JPH0611925B2 - Dustproof hat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention has a feature that it has a relatively simple structure, yet has an extremely excellent dust-proof property and an excellent effect of preventing hair and dust from falling off. Regarding a dustproof hat.

[Prior Art] Conventionally, in the food industry, the electronics industry, the pharmaceutical industry, the medical field, etc. where dust and the like are disliked, a simple cap called a hair cap, which is made of a non-woven fabric having large air permeability, is used as a hat to be worn during work. It was being done.

However, such a hat has a drawback in that hair, dandruff, dust, bacteria, etc. are discharged to the outside through this highly breathable non-woven fabric material and contaminate the surrounding environment and objects.

In addition, some hats are made of non-breathable woven materials, etc., in order to prevent dust from passing through completely.
When a hat made of such a material having substantially no air permeability is worn for a long time, the head becomes stuffy and the wearer feels discomfort.

As described above, the general characteristic of the hat in this field is that good breathability and good dust resistance are in conflict with each other.

[Problems to be Solved by the Invention] In view of the above points, it is an object of the present invention that the wearer does not actually feel stuffy even when worn for a long time, and the dust resistance is extremely good. It is intended to provide an excellent dustproof hat.

[Means for Solving the Problems] The hat of the present invention that achieves the above-mentioned object has the following configuration.

That is, a dustproof featured by using an electret material having a surface charge density of 1 × 10 ^-10 coulomb / cm ² or more and an air flow rate of 10 to 1000 cc / cm ² · sec for forming the main region of the hat. It is a hat for.

[Operation] Hereinafter, the dustproof cap of the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a schematic perspective view showing an example of an embodiment of a dustproof cap of the present invention generally called a hair cap, and the dustproof cap 1 of the present invention includes at least the electret material 2 in the cap. It is used to form the subject area of. To be used to form the main body area of the hat means to be used to form the hat at a portion that actually covers the head of the hat in whole or in part.

This is because the hat of the present invention has problems with the feeling of stuffiness on the head actually worn as described above, and also with the hat for dropping hair, dust, dandruff, etc., which actually covers the head. That is, the technical idea of the present invention is significant.

As will be described later, the hat of the present invention, as a specific embodiment, is made of a very light and fluffy and non-woven electret material, and a tightening cord or the like so that the hat does not come off easily. Is preferably provided. For example, the hat shown in FIG.
In particular, a fastening tool 3 made of a stretchable material or a fastening string is attached to the opening of the cap, and such a structure is preferable. Such a stretchable material or a fastener is used to prevent the cap from coming off easily, and a material such as a string, a belt, a hook, or a fastener can be appropriately used. Any stretchable material can be used as long as it is substantially stretchable. For example, a material such as a rubber cord, or a bag whose end is formed into a bag and is pulled and tightened through the cord. Etc. can be used.

Further, the electret material 2 may be used alone, but as shown in various modes in FIG. 2, it may be used especially when it is combined / laminated with another material. That is, FIGS. 2A to 2C are schematic cross-sectional views illustrating an example of a use mode of the electret material 2a that can be used for the hat of the present invention, and FIG. 2A shows an example of the case of being used alone, 2B and 2C show an example of a case where the electret material 2a and the other material 2b are used in a composite / laminated manner. Of course, it may be used in a mode other than the modes shown in these figures.

In addition, the shape of the dustproof cap of the present invention can be appropriately selected from various shapes according to the work contents to be actually used, for example, those with or without a collar, and the ears. It is possible to use various shapes such as a hat opening located nearby.

