KR20170034131A - Abrasive article having function for anti-curl - Google Patents

Abrasive article having function for anti-curl Download PDF

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Publication number
KR20170034131A
KR20170034131A KR1020150132434A KR20150132434A KR20170034131A KR 20170034131 A KR20170034131 A KR 20170034131A KR 1020150132434 A KR1020150132434 A KR 1020150132434A KR 20150132434 A KR20150132434 A KR 20150132434A KR 20170034131 A KR20170034131 A KR 20170034131A
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KR
South Korea
Prior art keywords
abrasive
curl
pattern layer
base layer
hardness
Prior art date
Application number
KR1020150132434A
Other languages
Korean (ko)
Inventor
장재욱
Original Assignee
주식회사 디어포스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 주식회사 디어포스 filed Critical 주식회사 디어포스
Priority to KR1020150132434A priority Critical patent/KR20170034131A/en
Publication of KR20170034131A publication Critical patent/KR20170034131A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/02—Wheels in one piece
    • B24D7/04—Wheels in one piece with reinforcing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/02—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D2203/00—Tool surfaces formed with a pattern

Abstract

In an abrasive article having a curl preventing function according to an embodiment of the present invention, a flexible base substrate, a base layer, and a pattern layer are sequentially bonded. The base layer has a pencil hardness of 1 H to 3 H. The pattern layer is formed by a plurality of polishing projections.
According to this, it is possible to provide an abrasive product having a curl preventing function that suppresses the occurrence of curling of the abrasive article even when the abrasive projection having a high hardness is formed.

Description

[0001] ABRASIVE ARTICLE HAVING FUNCTION FOR ANTI-CURL [0002]

The present invention relates to an abrasive product having a curl preventing function, and more particularly, to an abrasive product having a curl preventing function which suppresses the occurrence of curling of an abrasive product even when the abrasive protrusion having high hardness is formed.

Recently, a polishing method using a fluid polishing slurry not only requires a large amount of slurry but also requires separate equipment for stirring, processing, disposal and the like in order to produce a slurry having a uniform concentration and is not environmentally friendly Has been replaced with a solid abrasive product.

In the case of such a solid abrasive product, it takes a long time to obtain a predetermined abrasive effect as compared with a fluid abrasive slurry. To solve this problem, it is general to form abrasive projections using a resin having high hardness. In other words, currently, polishing products are mainly developed focusing on polishing efficiency.

However, when a resin having a high hardness is used to form the abrasive protrusion with high hardness, the curl phenomenon, that is, the abrasive product is bent in one direction so that the abrasive product can not have a straight section, A phenomenon occurs. Such curl phenomenon becomes more prominent when the abrasive product is processed into an abrasive belt, a polishing sheet, or a ring shape.

In the case where an abrasive product is abraded by a polishing belt, a polishing sheet or a ring-shaped abrasive product in which curling is generated, the abrasive product can be detached from the sanding tool due to the curl and when the abrasive product is detached from the sanding tool, There were problems that fatal defects or defects could be caused.

An object of the present invention is to provide an abrasive product having a curl preventing function which suppresses the occurrence of curling in an abrasive product even when a hard abrasive protrusion is formed.

According to an aspect of the present invention, there is provided an abrasive product having a curl preventing function, including: a flexible base material; A base layer having a pencil hardness of 1 H to 3 H; And a pattern layer formed by a plurality of polishing protrusions, wherein the flexible base substrate, the base layer, and the pattern layer are sequentially bonded.

The base layer may have a thickness of 10 [mu] m to 25 [mu] m.

The base layer may be a UV curable resin.

The pencil hardness of the pattern layer resin may be 6H to 8H.

The pattern layer may have a multi-directionality by including a polishing protrusion having three sides of triangle.

According to an embodiment of the present invention, it is possible to provide an abrasive product having a curl preventing function that suppresses curling of the abrasive product even when a hard abrasive protrusion is formed have.

