CN112155265A

CN112155265A - Elastic plane mask

Info

Publication number: CN112155265A
Application number: CN202011044343.XA
Authority: CN
Inventors: 庄碧原; 黄家齐; 陈小滨; 赖建春
Original assignee: Aab China Industry Co ltd
Current assignee: Aab China Industry Co ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-01-01

Abstract

The invention relates to the technical field of masks, and provides an elastic flat mask, comprising a mask body, wherein the mask body is provided with a barrier layer, a filter layer and a moisture-absorbing layer in sequence from outside to inside, and a nose bridge is arranged on one longitudinal side of the mask body The middle part of the mask body is longitudinally provided with a plurality of folds that are parallel to each other, and the width of the mask body can be adjusted by longitudinally stretching the folds when wearing. The ear part is an elastic non-woven fabric, the width of the hanging ear part is 20-40 mm, the length of the hanging ear part is 2-3 times the width of the mask body, and the side of the moisture-absorbing layer away from the filter layer is provided with a fitting The soft part of the human nose bridge curve, the soft part is below the nose bridge strip, the soft part is wave-shaped, and includes a first convex section, a concave section and a second convex section that are connected in sequence. It solves the problem that the ear straps of the disposable mask in the prior art easily cause the pressure and pain of the tissue behind the ear, which affects the overall comfort of the mask.

Description

Elastic plane mask

Technical Field

The invention relates to the technical field of masks, in particular to an elastic plane mask.

Background

The mask is a sanitary protective article, is worn at the mouth and nose part for filtering air entering the mouth and nose, and has the function of blocking harmful gas, spray, virus and other substances. Conventional mask structures generally include: the gauze mask body with locate the ear area of gauze mask body length direction both sides, gauze mask body middle part still is equipped with the fold district that is used for tensile dilatation. With the widespread use of masks, people have put higher demands on the masks, such as comfort, filtration efficiency, and the like. Chinese patent No.: 201920601452.3 discloses a mask, including the mask body, mask body both sides respectively with ear area fixed connection, the mask body is equipped with a plurality of horizontal folds and two vertical folds, the mask body includes two-layer non-woven fabrics, be equipped with the filter layer between the two-layer non-woven fabrics. The mask body is divided into the nose area and the side wing area by arranging the longitudinal pleats, and when the mask is used, the middle parts of the longitudinal pleats and the transverse pleats are unfolded to enlarge the space inside the mask, so that the breathing space is enlarged, and the air permeability and the comfort level of the mask are improved; in addition, when the mask needs to be stored, the longitudinal pleats and the transverse pleats are folded, so that the space is saved, and the mask is convenient to carry. The above patent improves the breathability and comfort of the mask by improving the mask body, but does not take into account the effect that the ear straps may have on the wearer. The ear belt is a thin rope which is generally processed by spandex yarn and terylene (or nylon) through the processes of knitting, weaving and the like, has small contact area with ears, is easy to cause the tissues behind the ears to be pressed and painful after being worn for a long time, can cause skin injury when being serious, influences continuous wearing and has the risk of infection.

Disclosure of Invention

Therefore, aiming at the above, the invention provides an elastic plane mask, which solves the problem that the ear band of the disposable mask in the prior art is easy to cause compression and pain of tissues behind ears, and the overall comfort of the mask is affected.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the utility model provides an elastic plane gauze mask, includes the gauze mask body, and the length direction of definition gauze mask body is horizontal, and width direction is vertical, gauze mask body outside-in stromatolite in proper order is equipped with barrier layer, filter layer and hygroscopic layer, vertical one side of gauze mask body is equipped with the bridge of the nose strip, the middle part of gauze mask body is provided with a plurality of folds that are parallel to each other on vertical, and the width that the gauze mask body can be adjusted to vertical tensile fold when wearing, the horizontal both sides of gauze mask body are equipped with the hangers portion, the hangers portion is elastic non-woven fabrics, the width of hangers portion is 20 ~ 40mm, the length of hangers portion is 2 ~ 3 times of gauze mask body width, the one side that the filter layer was kept away from to the hygroscopic layer is equipped with the curved soft portion of the human bridge of the nose of laminating, soft portion is in the below of bridge of the nose strip, soft portion, A concave section and a second convex section.

