Elastic composite mask base cloth and preparation method thereof

Abstract

The application provides an elastic composite mask base cloth and a preparation method thereof, and relates to the technical field of non-woven fabrics and masks. The elastic composite mask base cloth is prepared by compounding an elastic cloth layer (PP, POE, TPU, TPEE, SEBS or any one or several materials) and a bottom film layer (water-jet non-woven fabric, woven cloth or knitted cloth) attached to one side or both sides of the elastic cloth layer through a glue coating bonding process, a hot rolling bonding process or an ultrasonic reinforcement process. The mask base cloth provided by the application has high elasticity, can better fit the face, thereby promoting the absorption of essence, has better lifting and firming effect, high comfort and high strength.

Description

Technical Field

[0001] This invention relates to the field of nonwoven fabrics and facial masks, and in particular to an elastic composite facial mask base fabric and its preparation method. Background Technology

[0002] Among daily skincare and cosmetic products, face masks are widely popular due to their noticeable effects and portability, making them one of the fastest-growing product categories. The main types of face masks on the market are cream masks and sheet masks. Sheet masks consist of a mask base and an essence. The mask base acts as a carrier, absorbing the essence and adhering firmly to specific areas of the face, forming a sealed layer to promote essence absorption. Sheet masks are more convenient to use and are currently the mainstream product on the market.

[0003] The base fabric of sheet masks is mainly made of non-woven fabric, silk, natural cotton, cupro filament, and Tencel. As a supporting carrier, the base fabric needs to conform well to the facial skin of different consumers. This is not only related to comfort but also allows the essence in the mask to penetrate deeper into the skin. This requires the base fabric to have high elasticity. Facial expressions and movements during mask application also affect the mask's fit. A highly elastic base fabric can adapt to these changes, maintaining a good fit and preventing it from easily falling off. Furthermore, a highly elastic base fabric can also provide a better lifting and firming effect. Therefore, high elasticity is an essential characteristic of mask base fabrics. Elastic non-woven fabrics have good resilience, are soft and skin-friendly, environmentally friendly and non-toxic, and breathable, making them a commonly used material for mask base fabrics. Currently, non-woven mask base fabrics on the market are mainly made of viscose, polyester, polypropylene, and polyethylene. These materials are relatively inexpensive, but their elasticity needs improvement. Therefore, it is necessary to provide a mask base fabric with higher elasticity. Summary of the Invention

[0004] The purpose of this application is to address the shortcomings of existing technologies by providing a multi-layer elastic composite mask base fabric and its preparation method. This mask base fabric has good elasticity, good resilience, high moisture permeability, high comfort, and a significant lifting and firming effect.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] On one hand, an elastic composite mask base fabric includes an elastic fabric layer and a base film layer adhered to one side of the elastic fabric layer, or a base film layer adhered to both sides of the elastic fabric layer; wherein,

[0007] The elastic fabric layer is made of any one or more of the following materials: PP (polypropylene), POE (polyolefin elastomer), TPU (thermoplastic polyurethane elastomer), TPEE (polyester elastomer), and SEBS (styrene / ethylene / butadiene copolymer).

[0008] The elastic fabric layer meets the following requirements: weight 5-50 g / m² 2 , moisture permeability 1000~13000g / (m 2 • 24h), elastic recovery rate greater than 85%;

[0009] The bottom film layer is any one of spunlace nonwoven fabric, woven fabric, or knitted fabric.

[0010] Furthermore, the POE is a copolymer of butene and octene.

[0011] Furthermore, the TPU is composed of hard segments and soft segment inserts; wherein,

[0012] The hard segments of the TPU are at least one of MDI (diphenylmethane diisocyanate), HDI (hexamethylene diisocyanate), IPDI (isophorone diisocyanate), and NDI (naphthalene diisocyanate); the soft segments are at least one of polyester polyol, polycaprolactone diol, polyether polyol, and polyolefin diol; for example, they can be composed of soft segments (polycaprolactone diol) and hard segments (HDI blocks), polycaprolactone diol and IPDI blocks, polycaprolactone diol and NDI blocks, polyester polyol and MDI blocks, polycaprolactone diol and HDI and IPDI blocks, etc.

[0013] Furthermore, the TPEE is composed of hard chain segments and soft chain segment inserts; wherein,

[0014] The hard segment of the TPEE is PBT (polybutylene terephthalate); the soft segment is at least one of PEG (polyethylene glycol), PPG (polyether polyol), PTMG (polybutanediol), PLA (polylactide), PGA (polyglycolic acid), and PCL (polycaprolactone); for example, it can be composed of hard segment PBT and soft segment PEG, PBT and PGA, PBT and PLA, PBT and PPG, PBT and PTMG, PBT and PCL, PBT and PGA and PEG, etc.

