A method for preparing sodium alginate multilayer composite facial mask nonwoven fabric

Abstract

The invention discloses a method for preparing a sodium alginate multilayer composite mask non-woven fabric, comprising the steps of: firstly preparing a sodium alginate film fabric, a base fabric and a bottom fabric respectively, then paving the base fabric, the sodium alginate film fabric and the bottom fabric in this order, and feeding the fabric into a spunlace machine for spunlace reinforcement to obtain a composite non-woven wet fabric, drying the sodium alginate multilayer composite non-woven wet fabric, removing water remaining in the sodium alginate multilayer composite non-woven wet fabric to obtain a composite non-woven fabric, spraying a soaking liquid onto the composite non-woven fabric for further drying to obtain a sodium alginate multilayer composite non-woven fabric, slitting the sodium alginate multilayer composite non-woven fabric by a slitting machine, and then rolling up and collecting the slit sodium alginate multilayer composite non-woven fabric by a winding machine; a mask prepared by the sodium alginate multilayer composite non-woven fabric prepared by the method contains sodium alginate substance, and utilizing the characteristics of sodium alginate to have a good repairing and therapeutic effect on skin, and can effectively improve the elasticity and firmness of the skin.

Description

Technical Field

[0001] The invention belongs to the technical field of facial mask nonwoven fabric preparation, and specifically relates to a method for preparing a sodium alginate multilayer composite facial mask nonwoven fabric. Background Art

[0002] Non-woven masks are a type of patch masks, which use non-woven fabrics as the carrier of essence. Most popular non-woven masks on the market are 30g-70g thick blended non-woven fabrics, mainly pure cotton non-woven fabrics and Tencel non-woven fabrics. They are more close to the skin and improve the weak point of patch masks. At present, when preparing non-woven fabrics for masks, due to the high bacterial content of non-woven fabrics, they are usually sterilized first, and then antibacterial agents are added to the non-woven fabrics to improve the tingling sensation when applying non-woven masks.

[0003] After searching, the Chinese patent document application number is 201710701178.2, which discloses a method for preparing a preservative-free non-woven mask. The invention uses polyester fiber, modified chitosan fiber and modified seaweed fiber as the non-woven mask substrate, and a softener composed of glycerol ether quaternary ammonium salt softener and diester quaternary ammonium salt softener in a mass ratio of 2:3 and an anti-allergic agent composed of wild chrysanthemum cellulose and dipotassium glycyrrhizinate in a mass ratio of 4:1 to prepare the non-woven mask, and irradiate sterilize under the conditions of normal temperature and pressure, oxidizing gas medium and low radiation absorption dose. The technical advantages of the invention are: the non-woven mask of the invention has high hygroscopicity, air permeability and low irritation. Irradiation sterilization of the non-woven mask can effectively reduce the reproduction of the strain, which is beneficial to the preservation of the non-woven mask, while avoiding the potential harm of preservatives to human skin.

[0004] However, this method still has the following defects:

[0005] The facial mask nonwoven fabric has no obvious skin repair effect after being applied to the human face, and the skin's firmness and elasticity cannot be significantly improved. Therefore, we need to propose a preparation method of a sodium alginate multilayer composite facial mask nonwoven fabric to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a method for preparing a sodium alginate multi-layer composite mask non-woven fabric. The mask prepared from the sodium alginate multi-layer composite non-woven fabric prepared by the method contains sodium alginate substance. Utilizing the characteristics of sodium alginate, it has a good repairing and therapeutic effect on the skin, and can effectively improve the elasticity and firmness of the skin, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A method for preparing a sodium alginate multilayer composite facial mask nonwoven fabric comprises the following steps:

[0009] S1. Preparation of sodium alginate membrane cloth, using sodium alginate, deionized water, glycerol and NaOH solution as raw materials to prepare a soaking solution, then adding silk into the soaking solution and soaking for 10-12 hours and then drying, and using the soaked silk to knit into a sodium alginate membrane cloth with air permeability;

