JPS606358A - Abrasive and its manufacturing method - Google Patents

Abstract

PURPOSE:To form an abrasive having improved polishing effect by applying liquid adhesive agent on the surface of a basic body of flexible synthetic resin, dispersing grinding particles on the adhesive agent still having viscosity, and allowing it to harden. CONSTITUTION:A basic body (A) made of polyurethane is guided into an adhesive agent containing tank 10 to impregnate it with the adhesive agent 11, the quantity of which is then adjusted by a squeezing roll 12. The basic body (A) is thereafter guided under a hopper 13 for supplying grinding particles 5 where a desired quantity of grinding particles 15 are stuck on the basic body (A) through a screen 14. Maintaining such a condition, the basic body is further guided into a crosslinking equipment 16, where the basic body is cured with steam 17 in order to form a final product. In this case, the grinding particles 15 are not embedded in the adhesive layer 11 but exposed thereon, so that their grinding effect can be fully developed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an abrasive material having an excellent abrasive effect and made of a soft synthetic resin foam, particularly preferably a polyurethane foam.

[Background technology]

BACKGROUND OF THE INVENTION Abrasive materials have been developed in which abrasive grains are fixed to a soft synthetic resin foam, particularly polyurethane foam, and have been widely used to polish the surfaces of ceramics, metals, glass, etc.

However, since this type of abrasive material is manufactured by dispersing abrasive grains in an adhesive and applying this to the foam surface, the surface of the abrasive grains is always covered with a thin film of adhesive. In general, since the abrasive grains are buried in the adhesive layer, there is no one that has an excellent polishing effect even though the abrasive grains are fixed.

FIG. 1 shows the state of abrasive grains produced by a conventional abrasive material, with reference numeral 1 indicating a foam material as a base, 2 an adhesive, and 3 an abrasive grain. As can be seen from this figure, the effect of abrasive grains is not fully exhibited in the abrasive material. [Object of the Invention] In consideration of the above facts, the present invention has been developed to provide an abrasive material with excellent abrasive effects and a method for manufacturing the same. The purpose is to obtain.

[Structure of the invention]

The abrasive material according to the present invention has an adhesive layer applied to the surface of a soft synthetic resin foam serving as a base, and abrasive grains that are partially in contact with and fixed to the adhesive layer. A liquid adhesive is applied to the adhesive by any means, and then, while the adhesive is still viscous, abrasive grains are sprinkled onto the adhesive by spraying or the like to bring it into contact with the adhesive, and then the adhesive is solidified.

In the present invention, polyurethane foam is generally used as the soft synthetic resin foam that serves as the base, but salt beer foam, polyethylene foam, etc. can also be used. In particular, polyurethane foam has a so-called membrane-free structure in which bubble membranes have been removed. It may be a reticulated foam, or it may be a compressed foam obtained by compressing and deforming the foam by heat pressing or the like to impart rigidity. In the case of polyurethane foam, the foam preferably has 5 to 100 cells (per inch).

The adhesive is not particularly limited, but rubber adhesives, thermoplastics, or thermosetting resins may be used. For example, urethane prepolymers, vinylidene chloride copolymers, vinyl chloride-vinyl acetate copolymers, etc. can be used as the adhesive.

Naturally, they can also be used together with so-called dispersants.

Furthermore, the abrasive grains may be of any commonly used abrasive grains and are not particularly limited, but examples include clay, mica, talc, alumina oxide, silicon carbide, magnesium oxide, cerium oxide, and zirconium oxide. 100 to 500 f/r/ to the substrate is typical.

The adhesion of the abrasive grains should be done before the adhesive is viscous and has completely solidified, so any method such as a spray method using a powder coating machine, or a sieving method such as spreading it uniformly through a sieve using an electromagnetic feeder, etc. is optional. selected.

[Embodiments of the invention]

Example 1 Flexible polyurethane foam (13 cells/1 inch)
The abrasive substrate was impregnated with an incyanate-rich urethane prepolymer as an adhesive. The foam was obtained by removing the bubble film, and the amount of impregnation and fixation was 150 wtX. Thereafter, the urethane prepolymer was crosslinked by scattering abrasive grains using the sieve method described above (crosslinking conditions were 70°C x 1
5 minutes, steam cure). The size of the base is 25x9
A hollow disk of 0φ×380φ was used.

In the obtained abrasive material, some of the abrasive grains are buried in the bonding agent layer, and the rest are all exposed.As a result of a field test (removal of dirt from P tiles), both stain removal and wax removal were good, and the cleaning ability was good. It was also very desirable.

FIG. 2 shows an example of the manufacturing process of the abrasive material of the present invention. As described above, the foam substrate A is first introduced into the adhesive bath 1O to be impregnated with the adhesive 11, and then the foam substrate A is introduced into the adhesive bath 1O, and then the foam substrate A is impregnated with the adhesive 11. Adjust the adhesion amount with .

Next, this substrate is introduced under a hopper 13 for supplying abrasive grains, and a desired amount of abrasive grains 15 are deposited thereon by a sieve 4. While maintaining this state, the product is guided into the crosslinking equipment 16 and cured with steam 17 to complete the product.

In FIG. 2, numeral 18 is an adhesive coating process, 19 is an abrasive grain adhesion process, 20 is a crosslinking/drying process, 21 is a powder recovery machine, and 22
indicates crosslinking equipment (steam cure).

FIG. 3 is a schematic diagram of the abrasive material produced in Example 1K, and the reference numerals are the same as in FIG. 1. As can be seen from the figure, when the abrasive grains are dispersed in a sieve-like manner, the abrasive grains are exposed without being buried in the adhesive layer, and the effect of the abrasive grains can be fully demonstrated. be.

Example 2 In Example 1, after the substrate was moistened with water, powdered polyethylene resin was applied and the amount of adhesion was adjusted to be the same as the foam weight. This was placed in an oven at 200°C to melt the polyethylene and attach it to the foam skeleton. In this state, clay was applied using a sieving method of approximately the same weight, and then polyethylene (adhesive) was solidified to obtain an abrasive. It was excellent in terms of durability and polishing effect.

Example 3 In Example 1, an abrasive was obtained by using the substrate which had been compression-molded in advance using a hot press at 200° C. to a thickness of 1/2 (compression rate: 50%). This product did not lose its shape or become sticky, and could withstand long-term harsh outdoor use.

〔Effect of the invention〕

As explained above, in the abrasive material according to the present invention, an adhesive layer is provided on the surface of a synthetic resin foam, and a part of the abrasive grains are fixed and exposed by contacting the adhesive layer, and the abrasive material according to the present invention is manufactured. In this method, a liquid adhesive is applied to the surface of the synthetic resin foam, then abrasive grains are brought into contact with the adhesive while it is still viscous, and then the adhesive is solidified, resulting in a highly effective polishing process. material can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an enlarged schematic cross-sectional view of a conventional abrasive material, FIG. 2 is a process diagram showing the method of Example 1 of the present invention, and FIG. 3 is a schematic enlarged cross-sectional view of the abrasive material of the present invention. 1... Foam base, 2... Adhesive 3... Abrasive agent Patent attorney Atsushi Nakajima Figure 1

Claims (2)

[Claims] (1) In an abrasive material composed of a 7-ohm soft synthetic resin with abrasive grains fixed to it, there is an adhesive layer applied to the surface of the foam, and an exposed surface that is partially in contact with and fixed to the adhesive layer. Abrasive material with abrasive grains. (2) An abrasive material characterized by applying a liquid adhesive to the surface of a soft synthetic resin foam, then bringing abrasive grains into contact with the adhesive while it is viscous, and then solidifying the adhesive. Production method.