JPH11206697A - Adsorbent-adherent body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adsorbent-adherent body wherein there is no re-splashing of dust and dirt, and dust and dirt in recessed parts are adsorbed even when there is no direct contact, and the dust and dirt are firmly fixed to an adherent layer, and removed. SOLUTION: Magnetic body particles (or dielectric body particles) are contained in an adherent agent, and an adsorbent-adherent body layer 7 is formed by applying the adherent agent on a base material 3, and an adsorbent-adherent body sheet 6 is prepared, and the adsorbent-adherent body sheet 6 is arranged at a specified place with the adherent surface facing upward. When a carrier of dust and dirt 5 (in this case, the sole of a shoe) is brought into contact with the adsorbent-adherent body sheet 6, the dust and dirt 5 at the contact point naturally adhere to the adsorbent- adherent body layer 7 of the adsorbent-adherent body sheet 6, and are removed. Among the dust and dirt 5 on non-contact parts, magnetic dust and dirt, if the magnetic body particles in the adsorbent-adherent body layer 7 is a magnetized rigid magnetic body, are drawn by the gradient magnetic field which is formed around the magnetic body particles by magnetization of the magnetic body particles, and are drawn and fixed to the adsorbent-adherent body layer 7 and removed. Also, flexible magnetic dust and dirt 5 are magnetized by the gradient magnetic field, and are drawn by the magnetization, and fixed and collected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive for preventing dust from being introduced into a clean space such as a clean room, and relates to a dust carrier or a carrier.
Is related to a suction-adhesive body that can remove minute dust adhering to a carrier even in a non-contact state.

[0002]

2. Description of the Related Art Conventionally, a carrier (dust carrier, dust carrier, etc.) is installed in a clean space from the outside, for example, a clean room or a hospital room.
Means for preventing dust brought in from the outside by means of such a method include a method of removing dust adhering to the outer periphery by blowing clean air, and a method of placing an adhesive sheet coated with an adhesive on the surface on the floor. Many measures are taken according to the degree of cleanliness and the purpose of dust removal.

FIG. 2 is a diagram illustrating a state in which dust is removed from a shoe sole by a conventional adhesive sheet. As shown in FIG. 2, the conventional pressure-sensitive adhesive sheet 1 has a pressure-sensitive adhesive layer (pressure-sensitive layer 2) made of an adhesive or the like applied on a substrate 3 such as a film. The sheet is placed on a floor or the like with the adhesive side facing up [see FIG. 2 (a)]. When a carrier (for example, a shoe sole 4 or the like) passes over and comes into contact with the adhesive sheet 1 (see FIG. 2B), dust 5 such as fine powder adhered to the surface of the contacted carrier is adhered. Dust remains on the sheet when it is taken into the adhesive on the sheet 1 and the carrier leaves the adhesive sheet [FIG.
(C)]. As described above, the dust removing tool takes in the dust on the surface of the carrier and contacts the adhesive sheet.

[0004]

However, in order to remove the dust on the carrier surface, the dust must directly contact the adhesive layer of the adhesive sheet. That is, if the dust does not directly contact the adhesive sheet, it will remain on the carrier as it is.

[0005] For example, the carrier shown in FIG. Grooves 8 are often dug in the sole 4 to prevent slippage. The dust 5 also enters the depth of the groove 8. Since the dust 5 does not directly contact the adhesive sheet 1, the dust 5 remains on the shoe sole 4 as it is, and only the dust 5 in contact with the dust is removed by the adhesive sheet 1.
The portion of the groove that is not in contact with the adhesive sheet will remain as a beautiful shoeprint pattern. Dust inside the groove enters the room together with the shoe sole (carrier). This dust eventually falls off the shoe sole and is brought into a clean room or the like.

[0006] As described above, in the case of using only the adhesive sheet, it is difficult to remove dust adhering to the concave portion from an uneven surface such as a shoe sole or a woven cloth. Although it is possible to remove by wind pressure etc., since it scatters around,
Equipment for collecting this is required, and large-scale equipment is required.