[0015] Furthermore, the SEBS is composed of polystyrene end segments and ethylene-butene copolymer intermediate elastic blocks.

[0016] Preferably, the material of the elastic fabric layer is any one of POE, TPU, TPEE, SEBS, PP / TPU, PP / POE, PP / TPEE, PP / SEBS, POE / SEBS, TPU / TPEE, TPEE / SEBS, PP / TPU / TPEE, PP / POE / SEBS, and PP / TPEE / SEBS; more preferably, it is any one of POE, TPU, TPEE, SEBS, PP / TPU, and PP / POE; wherein,

[0017] When the elastic fabric layer is made of PP / TPU, the mass ratio of PP to TPU is (50-75):

[0018] (25-50); more preferably, the mass ratio of PP to TPU is 65:35;

[0019] When the material of the elastic fabric layer is PP / POE, the mass ratio of PP to POE is (65-85):

[0020] (15-35); more preferably, the mass ratio of PP to POE is 75:25.

[0021] Preferably, when the material of the elastic fabric layer is TPU, the following conditions must be met: the basis weight of the elastic fabric layer is 5-50 g / m². 2 Moisture permeability is 10000~13000g / (m²) 2 • 24h), and the elastic recovery rate is greater than 90%; more preferably, the basis weight of the elastic fabric layer is 26-28 g / m². 2 Moisture permeability is 11000~12000g / (m²) 2 •24h), and the elastic recovery rate is greater than 95%.

[0022] Preferably, when the material of the elastic fabric layer is TPEE, the following conditions must be met: the basis weight of the elastic fabric layer is 25-50 g / m². 2 Moisture permeability is 8000~10000g / (m²) 2 •24h), and the elastic recovery rate is 90-93%; more preferably, the basis weight of the elastic fabric layer is 40-50 g / m². 2 Moisture permeability is 9000~10000g / (m²) 2 (24h), and the elastic recovery rate is 91-93%.

[0023] Preferably, when the material of the elastic fabric layer is POE, it satisfies the following condition: the basis weight of the elastic fabric layer is 26-28 g / m². 2 Moisture permeability is 4000-5000 g / (m²). 2 (24h), and the elastic recovery rate is 85-90%.

[0024] Preferably, when the material of the elastic fabric layer is SEBS, the basis weight of the elastic fabric layer is 26-28 g / m². 2 Moisture permeability is 5000-6000 g / (m²). 2 (24h), and the elastic recovery rate is 85-90%.

[0025] Preferably, when the material of the elastic fabric layer is PP / TPU or PP / POE, the basis weight of the elastic fabric layer is 26-28 g / m². 2 Moisture permeability is 4000-5000 g / (m²). 2 (24h), and the elastic recovery rate is 85-90%.

[0026] Furthermore, the bottom film layer is made of natural fibers and / or synthetic fibers.

[0027] Furthermore, the basis weight of the bottom film layer is 25–50 g / m³. 2 .

[0028] Preferably, the basis weight of the bottom film layer is 27±3 g / m³. 2 Spunlace nonwoven fabric.

[0029] On the other hand, a method for preparing an elastic composite mask base fabric includes the following steps:

[0030] S1. Dry one or more of the following materials: PP, POE, TPU, TPEE, and SEBS at 60-120°C, melt-extrude and spin into a web using melt-blowing method to obtain an elastic fabric layer.

[0031] S2. Lay the elastic fabric layer and the base film layer flat in the laminating machine, and laminate them using any one of the following methods: adhesive bonding process, hot rolling bonding process, or ultrasonic reinforcement process. After cooling, the elastic composite mask base fabric is obtained.

[0032] Further, in step S1, during the melt extrusion process, the screw speed is 5-30 r / min, the screw temperature is 80-190℃ in the first zone, 150-270℃ in the second zone, 170-270℃ in the third zone, 170-270℃ in the fourth zone, 170-270℃ in the fifth zone, and the extrusion die temperature is 200-280℃.

[0033] Furthermore, in step S1, during the spinning and web-forming process, the hot air pressure is 5-30 MPa, the hot air temperature is 210-270°C, the cooling temperature is 5-25°C, and the winding speed is 5-30 m / min.

[0034] Further, in step S2, the hot melt adhesive used in the coating process is selected from at least one of polyethylene hot melt adhesive, polypropylene hot melt adhesive, ethylene-vinyl acetate copolymer hot melt adhesive, polyester hot melt adhesive, polyamide hot melt adhesive, and PUR reactive polyurethane hot melt adhesive; the coating amount in the coating process is 2-10 g / m³. 2 The glue gun temperature is 130-210℃; in the glue coating process, the composite extrusion pressure is 0.05-0.8MPa, the tension is controlled at 4-20N, of which the elastic fabric layer tension is controlled at 10-20N, the bottom film layer tension is controlled at 7-15N, and the winding tension is controlled at 4-10N.