Fig. 1 is a view for showing a curling phenomenon of a conventional abrasive product.
2 is a view showing an abrasive product having a curl preventing function according to an embodiment of the present invention.
3 is a graph showing grinding performance according to the hardness of the pattern layer.
4 is a graph for showing the height of curl according to the hardness of the pattern layer.
5 is a graph for showing the height of the curl according to the hardness of the base layer and the hardness of the pattern layer.
6 is a view showing a pattern layer according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

Hereinafter, exemplary embodiments will be described on the basis of embodiments best suited for understanding the technical characteristics of the present invention, and the technical features of the present invention are not limited by the illustrated embodiments, And that the present invention may be implemented with other embodiments. Therefore, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. In order to facilitate an understanding of the embodiments described below, in the reference numerals shown in the accompanying drawings, among the constituent elements which perform the same function in the respective embodiments, the related constituent elements are indicated by the same or an extension line number.

Fig. 1 is a view for showing a curling phenomenon of a conventional abrasive product.

1, a conventional abrasive product comprises a flexible base substrate 300 and an abrasive protrusion 110 coated on the surface of the flexible base substrate 300, in which case the abrasive product is oriented in one direction So that the abrasive product does not have a straight section and a curling phenomenon occurs with a curved section.

The curling phenomenon is more likely to occur when a strong resin or a high hardness resin is used to form the abrasive protrusion 110. It is common that the curl height h is also increased as the hardness or hardness of the resin is increased 4).

In the present specification, the height (h) of the curl is defined as a distance to the end of the abrasive product in a direction in which the abrasive product is bent in a direction perpendicular to the paper surface.

2 is a view showing an abrasive product having a curl preventing function according to an embodiment of the present invention.

The abrasive article 1 having a curl preventing function according to an embodiment of the present invention includes a flexible base substrate 300, a base layer 200 and a pattern layer 100, and the flexible base substrate 300, The base layer 200 and the pattern layer 100 are sequentially layered.

The base layer 200 may be a UV curable resin.

When the UV curable resin receives UV, the photoinitiator in the resin receives the UV energy and initiates the polymerization reaction. That is, the photoinitiator instantaneously polymerizes the monomer and the oligomer, which are the main components of the UV resin. The photoinitiator is not a main component of the UV resin but contains a small amount in the UV curable resin. When the UV curable resin is contained in the UV curable resin, the photoinitiator itself becomes a radical which can react well, and the oligomer as a main component of the UV curable resin is polymerized instantaneously .

The pattern layer 100 is a layer that directly polishes an object to be polished, and includes a polishing protrusion 110 for polishing the object, and the polishing protrusion 110 includes abrasive particles.

The abrasive grains typically have a particle size in the range of from about 0.1 microns to 1500 microns and may be selected from the group consisting of molten aluminum oxide, brown aluminum oxide, heat-treated aluminum oxide, and white aluminum oxide, ceramic aluminum oxide, green silicon carbide, Chromia, alumina zirconia, diamond, iron oxide, ceria, cubic boron nitride, boron carbide, garnet, and combinations thereof.

The term " abrasive particles " also means that a single abrasive particle is bonded to each other to form abrasive projections, and the abrasive particles are dispersed in the organic binder to form abrasive projections. The binder is derived from a binder precursor comprising an organic polymeric resin.

During the preparation of the abrasive article of the present invention, the binder precursor is exposed to an energy source that aids in initiating the polymerization or curing process. Examples of energy sources include thermal energy and radiation energy, the latter including electron beams, ultraviolet light, and visible light. During this polymerization process, the resin is polymerized and the binder precursor is converted to a coagulated binder. A polishing coating is formed upon solidification of the binder precursor.

Exemplary and preferred examples of organic resins are phenolic resins, urea-formaldehyde resins, melamine formaldehyde resins, acrylated urethane, acrylated epoxy, ethylenically unsaturated compounds, aminoplast derivatives having branched unsaturated carbonyl groups, at least one An isocyanurate derivative having a branched acrylate group, an isocyanate derivative having at least one branched acrylate group, a vinyl ether, an epoxy resin, and a mixture and a combination thereof.

