JPH1034091A - Roller for washing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly obtain a uniform and highly accurate washing effect by disposing many projections of which the apexes form a virtual plane on the front surface of a roller for washing, thereby forming a face used for washing and forming the shape of these projections to an elliptic shape, thereby specifying the ratio of the width and length in a circumferential direction to a specific value or above. SOLUTION: This roller 1 for washing is composed of, for example, a pVAt porous body and the shape of the many projections 2 which are formed on its front surface and are the washing surfaces is formed to the elliptic shape. Plural pieces of the projections are disposed in one row and the projections 2 are disposed always in the next row in the position of the spacings generated between the projections 2 on the one row. The ratio of the width and length in the circumferential direction of the elliptic projections 2 is so determined as to attain the ratio of the length to the width of >=2:1 of the projections 2 and a height of <=1 to the width 1. As a result, the force that the one projection 2 wipes away particles is larger as the length of the projections 2 is larger than the width. The removal of the more particles in a short period of time is thus made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended for long-life cleaning, which enables highly effective cleaning without damaging the surface of the object to be cleaned, and can exhibit a stable cleaning effect for a long time use. About rollers.

[0002]

2. Description of the Related Art When finishing surfaces of metals, glass, plastics, etc. with extremely high precision, that is, so-called mirror finishes, using a lathe, a grindstone, or free abrasive grains in a stepwise manner. , Cutting chips in each stage, polishing debris, whetstone or dust in air or polishing liquid,
It is necessary to completely remove the residual particles until the contaminants reach the next step in each step.

[0003] Conventionally, to remove such deposits, a brush roller for cleaning in which a large number of synthetic fibers, for example, nylon monofilaments are planted around a thin rod-shaped core, and a cylindrical roller in which a suede-like synthetic leather is adhered to the outer periphery. While continuously supplying a cleaning liquid, for example, water, water containing a detergent, or an organic solvent, a method of rotating the roller and rubbing the surface of the object to be cleaned to remove deposits is used. Had been taken. However, these conventional rollers have poor hydrophilicity and high rigidity, and when the rollers are rotated to rub the surface of the object to be cleaned, the hair tips or falling objects may damage or contaminate the object to be cleaned. However, the cleaning effect was insufficient and the ability to completely remove the residual particles was lacking.

Accordingly, the inventors of the present invention have considered polyvinyl acetal (hereinafter abbreviated as PVAt) as having high hydrophilicity and flexibility, having very little damage to the object to be cleaned when rubbing and having an excellent cleaning effect. A cleaning roller using a porous body as a material and having a large number of projections on its surface has been devised, and a cleaning method using the roller has already been proposed. Further, after that, an improvement plan with a higher cleaning effect has been proposed by arranging the projections as cleaning surfaces in a spiral shape.

[0005]

In the above conventional method,
Although cleaning materials in the general cleaning field worked satisfactorily, in recent years cleaning materials in the cleaning field requiring high cleanliness in the manufacturing process of silicon wafers, etc., have solved uniform cleaning. The means of doing so was not sufficient.

In the conventional method, since the shape of the projection is cylindrical, when the roller is rotated and the surface of the object to be cleaned is rubbed, the projection rebounds in a direction different from the rotation direction to leave the cleaning. Occurs, and therefore, a very small spot pattern may be generated on the surface of the object to be cleaned. In order to solve this problem, a roller with a groove in the length direction was also devised, but this time, when the surface of the object to be cleaned was rubbed, the power to disperse the particles was uneven, and the cleaning ability was rather changed. Was to be reduced.

[0007] In addition to cleaning unevenness, since a relatively long cleaning time is required, there has been a demand for a cleaning material which can achieve a cleaning effect in a shorter time and with higher accuracy.

