JP2019002081A - Mask and manufacturing method of the same - Google Patents

Abstract

To provide a mask capable of improving adhesion with a nose bridge while stimulation to the skin is suppressed and to provide a manufacturing method of the mask.SOLUTION: A mask 10 comprises: a mask body 16 which is constituted of a nonwoven fabric and has locking sections 14 locked to the ears; a flexible nose grip 22 provided along an upper end part of the mask body 16; and a nose abutting part 24 being a resin composition layer which is formed on an inner side of the mask body 16 along the nose grip 22 and has viscoelasticity. In a manufacturing method of the mask 10, the nose abutting part 24 being the resin composition layer is formed in the mask body 16 by forming the mask body 16 to which the flexible nose grip 22 is attached along the upper end part, heating and melting a thermoplastic material having viscoelasticity and applying the melted thermoplastic material in a belt shape on the inner side of the mask body 16 along the nose grip 22 to be solidified.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a mask and a mask manufacturing method.

  Wearing the mask can suppress the inhalation and scattering of viruses and bacteria. However, if the wearing position of the mask is shifted due to movement of the wearer's mouth when coughing or talking, a gap will be created between the mask and the wearer's face, especially the nose bridge, and inhalation and scattering of viruses and bacteria. There is a possibility that the effect of suppressing the above cannot be sufficiently exhibited.

  In order to solve this problem, for example, Patent Document 1 discloses a mask that suppresses the generation of a gap between the face by sticking an adhesive layer provided at the upper end to the face of the wearer. Yes. Patent Document 2 discloses a mask that has improved adhesion to the nose bridge by providing urethane foam at the upper end.

JP 2006-288650 A JP 2014-30654 A

  However, in the mask disclosed in Patent Document 1, since the adhesive layer is attached to the wearer's face, there is a possibility that irritation is applied to the skin when the mask is detached. In the mask disclosed in Patent Document 2, the urethane foam may not be sufficiently adhered depending on the shape and size of the wearer's nasal bridge, resulting in individual differences in adhesion.

  An object of this invention is to provide the mask which can improve the adhesiveness with a nasal bridge, suppressing the irritation | stimulation to skin, and the manufacturing method of a mask in view of the said fact.

  The mask according to claim 1 is composed of a non-woven fabric and has a mask body having a locking portion locked to an ear or a head, and a flexible nose grip provided along an upper end portion of the mask body. And a nose pad portion that is a resin composition layer having a viscoelasticity formed inside the mask body along the nose grip.

  According to the said structure, a flexible nose grip is provided along the upper end part of a mask main body, and the nosepiece part which is a resin composition layer which has viscoelasticity along the nose grip is formed. For this reason, when the mask is worn, the nose grip follows the shape of the nose bridge, and the gap between the nose grip and the nose bridge is closed by the nose pad, so that the adhesion between the mask and the face can be maintained.

  The mask of Claim 2 is a mask of Claim 1, Comprising: The said nose pad part is comprised with the material whose viscosity is 0.5gf-4.0gf, and width is 1.6 mm ~. The thickness is 7.9 mm and the thickness is 0.6 mm to 4.0 mm.

  According to the above configuration, the nosepiece is made of a material having a viscosity of 0.5 gf to 4.0 gf, a width of 1.6 mm to 7.9 mm, and a thickness of 0.6 mm to 4.0 mm. Has been. For this reason, it is possible to suppress a sense of incongruity and skin damage caused by the nose pad portion sticking to the face while maintaining the adhesion between the mask and the face.

  The method for manufacturing a mask according to claim 3, wherein a mask main body having a flexible nose grip attached along an upper end is molded, a viscoelastic thermoplastic material is heated and melted, and the melted thermoplastic A material is applied along the nose grip in the form of a band on the inside of the mask body and solidified to form a nose pad portion that is a resin composition layer on the mask body.

  According to the said structure, after shape | molding a mask main body, a nose pad part can be formed in a mask main body by apply | coating and solidifying the molten thermoplastic material to a mask main body. For this reason, a nose pad part can be adhere | attached on a mask main body, without using a tape, an adhesive agent, etc.

  ADVANTAGE OF THE INVENTION According to this invention, the mask and the manufacturing method of a mask which can improve adhesiveness with a nasal bridge while suppressing irritation | stimulation to skin can be provided.