[0007] Dust removing materials, such as chemical rags, which make chemicals less likely to be scattered by adhering chemicals to fibrous materials are also commercially available. There is also a method of taking in dust from objects in contact with it and removing the dust. In this case, the surface of such a dust removing material has some irregularities, and a small amount enters into the concave portion on the surface of the carrier to remove the dust. In any case, the dust on the carrier is directly contacted with the dust. This is a method of removing dust, and the dust behind it cannot be removed. Also, in this case,
Unlike a suction sheet or the like, there is a problem that suction is incomplete and dust re-scatters easily.

[0008] The present invention relates to an adhesive body suitable for dustproofing using an adhesive sheet or the like for easily removing dust on a carrier which is difficult to remove by wind pressure or the like.

[0009] That is, an object of the present invention is to provide a suction-adhesive body which does not re-spray dust, adsorbs dust even in a concave portion without direct contact, and can be fixed firmly to an adhesive layer to remove dust. It is.

[0010]

Means for Solving the Problems The present inventor has conducted various studies to solve the above-mentioned problems. As a result, the present inventors have found that a magnetic material or a dielectric particle is contained in an adhesive layer as a dust removing material. Adhesives are used in the form of sheets, plates, rods, threads, paper, non-woven fabrics, woven fabrics, etc., or are made of an adhesive material impregnated and impregnated in a base material of metal, plastic, animal or plant fiber, etc. It has been found that dust having magnetization or electric charge in a non-contact state can be sucked by a suction force and fixed to the suction-adhesive body by the adhesive force of the adhesive.

It is not necessary that the magnetic particles and the dielectric particles are completely mixed in the adhesive. For example, it may be concentrated in the middle between the base material and the pressure-sensitive adhesive layer, or may be dispersed in the base material.

That is, the present invention provides: It is a pressure-sensitive adhesive body that contains magnetic particles in a pressure-sensitive adhesive body in which a base material is coated or impregnated with a pressure-sensitive adhesive.

Further, the present invention provides: The adsorbent body contains dielectric particles in the adhesive of the adsorbent obtained by applying or impregnating the adhesive on the base material.

Further, the present invention provides: It is an adhesive body containing magnetic particles and dielectric particles in an adhesive body in which an adhesive is applied or impregnated on a substrate.

[0015] The present invention also provides: 2. The adhesive body according to 1 or 2 above, wherein hard magnetic particles are used as the magnetic particles.

Further, the present invention provides: 4. The adhesive body according to the above item 2 or 3, wherein hard dielectric particles are used as the dielectric particles.

Further, the present invention relates to 6. This is an adhesive body in which either magnetic particles or dielectric particles are intensively arranged between an adhesive layer and an adhesive layer in which an adhesive is applied or impregnated on a substrate.

Further, the present invention provides a method according to 7. The method according to any one of the above 1 to 5, wherein any one of magnetic particles or dielectric particles is intensively arranged in the middle of the pressure-sensitive adhesive substrate in which the pressure-sensitive adhesive is applied or impregnated on the substrate. It is an adhesive body.

The present invention also relates to 8. This is an adhesive body in which magnetic particles and dielectric particles are intensively arranged between an adhesive layer and an adhesive body in which an adhesive is applied or impregnated on a substrate.

Further, the present invention relates to 9. The above-described 1-5, wherein the magnetic particles and the dielectric particles are intensively arranged between the adhesive layer and the adhesive substrate in which the adhesive is applied or impregnated on the substrate.
The adhesive body according to any one of the above.

[0021] The present invention also relates to the present invention. An adhesive body in which either magnetic particles or dielectric particles are dispersed and disposed in an adhesive body in which an adhesive is applied or impregnated on a substrate.

