KR20070108665A - Multi-layer abrasive material and it's manufactoring process - Google Patents

Abstract

A method of manufacturing a multi-layer abrasive material is provided to improve endurance of abrasive materials by wearing a normal coated abrasive, a bonded abrasive, a resin-impregnated abrasive or a second abrasive material in order during an abrasion process. A method of manufacturing a multi-layer abrasive material comprising a material(10), an abrasive(20), and an adhesives(30) includes the steps of: coating the rear surface of the material with a bonding material(40); and bonding one of a bonded abrasive(50), a resin-impregnated abrasive or a second abrasive material onto the material. The material is made by bonding at least one among paper, a film, a fabric, and a vulcanized fiber. The bonded abrasive includes at least one among vitrified stone, a resinoid stone, a PVA(Polyvinyl Alcohol) stone, and CBN.

Description

MULTI-LAYER ABRASIVE MATERIAL AND IT'S MANUFACTORING PROCESS}

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

2 is a cross-sectional view of a multilayer abrasive product as one embodiment of the present invention;

3 is a side view of a multilayer abrasive product as another embodiment of the present invention;

4 is a side view of a multilayer abrasive article as another embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

1: pepper products 10: base material

20: abrasive 30: production adhesive

31 coating adhesive 40 binder

50: grindstone product 51: grindstone

60: resin impregnated abrasive 61: abrasive grain

70: secondary pepper products 71: secondary abrasives

 The present invention is a multi-layer abrasive product by combining any one or more of a grindstone product, a resin impregnated abrasive or a secondary pepper product on the back of the substrate of the general Coated Abrasives product and a significantly improved grinding performance and durability and its manufacture It is about a method.

Common pepper products (or abrasive products, abrasive cloth products; commonly used in combination) are as shown in Figure 1 (Backing Material 10), adhesive (Make Coat, Size Coat; 30, 31), abrasives It consists of three elements such as (Abrasive; 20), and the pepper products 1 are manufactured in various forms such as sheets, belts, discs, and wheels, depending on the purpose. .

At this time, the base material 10 is a woven fabric using a variety of fibers, the adhesive (30, 31) may use both a thermosetting adhesive and a thermoplastic adhesive, the abrasive 20 is of various kinds depending on the use of the product Use abrasive materials.

Generally, when the product of the paper product (1), which is the base material 10, is used in the form of an abrasive disc, the tensile strength of the fabric used as the base material 10 is low and the elongation is high. There was a problem that the rotational stability and durability is lowered, the polishing performance and polishing persistence is deteriorated, the formability is easily changed to the external environment (humidity, temperature, etc.) or the external force, there is a problem that the workability is inferior.

In order to improve this, a fiber product has been proposed, but the fiber product has a strong durability compared to the product of which the base material 10 is a fabric, while the workability due to degreasing at high loads and high RPM and risk of breaking the product It appeared, and had a problem that the form is easily changed to the external environment or external force.

The present invention has been made in order to solve the above problems, it is applied to the binder (synthetic resin adhesive) on the back of the general Coated Abrasives products, any one of the grindstone products, resin impregnated abrasives or secondary pepper products It is an object of the present invention to provide a multilayer abrasive product and a method of manufacturing the same, which have strong durability and no change in form, and which are capable of continuous polishing.

The present invention implements a multilayer abrasive product by combining at least one of a grindstone product, an resin impregnated abrasive, or a secondary pepper product to the back surface of the paper product to improve grinding performance and durability, and to maintain continuity of work. The technical features of the ship.

The multilayer abrasive product according to the present invention has a strong durability due to the multilayer structure and does not deform in shape due to external environment (humidity, temperature, etc.) or external force, and in particular, the upper part of the abrasive product is the lower part of the abrasive product after wear by repeated use. That is, since the abrasive or the resin-impregnated abrasive including the abrasive component is exposed and wears sequentially uniformly, continuous polishing operation is possible.

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

2 is a cross-sectional view of a multilayer abrasive product as an embodiment of the present invention, FIG. 3 is a side view of the multilayer abrasive product as another embodiment of the present invention, and FIG. 4 is a side view of a multilayer abrasive product as another embodiment of the present invention. to be.