[0008] Further, use under cleaning conditions in which the number of rotations of the cleaning roller is large, use under cleaning conditions in which the contact pressure with the object to be cleaned is high, or the required degree of cleaning is not so high, In applications that are used for a long period of time, for example, in the process of cleaning glass for liquid crystal, etc., the shape of the projection, which is the cleaning surface of the conventional cleaning roller, has insufficient strength, and the projection loses or falls off during cleaning. A problem has occurred, and the cleaning effect cannot be maintained for a long time, or in some cases, the dropped cleaning material causes a problem of reverse contamination.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cleaning material capable of obtaining a uniform and highly accurate cleaning effect in a short time and maintaining the cleaning effect for a long time, while paying attention to the above conventional problems. It is in.

[0010]

In order to solve these problems, the present inventors have made intensive studies on the shape of the projections, which are the cleaning surfaces, and as a result, the present invention has found that a large number of cleaning surfaces formed on the surface of the cleaning roller are provided. By making the shape of the projections elliptical and arranging a plurality of projections in one row, the projections must be arranged in the next row at the positions of the gaps formed between the projections in one row. Solved one problem.

One is that the next projection is disposed at the position of the gap formed between the projections on the same row, so that there is theoretically no residue when the projection is cylindrical. When the roller is rotated and the surface of the object to be cleaned is rubbed, the projections bounce in a direction different from the rotation direction, so that in actual use, unwashed portions may occur. Since the springs only bounce in the direction of rotation, there is no wash residue in theory or in actual use.

Secondly, in the grooved shape, the force for dispensing particles was uneven depending on the location, but by setting the length of the ellipse within a certain range, the force for dispensing particles was the same for any projection. It has become.

Regarding the shape of the elliptical projection, the height is 1 or more with respect to the width 1 at a ratio of 2 or more to the width 1 of the projection.
Further, the width is formed at a ratio of 1/10 to 1/30 with respect to the outer periphery of the cleaning roller at the following ratio, and furthermore, the position of the projection is 0 with respect to the rotation axis of the cleaning roller.
What is provided at a position having an angle within the range of the position twisted by 45 degrees has reached a conclusion that solves the above problem.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to examples and comparative examples.

[0014]

Example 1 Porosity: about 90%, average pore diameter: about 130 μm
A cleaning experiment was performed using a PVAt-based porous material having a radius of 60 mm including a projection portion and a length of 150 mm, and changing the length of the projection with respect to the width. is there. The test method is as follows. The aluminum disk used for the disk is finally polished with loose abrasive grains and roughly washed with running water as a sample, and a cleaning experiment is performed using a cleaning roller having various projections according to the present invention. At this time, the cleaning liquid used was pure water subjected to a particle controller, and had a structure in which the cleaning liquid was applied to the object to be cleaned in a shower shape before and after the cleaning roller. The experimental conditions were as follows, and the average of five tests was taken. Feeding speed of aluminum disk = 5 m / min Rotation speed of cleaning roller = ²⁰⁰ RPM Contact pressure = 10 g / cm ^{2 A} predetermined number of particles is assumed in advance, and the time required for the particle count and the projections are made at regular intervals. And the evaluation was performed by the time until the protrusions were defective. Table 1 shows the results. As can be seen from Table 1,
When the width ratio of the projections was 1 and the ratio of the lengths exceeded 1, the time required for the cleaning effect to be obtained (hereinafter, referred to as “effective time”) was shortened. . In addition, since the time required for a protrusion to be lost (hereinafter referred to as “life”) has been lengthened, the longer the length of the protrusion is, the longer the protrusion is in relation to the width. It has been found that the power to remove the particles increases and more particles are removed in a short time. Furthermore, the longer the length, the greater the strength in the rotation direction of the protrusion, which leads to a longer life.