[0010] S2, the production of the base fabric, using artificial fiber silk as raw material to weave into a 3D three-dimensional mesh base fabric through a warp knitting machine;

[0011] S3, the production of the bottom layer fabric, using polypropylene pellets as raw materials, through high temperature melting, spinning, laying, hot pressing and winding continuous one-step production to form the bottom layer fabric;

[0012] S4, stacking the base fabric, the sodium alginate membrane fabric and the bottom fabric in order, and sending them to a spunlace machine for spunlace reinforcement to obtain a composite non-woven wet fabric;

[0013] S5, drying the sodium alginate multilayer composite non-woven wet fabric to remove the water remaining in the sodium alginate multilayer composite non-woven wet fabric to obtain a composite non-woven fabric,

[0014] S6, spraying the soaking liquid onto the composite non-woven fabric and drying it again to obtain a sodium alginate multilayer composite non-woven fabric;

[0015] S7, using a slitting machine to slit the sodium alginate multilayer composite nonwoven fabric, and then using a winder to roll up and collect the slit sodium alginate multilayer composite nonwoven fabric.

[0016] Preferably, the soaking solution comprises the following raw materials by mass: 50-60 parts of sodium alginate, 20-25 parts of deionized water, 20-25 parts of glycerol, and 10-30 parts of NaOH solution.

[0017] Preferably, the preparation of the soaking solution comprises the following steps:

[0018] A1. Add sodium alginate into deionized water according to the mass ratio and stir to obtain a first mixed solution;

[0019] A2, adding glycerol to the first mixed solution and continuing to stir and mix to obtain a second mixed solution;

[0020] A3. Add NaOH solution to the second mixed solution in multiple steps and stir and mix. The pH value of the mixed solution needs to be tested each time the NaOH solution is added, so that the mixed solution is adjusted to an alkaline solution with a pH value between 8 and 9, which is the soaking solution.

[0021] Preferably, the base fabric and the bottom fabric both have a grammage of 10-18 gsm, and the sodium alginate membrane fabric has a grammage of 20-32 gsm.

[0022] Preferably, the base fabric is produced by the following steps:

[0023] B1. A double-needle-bed high-speed warp knitting machine is used for knitting, wherein the double-needle-bed high-speed warp knitting machine is provided with at least six comb bars, and the six comb bars are provided with a ground comb bar GB1, a ground comb bar GB2, a ground comb bar GB3, a ground comb bar GB4, a ground comb bar GB5 and a ground comb bar GB6 in sequence from the front needle bed to the rear needle bed;

[0024] B2, threading the yarn on the double needle bed high-speed warp knitting machine in a six-thread and three-empty or one-thread and two-empty manner through the ground comb bar GB1, threading the yarn on the double needle bed high-speed warp knitting machine in a one-thread and one-empty manner through the ground comb bar GB2, threading the yarn on the double needle bed high-speed warp knitting machine in a full-thread manner through the ground comb bar GB3, threading the yarn on the double needle bed high-speed warp knitting machine in a one-thread and one-empty manner through the ground comb bar GB4, threading the yarn on the double needle bed high-speed warp knitting machine in a two-thread and one-empty manner through the ground comb bar GB5, and threading the yarn on the double needle bed high-speed warp knitting machine in a two-thread and one-empty manner through the ground comb bar GB6;

[0025] B3, ground comb bars GB1 and GB2 pad yarn on the front needle bed and use a changed warp satin structure to form an openwork jacquard layer, ground comb bars GB3 and GB4 alternately pad yarn on the front needle bed and the rear needle bed and use a changed warp knitting structure to form an openwork layer, and ground comb bars GB5 and GB6 pad yarn on the rear needle bed and use a changed warp knitting structure to form an openwork base layer;

[0026] B4 and ground comb bar GB3 perform loop forming knitting on the front needle bed, and ground comb bar GB3 performs loop forming knitting on the rear needle bed.

