JPH06155310A - Nonwoven cloth polishing material - Google Patents

Abstract

PURPOSE:To restrain generation of static electricity at the time of polishing work containing a specified proportion of a metal plated synthetic fiber having specified resistivity value in a polishing base material concerning a nonwoven cloth polishing material with abrasive grains adhered on a fibrous base material. CONSTITUTION:By containing at least 3 weight % of a metal plated synthetic fiber having resistivity value of 1.0X10<-3>-1.0X10<-2>OMEGA.cm on a polishing base material of a nonwoven cloth polishing material, generation of static electricity due to its use is restrained. Concretely, by sprinkling SBR as a primary binder on both surfaces of a random wear having 85g/m<2> of a nylon fiber 1 and 5g/m<2> of a silver plated nylon fiber 2 covered with 20% weight % of silver and heating and drying it, a fibrous base material is acquired. Thereafter, by impregnating this fibrous base material in a secondary binder containing silicon carbide polishing abrasive grains 4 in thermosetting resin 3, and drying and binding it, a desired nonwoven cloth abrasive 5 is manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-woven fabric abrasive used for grinding and polishing metal materials, synthetic resin materials, wood, stones and the like.

[0002]

2. Description of the Related Art Conventionally, as a non-woven fabric abrasive material, a bulky non-woven fabric substrate mainly made of synthetic fiber is impregnated with a thermosetting resin binder containing abrasive grains, and the abrasive grains are used as a substrate. It is known that it is configured by fixing, wet polishing,
It is widely used for grinding and polishing metal materials, synthetic resin materials, wood, stone materials, etc. regardless of dry polishing.

[0003]

In the above-mentioned conventional non-woven fabric abrasive material, since the fibers and the abrasive grain binder constituting the non-woven fabric substrate are made of synthetic resin, for example, when the synthetic resin material is dry-polished as the work material. There is a problem that static electricity is generated due to friction and the electrostatic force causes the polishing powder to adhere to the surface of the work material. Therefore, after polishing, the polishing powder must be removed from the surface of the work material, and during polishing, the polishing powder enters between the work material and the non-woven fabric polishing material, causing a problem of damaging the work material. Also,
Similarly, when the metal material is dry-polished, static electricity is generated, and in this case, there is a risk that the polishing powder is ignited by corona discharge of static electricity. In addition, there was a risk of discharge to the worker.

The object of the present invention is to solve the above technical problems, and particularly to provide a non-woven fabric abrasive capable of suppressing the generation of static electricity during dry polishing of synthetic resin materials and metal materials. It is to be.

[0005]

SUMMARY OF THE INVENTION The present invention is a nonwoven fabric abrasive material in which abrasive grains are attached to a fiber substrate, wherein the fiber substrate is 1.0 × 10 ^{−3 to} 1.0 × 10 ⁻² Ω. It contains at least 3% by weight of metal-plated synthetic fiber having a specific resistance value of cm.

The specific resistance value of the metal-plated synthetic fiber is 1.
When it is less than 0 × 10 ⁻³ Ω · cm, the effect of removing static electricity is not recognized. 1.0 x 10 ^{-3 to} 1.0 x 10 ^-2 Ω · c
It is particularly preferable to use the metal-plated synthetic fiber of m in terms of effect and cost.

When the content of the metal-plated synthetic fiber in the fiber base material is less than 3% by weight, a sufficient static electricity removing effect cannot be obtained, and the content of the metal-plated synthetic fiber exceeds 10% by weight. In this case, the abrasive grains fixed to the metal-plated synthetic fiber surface by the thermosetting synthetic resin binder are separated together with the peeling of the metal-plated layer of the metal-plated synthetic fiber during polishing to polish the nonwoven fabric abrasive material, It is not preferable because the grinding performance is lowered and the cost is high.

The fiber base material is composed of a mixed fiber of the above metal-plated synthetic fiber and other synthetic fibers such as nylon, polyester, polypropylene, vinylidene chloride and acrylic fiber.

