JP2806341B2 - Dust proof hat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust-proof hat having a relatively simple structure, but having extremely excellent dust-proofing properties and an excellent effect of preventing hair and dust from falling off.

[0002]

2. Description of the Related Art Conventionally, in the food industry, the electronics industry, the pharmaceutical industry, and the medical field, which dislike dust and the like, a simple hat called a hair cap made of a non-woven material having high air permeability is used as a hat worn during work. Was used.

[0003] However, such a hat has a drawback that hair, dandruff, dust, bacteria and the like are discharged to the outside through the highly permeable nonwoven material, and contaminate the surrounding environment and objects.

There is also a hat using a non-breathable woven material in order to completely prevent the passage of dust and the like, but a hat made of such a substantially non-breathable material is worn for a long time. Then, there was a drawback that the head became stuffy and the wearer felt discomfort.

As described above, it is a general feature of hats in this field that good air permeability and good dust resistance contradict each other.

[0006]

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a wearer with practically no stuffiness even when worn for a long time and to have extremely good dustproofness. It is intended to provide an excellent dust-proof hat.

[0007]

The hat according to the present invention for achieving the above object has the following constitution.

[0008]

That is, the surface charge density is 1 × 10 −10 coulomb / cm 2 or more, the air permeability is 300 to 1000 cc / cm 2 · second, and the average fineness of the constituent fibers is 10 tener or less. And a flatness of the cross-sectional shape, wherein the electret material made of a spunbonded nonwoven fabric composed of fibers of 1.2 or more is used for forming the main region of the hat. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a dustproof cap according to the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a schematic perspective view showing an embodiment of a dustproof cap of the present invention generally called a hair cap or the like. The dustproof cap 1 of the present invention has at least an average of constituent fibers. The electret material 2 made of a spunbonded nonwoven fabric having a fineness of 10 denier or less is used for forming the main region of the hat. To be used to form the main region of the hat means to be used to form the hat at a place where the head is actually covered, whether entirely or partially.

That is, the important point is that the hat of the present invention is
As described above, this is because the problem is to prevent stuffiness on the head actually worn, and to prevent hair, dust, dandruff, etc. from falling off. The use thereof has the significance of the technical idea of the present invention. Therefore, the air permeability, flexibility and the like that are naturally required are different from those provided only at the opening edge of the hat.

However, as will be described later, the hat of the present invention is made of a very light fluffy non-woven electret material as a specific embodiment, and the hat does not easily come off. Thus, it is preferable to adopt a configuration in which a tightening string or the like is appropriately provided. For example, the hat shown in FIG. 1 is particularly provided with a fastener 3 made of a stretchable material or a tightening string at the hat opening, and it is preferable to adopt such a structure. Such a stretchable material or a fastener is for preventing the very lightweight hat according to the present invention from easily coming off, and suitably employs a string shape, a belt shape, a hook, a material using a fastener, or the like. Can be used. Any stretchable material can be used as long as it is substantially stretchable, for example, a material such as an elastic string, or a bag whose end is shaped like a bag and pulled through the string and tightened. Etc. can be used.

The electret material 2 may be used alone, but as shown in various embodiments in FIGS. 2 to 4, a composite / laminated material may be used. . That is, FIGS. 2 to 4 are schematic cross-sectional views illustrating examples of usage of the electret material 2a that can be used for the hat of the present invention. FIG. 2 shows an example in which the electret material 2a is used alone, and FIG. Reference numeral 4 denotes an example in which the electret material 2a and the other material 2b are combined and laminated for use. Of course, it may be used in an embodiment other than the embodiment shown in these figures.

Further, the shape of the dustproof cap of the present invention can be appropriately selected from various ones according to the work contents actually used and the like. And those having various shapes, such as those having a hat opening near the ears.

The form of the electret material is not particularly limited as long as it is a spunbonded nonwoven fabric whose constituent fibers have an average fineness of 10 denier or less, but the air permeability is 300 to 1000 cc / cm ² · second. It is important to use one within the range. That is, 300c
If it is less than c / cm ² · second, it is poor in air permeability and has a feeling of stuffiness, inferior usability as a hat, and 1000 cc / c
If the time exceeds m ² · sec, the filter effect becomes poor, so that hair, dust, dust and the like often leak to the outside of the hat from the head, which is not preferable. Even when the electret material is used as a composite by laminating, for example, a composite with another material, it is preferable that the composite has a ventilation performance in the above-described range.

The electret spunbonded nonwoven fabric has high strength and strength, so that it has an air permeability of 300 to 100.
Even a highly permeable material having a range of 0 cc / cm ² · second or the like can be effectively used with good durability.

According to the findings of the present inventors, the electret material has a surface charge density of 1 × 10 ⁻¹⁰ coulomb / cm ² or more in consideration of the activity of the wearer during work. The use is particularly important in that the scattering of contaminants such as hair, dust, dust and the like from the head or the hat can be effectively prevented by electric adsorption. The electret material has a volume resistivity of 10 ¹⁴ Ω ·
It is preferable to use an organic synthetic material having a diameter of not less than cm.

Further, the non-woven fabric is preferably one in which the average fineness of the constituent fibers is substantially 10 denier or less, more preferably 3 denier or less. The effect of collecting dust and dirt (filter effect) In addition, the thinner the fiber, the higher the electret performance, which is preferable.