[0027] Preferably, the preparation of the bottom layer fabric comprises the following steps:

[0028] C1. The polypropylene pellets are melt-blended in an extruder, and then transported to an extruder for melting. The obtained melt is sprayed out through a spinneret at 210-230°C and evenly spread into a fiber web to obtain a non-woven base fabric, wherein the high-temperature hot air flow rate of the spinneret is 600-700m / s;

[0029] C2, mixing the plant fiber with water to obtain a slurry;

[0030] C3. Soak the non-woven fabric in the slurry for 40-60 minutes, and heat-press the non-woven fabric soaked with the slurry to obtain the bottom layer fabric.

[0031] Preferably, the widths of the base fabric, sodium alginate film fabric and bottom fabric layer are the same, and when stacking, the sodium alginate film fabric is first evenly laid on the base fabric, and then the base fabric layer is laid on the sodium alginate film fabric, so that the edges of the base fabric, sodium alginate film fabric and bottom fabric layer are aligned, and then the stacked fabric is sent to a spunlace machine for spunlace reinforcement.

[0032] Preferably, the water entanglement machine includes a water entanglement head, and the water entanglement head includes a collecting cavity, a screw is rotatably installed inside the collecting cavity, one end of the screw passes through the side wall of the collecting cavity and a driving motor is installed, the screw is threadedly connected to a mounting seat with an arc-shaped upper end, and a plurality of groups of water entanglement needle groups are equidistantly installed on the upper end of the mounting seat, each group of the water entanglement needle groups is correspondingly provided with a control valve, one end of the plurality of control valves is connected to a source through a water pump, the lower end of the mounting seat is slidably connected to the inner bottom of the collecting cavity, a water entanglement port is opened at the upper end of the collecting cavity, and two baffles are obliquely provided on both sides of the water entanglement port.

[0033] Preferably, a collecting box is installed at the lower end of the collecting cavity, a collecting port connected to the collecting cavity is opened at the upper end of the collecting box, and a drain pipe with a solenoid valve is connected to one side of the collecting cavity.

[0034] Preferably, a sliding block is fixed to the lower end of the mounting seat, and a sliding groove for sliding the sliding block is provided at the inner bottom of the collecting cavity, and the sliding direction of the sliding groove is the same as the installation direction of the screw rod.

[0035] The method for preparing a sodium alginate multilayer composite facial mask nonwoven fabric proposed by the present invention has the following advantages compared with the prior art:

[0036] The present invention mainly prepares sodium alginate film cloth, base cloth and bottom cloth respectively, and then stacks the base cloth, sodium alginate film cloth and bottom cloth in order, and sends them to a spunlace machine for spunlace reinforcement to obtain a composite non-woven wet cloth, dries the sodium alginate multi-layer composite non-woven wet cloth, removes the water remaining in the sodium alginate multi-layer composite non-woven wet cloth to obtain a composite non-woven fabric, sprays the soaking liquid onto the composite non-woven fabric for further drying to obtain a sodium alginate multi-layer composite non-woven fabric, cuts the sodium alginate multi-layer composite non-woven fabric by a slitting machine, and then uses a winder to roll up and collect the cut sodium alginate multi-layer composite non-woven fabric. The facial mask prepared by the sodium alginate multi-layer composite non-woven fabric prepared by the method contains sodium alginate substance, and the characteristics of sodium alginate are used to have a good repair and treatment effect on the skin, and can effectively improve the elasticity and firmness of the skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a flowchart of the present invention;

[0038] Figure 2 The flowchart of the soaking solution preparation process of the present invention is as follows;

[0039] Figure 3 A flowchart of the bottom cloth preparation process of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of the water jet head of the present invention.

[0041] In the figure: 1. collecting chamber; 2. baffle; 3. mounting seat; 4. screw; 5. driving motor; 6. collecting port; 7. collecting box; 8. drain pipe; 9. slider; 10. water spurting needle group; 11. control valve; 12. water spurting port. DETAILED DESCRIPTION

[0042] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] Example 1

[0044] The present invention provides Figure 1-4 The method for preparing a sodium alginate multilayer composite mask nonwoven fabric comprises the following steps:

[0045] S1. Preparation of sodium alginate membrane cloth, using sodium alginate, deionized water, glycerol and NaOH solution as raw materials to prepare a soaking solution, then adding silk into the soaking solution and soaking for 10-12 hours and then drying, and using the soaked silk to knit into a sodium alginate membrane cloth with air permeability;

[0046] The soaking solution includes the following raw materials by mass: 50 parts of sodium alginate, 20 parts of deionized water, 20 parts of glycerol, and 10 parts of NaOH solution.