As an example, the multilayer abrasive product according to the present invention has a substrate 10, an abrasive 20 bonded to the substrate 10 by a production adhesive 30 on top of the substrate 10, and the abrasive. Bonded Abrasives (50) bonded by a binder 40 to the lower part of the substrate 10 made of a coating adhesive 31 applied to the outside of the substrate 20 by a binder 40 Configure.

The basic configuration of the paper products 1 consisting of the substrate 10, the abrasive 20, the adhesive 30, 31 is a patent application 10-2006-0025971 filed by the applicant of the present application (name of the invention: strong durability and Abrasive product having excellent grinding performance and durability and a method of manufacturing the same) have already been introduced in the prior art, which will be briefly described below.

The abrasive 20 is made of aluminum oxide, silicon carbide, zirconia alumina oxide, ceramic, garnet, artificial diamond, flint, emery, crocus (iron oxide powder), granular, etc. These may be used alone or in combination of these abrasives.

The adhesive 30 and 31 are applied by a make-coat adhesive 30 to perform a role of primarily fixing the abrasive 20 on the entire surface of the substrate 10 of the paper product 1. In addition, a size-coat adhesive 31 is applied again on the abrasive 20 to improve grinding power and improve grinding durability by adding a grinding aid.

In addition, the grindstone product 50 is composed of an abrasive having a predetermined particle size (Grain), a binder (Bond), pores (Pore) and a bonding auxiliary fabric, after mixing the abrasive and the binder is pressed under a predetermined temperature, time conditions It is manufactured by molding through and curing it at a predetermined temperature.

The grindstone product 50 used in the present invention may include any one of Vitrified grindstone, Resinoid grindstone, Polyvinyl alcohol grindstone, and boron nitride (CBN). It is an abrasive product comprised including, The grindstone 51 is contained in the inside as a large quantity microcrystal which functions as an abrasive material.

Moreover, the paper product 1 and the grindstone product 50 which consist of the said base material 10, the abrasive material 20, the adhesive agent 30, 31, and the resin impregnated abrasive material 60 or secondary peppers mentioned later There is a need for a separate adhesive component used to firmly bond the product 70.

To this end, in the present invention, as a two-component synthetic resin, polyurethane, acrylic, epoxy resin and the like, a curing accelerator, and a low boiling point solvent (Solvent) are mixed to form a binder 40, and a high solid content to have a strong bonding force in a small coating amount Preference is given to using a binder 40 having

The two-component synthetic resin, which is a component of the binder 40, is a mixture of a main body, a curing agent, or a curing accelerator. Since the curing agent is added, it is a thermosetting resin which can be dried by inputting less heat energy than a one-component synthetic resin.

Of course, a one-component synthetic resin can also be used if necessary.

Meanwhile, as shown in FIG. 3 as another embodiment of the present invention, the resin-impregnated abrasive 60 may be bonded to the lower portion of the substrate 10 in place of the grindstone product 50.

The resin-impregnated abrasive 60 is impregnated with a synthetic resin impregnated with abrasive grains (61), which are generally used in pepper products, and at this time, a suitable organic silicon component is added to increase adhesion between the abrasive grains 61 and a synthetic resin. It is manufactured by.

The abrasive grains 61 are generally the same as the abrasive 20 used in the paper products, and the names and symbols are separately indicated for convenience of description.

In one embodiment of the present invention, the abrasive grains 61 is aluminum oxide (particle size P36), the resin is a two-component epoxy resin. As the organosilicon component additive, an organic functional silane which is a coupling agent is mixed at a ratio of 100 (abrasive material): 30 (resin): 1 (additive).

In addition, as shown in FIG. 4 as another embodiment of the present invention, by combining the secondary pepper products 70 made of the secondary abrasive 71 to the lower portion of the general pepper products by the binder 40 Can also be used.

The secondary abrasive 71 is the same component as the abrasive 20 used in the pepper product 1, and the pepper product 1 and the secondary pepper product 70 have the same manufacturing method and configuration. For convenience of understanding, a separate name and number have been given, and in FIG. 4, the coating adhesive is omitted to avoid confusion of the display line.

At this time, the secondary abrasive 71 is preferably smaller in particle size than the abrasive 20 in order to firmly bond the pepper product 1 and the secondary pepper product 70 by the binder 40.

In addition, the manufacturing process of the abrasive product by this invention is as follows.

