KR20090019293A - Foaming abrasive material and method of manufacturing - Google Patents

Abstract

A foaming abrasive product and a manufacturing method thereof are provided to improve the polishing capacity and the grinding lifetime by applying the dust preventing coating on the top of the coating layer, and to improve workability by adhering to the absorption member to the upper side of the thin resin layer with the adhesive force of the foaming resin. A foaming abrasive product includes the size coat(31), the abrasive(20), the make coat(30) and material. As the material, the foaming additive is mixed in the foaming resin, foaming ingredient(41) is concentrated on one side and the general resin is formed in the dissimilar side into the distributed asymmetry foaming resin(42), in the absorption member(50) is the asymmetry foaming resin, it is adhered to one side in which the foaming ingredient is concentrated, and laminated to successively in the dissimilar side in which the production adhesive, abrasive, and the size coat are distributed in the general resin. The dust preventing coating(32) is added on the top of the size coat.

Description

Foamed abrasive product and its manufacturing method {Foaming Abrasive Material and Method of Manufacturing}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abrasive product, and in particular, a backing material constituting the abrasive product is formed of a thin asymmetry foaming resin to give flexibility and elasticity to an existing abrasive product, and to grind the groove of the workpiece. And a foamed abrasive product and a method for manufacturing the same, which exhibit excellent performance in polishing performance and workability in grinding a curved abrasive surface, and surface roughness of a workpiece.

In addition, the smoothness of the abrasive attachment surface is improved by the base layer of the asymmetric foaming resin formed by the movement of the foaming component, thereby increasing the engagement of the abrasive, and applying the anti-dust coating to the foamed abrasive product. The present invention relates to a foamed abrasive product and a method of manufacturing the same which minimize dust trapping.

Typical abrasive products are backing material 10, abrasive 20, as shown in FIG. Consists of three elements: Make Coat (30) and Size Coat (31).

At this time, the substrate is a paper, a woven fabric using a variety of fibers, bulky fiber (Vulcanized fiber), film (Film), non-woven fabrics, and the like, the adhesive may be used both thermosetting adhesives and thermoplastic adhesives, abrasives of the product Depending on the application, various kinds of abrasive materials are used. The abrasive product may be manufactured in various forms, such as a sheet, a belt, a disc, and a wheel, depending on the use.

However, such conventional abrasive products have low flexibility of the substrate when used in the form of curved polishing surface polishing and groove polishing, so that the polishing workability, polishing performance and roughness of the workpiece under the curved polishing surface polishing and groove polishing working conditions are weak. There is a problem that the workability of the worker is significantly reduced.

On the other hand, to improve the above problems various research and development has been carried out for the improved substrate material.

First, as shown in FIG. 2A, US Patent No. 6,183,677 (Method of manufacturing abrasive sheet with thin resin film) uses the resin film 11 as a base material to form the abrasive particles 20 by the adhesive 12. By attaching a rigid releaseable film 13 to the back of the resin film 11 to form the surface layer 14 between the adhesive 12 and the stiff resin layer 13. The manufacturing process is inefficient and the production cost is high, there is a problem that the flexibility and elasticity of the product is lowered by the adhesive 12 and the surface layer (14).

In addition, as shown in Figure 2b, US Patent No. 6,406,504 (Resilient abrasive article with hard anti-loading size coating) is an abrasive (Abrasive) 20. Composed of a size coat (31), a thick coat (Make Coat) 30 and an elonggate substrate 15, due to the thickness of the production adhesive 30 and the extensible substrate 15 The flexibility of the product is lowered and the smoothness of the abrasive surface is lowered due to the foaming component exposed to the first surface 16. In particular, in the use of a small particle size abrasive, there is a problem in that the abrasive participation of the abrasive is reduced, and the surface roughness of the workpiece is also reduced.

The present invention has been made to solve the above problems, to form asymmetric foaming resin (Foaming Resin) by adding a foam component to a thin resin (Resin) layer, and applying it to the backing (flexibility) and polishing It is an object of the present invention to provide a foamed abrasive product and a method of manufacturing the same, which improves the performance and improves the polishing performance and the dust freeze by applying the anti-dust free coating on the upper side of the coating layer.

In addition, the present invention provides a foamed abrasive product and a method of manufacturing the same by which the manufacturing process is easy by attaching a Nylex fabric to the upper surface of the thin resin layer without the use of a separate adhesive by the adhesive force of the foamed resin itself. There is a purpose.

In addition, since the foaming component is not distributed on the lower surface of the thin resin layer, the present invention maintains high smoothness of the abrasive surface to improve the abrasive participation rate, abrasive performance, and roughness of the workpiece, and to smooth the curved surface due to the flexibility of the substrate. Another object is to provide a foamed abrasive product and a method for manufacturing the same, which enable groove polishing.

