JPS62229818A - Dust-proof auxiliary material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a dust-proofing auxiliary material with excellent dust-proofing properties.

[Prior Art] Dust-proof clothing is being developed as clothing used by workers in the electronics and bio-industries. In addition to dust-proof clothing, accessories such as hats, gloves, and shoes are also designed to suppress dust and bacteria from the human body.

For example, in the case of hats, the open end of the hat is made of stretchable material to suppress dust generated from the head. Regarding gloves, care must be taken to avoid contaminating the product with secretions, adhering dust, bacteria, etc. generated from the flat surface. There is also a need to protect hands from contaminants. For this reason, elastic materials are used for the base fabric and rubber bands are used for the openings. Furthermore, with respect to shoes, in order to suppress dust and bacteria generated from inside the shoes, improvements have been made such as using stretchable materials for the openings and using shoe covers made of fiber materials.

However, with these measures, it is difficult to completely suppress dust generation and leakage, and the dust prevention effect is not fully satisfactory.

[Problems to be Solved by the Invention] An object of the present invention is to eliminate the above-mentioned drawbacks and provide an auxiliary material for dustproofing that has an excellent dustproofing effect.

[Means for solving problems] The present invention has the following configuration.

A secondary material for dustproofing made by attaching an electret sheet to the opening.

EMBODIMENT OF THE INVENTION Hereinafter, the embodiment of the dustproof auxiliary material of this invention will be described in detail using drawings.

FIG. 1 is a perspective view showing an example of a dustproof hat according to the present invention. In the dustproof cap 1a, an electret sheet is used at the open end 2. FIG. 8 shows a cross-sectional view of the open end. In the open end portion 2, the electret sheet 3 is inserted between the back base fabric 4 and the back base fabric 5.

FIG. 2 is a perspective view showing another example of the dustproof hat according to the present invention. The dust-proof cap 1b shown in FIG. 2 is an example in which an electret sheet is used not only at the opening end but also at the ear opening end 6, and the ear opening end 6 is also made of lining base fabric and lining as in FIG. It is inserted between the base fabrics.

In the case of a cap, dust emitted from the open end is captured on the surface of another sheet by electric attraction to prevent environmental pollution.

FIG. 3 is a perspective view showing an example of the dustproof glove according to the present invention. The dust-proof glove 7a is used with the electret sheet 3 inserted at the open end 2 between the back base fabric 4 and the back base fabric 5 as shown in FIG.

FIG. 4 is a perspective view showing another example of the dust-proof glove according to the present invention, and the dust-proof glove 7b is different from the dust-proof glove 7d shown in FIG. It is different in that it is enlarged and inserted.

In the case of gloves, dust generated inside the hand is released to the outside through the open end, but the surface charge of the electret sheet generates an induced charge in the backing fabric (other sheets).
This traps the emitted dust and suppresses the dust outlet.

FIG. 5 is a perspective view showing an example of dustproof shoes according to the present invention. In the dustproof shoe 9a, an electret sheet 3 is inserted between a back base fabric (skin) 4 and a back base fabric (skin) 5 at the open end 2 as shown in FIG.

FIG. 6 is a perspective view showing another example of dustproof shoes according to the present invention. The dustproof shoe 9b is an example in which an electret sheet 3 is also used at the front opening end 2 as shown in FIG.

FIG. 7 is a perspective view showing an example of the dustproof shoe cover according to the present invention. The dust-proof shoe cover 11 has an electret sheet 3 inserted between the front base 4 and the back base fabric at the open end 2, as shown in FIG.

In the case of shoes or shoe covers, the electrical force of an electret sheet with a surface charge generates an induced charge on the surface of the other sheet, and this charge traps dust and bacteria released from the open end.

Note that the electret sheet used at the opening end of each of these dust-proofing auxiliary materials according to the present invention is not limited to being inserted between the back base fabric and the back base fabric as shown in FIG. Alternatively, the electret sheet can be attached directly to the backing fabric, but it is preferable to use an electret sheet covered with the backing fabric in order to prevent the damping effect of the electret sheet. Moreover, the electret sheet may be used in a continuous state over the entire open end, or may be used in a discontinuous state. In short, there is no particular limitation as long as the dustproof effect can be achieved by attaching the electret sheet.

