JPH0334195Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a sanitary mask that is intended to be manufactured and used easily.

[Conventional technology]

Conventionally, the main body of sanitary masks widely used in daily life is mainly made of folded gauze, and masks using such gauze are bulky, and moreover, the body of the sanitary mask that has been widely used in daily life is bulky. Because moisture does not evaporate easily, the area that touches the nostrils and mouth becomes wet.
When wearing glasses in cold weather, it is common for the glasses lenses to fog up due to your own breath. In recent years, single-layer plastic non-woven masks have been developed, but they are very bulky and do not overcome the drawbacks of the conventional gauze method.

[Problem that the invention attempts to solve]

Therefore, this invention can reduce the weight and volume of conventional sanitary masks, prevent fogging of glasses, and
The technical challenge is to simplify production and use.

[Means for solving problems]

In order to solve the above problems, this idea has two
The mask body is made by layering sheets of breathable polyolefin nonwoven fabric and sandwiching a nonwoven core between them.The mask has holes on both sides for hanging over the auricles, and has a tensile modulus of elasticity of 1000~
The present invention provides a sanitary mask characterized by heat-welded ear hooks made of a stretchable thermoplastic resin film of 3000 kgf/cm ² , the details of which will be described below with reference to the drawings.

First, the sanitary mask of this invention consists of a mask body A and an ear hook part B. The mask body A is composed of three layers, and two sheets of breathable polyolefin nonwoven fabrics 1 and 3 are stacked on both sides of a core 2. Here, the two breathable polyolefin nonwoven fabrics 1 and 3 each have a weight of 15 to 25 g per 1 m ² and the size of one ventilation hole is about 0.07 mm ²
The following is desirable. The reason why the weight of the breathable polyolefin nonwoven fabrics 1 and 3 and the size of the ventilation holes are limited is that the mask body A is as light as possible, has a smooth surface and feels good to the touch, and has a small and moderate ventilation resistance when breathing. mechanical strength (e.g. tensile strength) and at the same time the core 2
This is to prevent short fibers from scattering, moving, and falling off. The core 2 is made of a nonwoven fabric made of natural cellulose fibers, has a weight of 50 to 100 g ^per square meter, and has a vent hole of about 0.05 ^mm2 or less. The reason for limiting the weight of the core 2 and the size of the ventilation hole in this way is to promote the weight reduction of the mask body A, to avoid increasing ventilation resistance during breathing, and to take into account the ability to filter dust, etc. It is from. Since the mask body A is a part that comes into direct or indirect contact with the mouth, it is preferably made of a material that does not contain harmful plasticizers or other additives.

Next, the ear hook part B of this invention is made of a stretchable thermoplastic resin film 5 with a hole 4 for hanging it on the auricle (also called the auricle, the part visible from the outside of the ear).
Preferably, the tensile modulus is 1000 to 3000 kgf/cm ² . This is because, if a film with such a tensile modulus is used, the length of the distance between the left and right auricles due to individual differences can be easily adjusted using the stretchability of the film. That is, the mask can be used by pulling the ear hooks attached to both ends of the mask body A from side to side with both hands and stretching them to fit the size of the face. If the above tensile modulus is less than 1000 kgf/cm ² , when it is attached to the auricle, the restorability is low and it tends to come off easily.
If the ratio exceeds 3000 kgf/cm ² , the resistance when stretched by hand will be large, and the auricle will be stretched due to excessive resilience when worn, resulting in poor wearing comfort.

Furthermore, since it is desirable that the connection between the mask body A and the ear hook part B be easy to process without causing slippage or peeling, the mask body It is preferable to connect the polyolefin nonwoven fabrics 1 and 3 and the thermoplastic resin film 5 indirectly or directly. Needless to say, the places where they are connected are on both the left and right sides of the mask body A, and since it is difficult to heat-weld the polyolefin nonwoven fabrics 1 and 3 and the natural cellulose fiber nonwoven fabric 2 without using an adhesive, the third Either the natural cellulose fiber nonwoven fabric 2 is sandwiched in the direction of the arrow in the stacked manner shown in Figure A or B (in this case, the natural cellulose fiber nonwoven fabric 2 is sandwiched without being heat-welded), or the natural cellulose fiber nonwoven fabric 2 is One or more through holes 6 are provided at each of the left and right ends of the fibrous nonwoven fabric 2,
When heated and compressed in the direction of the arrow, the polyolefin nonwoven fabrics 1 and 3 or the polyolefin nonwoven fabric 1 and the thermoplastic resin film 5 are directly welded at the through holes 6, and the natural cellulose fiber nonwoven fabric 2 is fixed without using a hot melt adhesive. can do. In addition, breathable polyolefin nonwoven fabric 1
and 3. The natural cellulose fiber nonwoven fabric 2 and the thermoplastic resin film 5, each having a certain width, are stacked together in a state as shown in any of FIG. If the length of the long object is cut at intervals corresponding to the vertical width of the mask body A (including punching out the entire ear hook part B and the holes 4 at the same time), mass production is extremely easy.

