JPS6144782Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an elastic thread-like abrasive material in which thread-like abrasive bodies are embedded in a flexible substrate.

BACKGROUND OF THE INVENTION Conventionally, polishing brushes, brushes, etc. have a plurality of filamentous abrasive materials folded in half and implanted into holes provided in a substrate. However, since the filamentous abrasive contains abrasive grains, when it is implanted, the parts of the mechanical equipment that come into contact with it are subject to severe wear, resulting in extremely poor workability. Furthermore, since the filamentous abrasive material is simply folded into two and implanted in the holes of the substrate, there is a drawback that the filamentous abrasive material falls out during use as an abrasive material. In addition, if the material of the substrate is a material that is not flexible and has poor flexibility, such as a wooden roll or a metal roll,
It is difficult to follow the object to be polished which has irregularities, and therefore the polishing efficiency is poor.

Even when the filamentous abrasive material is planted using the known flotski process or the artificial grass flocking method, the abrasive grains contained in the filamentous abrasive material cause severe wear on the planting machine, and furthermore, the length of the filamentous abrasive material is short when it is planted. However, in the case of machine parts with complex surfaces that are difficult to polish, or abrasive belts used in the rough polishing process of buffing, the resulting abrasive material cannot be wound on a roll. When using it for raising woven cloth, matting metal surfaces, removing rust from metal plates, etc., there are disadvantages such as the thread-like abrasive material coming off and the substrate stretching, etc., making it impossible to achieve the purpose of polishing. be.

The present invention provides a new elastic filament abrasive material which can be used for various purposes, eliminating the above-mentioned drawbacks of the conventional abrasive material.

In other words, by providing a coating layer of a high molecular weight polymer that can be eluted with an appropriate solvent on the surface of the thread-like filament, the planting work can be done easily and smoothly, greatly improving workability, and it can also be used as an abrasive. This improves the accuracy and durability of

Embodiments of the present invention will be described based on the drawings.

In FIG. 1, reference numeral 1 denotes a thread-like filament, which is made of a filament fiber made of a synthetic polymer mixed with abrasive grains 12, and its fineness varies depending on its purpose. FIG. 2 is an enlarged sectional view of a filamentous abrasive body 6 in which a coating layer 2 of a leached high molecular weight polymer, which will be described later, is provided on the surface of the filament filament 1. If the fineness is small, a large fineness can be easily obtained by aligning a plurality of pieces and then coating them. The following method may be used to coat the surface of the thread-like filament 1 with the elutable polymer 2.

(a) A thread-like filament is immersed in a solution of a high-molecular-weight polymer that can be eluted to form a film on its surface.

(b) A method in which a high molecular weight polymer that can be eluted from a separate spinning hole is spun out during melt-spinning of thread-like filaments, and is spun out while covering the thread-like filament bodies to integrate them.

(c) A method in which a thread-like filament is inserted into a spinneret and extracted while coating the outside with a high molecular weight polymer that can be eluted.

etc.

In FIGS. 4 and 5, 3 is a substrate, and the base material used for this is flexible and varies depending on the application, but it is sufficient to securely hold the implanted thread-like abrasive body 6 during polishing work. Thickness and tensile strength are required, and depending on the purpose of use, a base fabric with very little elongation under tension is selected, and a base material that is water resistant, oil resistant, or chemical resistant is selected. Usually, adhesives such as natural rubber, synthetic rubber, or synthetic resin are applied to cloth-like materials such as cotton cloth, linen cloth, or synthetic fiber cloth. A sheet-like elastic covering layer 11 made of rubber or the like is formed to protect the surface of the woven fabric and further ensure the retention of the thread-like abrasive bodies.

Next, a pair of holes 4 and 5 are continuously punched from the back side of the substrate 3 cut to a predetermined width using a punching needle, and this is cut to a fixed size.
As shown in FIG. 2B, thread-like abrasive bodies 6 bent into a substantially U-shape are implanted in the pair of holes 4 and 5 and firmly fixed to the substrate 3 to form a desired abrasive base material. The U-shaped filament abrasive body 6 is at least one in number, and may be one as shown in FIG. 3A or (a), (b), ( c) A coating layer 2 made of a high molecular weight polymer is provided on a thread-like filament 1 made by bundling a plurality of filaments. FIG. 4 is a back plan view of the polishing base material, and FIG. 5 is a sectional view taken along the line X--X in FIG. 4. In FIG. 5, numeral 7 indicates a U-shaped corner portion of the thread-like abrasive body.

Incidentally, it is advantageous to use a needle planting machine that is generally used in the production of textile clothing for the production of the above-mentioned abrasive base material.