[0047] The preparation of the soaking solution comprises the following steps:

[0048] A1. Add sodium alginate into deionized water according to the mass ratio and stir to obtain a first mixed solution;

[0049] A2, adding glycerol to the first mixed solution and continuing to stir and mix to obtain a second mixed solution;

[0050] A3. Add NaOH solution to the second mixed solution in multiple steps and stir and mix. The pH value of the mixed solution needs to be tested each time the NaOH solution is added, so that the mixed solution is adjusted to an alkaline solution with a pH value between 8 and 9, which is the soaking solution.

[0051] S2, the production of the base fabric, using artificial fiber silk as raw material to weave into a 3D three-dimensional mesh base fabric through a warp knitting machine;

[0052] The base fabric is produced by the following steps:

[0053] B1. A double-needle-bed high-speed warp knitting machine is used for knitting, wherein the double-needle-bed high-speed warp knitting machine is provided with at least six comb bars, and the six comb bars are provided with a ground comb bar GB1, a ground comb bar GB2, a ground comb bar GB3, a ground comb bar GB4, a ground comb bar GB5 and a ground comb bar GB6 in sequence from the front needle bed to the rear needle bed;

[0054] B2, threading the yarn on the double needle bed high-speed warp knitting machine in a six-thread and three-empty or one-thread and two-empty manner through the ground comb bar GB1, threading the yarn on the double needle bed high-speed warp knitting machine in a one-thread and one-empty manner through the ground comb bar GB2, threading the yarn on the double needle bed high-speed warp knitting machine in a full-thread manner through the ground comb bar GB3, threading the yarn on the double needle bed high-speed warp knitting machine in a one-thread and one-empty manner through the ground comb bar GB4, threading the yarn on the double needle bed high-speed warp knitting machine in a two-thread and one-empty manner through the ground comb bar GB5, and threading the yarn on the double needle bed high-speed warp knitting machine in a two-thread and one-empty manner through the ground comb bar GB6;

[0055] B3, ground comb bars GB1 and GB2 pad yarn on the front needle bed and use a changed warp satin structure to form an openwork jacquard layer, ground comb bars GB3 and GB4 alternately pad yarn on the front needle bed and the rear needle bed and use a changed warp knitting structure to form an openwork layer, and ground comb bars GB5 and GB6 pad yarn on the rear needle bed and use a changed warp knitting structure to form an openwork base layer;

[0056] B4 and ground comb bar GB3 perform loop forming knitting on the front needle bed, and ground comb bar GB3 performs loop forming knitting on the rear needle bed.

[0057] S3, the production of the bottom layer fabric, using polypropylene pellets as raw materials, through high temperature melting, spinning, laying, hot pressing and winding continuous one-step production to form the bottom layer fabric;

[0058] The production of the bottom layer fabric comprises the following steps:

[0059] C1. The polypropylene pellets are melt-blended in an extruder, and then transported to an extruder for melting. The obtained melt is sprayed out through a spinneret at 210-230°C and evenly spread into a fiber web to obtain a non-woven base fabric, wherein the high-temperature hot air flow rate of the spinneret is 600-700m / s;

[0060] C2, mixing the plant fiber with water to obtain a slurry;

[0061] C3. Soak the non-woven fabric in the slurry for 40-60 minutes, and heat-press the non-woven fabric soaked with the slurry to obtain the bottom layer fabric.

[0062] S4, stacking the base fabric, the sodium alginate membrane fabric and the bottom fabric in order, and sending them to a spunlace machine for spunlace reinforcement to obtain a composite non-woven wet fabric;

[0063] The base fabric and the bottom fabric both have a grammage of 10-18 gsm, and the sodium alginate film fabric has a grammage of 20-32 gsm.

