JPH0484925A - Wiping cloth - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a wiping cloth.

The wiping cloth provided by the present invention is particularly suitable for use as an optical disk cleaner.

[Prior Art] Natural fiber felt or velvet is generally used as a wiping cloth. When these wiping cloths are used as optical disk cleaners for compact disks, laser disks, magneto-optical disks, etc., a problem arises in that they cause scratches on the substrate surface. To solve this problem, wiping cloths made of chamois leather, nonwoven fabric, artificial leather, synthetic leather, etc. are used as optical disk cleaners. It is also known to use a wiping cloth together with a cleaning solution containing a surfactant or an organic solvent.

[Problems to be Solved by the Invention] In optical disk cleaners made of natural fibers, in addition to scratches on the substrate surface, fiber fluffs occur, which adhere to the substrate surface and leave stains. There is a problem. Optical disk cleaners made of chamois leather, artificial leather, or synthetic leather have a problem in that white powder or scum is generated due to the influence of humidity and stains remain.

Furthermore, when an optical disk cleaner made of non-woven fabric is used for an optical disk having low hardness, such as one on which the surface of the substrate is not coated with a hard coat, a problem arises in that scratches occur on the surface of the substrate.

Japanese Utility Model Publication No. 63-71859 discloses that an antifouling agent is contained in a raised sheet-like material in which a base fabric made of knitted or woven fabric and ultrafine acrylic fibers intertwined with the base fabric are integrated with a water-based binder. A cleaner bath is described. Even when this cleaning cloth is used for optical discs, there is a problem in that it causes scratches on the surface of the substrate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a wiping cloth that can wipe away dirt adhering to the surface of a substrate such as an optical disk without causing scratches on the surface of the substrate.

[Means for Solving the Problems] According to the present invention, the above object consists of fibers of 1 denier or less, with a gauge number in the range of 10 to 50 and 0.8 to
This is achieved by providing a wiping cloth characterized in that it consists of a knitted fabric with a cover factor in the range of 1.65.

The above gauge number represents the density of the needles of the knitting machine, and the above cover factor is expressed by the following formula % formula % (in the formula, K represents the cover factor) shown in Fiber Handbook Processing Edition, page 381 (Maruzen). , n represents the number of warp yarns per inch, and N represents the cotton count of the yarn.) represents the ratio of the area occupied by the yarn to the area of the knitted fabric.

If the gauge number of the wiping cloth is less than 10 or the cover factor is less than 0.8, wiping residue is likely to occur; If it is large, scratches are likely to occur on the surface of the optical disc substrate.

When using a wiping cloth made of fibers with a single filament fineness of more than 1 denier, there will be some residue left after wiping and the cloth will become loose. The single fiber fineness of the fibers constituting the wiping cloth is preferably 0.5 denier or less. The fibers used include those made of polyester, acrylic, nylon, etc., and those having a long fiber (filament) structure are preferred.

[Function] The wiping cloth of the present invention has many microscopic gaps between the fibers, and is capable of retaining dirt that has been scraped off.Moreover, the voids of the knitted fabric prevent dirt from relatively large powder particles. It is also possible to incorporate and retain the information into the body.

[Example] Hereinafter, the present invention will be specifically explained with reference to Examples.

Example 1 Using polycarbonate resin (manufactured by Mitsubishi Gas Chemical Co., Ltd., trade name: Nipiron), which is widely used as an optical disc substrate material, a disk-shaped substrate having a diameter of +30 mm and a thickness of 1.2 mm was prepared. Created. Test dust (,115-
The test dust shown in No. Z-8901 (with a silica sand center diameter in the range of 27 to 31 μl) was dispersed in distilled water and applied to the above substrate. Using an optical disc cleaner made of a knitted fabric made of 0.5 denier ultra-fine polyester long fibers with a gauge number of 32 and a cover factor of 1.35, the above substrate surface was subjected to a load of 20
Wiped 3 times with 0g. As a result, the test dust was completely wiped off, and no scratches were caused on the substrate surface.

Similar tests were conducted using acrylic resin, epoxy resin, olefin resin, or glass instead of polycarbonate resin as the optical disc substrate material, and in both cases, the test dust was completely wiped off, and there were no scratches on the substrate surface.

Comparative Example 1 A test similar to that in Example I was conducted using an optical disc cleaner made of a knitted fabric made of 0.5 denier ultrafine polyester long fibers with a gauge number of 5 and a cover factor of 0.7. There was some residue left after wiping.

Comparative Example 2 When the same test as in Example 1 was conducted using an optical disk cleaner made of a knitted fabric made of 0.5 denier ultrafine polyester long fibers and having a gauge number of 32 and a cover factor of 2.0, the substrate surface A wound occurred.

U Effects of the Invention By using the wiping cloth of the present invention, it is possible to wipe away dirt adhering to the surface of a substrate such as an optical disk, without causing scratches on the surface of the substrate.

Claims (1)

[Claims] A wiping cloth comprising a knitted fabric made of fibers of 1 denier or less and having a gauge number in the range of 10 to 50 and a cover factor in the range of 0.8 to 1.65.