JPH05261163A - Mask - Google Patents

Abstract

PURPOSE:To enhance the scavenging capacity for fine particles so as to prevent occurrence of dust by interposing a moisture-absorbable polymer between a pair of substrates each made of an unwoven fabric formed of long acetyl cellulose fibers as a component material having a single yarn fineness of 1.5 to 50 deniers, and having a METSUKE (20-200g/m<2>, a unit) of 30 to 200g/cm<2>. CONSTITUTION:Substrates 21 are formed from an unwoven fabric made of long acetyl cellulose fibers as a component material having a single yarn fineness of 1.5 to 500 deniers, and having a METSUKE of 30 to 200g/m<2>. A moisture-absorbable polymer 22 is interposed between the two substrates 21. Ear hooking strings 23 are attached to the opposite ends of the substrates 21. The mesh size of the unwoven fabric is about 70 to 100 meshes/cm<2>. With this arrangement, dust consisting of monofilaments, and fine dust is effectively trapped. Thus, constituted mask is preferably to be used for a worker in a clean room.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to masks, and more particularly to dust-free masks.

[0002]

2. Description of the Related Art Conventionally, a mask made of a base material generally called cotton gauze is widely known. In addition, in recent years, masks made of non-woven fabrics made of various materials have been known depending on the intended use.

[0003]

In the above cotton gauze mask, since the woven yarn of the gauze is a yarn obtained by spinning cotton short fibers, there is a problem that short fibers easily come off and dust is easily generated. there were. This dust is a very important problem when a mask is used in a work place such as semiconductor engineering and precision machining in recent years. This is because such work is performed in a dust-free chamber, and even a slight amount of dust is not allowed.

Further, although such a mask can catch relatively large particles, it has a problem that it is difficult to collect fine particles such as pollen, bacteria and viruses. The present invention has been made against the background of the problems of the prior art, and by using a specific non-woven fabric, dust and dust are not generated, and a mask capable of collecting fine particles by interposing a water-absorbing polymer. The purpose is to provide.

[0005]

The present invention has a single yarn fineness of 1
A mask using as a base material a nonwoven fabric having a basis weight of 30 to 200 g / m ² which is composed of acetyl cellulose long fibers having a denier of 5 to 5.0. The present invention is also a mask in which a water-absorbent polymer is interposed between the pair of base materials.

In the present invention, the material constituting the non-woven fabric is acetyl cellulose filament having a single yarn fineness of 1.5 to 5.0 denier, preferably 2.0 to 4.0 denier. When the single yarn fineness is less than 1.5 denier, the strength of the single yarn is low, and fluffing due to single yarn breakage increases. on the other hand,
If it exceeds 5.0 denier, it becomes inflexible, the mask becomes unsuitable when worn on the face, it is not suitable as a mask, and there is a problem that an adhesive is required when manufacturing a nonwoven fabric. .

Although the degree of acetylation of acetyl cellulose is not particularly limited, it is usually 10 to 62.5%,
It is preferably 53.0 to 57.0%. This is because when the degree of acetylation is low, the equilibrium moisture content is high, and you feel a sticky discomfort. is there.

The substrate used in the mask of the present invention is composed of a non-woven fabric of long fibers of acetyl cellulose obtained by a jet bond method, for example, by dry spinning such acetyl cellulose. If acetyl cellulose has short fibers, dust tends to be generated, so long fibers must be used. In the present invention, the basis weight of the nonwoven fabric is 30 to 200 g / m.
² , preferably 70 to 90 g / m ² . 30 g / m
^If it is less than ^2, there is a problem that it is too thin to be easily torn, while if it exceeds 200 g / m ² , it is too thick and stiff, and it does not fit to the face when the mask is worn.

An example of a method for manufacturing such a nonwoven fabric is shown in FIG.
Will be explained. That is, acetyl cellulose dope prepared by dissolving acetyl cellulose flakes in acetone is spun out from each of a plurality of dry spinning cylinders 1, and these are taken up by a gusset roller 3 via a focusing guide 2, and this is taken from a nozzle gun 4 by a screen conveyor 5 Spray evenly on.

Next, 0.1 to 0.15 kg from a sprinkler 6 having a thin nozzle of 0.08 to 0.15 mm.
Spray water columnar at a low pressure of / mm ² . This is because the fibers sprayed on the screen conveyor are disturbed by high-pressure water, resulting in uneven thickness. Full-scale entanglement is performed by injecting a high-pressure columnar flow of about 0.5 kg / mm ² from the water jet manifold 7. The jet injection hole (not shown) of the water jet manifold 7 has a diameter of 0.1 m.
m, arranged at a density of 25 to 30 holes / inch. After that, it is dehydrated by a dehydrating roll 8 and then dried by a drier 9, calendered by a calender 10, and wound by a winder 1.
Roll in 1.

The shape of the obtained non-woven fabric is determined by the material of the screen, the thickness of the net thread, and the structure, and these are not limited, but usually the number of meshes, that is, the mesh is 70-100 mesh / cm ^2. The wire mesh is made of stainless steel or bronze, flat, 2/1, 1/2,
2/2 italic, ridge organization is used.

The thus obtained non-woven fabric used in the present invention does not use an adhesive, and other fibers are twisted and bent around the fibers by the impact force of jet water to form a small bundle. It is made into a cloth with increased strength and contains no substances other than acetyl cellulose. And since it has a very high whiteness and is whiter than cotton, it has a refreshing feeling and is a preferable material as a mask.

