Elastic composite mask base cloth and preparation method thereof

Abstract

The invention provides elastic composite mask base cloth and a preparation method thereof, and relates to the technical field of non-woven cloth and masks. The elastic composite mask base cloth is prepared by compounding an elastic cloth layer (prepared from any one or more of PP, POE, TPU, TPEE and SEBS) and a bottom membrane layer (spunlace non-woven fabric, woven fabric and knitted fabric) attached to one side or two sides of the elastic cloth layer through a gluing bonding process, a hot rolling bonding process or an ultrasonic reinforcing process. The mask base cloth provided by the invention has relatively high elasticity, can be better attached to the face so as to promote the absorption of essence, and is better in lifting and tightening effect, high in comfort and high in strength.

Description

Technical Field

[0001] The present invention relates to the technical field of nonwoven fabrics and facial masks, and in particular to an elastic composite facial mask base fabric and a preparation method thereof. Background Art

[0002] Among everyday skincare cosmetics, facial masks are widely popular among consumers due to their proven effectiveness and portability, making them one of the fastest-growing categories in the skincare cosmetics category. Facial masks on the market primarily consist of smear-type and sheet-type masks. Sheet-type masks consist of a base fabric and serum. The base fabric acts as a carrier to absorb the serum and adheres securely to specific areas of the face, forming a sealant layer that promotes serum absorption. Sheet-type masks are more convenient to use and are currently the mainstream product on the market.

[0003] The main materials used for the base fabric of patch-type facial masks include nonwovens, silk, natural cotton, cupro-ammonia filament, and Tencel. As a supporting carrier, the base fabric must conform perfectly to the individual consumer's facial skin. This not only impacts comfort but also allows the essence in the mask to penetrate deeper into the skin. This requires high elasticity. Expressions and movements during mask application can affect the mask's fit. Highly elastic base fabrics can adapt to these changes, maintaining a consistent fit and preventing it from easily falling off. Furthermore, highly elastic base fabrics can provide a stronger lifting and firming effect. Therefore, high elasticity is a must-have feature for base fabrics. Elastic nonwovens are a commonly used material for facial mask base fabrics, offering excellent resilience, softness, skin-friendliness, environmental friendliness, and breathability. Currently, nonwovens used on the market are primarily made of viscose, polyester, polypropylene, and polyethylene. While these materials are relatively inexpensive, their elasticity needs to be improved. Therefore, there is a need for a base fabric with high elasticity. Summary of the Invention

[0004] The purpose of this application is to address the deficiencies in the existing technology and provide a multi-layer elastic composite facial mask base fabric and a preparation method thereof. The facial mask base fabric has good elasticity, good resilience, high moisture permeability, high comfort, and a more obvious lifting and firming effect.

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

[0006] In one aspect, a stretch composite facial mask base fabric comprises an elastic fabric layer and a bottom film layer attached to one side of the elastic fabric layer, or to both sides of the elastic fabric layer; wherein,

[0007] The elastic fabric layer is made of any one or more materials selected from the group consisting of 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: gram weight 5-50g / m 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 and knitted fabric.

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

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

[0012] The hard segment in the TPU is at least one of MDI (diphenylmethane diisocyanate), HDI (hexamethylene diisocyanate), IPDI (isophorone diisocyanate), and NDI (naphthalene diisocyanate); the soft segment is at least one of polyester polyol, polycaprolactone diol, polyether polyol, and polyolefin diol; for example, the soft segment can be composed of a soft segment polycaprolactone diol and a hard segment HDI block, a polycaprolactone diol and IPDI block, a polycaprolactone diol and NDI block, a polyester polyol and MDI block, a polycaprolactone diol and HDI and IPDI block, and the like.

