JPH0540933Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a nonwoven abrasive material useful for polishing curved surfaces with complex shapes.

[Prior Art] Conventionally, sheet-like abrasive materials have existed in which a coating material is evenly and evenly applied to a base fabric made of non-woven fabric.

[Problem to be solved by the invention] However, although the above-mentioned abrasive has some flexibility, the coating material is evenly applied, so it cannot be used on complex curved surfaces (such as the inner surfaces of sculptures and articles). I didn't quite get used to it. Furthermore, it was not easy to remove the abrasive powder.

Therefore, an object of the present invention is to provide an abrasive which is highly flexible, can conform well to complex curved surfaces, and can easily remove abrasive powder.

[Means for Solving the Problems] In order to solve the above problems, the present invention uses a nonwoven fabric in which monofilaments 5 are arranged randomly and three-dimensionally, and the intersections of the monofilaments 5 are bonded with an adhesive. The base fabric 4 contains 20 to 90% by weight of abrasive particles with a particle size of 1 to 300μ, contains a lubricant, a surfactant, and a pigment, is hardened with a thermosetting synthetic resin, and has a fingertip-sized base fabric. A large number of coatings 2 are formed on the surface of the base fabric 4 in a regular pattern at a surface coverage rate of 5 to 50% and a space filling rate of 0.5 to 50%. It is characterized in that the particles are scattered in a shape, and the coating is applied with gaps 3 for removing chips provided between each coating material 2.

[Function] (1) In the present invention, the base fabric 4 is made of nonwoven fabric, and the ratio of the coating material 2 to the base fabric 4 is 5 to 50 percent in surface coverage and 0.5 to 50 percent in space filling, so that the coating material 2 has abrasive ability while maintaining sufficient flexibility.

(2) Furthermore, since a lubricant is added to the coating material 2, chips are smoothly removed from the surface of the nonwoven abrasive material 1.

(3) In addition, in this non-woven abrasive material 1, since the coating material 2 is evenly applied to the sheet-like base fabric 4 in a regular pattern, the coating material 2 is always applied evenly to the object to be polished. This prevents stress from concentrating on specific locations.

[Example] Next, an example of the present invention will be described based on the drawings.

<First Example> As shown in FIGS. 1 and 2, this nonwoven abrasive material 1 is formed by providing a large number of coating materials 2 on a base fabric 4.

The base fabric 4 is a nonwoven fabric in which monofilaments 5 are arranged randomly and three-dimensionally, and the intersections of the filaments are bonded with an adhesive.

The coating material 2 includes a mixture of abrasive particles, a thermosetting resin, and an additive applied to a base fabric 4;
It is formed by hardening.

The abrasive particles have a particle size of 1 to 300 microns, and account for 20 to 90 percent by weight of the coating material 2.

Suitable thermosetting resins include phenolic resins, epoxy resins, polyurethane resins, polyester resins, alkyd resins, and combinations thereof.

Additives account for up to 5 percent of the coating 2 and include lubricants, surfactants, and pigments.

The reason for adding the lubricant is to prevent chips from adhering to the surface of the nonwoven abrasive material 1 when it is used. Oils, fats, waxes, etc. are suitable.

The reason for adding a surfactant is to ensure sufficient mixing of the lubricant and thermosetting resin.
Metal soaps (calcium stearate or zinc) are suitable.

The purpose of adding the pigment is to change the color of the abrasive 1 according to the particle size of the abrasive particles contained therein (different colored pigments), thereby making it easier to identify various abrasives.

Then, the coating material 2 (in liquid form at that time), which is the above mixture, is applied to the base fabric 4 and cured.

At this time, the surface coverage of the surface layer 6 of the base fabric 4 is set in a range of 5 to 50 percent, and gaps 3 suitable for removing chips are provided. Then, form a pattern partially and regularly, and apply it evenly so that the size does not exceed a circle that is the size of a fingertip (approximately 20 diameters on the ventral surface of the fingertip). This allows great flexibility.