The electret material made of a spunbonded nonwoven fabric made of a fiber having a cross-sectional shape of a fiber having a flatness of 1.2 or more is effective because it has a large effect of adsorbing and holding hair. is there. It is considered that this is based on the two effects of increasing the adsorption holding power by increasing the contact area with the hair and further increasing the adsorption power itself because a high surface charge density is obtained. Here, the flatness of the cross-sectional shape of the fiber is
It 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.
The number is taken as 50 and the average value is taken. Such a spunbonded nonwoven fabric composed of fibers having a flatness of 1.2 or more can be obtained by calendering a spunbonded nonwoven fabric obtained by an ordinary method or by embossing which is a partial calendering treatment.

In the present invention, as described above, the electret material is composed of a spunbonded nonwoven fabric. Generally, the basis weight of the nonwoven fabric is preferably within a range of 100 g / m ² or less, and more preferably 10 g / m ^2. ~50g / m ²
It is better to be within the range. With such a range, it is possible to obtain a dustproof hat that is very light, flexible, and does not cause any special discomfort during use.

When the electret material is used in combination with another material, it is preferable to use a strong non-woven fabric as the other material, and it has a smooth surface smoothness, a fluffing property and a self-dusting property. It is better to use the one without. Therefore, as the other material, a filament nonwoven fabric, particularly a spunbonded nonwoven fabric, can be most preferably used, but a single-fiber nonwoven fabric can also be preferably used. The other material may have a high degree of electret performance even as a composite, and may be constituted by a material that has been slightly electretized.However, it is not always necessary to use an electretized material, but rather, It may be used for the purpose of supplementing the properties of the electret material as the main material.For example, a material having a stronger strength as described above, a material made of an antistatic material, or a material that can make the appearance more beautiful, etc. It is preferably used as In addition, a material whose surface is printed, dyed, or otherwise processed can be used. Further, as another material, as the filament nonwoven fabric or the short fiber nonwoven fabric, a melt blown nonwoven fabric can be used,
In that case, it is possible to provide a dustproof hat that is more excellent in the effect of adsorbing hair and the like.

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

That is, the sample (electret material) 4 to be measured is set between the earth electrode 5 and the other metal electrode 6 (4 cm in diameter) to induce and accumulate electric charge in the capacitor 7 and to set its potential. Is measured by the voltmeter 8 and is obtained by the following equation.

In FIG. 1, reference numeral 9 denotes a ground.

Surface charge density (Coulomb / cm ² ) = C ×
V / S, C: Condenser capacity (Farad) 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 tester based on the -1096 method.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete construction and effects of the dustproof cap of the present invention will be described below with reference to embodiments.

[0027]

[0028]

[0029]

Example 1 Average fineness 2 d, basis weight 20 g / m 2, air permeability 400 cc /
A calendering process is applied to a polypropylene spunbond nonwoven fabric having a surface charge density of 1.5.times.10@-10 coulomb / cm @ 2 and a flow rate of 150 cc / cm @ 2 .sec. Was obtained.

The nonwoven fabric was electretized to obtain an electret nonwoven fabric sheet having a surface charge density of 1.5 × 10 ⁻⁹ coulomb / cm ² .

Using this electret non-woven fabric sheet, a dust-proof hat called a hair cap having a shape as shown in FIG. 1 was made and worn in a clean room. The generation of dust from the part was remarkably improved as compared with the conventional similar product, and was optimal as a dustproof cap in a clean room.

Further, this hat had high durability and was very good in that respect.

[0034]

As described above, the dust-proof hat of the present invention has a relatively simple structure, but has a comfortable breathability and a light weight when actually worn, and furthermore, the hair falling off inside the hat and the like. Excellent dust-proofing, because of the synergistic effect of the electric suction power of the electret material and the mechanical filter effect, the dust and dirt can be absorbed / collected very effectively and not leak outside the hat. It can be effective.

Therefore, it does not feel stuffy when worn and hardly pollutes the external environment, and is extremely excellent as a dustproof hat. For this reason, it is ideal for use in clean rooms, operating rooms, medicine manufacturing rooms, cooking rooms, working rooms for food manufacturing and sanitation related businesses, and other environments where contamination from head contamination should be prevented. It is.

The electret material used in the dustproof cap of the present invention has a high dust absorbing / collecting effect in spite of its high air permeability and low basis weight. The basis weight is generally about 50 g / m ² or less,
Many can be used as extremely light ones of about several tens g / m ² . Therefore, the entire hat is very light, so that the feeling of discomfort when wearing it is small, and the cost is low and the hat is easy to use.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing the appearance of an embodiment of a dustproof cap according to the present invention.

FIG. 2 is a schematic cross-sectional view illustrating various examples of usage of an electret material that can be used for the dustproof cap of the present invention.

FIG. 3 is a schematic cross-sectional view illustrating various examples of usage of an electret material that can be used for a dustproof hat according to the present invention.

FIG. 4 is a schematic cross-sectional view illustrating various examples of use of an electret material that can be used for the dustproof cap of the present invention.

FIG. 5 is a schematic diagram of a measuring device for explaining a method of measuring a surface charge density.

[Explanation of symbols]

 1: Dust-proof cap 2, 2a: Electret material 2b: Other material 3: Fastener made of stretchable material or fastening string 4: Sample 5: Earth electrode 6: Other metal electrode 7: Condenser 8: Voltmeter 9: Earth

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A42B 1/18 A42B 1/04 D04H 3/16

Claims (3)

(57) [Claims] 1. A surface charge density of 1 × 10 −10 coulomb /
cm2 or more, and the ventilation rate is 300 to 1000 cc /
cm2.sec., the average fineness of the constituent fibers is 10 tener or less, and the flatness of the cross-sectional shape is 1.2 or more. A dust-proof hat characterized by being used for: 2. The dustproof cap according to claim 1, wherein said electret material is used by being laminated with another material. 3. The dustproof hat according to claim 1, wherein a substantially elastic material or a fastener is attached to the hat opening of the hat.