JP2003326468A - Resin surface polishing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin surface polishing device having an excellent easiness of handling and capable of reducing a cost required for polishing. <P>SOLUTION: In this resin surface polishing device, polishing particles are fixed to a main material formed of sponge having water absorbing and holding capacities. The percentage by weight of fallen materials when the polishing device is manually crumpled 20 times in water to a main material before immersing in water is 3.0 wt.%, desirably 2.0 wt.% or less. The primary averaged grain size of the polishing particles is 0.2 to 80 μm, desirably 1 to 60 μm. The percent by weight of polishing particles content when the percentage by weight of those components other than the polishing particles is 100 wt.% is 10 to 600 wt.%, desirably 40 to 500 wt.%. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin surface polishing tool, and more particularly to a resin surface polishing tool mainly made of a flexible synthetic resin foam called a sponge, which is used for painting a car body or for household use. The present invention relates to a resin surface polishing tool used for polishing a resin surface of a bathroom unit (integrated system bath), a resin washbasin, and other consumer or industrial resin products.

[0002]

2. Description of the Related Art In the work of polishing the surface of a resin material or the coated surface (resin surface), there has hitherto been a method of using only sandpaper, a grindstone, and abrasive grains themselves.

Further, regarding the method of removing stains on the resin surface,
Nowadays, polishing abrasive particles processed into liquid or paste (known as "compound", "polishing agent", "abrasive", etc.) are directly applied to the resin surface, and a cloth or urethane sponge or cellulose-based material is applied. The dirt is removed by rubbing with a sponge, or the cloth, urethane, or cellulosic sponge is directly coated with a liquid in which an abrasive is dispersed, and the dirt is removed while polishing the resin surface.

Further, there is a method of removing the stain by inclining the pH of the chemical solution to be alkaline or acidic, but there is a risk that the resin surface may be dissolved or deformed depending on the type of resin and the polishing time.

[0005]

However, sandpaper and grindstones are frequently clogged with polishing debris.
Further, with sandpaper, abrasive particles often fall off, and some cannot be used continuously. The whetstone is deformed as it is worn down. Further, since the hardness is high, it may be difficult for the grindstone to follow the polishing surface. When the abrasive particles themselves or a liquid or kneaded product thereof are used, the abrasive particles and the like remain on the resin surface, so extra work such as wiping them with a towel or rinsing with water is required. Further, if a large amount of chemicals is used, the chemicals will remain on the resin surface after the work is completed, and it will be necessary to wipe the chemicals again with a cloth or the like, resulting in extra time and expense. Further, during work, they may be scattered on a place other than the work surface and adhere to clothes or the like. The above is a phenomenon which can occur not only by manual work but also when an electric tool such as a sander polisher is used, and in some cases, the degree becomes severe.

From the above, "clogging" and "continuous use"
If all the items such as "scattering prevention" can be solved, it is easy to use and the cost can be reduced.

As a solution to each of the above, washing with water or use with water, fixing of abrasive grains with a binder such as resin like a grindstone, giving flexibility to the whole, abrasive particles Conditions such as not using itself or a liquid containing it can be mentioned, and if these conditions are satisfied, a polishing tool excellent in usability can be obtained,
The cost required for polishing can be reduced.

The present invention has been made in view of the above circumstances.

That is, according to the present invention, a resin surface capable of performing polishing work satisfying all the above-mentioned conditions capable of solving all the matters such as "clogging", "continuous use" and "scattering prevention". The purpose is to provide a polishing tool.

[0010]

A resin surface polishing tool according to the present invention is a resin surface polishing tool in which abrasive particles are fixed to a main material made of a sponge having a water absorbing / water-retaining ability. The weight loss of the fallen material to the main material before immersion in water is 3.0 wt% or less, the primary average particle diameter of the abrasive particles is 0.2 to 80 μm, and Weight percentage is 100 wt%
The weight percentage of the content of abrasive particles is 10 to 60
It is 0 wt%.

Further, according to the present invention, the weight percentage of the fallen material after rubbing 20 times in water with respect to the main material before immersion in water is 2.0 wt% or less, and the primary average particle diameter of the abrasive particles is Is 1 to 60 μm, and the weight percentage of the content of abrasive particles is 40 to 500 wt% when the weight percentage of components other than the abrasive particles is 100 wt%.

According to the resin surface polishing tool of the present invention, since the main material is a sponge having a water-absorbing / water-retaining ability, it is possible to retain a sufficient amount of water in the main material just by immersing the main material in water. In addition, since the main material can be used while holding water, it is possible to polish the resin surface using only the polishing tool, and clogging hardly occurs and clogging occurs. The work of frequently washing and removing is omitted or reduced.

Further, when abrasive particles are fixed to the sponge and the weight of the sponge debris and the amount of the abrasive particles fallen off by hand rubbing 20 times in water, the percentage of the sponge before soaking in water is 3.0 wt%. Below, preferably 2.0w
Since it is at most t%, the loss of abrasive particles during use is suppressed to a minimum. If the above percentage exceeds 3.0 wt%, there is a risk that polishing particles will remain on the resin surface after polishing, and extra work such as wiping off the remaining polishing particles with a towel or rinsing with water is required. There is a possibility of becoming. When the above percentage is 3.0 wt% or less, preferably 2.0 wt% or less, there is almost no possibility that polishing particles and the like will remain on the resin surface after polishing, and the polishing particles remaining on the resin surface after polishing will be removed. There is almost no need to remove it.