Foamed abrasive product according to the present invention is an abrasive product comprising a coating adhesive, an abrasive, a production adhesive, a base material, the base material is a foaming resin is mixed with the foamed resin, the foam component is concentrated on one side and the other side is a general resin The asymmetric foaming resin is distributed, but the adsorption member is attached to one side of the foam component concentrated in the asymmetrical foaming resin, the production adhesive, abrasive, coating adhesive is sequentially laminated on the other side of the general resin distribution, the coating adhesive At the top of the back is added a dust free coating.

In addition, the method for producing a foamed abrasive product according to the present invention includes a mixing step of adding a foaming additive to the foamed resin and stirring and mixing at room temperature; A foam base forming step of applying a foamed resin to which a foaming additive is added to a release paper having a mold release effect to a predetermined thickness; A foaming component transfer step of forming an asymmetrical foaming resin by moving the foaming component generated by the foaming additive upward by a aging process at a predetermined temperature in a drying furnace; Adsorbing member adhering process for adhering the adsorbing member to the upper side of the asymmetric foaming resin in which the foaming component is concentrated; The release paper is removed, and then the production adhesive, abrasive, and coating adhesive are sequentially applied to the removed surface, and the abrasive is applied to the abrasive coating step of applying an anti-dust coating on top of the coating adhesive.

The foamed abrasive product according to the present invention forms an asymmetry foaming resin (42) by adding a foaming component to a thin resin (Resin) layer, and applies it to a backing to provide flexibility and polishing roughness. In addition, by applying the anti-dust coating on the upper side of the coating layer, there is an effect of improving the polishing performance and the grinding life.

In addition, the present invention improves workability by attaching the adsorption member 50 made of Nylex cloth or the like by the adhesive force of the foamable resin 40 itself, without using a separate adhesive on the upper surface of the thin resin layer, There is an effect that the manufacturing process is easy.

In addition, since the foaming component is not distributed on the lower surface of the thin resin layer, the present invention maintains high smoothness of the abrasive surface to improve the grinding participation rate and polishing performance of the abrasive, and is excellent in curved surfaces and grooves of the workpiece due to the flexibility of the substrate. Grinding force and abrasive roughness are effective.

The foamed abrasive product according to the present invention improves the conventional abrasive product including a coating adhesive, an abrasive, a production adhesive, and a base material, and the foaming component is concentrated on one side to which the adsorption member is bonded, and the other side of the general resin having no foaming component distributed. Its technical features are in constructing the substrate with an asymmetric foamed resin that forms a shape.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a cross-sectional view of the foamed abrasive product according to the present invention, Figure 4 is a schematic diagram for each process for the production of foamed abrasive product according to the present invention.

As shown in FIG. 3, the foamed abrasive product according to the present invention includes a coating adhesive 31, an abrasive 20, a production adhesive 30, and a rear surface of the production adhesive 30, like a conventional abrasive product. Instead of the conventional fabric or film as the substrate 10 to be bonded to the foamed resin 40 was applied.

In particular, by adding a foaming additive (described later) to the foamable resin 40 and aged for a predetermined time, the foaming component 41 is concentrated on one side, and the other side is based on the asymmetric foaming resin 42 which is distributed only in general resin. It is used to form a base layer having excellent physical properties that solve the problems of conventional abrasive products.

In addition, on the upper side of the coating adhesive 31 applied to the abrasive 20 to prevent dust (polishing residue generated from the workpiece) between the abrasive components constituting the abrasive 20 during the polishing operation, the polishing performance is reduced. The anti-dust coating 32 is again added for this purpose.

The foamed resin 40 is a one-component or two-component resin having flexibility and elasticity, phenol resin, melamine resin, urethane resin, epoxy resin, alkyd resin, vinyl acetate resin, acrylic emulsion resin, latex, modified urethane, rubber , UV (UV) resin, or a mixture thereof.

At this time, the foamed resin 40 generates a foaming component 41 having a low specific gravity, and a foaming additive is added to move the generated foaming component upwards within a predetermined time, and thus the asymmetric foaming resin 42 of the present invention. Will form.

The foaming additive is Azodicarbonamide (ADCA, AC), P, P'-Oxy bis (benzene sulfonyl hydrazide) (OBSH), N, N'-Dinitroso pentamethylene tetramine (DPT), P-Toluene sulfonyl hydrazide (TSH), P- Chemical foaming agents, including toluenesulfonyl semicarbazide (PTSS); Among the physical foaming agents including CO 2, N 2, Freon, EPS, MS is used selectively depending on the environment and production cost, etc. In the present invention, the experiment was performed using an expansion-type foaming additive in the physical foaming agent.