[0035] Furthermore, in step S2, the hot rolling bonding process is carried out at a temperature of 50–200°C, a pressure of 0.01–5 MPa, and a linear speed of 1–80 m / min.

[0036] Furthermore, in step S2, the ultrasonic reinforcement process uses an ultrasonic frequency of 13–15 kHz, a pressure of 0.05–0.3 MPa, and a linear velocity of 5–30 m / min.

[0037] Preferably, in step S2, the composite process is preferably an adhesive bonding process.

[0038] Compared with the prior art, this application has the following beneficial effects:

[0039] 1. The elastic composite mask base fabric provided in this application has high elasticity, can better fit the face, thereby promoting the absorption of essence, with better lifting and firming effect, high comfort, high strength, strong liquid absorption and retention, which can increase the load of essence and reduce the waste of essence.

[0040] 2. This application uses a nonwoven fabric prepared from one or more of the following materials as the elastic layer: PP, POE, TPU, TPEE, and SEBS. The basis weight of the elastic layer is selected to be 5–50 g / m². 2 Moisture permeability is 1000~13000g / (m²) 2 Meltblown nonwoven fabric within a 24-hour range not only gives the resulting mask base fabric higher elasticity and improves comfort compared to conventional mask base fabric, but also helps to enhance the strength of the mask base fabric.

[0041] 3. The method for preparing the elastic composite mask base fabric of this application is simple and has strong applicability. Attached Figure Description

[0042] Figure 1 This is an SEM image of the double-layer elastic composite mask base fabric in Example 4;

[0043] Figure 2 This is an SEM image of the TPU elastic fabric layer in Example 4. Detailed Implementation

[0044] The following non-limiting embodiments are intended to enable those skilled in the art to gain a more comprehensive understanding of this application, but do not limit this application in any way. The following content is merely an exemplary description of the scope of protection claimed in this application, and those skilled in the art can make various changes and modifications to the invention based on the disclosed content, which should also fall within the scope of protection claimed in this application.

[0045] In this application, the bottom film layer can be natural fiber or synthetic fiber, or any of the following: spunlace nonwoven fabric, woven fabric, or knitted fabric made of natural fiber and synthetic fiber composite; in the following specific embodiments, the bottom film layer is a spunlace fabric made of kapok fiber, which does not constitute a limitation of this application. Nonwoven fabric, woven fabric, or knitted fabric made of other fibers can also achieve the technical effect of this application.

[0046] In this application, the elastic fabric layer and the base film layer are bonded using any one of the following methods: adhesive bonding, hot rolling bonding, or ultrasonic reinforcement. In the specific embodiments described below, adhesive bonding is used, but this does not constitute a limitation of this application. All of the above methods can bond the elastic fabric layer and the base film layer, successfully preparing the desired mask base fabric, thereby achieving the technical effect of this application. The adhesive used in the adhesive bonding process is a commonly used hot melt adhesive in the art, and there is no particular limitation. Examples include polyethylene hot melt adhesive, polypropylene hot melt adhesive, ethylene-vinyl acetate copolymer hot melt adhesive, polyester hot melt adhesive, polyamide hot melt adhesive, and PUR reactive polyurethane hot melt adhesive. In the specific embodiments described below, adhesive bonding is used, but this does not constitute a limitation of this application.

[0047] The present application will be further described below by way of specific embodiments. Unless otherwise specified, all chemical reagents used in the embodiments of this application are obtained through conventional commercial means.

[0048] Example 1

[0049] A double-layer elastic composite mask base fabric includes an elastic fabric layer and a base film layer adhered to one side of the elastic fabric layer; wherein, the elastic fabric layer is a PP / TPU (PP:TPU mass ratio 65:35) meltblown fabric with a basis weight of 26.8 g / m². 2 The bottom film layer is made of kapok fiber spunlace fabric with a basis weight of 27.1 g / m². 2 .

[0050] The preparation method of the double-layer elastic composite mask base fabric includes the following steps:

[0051] (1) PP and TPU (soft segment polycaprolactone diol, hard segment HDI) were dried at 80℃ and then melt-extruded, and then spun into a web using melt-blowing to obtain a PP / TPU elastic fabric layer. The screw speed during the melt extrusion process was 30 r / min; the screw temperature was 160℃ in the first zone, 190℃ in the second zone, 230℃ in the third zone, 230℃ in the fourth zone, and 230℃ in the fifth zone; the extrusion die temperature was 255℃; the hot air pressure during the spinning process was 15 MPa, the hot air temperature was 260℃, the cooling temperature was 15℃, and the winding speed was 30 m / min.