Furthermore, since the sponge has peculiar flexibility and elasticity, it is not scraped like a grindstone,
It naturally follows distorted work surfaces. Furthermore, since the abrasive particles are originally held by the sponge which is the main material, there is no need for a separate polishing material. Scattering of the sponge itself does not occur, so scattering does not occur.

The material of the sponge as the main material and the manufacturing method are not particularly limited. For example, urethane foam, polyvinyl acetal, melamine foam, expanded polyethylene and the like can be mentioned as an example, and a sponge manufactured by a known manufacturing method can be used as a main material.

As the abrasive particles, chromium oxide, alumina, silica stone, cerium oxide, zirconium oxide, silicon carbide, boron carbide, boron nitride, diamond, calcium carbonate, calcium phosphate, zirconium silicate, diatomaceous earth,
Zeolite etc. can be illustrated. The average particle size of the abrasive particles is a primary particle size of about 0.2 to 80 μm,
It is preferably 1 to 60 μm, and the content thereof is
When the weight of the components other than the polishing particles of the polishing tool is 100%, if the weight of the polishing particles is 10 to 600%, preferably 40 to 500%, good polishing performance is exhibited without scratching. To be done.

[0017] In the resin surface grinding tool of the present invention, the shape of the sponge which is the main material, the area 20 to 30 cm ^2, preferably has a bottom surface of 50～250Cm ^2, the height 0.3-1
It has a columnar structure of 0.0 cm, preferably 0.5 to 5.0 cm. Although not limited to this when attaching the handle, the height from the bottom surface (the surface used for polishing in contact with the work surface) to the highest point of the handle is 1.0 to 25 cm, preferably 1.5 to 10. It may be 0 cm.

The shape of the sponge used for the rotary type or double-action polisher has a circular bottom having a diameter of the pad of the polisher + (0 to 70 mm), and preferably the diameter of the pad and the sponge. The ratio may be (pad) :( sponge) = 1: (1 to 1.25). The height of the sponge may be 5 to 60 mm, preferably 10 to 40 mm. The area of the work surface is 15 to 15 when using a non-circular sponge such as an orbital sander or a straight sander.
600 cm ^2, preferably it may be a 20~400cm ^2. The shape may be a rectangle, a triangle, or a shape in which some or all of their sides are curved. The height of the sponge is 5 to 60 mm, preferably 10 to
It may be 40 mm.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION (A) Examples and evaluations in the case where a resin surface polishing tool for polishing a painted surface of an automobile body and a resin surface of a resin product is manually used

An example (experimental example) and a comparative example in the case where the resin surface polishing tool according to the present invention is used for a manual polishing operation of a painted surface and a resin surface will be described, and then the evaluations will be compared.

[Examples] (a) Wako Pure Chemical Industries Ltd. polypropylene glycol (triol type, molecular weight 3000) 80 g in advance, Fujimi Incorporated Silicon carbide powder (trade name "GC # 240" average) Particle size 57μm) 57
0 g, Wako Pure Chemical Industries, Ltd. dimethylamino ethanol 0.2 g, Shin-Etsu Chemical Co., Ltd. polyether modified silicone oil (trade name "KF-351") 0.5 g
And a uniform dispersion of 3 g of water and 35 g of tolylene diisocyanate manufactured by Wako Pure Chemical Industries, Ltd. with a bottom area of 24
It was placed in a cylindrical container of 3.2 cm ² and stirred to form bubbles and homogenize the liquid. As a result, the urethanization reaction proceeded, and swelling, gelation, and curing occurred, and urethane foam was obtained. It was cut into a thickness of 4.5 cm.
The sponge thus produced was allowed to stand in a constant temperature bath at 100 ° C. for 1 day, and then the weight was measured and found to be 411 g. This was heated to 700 ° C. to remove organic substances, cooled, and then weighed to find 341 g. From this, the weight percentage of silicon carbide contained in the sponge is 4 when the weight percentage of the sponge is 100 wt%.
It was 87 wt%. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since the weight of the abrasive sponge after drying was 4.5 g, the weight percentage of the dropout was 1.1 wt% when the weight percentage of the dry state of the polishing sponge before rubbing was 100 wt%.

(B) In a square columnar container having a bottom area of 289 cm ² , Poval (trade name "PVA11" manufactured by Kuraray Co., Ltd.
7 ") in a 12% aqueous solution and zirconium silicate powder (trade name" MZ-100 "manufactured by Daiichi Rare Element Chemical Industry Co., Ltd.).
0B ”average particle size of about 1.0 μm) 65 g, potato starch 100 g, Wako Pure Chemical Industries, Ltd. 37% formalin 100 g, Wako Pure Chemical Industries, Ltd. 36% hydrochloric acid 10
0 g was added. By heating it, an acetalization reaction occurred and a polyvinyl acetal sponge could be obtained. This was cut into a thickness of 7 cm, and a handle made of expanded polystyrene was bonded with a modified silicone polymer adhesive to have a height of 9.5 cm. The sponge thus prepared, which had not been bonded yet, was allowed to stand in a constant temperature bath at 100 ° C. for 1 day and then weighed to be 118 g. This was heated to 700 ° C. to remove organic substances, cooled, and then weighed to find 38 g. From this, the weight percentage of zirconium silicate contained in the sponge was 48 wt% when the weight percentage of the sponge was 100 wt%. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since the weight of the abrasive sponge after drying was 0.2 g, the weight percentage of the dropout was 0.2 wt% when the weight percentage of the dry state of the polishing sponge before hand rubbing was 100 wt%.