Although the form of the electret material is not particularly limited, it is preferable that the electret material is made of a fiber material, and it is particularly important to use a material having an air permeability of 10 to 1000 cc / cm ² · sec. . That is, 10cc / cm ²
If it is less than a second, it has poor breathability and has a feeling of stuffiness, and it is inferior in usability as a hat, and if it exceeds 1000cc / cm ² · sec, the filter effect becomes poor, so hair, dust, dust, etc. are less than the head. It is not preferable because it often leaks to the outside. Even when the electret material and another material are used as a compounded material by compounding / laminating, it is preferable that the compounded material has a ventilation performance within the above range. In particular, when using a light and fluffy low-weight electret meltblown nonwoven fabric, it is preferable to use a nonwoven fabric having an air permeability of 10 to 400 cc / cm ² · sec from the viewpoint of strength and strength. When an electret spunbonded non-woven fabric is used, the non-woven fabric also has high strength and strength, so that even a highly air-permeable fabric having an air permeability of 300 to 1000 cc / cm ² · sec can be effectively used. It is a thing.

Further, according to the knowledge of the present inventors, in consideration of the activity status of the wearer at work, the electret material having a surface charge density of 1 × 10 ⁻¹⁰ coulomb / cm ² or more should be used. However, it is important in that a hat can be effectively formed by electric adsorption of scattering of contaminants such as hair, dust, and dust from the head or the hat. As the electret material, it is preferable to use an organic synthetic material having a volume resistivity of 10 ¹⁴ Ω · cm or more. For example, a nonwoven fabric made of polypropylene fiber is preferably used. Alternatively, the melt blow method or the burst fiber method is preferable. Furthermore, the nonwoven fabric is
It is desirable that the average weaving degree of the constituent fibers is substantially 10 denier or less, more preferably 3 denier or less, since the effect of collecting dust, dust and the like can be enhanced. In particular, a melt-blown nonwoven fabric made of polypropylene fibers generally has an average fineness of constituent fibers of 0.5.
It is easy to set the denier to 0 denier or less, has strength, and can be preferably used.

Further, a material in which the electret material is composed of a spen-bonded nonwoven fabric in which the cross-sectional shape of the constituent fibers is composed of fibers having a flatness of 1.2 or more is effective because it has a large effect of adsorbing and holding hairs. This is because the adsorption holding power is increased by increasing the contact area with hairs,
It is considered to be based on the two effects of increasing the adsorption force itself because a high surface charge density can be obtained. Here, the flatness of the cross-sectional shape of the fiber is a value obtained by measuring the length of the short side and the long side of the fiber cross section and dividing the length of the long side by the length of the short side, In the present invention, the number of n = 50 is set and the average value is taken.

In the present invention, the electret material as described above,
When configuring a nonwoven fabric, generally, the basis weight of the nonwoven fabric is preferably in the range from 100 g / m ² or less, and more preferably from in the range of ^{10g / m 2 ~50g / m 2} . By setting it in such a range, it is possible to make a dustproof hat which is very light and flexible, and which is very easy to use and does not feel a particular relaxation feeling at the time of use.

When the electret material and other materials are used in combination, it is preferable to use a strong non-woven fabric as the other material, and also having smooth surface smoothness, fluffiness and self-dusting property. It is better to use one that does not exist. Therefore, as the other material, filament non-woven fabric, particularly spun-pond non-woven fabric can be most preferably used, but short fiber non-woven fabric can also be preferably used. The other material, in order to have a high level of electret performance as a compound, may be made up of some electret, but it is not always necessary to use an electretized one, rather, It may also be used for the purpose of supplementing the properties of the main material, the electret material. For example, as described above, a material having stronger strength, a material made of an antistatic material, a material having a more beautiful appearance, or the like is preferably used as another material. Also. It is also possible to use those whose surface is printed, dyed or otherwise dipped.

The method of measuring the surface charge density described above will be described below with reference to FIG.

That is, the sample to be measured (electret material)
4 is set between the earth electrode 5 and the other metal electrode 6 (diameter 4 cm) to induce and accumulate charges in the capacitor 7, and the potential is measured by the voltmeter 8 and calculated by the following formula. Is. In the figure, 9 is a ground.