[0052] (2) The PP / TPU elastic fabric layer and the kapok fiber spunlace fabric base layer are laid flat in a laminating machine, coated with polypropylene hot melt adhesive, and bonded under pressure to obtain the double-layer elastic composite mask base fabric. The adhesive application rate is 10 g / m². 2 The glue gun temperature is 180℃. During the glue application process, the composite extrusion pressure is 0.05MPa, the elastic fabric layer tension is controlled at 10N, the bottom film layer tension is controlled at 7N, and the winding tension is controlled at 4N.

[0053] Example 2

[0054] A double-layer elastic composite mask base fabric includes an elastic fabric layer and a bottom film layer adhered to one side of the elastic fabric layer; wherein, the elastic fabric layer is a PP / POE (PP:POE mass ratio 75:25) meltblown fabric with a basis weight of 26.7 g / m². 2 The bottom film layer is made of kapok fiber spunlace fabric with a basis weight of 27.1 g / m². 2 .

[0055] The preparation method of the double-layer elastic composite mask base fabric includes the following steps:

[0056] (1) PP and POE are dried at 70℃ and then melt-extruded, and then spun into a web by melt-blowing to obtain PP / POE elastic fabric layer. The screw speed during melt extrusion is 30 r / min; the screw temperature is 155℃ in the first zone, 185℃ in the second zone, 225℃ in the third zone, 230℃ in the fourth zone, and 230℃ in the fifth zone; the extrusion die temperature is 250℃; the hot air pressure during spinning is 20 MPa, the hot air temperature is 260℃, the cooling temperature is 13℃, and the winding speed is 20 m / min.

[0057] (2) The PP / POE elastic fabric layer and the kapok fiber spunlace fabric base layer are laid flat in a laminating machine, coated with polypropylene hot melt adhesive, and bonded under pressure to obtain the double-layer elastic composite mask base fabric. The adhesive application rate is 10 g / m². 2 The glue gun temperature is 180℃. During the glue application process, the composite extrusion pressure is 0.08MPa, the elastic fabric layer tension is controlled at 10N, the bottom film layer tension is controlled at 7N, and the winding tension is controlled at 4N.

[0058] Example 3

[0059] A double-layer elastic composite mask base fabric includes an elastic fabric layer and a bottom film layer adhered to one side of the elastic fabric layer; wherein the elastic fabric layer is POE meltblown fabric with a basis weight of 26.6 g / m². 2 The bottom film layer is made of kapok fiber spunlace fabric with a basis weight of 27.1 g / m². 2 .

[0060] The preparation method of the double-layer elastic composite mask base fabric includes the following steps:

[0061] (1) POE is dried at 60℃ and then melt-extruded, and then spun into a web by melt-blowing to obtain POE elastic fabric layer. The screw speed during the melt extrusion process is 5 r / min; the screw temperature is 80℃ in the first zone, 150℃ in the second zone, 170℃ in the third zone, 170℃ in the fourth zone, and 170℃ in the fifth zone; the extrusion die temperature is 200℃; the hot air pressure during the spinning process is 30MPa, the hot air temperature is 210℃, the cooling temperature is 5℃, and the winding speed is 5m / min.

[0062] (2) The POE elastic fabric layer and the kapok fiber spunlace fabric base layer are laid flat in a laminating machine, coated with ethylene-vinyl acetate copolymer hot melt adhesive, and bonded under pressure to obtain the double-layer elastic composite mask base fabric. The adhesive application rate is 2 g / m². 2 The glue gun temperature is 130℃. During the glue application process, the composite extrusion pressure is 0.2MPa, the elastic fabric layer tension is controlled at 15N, the bottom film layer tension is controlled at 10N, and the winding tension is controlled at 7N.

[0063] Example 4

[0064] A double-layer elastic composite mask base fabric includes an elastic fabric layer and a base film layer adhered to one side of the elastic fabric layer; wherein the elastic fabric layer is TPU meltblown fabric with a basis weight of 26.8 g / m². 2 The bottom film layer is made of kapok fiber spunlace fabric with a basis weight of 27.1 g / m². 2 .

[0065] The preparation method of the double-layer elastic composite mask base fabric includes the following steps:

[0066] (1) TPU (soft segment polycaprolactone diol, hard segment HDI) was dried at 120℃ and then melt-extruded, followed by melt-blowing to form a web, resulting in a TPU elastic fabric layer. SEM images are shown below. Figure 2As shown. The screw speed during melt extrusion is 10 r / min; the screw temperature is 180℃ in zone 1, 220℃ in zone 2, 235℃ in zone 3, 235℃ in zone 4, and 235℃ in zone 5; the extrusion die temperature is 255℃; the hot air pressure during spinning and web formation is 10 MPa, the hot air temperature is 260℃, the cooling temperature is 25℃, and the winding speed is 10 m / min.