(C) A columnar container having a bottom area of 150 cm ^{2 and} a trapezoidal bottom, 115 g of 37% formalin manufactured by Wako Pure Chemical Industries, Ltd. and 60 g of melamine manufactured by Wako Pure Chemical Industries, Ltd. 100 g of 28% ammonia water manufactured by Kako Co., Ltd. was added to proceed the methylolation reaction. After the reaction, 40 g of water, 6 g of 88% formic acid manufactured by Wako Pure Chemical Industries, Ltd.,
Kao Corporation's sodium dodecylbenzene sulfonate (trade name "NEOPEREX No. 6") 40 g, Sumitomo 3M Ltd. hydrofluoroether (trade name "HFE7100") 45 g, Showa Denko KK cubic nitriding 750 g of boron powder (trade name “SBN-B 36-54” having an average particle size of about 45 μm) was added thereto, and the liquid was uniformly dispersed by stirring, followed by foaming and curing.
This was cut to a thickness of 0.9 cm. The sponge thus produced was allowed to stand in a constant temperature bath at 100 ° C. for 1 day and then weighed to be 53.4 g. This was heated to 700 ° C. to remove organic substances, cooled, and then weighed to find 44.6 g. From this, the weight percentage of cubic boron nitride contained in the sponge when the weight percentage of the sponge was 100 wt% was 507 w.
It was t%. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since the weight of the abrasive sponge after drying was 1.5 g, the weight percentage of the dropout was 2.8 wt% when the weight percentage of the dry state of the polishing sponge before rubbing was 100 wt%.

(D) 300 g of Sumitomo Chemical Co., Ltd. low-density polyethylene (300 g), Puremic Co., Ltd. silica powder (trade name "Silica NYS-48" average particle size of about 10 μm) 300
g and 5 g of azodicarbonamide manufactured by Wako Pure Chemical Industries, Ltd.
And Wako Pure Chemical Industries, Ltd. dicumyl peroxide 0.
It is formed by kneading 5 g and a hexagonal columnar closed container having a bottom area of 65 cm ² and thermally decomposing the foaming agent and the crosslinking agent. This was cut into a thickness of 5.1 cm. The sponge thus prepared was allowed to stand in a constant temperature bath at 100 ° C. for 1 day and then weighed to find 243 g. This was heated to 700 ° C. to remove organic substances, cooled, and then weighed to find 179 g. From this, the weight percentage of silica stone contained in the sponge was 280 wt% when the weight percentage of the sponge was 100 wt%. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since its weight after drying was 6 g, the weight percentage of the dropout was 2.5 wt% when the weight percentage of the dry state of the polishing sponge before rubbing was 100 wt%.

(E) In urethane foam (trade name "Moltoprene SC") manufactured by Inoac Corporation,
Shin-Etsu Chemical Co., Ltd. cerium oxide powder (average particle size of about 3.3 μm) and Rohm and Haas Japan Co., Ltd. acrylic emulsion (trade name “Primal L
C-40 ")) (cerium oxide weight percentage 50% in the mixture) to deposit cerium oxide. At this time, the urethane foam has a thickness of 0.8 cm,
It has a cylindrical shape with a bottom area of 64 cm ² (weight 1.45 g) and the amount of cerium oxide adhered is 100 wt% of the weight percentage of the sponge.
Was 60% in terms of weight percentage. Also,
The sponges cut to the same size were hand-rubbed 20 times in 1 liter of water, and the ones that had fallen off by that were separated by filter paper. Since the weight after drying was 0 g, the weight percentage of the dry state of the polishing sponge before rubbing by hand was 1
The weight percentage of the dropout is 0 wt%
%Met.

(F) In a columnar container having a bottom area of 55 cm ^{2 and having} an elliptical bottom surface, Poval (trade name: “P” manufactured by Kuraray Co., Ltd.
VA 117 ") 15% aqueous solution 500 g was foamed by adding 2 g of a surfactant (trade name" STAHOME F ") manufactured by NOF CORPORATION, and then diatomaceous earth powder (trade name" Radiolite "manufactured by Showa Chemical Industry Co., Ltd.). # 3000 "average particle size of about 7
4.9 μm) and 530 g, 37% manufactured by Wako Pure Chemical Industries, Ltd.
60 g of formalin and 60 g of 36% hydrochloric acid manufactured by Wako Pure Chemical Industries, Ltd. are added. By heating it, an acetalization reaction is caused, the obtained polyvinyl acetal sponge is cut into a thickness of 0.5 cm, and a handle made of expanded polystyrene is bonded with a modified silicone polymer adhesive to have a height of 1. It was 8 cm. The sponge thus prepared, which had not been bonded yet, was allowed to stand in a constant temperature bath at 100 ° C. for 1 day, and the weight was measured to be 38.9 g. This was heated to 700 ° C. to remove organic substances, cooled, and then weighed to find that it was 31.7 g. From this, the weight percentage of diatomaceous earth contained in the sponge when the weight percentage of the sponge is 100 wt% is 440 wt.
%Met. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since its weight after drying was 2.0 g, the weight percentage of the dropout was 0.5 wt% when the weight percentage of the dry state of the polishing sponge before rubbing was 100 wt%.