Further, the present invention relates to 11. The adhesive body according to any one of the above 1 to 9, wherein any one of the magnetic particles or the dielectric particles is dispersed and arranged in the adhesive body in which the adhesive is applied or impregnated to the substrate. .

Further, the present invention relates to 12. An adhesive body in which magnetic particles and dielectric particles are dispersed and arranged in an adhesive body in which an adhesive is applied or impregnated on a substrate.

In addition, the present invention relates to a thirteenth aspect. The adhesive body according to any one of 1 to 9, wherein the magnetic substance particles and the dielectric particles are dispersed and arranged in an adhesive body in which an adhesive is applied or impregnated on the substrate.

[0025]

Embodiments of the present invention will be described below. Magnetic material particles, dielectric particles, or a pressure-sensitive adhesive having a layer of a pressure-sensitive adhesive containing a mixture thereof in a pressure-sensitive adhesive adhered to a base material, or magnetic particles, dielectric particles, or Is an adhesive body in which the mixture of the above is interposed between the layers around the adhesive layer or in the substrate, and the adhesive body is the adhesive force of the adhesive layer and the magnetic material integrally disposed around the adhesive layer. Due to the magnetic and electric attraction of the particles and the dielectric particles, it is possible to adsorb and remove not only dust directly in contact with the adhesive but also dust that can induce magnetization and electric charge with nearby dust that is not in direct contact.

A description will be given of an example of magnetic particles. FIG.
FIG. 2 is a cross-sectional view illustrating a state in which dust is removed on an adhesive sheet according to an embodiment of the present invention.
As shown in FIG. 1, the magnetic material particles are contained in an adhesive, and this is applied on a base material 3 to form an adhesive layer 7, thereby producing an adhesive sheet 6. Is placed in a predetermined place with the adhesive surface of the surface facing upward [see FIG. 1 (a)].

When a carrier of the dust 5 (here, the shoe sole 4) is brought into contact with the adhesive sheet 6 (see FIG. 1 (b)), the dust 5 at the contact point is, of course, removed.
Adheres to the adhesive layer 7 and is removed. Of the dust 5 in the non-contact portion (here, the groove 8 in the shoe sole 4), the magnetic dust is a hard magnetic material in which the magnetic particles in the adhesive layer 7 are magnetized. Then, it is sucked by the gradient magnetic field formed therearound, is sucked and fixed to the adhesive layer 7, and is removed [see FIG. 1 (c)]. The soft magnetic dust 5 is magnetized by the gradient magnetic field, is attracted by the magnetization, and is fixed and collected on the adhesive layer 7.

When the magnetic particles dispersed in the adhesive layer 7 are soft magnetic materials, the magnetic particles in the adhesive layer are magnetized by providing a magnetic field generator around the magnetic particles. As in the case of the hard magnetic particles, the magnetic dust can be adsorbed and fixed in a non-contact state by the magnetization of the surface of the particles to remove the dust.

Also, similarly to the case of the magnetic particles, when the dielectric particles are mixed in the adhesive, the polarized or charged charged dust is sucked and fixed to the adhesive layer to remove the dust. . Also in this case, if the dielectric particles are soft, dust can be removed in a non-contact state by using the dielectric particles together with an external electric field generator.

[0030]

The present invention will be described below in detail with reference to examples.

(Example 1) Ferrite powder was contained in a polyurethane resin-based adhesive in an amount of 0 vol% to 30 vol% and kneaded. The produced pressure-sensitive adhesive was left in a magnetic field of 30 kOe and magnetized. Thereafter, a pressure-sensitive adhesive was spread on a polyethylene terephthalate (hereinafter referred to as PET) film sheet so as to have a thickness of 100 μm, thereby producing a pressure-sensitive adhesive sheet.