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

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

[0015] Furthermore, the SEBS consists of polystyrene terminal segments and ethylene-butylene copolymer middle 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, PP / TPEE / SEBS, more preferably any one of POE, TPU, TPEE, SEBS, PP / TPU, PP / POE; wherein,

[0017] When the material of the elastic fabric layer is 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 are met: the weight of the elastic fabric layer is 5 to 50 g / m 2 , moisture permeability is 10000~13000g / (m 2 · 24h), and the elastic recovery rate is greater than 90%; more preferably, the weight of the elastic fabric layer is 26-28g / m 2 , moisture permeability is 11000~12000g / (m 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 are met: the weight of the elastic fabric layer is 25 to 50 g / m 2 , moisture permeability is 8000~10000g / (m 2 · 24h), and the elastic recovery rate is 90-93%; more preferably, the weight of the elastic fabric layer is 40-50g / m 2 , moisture permeability is 9000~10000g / (m 2 ·24h), and the elastic recovery rate is 91-93%.

[0023] Preferably, when the material of the elastic fabric layer is POE, the following conditions are met: the weight of the elastic fabric layer is 26-28 g / m 2 , moisture permeability is 4000~5000g / (m 2 ·24h), and the elastic recovery rate is 85-90%.

[0024] Preferably, when the material of the elastic fabric layer is SEBS, the following conditions are met: the weight of the elastic fabric layer is 26-28 g / m 2 , moisture permeability is 5000~6000g / (m 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 elastic fabric layer has a gram weight of 26 to 28 g / m 2 , moisture permeability is 4000~5000g / (m 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 base film layer has a gram weight of 25 to 50 g / m 2 .

[0028] Preferably, the base film layer has a gram weight of 27±3 g / m 2 Spunlace nonwovens.

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

[0030] S1. Drying any one or more materials of PP, POE, TPU, TPEE, and SEBS at 60-120° C., melt-extruding, and spinning into a web by melt-blowing to obtain an elastic fabric layer;

[0031] S2. Lay the elastic fabric layer and the bottom film layer flat in a laminating machine, and laminate them using any one of a gluing process, a hot rolling process, and an ultrasonic reinforcement process, and cool them to obtain the elastic composite facial mask base fabric.

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

[0033] Furthermore, in step S1, during the spinning 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] Furthermore, in step S2, the hot melt adhesive used in the gluing 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 amount of glue applied in the gluing process is 2 to 10 g / m 2 , the glue gun temperature is 130~210℃; in the gluing process, the composite extrusion pressure is 0.05~0.8MPa, the tension is controlled at 4~20N, 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, in the hot rolling bonding process, the hot rolling bonding temperature is 50-200°C, the pressure is 0.01-5 MPa, and the line speed is 1-80 m / min.

[0036] Furthermore, in step S2, in the ultrasonic reinforcement process, the ultrasonic frequency is 13-15 KHz, the pressure is 0.05-0.3 MPa, and the linear speed is 5-30 m / min.

[0037] Preferably, in step S2, the composite process is preferably a gluing and 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 and can better fit the face, thereby promoting the absorption of essence. It has better lifting and firming effect, high comfort, high strength, strong liquid absorption and retention, can increase the load of essence, and can reduce the waste of essence.

[0040] 2. This application uses a non-woven fabric made of one or more materials selected from PP, POE, TPU, TPEE, and SEBS as the elastic fabric layer, and the elastic fabric layer has a gram weight of 5 to 50 g / m 2 , moisture permeability is 1000~13000g / (m 2 24h) range, not only makes the resulting facial mask base fabric more elastic than conventional facial mask base fabric, and improves comfort, but also helps to improve the strength of the facial mask base fabric.

[0041] 3. The preparation method of the elastic composite facial mask base fabric of the present application is simple and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0044] The following non-limiting examples are provided to enable those skilled in the art to more fully understand the present application, but are not intended to limit the present application in any way. The following contents are merely illustrative of the scope of protection claimed in the present application. Those skilled in the art may make various changes and modifications to the invention of the present application based on the disclosed contents, and such changes and modifications shall also fall within the scope of protection claimed in the present application.