[Comparative Example] (g) Wako Pure Chemical Industries, Ltd. polypropylene glycol (triol type, molecular weight 3000) 80 g alumina powder (trade name “high purity / fine alumina AKP” manufactured by Sumitomo Chemical Co., Ltd.) in advance. -G008 "average particle size of about 0.
10 g (less than 1 μm), 0.2 g of dimethylaminoethanol manufactured by Wako Pure Chemical Industries, Ltd., and polyether-modified silicone oil manufactured by Shin-Etsu Chemical Co., Ltd. (trade name “KF-35”
1 ”) 0.5 g and 3 g of water were added and uniformly dispersed, and 35 g of tolylene diisocyanate manufactured by Wako Pure Chemical Industries, Ltd. was used as a bottom surface with a fan shape having a bottom area of 16.7 cm ^{2 and} a central angle of 120 °. The mixture was placed in a columnar container having it and stirred to form bubbles and homogenize the liquid. As a result, the urethanization reaction proceeded, and swelling, gelation, and curing occurred, and urethane foam was obtained. It was cut to a thickness of 0.2 cm. The sponge thus produced was allowed to stand in a constant temperature bath at 100 ° C. for 1 day and then weighed to give 0.68 g. This was heated to 700 ° C. to remove organic substances, cooled, and then weighed to give 0.04 g. From this, when the weight percentage of the sponge is 100 wt%, the weight percentage of alumina contained in the sponge is 7 w.
It was t%. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since the weight after drying was 0.02 g, when the weight percentage of the dry state of the polishing sponge before rubbing was 100 wt%,
The weight percentage of the dropout was 2.9 wt%.

(H) In an octagonal columnar container having a bottom area of 339.1 cm ² , Poval (trade name "PVA11" manufactured by Kuraray Co., Ltd.
7 ") 12% aqueous solution of 800 g and Sumitomo Chemical Co., Ltd.
Made alumina powder (trade name "coarse-grained alumina AC-21" average particle size 120 μm) 1140 g, potato starch 100 g, Wako Pure Chemical Industries, Ltd. 37% formalin 1
00 g and 100 g of 36% hydrochloric acid manufactured by Wako Pure Chemical Industries, Ltd. were added. By heating it, an acetalization reaction occurred and a polyvinyl acetal sponge could be obtained. This was cut to a thickness of 12 cm. The sponge thus produced was allowed to stand in a constant temperature bath at 100 ° C. for 1 day and then weighed to find that it was 619 g. This is 7
It was 539 g when the weight was measured after heating to 00 ° C. to remove organic substances and cooling. From this, the weight percentage of alumina contained in the sponge was 674 wt% when the weight percentage of the sponge was 100 wt%. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since the weight of the abrasive sponge after drying was 30 g, the weight percentage of the dropout was 4.8 wt% when the weight percentage of the dry state of the polishing sponge before rubbing was 100 wt%.

(I) In urethane foam (trade name "Moltoprene SC") manufactured by Inoac Corporation,
Taihei Kagaku Sangyo Co., Ltd. calcium phosphate powder (trade name "DCPD-SS" average particle size of about 16 μm) contains calcium phosphate in a dispersion (a binder component is not contained, and the weight percentage of calcium phosphate in the dispersion is 50 wt%). No The urethane foam at this time was a square column (weight 5.67 g) having a thickness of 2.5 cm and a bottom area of 80 cm ² , and the amount of calcium phosphate deposited was 60 wt% when the sponge weight percentage was 100 wt%. %Met. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since the weight of the dried sponge was 0.9 g, the weight percentage of the removed portion was 10 wt% when the dry weight of the polishing sponge before rubbing was 100 wt%.

(J) Thickness 3.0 cm, bottom area 78.5 cm
^{In 2} , a cylindrical urethane foam (trade name “Moltoprene SC”) manufactured by Inoac Corporation was used as a sponge containing no abrasive particles.

(K) "Soft 99999 Kobo Liquid Compound # 3000" commercially available from Soft99 Corporation was used with the same sponge as in (j).

The tests were carried out using the sponges of (a) to (k) and the combination of sponge and compound, using the bonnet part of a 1999 Toyota Corolla white paint vehicle.

This car has not been car-washed or waxed from one month before the test evaluation date in advance,
It is a car that has been left alone.

Small stones, sand and the like in the bonnet portion of this car were removed with tap water, and the bonnet portion was pinched with masking tape so as to form approximately correct squares and divided into 12 parts.

On each surface, use sponges (a) to (k),
Each work range was worked for 1 minute (polishing). The other one was left blank without any treatment.

After completion of the polishing operation, the cloth was lightly wiped with a towel at 12 places, and the dropout and remaining condition of the abrasive particles were observed.

As the evaluation, the workability of the polishing work, the degree of dirt removal and scratches, and the degree of remaining of the polishing particles on the coated surface were visually evaluated on the basis of the following conditions in four levels. In addition, the degree of polishing was confirmed as compared with the blank so as to remove stains.

Polishing workability ◎: Smooth and light use and easy to use. ○: Can be used almost smoothly and lightly. Δ: It is heavy and difficult to work, or it is difficult to use. X: Very heavy and unusable or unusable. Polishing degree (condition of stain removal) ⊚: The stain was completely removed (80% or more of the whole). ◯: Almost all stains were removed, but the paint surface was scratched. B: Almost no stain is removed (about 50% of the whole). X: Dirt did not come off at all or many large scratches were formed. Absence of abrasive particles ◎: No omission. ○: There is a dropout. Δ: There is a dropout. X: A large amount was dropped off.