Four types of adhesive sheets coated with an adhesive having different ferrite powder contents and a PET film sheet coated with no adhesive were prepared. Similar shoes were put on each of the five sheets under a load of 30 kg for 1 minute. 50 μm on the sole as artificial dust
The following iron powders were uniformly sprinkled, and the weight of the shoes before and after being left on the sheet was measured. The weight change of the shoe when the sheet was not coated with an adhesive was set to 100, and the removal rate of dust (iron powder) from each of the adhesive sheets was determined. In obtaining the removal rate, the measurement was performed 50 times for each type of sheet, and the average value was obtained. Table 1 shows the content of the ferrite powder contained in the pressure-sensitive adhesive and the dust removal rate of the pressure-sensitive adhesive sheet using the pressure-sensitive adhesive.

[0033]

As can be seen from Table 1, the adhesive sheet of the present invention using the adhesive containing magnetized magnetic powder has a higher dust removal rate than the conventional adhesive sheet containing only the adhesive. I understand.

Example 2 0 vol% of ferrite powder
A polyethylene resin mixed and kneaded in an amount of 30 vol% to 30 vol% was molded into a film to form a 200 μm sheet. The produced sheet was left in a magnetic field of 30 kOe and magnetized. After that, the pressure-sensitive adhesive was applied on the prepared sheet to a thickness of 100 μm.
m to give an adhesive sheet.

[0036] Four types of adhesive sheets were prepared by applying a pressure-sensitive adhesive to sheets having different ferrite powder contents, and a PET film sheet not coated with a pressure-sensitive adhesive was prepared. A similar shoe is weighted on each of the five types of seats.
kg and left for 1 minute. Iron powder of 50 μm or less was sprinkled uniformly on the shoe sole as artificial dust, and the weight of the shoe before and after standing on the sheet was measured. The change in the weight of the shoe when the sheet was not coated with an adhesive was defined as 100, and the dust (iron powder) removal rate of each of the adhesive sheets was determined.
In obtaining the removal rate, the measurement was performed 50 times for each type of sheet, and the average value was obtained. Table 2 shows the content of the ferrite powder contained in the sheet and the dust removal rate of the adhesive sheet using the adhesive.

[0037]

As can be seen from Table 2, in the adhesive sheet of the present invention using the sheet containing the magnetized magnetic powder, the dust removal rate was lower than that of the conventional adhesive sheet made from the sheet not containing the magnetic powder. Turned out to be high.

(Example 3) A pressure-sensitive adhesive prepared by mixing and kneading 30 vol% of ferrite powder as a magnetic material powder with a polyurethane resin-based pressure-sensitive adhesive prepared in the same manner as in Example 1 was left in a 30 kOe magnetic field. And magnetized. In addition, a polyurethane resin containing 30 vol% of ferrite powder and kneaded, which was produced in the same manner as in Example 2, was molded into a film to form a 200 μm sheet. The produced sheet was left in a magnetic field of 30 kOe and magnetized.

An adhesive containing the magnetic powder was spread on the substrate sheet containing the magnetic powder so as to have a thickness of 100 μm to prepare an adhesive sheet.

An adhesive sheet containing ferrite powder,
An adhesive sheet containing no ferrite powder in both the adhesive and the sheet was prepared. The same shoes were placed on the sheet for 1 minute with a weight of 30 kg. Iron powder of 50 μm or less was sprinkled uniformly on the shoe sole as artificial dust, and the weight of the shoe before and after being left on the sheet was measured. The dust (iron powder) removal rate of each pressure-sensitive adhesive sheet was determined, taking the weight change of the sheet not coated with the pressure-sensitive adhesive as 100. In obtaining the removal rate, the measurement was performed 50 times for each type of sheet, and the average value was obtained. Table 3 shows the dust removal rates of the adhesive sheet containing ferrite powder and the adhesive sheet containing neither the adhesive nor the ferrite powder.

[0042]

As can be seen from Table 3, the adhesive sheet containing the magnetized magnetic powder and the adhesive sheet using the base sheet of this example were prepared from the conventional adhesive and sheet containing no magnetic powder. It was found that the dust removal rate was higher than that of the pressure-sensitive adhesive sheet.