[0064] The widths of the base fabric, sodium alginate film fabric and bottom fabric layer are all the same, and when stacking, the sodium alginate film fabric is first evenly laid on the base fabric, and then the base fabric layer is laid on the sodium alginate film fabric, so that the edges of the base fabric, sodium alginate film fabric and bottom fabric layer are aligned, and then the stacked fabric is sent to a spunlace machine for spunlace reinforcement.

[0065] The hydroentanglement machine comprises a hydroentanglement head, and the hydroentanglement head comprises a collecting chamber 1, a screw 4 is rotatably installed inside the collecting chamber 1, one end of the screw 4 passes through the side wall of the collecting chamber 1 and is installed with a driving motor 5, a mounting seat 3 with an arc-shaped upper end is threadedly connected to the screw 4, and a plurality of hydroentanglement needle groups 10 are equidistantly installed on the upper end of the mounting seat 3, so that the inclination direction of each group of hydroentanglement needle groups 10 is different. One or more hydroentanglement needle groups 10 can be selected for hydroentanglement operation according to actual use requirements, and each group of the hydroentanglement needle groups 10 is correspondingly provided with a control A control valve 11, one end of multiple groups of the control valves 11 is connected to the source through a water pump, the lower end of the mounting seat 3 is slidably connected to the inner bottom of the collecting chamber 1, and the upper end of the collecting chamber 1 is provided with a water thorn opening 12, and two baffles 2 are obliquely arranged on both sides of the water thorn opening 12. When one or more groups of water thorn needle groups 10 are selected to perform water thorn operation, the screw 4 can be driven to rotate by the driving motor 5, so that the mounting seat 3 drives the multiple groups of water thorn needle groups 10 to move horizontally, so that the working water thorn needle group 10 is located directly below the water thorn opening 12, which is convenient for water thorn operation.

[0066] A collecting box 7 is installed at the lower end of the collecting cavity 1, and a collecting port 6 connected to the collecting cavity 1 is opened at the upper end of the collecting box 7. A drain pipe 8 with a solenoid valve is connected to one side of the collecting cavity 1. Water falling into the collecting cavity 1 is collected by the collecting box 7 and then discharged through the drain pipe 8 for recycling. The baffle 2 can be set to drain the internal water entering the collecting cavity 1, so that the internal water enters the collecting cavity 1 through the collecting port 6 and is collected in the collecting box 7.

[0067] A slider 9 is fixed to the lower end of the mounting seat 3, and a slide groove for the slider 9 to slide is provided at the inner bottom of the collecting cavity 1. The sliding direction of the slide groove is the same as the installation direction of the screw 4, so that the mounting seat 3 can drive multiple groups of water puncture needle groups 10 to move horizontally on the screw 4.

[0068] S5, drying the sodium alginate multilayer composite non-woven wet fabric to remove the water remaining in the sodium alginate multilayer composite non-woven wet fabric to obtain a composite non-woven fabric,

[0069] S6, spraying the soaking liquid onto the composite non-woven fabric and drying it again to obtain a sodium alginate multilayer composite non-woven fabric;

[0070] S7, using a slitting machine to slit the sodium alginate multilayer composite nonwoven fabric, and then using a winder to roll up and collect the slit sodium alginate multilayer composite nonwoven fabric.

[0071] The sodium alginate multilayer composite non-woven fabric prepared by the above method and the non-woven fabric prepared by the prior art (the method used in the prior art is 201710701178.2, which discloses a method for preparing a preservative-free non-woven fabric mask) were soaked in the same skin care essence for 1-2 hours to make a mask, and 10 people were respectively given a patch test to confirm the effect after use. The statistical results are as follows:

[0072]

[0073] It can be concluded from the data in the above table that the facial mask prepared with the sodium alginate multi-layer composite non-woven fabric provided by the present invention has obvious repair and improvement on the skin, and improves the elasticity and firmness of the skin to a certain extent.