[Evaluation]

[Table 1]

From Table 1, when using the sponges (a) to (f), the workability, the polishing performance, and the removal of abrasive particles are all the best evaluations. That is, the workability was smoothly and lightly used and easy to use, the polishing performance was completely clean (80% or more of the total), and the removal of polishing particles was evaluated as no removal.

On the other hand, with respect to the sponge (g), although the best evaluation was obtained with respect to workability and removal of abrasive particles, there was a defect that dirt was hardly removed because the particles were fine. For sponge (k),
Although the best evaluation of the polishing performance of the coated surface was obtained, the workability was poorly evaluated, and there was a problem that the particles of the used chemical solution remained, although there was no loss of abrasive particles on the coated surface. . Other sponge (h)
Regarding (j), the best evaluations were not obtained for workability, polishing performance, and removal of abrasive particles.

(B) Examples and evaluation of resin surface polishing tools for buffing painted surfaces of automobile bodies and resin surface buffs of resin products

Examples (experimental examples) and comparative examples in which the resin surface polishing tool according to the present invention was used for buffing work (painting surface and resin surface) (working with a rotary machine) were described, and then their evaluations were carried out. To contrast.

[Examples] (a) In 80 g of polypropylene glycol (triol type, molecular weight 3000) manufactured by Wako Pure Chemical Industries, Ltd., silicon carbide powder manufactured by Fujimi Incorporated (trade name "GC # 240" average Particle size 57μm) 57
0 g, Wako Pure Chemical Industries, Ltd. dimethylamino ethanol 0.2 g, Shin-Etsu Chemical Co., Ltd. polyether modified silicone oil (trade name "KF-351") 0.5 g
And a uniform dispersion of 3 g of water and 35 g of tolylene diisocyanate manufactured by Wako Pure Chemical Industries, Ltd. with a diameter of 150
The mixture was placed in a cylindrical mm-shaped container and stirred to form bubbles and homogenize the liquid. As a result, the urethanization reaction proceeded, and swelling, gelation, and curing occurred, and urethane foam was obtained. Cut it to a thickness of 58 mm and attach it to a hook-and-loop fastener ("Nylon pile B" manufactured by Sunhit Co., Ltd.).
The surface ") was adhered with a modified silicone polymer adhesive. Its height was 60 mm. The sponge before bonding the thus-prepared surface fastener was left in a thermostatic chamber at 100 ° C for 1 day, and then the weight was measured.
It was 90 g. This was heated to 700 ° C. to remove organic substances, cooled, and then weighed to find 322 g. From this, the weight percentage of the sponge is 100 wt.
The percentage by weight of silicon carbide contained in the sponge was 474 wt% when expressed as%. Also, sponge cut into the same size is rubbed 20 times in 1 liter of water,
What was dropped by this was separated by filter paper. Since the weight of the abrasive sponge after drying was 4.0 g, the weight percentage of the dropout was 1.0 wt% when the weight percentage of the dry state of the polishing sponge before hand rubbing was 100 wt%. The obtained sponge was set in "Electronic Polisher PV7001C (pad diameter 150 mm)" manufactured by Makita Co., Ltd. and used. At this time, the diameter of the sponge / the diameter of the pad = 1.0.

(B) In a cylindrical container having a diameter of 140 mm,
800g of a 12% aqueous solution of Poval (trade name "PVA117") manufactured by Kuraray Co., Ltd., and 65 g of zirconium silicate powder (trade name "MZ-1000B" average particle size of about 1.0 μm) manufactured by Daiichi Rare Element Chemical Industry Co., Ltd. And potato starch 1
00g and Wako Pure Chemical Industries, Ltd. 37% formalin 10
0 g and 100 g of 36% hydrochloric acid manufactured by Wako Pure Chemical Industries, Ltd. were added. By heating it, an acetalization reaction was caused to obtain a polyvinyl acetal sponge. This was cut to a thickness of 28 mm, and a surface fastener (“Nylon pile B side” manufactured by Sunhit Co., Ltd.) was adhered thereto with a modified silicone polymer adhesive. Its height became 30 mm. The sponge before bonding the thus-prepared surface fastener was left for 1 day in a thermostatic chamber at 100 ° C., and then the weight was measured and found to be 81 g. 70 this
It was 26 g when the weight was measured after heating to 0 ° C. to remove organic substances and cooling. From this, the weight percentage of zirconium silicate contained in the sponge was 47 wt% when the weight percentage of the sponge was 100 wt%. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Weight after drying it is 0.3g
Therefore, when the weight percentage of the dry state of the polishing sponge before rubbing was 100 wt%, the weight percentage of the dropout was 0.4 wt%. The sponge obtained is "Toshiba Random Sander HRS" manufactured by Shibaura Manufacturing Co., Ltd.
-125A (pad diameter 125 mm) "was used. At this time, sponge diameter / pad diameter = 1.1
It was 2.