In the above embodiment, the case where the magnetic particles are dispersed and contained in the pressure-sensitive adhesive layer or the base material layer has been described. However, the same effect as in the above embodiment can be obtained.

Further, in the above-described embodiment, the description has been made with the magnetic particles. However, the same effect can be obtained with the dielectric particles with respect to the dielectric dust.

In the above-described embodiment, the shape of the base material is described as a sheet-like base material. However, other forms such as a plate, a rod, a thread, a nonwoven fabric, a woven fabric, and other materials may be used. However, the same effect can be obtained.

[0047]

According to the present invention, it is possible to remove not only dust on the carrier contact surface from which dust is to be removed but also dust on a non-contact surface such as a concave portion by magnetic or electrostatic attraction. As a result, it has become possible to provide an adhesive body having a high removal rate of ceramic or metal fine powder.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a state of adsorbing dust on a mat according to an embodiment of the present invention, FIG. 1 (a) is a diagram showing a state before dust removal, and FIG. FIG. 1C is a view showing a state after dust removal.

FIG. 2 is a cross-sectional view illustrating a state of adsorbing dust on a conventional adsorbing sheet, and FIG.
FIG. 2B is a view showing dust removal, and FIG. 2C is a view showing dust removal.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 adhesive sheet 2 adhesive layer 3 base material 4 shoe sole 5 dust 6 adhesive sheet 7 adhesive layer 8 groove

Claims (13)

[Claims] 1. A pressure-sensitive adhesive body comprising magnetic material particles contained in a pressure-sensitive adhesive having a substrate coated or impregnated with a pressure-sensitive adhesive. 2. A pressure-sensitive adhesive body, comprising dielectric particles contained in the pressure-sensitive adhesive of an adsorbent obtained by coating or impregnating a pressure-sensitive adhesive on a substrate. 3. A pressure-sensitive adhesive body, wherein the pressure-sensitive adhesive of a pressure-sensitive adhesive body obtained by coating or impregnating a pressure-sensitive adhesive on a base material contains magnetic particles and dielectric particles. 4. The adhesive body according to claim 1, wherein hard magnetic particles are used as the magnetic particles. 5. The adhesive body according to claim 2, wherein hard dielectric particles are used as the dielectric particles. 6. The method according to claim 1, wherein one of magnetic particles or dielectric particles is intensively arranged between the pressure-sensitive adhesive layer and the pressure-sensitive adhesive substrate having the pressure-sensitive adhesive applied or impregnated on the substrate. Adhesive body. 7. A method in which one of magnetic particles or dielectric particles is intensively arranged between a pressure-sensitive adhesive layer and a pressure-sensitive adhesive substrate in which a pressure-sensitive adhesive is applied or impregnated on a substrate. The adhesive body according to claim 1. 8. An adhesive body wherein magnetic particles and dielectric particles are intensively arranged between an adhesive layer and an adhesive body in which an adhesive is applied or impregnated on a substrate. . 9. The method according to claim 1, wherein the magnetic material particles and the dielectric particles are intensively arranged between the pressure-sensitive adhesive layer and the pressure-sensitive adhesive substrate in which the pressure-sensitive adhesive is applied or impregnated on the substrate. ~ 5
The adhesive body according to any one of the above. 10. An adhesive body, wherein one of magnetic particles and dielectric particles is dispersed and disposed in an adhesive body in which an adhesive is applied or impregnated on the substrate. 11. The magnetic material or the dielectric particles are dispersed and arranged in an adhesive body in which an adhesive is coated or impregnated on a substrate. The adhesive body according to any one of the above. 12. An adhesive body, wherein magnetic particles and dielectric particles are dispersed and arranged in an adhesive body in which an adhesive is applied or impregnated on a substrate. 13. The method according to claim 1, wherein the magnetic material particles and the dielectric particles are dispersed and arranged in an adhesive body in which an adhesive is applied or impregnated on the substrate. The adhesive body according to 1.