1) Manufacturing Coated Abrasives Products

First, a thermosetting or thermoplastic production adhesive 30 is applied to the entire surface of the substrate 10 used for general paper products 1 such as paper, fabric, and film, and the abrasive 20 is attached thereto. At this time, the coating amount of the production adhesive 30 is variable according to the mesh (particle size) of the abrasive 20, of course.

The method of attaching the abrasive 20 may be gravity or electrodeposition, and gravity and electrodeposition may be used at the same time depending on the characteristics of the product. Then, the substrate 10 with the abrasive 20 is dried at a temperature of 90 to 110 ° C. for 1 hour to 1 hour and 30 minutes, and then coated with the coating adhesive 31 thereon, and then again at a temperature of 90 to 110 ° C. 1. Drying time ~ 1 hour 30 minutes to prepare a pepper product (1).

2) Manufacture of Bored Abrasives

First, the abrasive (grinding stone) 51 of the particle size to be manufactured and the organic or inorganic adhesive are uniformly mixed.

At this time, the adhesive is selected according to the desired product properties (type of workpiece, working conditions, product strength, etc.).

Next, the mixture is applied to a mold in a desired size, and then, a grindstone product is manufactured through a press process at a predetermined temperature and pressure, and the time for which the press process is performed is a kind of an adhesive and an abrasive. 51), depending on the particle size.

Applicant of the present application was subjected to the sanding test applied to the following [Example D] to demonstrate the effect of the grindstone product 50, the results will be described later.

3) Manufacture of resin impregnated abrasives

First, the abrasive grains 61, which are generally used for pepper products, are impregnated with a synthetic resin and stirred, and at this time, a suitable organosilicon component is added to increase the adhesion between the abrasive grains 61 and the synthetic resin.

When the abrasive grains 61 are evenly dispersed in the synthetic resin, it is prepared by applying a predetermined thickness to the upper surface of the substrate used for general pepper products, and drying at a predetermined temperature and time.

In one embodiment of the present invention, the abrasive grains 61 is aluminum oxide (particle size P36), the resin is a two-component epoxy resin. As the organosilicon component additive, an organic functional silane which is a coupling agent is used.

At this time, the mixing ratio is agitated while maintaining 100 (abrasive material): 30 (resin): 1 (additive), and after the stirring is completed again after coating to a non-woven fabric (not shown) 3mm thickness 90 ~ 110 ℃ The resin-impregnated abrasive 60 is produced by drying at a temperature of 1 hour 30 minutes to 2 hours.

At this time, the blending ratio and coating thickness can be variably adjusted according to the particle size of the abrasive grains 61 and the type of synthetic resin used.

The applicant of the present application performed a sanding test by applying the following [Example E] to demonstrate the effect of the resin-impregnated abrasive 60, the results will be described later.

4) bonding process

The binder 40 is applied to the back surface of the substrate 10 of the pepper products 1 through a binder coating facility, wherein the coating amount of the binder 40 is used by a wet film thickness gauge, and a coating standard is 500 to 1500 μm thick. Is applied.

Next, volatilizing the solvent (Solvent) contained in the binder 40 to pass through the 100 ~ 110 ℃ drying furnace for 1 minute to 2 minutes to maximize the binding force of the binder 40, and dried After the grindstone product 50, the resin impregnated abrasive 60, or the secondary pepper product 70 pass through rollers which are in contact with each other and are bonded to each other by a uniform pressure to the binder-coated side. Done.

Hereinafter, in order to prove the groundbreaking polishing performance and durability of the abrasive product by the above manufacturing process, among the representative paper products, the base material is composed of fabric (Comparative Example A), the base material is composed of fiber (Comparative Example B), The pomegranate product (Comparative Example C) was compared with the multilayer abrasive product according to the present invention (Example D, Example E, Example F), and a sanding test was conducted, and the results are divided into tables and graphs below.

[Comparative Example A]

Pepper products using a blended fabric (fabric) as a base material in the manufacturing process of paper products and applying aluminum oxide as an abrasive (our product XA911 P24)

[Comparative Example B]

Pepper products in which the bulk material is used as a base material in the manufacturing process of pepper products, and the aluminum oxide is applied to the abrasive (Our product VA113 P24)

[Comparative Example C]

In the process of manufacturing a grindstone product, the abrasive is applied aluminum oxide, and the adhesive is a grindstone product using an inorganic adhesive.