A grinding aid may be added to improve the chemical and physical properties of the abrasive article. The grinding aid increases the friction between the abrasive particles and the abrasive article to be polished, prevents the abrasive particles from being " capped " (i.e., prevents metal particles from being welded on top of the abrasive particles in the case of metal objects) To reduce the interfacial temperature between the abrasive particles and the blank, to reduce the required grinding force, or to prevent oxidation of the metal blank, thereby increasing the service life of the abrasive product.

Optional additives such as fillers, fibers, lubricants, wetting agents, thixotropic materials, surfactants, dyes, pigments, antistatic agents, coupling agents, pigments, and suspending agents may further be included.

The amount of these materials can be selectively controlled depending on the characteristics of the desired abrasive product. The use of these may affect the erosion property of the abrasive protrusion 110. In some cases, the additive can cause the abrasive bumps 110 to become more eroded, thereby expelling the dull abrasive particles and exposing new abrasive particles.

3 is a graph showing grinding performance according to the hardness of the pattern layer.

The present inventors conducted a grinding experiment for 30 seconds using a point sanding machine in order to examine the grinding performance according to the hardness of the pattern layer 100 ( Experimental Example 1 ).

At this time, only the grinding performance was checked regardless of the generation of curl in the state where there was no base layer 200. The clear coat of Kick Company (kwick) was used as the casting body.

As a result of the experiment, it was found that the grinding force increases as the hardness of the pattern layer 100 increases, and that the pencil hardness of the pattern layer 100 is 6 H or more for grinding performance.

4 is a graph for showing the height of curl according to the hardness of the pattern layer.

The present inventors measured the height h of the curl according to the hardness of the pattern layer 100, and the size of the specimen was 140 mm * 115 mm ( Experimental Example 2 ).

As a result of the experiment, it was found that the curl height h increases as the hardness of the pattern layer 100 increases.

In addition, when the experimental results of the grinding performance and the curl height h according to the hardness of the pattern layer 100 are summarized, the pencil hardness of the pattern layer 100 is preferably 6 H or more, When the pencil hardness of the substrate 100 is 6 H or more, the curl height h is 3 cm or more, which can cause fatal defects in the ground product.

5 is a graph for showing the height of the curl according to the hardness of the base layer and the hardness of the pattern layer.

The present inventors measured the hardness of the base layer 200 and the height h of curl according to the hardness of the pattern layer 100. The size of the specimen was 140 mm * 115 mm ( Experimental Example 3 ).

5, Examples 1, 2, and 3 show cases where the pencil hardness of the base layer 200 is 1 H, 2 H, and 3 H, respectively, and Comparative Example 1, Comparative Example 2, and Comparative Example 3 The pencil hardness of the base layer 200 is 4H, 5H and 6H, respectively.

5, it can be seen that the curl height h is generally lowered as the hardness of the base layer 200 is lower. Particularly, when the pencil hardness of the base layer is 1 H to 3 H (Examples 1 to 3) It can be confirmed that the curl height h increases very slowly even when the hardness of the pattern layer 100 increases.

The pencil hardness of the pattern layer 100 is preferably 6 H or higher for the grinding performance. When the pencil hardness of the pattern layer 100 is 6 H, (H) of the curl can be lowered to 1 cm when the abrasive article includes the base layer 200 having a pencil hardness of 1 H to 3 H (Examples 1 to 3) I could.

On the other hand, when the pencil hardness of the base layer 200 is 1 H to 3 H (Examples 1 to 3) and the pencil hardness of the pattern layer 100 is 8, the height h of the curl is less than 3 cm , It was confirmed that the height of the curl can be ensured while increasing the grinding performance.

When the above results are summarized, it can be seen that when the pencil hardness of the base layer 200 is 1 H to 3 H (Examples 1 to 3) and the pencil hardness of the pattern layer 100 is 6 H to 8 H, And the height h of the lower curl can be ensured.

Next, the inventors measured the height h of curl according to the thickness of the base layer 200 ( Experimental Example 4 ).

At this time, the pencil hardness of the pattern layer 100 was 6 H, the pencil hardness of the base layer 200 was 2 H, and the size of the specimen was 140 mm * 115 mm. The experimental results are shown in Table 1.