[0045] In the present application, the bottom film layer can be natural fiber or synthetic fiber, or any one of spunlace nonwoven fabric, woven fabric, and knitted fabric prepared by combining natural fiber and synthetic fiber; in the following specific embodiment, the bottom film layer is a spunlace fabric made of kapok fiber, which does not constitute a limitation of the present application. The technical effect of the present application can also be achieved by selecting nonwoven fabric, woven fabric, or knitted fabric made of other fibers.

[0046] In the present application, the elastic fabric layer and the base film layer are bonded together using any of the following methods: gluing, hot rolling, and ultrasonic reinforcement. In the following specific embodiments, the gluing process is used for bonding, which does not constitute a limitation on the present application. The above methods can all bond the elastic fabric layer and the base film layer to successfully prepare the desired mask base fabric, thereby achieving the technical effects of the present application. The hot melt adhesive commonly used in the field of hot melt adhesive used in the gluing process is not particularly limited. For example, polyethylene hot melt adhesive, polypropylene hot melt adhesive, ethylene-vinyl acetate copolymer hot melt adhesive, polyester hot melt adhesive, polyamide hot melt adhesive, PUR reactive polyurethane hot melt adhesive, etc. can be cited. In the following specific embodiments, the gluing process is used for bonding, which does not constitute a limitation on the present application.

[0047] The present application is further described below by way of specific examples. Unless otherwise specified, the various chemical reagents used in the examples of the present application were obtained through conventional commercial channels.

[0048] Example 1

[0049] A double-layer elastic composite mask base fabric, comprising an elastic fabric layer and a bottom film layer attached 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 gram weight of 26.8g / m 2 The bottom film layer is kapok fiber spunlace fabric with a gram weight of 27.1g / m 2 .

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

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

[0052] (2) Lay the PP / TPU elastic fabric layer and the kapok fiber spunlace fabric base film layer flat in a compounding machine, apply polypropylene hot melt adhesive, and press and bond them to obtain the double-layer elastic composite mask base fabric. The adhesive amount is 10g / m 2 , the glue gun temperature is 180℃, in the gluing 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, comprising an elastic fabric layer and a bottom film layer attached 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 gram weight of 26.7g / m 2 The bottom film layer is kapok fiber spunlace fabric with a gram weight of 27.1g / m 2 .

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

[0056] (1) PP and POE were melt-extruded after drying at 70°C, and then melt-blown to form a web to obtain a PP / POE elastic fabric layer. The screw speed during the melt extrusion process was 30 r / min; the screw temperatures in the first zone were 155°C, the second zone was 185°C, the third zone was 225°C, the fourth zone was 230°C, and the fifth zone was 230°C; the extrusion die temperature was 250°C; the hot air pressure during the spinning process was 20 MPa, the hot air temperature was 260°C, the cooling temperature was 13°C, and the winding speed was 20 m / min.

[0057] (2) Lay the PP / POE elastic fabric layer and the kapok fiber spunlace fabric base film layer flat in a compounding machine, apply polypropylene hot melt adhesive, and press and bond them to obtain the double-layer elastic composite mask base fabric. The adhesive amount is 10g / m 2 , the glue gun temperature is 180℃, in the gluing 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, comprising an elastic fabric layer and a bottom film layer attached to one side of the elastic fabric layer; wherein the elastic fabric layer is a POE meltblown fabric with a gram weight of 26.6g / m 2 The bottom film layer is kapok fiber spunlace fabric with a gram weight of 27.1g / m 2 .