The foamed resin 40 and the foaming additives are stirred and mixed at room temperature for a predetermined time, wherein the foaming additives maintain the weight ratio in an appropriate amount according to the foaming form desired by the user.

On the other hand, the foamed resin 40 to which the foaming additive is added is applied to the release paper 60 to a certain thickness, specific gravity by aging for a predetermined time (1 to 10 minutes) in a drying furnace of a predetermined temperature (80 ~ 200 ℃) Since the low foaming component 41 is moved upward, one side (upper surface) forms an asymmetric foaming resin 42 in which the foaming component is concentrated and the other side (lower surface) has only a resin component.

At this time, the surface of the concentrated foam component has its own adhesive strength by the characteristics of the resin, so after combining the adsorption member 50 in the state without using a separate adhesive, and then reversed again to remove the release paper 60, the resin On the surface where the components are concentrated, the production adhesive 30, the abrasive 20, and the coating adhesive 31 are sequentially applied.

In the present invention, as an embodiment of the adsorption member 50, a nylon x cloth was used, and synthetic fibers such as nylon and cotton, which are used in various industries such as clothing and packaging industries, and natural fibers such as cotton.

In addition, since the Narex for the adsorption power is different depending on the raising, it is preferable to adjust the height and density of the raising according to the purpose or environment of use, and adsorption function such as cotton or synthetic resin according to the user's use environment and purpose. Of course, any material with this can be used.

The coating adhesive 31 may be any one or a mixture of phenol resin, melamine resin, urethane resin, epoxy resin, alkyd resin, vinyl acetate resin, acrylic emulsion resin, latex, modified urethane, rubber, UV resin, and UV resin. It is composed.

In addition, the anti-dust coating 32 is further mixed with a surfactant in the components of the coating adhesive 31, to prevent dust from adhering to the surface of the coating adhesive (31).

In order to specifically compare the performance of the foamed abrasive article according to the present invention and the conventional abrasive article, the applicant has performed a surface roughness (abrasion roughness of the workpiece) under the same conditions as follows.

[test equipment]-Illuminance: TOKYO SEIMITSU E-30A

[Polishing condition]

(1) Particle size: P600 (25.8㎛) (2) Specification of abrasive product: 115 × 140mm

(3) Grinding object: SUS304 (bent part) (4) Polishing load: 3kgf

(5) Polishing time: 10s (6) Pad used a sponge.

(7) dry polishing method

Measurement of the roughness of the workpiece can be different depending on the measurement method and the polishing conditions, the polishing method for roughness measurement in the present invention after polishing the workpiece after 10s polishing the abrasive product with a load of 3kgf at the curved portion of SUS304 The roughness of the surface was measured.

[test result]

1) Conventional Abrasive Products

Ra = 0.54 µm Rmax = 6.88 µm

Rz = 5.50 µm Rt = 5.65 µm

2) Abrasive Product of the Present Invention

Ra = 0.45 µm Rmax = 4.32 µm

Rz = 3.95 µm Rt = 4.29 µm

As shown above, it can be seen that the foamed abrasive product according to the present invention is remarkably improved in the roughness of the workpiece compared to a product using a general flexible woven substrate and a film.

In addition, in the abrasive product in which the anti-dust coating 32 is applied to the foamed abrasive product according to the present invention, the roughness of the workpiece and the grinding life of the abrasive product are further improved in the curved area polishing. It was confirmed that the polishing performance is improved. Of course, even when the abrasive particles were repeated in the same experiment with different P400 (35.0 µm) and P360 (40.5 µm), the polishing roughness was similarly improved.

Foamed abrasive article of the present invention as described above is prepared by the following sequential process as shown in FIG.

First step (mixing step): A foaming additive is added to the foamed resin 40 and stirred and mixed at room temperature.

2nd process (foam base formation process): The foamed resin 40 which foaming additive was added to the release paper 60 which shows a mold release effect is apply | coated to predetermined thickness.

Third step (foaming component moving step): asymmetrical by moving upwardly the foaming component 41 generated by the foaming additive by a aging process for a predetermined time (1-10 minutes) in a drying furnace at a predetermined temperature (80-200 ° C). Foamed resin 42 is formed.

4th process (adsorption | suction member adhesion process): The adsorption member 50 is adhere | attached on the upper side of the asymmetric foamed resin 42.

5th process (grinding material attachment process): The release paper 60 is removed, the production adhesive 30, the abrasive 20, and the coating adhesive 31 are sequentially apply | coated to the removed surface, and the coating adhesive 31 of Apply dust-free coating 32 on the upper layer.

