the mesh curtain for laying;

[0016] Step 4: hydroentangle the fabric layer obtained after laying the net;

[0017] Step 5: Dry and roll up the spunlace 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: 230°C to 240°C in the first zone, 240°C to 250°C in the second zone, 250°C to 260°C in the third zone, 260°C to 270°C in the fourth zone, and 270°C to 280°C in the fifth zone.

[0020] In the above preparation method, the temperatures of each zone of the screw extruder used to extrude PBT are: 230°C to 250°C in the first zone, 250°C to 260°C in the second zone, 260°C to 280°C in the third zone, 270°C to 280°C in the fourth zone, and 270°C to 280°C in the fifth zone.

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

[0022] In the above-mentioned preparation method, after the laying operation, the density of the obtained cloth layer is 50g / m 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] At the same time, the present invention also discloses a facial mask with a lifting effect, comprising a base film and a pearl-patterned spunlace non-woven fabric; the pearl-patterned spunlace non-woven fabric is connected to the base film through an ultrasonic welding process; the pearl-patterned spunlace non-woven fabric is connected to a part of the base film;

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

[0027] In the above-mentioned facial mask, the base membrane has a first area corresponding to the apple muscles of a person's face, a second area corresponding to the area around the eyes of a person's face, a third area corresponding to the forehead of a person's face, and a fourth area corresponding to the nasolabial folds of a person; the pearl-patterned spunlace non-woven fabric is distributed in at least one of the first area, the second area, the third area, and the fourth area of the base membrane.

[0028] In the above-mentioned facial mask, the second area and the third area form an integral area, which is the fifth area; the pearl pattern spunlace non-woven fabric is distributed in at least one of the first area and the fifth area of the base film.

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

[0030] The present invention can achieve the purpose of high strength and high elasticity by compounding PA6 and PBT in a reasonable proportion. Through the laying and hydroentanglement process, irregular pores and irregular fiber interlacing can be provided. Such pores and interlacing can improve the skin-adhering ability of the non-woven fabric. Combined with the high elasticity of the non-woven fabric, the skin-lifting effect can be improved. The pore characteristics can improve the ability to hold the active ingredients of cosmetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the facial mask of the present invention;

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

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

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

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

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

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

[0038] Figure 8 is the micro-pressure distribution diagram of the lateral face of the basement membrane;

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

[0040] Figure 10 This is the micro-pressure distribution map of the front face of the basement membrane;

[0041] Figure 11 This is the micro-pressure distribution diagram of the front face of mask 1. DETAILED DESCRIPTION

[0042] Below in conjunction with embodiments of the present invention, the present invention is clearly and completely described, in description of the present invention, it should be noted that, in the embodiment, the unrecited specific conditions person, carry out according to the condition of normal condition or manufacturer's suggestion. Reagents therefor or instrument are not recited manufacturer person, are the conventional products that can be obtained by commercial purchase. When not making special instructions, used part in the embodiments of the present invention is all weight part.

[0043] Example 1

[0044] A method for preparing a high-elastic non-woven fabric comprises the following steps:

[0045] Step 1: Dry 70.8 parts of PBT chips and 29.2 parts of PA6 chips at 130°C, and then add them into a screw extruder for melt extrusion.

[0046] The temperatures of each zone of the screw extruder used to extrude PA6 are: 230℃~240℃ for the first zone, 240℃~250℃ for the second zone, 250℃~260℃ for the third zone, 260℃~270℃ for the fourth zone, and 270℃~280℃ for the fifth zone.

[0047] The temperatures of each zone of the screw extruder used to extrude PBT are: 230℃~250℃ for the first zone, 250℃~260℃ for the second zone, 260℃~280℃ for the third zone, 270℃~280℃ for the fourth zone, and 270℃~280℃ for the fifth zone.

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

[0049] Step 2: The molten PBT and PA6 melts are 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 formed by air cooling;

[0051] Step 3: The cooled fibers are laid flat on the mesh curtain for laying;

[0052] When laying the net, the thickness of the net is controlled at 50g per square meter;

[0053] Step 4: hydroentangle the fabric layer obtained after laying the net;

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

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

[0056] Example 2

[0057] A method for preparing a high-elastic non-woven fabric comprises the following steps:

[0058] Step 1: Dry 69 parts of PBT chips and 31 parts of PA6 chips at 120°C, and then add them into a screw extruder for melt extrusion.

[0059] The temperatures of each zone of the screw extruder used to extrude PA6 are: 230℃~240℃ for the first zone, 240℃~250℃ for the second zone, 250℃~260℃ for the third zone, 260℃~270℃ for the fourth zone, and 270℃~280℃ for the fifth zone.