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

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

[0062] (2) Lay the POE elastic fabric layer and the kapok fiber spunlace fabric base film layer flat in a compounding machine, apply ethylene-vinyl acetate copolymer hot melt adhesive, and press and bond them to obtain the double-layer elastic composite mask base fabric. The amount of adhesive applied is 2g / m 2 , the glue gun temperature is 130℃, in the gluing 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, comprising an elastic fabric layer and a bottom film layer attached to one side of the elastic fabric layer; wherein the elastic fabric layer is TPU meltblown fabric with a gram weight of 26.8g / m 2 The bottom film layer is kapok fiber spunlace fabric with a gram weight of 27.1g / m 2 .

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

[0066] (1) TPU (soft segment polycaprolactone diol, hard segment HDI) was melt-extruded after drying at 120°C, and then spun into a web using a melt-blowing method to obtain a TPU elastic fabric layer, as shown in the SEM image. Figure 2The screw speed during the melt extrusion process was 10 r / min; the screw temperatures in the first zone were 180°C, the second zone was 220°C, the third zone was 235°C, the fourth zone was 235°C, and the fifth zone was 235°C; the extrusion die temperature was 255°C; the hot air pressure during the spinning process was 10 MPa, the hot air temperature was 260°C, the cooling temperature was 25°C, and the winding speed was 10 m / min.

[0067] (2) The TPU elastic fabric layer and the kapok fiber spunlace fabric bottom film layer are laid flat in a compounding machine, coated with PUR reactive polyurethane hot melt adhesive, and pressed and bonded to obtain the double-layer elastic composite mask base fabric, as shown in the SEM image. Figure 1 As shown. Among them, the glue amount is 5g / m 2 , the glue gun temperature is 180℃, in the gluing 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, comprising an elastic fabric layer and a bottom film layer attached to one side of the elastic fabric layer; wherein the elastic fabric layer is TPEE meltblown fabric with a gram weight of 27.2g / m 2 The bottom film layer is kapok fiber spunlace fabric with a gram weight of 27.1g / m 2 .

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

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

[0072] (2) Lay the TPEE elastic fabric layer and the kapok fiber spunlace fabric base film layer flat in a compounding machine, apply polyamide hot melt adhesive, and press and bond them to obtain the double-layer elastic composite mask base fabric. The adhesive amount is 6g / m 2 , the glue gun temperature is 210℃, in the gluing 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, comprising an elastic fabric layer and a bottom film layer attached to one side of the elastic fabric layer; wherein the elastic fabric layer is a SEBS meltblown fabric with a gram weight of 27.1g / m 2 The bottom film layer is kapok fiber spunlace fabric with a gram weight of 27.1g / m 2 .

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

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

[0077] (2) Lay the TPU elastic fabric layer and the kapok fiber spunlace fabric base film layer flat in a compounding machine, apply ethylene-vinyl acetate copolymer hot melt adhesive, and press and bond them to obtain the double-layer elastic composite mask base fabric. The adhesive amount is 5g / m 2 , the glue gun temperature is 130℃, in the gluing 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 facial mask base fabric, which is different 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 facial mask base fabric, which is different 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 is different from Example 4 in that the weight of the TPU elastic fabric layer is 5g / m 2 .

[0084] Example 10

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

[0086] Example 11

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

[0088] Example 12

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

[0090] Example 13

[0091] A double-layer elastic composite mask base fabric, which is different from Example 5 in that the TPEE elastic fabric layer has a gram weight of 50.0 g / m 2 .

[0092] Example 14

[0093] A three-layer elastic composite mask base fabric, comprising an elastic fabric layer and a bottom film layer attached to both sides of the elastic fabric layer; wherein the elastic fabric layer is TPU meltblown fabric with a gram weight of 27.3g / m 2 The bottom film layer is kapok fiber spunlace fabric with a gram weight of 27.1g / m 2 .

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

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

[0096] (2) Lay a layer of TPU elastic fabric and two layers of kapok fiber spunlace fabric base film in a composite machine, apply PUR reactive polyurethane hot melt adhesive, and press and bond to obtain the double-layer elastic composite mask base fabric. The adhesive amount on both sides is 4g / m 2 , the glue gun temperature is 180℃, in the gluing 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 facial mask base fabric, which differs from Example 1 in that the elastic fabric layer is a PP / TPU (PP:TPU mass ratio is 40:60) meltblown fabric.