Therefore, the electret sheet can be attached to the open end by any method such as sewing, adhesive, or fusion, and can be made detachable if necessary.

Electret sheets are non-woven fabrics, knitted/woven fabrics, films,
Various sheet-like materials such as sponges can be used.

As the material for the electret sheet, inorganic dielectric materials such as polyolefin (polypropylene, polyethylene, polystyrene), polyester, polyamide, fluorine resin, polycarbonate, PVC, polyacrylonitrile, glass, etc. can be used.

As the backing fabric, synthetic fibers, natural fibers, and conductive fibers can be used.

Also, synthetic leather, natural leather, etc. can be used.

As the backing fabric, any sheet material such as a fiber sheet, film, or sponge can be preferably used.

As for the material, a material similar to the above-mentioned backing fabric can be used.

However, it is preferable to select a material having a covering surface charge density of 2×10 to 11 C/ri or more for the electret sheet, and a sheet made of cotton with a thickness of 200 q/− or less and a thin, rough structure is preferable.

Incidentally, the dust-proofing auxiliary material of the present invention may be other auxiliary materials such as arm strength bars, triangular cloth for covering the head, and other auxiliary materials such as strength bars, triangular cloth for covering the head, and other materials.
The electret sheet can also be attached to and used as a covering cloth for precision equipment.

The surface charge density is measured by the method shown in FIG.

A sample to be measured (for example, a fiber sheet) 12 is placed on a ground metal plate 13, and another metal electrode 14 (4 cm diameter) is brought into contact with it from above to induce an electric charge on the metal surface.
The electric charge is accumulated in the cell 5, and the electric potential is measured by the electrometer 16 and calculated using the following formula.

Surface charge density (C/cJ) = CxV/SC: Capacitor volume (farad) V: Potential (volt) S: Electrode area (cnf) [Example] Example 1 A dustproof hat shown in Figure 1 was prototyped. .

The back base fabric was a plain woven fabric using polyester filament yarn 100D with a warp yarn density of 112 yarns/in and a weft yarn density of 88 yarns/in. A similar base fabric was used for the back base fabric (other sheets). A polypropylene film (80 μm) was used as the electret sheet.

In the electret formation method, a polypropylene film was placed on a ground electrode, and a high DC voltage was applied using a needle electrode to inject charges.

Its surface charge density was 6.1 x 10-9c10f.

In addition, the charge density on the surface of the other sheet is 3.5X10-100
/ayf.

This electret film was attached around the spinning opening with a width of 3.5 cm.

A dust generation test was conducted in a class 1 clean room while wearing the hat of the present invention.

As a result, compared to a hat without an electret sheet,
The hat of the present invention was able to reduce the amount of dust generated by half. The amount of dust generated was measured using a dust counter (manufactured by Hitachi, Ltd.).

Example 2 Dust-proof gloves shown in FIG. 3 were prepared.

A tricot knitted fabric was prepared using polyester filament yarn 130D as the backing fabric, with a course of 23 S/cm and a wale of 11 S/cm.

The same base fabric was used for the back base fabric ((l!! sheet). As the electret sheet, a knitted fabric using polypropylene filament yarn 130D was created. With the electret, high DC voltage was applied between the ground electrode and the needle electrode. The electret sheet was made into 1q using the charge injection method.

The surface charge density of the electret sheet is 5X10-10
It was C/ri. The surface charge density of the other sheet surface is 8X
It was 10”c/cnf.

During insertion of the electret sheet, it was placed around the opening at a distance of 4 cm.

As a result of testing the amount of dust generated from the opening in a class 1 clean room while wearing the gloves of the present invention using a dust counter, it was found that when the electret sheet was attached, compared to when the electret sheet was not attached, It was found that the amount of g generated could be suppressed to about 172.

Example 3 Using the same front and back fabrics as in Example 2, the dustproof gloves shown in FIG. 3 were made.

Note that a polypropylene film (120 μm) was used as the electret sheet.

The surface charge density was 5×10-9010yf. The surface charge density of the backing fabric (other sheets) was 7×10”C/−.