On the other hand, the abrasive 20 used in the present invention is aluminum oxide, silicon carbide, zirconia alumina oxide, ceramic, garnet, artificial diamond, flint, diamond, crocus, granular, etc. are used alone or mixed with the abrasive. . The use of such abrasives differs depending on the type of abrasive, the amount of polishing and the roughness.

In addition, the adhesives 30 and 31 are applied to the front surface of the asymmetric foamable resin 42-the surface to which the abrasive is attached, and the production adhesive 30 which primarily fixes the abrasive 20, and the abrasive ( 20) It is divided into a coating adhesive 31 which is applied on the top to improve the polishing force and improve the polishing duration by adding the polishing aid, in the present invention, the dust of the workpiece to prevent the dust between the abrasive to improve the grinding force An anti-jamming coating 32 is added.

As mentioned above, although this invention was demonstrated by the Example, the protection scope of this invention is not limited to this, It will be said that it applies to all the examples to which the technical idea equivalent to the matter described in the claim was applied.

1 is a cross-sectional view of a conventional abrasive product,

Figure 2a is a cross-sectional view of the prior known product 1,

Figure 2b is a cross-sectional view of the prior known product 2,

3 is a cross-sectional view of the foamed abrasive product according to the present invention;

Figure 4 is a schematic diagram according to the process for the production of foamed abrasive products according to the present invention.

<Brief description of symbols for the main parts of the drawings>

10: base material 11: resin film

12: pressure-sensitive adhesive 13: stiff resin layer

14 surface layer 15 extendable substrate

16: first surface

20: abrasive 30: make coat

31: coating coat (size coat) 32: anti-dust coating

40: foaming resin 41: foaming component

42: asymmetric foamed resin 50: adsorption member

60: release paper

Claims (6)

In an abrasive product comprising a coating adhesive, an abrasive, a production adhesive, a substrate, The base material 10 is made of an asymmetrical foaming resin 42 in which the foaming additive is mixed with the foaming resin 40, and the foaming component 41 is concentrated on one side and the other side is distributed only in general resin. The adsorbing member 50 is attached to one side in which the foaming component 41 is concentrated in the asymmetric foaming resin 42, and on the other side of which only the general resin is distributed, the production adhesive 30, the abrasive 20, and the coating adhesive 31 are used. Are stacked sequentially, Foamed abrasive product, characterized in that the dust pinch coating 32 is added to the upper side of the coating adhesive 31 again. The method of claim 1, The foamed resin 40 is a one-component or two-component resin having flexibility and elasticity, and includes a phenol resin, a melamine resin, a urethane resin, an epoxy resin, an alkyd resin, a vinyl acetate resin, an acrylic emulsion resin, a latex, a modified urethane rubber Composed of any one or a mixture of UV resins, A foaming abrasive product, characterized in that a foaming additive for generating a foaming component with low specific gravity is added to form an asymmetric foaming resin (42). The method of claim 2, The foaming additive is foamed abrasive product, characterized in that consisting of any one or more components of the physical foaming agent, including CO2, N2, Freon, EPS, MS. The method of claim 1, The adsorption member 50 is tightly coupled to one side of the asymmetric foaming resin 42 in which the foaming component 41 is concentrated, foamed abrasive product, characterized in that made of any one of nylon or nylon. The method of claim 1, The coating adhesive 31 may be any one or a mixture of phenol resin, melamine resin, urethane resin, epoxy resin, alkyd resin, vinyl acetate resin, acrylic emulsion resin, latex, modified urethane, rubber, UV resin, or UV resin. Foamed abrasive product, characterized in that configured. In the manufacturing method of the abrasive product, A mixing step of adding a foaming additive to the foamed resin 40 and stirring and mixing at room temperature; Foaming base material forming process of apply | coating foamed resin 40 which foaming additive was added to the release paper 60 which shows a mold release effect to predetermined thickness; A foaming component moving step of forming an asymmetrical foaming resin (42) by moving the foaming component (41) generated by the foaming additive upward by a aging process for a predetermined time in a drying furnace at a predetermined temperature; An adsorbing member adhering process for adhering the adsorbing member 50 to the upper side of the asymmetric foamed resin 42 in which the foaming component 41 is concentrated; The release paper 60 is removed, and the production adhesive 30, the abrasive 20, and the coating adhesive 31 are sequentially applied to the removed surface, and the anti-dust coating 32 is applied to the upper layer of the coating adhesive 31 again. Abrasives attaching step of applying a; Method for producing a foamed abrasive product, characterized in that consisting of.

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