[0060] The temperatures of each zone of the screw extruder used to extrude PBT are: 230℃~250℃ for the first zone, 250℃~260℃ for the second zone, 260℃~280℃ for the third zone, 270℃~280℃ for the fourth zone, and 270℃~280℃ for the fifth zone.

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

[0062] Step 2: The molten PBT and PA6 melts are 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 formed by air cooling;

[0064] Step 3: The cooled fibers are laid flat on the mesh curtain for laying;

[0065] When laying the net, the thickness of the net is controlled at 50g per square meter;

[0066] Step 4: hydroentangle the fabric layer obtained after laying the net;

[0067] The hydroentanglement pressure is 55MPa, the hydroentanglement aperture is 90μm, and the hydroentanglement density is 20 times / cm 2

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

[0069] Example 3

[0070] A method for preparing a high-elastic non-woven fabric comprises the following steps:

[0071] Step 1: Dry 72 parts of PBT chips and 28 parts of PA6 chips at 120°C, and then add them into a screw extruder for melt extrusion.

[0072] The temperatures of each zone of the screw extruder used to extrude PA6 are: 230℃~240℃ for the first zone, 240℃~250℃ for the second zone, 250℃~260℃ for the third zone, 260℃~270℃ for the fourth zone, and 270℃~280℃ for the fifth zone.

[0073] The temperatures of each zone of the screw extruder used to extrude PBT are: 230℃~250℃ for the first zone, 250℃~260℃ for the second zone, 260℃~280℃ for the third zone, 270℃~280℃ for the fourth zone, and 270℃~280℃ for the fifth zone.

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

[0075] Step 2: The molten PBT and PA6 melts are 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 formed by air cooling;

[0077] Step 3: The cooled fibers are laid flat on the mesh curtain for laying;

[0078] When laying the net, the thickness of the net is controlled at 50g per square meter;

[0079] Step 4: hydroentangle the fabric layer obtained after laying the net;

[0080] The hydroentanglement pressure is 55MPa, the hydroentanglement aperture is 90μm, and the hydroentanglement density is 20 times / cm 2

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

[0082] Comparative Example 1

[0083] A method for preparing a high-elastic non-woven fabric comprises the following steps:

[0084] Step 1: Dry 70.8 parts of PBT chips and 29.2 parts of PA6 chips at 130°C, and then add them into a screw extruder for melt extrusion.

[0085] The temperatures of each zone of the screw extruder used to extrude PA6 are: 230℃~240℃ for the first zone, 240℃~250℃ for the second zone, 250℃~260℃ for the third zone, 260℃~270℃ for the fourth zone, and 270℃~280℃ for the fifth zone.

[0086] The temperatures of each zone of the screw extruder used to extrude PBT are: 230℃~250℃ for the first zone, 250℃~260℃ for the second zone, 260℃~280℃ for the third zone, 270℃~280℃ for the fourth zone, and 270℃~280℃ for the fifth zone.

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

[0088] Step 2: The molten PBT and PA6 melts are 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 formed by air cooling;

[0090] Step 3: The cooled fibers are laid flat on the mesh curtain for laying;

[0091] When laying the net, the thickness of the net is controlled at 50g per square meter;

[0092] Step 4: The fabric layer obtained after laying the mesh is heated and melted in a hot rolling mill and hot rolled to form the fabric;

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

[0094] The non-woven fabrics of Examples 1 to 3 and Comparative Example 1 were used as base films to prepare facial masks.

[0095] refer to Figure 1 The mask has a lifting function and includes 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 by the 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, the portion is the location where the apple muscles on both sides are replaced by nasolabial folds, which are crescent-shaped and cover the forehead and the area around the eyes. The specification of the pearl-patterned spunlace nonwoven fabric is 50g / m 2 .

[0096] Lifting effect experiment

[0097] Experimental samples:

[0098] 1. Membrane cloth: the non-woven base membrane of Examples 1 to 3 and Comparative Example 1 above;

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

[0100] Table 1 Essence formula and process

[0101]

[0102] 3. Facial mask: Inject the essence into the non-woven fabric base films of Examples 1 to 3 and Comparative Example 1. Masks 1 to 4 correspond to Examples 1 to 3 and Comparative Example 1, respectively.

[0103] Evaluation Methodology:

[0104] Twenty subjects were recruited and given a face mask product for trial. After the trial, they were asked to rate their satisfaction based on three dimensions: lifting effect, hydration, and breathability. Satisfaction was categorized on a scale of 1 to 5, ranging from dissatisfied to very satisfied. Finally, the average of the 20 subjects' scores on each dimension was calculated to quantitatively assess product performance.