The further improvement is that: the width on moisture absorption layer is greater than barrier layer and filter layer, and the moisture absorption layer of the vertical one side of gauze mask body turns over the cladding on the edge surface of barrier layer, and the bridge of the nose strip is placed on the barrier layer surface of the vertical opposite side of gauze mask body, and barrier layer, filter layer and moisture absorption layer turn over the cladding bridge of the nose strip simultaneously, the position of fixed bridge of the nose strip.

The further improvement is that: the nose bridge strip is a metal nose bridge strip or an all-plastic nose bridge strip.

The further improvement is that: the soft part is medical polyurethane sponge.

The further improvement is that: the number of the folds is 3.

The further improvement is that: the filter layer is melt-blown non-woven fabric subjected to electret treatment.

The further improvement is that: the elastic non-woven fabric comprises a surface layer non-woven fabric, a middle layer non-woven fabric and a lower layer non-woven fabric which are sequentially stacked, wherein the surface layer non-woven fabric, the middle layer non-woven fabric and the lower layer non-woven fabric are bonded through hot pressing, the surface layer non-woven fabric and the lower layer non-woven fabric are hot air non-woven fabrics, and the middle layer non-woven fabric comprises the following raw materials in parts by: 35-45 parts of homopolymerized polypropylene, 25-35 parts of random copolymerization polypropylene, 10-20 parts of ethylene-vinyl acetate copolymer, 8-15 parts of maleic anhydride grafted polypropylene, 12-30 parts of inorganic filler, 0.4-0.8 part of antioxidant and 18-28 parts of polyvinylpyrrolidone.

The further improvement is that: the inorganic filler is nano-scale silicon dioxide or nano calcium carbonate.

The further improvement is that: the preparation method of the middle-layer non-woven fabric comprises the following steps:

(1) weighing the raw materials in parts by weight, and uniformly stirring and mixing;

(2) feeding the mixed raw materials into a double-screw extruder, heating and melting to form a uniform melt, and filtering to remove impurities in the melt;

(3) feeding the filtered melt into a spinning box for spinning, spraying the distributed melt from a spinneret plate, and cooling, forming, bundling, drafting, curling, heat setting and cutting to obtain elastic fibers;

(4) and (4) feeding the elastic fibers obtained in the step (3) into an air-laid machine, condensing to form a fiber web, and bonding by hot air to obtain the middle-layer non-woven fabric.

The further improvement is that: the temperature of each zone of the double-screw extruder is 165-185 ℃, 175-195 ℃, 180-200 ℃, 185-205 ℃, 190-210 ℃ and 180-200 ℃.

By adopting the technical scheme, the invention has the beneficial effects that:

(1) the ear hanging part of the mask prepared by the invention adopts the elastic non-woven fabric to replace a string processed by spandex yarn and terylene through the processes of knitting, weaving and the like in the traditional mask, the elastic non-woven fabric has good elasticity, is flat, has the width of 20-40 mm, has larger ear stress area when being worn, reduces the possibility of damaging the tissues behind the ears, and improves the comfort of wearing the mask for a long time.

(2) According to the mask, the soft part is arranged on the mask body and comprises the first convex section, the concave section and the second convex section which are sequentially connected, the soft part is in a wave shape and is attached to the curve of the bridge of the nose of a human body, the problem that in the prior art, the sealing performance is insufficient due to a large gap between the top end of the mask body and the face of a user can be solved, the protection capability of the mask is improved, the soft part is made of medical polyurethane sponge, the medical polyurethane sponge is soft in texture, safe and non-irritating, and the wearing comfort level can be improved; and the mask has strong water absorption, can absorb water vapor exhaled by the mouth and the nose of a wearer and keep the dryness between the mask and the face.