[0099] Example 16

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

[0101] Example 17

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

[0103] Example 18

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

[0105] Example 19

[0106] A double-layer elastic composite facial mask base fabric, which differs from Example 4 in that the composite method with the TPU elastic fabric layer and the kapok fiber spunlace fabric bottom film layer is a hot rolling bonding process, and the specific steps are: laying the TPU elastic fabric layer and the kapok fiber spunlace fabric bottom film layer flat in a hot rolling mill, and the hot rolling bonding temperature is 200°C, the pressure is 0.5 MPa, and the line speed is 10 m / min.

[0107] Example 20

[0108] A double-layer elastic composite mask base fabric, which differs from Example 4 in that the composite method with the TPU elastic fabric layer and the kapok fiber spunlace fabric bottom film layer is an ultrasonic reinforcement process. The specific steps are: laying the TPU elastic fabric layer and the kapok fiber spunlace fabric bottom film layer flat in an ultrasonic composite machine, and 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, comprising an elastic fabric layer and a bottom film layer attached to one side of the elastic fabric layer; wherein the elastic fabric layer is TPU spunbond fabric with a gram weight of 26.8g / m 2 The bottom film layer is kapok fiber spunlace fabric with a gram weight of 27.1g / m 2 The preparation method includes the following steps:

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

[0112] (2) Lay the TPU elastic fabric layer and the kapok fiber spunlace fabric base film layer flat in a compounding machine, apply PUR reactive polyurethane hot melt adhesive, and press and bond them to obtain the double-layer elastic composite mask base fabric. The amount of adhesive applied is 5g / m 2 , the glue gun temperature is 180℃, in the gluing 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 facial mask base fabric, which differs from Example 1 in that the elastic fabric layer is a PP / TPO (PP, TPO mass ratio 65:35) meltblown fabric.

[0115] Comparative Example 3

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

[0117] Comparative Example 4

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

[0119] Comparative Example 5

[0120] A double-layer elastic composite mask base fabric, which is different from Example 4 in that the elastic fabric layer is a TPU / POE / PP (TPU, POE, PP mass ratio 50:40:10) meltblown fabric, and the gram weight of the TPU / POE / PP elastic fabric layer is 26.7g / m 2 .

[0121] Comparative Example 6

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

[0123] Test Case

[0124] The weight, tensile strength, and elongation at break of the elastic fabrics obtained in step 1 of the above embodiment and comparative example were tested according to GB / T 24218.3, and 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 facial mask base fabric obtained in the above embodiment was tested according to GB / T 21655.1-2023. The test results are shown in Table 2 below.

[0128] Table 2

[0129]

[0130]

[0131] As shown in Tables 1 and 2, the facial mask base fabric prepared using the materials and methods of the present invention has high elasticity, can better fit the face, thereby promoting the absorption of essence, has better lifting and firming effects, is highly comfortable, has high strength, has high moisturizing properties, has strong liquid absorption and retention, can increase the load of essence, and can reduce the waste of essence.

[0132] In Comparative Example 1, the elastic fabric is spunbond fabric, and the moisturizing rate, tensile strength and elongation at break of the obtained facial mask base fabric are lower than those in Example 4, resulting in poor lifting and firming effect.

[0133] The meltblown cloth material in comparative examples 2-5 is different from that in the examples. The tensile strength, elongation at break and moisturizing rate of the obtained facial mask base cloth are worse than those in the examples. It can be seen that by selecting the meltblown cloth of the present application, a facial mask base cloth with high elasticity and better lifting and firming effect can be obtained.