Surface charge density (Coulomb / cm ² ) = C × V / S, C: Capacitor capacity (Warad) V: Potential (Volt) S: Electrode area (cm ² ) In addition, the air flow rate of the electret material is JIS L
It is measured by a method using a Frazier type tester based on the -1096 method.

[Examples] Specific configurations and effects of the dustproof cap of the present invention will be described below with reference to Examples.

Example 1 A melt-blown non-woven fabric of polypropylene fibers having an average fineness of 0.03 and a denier (d) was used and was electretized in a high electric field.

The electret material thus obtained has a surface charge density of 5 × 10 ^-10 coulomb / cm ² and a basis weight of 20 g / m ²
The air flow rate was 80 cc / cm ² · sec.

Using such an electret material, a dustproof cap called a haircap having a schematic structure shown in FIG. 1 was manufactured. A flat rubber cord was attached to the opening of the hat as a stretchable material so as to improve the fit to the head so that the head could not be easily removed, and the leakage of dust could be prevented.

The thus-obtained dustproof hat according to the present invention was tried to be worn in a clean room, but no feeling of stuffiness was felt, and dust from the head was remarkably improved as compared with a conventional similar product. Therefore, it was recognized that the problem of environmental pollution was practically excellent.

Example 2 As the electret material, two kinds of non-woven fabrics, a polypropylene meltblown nonwoven fabric having an average fineness of 0.05d and a basis weight of 20 g / m ^{2 and} a polypropylene spundon nonwoven fabric having an average fineness of 2d and a basis weight of 15 g / m ² , were used, A composite cloth obtained by composite-bonding the both by a hot embossing adhesion method was used to obtain an electret in a high electric field to obtain an electret material having a surface charge density of 3 × 10 ⁻¹⁰ coulomb / cm ² .

The electret material thus obtained was used so that the melt-blown non-woven fabric side was on the inside of the hat, to produce a dust-proof hat having a schematic structure shown in FIG. The air flow rate of the electret material was 75 cc / cm ² · sec.

Similar to the first embodiment, a rubber cord is attached to the opening of the hat as an elastic material so as to enhance the fit to the head so that the head does not easily come off and the leakage of dust can be prevented. .

The thus-obtained dustproof hat according to the present invention was tried to be worn in a clean room, but no feeling of stuffiness was felt, and dust from the head was remarkably improved as compared with a conventional similar product. It was an excellent product with virtually no problem of environmental pollution.

Further, this hat was extremely excellent in high durability capable of withstanding long-term use.

Example 3 A melt-blown nonwoven fabric of polypropylene fibers having an average fiber of 0.03 d and a basis weight of 50 g / m ² was treated in a high electric field to be electret and had a surface charge density of 5.5 × 1.
0 ^-10 to produce an electret material of Coulomb / cm ^2.

This electret material has an average fineness of 2d and a basis weight of 2
A composite fabric was obtained by heat-bonding 0 g / m ² of a polyester spunbonded nonwoven fabric subjected to antistatic treatment. The polyester spunbonded non-woven fabric is substantially not electretized. The air permeability of the composite cloth is
It was 40 cc / m ² · sec.

The composite cloth thus obtained was used so that the melt-blown non-woven fabric side was on the inside of the hat to prepare a hat for dust collection of the present invention. The cap opening has a bag-like end, and a string is passed through the inside of the cap to tighten the string so that the fit to the head is improved and the leakage of dust can be prevented.

As a result of wearing this hat, without feeling stuffy,
In addition, it was an excellent product without the problem of environmental pollution.

Example 4 Average fineness 2d, basis weight 20g / m ² , ventilation rate 400cc / cm
² seconds, surface charge density 1.5 × 10 ^-10 coulomb / cm ²
The polypropylene cap of the present invention was manufactured using the polypropylene spunbonded non-woven fabric.

When 50 employees in the food manufacturing industry tried on this hat, it was confirmed that hair loss could be almost completely prevented.