Example D

Abrasive products in which polyester fabric is used as a base material in the manufacturing process of pepper products, and the abrasives are combined with ordinary grinding products through the bonding process with the pepper products (Our product PA631 P24) with aluminum oxide applied.

Example E

 Abrasive product in which a polyester fabric is used as a base material in the manufacturing process of pepper products and the resin-impregnated abrasive material (particle size P36) is bonded through the bonding process with the pepper products (our product PA631 P24) applied with aluminum oxide.

Example F

 Secondary material, which has the same product but somewhat smaller particle size through the process of combining polyester fabric (fabric) as a substrate in the manufacturing process of paper products, and the abrasive product with the paper products (Our product PA631 P24) with aluminum oxide. Abrasive products combined with pepper products (our product PA631 P36)

 [Sanding condition]

  (1) Shape and size of abrasive product: 7 inch (17.78 cm) disc

  (2) Grinding object: SUS-304

  (3) Sanding Load: 3kgf

  (4) Sanding time: 20 times for 2 minutes, 3 times

  (5) Sanding Rotational Speed: 12,000rpm

  (6) Sanding Condition: Dry Polishing

  (7) sanding compared products

      Comparative Example A: General Pepper Products (Our Product XA911 P24)

      Comparative Example B: general pepper products (our company VA113 P24)

      Comparative Example C: Typical Limestone Products

      Example D: Abrasive product according to the invention (particle size P24)

      Example E: Abrasive product according to the invention (particle size P24)

      Example F: Abrasive Product According to the Present Invention (Particle Size P24)

(Graph 1)

(Graph 2)

(Graph 3)

As shown in [Graph 1], [Graph 2], and [Graph 3], the multilayer abrasive products according to the present invention (Example D, Example E, and Example F) are based on fabrics among general pepper products. Compared with the applied product (Comparative Example A), the fiber-based product (Comparative Example B), and the normal grindstone product (Comparative Example C), the polishing performance was improved. Improved.

In the abrasive product according to the present invention, after the normal pepper products of the upper part are worn, the grindstone product 50, the resin impregnated abrasive 60, or the secondary pepper 70 product is uniformly worn out sequentially. Participation was confirmed to improve the polishing persistence.

 In other words, among the general pepper products, the fabric-based products have low durability and are easily worn to reduce the amount of polishing (average of about 30 g), and the durability of polishing has decreased (average of seven times: about 14 minutes). In addition, the fiber-based products of general pepper products have increased the polishing amount by about 3 times (average about 90g), and the polishing durability also increased (average 13 times: about 26 minutes), but at high load and high rpm Due to the deformation of the product, vibration occurred during the sanding test, resulting in a problem of poor workability.

In addition, the general grindstone product has a small amount of polishing per sanding but lasts up to 20 sandings with a similar polishing amount. However, due to the inelasticity of the product, roughness of the workpiece surface was reduced, scratches occurred, and there was a risk of product breakage.

On the other hand, the polishing amount and polishing persistence of the multilayer abrasive product (Example D, Example E, Example F) according to the present invention were derived as follows.

 The amount of polishing was increased by 2 ~ 3 times compared to general fiber products, and the durability of polishing was dramatically increased, and it has strong durability, so it has a good feeling of polishing, and there is no deformation of the product at high loads and high rpms to ensure working stability. Could.

In addition, the above results indicate that the polishing life of the general pepper products is finished at 7 times and 13 times, respectively, whereas the multilayer abrasive product according to the present invention wears about 20% to 50% after 20 sandings, resulting in the final polishing amount and the durability It will be apparent that silver has a polishing amount and polishing life above the above result.

Thus, in order to determine the final polishing amount and the polishing life of the abrasive products according to [Example D], [Example E], and [Example F], the same sanding test was performed as described above, and the polishing amount was performed once (two minutes). The test was performed until it became 1 g or less, and the result was described by the following table.