[0105] Evaluation results:

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

[0107] Table 2 Subject evaluation results

[0108] sample Face lifting effect Hydration Breathability Mask 1 5 5 5 Mask 2 5 4 5 Mask 3 5 5 4 Mask 4 3 3 2

[0109] The above experiments show that using PBT chips and PA6 chips with a mass ratio of 69-72:28-31 to prepare fibers and then hydroentangle them can improve the lifting effect, water retention effect and breathability effect of the facial mask; the results of the water retention effect can indirectly prove that the non-woven fabric of the present invention has significant advantages in retaining and sustained-release of effective ingredients in cosmetics.

[0110] The nonwoven fabric of Example 1 and commercially available nonwoven fabric were tested by electron microscope, and the test results showed that Figures 2 to 7 ;

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

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

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

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

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

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

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

[0118] Fiber arrangement: The fiber arrangement is randomly interwoven. This structure gives the mask cloth better flexibility and fit, allowing it to better adapt to the complex contours of the face.

[0119] Pore structure: The pore size and shape are irregular. This complex pore structure is conducive to the storage of essence.

[0120] Fiber thickness: Fiber thickness varies, with some fibers being thicker and others being thinner. This mixed fiber structure helps create a multi-level pore structure, thereby improving the mask's ability to absorb and retain essence.

[0121] Commercially available non-woven fabrics have the following characteristics:

[0122] Fiber arrangement: The fibers are tightly arranged, which is not conducive to forming a porous structure and 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 essence.

[0124] Fiber thickness: The fiber thickness is slightly uneven, which results in poor absorption and release of essence. The fiber is thicker, and the mask may be stiffer.

[0125] Furthermore, using university simulation software, we simulated the micro-pressure distribution on the face of the base film and mask 1 of the present invention. This simulation primarily considered the stress distribution on the facial skin under the weight of single-layer and double-layer mask fabrics when the person is lying flat. To minimize interference from irrelevant factors, the stress on the facial skin caused by the weight of the head was not considered 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 the abaqus software, the material parameters are set, the assembly is performed, and the statics general analysis module is used for analysis and calculation.

[0127] The results can be referred to Figures 8 to 11 ;

[0128] Figure 8 is the micro-pressure distribution diagram of the lateral face of the basement membrane;

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

[0130] Figure 10 This is the micro-pressure distribution diagram of the front face of the basement membrane;

[0131] Figure 11 This is the micro-pressure distribution diagram of the front face of 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 embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and it is intended that equivalents falling within the claims be included. All variations within the meaning and scope of the elements are encompassed by the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for preparing a high-elastic non-woven fabric, characterized in that: The steps include: Step 1: Dry the PBT chips and PA6 chips, and then add them into the screw extruder for melt extrusion; Step 2: The molten PBT and PA6 melts are fed into the spinning assembly for spinning to form a fibrous melt; Step 3: Cool the melt with cold air, and the cooled fibers are laid flat on the mesh curtain for laying; Step 4: hydroentangle the fabric layer obtained after laying the net; Step 5: Dry and roll up the spunlace fabric layer; The mass ratio of the PBT slices to the PA6 slices is 69-72:28-31.

2. The preparation method according to claim 1, characterized in that The temperatures of each zone of the screw extruder used to extrude PA6 are: 230℃~240℃ for the first zone, 240℃~250℃ for the second zone, 250℃~260℃ for the third zone, 260℃~270℃ for the fourth zone, and 270℃~280℃ for the fifth zone.

3. The preparation method according to claim 1, characterized in that The temperatures of each zone of the screw extruder used to extrude PBT are: 230℃~250℃ for the first zone, 250℃~260℃ for the second zone, 260℃~280℃ for the third zone, 270℃~280℃ for the fourth zone, and 270℃~280℃ for the fifth zone.

4. The preparation method according to claim 1, characterized in that The process parameters of the spunlace are: spunlace pressure of 50-60 MPa, spunlace pore size of 80-100 μm, and spunlace density of 20 times / cm 2 .

5. The preparation method according to claim 1, characterized in that After the laying operation, the density of the obtained cloth layer is 50g / m 2 .

6. The preparation method 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 preparation method according to claim 1, characterized in that The drying temperature in step 1 is 120-130°C.

8. 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 through an ultrasonic welding process; the pearl-patterned spunlace nonwoven fabric is connected to a part of the base film; The base film is prepared by the preparation method according to any one of claims 1 to 7.

9. The facial mask according to claim 8, characterized in that The basement membrane has a first area corresponding to the apple muscles of a person's face, a second area corresponding to the area around the eyes of the person's face, a third area corresponding to the forehead of the person's face, and a fourth area corresponding to the nasolabial folds of the person's face; The pearl pattern spunlace non-woven fabric is distributed in at least one of the first area, the second area, the third area and the fourth area of the base film.

10. The facial mask according to claim 8, characterized in that The second area and the third area form an integral area, which is the fifth area; the pearl pattern spunlace non-woven fabric is distributed in at least one of the first area and the fifth area of the base film.

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