[0134] The meltblown fabric in Comparative Example 6 had an excessively high weight. While the resulting mask base fabric exhibited superior tensile strength and moisture retention compared to Example 4, its elongation at break was significantly lower, resulting in decreased elasticity. The meltblown fabrics in Examples 9 and 10 had relatively low weights, resulting in lower tensile strength, elongation at break, and moisture retention. This suggests that the weight of the meltblown fabric significantly impacts its strength, elasticity, and moisture retention. Choosing a meltblown fabric (elastic fabric layer) with a specific weight can yield a mask base fabric with superior strength, elasticity, and moisture retention.

[0135] The meltblown cloth provided in the embodiments of the present application can be used to prepare facial mask base cloths with good moisture permeability, resilience, moisturizing and lifting and firming effects, thereby solving the technical problems to be solved in this application. When the meltblown cloth is selected from one, two, three or even more of PP, POE, TPU, TPEE and SEBS materials, as long as it meets the performance parameters (including gram 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 segments of different materials, this application will not list them one by one. Based on the clear technical concept of this application, those skilled in the art can infer that the above-mentioned meltblown cloths can achieve the technical effects of this application. In addition, when selecting different types of materials or materials with different segments, the selection range of their performance parameters is different. For example, when the material of the elastic cloth layer is selected as POE, the elastic cloth layer needs to meet the gram weight of 26 to 28 g / m 2 , moisture permeability is 4000~5000g / (m 2 · 24h), and the elastic recovery rate is 85-90%, in order to achieve the technical effect of the present application, but since there are many combinations of materials involved and many combinations of chain segments of different materials, this application will no longer list them one by one.

[0136] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, this application is not limited to the above-described embodiments. 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 scope of protection of this application.

Claims

1. A elastic composite facial mask base fabric, characterized in that: It includes an elastic fabric layer and a bottom film layer attached to one side or both sides of the elastic fabric layer; wherein, The elastic fabric layer is made of any one or more materials selected from PP, POE, TPU, TPEE, and SEBS; The elastic fabric layer meets the following requirements: gram weight 5-50g / m 2 , moisture permeability 1000~13000g / (m 2 24h), elastic recovery rate greater than 85%; The bottom film layer is any one of spunlace nonwoven fabric, woven fabric and knitted fabric.

2. The elastic composite facial 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 terminal segments and ethylene-butene copolymer middle elastic blocks.

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

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

5. The method for preparing the elastic composite facial mask base fabric according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Drying any one or more materials of PP, POE, TPU, TPEE, and SEBS at 60-120° C., melt-extruding, and spinning into a web by melt-blowing to obtain an elastic fabric layer; S2. Lay the elastic fabric layer and the bottom film layer flat in a laminating machine, and laminate them using any one of a gluing process, a hot rolling process, and an ultrasonic reinforcement process, and cool them to obtain the elastic composite facial mask base fabric.

6. The method for preparing the elastic composite facial mask base fabric according to claim 5, wherein: During the melt extrusion process of step S1, the screw speed is 5-30 r / min, the screw temperature in the first zone is 80-190°C, the second zone is 150-270°C, the third zone is 170-270°C, the fourth zone is 170-270°C, the fifth zone is 170-270°C, and the extrusion die head temperature is 200-280°C.

7. The method for preparing the elastic composite facial mask base fabric according to claim 5, wherein: The hot air pressure in the spinning web forming process 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.

8. The method for preparing the elastic composite facial mask base fabric according to claim 5, wherein: The compounding method in step S2 is a gluing and bonding process.

9. The method for preparing the elastic composite facial mask base fabric according to claim 5, wherein: The hot melt adhesive used in the gluing 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.

10. The method for preparing the elastic composite facial mask base fabric according to claim 5, characterized in that: In the gluing process, the amount of hot melt adhesive applied is 2 to 10 g / m 2 , the glue gun temperature is 130~210℃; in the gluing process, the composite extrusion pressure is 0.05MPa~0.8MPa, the tension is controlled at 4~20N, 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.

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