(3) Elasticity non-woven fabrics is including the surface course non-woven fabrics, intermediate level non-woven fabrics and the lower floor non-woven fabrics that stack gradually, surface course non-woven fabrics, intermediate level non-woven fabrics and lower floor non-woven fabrics pass through hot-pressing bonding, surface course non-woven fabrics and lower floor non-woven fabrics select for use fluffy, soft, the hot-blast non-woven fabrics that elasticity is good, and the elasticity non-woven fabrics that each layer non-woven fabrics complex formed has excellent elasticity, can satisfy the demand such as health supplies such. The middle-layer non-woven fabric comprises the following raw materials in parts by weight: 35-45 parts of homopolymerized polypropylene, 25-35 parts of random copolymerization polypropylene, 10-20 parts of ethylene-vinyl acetate copolymer, 8-15 parts of maleic anhydride grafted polypropylene, 12-30 parts of inorganic filler, 0.4-0.8 part of antioxidant and 18-28 parts of polyvinylpyrrolidone. The components in the formula have a synergistic effect while playing respective functions, wherein the ethylene-vinyl acetate copolymer is a good thermoplastic elastomer and can form an interpenetrating network structure with the homopolymerized polypropylene, so that the toughness and elasticity of the homopolymerized polypropylene are effectively enhanced. The random copolymerization polypropylene has strong shock resistance and good fluidity, and the addition of a certain amount of the random copolymerization polypropylene in the formula can also enhance the binding force of the ethylene-vinyl acetate copolymer and the homopolymerization polypropylene and improve the elasticity of the whole system. Inorganic fillers such as nano silicon dioxide, calcium carbonate and the like can also play a role in strengthening and toughening, and simultaneously, the dosage of the thermoplastic elastomer ethylene-vinyl acetate copolymer is reduced on the basis of meeting the toughening effect of the material, so that the cost is reduced. The invention simultaneously utilizes the toughening effect of the ethylene-vinyl acetate copolymer and the inorganic filler, combines organic matters and inorganic matters, and realizes better toughening effect.

(4) The production process of traditional gauze mask is earlier with preparation gauze mask body, and after the whole preparation of gauze mask body was accomplished and was concentrated, weld the both sides at the gauze mask body with the ear area again, and the preparation of gauze mask body and welding ear area separately go on in production process, and the process is more troublesome, and production speed is slower, and general steady speed is only 100 pieces/min. According to the invention, the elastic non-woven fabric is used as the ear hanging part, and is subjected to folding, point pressing and fixing, glue scraping, slitting and transferring processes, and finally ultrasonic welding is adopted on the mask body, so that the ear hanging part and the mask body are compounded on line, the production speed can reach 1000 pieces/min, and the problem of low speed of the traditional mask production process is solved.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is an exploded view of a mask body according to one embodiment of the present invention;

FIG. 3 is a schematic view of a hanger portion according to an embodiment of the present invention;

FIG. 4 is a flow chart of the production process of the present invention.

Detailed Description

The following detailed description will be provided for the embodiments of the present invention with reference to specific embodiments, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

Unless otherwise indicated, the techniques employed in the examples are conventional and well known to those skilled in the art, and the reagents and products employed are also commercially available. The source, trade name and if necessary the constituents of the reagents used are indicated at the first appearance.

Example one

Referring to fig. 1 to 3, an elastic flat mask comprises a mask body 1, wherein the length direction of the mask body 1 is defined as the transverse direction, the width direction is defined as the longitudinal direction, the mask body 1 is sequentially laminated from outside to inside with a barrier layer 11, a filter layer 12 and a moisture absorption layer 13, the barrier layer is a polypropylene spun-bonded non-woven fabric, and can effectively prevent liquid splashes, dust and other particles from entering; the filter layer is melt-blown non-woven fabric subjected to electret treatment, the melt-blown non-woven fabric is made of polypropylene superfine fibers and has good filtering performance and shielding performance, the electret treatment enables the melt-blown non-woven fabric to have electric charges, a large number of electrodes are formed among the charged fibers, the electrostatic adsorption is increased, and the filtering efficiency of substances such as particles, aerosol, spray and the like is improved; the moisture absorption layer is super gentle hydrophilic non-woven fabrics, can absorb the steam of wearing person's mouth nose exhalation. The utility model discloses a mask, including gauze mask body 1, the vertical one side of gauze mask body 1 is equipped with nose bridge strip 2, nose bridge strip 2 is plastic nose bridge strip, the width of moisture absorption layer 13 is greater than barrier layer 11 and filter layer 12, and the vertical one side of three layer construction flushes, places nose bridge strip 2 on this side barrier layer 11 surface, and barrier layer 11, filter layer 12 and moisture absorption layer 13 turn over a cladding nose bridge strip 2 simultaneously, the position of fixed nose bridge strip 2, and the moisture absorption layer 13 of the vertical opposite side of gauze mask body 1 turns over a cladding on the edge surface of barrier layer 11. The utility model discloses a mask, including gauze mask body 1, the middle part of gauze mask body 1 is provided with three fold 3 that are parallel to each other on vertical, and the width of gauze mask body can be adjusted to vertical tensile fold when wearing, the horizontal both sides of gauze mask body 1 are equipped with ears portion 4, ears portion 4's width is 20mm, ears portion 4's length is 3 times of gauze mask body 1 width, the one side that filter layer 12 was kept away from to moisture absorption layer 13 is equipped with the curved soft portion 5 of the human bridge of the nose of laminating, soft portion 5 is in the below of bridge of the nose strip 2, soft portion 5 is medical polyurethane sponge, soft portion 5 is the wave type, including consecutive first protruding section 51, concave segment 52 and the protruding section 53 of second.