[0074] Example 2

[0075] The similarities are not repeated here. The difference from Example 1 is that in step S1, the soaking solution includes the following raw materials by mass: 55 parts of sodium alginate, 22 parts of deionized water, 22 parts of glycerol, and 20 parts of NaOH solution.

[0076] Example 3

[0077] The similarities are not repeated here. The difference from Example 1 is that in step S1, the soaking solution includes the following raw materials by mass: 60 parts of sodium alginate, 25 parts of deionized water, 25 parts of glycerol, and 30 parts of NaOH solution.

[0078] In summary, the facial mask prepared from the sodium alginate multi-layer composite non-woven fabric prepared by this method contains sodium alginate substance. The characteristics of sodium alginate have a good repairing and therapeutic effect on the skin, and can effectively improve the elasticity and firmness of the skin.

[0079] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing a sodium alginate multilayer composite facial mask nonwoven fabric, characterized in that: The steps include: S1. Preparation of sodium alginate membrane cloth, using sodium alginate, deionized water, glycerol and NaOH solution as raw materials to prepare a soaking solution, then adding silk into the soaking solution and soaking for 10-12 hours and then drying, and using the soaked silk to knit into a sodium alginate membrane cloth with air permeability; the soaking solution includes the following raw materials by mass: 50-60 parts of sodium alginate, 20-25 parts of deionized water, 20-25 parts of glycerol, and 10-30 parts of NaOH solution; S2, the production of the base fabric, using artificial fiber silk as raw material to weave into a 3D three-dimensional mesh base fabric through a warp knitting machine; S3, the production of the bottom layer fabric, using polypropylene pellets as raw materials, through high temperature melting, spinning, laying, hot pressing and winding continuous one-step production to form the bottom layer fabric; S4, stacking the base fabric, the sodium alginate membrane fabric and the bottom fabric in order, and sending them to a spunlace machine for spunlace reinforcement to obtain a composite non-woven wet fabric; S5, drying the sodium alginate multilayer composite non-woven wet fabric to remove the water remaining in the sodium alginate multilayer composite non-woven wet fabric to obtain a composite non-woven fabric, S6, spraying the soaking liquid onto the composite non-woven fabric and drying it again to obtain a sodium alginate multilayer composite non-woven fabric; S7, using a slitting machine to slit the sodium alginate multilayer composite nonwoven fabric, and then using a winder to roll up and collect the slit sodium alginate multilayer composite nonwoven fabric.

2. The method for preparing a sodium alginate multilayer composite facial mask nonwoven fabric according to claim 1, characterized in that: The preparation of the soaking solution comprises the following steps: A1. Add sodium alginate into deionized water according to the mass ratio and stir to obtain a first mixed solution; A2, adding glycerol to the first mixed solution and continuing to stir and mix to obtain a second mixed solution; A3. Add NaOH solution to the second mixed solution in multiple steps and stir and mix. The pH value of the mixed solution needs to be tested each time the NaOH solution is added, so that the mixed solution is adjusted to an alkaline solution with a pH value between 8 and 9, which is the soaking solution.

3. The method for preparing a sodium alginate multilayer composite facial mask nonwoven fabric according to claim 1, characterized in that: The base fabric and the bottom fabric both have a grammage of 10-18 gsm, and the sodium alginate film fabric has a grammage of 20-32 gsm.