[0067] (2) The TPU elastic fabric layer and the kapok fiber spunlace fabric base layer are laid flat in a laminating machine, coated with PUR reactive polyurethane hot melt adhesive, and bonded under pressure to obtain the double-layer elastic composite mask base fabric. The SEM image is shown below. Figure 1 As shown. The application rate is 5 g / m². 2 The glue gun temperature is 180℃. During the glue application process, the composite extrusion pressure is 0.5MPa, the elastic fabric layer tension is controlled at 20N, the bottom film layer tension is controlled at 15N, and the winding tension is controlled at 10N.

[0068] Example 5

[0069] A double-layer elastic composite mask base fabric includes an elastic fabric layer and a bottom film layer adhered to one side of the elastic fabric layer; wherein the elastic fabric layer is TPEE meltblown fabric with a basis weight of 27.2 g / m². 2 The bottom film layer is made of kapok fiber spunlace fabric with a basis weight of 27.1 g / m². 2 .

[0070] The preparation method of the double-layer elastic composite mask base fabric includes the following steps:

[0071] (1) TPEE (hard segment is PBT, soft segment is PEG) was dried at 120℃ and then melt-extruded, and then spun into a web by melt-blowing to obtain the TPEE elastic fabric layer. The screw speed during the melt extrusion process was 15 r / min; the screw temperature was 190℃ in the first zone, 230℃ in the second zone, 250℃ in the third zone, 270℃ in the fourth zone, and 270℃ in the fifth zone; the extrusion die temperature was 280℃; the hot air pressure during the spinning process was 15 MPa, the hot air temperature was 270℃, the cooling temperature was 10℃, and the winding speed was 10 m / min.

[0072] (2) The TPEE elastic fabric layer and the kapok fiber spunlace fabric base layer are laid flat in a laminating machine, coated with polyamide hot melt adhesive, and bonded under pressure to obtain the double-layer elastic composite mask base fabric. The adhesive application rate is 6 g / m². 2 The glue gun temperature is 210℃. During the glue application process, the composite extrusion pressure is 0.5MPa, the elastic fabric layer tension is controlled at 16N, the bottom film layer tension is controlled at 12N, and the winding tension is controlled at 7N.

[0073] Example 6

[0074] A double-layer elastic composite mask base fabric includes an elastic fabric layer and a base film layer adhered to one side of the elastic fabric layer; wherein the elastic fabric layer is SEBS meltblown fabric with a basis weight of 27.1 g / m². 2 The bottom film layer is made of kapok fiber spunlace fabric with a basis weight of 27.1 g / m². 2 .

[0075] The preparation method of the double-layer elastic composite mask base fabric includes the following steps:

[0076] (1) SEBS was dried at 80℃ and then melt-extruded, and then spun into a web by melt-blowing to obtain an elastic SEBS fabric layer. The screw speed during the melt extrusion process was 20 r / min; the screw temperature was 140℃ in the first zone, 170℃ in the second zone, 200℃ in the third zone, 200℃ in the fourth zone, and 200℃ in the fifth zone; the extrusion die temperature was 210℃; the hot air pressure during the spinning process was 12 MPa, the hot air temperature was 255℃, the cooling temperature was 20℃, and the winding speed was 20 m / min.

[0077] (2) The TPU elastic fabric layer and the kapok fiber spunlace fabric base layer are laid flat in a laminating machine, coated with ethylene-vinyl acetate copolymer hot melt adhesive, and bonded under pressure to obtain the double-layer elastic composite mask base fabric. The adhesive application rate is 5 g / m². 2 The glue gun temperature is 130℃. During the glue application process, the composite extrusion pressure is 0.2MPa, the elastic fabric layer tension is controlled at 15N, the bottom film layer tension is controlled at 10N, and the winding tension is controlled at 7N.

[0078] Example 7

[0079] A double-layer elastic composite mask base fabric, which differs from Example 5 in that the hard segment of TPEE is PBT and the soft segment is PLA.

[0080] Example 8

[0081] A double-layer elastic composite mask base fabric, which differs from Example 5 in that the hard segment of TPEE is PBT and the soft segment is PGA.

[0082] Example 9

[0083] A double-layer elastic composite mask base fabric, which differs from Example 4 in that the basis weight of the TPU elastic fabric layer is 5 g / m². 2 .

[0084] Example 10

[0085] A double-layer elastic composite mask base fabric, differing from Example 4 in that the basis weight of the TPU elastic fabric layer is 12.0 g / m². 2 .

[0086] Example 11

[0087] A double-layer elastic composite mask base fabric, differing from Example 4 in that the basis weight of the TPU elastic fabric layer is 35.0 g / m². 2 .

[0088] Example 12

[0089] A double-layer elastic composite mask base fabric, differing from Example 5 in that the basis weight of the TPEE elastic fabric layer is 40.0 g / m². 2 .

[0090] Example 13

[0091] A double-layer elastic composite mask base fabric, differing from Example 5 in that the basis weight of the TPEE elastic fabric layer is 50.0 g / m². 2 .