It is a top view which shows the structure which looked at the mask in an example of embodiment of this invention from the inner side. It is the XX sectional view taken on the line in FIG. It is a schematic perspective view which shows the state which wore the mask in an example of embodiment of this invention. It is a table | surface which shows the performance of the mask in an Example and a comparative example, respectively.

  Hereinafter, an example of a mask and a mask manufacturing method according to an embodiment of the present invention will be described with reference to FIGS.

(Construction)
The mask 10 of this embodiment is provided with the rectangular mask main body 16 which has the latching | locking part 14 which consists of the two rubber strings 12 in right-and-left both ends (longitudinal direction both ends), as shown in FIGS. ing.

  The mask body 16 is held at a position that covers the wearer's nasal bridge and mouth by the locking portion 14 being locked to the wearer's ear when the mask 10 is worn. In addition, the latching | locking part 14 may be made into one rubber cord etc. which are hung on a wearer's head.

  The mask body 16 is composed of a nonwoven fabric in which a plurality of (three in the present embodiment) pleats 18 are formed along the longitudinal direction, and can be expanded in the short direction. The mask body 16 is composed of a nonwoven fabric laminated in a plurality of layers, and examples of the material of the nonwoven fabric include polypropylene, polyethylene, nylon, rayon, paper, and a mixture thereof.

  Examples of the spinning method of the nonwoven fabric include a spunbond method, a thermal bond method, a melt blown method, a spunlace method, and a wet blending method. At the upper end portion and the lower end portion of the mask body 16, the nonwoven fabric is folded outward (the surface side opposite to the surface in contact with the wearer's face), and along the welding lines 20A, 20B, 20C extending in the longitudinal direction. It is welded.

  Note that, at the upper end of the mask body 16, the welding wires 20A and 20B extend in parallel with a space therebetween, and a nose grip 22 is embedded between the two welding wires 20A and 20B.

  The nose grip 22 is made of a flat and flat strip-shaped aluminum having flexibility, and is disposed along the upper end side of the mask body 16. As shown in FIG. 1, both ends in the longitudinal direction from the nose grip 22 at the upper end of the mask body 16 are welded along a welding line 20 </ b> D in which the nonwoven fabric extends in the short direction, and the nose grip 22 is attached to the mask body 16. It is held at the center in the longitudinal direction at the upper end.

  In addition, as a material which comprises the nose grip 22, various materials, such as what coated resin with resin, iron, and an iron core other than aluminum, can be used. Moreover, it should just have the flexibility which can be bent easily by hand, and a shape is not restricted to a flat circle shape.

  In addition, a nose pad portion 24 is provided along the nose grip 22 inside the upper end portion of the mask body 16 (the surface side in contact with the wearer's face). The nose pad portion 24 is composed of a resin composition layer having a viscosity of 0.5 gf to 4.0 gf, and particularly composed of a thermoplastic resin.

  As shown in FIG. 2, the cross section of the nose pad portion 24 has a substantially trapezoidal shape, and the width of the surface in contact with the mask main body 16 is slightly larger than the width of the nose grip 22. Specifically, the nosepiece 24 has a width of 1.6 mm to 7.9 mm and a thickness of 0.6 mm to 4.0 mm.

  Further, the length of the nose pad portion 24 in the longitudinal direction is longer than the length of the nose grip 22 in the longitudinal direction. When the mask 10 is not worn, the nose pad portion 24 may be covered with a release paper (not shown). Thereby, it can suppress that the nose pad part 24 adheres to the nose pad part 24 of the other mask 10. FIG.

  In addition, the structure of the mask 10 is not restricted to the said embodiment, For example, the side cover which suppresses that air leaks sideways may be attached to the longitudinal direction both ends of the mask main body 16. FIG.

(Production method)
When manufacturing the mask 10 of this embodiment, first, the pleat 18 is formed by returning the nonwoven fabric a plurality of times along the longitudinal direction. Next, the lower end portion of the nonwoven fabric is folded and welded along the weld line 20C, and the upper end portion of the nonwoven fabric is folded so as to embed the nose grip 22, and the nose grip 22 is sandwiched between the weld wires 20A and 20B. Weld along.