TABLE 1 Final grinding amount of multilayer abrasive products according to the present invention

Comparative Example A: average of about 30 g / Comparative Example B: average of about 90 g / Comparative Example C: average of about 150 g

1 time Episode 2 3rd time Average Example D 535 g 542 g 532 g 536 g Example E 387 g 390 g 382 g 386 g Example F 368 g 372 g 365 g 368 g

Table 2 Final grinding life of multilayer abrasive products according to the present invention

Comparative Example A: Average of about 14 minutes / Comparative Example B: Average of about 26 minutes / Comparative Example C: Average of about 90 minutes

1 time Episode 2 3rd time Average Example D 194 minutes 208 minutes 190 minutes 197 minutes Example E 128 minutes 134 minutes 128 minutes 130 minutes Example F 116 minutes 102 minutes 106 minutes 108 minutes

As shown in [Table 1] and [Table 2], the multilayer abrasive products according to the present invention (Example D, Example E, and Example F) are general pepper products (Comparative Example A) and general fiber products (Comparative). Example B), it was confirmed again that the grinding performance and the final grinding life were significantly improved (more than 200%) compared to general grindstone products (Comparative Example C).

The multi-layer abrasive product according to the present invention combines one or more of the grindstone product 50, the resin impregnated abrasive 60, or the secondary pepper product 70 with the general pepper product 1 to form a solid multilayer structure. As a result, durability and polishing sustainability are maintained even under high load and high RPM working conditions, and there is an effect of preventing deformation of the product due to external environment (humidity, temperature, etc.) or external force.

In addition, it prevents the deterioration of workability due to degreasing of the abrasive product and the risk due to the breakage of the product appearing in the conventional fiber products.

In addition, as the abrasives of the upper layer pepper products are worn during the polishing operation, the lower grindstone products 50, the resin impregnated abrasives 60, or the secondary pepper products 70 are sequentially worn, thereby increasing the durability of polishing and continuously Polishing has been improved to enable it.

Claims (10)

In an abrasive product comprising a substrate, an abrasive, and an adhesive, Applying a binder to the back side of the substrate and bonding any one of a grindstone product, a resin impregnated abrasive, or a secondary pepper product. The method of claim 1, The substrate is a multilayer abrasive product, characterized in that any one or more of the combination of paper (Paper), Film (Film), Fabric (Fabric), Bulkerized Fiber (Vulcanized Fiber). The method of claim 1, The grindstone product is characterized in that it comprises at least one component of Vitrified (Vitrified), Resinoid (stone), Polyvinyl alcohol (PVA), and boron nitride (CBN) Multilayer abrasive products The method of claim 1, The resin-impregnated abrasive may be aluminum oxide, silicon carbide, zirconia alumina oxide, ceramic, garnet, artificial diamond, flint, emery, crocus (iron oxide powder), or granular. A multilayer abrasive product, comprising: impregnating one or more abrasives into a two-component synthetic resin to heat-harden it. The method of claim 1, The secondary pepper product is a multilayer abrasive product, characterized in that it comprises a secondary abrasive comprising a size of 90% or less than the size of the abrasive bonded to the top of the substrate. The method of claim 1, The binder is selected from the group consisting of polyurethane, acrylic, epoxy resin, and at least one selected from the group consisting of a two-component synthetic resin by mixing a curing accelerator and a solvent. In the manufacturing method of the abrasive product, A coated abrasives product manufacturing process for applying a production adhesive to the entire surface of the substrate, attaching an abrasive, and then applying a coating adhesive on the abrasive; The binder is applied to the back surface of the paper product of 500 ~ 1500㎛ thickness, passed through a drying furnace at a predetermined temperature for a predetermined time to volatilize the sorbent contained in the binder and dried, and then to the side to which the binder is applied. A method for producing a multilayer abrasive product, characterized in that one of the pomegranate product, the resin impregnated abrasive, or the secondary pepper product is brought into close contact with each other, and is pressed by a uniform pressure to each other through a roller. The method of claim 7, wherein The grindstone product is manufactured by uniformly mixing an abrasive (grindstone) having a predetermined particle size with an organic or inorganic adhesive, applying the mixture to a molding mold, and then pressing the same at a predetermined temperature and pressure. A method for producing a multilayer abrasive product. The method of claim 7, wherein The resin-impregnated abrasive material is impregnated with abrasive grains of a predetermined particle size in a synthetic resin, added with an organosilicon component and stirred, applied to a predetermined thickness on the substrate used in general pepper products, and dried for a predetermined temperature and time Method for producing a multilayer abrasive product, characterized in that it is produced. The method of claim 9, The abrasive grains are aluminum oxide (particle size P36), a two-component epoxy resin as a resin, and an organic functional silane which is a coupling agent as an organosilicon component additive, The mixing ratio of each component is 100 (abrasive material): 30 (resin): 1 (additives) to maintain the manufacturing method of the multilayer abrasive product.

Images