[0092] Example 14

[0093] A three-layer elastic composite mask base fabric includes an elastic fabric layer and a base film layer adhered to both sides of the elastic fabric layer; wherein the elastic fabric layer is TPU meltblown fabric with a basis weight of 27.3 g / m². 2 The bottom film layer is made of kapok fiber spunlace fabric with a basis weight of 27.1 g / m². 2 .

[0094] The preparation method of the double-layer elastic composite mask base fabric includes the following steps:

[0095] (1) TPU (soft segment polycaprolactone diol, hard segment HDI) was dried at 120℃ and then melt-extruded, and then spun into a web using melt-blowing to obtain a TPU elastic fabric layer. The screw speed during the melt extrusion process was 10 r / min; the screw temperature was 180℃ in the first zone, 220℃ in the second zone, 235℃ in the third zone, 235℃ in the fourth zone, and 235℃ in the fifth zone; the extrusion die temperature was 255℃; the hot air pressure during the spinning process was 10 MPa, the hot air temperature was 260℃, the cooling temperature was 25℃, and the winding speed was 10 m / min.

[0096] (2) A layer of TPU elastic fabric and two layers of kapok fiber spunlace fabric base film are laid flat in a laminating machine, coated with PUR reactive polyurethane hot melt adhesive, and bonded under pressure to obtain the double-layer elastic composite mask base fabric. The adhesive application amount on both sides is 4g / m². 2 The glue gun temperature is 180℃. During the glue application process, the composite extrusion pressure is 0.3MPa, the elastic fabric layer tension is controlled at 20N, the bottom film layer tension is controlled at 15N, and the winding tension is controlled at 10N.

[0097] Example 15

[0098] A double-layer elastic composite mask base fabric, which differs from Example 1 in that the elastic fabric layer is PP / TPU (PP and TPU mass ratio of 40:60) meltblown fabric.

[0099] Example 16

[0100] A double-layer elastic composite mask base fabric, which differs from Example 1 in that the elastic fabric layer is PP / TPU (PP and TPU mass ratio of 50:50) meltblown fabric.

[0101] Example 17

[0102] A double-layer elastic composite mask base fabric, which differs from Example 1 in that the elastic fabric layer is PP / TPU (PP and TPU mass ratio of 75:25) meltblown fabric.

[0103] Example 18

[0104] A double-layer elastic composite mask base fabric, which differs from Example 1 in that the elastic fabric layer is PP / TPU (PP and TPU mass ratio of 80:20) meltblown fabric.

[0105] Example 19

[0106] A double-layer elastic composite mask base fabric, which differs from Example 4, is composited with the TPU elastic fabric layer and the kapok fiber spunlace fabric base film layer by a hot rolling bonding process. The specific steps are as follows: the TPU elastic fabric layer and the kapok fiber spunlace fabric base film layer are laid flat in a hot rolling mill, the hot rolling bonding temperature is 200℃, the pressure is 0.5MPa, and the linear speed is 10m / min.

[0107] Example 20

[0108] A double-layer elastic composite mask base fabric, which differs from Example 4, is composited with a TPU elastic fabric layer and a kapok fiber spunlace fabric base film layer by an ultrasonic reinforcement process. The specific steps are as follows: the TPU elastic fabric layer and the kapok fiber spunlace fabric base film layer are laid flat in an ultrasonic laminating machine, the ultrasonic bonding frequency is 15KHz, the pressure is 0.15MPa, and the linear speed is 30m / min.

[0109] Comparative Example 1

[0110] A double-layer elastic composite mask base fabric includes an elastic fabric layer and a base film layer adhered to one side of the elastic fabric layer; wherein the elastic fabric layer is a TPU spunbond fabric with a basis weight of 26.8 g / m². 2 The bottom film layer is made of kapok fiber spunlace fabric with a basis weight of 27.1 g / m². 2 Its preparation method includes the following steps:

[0111] (1) TPU (soft segment polycaprolactone diol, hard segment HDI) is dried at 120℃, melt-extruded, and spun into a web using a spunbond process. After melt extrusion, the TPU fibers are stretched and laid into a web using airflow. Then, they are bonded by a thermal bonding process, and after cooling, a TPU elastic fabric layer is obtained. The screw speed during melt extrusion is 20 r / min; the screw temperature is 180℃ in the first zone, 220℃ in the second zone, 235℃ in the third zone, 235℃ in the fourth zone, and 235℃ in the fifth zone; the extrusion die temperature is 255℃; the fiber stretching ratio is 3 times, the stretching temperature is 100℃, the thermal bonding temperature after web formation is 180℃, the pressure is 0.5MPa, and the winding speed is 80m / min.

