JPH0261101A - Dust collecting beltlike body for winding around human body - Google Patents

Abstract

PURPOSE:To obtain the subject dust collecting beltlike body, consisting of an electret flexible beltlike material having a specific surface charge density, capable of readily and effectively preventing dust in the interior and exterior of clothes from entering and leaving without requiring a hermetically sealed state or tight winding and suitable for manufacturing operation of electronic products, foods, etc. CONSTITUTION:The objective dust collecting beltlike body, consisting of an electret flexible beltlike material (e.g., nonwoven fabric having <=0.5 denier average size) having >=5X10<-11>C/cm<2> surface charge density and preferably 10-100g/m<2> basis weight with self adhesion due to the surface charge density without dropping even without tight winding and imparting uncomfortableness.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a dust-collecting belt-like body for use when wrapping around the human body, and more specifically, it relates to a dust-collecting belt-like body for collecting dust that is used to collect dust that is used to collect dust that is intended to escape from the inside of clothing, or that is intended to enter the inside of clothing from the outside. The present invention relates to a dust-absorbing band for preventing dust from getting on the human body.

[Prior art]

BACKGROUND ART When a human body wears clothes, dust and dirt are generated due to friction within the clothes, and these dusts are emitted to the outside from the collar, cuffs, hem, etc. If such a phenomenon occurs frequently, for example, in an electronic product, pharmaceutical or food manufacturing industry, or in a medical field such as surgery, the quality of the product may be degraded or bacterial infection may occur. For this reason, at these work sites, collars, cuffs, hem openings, etc. are kept as sealed as possible, but this causes significant discomfort and pain to workers.

On the other hand, when getting a haircut at a barber shop, a towel or cover sheet is wrapped around the neck to prevent hair fragments from entering clothes through the neckline. In this case as well, excessive tightening will cause extreme discomfort to the haircut recipient.

[Problem to be solved by the invention]

The purpose of the present invention is to solve the above-mentioned conventional drawbacks and to provide a human body wrap that easily and efficiently prevents dust from entering and exiting clothes without the need for extreme sealing or strong wrapping. The objective is to provide a dust-absorbing strip for use.

[Means to solve the problem]

A dust-collecting band for wrapping around a human body according to the present invention which achieves the above object is characterized by being made of an electret flexible band having a surface charge density of 5 x 10-'' coulombs/C or more. .

The flexible strip of the present invention has the ability to self-adhere to the human body as well as the ability to adsorb dust due to its electrical charge. Therefore, around the neck.

By wrapping it around the wrist or ankle more than once, it very effectively attracts and captures dust that tries to enter and exit the clothing, preventing it from leaking to the outside or entering the inside.

In the present invention, the surface charge density that the electret flexible strip should have per side is 5 x 10-I+coulombs/cn! or more, more preferably I
It is desirable that the surface charge density is 5 X 10-" coulombs/c or more.
If it is less than d, it will not be possible to exhibit a sufficient dust adsorption effect.

Here, the surface charge density means that which is measured by a measuring mechanism as shown in FIG. 3 and determined by the following formula.

That is, in FIG. 3, 3 is a grounded earth electrode, which is close to this earth electrode 3.

A retractable movable electrode 4 is provided oppositely, and a capacitor 5 is connected to the movable electrode 4 and grounded.

Further, a voltmeter 6 is connected to the capacitor 5 to measure its potential.

In such a measurement mechanism, when the sample 30 of the flexible electret strip to be measured is sandwiched between the ground electrode 3 and the movable electrode 4, charges are induced and accumulated in the capacitor 5. The potential ■ at that time is measured by the voltmeter 6.

From this measurement result, the surface charge density is determined by the following formula.

Surface charge density (coulomb/cII = CX V/S where C: capacitor capacity (farad) ■: potential (volt) S: electrode area (cnT) The electret flexible strip of the present invention has a specific electrical resistance of It is made from a sheet-like material made of a large material.The electrical resistivity that the material should have is IQ + 3Ω・cm
The above are preferred, and synthetic polymers such as polyolefins, polyesters, fluorine-containing materials, vinyl chloride, polyamides, and polyacrylics are preferably used.

Among these, polyolefin synthetic polymers are most suitable.

Such a sheet-like material having a high electrical resistivity is made into an electret so as to have a surface charge density of at least 5 x 10-'' coulombs/d on one side, but the method for making the electret is not particularly limited, and any known method may be used. Typically, if the above-mentioned sheet-like material is interposed between the non-contact type application electrode and the semiconductor ground electrode, and high voltage is applied by both electrodes, one side will be positively charged and the other side will be charged with a positive charge. An electret sheet-like material whose surface is negatively charged is obtained.

Although the form of the sheet-like material is not particularly limited, nonwoven fabrics, knitted fabrics, or synthetic resin films are particularly preferred forms. Among these, nonwoven fabrics are suitable, and particularly nonwoven fabrics directly produced by melt blowing or spunbonding are most suitable. Nonwoven fabrics made using the melt-blown or spunbond process can have extremely small fineness of the constituent fibers, making them soft and comfortable to wear when wrapped around the neck, etc. It can provide a dust trapping effect. In order to further improve this effect, it is desirable that the average fineness of the constituent fibers of this nonwoven fabric be 0.5 denier or less.