When using the above-mentioned abrasive base material as an abrasive,
A solvent that does not dissolve the polymer constituting the thread-like filament 1 but can dissolve only the coating layer 2 of the polymer is selected and applied. Generally, filaments made of nylon 6, nylon 66, polyester, etc. mixed with abrasive grains 12 are used as the polymer of thread-like filament 1 that is commonly used. is styrene, acetate,
Polyvinyl alcohol resin or the like is used. Regarding the selection of the solvent, a solvent such as toluene, acetone, water, etc., which does not dissolve the thread-like filament 1 but only dissolves the coating layer 2 of the polymer, is used. and,
By appropriately selecting the coated polymer and the solvent for eluting it, a portion of the eluted polymer permeates into the substrate 3, reinforcing the substrate 3 and also strengthening the thread-like abrasive body 6. It can be held firmly.
As shown in FIG. 6, the elastic filament-like abrasive material produced as described above has its bottom 8 in close contact with the substrate, and the tips 9 of the filament filaments of the abrasive material are aligned completely evenly without any unevenness. The insertion portion 10 of the filament filament into the substrate is firmly fixed and will not come off.

An example of implementation will be described to further specifically explain the present invention.

That is, three thread-like filaments 1 of nylon filaments with a diameter of 0.3 mm spun with abrasive grain Alundum #500 mixed in at a ratio of about 20% by weight are aligned, and an extruder is used to apply styrene resin to the outer surface of the filament 1 to a thickness of
The thread-like abrasive body 6 coated with a thickness of 0.02 mm to form a coating layer 2 was implanted on a substrate 3 on which seven sheets of 0.5 mm thick twill cotton cloth were laminated.

The adhesive used to bond the substrates was NBR (trade name: Hy Car-1052, manufactured by Nippon Zeon Co., Ltd.) containing sulfur and other chemicals dissolved in trichlene.

Then, the solvent was expelled and the vulcanized substrate 3 was heated to a width of 40 mm.
After cutting into pieces of mm, the thread-like abrasive body 6 is cut into a U-shaped section with a width of 6 mm using a carding machine's needle-planting machine. The coating layer was dissolved while pouring toluene at a temperature of 60° C. onto the clustered surface of the abrasive body 6, and after drying, it was spirally wound on a 200 mmφ wooden roll. This product was used for rough polishing of drums, etc. before plating, but just by making contact with the drum and rotating it in the opposite direction, it was possible to polish uniformly with no unevenness in the width direction, reducing the time required and providing excellent polishing. It worked.

Therefore, when the present invention is configured as described above, it is possible to accurately implant the implant without wearing out the implanting device portion, and the workability thereof can be greatly improved. In addition, even when used as an abrasive, the substrate does not expand or contract, and the eluted polymer permeates into the substrate, reinforcing the substrate and firmly holding the filaments, so they do not fall out and have elasticity. Since a substrate is used, it can be spirally wound around a roller body and used as a polishing roll, and objects to be polished having flat, uneven, or curved surfaces can be effectively and uniformly polished. Furthermore, since planting is easy, the planting angle can be easily adjusted according to the purpose and use of the object to be polished, such as the size of scratches on the polished surface and the size of the object being polished. It has advantages such as good polishing and excellent polishing effect.

[Brief explanation of the drawing]

Figure 1 is an enlarged sectional view of the main part of the filament.
Figure 2 is an enlarged cross-sectional view of the main part of the thread-like abrasive body, Figure 3 is a cross-sectional view of one thread-like abrasive body and multiple thread-like abrasive bodies formed into a U-shape, respectively, and Figure 4 is the back side of the abrasive base material. A plan view, FIG. 5 is a sectional view taken along the line X-X in FIG. 4,
FIGS. 6A and 6B are cross-sectional views of an abrasive material using the elastic thread-like abrasive material of the present invention. 1... Thread-like filament, 2... Covering layer, 3...
... Substrate, 4, 5 ... Hole, 6 ... Thread-like abrasive body, 7,
8... U-shaped corner portion, 9... Tip portion of filamentous filament, 10... Insertion portion of filamentous filament, 11... Elastic coating layer, 12... Abrasive grain.

Claims (1)

[Scope of utility model registration request] Elasticity made by pasting a natural or synthetic rubber sheet on one side of a laminate made by bonding multiple layers of cloth-like materials such as cotton cloth, linen cloth, synthetic fiber cloth, etc. together with a rubber or synthetic resin adhesive. The filament-like abrasive body has a coating layer of a high-molecular-weight polymer that can be eluted on the outer surface of a filament made of synthetic resin mixed with abrasive grains on the substrate.
An elastic filament abrasive material in which a plurality of elastic filament abrasives are implanted in a letter shape, and an elastic substrate and a filament abrasive body are fixed together by elution of the above-mentioned coating layer.