The sanitary mask according to this invention, which is constructed as described above, uses a nonwoven fabric for the core, so the filtration ability required in daily life can be secured with low ventilation resistance. Since the polyolefin nonwoven fabric has good breathability, the resistance to airflow caused by breathing when worn is extremely low. The ear hooks are made of stretchable thermoplastic resin film, so they can be plastically deformed by pulling them left and right with both hands, and can be used to suit the size of the face.They can also be attached to the mask body by heat welding for mass production. can.

〔Example〕

Two sheets of polypropylene nonwoven fabric (manufactured by Sanwa Paper Co., Ltd.: Sunmore) with a width of 12 cm, a length of 1 m, a weight of 20 g per ^m2 , and a vent hole size of 0.050 ^mm2 (average).
For breathable polyolefin non-woven fabrics 1 and 3, width 11cm, length 1m, weight 85g per ^1m2
A piece of cotton nonwoven fabric (manufactured by Honshu Paper Co., Ltd.: Palcross) with a ventilation hole size of 0.025 mm ² (average) was used for the core 2, and was further made with a width of 11 cm, a length of 1 m, and a tensile modulus of 1700 kgf/ ^cm2 , two low-density polyethylene films (manufactured by Hayashi Ichiji Co., Ltd.: Hi-shibo Film #640EE type) were selected for the thermoplastic resin film 5 of the ear hook part B, and they were placed in the order shown in Figure 3 A. The two polyethylene nonwoven fabrics sandwiching the cotton nonwoven fabric and the low-density polyethylene film located on both sides are welded together by overlapping them (with an overlap margin of 10 mm) and heating and compressing the arrowed areas using a heat welding machine (manufactured in-house). After that, it was cut at intervals of 9 cm in the length direction. At this time, the hole 4 for the ear hook was made into a D-shape leaving a 10 mm wide film part around the periphery as shown in Figure 1, and this was punched out at the same time as the cutting. In this way, 11 sanitary masks of this invention were obtained. One sanitary mask obtained had a pressure loss of 2.5% when venting at 10 liters per minute, whereas a conventional commercially available mask made of eight layers of gauze with each vent hole having a size of approximately 0.5 ^mm2 The pressure loss is
It was 65%. The sanitary mask of this invention has extremely low ventilation resistance when breathing, and unlike conventional products, it does not flow from both sides of the nose toward the glasses when worn, hardly fogging the glasses, and even though the pressure drop is extremely low, It has become clear that the filter has sufficient filtration ability for daily life.

〔effect〕

As mentioned above, the sanitary mask of this invention has a mask body composed of a breathable polyolefin nonwoven fabric and a nonwoven fabric core to reduce the airflow resistance when breathing when wearing a mask, making it easier to breathe and wearing glasses in cold weather. It does not cloud the image. In addition, the ear hooks are made of stretched thermoplastic resin film with a predetermined tensile modulus, so you can pull them left and right with both hands without having to adjust the length by retying the string like in the past. It can be plastically deformed and used according to the size of the face, and can be easily mass-produced by attaching it to the mask body by heat welding, and there are no particular safety issues when wearing it or disposing of it. Therefore, it can be said that the sanitary mask of this invention is particularly suitable for single-use use, and its significance is extremely great.

[Brief explanation of the drawing]

Fig. 1 is a plan view illustrating the sanitary mask of this invention, Fig. 2 is a cross-sectional view thereof, and Figs. FIG. A... Mask body, B... Ear hook part, 1... Polyolefin nonwoven fabric, 2... Core, 3... Polyolefin nonwoven fabric, 4... Hole, 5... Thermoplastic resin film, 6... Through hole.

Claims (1)

[Scope of claim for utility model registration] (1) A mask with a tensile modulus of elasticity of 1000 to 3000 kgf, which has holes for hanging over the auricles on both left and right sides of the mask body, which consists of two layers of breathable polyolefin nonwoven fabric sandwiching a nonwoven fabric core between them. A sanitary mask characterized by heat-welded ear hooks made of a stretchable thermoplastic resin film of /cm ² . (2) Breathable polyolefin non-woven fabric is 15 per ^m2
The sanitary mask according to claim 1, which has a weight of ~25 g and a size of each vent hole of about 0.07 mm ² or less. (3) Scope of claim for utility model registration, which is a nonwoven fabric made of natural cellulose fibers, in which the nonwoven fabric core has a weight of 50 to 100 g per 1 m ² and the size of each ventilation hole is approximately 0.05 mm ² or less The sanitary mask described in paragraph 1.