The manufacturing process of the mask is as shown in fig. 4, when the mask body is manufactured, the elastic non-woven fabric is synchronously processed, the elastic non-woven fabric is folded, pressed and fixed, scraped, cut and transferred, and finally welded on the mask body by ultrasonic, so that the ear hanging part and the mask body are compounded on line, the production speed can reach 1000 pieces/min, and the problem of low speed of the traditional mask production process is solved. Then add the bridge of the nose strip, carry on the longitudinal seal, cut, pass the soft portion through the hot melt adhesive to adhere on the surface of the moisture absorption layer of the mask body at last.

The hangers 4 are elastic non-woven fabrics, including surface course non-woven fabrics 41, intermediate level non-woven fabrics 42 and lower floor's non-woven fabrics 43 that stack gradually, surface course non-woven fabrics 41, intermediate level non-woven fabrics 42 and lower floor's non-woven fabrics 43 pass through the hot-pressing bonding, surface course non-woven fabrics 41 and lower floor's non-woven fabrics 43 are hot-blast non-woven fabrics, the preparation method of intermediate level non-woven fabrics includes following step:

(1) weighing the following raw materials in parts by weight: 35 parts of homopolymerized polypropylene, 25 parts of random copolymerization polypropylene, 10 parts of ethylene-vinyl acetate copolymer, 8 parts of maleic anhydride grafted polypropylene, 12 parts of nano silicon dioxide, 1680.4 parts of antioxidant and 18 parts of polyvinylpyrrolidone, and stirring and mixing uniformly;

(2) feeding the mixed raw materials into a double-screw extruder, heating and melting to form a uniform melt, and filtering to remove impurities in the melt; the temperatures of the zones of the twin-screw extruder are 165 ℃, 175 ℃, 180 ℃, 185 ℃, 190 ℃ and 180 ℃.

(3) Feeding the filtered melt into a spinning manifold for spinning, wherein the temperature of the spinning manifold is 210 ℃, spraying the distributed melt from a spinneret plate, cooling, forming, bundling, drafting, curling, heat setting and cutting to obtain elastic fibers;

Example two

An elastic plane mask comprises a mask body, wherein the length direction of the mask body is defined to be transverse, the width direction of the mask body is longitudinal, a blocking layer, a filtering layer and a moisture absorption layer are sequentially arranged on the mask body in an outside-in laminated mode, a nose bridge strip is arranged on one longitudinal side of the mask body and is an all-plastic nose bridge strip, three mutually parallel folds are arranged in the middle of the mask body in the longitudinal direction, the width of the mask body can be adjusted by longitudinally stretching the folds when the mask is worn, lug portions are arranged on two transverse sides of the mask body and are 30mm wide, the length of each lug portion is 2.5 times of the width of the mask body, a soft portion attached to a human nose bridge curve is arranged on one surface, away from the filtering layer, of the moisture absorption layer, the soft portion is arranged below the nose bridge strip and is made of medical polyurethane sponge, and is in a wave shape, comprises a first convex section, a concave section and a second convex section which are connected in sequence.