(C) 37% formalin 2 manufactured by Wako Pure Chemical Industries, Ltd. in a container having a rectangular bottom of 100 × 400 mm.
30 g and 120 g of melamine manufactured by Wako Pure Chemical Industries, Ltd. were put, and 200 g of 28% ammonia water manufactured by Taisei Kako Co., Ltd. was added to proceed the methylolation reaction. After the reaction was completed, 80 g of water and 88% formic acid 12 manufactured by Wako Pure Chemical Industries, Ltd.
g, 80 g of sodium dodecylbenzene sulfonate (trade name "NeoPerex No. 6") manufactured by Kao Corporation, 90 g of hydrofluoroether (trade name "HFE7100") manufactured by Sumitomo 3M Limited, cubic by Showa Denko KK 1500 g of crystalline boron nitride powder (trade name “SBN-B 36-54”, average particle diameter of about 45 μm) was added, and the solution was uniformly dispersed by stirring, followed by foaming and curing to obtain. This was cut to a thickness of 18 mm, and a surface fastener (“Nylon pile B side” manufactured by Sunhit Co., Ltd.) was adhered to this with a modified silicone polymer adhesive. Its height became 20 mm. The sponge before bonding the thus-prepared surface fastener was left in a constant temperature bath at 100 ° C. for 1 day, and then the weight was measured and found to be 298 g. This is 7
It was 250 g when the weight was measured after heating to 00 ° C. to remove organic substances and cooling. From this, the weight percentage of cubic boron nitride contained in the sponge is 521 wt% when the weight percentage of the sponge is 100 wt%.
Met. Also, 1 sponge cut to the same size
It was rubbed by hand 20 times in liter of water, and what was dropped off was collected by a filter paper. Its dry weight is 8.
Since the amount was 0 g, the weight percentage of the dropout was 2.7 wt% when the weight percentage of the dry state of the polishing sponge before hand-rubbing was 100 wt%. The obtained sponge was set in “Orbital Sander 820A4D (pad area 93 × 400 mm)” manufactured by Compact Tool Co., Ltd. and used.

(D) 300 g of Sumitomo Chemical Co., Ltd. low-density polyethylene (300 g) manufactured by Puremic Co., Ltd. (trade name “Silica NYS-48”, average particle size: about 10 μm)
g and 5 g of azodicarbonamide manufactured by Wako Pure Chemical Industries, Ltd.
And Wako Pure Chemical Industries, Ltd. dicumyl peroxide 0.
It was formed by kneading 5 g with a columnar closed container having an equilateral triangle with a side of 94 mm on the bottom and pyrolyzing the foaming agent and the crosslinking agent. This was cut to a thickness of 0.8 cm, and a surface fastener (“Nylon pile B side” manufactured by Sunhit Co., Ltd.) was adhered to this with a modified silicone polymer adhesive. Its height was 10 mm. The sponge before bonding the resulting surface fastener is 100 ℃
After leaving it in the constant temperature bath for 1 day, the weight was measured and found to be 22 g. This was heated to 700 ° C. to remove organic substances, cooled, and then weighed to find 16 g. From this, the weight percentage of the sponge is 100 wt.
The weight percentage of silica stone contained in the sponge was 267 wt% when the percentage was expressed as%. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since its weight after drying was 0.5 g, the weight percentage of the dropout was 2.7 wt% when the weight percentage of the dry state of the polishing sponge before rubbing was 100 wt%.
The obtained sponge was set in "Dell Thunder PDA120E (pad side length 94 mm)" manufactured by Bosch Corp. and used.

(E) In urethane foam (trade name "Moltoprene SC") manufactured by Inoac Corporation,
Shin-Etsu Chemical Co., Ltd. cerium oxide powder (average particle size of about 3.3 μm) and Rohm and Haas Japan Co., Ltd. acrylic emulsion (trade name “Primal L
C-40 ")) (cerium oxide weight percentage 50% in the mixture) to deposit cerium oxide. At this time, the urethane foam had a columnar shape (weight 79 g) having a thickness of 73 mm and a bottom surface diameter of 220 mm, and the adhered amount of cerium oxide was 59% when the weight percentage of the sponge was 100 wt%. In addition to this, hook-and-loop fasteners (“Nylon pile B” manufactured by Sunhit Co., Ltd.)
The surface ") was adhered with a modified silicone polymer adhesive. Its height became 75 mm. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since the weight of the abrasive sponge after drying was 0 g, the weight percentage of the dropout was 0 wt% when the dry weight of the polishing sponge before rubbing was 100% by weight. The obtained sponge is "Polisher S" manufactured by Shinano Seisakusho.
I-2400 ((pad diameter 180 mm) ”was used. At this time, sponge diameter / pad diameter =
It was 1.22.

(F) In a columnar container having a 90 × 180 mm rectangular bottom, a Poval (trade name: “P” manufactured by Kuraray Co., Ltd.
VA117 ") 15% aqueous solution 1500 g was foamed by adding 6 g of a surfactant (trade name" STAHOME F ") manufactured by NOF CORPORATION, and then diatomaceous earth powder (trade name" Radiolite "manufactured by Showa Chemical Industry Co., Ltd.). # 3000 "average particle size of about 7
4.9 μm) 1590 g and 37 manufactured by Wako Pure Chemical Industries, Ltd.
% Formalin 180g and 36% made by Wako Pure Chemical Industries, Ltd.
180 g of hydrochloric acid was added. The polyvinyl acetal sponge was cut to a thickness of 38 mm by heating it to cause an acetalization reaction, and a surface fastener (“Nylon pile B side” manufactured by Sunhit Co., Ltd.) was modified with a silicone polymer adhesive. Bonded with the agent. Its height was 40 mm. The sponge thus prepared, which had not been bonded to the surface fastener, was allowed to stand in a constant temperature bath at 100 ° C. for 1 day, and the weight was measured and found to be 253 g. This was heated to 700 ° C. to remove organic substances, cooled, and then weighed to find 208 g. From this, the weight percentage of diatomaceous earth contained in the sponge when the weight percentage of the sponge is 100 wt% is 462 w.
It was t%. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since the weight of the abrasive sponge after drying was 1 g, the weight percentage of the dropout was 0.4 wt% when the weight percentage of the dry state of the polishing sponge before rubbing was 100 wt%. The sponge obtained is "Hatchins Mini Straight Thunder 200
0-MOM (pad area 86 × 178 mm) ”.