[0112] (2) The TPU elastic fabric layer and the kapok fiber spunlace fabric base layer are laid flat in a laminating machine, coated with PUR reactive polyurethane hot melt adhesive, and bonded under pressure to obtain the double-layer elastic composite mask base fabric. The adhesive application rate is 5 g / m². 2 The glue gun temperature is 180℃. During the glue application process, the composite extrusion pressure is 0.5MPa, the elastic fabric layer tension is controlled at 20N, the bottom film layer tension is controlled at 15N, and the winding tension is controlled at 10N.

[0113] Comparative Example 2

[0114] A double-layer elastic composite mask base fabric, which differs from Example 1 in that the elastic fabric layer is PP / TPO (PP, TPO mass ratio 65:35) meltblown fabric.

[0115] Comparative Example 3

[0116] A double-layer elastic composite mask base fabric, which differs from Example 2 in that the elastic fabric layer is PP / SBS (PP:SBS mass ratio 75:25) meltblown fabric.

[0117] Comparative Example 4

[0118] A double-layer elastic composite mask base fabric, differing from Example 4, is provided in that the elastic layer is a TPU / POE (TPU:POE mass ratio 30:70) meltblown fabric, and the basis weight of the TPU / POE elastic layer is 26.8 g / m². 2 .

[0119] Comparative Example 5

[0120] A double-layer elastic composite mask base fabric, differing from Example 4, features an elastic fabric layer made of TPU / POE / PP (TPU, POE, PP mass ratio 50:40:10) meltblown fabric, with a basis weight of 26.7 g / m². 2 .

[0121] Comparative Example 6

[0122] A double-layer elastic composite mask base fabric, differing from Example 4 in that the basis weight of the TPU elastic fabric layer is 70.0 g / m². 2 .

[0123] Test case

[0124] The basis weight, tensile strength, and elongation at break of the elastic fabrics obtained in step 1 of the above embodiments and comparative examples were tested according to GB / T 24218.3. The moisture permeability was tested according to GB / T 1037-2021. The test results are shown in Table 1 below.

[0125] Table 1

[0126]

[0127] The moisturizing performance of the mask base fabric obtained in the above embodiments was tested according to GB / T 21655.1-2023, and the test results are shown in Table 2 below.

[0128] Table 2

[0129]

[0130]

[0131] As shown in Tables 1 and 2, the mask base fabric prepared by the materials and methods described in this invention has high elasticity, can better fit the face, thereby promoting the absorption of essence, and has better lifting and firming effect, high comfort, high strength, high moisturizing properties, strong liquid absorption and retention, which can increase the load of essence and reduce the waste of essence.

[0132] In Comparative Example 1, the elastic fabric was spunbond fabric. The resulting mask base fabric had lower moisture retention, tensile strength, and elongation at break compared to Example 4, resulting in a poorer lifting and firming effect.

[0133] The meltblown fabric materials in Comparative Examples 2-5 are different from those in the Examples. The tensile strength, elongation at break, and moisture retention of the resulting mask base fabric are worse than those in the Examples. It can be seen that by selecting the meltblown fabric of this application, a mask base fabric with high elasticity and better lifting and firming effect can be obtained.

[0134] In Comparative Example 6, the meltblown fabric had an excessively high basis weight. Although the tensile strength and moisture retention of the resulting mask base fabric were better than those of Example 4, the elongation at break was significantly lower, and the elasticity decreased. In Examples 9 and 10, the meltblown fabric had a relatively low basis weight, resulting in lower tensile strength, elongation at break, and moisture retention of the resulting mask base fabric. Therefore, the basis weight of the meltblown fabric has a significant impact on the strength, elasticity, and moisture retention of the mask base fabric. Selecting a specific basis weight of meltblown fabric (elastic fabric layer) can yield a mask base fabric with superior strength, elasticity, and moisture retention properties.

[0135] The meltblown fabrics provided in this application can all be used to prepare mask base fabrics with good moisture permeability, resilience, moisture retention, and lifting and firming effects, thereby solving the technical problems to be solved in this application. When the meltblown fabric is made of one, two, three, or even more of the following materials: PP, POE, TPU, TPEE, and SEBS, as long as it meets the performance parameters (including basis weight, moisture permeability, and elastic recovery rate) specified in this application, the technical effects of this application can be achieved. Since there are many combinations of the above materials and many combinations of different material segments, this application will not list them all. Those skilled in the art, based on a clear understanding of the technical concept of this application, can infer that the meltblown fabrics specified above can all achieve the technical effects of this application. Furthermore, the selection range of performance parameters differs when selecting different types of materials or materials with different chain segments. For example, when POE is selected as the material for the elastic fabric layer, the elastic fabric layer needs to meet a basis weight of 26–28 g / m². 2 Moisture permeability is 4000-5000 g / (m²). 2 The technical effect of this application can only be achieved if the elastic recovery rate is 85-90% (24h). However, since there are many combinations of materials and many combinations of chain segments of different materials, this application will not list them all.