The hanger part is elastic non-woven fabric, including surface course non-woven fabric, intermediate level non-woven fabric and the lower floor non-woven fabric that stacks gradually, surface course non-woven fabric, intermediate level non-woven fabric and lower floor non-woven fabric pass through hot-pressing bonding, surface course non-woven fabric and lower floor non-woven fabric are hot-blast non-woven fabric, the preparation method of intermediate level non-woven fabric includes following steps:

(1) weighing the following raw materials in parts by weight: 40 parts of homopolymerized polypropylene, 30 parts of random copolymerization polypropylene, 15 parts of ethylene-vinyl acetate copolymer, 12 parts of maleic anhydride grafted polypropylene, 21 parts of nano calcium carbonate, 10100.6 parts of antioxidant and 23 parts of polyvinylpyrrolidone, and stirring and mixing uniformly;

(2) feeding the mixed raw materials into a double-screw extruder, heating and melting to form a uniform melt, and filtering to remove impurities in the melt; the temperatures of the zones of the twin-screw extruder are 175 ℃, 185 ℃, 190 ℃, 195 ℃, 200 ℃ and 190 ℃.

EXAMPLE III

An elastic plane mask comprises a mask body, wherein the length direction of the mask body is defined to be transverse, the width direction of the mask body is longitudinal, a blocking layer, a filtering layer and a moisture absorption layer are sequentially arranged on the mask body in an outside-in laminating mode, a nose bridge strip is arranged on one longitudinal side of the mask body and is an all-plastic nose bridge strip, three mutually parallel folds are arranged in the middle of the mask body in the longitudinal direction, the width of the mask body can be adjusted by longitudinally stretching the folds when the mask is worn, lug portions are arranged on two transverse sides of the mask body and are 40mm wide, the length of each lug portion is 2 times of the width of the mask body, a soft portion attached to a human nose bridge curve is arranged on one surface, away from the filtering layer, of the moisture absorption layer, the soft portion is arranged below the nose bridge strip and is made of medical polyurethane sponge, and is in a wave shape, comprises a first convex section, a concave section and a second convex section which are connected in sequence.

(1) weighing the following raw materials in parts by weight: 45 parts of homopolymerized polypropylene, 35 parts of random copolymerization polypropylene, 20 parts of ethylene-vinyl acetate copolymer, 15 parts of maleic anhydride grafted polypropylene, 30 parts of nano silicon dioxide, 10760.8 parts of antioxidant and 28 parts of polyvinylpyrrolidone, and stirring and mixing uniformly;

(2) feeding the mixed raw materials into a double-screw extruder, heating and melting to form a uniform melt, and filtering to remove impurities in the melt; the temperatures of the zones of the twin-screw extruder were 185 ℃, 195 ℃, 200 ℃, 205 ℃, 210 ℃ and 200 ℃.

Performance testing

The elastic nonwoven fabrics prepared in examples one to three were subjected to the tests for breaking strength and elongation, and the test results are shown in table 1.

Comparative example 1

The utility model provides an elasticity non-woven fabrics, includes surface course non-woven fabrics, intermediate level non-woven fabrics and the lower floor non-woven fabrics that stacks gradually, surface course non-woven fabrics, intermediate level non-woven fabrics and lower floor non-woven fabrics pass through hot pressing bonding, surface course non-woven fabrics and lower floor non-woven fabrics are hot-blast non-woven fabrics, the intermediate level non-woven fabrics includes the raw materials of following parts by weight: 45 parts of homopolymerized polypropylene, 20 parts of ethylene-vinyl acetate copolymer, 15 parts of maleic anhydride grafted polypropylene, 30 parts of nano silicon dioxide, 10760.8 parts of antioxidant and 28 parts of polyvinylpyrrolidone. The preparation method of the middle layer non-woven fabric is the same as that of the embodiment.

Comparative example No. two

The utility model provides an elasticity non-woven fabrics, includes surface course non-woven fabrics, intermediate level non-woven fabrics and the lower floor non-woven fabrics that stacks gradually, surface course non-woven fabrics, intermediate level non-woven fabrics and lower floor non-woven fabrics pass through hot pressing bonding, surface course non-woven fabrics and lower floor non-woven fabrics are hot-blast non-woven fabrics, the intermediate level non-woven fabrics includes the raw materials of following parts by weight: 45 parts of homopolymerized polypropylene, 35 parts of random copolymerization polypropylene, 20 parts of ethylene-vinyl acetate copolymer, 15 parts of maleic anhydride grafted polypropylene, 10760.8 parts of antioxidant and 28 parts of polyvinylpyrrolidone. The preparation method of the middle layer non-woven fabric is the same as that of the embodiment.

