JP5632149B2 - mask - Google Patents

Description

  The present invention relates to a mask that covers a part of a face including a mouth and a nostril and has ear hooks on both right and left ends.

  2. Description of the Related Art Conventionally, a mask is widely known in which an ear hooking part made of a rubber string or the like is attached to a main body part made of gauze or non-woven fabric covering a part of the face including the mouth and nostril. In addition, a mask having a bulging shape that matches the height of the nose by sewing a cutting line in the center has been proposed (Patent Document 1). Further, there has been proposed a mask in which a main body portion covering a part of a face including a mouth and a nostril is made of a low-resilience polyurethane foam (Patent Document 2). Further, there has been proposed a mask composed of a single breathable sheet material having a three-layer structure in which base sheets are laminated on both surfaces of an inner surface material to impart longitudinal and lateral stretchability (Patent Document 3). .

  However, the conventional masks have other problems, although the problems that each mask is aimed at are improved. For example, when the main body and the ear hook are in separate masks, there is a problem that the number of man-hours such as integration of the main body and the ear hook is required, which is expensive. Further, in the mask made of gauze or non-woven fabric, there is a problem that a gap is easily generated at the contact portion with the face, and the friction resistance at the contact portion is low, so that the mask is liable to shift during use. Moreover, in the case of a mask made of low-resilience polyurethane foam, if the film removal treatment is not performed, the problem of feeling uncomfortable due to low air permeability, and the low-resilience polyurethane foam itself is expensive, so the mask is expensive. There is a problem. In addition, the mask having a three-layer structure has a problem that it is expensive due to a large number of manufacturing steps.

Japanese Utility Model Publication No. 53-4799 JP 2008-136754 A JP 2007-14577 A

  The present invention has been made in view of the above points, and an object of the present invention is to provide an inexpensive mask that is not easily displaced during use, has good air permeability and excellent usability, and has a small number of manufacturing steps.

The invention of claim 1 is a mask that covers a part of the face including the mouth and nostril and has ear hooks on both right and left ends, has elasticity, has an elongation of 200% to 500%, and has 80 cells. 2 sheets with an opening as an ear hook on one end of a sheet-like polyester polyurethane foam with a film removal of 25/110 mm / 25 mm or less and an outwardly bulging curved section on the other end When the two mask halves are heat-welded at the curved shape portion, the curved shape portion joined by the heat welding becomes a portion that bulges outward when the two mask halves are spread. It is characterized by being formed of polyurethane foam that has been film-removed from the protruding part to the ear hooks on the left and right ends.

  According to the present invention, since a mask is formed by joining two sheet-like mask halves made of a polyurethane foam having elasticity removed, when manufacturing a mask, It is only necessary to join the mask halves with curved parts, and it is not necessary to attach the ear hooks separately, so there is only one kind of material and the number of parts is as few as two, so the number of manufacturing steps is small and the mask is inexpensive. Become. In addition, polyurethane foam with elasticity removed from the polyurethane foam itself has good elasticity without direction and good frictional resistance, and the tip of the nose when a mask is worn on the face. The curved shape part of the two mask halves joined to cover the side and the vicinity of the mouth bulge outward when the two mask halves are spread out, so that the periphery of the mask is the face It becomes difficult to shift due to the frictional resistance at the contact portion. Furthermore, since the polyurethane foam having elasticity is removed, it has a three-dimensional network structure by removing the cell membrane, so it has good breathability, and it is difficult to feel breathlessness when using the mask, The feeling of use is good.

It is a perspective view of the mask concerning one embodiment of the present invention. FIG. 2 is a perspective view showing a state in which two mask halves are overlaid on the mask of FIG. 1. It is a figure which shows the process at the time of manufacturing the mask of FIG. It is a top view which shows the shape of the mask half body of an Example.

  Hereinafter, embodiments of the mask of the present invention will be described with reference to the drawings. A mask 10 shown in FIGS. 1 and 2 covers a part of the face including the mouth and nostrils, and has ear hooks 13 on both right and left sides. Two mask-shaped mask halves 11 and 11 are provided. Consists of joints.