[0136] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, this application is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of this application without departing from the scope of this application should be within the protection scope of this application.

Claims

1. An elastic composite mask base fabric, characterized in that, It includes an elastic fabric layer and a base film layer adhered to one or both sides of the elastic fabric layer; wherein, The elastic fabric layer is a meltblown fabric made of any one of the following materials: POE, TPEE, SEBS, PP / TPU, PP / POE, PP / TPEE, PP / SEBS, POE / SEBS, TPU / TPEE, TPEE / SEBS, PP / TPU / TPEE, PP / POE / SEBS, and PP / TPEE / SEBS. The elastic cloth layer satisfies: a grammage of 5-50 g / m 2 , a moisture permeation amount of 1000-13000 g / (m²·24h), and an elastic recovery rate of greater than 85%. The bottom film layer is any one of spunlace nonwoven fabric, woven fabric, and knitted fabric; The preparation method of the elastic fabric layer is as follows: The material is dried at 60~120℃, melt-extruded, and spun into a web using melt-blowing to obtain an elastic fabric layer. During the melt extrusion process, the screw speed is 5~30 r / min, the screw temperature is 80~190℃ in the first zone, 150~270℃ in the second zone, 170~270℃ in the third zone, 170~270℃ in the fourth zone, and 170~270℃ in the fifth zone, and the extrusion die temperature is 200~280℃. During the spinning process, the hot air pressure is 5~30 MPa, the hot air temperature is 210~270℃, the cooling temperature is 5~25℃, and the winding speed is 5~30 m / min.

2. The elastic composite mask base fabric according to claim 1, characterized in that, The POE is a copolymer of butene and octene; the TPU is composed of hard segments and soft segments; the TPEE is composed of hard segments and soft segments; and the SEBS is composed of polystyrene end segments and ethylene-butene copolymer intermediate elastic blocks.

3. The elastic composite mask base fabric according to claim 2, characterized in that, The TPU has a hard segment of at least one of MDI, HDI, IPDI, and NDI, and a soft segment of at least one of polyester polyol, polyether polyol, and polyolefin diol; the TPEE has a hard segment of PBT and a soft segment of at least one of PEG, PPG, PTMG, PLA, PGA, and PCL.

4. The elastic composite mask base fabric according to claim 1, characterized in that, The bottom film layer is made of natural fibers and / or synthetic fibers.

5. The method for preparing the elastic composite mask base fabric according to any one of claims 1-4, characterized in that, Includes the following steps: S1. Place any one or more of the following materials—POE, TPEE, SEBS, PP / TPU, PP / POE, PP / TPEE, PP / SEBS, POE / SEBS, TPU / TPEE, TPEE / SEBS, PP / TPU / TPEE, PP / POE / SEBS, and PP / TPEE / SEBS—at 60-120°C, melt-extrude them, and then spin them into a web using a melt-blowing method to obtain an elastic fabric layer. During the melt extrusion process, the screw speed is 5~30 r / min, the screw temperature is 80~190℃ in the first zone, 150~270℃ in the second zone, 170~270℃ in the third zone, 170~270℃ in the fourth zone, and 170~270℃ in the fifth zone, and the extrusion die temperature is 200~280℃. The hot air pressure during the spinning and web-forming process is 5~30 MPa, the hot air temperature is 210~270℃, the cooling temperature is 5~25℃, and the winding speed is 5~30 m / min; S2. Lay the elastic fabric layer and the base film layer flat in the laminating machine, and laminate them using any one of the following methods: adhesive bonding process, hot rolling bonding process, or ultrasonic reinforcement process. After cooling, the elastic composite mask base fabric is obtained.

6. The method for preparing the elastic composite mask base fabric according to claim 5, characterized in that, The composite method in step S2 is an adhesive bonding process.

7. The method for preparing the elastic composite mask base fabric according to claim 5, characterized in that, The hot melt adhesive used in the adhesive bonding process is selected from at least one of polyethylene hot melt adhesive, polypropylene hot melt adhesive, ethylene-vinyl acetate copolymer hot melt adhesive, polyester hot melt adhesive, polyamide hot melt adhesive, and PUR reactive polyurethane hot melt adhesive.

8. The method for preparing the elastic composite mask base fabric according to claim 5, characterized in that, The glue coating amount of the hot melt adhesive in the glue coating and bonding process is 2-10 g / m 2 The glue gun temperature is 130-210 DEG C; in the glue coating and bonding process, the composite extrusion pressure is 0.05-0.8 MPa, the tension is controlled to be 4-20 N, wherein the elastic cloth layer tension is controlled to be 10-20 N, the bottom film layer tension is controlled to be 7-15 N, and the winding tension is controlled to be 4-10 N.

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