TABLE 1

As can be seen from Table 1, the elastic nonwoven fabric prepared by the invention has good elongation at break and breaking strength, and the elasticity of the elastic nonwoven fabric can meet the requirements of disposable mask ear hanging materials. The third embodiment is compared with the comparative example, so that the intermediate layer non-woven fabric determines the optimal raw material combination and the proportion thereof, and the components in the formula have a synergistic effect besides playing respective functions, thereby showing better elasticity.

The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.

Claims

1. an elastic plane mask, comprising a mask body, the length direction of defining the mask body is horizontal, and the width direction is a longitudinal direction, it is characterized in that: described mask body is successively laminated and provided with barrier layer, filter layer and moisture absorption layer from outside to inside , the longitudinal side of the mask body is provided with a nose bridge, the middle of the mask body is longitudinally provided with a plurality of folds that are parallel to each other, and the width of the mask body can be adjusted by longitudinally stretching the folds when wearing. There are hanging ear parts on both sides of the lateral direction of the mask, the hanging ear parts are elastic non-woven fabrics, the width of the hanging ear parts is 20 to 40 mm, and the length of the hanging ear parts is 2 to 3 times the width of the mask body. The side of the moisture-absorbing layer away from the filter layer is provided with a soft part that fits the curve of the nose bridge of the human body. The soft part is below the nose bridge strip. The second convex segment.

2. An elastic plane mask according to claim 1, characterized in that: the width of the moisture-absorbing layer is greater than that of the barrier layer and the filter layer, and the moisture-absorbing layer on the longitudinal side of the mask body is folded over and wrapped around the edge surface of the barrier layer. On the surface of the barrier layer on the other longitudinal side of the mask body, a nose bridge strip is placed, and the barrier layer, the filter layer and the moisture absorption layer are folded to cover the nose bridge strip at the same time to fix the position of the nose bridge strip.

3. a kind of elastic plane mask according to claim 1, is characterized in that: described nose bridge strip is metal nose bridge strip or full plastic nose bridge strip.

4. An elastic plane mask according to claim 1, wherein the soft part is a medical polyurethane sponge.

5. A kind of elastic plane mask according to claim 1, is characterized in that: the number of described pleats is 3.

6. A kind of elastic plane mask according to claim 1, is characterized in that: described filter layer is the melt-blown non-woven fabric through electret treatment.

7. a kind of elastic plane mask according to claim 1 is characterized in that: described elastic non-woven fabric comprises surface layer non-woven fabric, middle layer non-woven fabric and lower layer non-woven fabric layered successively, and described surface layer non-woven fabric The non-woven fabric, the non-woven fabric of the middle layer and the non-woven fabric of the lower layer are bonded by hot pressing, the non-woven fabric of the surface layer and the non-woven fabric of the lower layer are both hot air non-woven fabrics, and the non-woven fabric of the middle layer includes the following parts by weight Raw materials: 35-45 parts of homopolypropylene, 25-35 parts of random copolymerized polypropylene, 10-20 parts of ethylene-vinyl acetate copolymer, 8-15 parts of maleic anhydride grafted polypropylene, 12-15 parts of inorganic filler 30 parts, 0.4-0.8 parts of antioxidant, 18-28 parts of polyvinylpyrrolidone.

8. a kind of elastic plane mask according to claim 7, is characterized in that: the preparation method of described middle layer non-woven fabric comprises the following steps:

(1) weigh each raw material by weight, stir and mix well;

(2) feeding the above-mentioned mixed raw materials into the twin-screw extruder, heating and melting to form a uniform melt, and filtering to remove impurities in the melt;

(3) feeding the filtered melt into the spinning box for spinning, and after dispensing, the melt is ejected from the spinneret, cooled, formed, bundled, drawn, crimped, heat-set, and cut to obtain elastic fibers;

(4) sending the elastic fibers obtained in step (3) into an air-laid machine, cohesion to form a fiber web, and hot air bonding to obtain an intermediate layer non-woven fabric.

9. An elastic plane mask according to claim 8, characterized in that: the temperature of each zone of the twin-screw extruder is 165-185 ℃, 175-195 ℃, 180-200 ℃, 185-205 ℃, 190～210℃, 180～200℃.