[Comparative Example] (g) In 320 g of polypropylene glycol (triol type, molecular weight 3000) manufactured by Wako Pure Chemical Industries, Ltd., an alumina powder manufactured by Sumitomo Chemical Co., Ltd. (trade name “high purity / fine alumina AKP”) was previously prepared. -G008 "average particle size less than about 0.1 μm) 40 g, Wako Pure Chemical Industries, Ltd. dimethylaminoethanol 0.8 g, and Shin-Etsu Chemical Co., Ltd.
Polyether-modified silicone oil (trade name "KF-
351 "), 2.0 g and 12 g of water are added and uniformly dispersed, and 140 g of tolylene diisocyanate manufactured by Wako Pure Chemical Industries, Ltd. are placed in a columnar container having a rectangular bottom of 70 × 90 mm and stirred. The bubbles were formed and the liquid was homogenized. As a result, the urethane reaction proceeds and the
Gelling and curing occur, and urethane foam is obtained. It was cut to a thickness of 2 mm, and a surface fastener (“Nylon pile B side” manufactured by Sunhit Co., Ltd.) was adhered thereto with a modified silicone polymer adhesive. Its height was 4 mm. The sponge before bonding the thus-prepared surface fastener was left in a constant temperature bath at 100 ° C. for 1 day and then weighed to find that it was 3.6 g.
This was heated to 700 ° C. to remove organic substances, cooled, and then weighed to find 0.3 g. From this, the weight percentage of alumina contained in the sponge is 9 wt% when the weight percentage of the sponge is 100 wt%.
Met. Also, 1 sponge cut to the same size
It was rubbed by hand 20 times in liter of water, and what was dropped off was collected by a filter paper. It has a dry weight of 0.
Since the amount was 1 g, the weight percentage of the dropout was 2.7 wt% when the weight percentage of the dry state of the polishing sponge before hand-rubbing was 100 wt%. The obtained sponge was set in “Orbital Sander 873B-L (pad area 73 × 98 mm)” manufactured by Compact Tool Co., Ltd. and used.

(H) In a cylindrical container having a diameter of 190 mm,
Kuraray Co., Ltd.'s Poval (trade name "PVA117") 12% aqueous solution 1600 g, Sumitomo Chemical Co., Ltd.'s alumina powder (trade name "Coarse-grained alumina AC-21" average particle size 120 μm) 2280 g, and potato starch 200
g and Wako Pure Chemical Industries, Ltd. 37% formalin 200g
And 200 g of 36% hydrochloric acid manufactured by Wako Pure Chemical Industries, Ltd. were added. By heating it, an acetalization reaction occurs,
A polyvinyl acetal sponge could be obtained. This was cut into a thickness of 120 mm, and a surface fastener (“Nylon pile B side” manufactured by Sunhit Co., Ltd.) was adhered to this with a modified silicone polymer adhesive. Its height was 122 mm. Place the sponge before bonding the resulting surface fastener in a 100 ° C constant temperature bath.
After standing for one day, the weight was measured and found to be 1986 g. This was heated to 700 ° C. to remove organic substances, cooled, and then weighed to be 1728 g. From this, the weight percentage of alumina contained in the sponge is 6 when the weight percentage of the sponge is 100 wt%.
It was 69 wt%. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since its weight after drying was 93 g, the weight percentage of the dropout was 4.7 wt% when the weight percentage of the dry state of the polishing sponge before rubbing was 100 wt%. The obtained sponge was set in "Electric Polisher C-180 (pad diameter 123 mm)" manufactured by Compact Tool Co., Ltd. and used. At this time, the diameter of the sponge / the diameter of the pad = 1.54.

(I) In urethane foam (trade name "Moltoprene SC") manufactured by Inoac Corporation,
Taihei Kagaku Sangyo Co., Ltd. calcium phosphate powder (trade name "DCPD-SS" average particle size of about 16 μm) contains calcium phosphate in a dispersion (a binder component is not contained, and the weight percentage of calcium phosphate in the dispersion is 50 wt%). No At this time, the urethane foam has a cylindrical shape with a thickness of 33 mm and a bottom diameter of 150 mm (weight 1
The amount of calcium phosphate adhered was 60 wt% in terms of weight percentage when the weight percentage of the sponge was 100 wt%. A surface fastener (“Nylon pile B side” manufactured by Sunhit Co., Ltd.) was adhered thereto with a modified silicone polymer adhesive. Its height was 35 mm. Further, a sponge cut into the same size was rubbed by hand 20 times in 1 liter of water, and the one dropped off was separated by a filter paper. Since the weight of the abrasive sponge after drying was 2.7 g, the weight percentage of the dropout was 10 wt% when the dry weight of the polishing sponge before rubbing was 100 wt%. The obtained sponge is "Random Thunder RS-1" manufactured by Ryobi Co., Ltd.
15 (pad diameter 110 mm) ".
At this time, the diameter of the sponge / the diameter of the pad = 1.36.