  Further, both ends in the longitudinal direction of the nonwoven fabric nose grip 22 are welded along the welding wire 20D. Further, both the left and right ends of the nonwoven fabric are welded, and the both ends of the rubber cord 12 are attached to the left and right ends of the nonwoven fabric to form the locking portions 14. The mask body 16 is formed by the above process.

  Next, a thermoplastic material is put into a glue gun (not shown) heated to about 170 ° C. to melt the thermoplastic material, and the molten thermoplastic material is stranded with the glue gun inside the mask body 16 along the nose grip 22. Extrude into a shape (band) and apply. Note that the glue gun is configured to be able to apply a molten thermoplastic material continuously or intermittently.

  At this time, the nonwoven fabric of the mask body 16 is melted by the heat of the thermoplastic material, and the thermoplastic material and the nonwoven fabric are bonded. Thereafter, the thermoplastic material applied to the inside of the mask main body 16 is solidified while being pressed with a flat plate (not shown) through a release paper, thereby improving the adhesion between the thermoplastic material and the nonwoven fabric and molding the thermoplastic material. Thus, the nose pad portion 24 is formed.

  When the thermoplastic material is solidified, it may be cooled and solidified by a separately provided cooling device, or may be solidified by natural cooling. The mask 10 is manufactured through the above steps.

  When the wearer wears the mask 10, as shown in FIG. 3, the rubber string 12 is locked to the ear and the nose grip 22 is bent according to the shape of the nasal bridge, and the nasal bridge and the mouth are covered by the mask body 16. At this time, the nose pad portion 24 provided inside the mask body 16 along the nose grip 22 is in close contact with the nose bridge, and the gap between the nose grip and the nose bridge is closed.

(Function and effect)
According to the present embodiment, the flexible nose grip 22 is provided along the upper end portion of the mask main body 16, and the nose pad portion 24 having viscoelasticity is formed along the nose grip 22.

  For this reason, when the mask 10 is worn, the nose grip 22 follows the shape of the nose bridge, and the gap between the nose grip 22 and the nose bridge is blocked by the nose pad portion 24, so that the adhesion between the mask 10 and the face is maintained. Can do.

  Further, the viscosity of the resin composition layer constituting the nosepiece part 24 is 0.5 gf to 4.0 gf, the width of the nosepiece part 24 is 1.6 mm to 7.9 mm, and the thickness is 0.00. It is set as 6 mm-4.0 mm. For this reason, discomfort and skin damage due to the nose pad portion 24 sticking to the face can be suppressed while maintaining the adhesion between the mask 10 and the face.

  Note that the width (the width of the surface in contact with the mask main body 16) and the length of the nose pad portion 24 are larger than the width and the length of the nose grip 22. For this reason, it can suppress that the nose grip 22 contact | abuts to a nose bridge directly, and can maintain the adhesiveness of the mask 10 and a face more.

  Further, according to the present embodiment, after the mask body 16 is molded, the molten thermoplastic material is applied along the nose grip 22 inside the mask body 16 in the form of a strand (band) and solidified. A nose pad portion 24 is formed in the main body 16. For this reason, the nose pad part 24 can be adhere | attached on the mask main body 16 without using a tape, an adhesive agent, etc.

  Hereinafter, Examples 1 to 10 and Comparative Examples 1 to 7 of the present invention will be specifically described with reference to FIG. In the examples and comparative examples, the mask performance was evaluated for 5 items of fog resistance, leakage rate, skin sensitization, adhesiveness, and wearing feeling.

  Specifically, with respect to fog resistance, a mask 10 and glasses that have been aged in advance in a constant temperature and humidity room controlled at 20 ° C. and 65% are attached, and the fogging of the glasses is evaluated. In FIG. 4, a state in which the field of vision is almost disappeared due to cloudiness is denoted by “X”, a state in which the field of vision is not lost but is difficult to see is denoted by Δ, and a state in which a normal field of view is hardly observed is ensured.

  As for the leak rate, the leak rate in the state where the mask 10 is worn is measured based on the leak rate test method for respiratory protective equipment of JIS T-8159. In addition, the measurement performs the same test 4 times. The higher the numerical value, the greater the leakage that occurs when the mask 10 is worn.

  For skin sensitization, ask 10 subjects to repeat the attachment and detachment of the mask 10 three times and evaluate the discomfort felt on the skin. In FIG. 4, a case where pain or feel that peels the skin occurs is indicated as “X”, a case where there is no strong stickiness or pain but there is a sense of incongruity, and a case where there is no sense of incongruity is indicated as “◯”.