Moreover, when the evaluation of the wearing feeling of the hat was sought, it was agreed that almost all of them agreed that the hat had a large amount of ventilation and no feeling of stuffiness was felt.

Example 5 Average fineness 2d, basis weight 20g / m ² , ventilation rate 400cc / cm
² seconds, surface charge density 1.5 × 10 ^-10 coulomb / cm ²
The polypropylene spunbonded non-woven fabric of No. 1 was calendered to obtain a non-woven fabric of flattened fibers having a flatness of 1.6 and an air flow rate of 150 cc / cm ² · sec.

This non-woven fabric is electretized to have a surface charge density of 1.
An electret non-woven sheet of 5 × 10 ⁹ coulomb / cm ² was obtained.

Using this electret non-woven sheet, I made a dustproof hat called a hair cap having the shape shown in Fig. 1, and when I tried wearing it in a clean room, I did not feel stuffy, and from the head The dust generation was also significantly improved as compared with the conventional similar product, and it was the most suitable as a dustproof hat in a clean room.

Also, this hat was very durable and very good in that respect.

[Advantages of the Invention] As described above, the dustproof hat of the present invention has a relatively simple structure, yet has suitable ventilation when actually worn, and hair and other dust that have fallen off inside the hat. Due to the synergistic effect of the electric adsorption force of the electret material and the mechanical filter effect, objects and dust can be adsorbed / collected extremely effectively and exhibit an excellent dustproof effect that does not leak to the outside of the hat. It is possible.

Therefore, it does not feel stuffy when worn, and hardly pollutes the external environment, and is extremely excellent as a dustproof hat.

Therefore, it is ideal for use in clean rooms, operating rooms, drug manufacturing rooms, cooking rooms, work rooms for food manufacturing and hygiene-related industries, and other environments where contamination by head contaminants should be prevented. Is.

The electret material used for prevention of dustproof of the present invention has a high dust adsorbing / collecting effect for high air permeability and low basis weight, and the electret material generally has a basis weight. About 50g / m ² or less, mostly several tens
It can be used as an extremely light material of about g / m ² . Therefore, since the entire prevention is extremely light, there is little discomfort when worn, and it is easy and cost-effective, and it is economical in that it can be used like a disposable.

[Brief description of drawings]

FIG. 1 is a schematic external perspective view showing an embodiment of a dustproof cap of the present invention. 2A to 2C are schematic cross-sectional views illustrating various usage examples of the electret material that can be used in the dustproof cap of the present invention. FIG. 3 is a schematic diagram of a measuring device for explaining the method of measuring the surface charge density. 1: Dustproof cap 2, 2a: Electret material 2b: Other material 3: Tightening tool made of stretchable material or tightening string 4: Sample, 5: Earth electrode 6, Other metal electrode, 7: Capacitor 8: Voltmeter, 9: Earth

Claims (6)

[Claims] 1. A surface charge density of 1 × 10 ^-10 coulomb / cm ²
A dustproof hat, characterized in that the electret material having the above-mentioned ventilation rate of 10 to 1000 cc / cm ² · sec is used for forming the main region of the hat. 2. The dustproof cap according to claim 1, wherein the electret material is used by being laminated with another material. 3. The electret material comprises a melt-blown non-woven fabric having an average fineness of constituent fibers of 0.5 denier or less, according to claim (1) or (2). Dustproof hat. 4. The dustproof according to claim 1, wherein the electret material is a spunbonded nonwoven fabric whose constituent fibers have an average fineness of 10 denier or less. Hat. 5. The electret material comprises a spunbonded non-woven fabric in which the cross-sectional shape of the constituent fibers is composed of fibers having a flatness of 1.2 or more. The dustproof cap according to item (2) or (4). 6. The cap opening is provided with a substantially stretchable material or a fastener, and the cap opening is attached. Claims (1), (2), and (3). Section, Section (4) or Section
The dustproof cap described in (5).