(J) A cylindrical urethane foam (trade name “Moltoprene SC”) manufactured by Inoac Corporation having a thickness of 30 mm and a diameter of 170 mm was used as a sponge containing no abrasive particles, and a surface fastener ((trade name)) was used. "Nylon pile B side" manufactured by Sunhit) was adhered with a modified silicone polymer adhesive. Its height was 3.2 cm. The obtained sponge was set in "Electronic Polisher PV7001C (pad diameter 150 mm)" manufactured by Makita Co., Ltd. and used. At this time, the diameter of the sponge / the diameter of the pad = 1.13.

(K) "Soft 99999 Kobo Liquid Compound # 3000" commercially available from Soft99 Corporation was used with the same sponge and the same machine as (j).

[Evaluation Method] The test is performed using the sponge of (a) to (k) and the combination of the sponge and the compound, using the hood, trunk, and ceiling of the 1999 Nissan Cedric white-painted car. It was

This car has not been car-washed or waxed from one month before the test evaluation date in advance,
It is a car that has been left alone.

The bonnet, trunk, and pebbles on the ceiling, sand, etc. of this car were removed with tap water so that two or more bonnets and 6 ceilings were placed on the hood so that the cells would be approximately accurate. It was divided with a masking tape so that there would be 4 places, and it was divided into 12 places.

Using the sponges (a) to (k) on each surface, buffing was performed for 1 minute (polishing) in each work range. The other one was left blank without any treatment.

After completion of the polishing operation, the appearance of scratches on the coating surface within each range and the degree of remaining of the polishing particles on the coating surface were visually evaluated on the basis of the following conditions (evaluation method) at four levels.
In addition, the degree of polishing was confirmed as compared with the blank so as to remove stains.

Polishing workability ◎: Smooth and light use, and easy to use. ○: Can be used almost smoothly and lightly. Δ: It is heavy and difficult to work, or it is difficult to use. X: Very heavy and unusable or unusable. Polishing degree (condition of stain removal) ⊚: The stain was completely removed (80% or more of the whole). ◯: Almost all stains were removed, but the paint surface was scratched. B: Almost no stain is removed (about 50% of the whole). X: Dirt did not come off at all or many large scratches were formed. Absence of abrasive particles ◎: No omission. ○: There is a dropout. Δ: There is a dropout. X: A large amount was dropped off.

[Evaluation]

[Table 2]

From Table 2, when using the sponges (a) to (f), the workability, the polishing performance, and the removal of abrasive particles are all the best evaluations. That is, the workability was smoothly and lightly used and easy to use, the polishing performance was completely clean (80% or more of the total), and the removal of polishing particles was evaluated as no removal.

On the other hand, with respect to the sponge (g), although the best evaluation was obtained with respect to workability and removal of abrasive particles, there was a defect that almost no dirt was removed because the particles were fine. For sponge (k),
Although the best evaluation of the polishing performance was obtained, the workability was poorly evaluated, and there was a problem that the particles of the used chemical solution remained although the removal of the polishing particles did not occur. Regarding the other sponges (h) to (j), the best evaluations regarding workability, polishing performance, and removal of abrasive particles were not obtained.

[0064]

As described above, when the painted surface of the vehicle body or the resin surface of the resin product is ground by using the resin surface polishing tool according to the present invention, the "clogging", "continuous use", and "scattering prevention" All the conventional problems are solved.

In addition to the painted surface of the vehicle body, the resin surface polishing tool according to the present invention can be used for resin bathtubs and bathroom walls of integrated system baths, resin washbasins, buckets, planters, skis, etc. Examples include resin surfaces for home appliances such as TVs, refrigerators, rice cookers, and washing machines, resin road sound barriers, and resin signboards.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yuichiro Okada             2-6-5 Tanimachi, Chuo-ku, Osaka-shi, Osaka Prefecture             Inside Soft Kyukyu Corporation (72) Inventor Ryutaro Hidaka             2-6-5 Tanimachi, Chuo-ku, Osaka-shi, Osaka Prefecture             Inside Soft Kyukyu Corporation (72) Inventor Takuya Okahata             12 Kitatone, Sowa-machi, Sarushima-gun, Ibaraki             Kanto factory (72) Inventor Minoru Tomasasa             12 Kitatone, Sowa-machi, Sarushima-gun, Ibaraki             Kanto factory F term (reference) 3C058 AA06 AA09 CB04 CB05 DA02                 3C063 AA10 BB07 BC03 BG01 BG22                       EE26 EE28 FF22 FF23                 3D026 AA02 AA15 AA32 AA38 AA62                       AA64

Claims (2)

[Claims] 1. A resin surface polishing tool in which abrasive particles are fixed to a main material made of a sponge having a water absorbing / water retaining ability, and a lost article after being rubbed 20 times in water before being immersed in water. Weight percentage of main material is 3.0 wt%
The primary average particle diameter of the abrasive particles is 0.2 to 80 μm, and the weight percentage of the abrasive particle content is 10 to 600 wt when the weight percentage of components other than the abrasive particles is 100 wt%.
%, A resin surface polishing tool. 2. The weight percentage of the fallen substance after hand-rubbing 20 times in water with respect to the main material before immersion in water is 2.0 wt% or less, and the average primary particle diameter of the abrasive particles is 1 to 60 μm. The resin surface polishing tool according to claim 1, wherein the weight percentage of the content of the polishing particles is 40 to 500 wt% when the weight percentage of the components other than the polishing particles is 100 wt%.