4. The method for preparing a sodium alginate multilayer composite facial mask nonwoven fabric according to claim 3, characterized in that: The base fabric is produced by the following steps: B1. A double-needle-bed high-speed warp knitting machine is used for knitting, wherein the double-needle-bed high-speed warp knitting machine is provided with at least six comb bars, and the six comb bars are provided with a ground comb bar GB1, a ground comb bar GB2, a ground comb bar GB3, a ground comb bar GB4, a ground comb bar GB5 and a ground comb bar GB6 in sequence from the front needle bed to the rear needle bed; B2, threading the yarn on the double needle bed high-speed warp knitting machine in a six-thread and three-empty or one-thread and two-empty manner through the ground comb bar GB1, threading the yarn on the double needle bed high-speed warp knitting machine in a one-thread and one-empty manner through the ground comb bar GB2, threading the yarn on the double needle bed high-speed warp knitting machine in a full-thread manner through the ground comb bar GB3, threading the yarn on the double needle bed high-speed warp knitting machine in a one-thread and one-empty manner through the ground comb bar GB4, threading the yarn on the double needle bed high-speed warp knitting machine in a two-thread and one-empty manner through the ground comb bar GB5, and threading the yarn on the double needle bed high-speed warp knitting machine in a two-thread and one-empty manner through the ground comb bar GB6; B3, ground comb bars GB1 and GB2 pad yarn on the front needle bed and use a changed warp satin structure to form an openwork jacquard layer, ground comb bars GB3 and GB4 alternately pad yarn on the front needle bed and the rear needle bed and use a changed warp knitting structure to form an openwork layer, and ground comb bars GB5 and GB6 pad yarn on the rear needle bed and use a changed warp knitting structure to form an openwork base layer; B4 and ground comb bar GB3 perform loop forming knitting on the front needle bed, and ground comb bar GB3 performs loop forming knitting on the rear needle bed.

5. The method for preparing a sodium alginate multilayer composite facial mask nonwoven fabric according to claim 4, characterized in that: The production of the bottom layer fabric comprises the following steps: C1. The polypropylene pellets are melt-blended in an extruder, and then transported to an extruder for melting. The obtained melt is sprayed out through a spinneret at 210-230°C and evenly spread into a fiber web to obtain a non-woven base fabric, wherein the high-temperature hot air flow rate of the spinneret is 600-700m / s; C2, mixing the plant fiber with water to obtain a slurry; C3. Soak the non-woven fabric in the slurry for 40-60 minutes, and heat-press the non-woven fabric soaked with the slurry to obtain the bottom layer fabric.

6. The method for preparing a sodium alginate multilayer composite facial mask nonwoven fabric according to claim 1, characterized in that: The widths of the base fabric, sodium alginate film fabric and bottom fabric layer are all the same, and when stacking, the sodium alginate film fabric is first evenly laid on the base fabric, and then the base fabric layer is laid on the sodium alginate film fabric, so that the edges of the base fabric, sodium alginate film fabric and bottom fabric layer are aligned, and then the stacked fabric is sent to a spunlace machine for spunlace reinforcement.

7. The method for preparing a sodium alginate multilayer composite facial mask nonwoven fabric according to claim 1, characterized in that: The water jetting machine comprises a water jetting head, which comprises a collecting chamber (1), a screw (4) being rotatably mounted inside the collecting chamber (1), one end of the screw (4) passing through the side wall of the collecting chamber (1) and being mounted with a driving motor (5), a mounting seat (3) having an arc-shaped upper end being threadedly connected to the screw (4), a plurality of groups of water jetting needle groups (10) being equidistantly mounted on the upper end of the mounting seat (3), each group of the water jetting needle groups (10) being correspondingly provided with a control valve (11), one end of the plurality of groups of the control valves (11) being connected to a source via a water pump, the lower end of the mounting seat (3) being slidably connected to the inner bottom of the collecting chamber (1), a water jetting port (12) being provided at the upper end of the collecting chamber (1), two baffles (2) being obliquely provided on both sides of the water jetting port (12).

8. The method for preparing a sodium alginate multilayer composite facial mask nonwoven fabric according to claim 7, characterized in that: A collecting box (7) is installed at the lower end of the collecting cavity (1), a collecting port (6) connected to the collecting cavity (1) is provided at the upper end of the collecting box (7), and a drainage pipe (8) with a solenoid valve is connected to one side of the collecting cavity (1).

9. The method for preparing a sodium alginate multilayer composite facial mask nonwoven fabric according to claim 8, characterized in that: A sliding block (9) is fixed to the lower end of the mounting seat (3), and a sliding groove for the sliding block (9) to slide is provided at the inner bottom of the collecting cavity (1), wherein the sliding direction of the sliding groove is the same as the mounting direction of the screw rod (4).

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