  The mask half 11 is in the form of a sheet from which a polyurethane foam having elasticity is removed. The polyurethane foam having elasticity may be either polyether-based or polyester-based, but if it is polyester-based, the two mask halves 11 and 11 can be joined by welding, which is a concern for health. Bonding is possible without using any adhesive. Further, the removal of the polyurethane foam having elasticity is removal of the cell membrane of the polyurethane foam, and is performed by a known film removal treatment, for example, a method of dissolving the cell membrane with a solvent, a method of destroying the cell membrane by explosion, or the like.

  The film obtained by removing the polyurethane foam having elasticity has an elongation (JIS K6400-5: 2004 dumbbell type 2) of 200% to 500% and the number of cells (JIS K6400-1: 2004 appendix 1 (reference)). ) Is more preferably 40 pieces / 25 mm or more and 110 pieces / 25 mm or less. When the elongation percentage is within the above range, the peripheral edge of the mask 10 is more closely adhered to the face, a gap is less likely to be formed between the face, the ear-hanging portion is difficult to cut, and the ear is less likely to hurt. Further, if the number of cells is within the above range, the peripheral surface of the mask 10 has a better frictional resistance with respect to prevention of mask displacement, and does not give a rough feeling to the skin. The feeling is not felt and a better wearing feeling is obtained. If the number of cells is less than 40/25 mm, the dust collection rate of pollen and the like is reduced, and the polyurethane foam having a number of cells larger than 110/25 mm is difficult to manufacture and is not practical.

  The thickness of the mask half 11, that is, the thickness of the film obtained by removing the polyurethane foam having elasticity is preferably 1 to 4 mm. When the thickness is less than 1 mm, it is difficult to handle, and when the mask 11 is attached to the face, it is easy to break. On the other hand, when the thickness is thicker than 4 mm, it becomes bulky and difficult to handle, and the cost of the mask increases.

  The shape of the mask half 11 is divided into two at an intermediate position in the left-right direction of the mask 10, an opening 13a is formed as an ear hook 13 on one end 11a side, and bulges outward on the other end 11b. The curved shape portion 15 is formed. In the illustrated embodiment, as shown in FIG. 2, the width (use) from the substantially intermediate position M1 on the left and right sides (length direction) of the mask half body 11 toward the other end 11b where the curved portion 15 is formed. It has a shape in which the vertical width at the time is enlarged.

  The opening 13a as the ear hook 13 comprises a through hole, and is formed in a size that allows the ear to be inserted and hooked on the ear when the mask 10 is attached to the face. The shape of the opening 13a is not particularly limited as long as it is a hole having a size allowing insertion of an ear. For example, a hole having an appropriate shape such as a circle, a rectangle, an ellipse, or the like is given. Further, the distance d between the opening 13a and the outer peripheral edge of the mask half 11 is set to 2 mm or more at the narrowest portion, and when the ear hook 13 is pulled, it is difficult to break near the ear hook 13. It is preferable to do this.

  The curved portion 15 is a portion where the two mask halves 11 and 11 are joined. Since the curved shape portion 15 has a curved shape that bulges outward (that is, a substantially arc shape), after the two mask halves 11 are joined by the curved shape portion 15, the two masks are formed. When the halves 11 and 11 are spread, the joined curved portion 15 bulges outward from the mask. Further, since the joined curved shape portion 15 is located at the left and right intermediate position of the mask 10 and is located at a position corresponding to the tip of the nose and mouth when the mask 10 is attached to the face, the bulging outward As a result, the mask 10 bulges outward at the nose position, the edge of the mask easily adheres to the face near the nose column, the periphery of the mask 10 adheres to the face, and around the nostrils and mouth. A space is formed and it is easy to breathe. In addition, the said curved shape part 15 does not need to become the shape where all the parts curved, and one part may become linear form. In particular, if a part of the portion that contacts the nose from the nasal column is linear, a better wearing feeling can be obtained.

  The joining in the curved shape portions 15 and 15 is performed by an adhesive, welding, hot melt or the like. The welding includes thermal welding, vibration welding, ultrasonic welding, laser welding and the like. In particular, joining by welding such as heat welding is preferable because it does not require the use of a solvent that has health concerns such as an adhesive. In addition, when joining by welding, what removed the film from the polyurethane foam which has the elasticity which comprises the said mask half body 11 is comprised with a polyester-type polyurethane foam. Polyester polyurethane foam is suitable for heat welding.