  Regarding the adhesiveness, the test subject's impressions are interviewed in the process of skin sensitization described above. In FIG. 4, the case where there is a strong stickiness and there is a sense of incongruity is “Yes”, the case where there is a slight stickiness, but the case where there is no concern is “Slightly”, and the case where it does not stick at all is “None”.

  About wearing feeling, ask 10 test subjects to wear the mask 10, and listen and investigate. In FIG. 4, when the air feels very leaking, “gap large” or “insufficiently pressed”, when it feels almost no leak is “small gap”, and when it does not leak at all, “no gap” To do.

Example 1
In Example 1, a polypropylene spunbond nonwoven fabric with a basis weight of 25 g, a polypropylene meltblown nonwoven fabric with a basis weight of 20 g, and a thermal bond nonwoven fabric with a basis weight of 18 g were laminated to form a mask body 16 having a width of 175 mm.

  Further, a polyethylene nose grip 22 having a width of 4.0 mm and a thickness of 0.6 mm is embedded in the mask main body 16, and a resin material having an adhesiveness of 0.5 gf to 4.0 gf along the nose grip 22. A nose pad portion 24 having a width of 4.0 mm, a thickness of 2 mm, and a length of 130 mm was formed by A, and the mask 10 of Example 1 was manufactured.

  As can be seen from FIG. 4, in the mask 10 of Example 1, the glasses were hardly clouded, the air leakage during breathing was slight, and there was almost no sense of incongruity when worn. Moreover, since the nose pad part 24 has moderate adhesiveness, an individual difference did not arise in the adhesiveness to a wearer's nasal bridge.

(Examples 2 to 4)
In Example 2, the width of the nose pad portion 24 was 5.0 mm, and the thickness was 1.0 mm. In Example 3, the width of the nose pad portion 24 was 5.0 mm, and the thickness was 4.0 mm. In Example 4, the length of the nose pad portion 24 was 160 mm.

  In Examples 2 to 4, other conditions were the same as those in Example 1. As can be seen from FIG. 4, in the masks 10 of Examples 2 to 4, as in Example 1, the glasses were hardly clouded, there was little air leakage during breathing, and there was almost no sense of incongruity during wearing. .

(Examples 5 to 8)
In Example 5, the nose pad portion 24 was formed of a resin material B different from the resin material A. In Example 6, the nose pad portion 24 was formed of a resin material C different from the resin materials A and B. In Example 7, the nose pad portion 24 was formed by adding 5 parts of Esso Petroleum resin escollet to 95 parts of the resin material D different from the resin materials A to C.

  In Example 8, 30 parts of ethylene propylene rubber having a melt index (MI) of 10 and 10 parts of petroleum resin made by Esso Petroleum were added to 60 parts of an ethylene ethyl acrylate copolymer having a melt index (MI) of 50. A nose pad 24 was formed. In Examples 5 to 8, the adhesiveness of the nose pad portion 24 was 0.5 gf to 4.0 gf. In addition, the tackifier was used for petroleum resin.

  In Examples 5 to 8, the other conditions were the same as those in Example 1. As can be seen from FIG. 4, in the masks 10 of Examples 5 to 8, as in Example 1, the glasses were hardly clouded, there was little air leakage during breathing, and there was little discomfort during wearing. .

Example 9
In Example 9, the divided nose grip 22 was intermittently embedded along the upper end side of the mask body 16, and the nose pad portion 24 was intermittently formed along the nose grip 22. The other conditions were the same as those in Example 1.

  As can be seen from FIG. 4, even when the nose grip 22 and the nosepiece 24 are intermittently formed on the mask body 16, the glasses are hardly clouded as in the first embodiment, and air leaks during breathing. There was little, and there was almost no sense of incongruity at the time of wearing.

(Example 10)
In Example 10, the resin material A was mixed with nitrogen gas and foamed, and the nose pad portion 24 was formed using the foamed resin material A. The other conditions were the same as those in Example 1, and the adhesiveness of the nose pad portion 24 was 0.5 gf to 4.0 gf.