By using a suitable cutter, such a sheet-like material is formed into a long dust-collecting belt-like material 1 having a predetermined width for wrapping around the human body as shown in FIG. In cross section, this strip 1 has a positive charge (
+) are distributed, and negative charges (-) are distributed on one side on the opposite side. Of course, these positive charges (+) and negative charges (-) are not limited to those that are completely polarized on both sides of the strip 1, for example, a small amount within a large amount of positive charges (+). The negative charge (-) may be mixed therein, or a large amount of negative charge (-) may be mixed with a small amount of positive charge (+).

The width of the electret band is not particularly limited, but it is 20 to 100 mm from above to make it easier to wrap around the neck etc.
It is preferable to set it as the range of.

Further, the length may be such that it can be wrapped at least once around the neck or the like.

Further, the above-mentioned electret strip has a basis weight of 10 to 10.
100 g/lT? It is preferable to keep it within the range of . When the band is wrapped around the neck, etc., it needs to adhere to the skin through self-adhesion, so the fabric weight is 100 g/n.
(If the weight exceeds 1, the self-weight becomes too large, and the self-adhesive property may be lost due to the balance with the adsorption property commensurate with the surface charge density. Also, if the basis weight is 1
If it is less than ~100 g/m2, it becomes difficult to maintain sufficient strength as a strip.

In the present invention, the above band-shaped body may be used alone,
Alternatively, a composite body made by laminating other strips may be used. It is desirable that the strips to be composited be electret, but not all of them are necessarily electret as long as at least one of the composites as a whole satisfies the above surface charge density. Rather, it is preferable to combine other strips in order to supplement the properties of the electroleft main strip.

The above-mentioned electric left band body of the present invention can be applied to the neck of a human body,
It is used by wrapping it around the wrist or ankle more than once.

By wrapping the electric left band in this way, even if dust is generated within the clothing due to friction and tries to escape through the header, cuffs, hem, etc., the band can reliably attract and capture it. . Furthermore, leakage of dust can be prevented without sealing the header, cuffs, hem, etc. Furthermore, since this electret strip has self-adhesive properties due to the above-mentioned surface charge density, it will not fall off even if it is not tightly wound, and will not cause discomfort.

Therefore, if workers in the electronics, pharmaceutical, or food industries who dislike dust use it alone or in combination with dust-proof clothing, they can prevent contamination of the working environment without causing discomfort. be able to.

On the other hand, if a haircut is performed at a barber's shop by wrapping the electric left band around the customer's neck, fine hair fragments will be absorbed and captured by the band and will not enter the clothing through the heading. . Moreover, the intrusion of hair pieces can be prevented without having to wrap the hair tightly.

〔Example〕

Polypropylene melt-blown nonwoven fabric with a surface charge density of 5.6 x 1Q-10 coulombs (basis weight 20g/r)
r? ), with a width that is convenient for wrapping around the neck.
Length = 5cm x 55cm (A) and 4cm x 45
cm (B) A plurality of strips were each cut into two types.

These two types of strips were used at barbershops in place of conventional tape for preventing hair fragments from entering. In other words, when performing a haircut at a barber shop, a paper tape is wrapped around the neck to prevent hair fragments from entering, a towel is wrapped around the neck, and a surrounding apron is finally wrapped around the neck. I used it instead and got a haircut.

The long band A was used for adults, and the short band B was used for children, and both can be wrapped around the neck at least one and a half times, and when wrapped, they feel extremely soft and adhere to the skin. After the haircut was completed, we observed the strips that had separated from the neck and found that each strip had attracted hairs ranging from a few millimeters to extremely short hairs of less than 1 mm. It was confirmed that the hair had not entered the body of the person receiving the haircut.

In particular, when the recipient of a haircut is a child, in the past, hair particles that got into the body during the haircut often forced the child to move, causing considerable hindrance to the haircut.
By using the above strip, such problems no longer occur.

〔Effect of the invention〕

As mentioned above, the dust suction belt for wrapping around the human body of the present invention has five parts.
Since it is composed of an electret flexible strip with a surface charge density of 0771 or higher, it has self-adhesive properties to the human body as well as adsorption properties for dust, etc. To efficiently and easily prevent dust from entering and exiting the inside and outside of clothing such as headers, cuffs, hem openings, etc. without wrapping.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of a dust-collecting belt for wrapping around a human body according to an embodiment of the present invention, and FIG.
A sectional view taken in the direction of arrows and FIG. 3 are explanatory diagrams showing a mechanism for measuring surface charge density. 1...Dust-collecting band for wrapping around the human body.

Claims (4)

[Claims] (1) A dust-collecting band for wrapping around the human body, which is made of an electret flexible band having a surface charge density of 5×10^-^1^1 coulomb/cm^2 or more. (2) The dust-collecting band for wrapping around a human body according to claim 1, wherein the flexible band is made of any one of a nonwoven fabric, a knitted fabric, or a synthetic resin film. (3) The basis weight of the flexible strip is 10 to 100 g/m^2
The dust-collecting band-shaped body for wrapping around a human body according to claim 2. (4) The dust-absorbing band for wrapping around a human body according to claim 1, wherein the flexible band is made of a nonwoven fabric, and the average fineness of the fibers constituting the nonwoven fabric is 0.5 denier or less.