  The manufacture of the mask 10 will be briefly described with reference to FIG. The mask 10 is manufactured by forming the two mask halves 11 and 11 by punching or the like from a sheet obtained by removing the polyurethane foam having elasticity, and forming the two mask halves 11 and 11 in FIG. As shown in (3-1) and (3-2), the curved shape portions 15 and 15 of the mask halves 11 and 11 are joined by adhesive or welding as shown in (3-3) of FIG. The mask 10 is used. In addition, when joining the said curved shape parts 15 and 15 by heat welding, it carries out by pinching | interposing the curved shape parts 15 and 15 of the said mask half bodies 11 and 11 with the hot platen. The temperature of the hot plate at that time is set to a temperature at which the polyurethane foam having elasticity can be thermally welded.

Example 1
Film-removed flexible polyurethane foam (manufactured by Inoac Corporation, product name: MF-80A, polyester, elongation: 500%, number of cells: 80/25 mm) is cut into a sheet having a thickness of 2 mm and punched from this sheet Thus, two mask halves having the shape shown in FIG. 4 were formed. Two mask halves were stacked, the curved portion was sandwiched between hot plates, and joined by thermal welding to form an adult mask of Example 1. The joining width (joining amount) of the curved portion is 3 mm.

・Reference Example 2
A reference example was made in the same manner as in Example 1 by using a flexible polyurethane foam with a film removed (manufactured by INOAC CORPORATION, product name: MF-40, polyester, elongation: 200%, number of cells: 40/25 mm). Two adult masks were formed.

・Reference Example 3
A reference example was made in the same manner as in Example 1 by using a flexible polyurethane foam having a film removed (manufactured by Inoac Corporation, product name: MF-50, polyester type, elongation: 300%, number of cells: 50/25 mm). Three adult masks were formed.

Example 4
An example was carried out in the same manner as in Example 1 by using a flexible polyurethane foam having a film removed (manufactured by Inoac Corporation, product name: MF-110, polyester type, elongation: 500%, number of cells: 110/25 mm). Four adult masks were formed.

Comparative Example Using a low-resilience polyurethane foam that is not film-removed (product name: EGR-2, elongation: 150%, manufactured by Inoac Corporation), an adult mask of a comparative example was prepared in the same manner as in Example 1. Formed.

When the masks of Example 1 , Reference Example 2, Reference Example 3, Example 4 and Comparative Example were worn on the face and the feeling of use was judged, the masks of Example 1 , Reference Example 2, Reference Example 3, and Example 4 were used. Had good breathability, did not feel breathlessness, had a good feeling of use, and did not feel any slippage during use. On the other hand, the mask of the comparative example had low breathability and felt breathlessness.

  Moreover, the pollen particle collection (filtration) efficiency was measured using the sheet (2 mm thickness) of the polyurethane polyurethane film removed in Example 1 as a test specimen. As a result of the measurement, the average of 3 times was 99.4%. In the test method, the test powder (pollen substitute particles) sized by the sizing device was allowed to flow at a constant speed from above the test body while the test system was sucked at a constant air flow rate. And the mass of the particle | grains trapped by the test body and the particle mass which passed the test body were measured, and the collection (filtration) efficiency of pollen particle | grains was computed based on the following formula [Equation 1]. The test conditions are as shown below.

・ Test conditions Test powder (pollen substitute particle): Ishimatsuko (APPIE standard powder)
Test flow rate: 28.3 L / min
Test powder amount: 75 ± 5mg
Test powder speed: 20 ± 5 mg / min
Temperature and humidity of test room: 20 ± 5 ° C, 50 ± 10% RH

DESCRIPTION OF SYMBOLS 10 Mask 11 Mask half body 13 Ear hook part 13a Opening part 15 Curved shape part

Claims (1)

In a mask that covers a part of the face including the mouth and nostril and has ear hooks on both left and right sides,
Elastic, 500% 200% or more elongation less, the opening of the ear shell cell count to 80 / 25mm or more 110 or / 25mm at one end of the following film removal sheet-shaped polyester polyurethane foam The two mask halves, which are formed and formed with a curved shape portion bulging outward at the other end, are thermally welded at the curved shape portion, so that the curved shape portion joined by the thermal welding becomes the two masks. A mask characterized by being formed of polyurethane foam which is a portion that bulges outward from the mask when the half body is spread out, and is removed from the bulged portion to the ear hooks on the left and right ends.

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