As a result of a similar test in a clean room using the gloves of the present invention, it was possible to suppress the dust generation opening to one-third compared to the case where no electret sheet was used.

Example 4 Dust-proof shoes shown in FIG. 5 were made.

Using polyester filament 100D as the backing fabric, the warp thread density is 112 threads/in, and the weft thread density is 88 threads/in.
A plain woven fabric was used in n. Additionally, both vertically and horizontally 7mm
Conductive threads were woven at intervals.

Polyester multifilament 100 as backing fabric
D, warp thread density 111 threads/in, weft thread density 8
Plain weave was used at 7 strands/in.

As the electret sheet, an electret polypropylene film (220 μm) was used.

The electret method was created by installing a polypropylene film between a ground electrode and a needle-like electrode, and injecting a charge using high DC voltage.

Its surface charge density was 5 x 10-9c/ffl.

In addition, the surface charge density of the other sheet (back base fabric) surface is 7.5
x10-''C/cJ.

Tests 1 to 1 were conducted in a class 1 clean room by wearing the shoes of the present invention with socks. Compared to shoes not using an electret sheet, the shoes of the present invention using an electret sheet were found to be effective in suppressing the amount of dust generated to 1/3 or less.

Example 5 A dustproof shoe cover shown in FIG. 7 was prepared.

A plain woven fabric with a warp thread density of 112 threads/in and a weft thread density of 88 threads/in was prepared using polyester filament yarn 100D for the back base fabric.

Further, the same base fabric as described above was used for the back base fabric (other sheets). A polypropylene film (120 μm) was used as the electret sheet.

In the electretization method, the film was placed on a ground electrode, and a high voltage was applied using a needle electrode to inject charges.

The surface charge density of this electret sheet is 6゜5X1
It was 0-9G/bat. The charge density on the surface of the back fabric (other sheet) was 4.5 x 10-10c/ayf. Also,
Stretchable material is attached to the opening to improve the fit to the foot.

A wear test was conducted in a class 1 clean room using the shoe cover of the present invention as a normal cover.

The shoe cover of the present invention using an electret sheet was found to be effective in suppressing the amount of dust generated to about 1/2 compared to a shoe cover that does not use electret.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a dustproof hat according to the present invention;
FIG. 2 is a perspective view showing another example of the dustproof hat according to the present invention, FIG. 3 is a perspective view showing one example of the dustproof glove according to the present invention, and FIG. 4 is a perspective view showing another example of the dustproof glove according to the present invention. FIG. 5 is a perspective view showing another example of dustproof shoes according to the present invention; FIG. 6 is a perspective view showing another example of dustproof shoes according to the present invention; FIG. 7 is a perspective view showing an example of the dustproof shoe cover according to the present invention, FIG. 8 is a sectional view of the opening end, and the other nine figures are schematic views showing a surface charge density measuring device. 1a, 1b: Dustproof cap 2: Open end 3: Electret sheet 4: Back base fabric 5: Back base fabric (other sheet) 6: Ear open end 7a, 7b: Dustproof gloves 8: Back of hand 9a, 9b : Dust-proof shoes 10 : Front opening end 11 : Dust-proof shoes cover

Claims (8)

[Claims] (1) An auxiliary material for dustproofing consisting of an electret sheet attached to at least the opening end. (2) The surface charge density of the electret sheet is 1×1
The auxiliary material for dustproofing according to claim (1), which has a temperature of 0^-^1^0C/cm^2 or more. (3) The dust-proofing auxiliary material according to claim (1), wherein the electret sheet is covered with another sheet. (4) The surface charge density of the other sheet surface is 2×10^-^1
The dust-proofing auxiliary material according to claim (3), which has a dust-proofing property of ^1C/cm^2 or more. (5) Claim No. 1 (1) in which the dust-proof accessory material is a hat.
Supplementary materials for dust prevention listed in ). (6) Claim No. 1 (1) in which the dust-proofing auxiliary material is a glove.
Supplementary materials for dust prevention listed in ). (7) Claim No. (1) in which the dustproof secondary material is shoes
Auxiliary materials for dust prevention as described in section. (8) The dust-proofing auxiliary material according to claim (1), wherein the dust-proofing auxiliary material is a shoe cover.