Base layer thickness Height of curl (h) 5 탆 1.8 cm 10 탆 1 cm 20 탆 0.6 cm 25 m 0.8 cm 30 탆 0.5 cm (micro-detachment occurred) 40 탆 Flaking phenomenon occurred

Referring to Table 1, when the thickness of the base layer 200 is 10 占 퐉, the height h of the curl is approximately half as low as 1.8 cm to 1 cm as compared with the case where the thickness of the base layer 200 is 5 占 퐉 It was confirmed that it was lost.

It can be seen that as the thickness of the base layer 200 becomes thicker, the curl height h becomes substantially lower, and when the thickness of the base layer 200 is 30 microns, flaking phenomenon occurs.

The deflocculation phenomenon is a phenomenon in which the flexible base substrate 100 and the base layer 200 are separated from each other and generally occurs when the adhesion between the flexible base substrate 300 and the base layer 200 is poor.

When the experimental results are summarized, it has been confirmed that the base layer preferably has a thickness of 10 탆 to 25 탆 in order to lower the curl height h and prevent the slip-off phenomenon.

6 is a view showing a pattern layer according to an embodiment of the present invention.

Referring to FIG. 6, the pattern layer 100 according to an embodiment of the present invention may have a polishing protrusion 110 having three sides of a triangle. At this time, the abrasive protrusion 110 has a triangular base portion 120, and three surfaces contacting with the edge of the base portion 120 are triangular. That is, the polishing protrusion 110 has a shape of a tetrahedron including the base 120.

When the abrasive protrusions 110 have the above shape, the pattern layer 100 has multi-directionality by the abrasive protrusions 100 (see the arrows in Fig. 6), and the multi- Can be polished.

According to an embodiment of the present invention, the pattern layer 100 includes a first polishing protrusion 110a arranged in a forward direction and a second polishing protrusion 110b arranged in a reverse direction between adjacent first polishing protrusions 110a. ).

When the pattern layer 100 has the above-described configuration, the second polishing protrusions 110b, which are arranged in the reverse direction, are polished by the space in which the polishing is not performed by the first polishing protrusions 110a, It can be smoothly polished. That is, in order to remove defects or the like formed on the object to be polished during polishing, the first and second polishing protrusions 110a and 110b can polish the polishing material in multiple directions without using a separate polishing product.

The pattern layer 100 shown in FIG. 6A and the pattern layer 100 shown in FIG. 6B, in which the pattern layer 100 shown in FIG. 6A is rotated by 90 degrees, ), It is possible to further increase the multi-directionality, whereby the surface of the object to be exposed can be polished more smoothly.

1: abrasive product with curl prevention function
100: pattern layer
200: base layer
300: flexible base substrate

Claims (5)

A flexible substrate;
A base layer having a pencil hardness of 1 H to 3 H; And
A pattern layer formed by a plurality of polishing protrusions;
/ RTI >
Wherein the flexible base substrate, the base layer, and the pattern layer are sequentially bonded to each other. The method according to claim 1,
Wherein the base layer has a curl-preventing function with a thickness of 10 [mu] m to 25 [mu] m. The method according to claim 1,
Wherein the base layer is a UV-curable resin having a curl preventing function. The method according to claim 1,
Wherein the pattern layer resin has a pencil hardness of 6H to 8H. The method according to claim 1,
Wherein the pattern layer includes a polishing protrusion having three sides of a triangle, thereby having a curl preventing function having a multi-directionality.
KR1020150132434A 2015-09-18 2015-09-18 Abrasive article having function for anti-curl KR20170034131A (en)

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KR1020150132434A KR20170034131A (en) 2015-09-18 2015-09-18 Abrasive article having function for anti-curl

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KR1020150132434A KR20170034131A (en) 2015-09-18 2015-09-18 Abrasive article having function for anti-curl

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021137965A1 (en) * 2019-12-31 2021-07-08 Saint-Gobain Abrasives, Inc. Rigid backsize to prevent fiber disc curling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021137965A1 (en) * 2019-12-31 2021-07-08 Saint-Gobain Abrasives, Inc. Rigid backsize to prevent fiber disc curling

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