  As can be seen from FIG. 4, even when the nosepiece 24 is formed using a foamed thermoplastic material, the glasses are hardly clouded and the air leakage during breathing is small as in the case of Example 1. There was little uncomfortable feeling when worn.

(Comparative Example 1)
In Comparative Example 1, a mask was produced under the same conditions as in Example 1 except that the nose pad portion was eliminated. As can be seen from FIG. 4, in the mask of Comparative Example 1 having no nose pad portion, a large gap was generated between the mask and the nasal bridge, the glasses became cloudy, and a large air leak occurred during breathing.

(Comparative Example 2)
In Comparative Example 2, a mask was produced under the same conditions as in Example 1 except that the nose pad was formed of a resin material having an adhesiveness of 10 to 20 gf. As can be seen from FIG. 4, in the mask of Comparative Example 2 in which the adhesiveness of the nose pad is 10 to 20 gf, there is no cloudiness of the glasses and no air leakage during breathing, but the nose pad part is strongly attached to the face and pain There was a sense of incongruity.

(Comparative Example 3)
In Comparative Example 3, a mask was produced under the same conditions as in Example 1 except that the nose pads were formed from non-adhesive urethane foam. As can be seen from FIG. 4, in the mask of Comparative Example 3 in which the nose pad is made of urethane foam, there are individual differences in the wearing feeling, the air leakage rate, etc., depending on the shape and size of the wearer's (subject) nose bridge. It was.

(Comparative Examples 4-6)
In Comparative Example 4, the width of the nose pad was 1.5 mm and the thickness was 0.5 mm. In Comparative Example 5, the width of the nose pad was 8.0 mm and the thickness was 4.0 mm. In Comparative Example 6, the length of the nose pad was 50 mm. In Comparative Examples 4 to 6, the other conditions were the same as those in Example 1.

  As can be seen from FIG. 4, in the mask of Comparative Example 4 in which the width of the nose pad is 1.5 mm and the thickness is 0.5 mm, the adhesive force of the nose pad is weak and a large gap is formed between the mask and the nose bridge. As a result, the glasses became cloudy and a large air leak occurred during breathing.

  Further, in the mask of Comparative Example 5 in which the width of the nose pad is 8.0 mm and the thickness is 4.0 mm, the nose pad is strongly adhered to the face, although there is no fogging of glasses or air leakage during breathing. There was a sense of incongruity. Furthermore, in the mask of Comparative Example 6 in which the length of the nose pad portion is 50 mm, the adhesive force to the face of the nose pad portion is weak, and a large gap is generated between the mask and the nose bridge, so that a large amount of air leaks during breathing. It was happening.

(Comparative Example 7)
In Comparative Example 7, 70 parts of an ethylene vinyl acetate copolymer having a melt index (MI) of 10 containing 10% vinyl acetate, 25 parts of ethylene propylene rubber having a melt index (MI) of 10, and petroleum manufactured by Esso Petroleum A nose pad was formed by adding 5 parts of resin. In addition, the petroleum resin used the tack fire and the adhesiveness of the nose pad part was 0.1gf-0.4gf. Other conditions were the same as those in Example 1.

  As can be seen from FIG. 4, in the mask of Comparative Example 7 in which the adhesiveness of the nose pad is 0.1 gf to 0.4 gf, the adhesive force of the nose pad part is weak, and a large gap is generated between the mask and the nose bridge. The glasses were clouded and a large air leak occurred during breathing.

DESCRIPTION OF SYMBOLS 10 Mask 14 Locking part 16 Mask main body 22 Nose grip 24 Nose pad part

Claims (3)

A mask body comprising a non-woven fabric and having a locking portion locked to the ear or the head;
A flexible nose grip provided along the upper end of the mask body;
A nosepiece portion that is a resin composition layer having a viscoelasticity formed inside the mask body along the nose grip;
A mask comprising   The nose pad is made of a material having a viscosity of 0.5 gf to 4.0 gf, a width of 1.6 mm to 7.9 mm, and a thickness of 0.6 mm to 4.0 mm. Item 10. The mask according to Item 1. Mold the mask body with a flexible nose grip along the top edge,
Heating and melting a thermoplastic material having viscoelasticity,
The molten thermoplastic material is applied to the inside of the mask body along the nose grip and solidified to form a nose pad portion that is a resin composition layer on the mask body.
Mask manufacturing method.