The metal-plated synthetic fiber is a synthetic fiber selected from acrylic fiber, polyester fiber, nylon fiber, aromatic polyamide fiber, etc. and is made of silver, copper, nickel or the like by electroless plating or vapor deposition plating. It is a plated metal having conductivity.

[0010]

According to the present invention, the metal-plated synthetic fiber contained in the fiber base material suppresses the generation of static electricity during dry polishing.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings.

(Example 1) Fineness 15d, fiber length 38mm
Nylon fiber (1) 85g / m ² and silver 20% by weight
5 g of coated fineness 5 d, silver-plated nylon fiber with fiber length 38 mm (specific resistance value: 1.5 × 10 ⁻³ Ω · cm) (2)
/ M ² Metropolitan on both sides of the bulk random web having a basis weight 90 g / m ² consisting of a primary binder as SBR each 15 g / m ² (styrene-butadiene latex), a total of 30 g / m
^The mixture was sprayed, dried by heating, and the effect of the resin was obtained to form a fiber base material.

Next, to a secondary binder containing 200 parts by weight of silicon carbide polishing abrasive grains (4) having a grain size of 800 mesh per 100 parts by weight of a phenol resin (3) which is a thermosetting resin, A fibrous base material was impregnated, dried and fixed to obtain a nonwoven fabric abrasive material (5) of Example 1 having an upward areal weight of 370 g / m ² .

Comparative Example 1 For comparison, a unit weight of 90 g / m 2 made of nylon fiber having a fineness of 15 d and a fiber length of 38 mm
S as the primary binder on both sides of the bulky random web of ²
Each 15 g / m ² and BR, total 30 g / m ² by spraying, to form a bulky fiber substrate.

Next, as in Example 1, a phenol resin 10 was used.
A non-woven fabric abrasive material of Comparative Example 1 having a basis weight of 370 g / m ² was obtained by impregnating a secondary binder containing 0 part by weight and 200 parts by weight of silicon carbide abrasive grains having a grain size of 800 mesh.

Using the nonwoven fabric abrasives obtained in Example 1 and Comparative Example 1 above, a polyester resin plate was polished under the following conditions. Polishing conditions Polyester resin plate: 200 m / m (W) x 500 m /
m (L) × 5 m / m (T) Nonwoven fabric abrasive material size: 100 m / m × 100 m / m Polishing pressure: 0.1 kgf / cm ² (10 kgf / 10
cm square) Polishing method: Surface polishing Stroke 200 m / m, 10
round trip

The polyester resin plate was polished under the above conditions, and the amount of static electricity generated at this time was measured at arbitrary 5 points on the polyester resin plate with a Startech voltmeter. The results at that time are shown in Table 1.

[0018]

[Table 1]

Although nylon fibers are used in this embodiment, polyester, polypropylene, vinylidene chloride and acrylic fibers may be used alone or in combination of two or more. Further, as the synthetic resin binder, NBR, PVA resin and the like may be used alone or in combination of plural kinds in addition to SBR.

[0020]

Since the present invention has the above-mentioned constitution, the metal-plated synthetic fiber suppresses the generation of static electricity during dry grinding and polishing work, adheres the polishing powder to the work material, and polishes the work material and the nonwoven fabric. It is possible to prevent damage to the work material due to entry into the material, to prevent ignition of abrasive powder due to corona discharge of generated static electricity, and to prevent damage such as electric shock to workers due to discharge. It is an invention having various excellent effects.

[Brief description of drawings]

FIG. 1 is a partially enlarged view of a main part of a nonwoven fabric abrasive material.

[Explanation of symbols]

 1 Nylon Fiber 2 Silver Plated Nylon Fiber 3 Phenolic Resin 4 Silicon Carbide Abrasive Grain 5 Nonwoven Fabric Abrasive

Claims (1)

[Claims] 1. A non-woven fabric abrasive comprising a fiber base material and abrasive grains adhered thereto, wherein the fiber base material is 1.0 × 10 ^{−3 to} 1.0.
A non-woven fabric abrasive comprising at least 3% by weight of a metal-plated synthetic fiber having a specific resistance value of × 10 ^-2 Ω · cm.