[0015]

[Table 1] (Note) * is a comparative example, and all numerical values are based on this. Judgment ○ = Effective effect was observed △ = Effect was almost equivalent to Comparative Example × = Effect was inferior to Comparative Example (Similar determination was made for Tables 2 and 3)

[0016]

Example 2 A test and an evaluation were performed on the cleaning roller having the shape effective in Example 1 under the following conditions. Table 2 shows the results. Except for the following conditions, it was the same as Example 1. The height ratio is 0.6, 0.
8, 1.0, 1.2, 1.4. As can be seen from Table 2, the ratio of the height when the width of the projection is 1 does not exceed 1, under any condition. The effect time was also shortened, but the effect time was prolonged in all cases where the ratio exceeded 1. In addition, the results show that the life is longer under any conditions because of the longer length of the protrusion. From this, it was found that when the ratio of the height of the projection to the width was smaller than 1, the force of the projection to remove particles was increased, so that the cleaning effect was enhanced and the life was prolonged.

[0017]

[Table 2]

[0018]

Example 3 A test and an evaluation were performed in the same manner as in Example 1 except that the cleaning roller having the effective shape based on the results of Examples 1 and 2 was used under the following conditions. Table 1 shows the results. Protrusion width = 1/3, 1/1, with respect to the diameter of the cleaning roller
5, 1/10, 1/15, 1/20, 1/30. According to this, when the width of the projection is larger than 1/5 of the diameter, the width of the projection is too large. The original `` pay-out '' action is not performed, and the particles become dragged, making it easier for the particles to enter the tissue of the cleaning roller.The protrusions do not lose, but they can cause clogging. all right. On the other hand, when the width of the projection is smaller than 1/20 in diameter, the cleaning effect is reduced because the force for removing particles is weak.

[0019]

[Table 3]

[0020]

[Comparative Example] Evaluation was performed using a conventional protrusion having a circular shape. The conditions are the same as in the first embodiment. Table 1 shows the results. Further, regarding the torsion angle of the arrangement of the protrusions, there is no difference in the operation if the angle is 45 degrees or more with respect to the rotation axis of the roller.

[0021]

According to the present invention, a uniform and highly accurate cleaning effect can be obtained in a short time, and the strength of the projections is improved, so that the cleaning effect can be maintained for a long time.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a cleaning roller of the present invention. (A) It is a front view of the roller for washing | cleaning. (B) It is AA 'sectional drawing of (a).

FIG. 2 is an explanatory view of another example of the cleaning roller of the present invention.

FIG. 3 is an explanatory diagram of a change in the shape of a projection during cleaning.

[Explanation of symbols]

 1 Cleaning roller 2 Projection

Claims (7)

[Claims] 1. A cleaning roller for bringing a surface to be used for cleaning into contact with a surface to be cleaned of a body to be cleaned and rotating and performing cleaning, wherein the cleaning roller is made of an elastic porous body. A plurality of projections are arranged on the surface of the cleaning roller, and the tops of the projections form a virtual plane to form a surface used for the cleaning; A cleaning roller having a width to length ratio of 1 to 2 or more. 2. The cleaning roller according to claim 1, wherein the projections are formed in a plurality of rows, and the rows of the projections are provided at an angle of 0 to 45 ° with respect to the axis of the roller. . 3. The method according to claim 1, wherein the width of the protrusion is in the range of 1/10 to 1/36 of the diameter of the cleaning roller, and the height is formed at a ratio of 1 or less to the width of 1. The cleaning roller according to claim 1, wherein: 4. The cleaning roller according to claim 2, wherein in the row of the projections, the gap between the projections in one row is complemented by the projections in the next row in the rotation direction. . 5. A method according to claim 1, wherein a surface of said projection contacting the object to be cleaned has a curved surface shape or a semicircle shape which is outwardly convex with respect to the rotation axis of the roller. 3 and 4
A cleaning roller as described. 6. The cleaning roller according to claim 1, wherein said porous body having elasticity is a polyvinyl acetal-based porous body. 7. The polyvinyl acetal-based porous material according to claim 1,
Porosity 80-95%, average pore size 60-400μ, and 30% compressive stress in wet state 15-150g / cm
^{2. The} term claim 2, 3, 4, 5 and 6 cleaning roller according.