In addition, the space filling rate inside the base fabric 4 is set to 0.5 to 50.
Percentage range. This is because the base fabric 4 is a non-woven fabric and the mixture easily penetrates inside.
This is because the flexibility decreases when reaching from the surface layer 6 to the back layer, so by limiting the space filling rate to this range, great flexibility is ensured.

The shape of the pattern may be any shape such as a circle, polygon, star, lattice, or scratch.

According to the nonwoven abrasive material 1 configured as described above, since it has high flexibility, it flexibly adapts to complex curved surfaces, and it is possible to sufficiently polish even such curved surfaces. .

<Second Example> Next, a second example of the present invention will be described in comparison with one example.

As shown in FIGS. 3 and 4, the base fabric 4 of this nonwoven abrasive material 1 is a bulky thick nonwoven fabric intertwined with monofilaments 5 that are thicker than those of the first embodiment. Further, the coating material 2 is applied in a dot-like manner by penetrating from the surface layer 6 to the middle layer 7.

In this embodiment, since the monofilament is thick, it is stiff and may be difficult to bend and use, but depending on the object to be polished, this may have the effect of increasing polishing efficiency.

[Effect of the idea] This invention has the following effects.

(1) The base fabric 4 of the present invention is made of a nonwoven fabric, and the ratio of the coating material 2 to the base fabric 4 is 5 to 50% for the surface coverage and 0.5 to 50% for the space filling rate, so the polishing ability is while maintaining sufficient flexibility.

Therefore, even when the surface to be polished is a complicated curved surface, by bending the base cloth 4 to fit the curved surface of the surface to be polished, the curved surface can be well polished without leaving any polishing residue, and the polishing It is also possible to actively remove chips by

That is, the surface coverage rate of the coated material 2 to the base fabric 4 is 5 to 50%, and the space filling rate is 0.5 to 50%.
If each ratio increases beyond 50%, the flexibility and chip removal ability will be significantly reduced, and conversely, if each ratio becomes smaller without satisfying the above ratio, a problem will occur in which the polishing ability will be significantly reduced. However, the nonwoven abrasive material of this invention does not have such problems.

(2) Furthermore, since a lubricant is added to the coating material 2, it is possible to effectively prevent chips from adhering to the surface of the nonwoven abrasive material 1 (even after the coating material 2 has solidified). It has such an effect).

(3) In addition, in this non-woven abrasive material 1, since the coating material 2 is evenly applied to the sheet-like base fabric 4 in a regular pattern, the coating material 2 is always applied evenly to the object to be polished. This prevents stress from concentrating on specific locations. For this reason, the object to be polished may be partially over-polished, or
It is possible to uniformly finish the polished surface without causing variations such as under-polishing.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a thin nonwoven abrasive material according to a first embodiment of the present invention, and FIG. 2 is a sectional view thereof. Further, FIG. 3 is a plan view of the thick nonwoven abrasive material of the second embodiment, and FIG. 4 is a sectional view thereof. 1... Nonwoven abrasive material, 2... Coated material, 3... Gap, 4... Base fabric.

Claims (1)

[Claims for Utility Model Registration] A base fabric 4 made of a nonwoven fabric in which monofilaments 5 are arranged randomly and three-dimensionally and the intersections of the monofilaments 5 are bonded with adhesive is provided, and the base fabric 4 has a particle size of 1 to 300μ A large number of coatings 2 containing 20 to 90% by weight of abrasive particles of particle size, containing a lubricant, a surfactant, and a pigment, solidified with a thermosetting synthetic resin, and shaped like a fingertip are provided, A large number of coating materials 2 are applied to the surface of the cloth 4 at a surface coverage rate of 5 to 50% and a space filling rate of 0.5 to 50%.
A non-woven abrasive material 1 characterized in that it is applied at a rate of 50% in a regular pattern with gaps 3 for removing chips between each of the applied materials 2.