Next, the mask of the present invention can increase the dustproof property by interposing a water-absorbing polymer. That is, a water-absorbent polymer is sandwiched between a pair of base materials made of the non-woven fabric. In this way, the water-absorbent polymer absorbs the water in the intake air and swells,
This increases the dustproof effect. The water-absorbent polymer may be any water-absorbent polymer that is generally used, but its form must be breathable because it is used for a mask. Therefore, interposing the powdery or beaded water-absorbent polymer in the form of being adhered to the base cloth with an adhesive is not preferable in terms of air permeability.

As a preferred embodiment, a fibrous water-absorbing polymer or a material in which a water-absorbing polymer is supported on fibers or threads is used, and this is molded into a breathable shape such as a nonwoven fabric, a woven or knitted material, or a web Examples thereof include non-woven fabrics, woven / knitted fabrics, webs, papermaking sheets, and sponge-like substrates having a water-absorbing polymer supported on a breathable substrate. As the fibrous water-absorbing polymer, an acrylic fiber such as an acrylonitrile polymer is used for the inner core, and a double structure fiber using an acrylate (co) polymer for the outer side,
Alternatively, a mixture of these with a super absorbent fiber such as rayon may be used.

For the water-absorbent polymer supported on a breathable substrate, a water-absorbent substance such as rayon, wood pulp, cotton, polyester, or cellulose is used as the substrate material, and acrylic acid and It can be obtained by polymerizing after impregnating or spraying an aqueous acrylate solution. If necessary, a crosslinking agent or an additive such as a polyfunctional ethylenically unsaturated monomer, polyglycidyl ether, polyol or polyamine may be added to the acrylic acid and / or acrylate aqueous solution.

In the mask of the present invention, an antibacterial zeolite can be attached to the nonwoven fabric made of the long fibers of acetyl cellulose for antibacterial or deodorizing. As a method of adhering, a method of adhering a suspension obtained by mixing antibacterial zeolite and a resin as an adhesive to a non-woven fabric by a spray method, a screen method, a roller method, or the like,
Alternatively, a method of adding it to the acetate dope at the time of spinning the fiber may be used. The nonwoven fabric used in the present invention can be easily attached with such an antibacterial zeolite.

[0017] The antibacterial zeolite is generally zeolite called, i.e. aluminosilicates _{xM 2 / n O · Al 2} O 3 · ySiO 2 · zH 2 O having a three-dimensional skeleton structure represented by the following general formula ( In the formula, M is an ion-exchangeable ion, n is a valence of the ion, x and y are respective metal oxides, silica coefficient, and z is the number of crystal water) All of them are replaced with antibacterial metal ions such as zinc, copper and silver. Such an antibacterial metal ion is 0.1 to 15% by weight in zeolite, depending on the kind of metal.
From the viewpoint of antibacterial property, it is preferable that the content is approximately.

[0018]

In the present invention, since the base material of the mask is made of long-fiber acetylcellulose non-woven fabric, unlike the case of short fibers, no fiber dust is emitted, so that dust can be eliminated. Further, by interposing the water-absorbing polymer, the polymer swells due to the moisture in the intake air, so that even small particles can be captured.

[0019]

The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Example 1 Acetylcellulose Flakes 50 having a degree of acetylation of 54.7%
0 kg was dissolved in 1,580 kg of acetone to prepare a dope, and a nonwoven fabric was manufactured according to the apparatus shown in FIG. That is, acetyl cellulose dope is spun out from each of the plurality of dry spinning cylinders 1, and the focusing guide 2 and the gozette roller 3 are used.
After that, it was sprayed uniformly on the screen conveyor 5 from the nozzle gun 4.

Thereafter, a water sprayer 6 having a nozzle having a diameter of 0.1 mm was used to spray columnar water at 0.1 kg / mm ² . Then 0.5k from the jet manifold 7
A high-pressure columnar water stream of g / mm ² was jetted and entangled. At this time, the jet injection holes used had a diameter of 0.1 mm and were arranged at a density of 25 holes / inch.

The single filament fineness of the acetyl cellulose filaments constituting the nonwoven fabric thus obtained was 3.0 denier, and the basis weight of the nonwoven fabric was 70 g / m ² .

Using the non-woven fabric thus obtained as a base material, a mask having a non-woven fabric-like water-absorbing polymer 22 sandwiched between a pair of base materials 21 as shown in FIG. 2 was manufactured. As the non-woven fabric-like water-absorbent polymer, Ranseal F manufactured by Nippon Exlan Co., Ltd. is mixed and woven with polyester fiber,
A non-woven fabric having a basis weight of 30 g / m ² was used.

This mask had a very white color and a clean feeling. Also, no dust was emitted. Furthermore, JIS Z89
The dust-proof rate evaluated by the dust collection efficiency measurement using the 0.3-μm average steering acid aerosol of 01 test dust 13 type B method was also as high as 89.0%.

[0024]

The mask of the present invention is very white in color, has a clean feeling, and does not generate dust of short fibers. Further, by interposing the water-absorbing fiber polymer, it is possible to collect fine particles which cannot be caught by a conventional cotton gauze mask or the like.

[Brief description of drawings]

FIG. 1 is a process drawing showing an example of a manufacturing process of a nonwoven fabric used in the present invention.

2 is a schematic perspective view of a mask manufactured in Example 1. FIG.

[Explanation of symbols] 1 dry spinning cylinder 2 focusing guide 3 goget roller 4 nozzle gun 5 screen conveyor 6 water sprinkler 7 water jet manifold 8 dewatering roll 9 dryer 10 calendar 11 winder 21 base material 22 water-absorbent polymer 23 sapphire string

Claims (2)

[Claims] 1. A basis weight of 30 to 30 made of acetyl cellulose long fibers having a single yarn fineness of 1.5 to 50 denier as a constituent material.
A mask based on a non-woven fabric of 200 g / m ² . 2. The mask according to claim 1, wherein a water-absorbent polymer is interposed between the pair of base materials.