JPS6356074B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved whiteboard eraser, and more specifically, to a whiteboard eraser that has excellent erasing properties and suppresses dust generation.

A whiteboard is an alternative to the traditional blackboard in schools.
It is a writing board widely used in factories, hospitals, homes, etc., and is usually made of hard enamel, thermosetting resin, or thermoplastic resin, and the desired markings are marked on the surface with a whiteboard marker. This marker writing can be erased with a whiteboard eraser.
This marker is a rod-shaped container made of polyethylene, such as a cap, a body, and a tail plug, containing ink.The ink contains pigments to color handwriting, resin to form handwriting as a continuous film, and pigments and resin It consists of a solvent for transporting liquids, etc. from a stick-shaped container to the whiteboard surface. By the way, the writing made on the board surface with a marker becomes a continuous film as the solvent evaporates and is held on the board surface, but this writing film is removed from the board surface by a special additive added to the ink. The writing film is in a raised state and is easily removed from the board surface when wiped with an eraser.

By the way, in the case of a liquid type marker, in which the ink is directly stored in the ink chamber in the body of a rod-shaped container, it is easier to write than a filled type marker, in which the ink is absorbed into a porous material housed in the body. Since a large amount of ink comes out on the whiteboard surface, the writing itself is rich and clear, but when erasing the writing, there is a large amount of pigment and resin on the board surface, which can contaminate the eraser. This has the disadvantage that the writing and erasing properties of the eraser are lost in a relatively short period of time. Erasers with poor erasing properties are often used without being cleaned, and when such erasers are continued to be used, dirt such as resin attached to the erasing surface of the eraser is transferred to the board surface and erased. In addition, the writing on the board surface is simply peeled off from the board surface and is not captured by the eraser, and the pigments, resins, etc. of the ink components are scattered into the air as dust. Contamination problems are occurring especially in computer rooms, hospitals, cafeterias, precision machinery factories, etc. that require a clean environment.

The present invention relates to an improved eraser for whiteboards that solves the above-mentioned drawbacks and problems, and the purpose of the present invention is to eliminate the use of markers that apply a relatively large amount of ink to the board when writing on the board.
It is an object of the present invention to provide an eraser for a whiteboard, which exhibits excellent erasing properties over a long period of time for writing formed on a whiteboard with a liquid marker, for example, and which significantly suppresses dust generation.

In order to achieve the above object, the present inventors conducted a lot of research on the configuration of the cleaning surface of the eraser, created a whiteboard eraser with excellent continuous erasing performance and dust capture performance, and completed the present invention. I came to the conclusion.

The whiteboard eraser according to the present invention includes:
200 to 1000 single yarns with 20 to 80 filaments/
It is made of pile fabric woven at a density of square inches, and is characterized in that the height of the single yarn from the base fabric surface is 2 to 10 mm.

The single yarn constituting the pile fabric used in the eraser of the present invention contains 20 to 20 filaments belonging to long fibers.
The yarn, which is made of 80 strands and has a filament number in this range, is hard and has high tensile strength. The dust is finely pulverized by the thread, and is captured in the gaps between each single thread by the brush return phenomenon of the single threads as they pass through the handwriting, thereby preventing dust from scattering. Furthermore, since the single yarns do not fall down completely, clogging due to dust does not occur, and durable erasability can be obtained. If a twisted single yarn with less than 20 filaments is used, the yarn will completely collapse when rubbed against the board surface, producing flake-like dust, making it impossible to obtain satisfactory erasability. Further, a twisted single yarn having 80 or more filaments is not preferable because it is too hard and warps, causing dust to scatter and causing scratches on the board surface.

Note that the diameter of each filament is preferably about 17.5 denier. Therefore, the diameter (thickness) of the single yarn formed by twisting 20 to 80 filaments in the present invention is preferably about 350 to 1400 deniers.

The density of the single yarn group in the pile fabric of the present invention is
200 to 1000 lines/square inch, low density of 200 lines/square inch or less results in poor erasability and poor dust capture ability, and high density of 1000 lines/square inch or higher erases good. However, this is not preferable because dust will not be captured. The height of the single yarns forming the pile fabric from the base fabric surface is also an important factor for erasability and dust capture performance, and this height is preferably 2 to 10 mm, and clogging is likely to occur if it is less than 2 mm. At an early stage, the ability to capture dust almost disappears,
If it is 10 mm or more, the single yarn collapse and brush return phenomenon become noticeable, and erasability and dust capture performance deteriorate.

The present invention will be explained in more detail below using Examples.

Example: Single nylon yarn (840 denier) consisting of 48 nylon filaments is implanted into a white cotton base fabric at a density of 22 filaments/inch in the transverse direction and 31 filaments/inch in the longitudinal direction, resulting in a single yarn density of 682 filaments. / square inch of nylon pile fabric was woven. The height of the single yarn of this pile fabric from the base fabric surface was 6 mm. Glue this fabric piece onto the eraser base with latex,
An eraser with an erasing surface of 50 mm x 135 mm was manufactured. On the other hand, the red marker (manufactured by Pilot Manten Pen Co., Ltd., product name "WBMA-L") is 90cm x 180cm.
The writing was written on the entire surface of the whiteboard, and the writing was erased using the eraser manufactured earlier. This eraser had excellent erasing properties and good dust-capturing properties, and clogging occurred after erasing 90 surfaces of the writing board. On the other hand, the writing board was erased using a commercial whiteboard eraser made of pile fabric that did not meet the conditions according to the present invention, but clogging had already occurred when 30 surfaces of the board were erased.
Further, the scattering of dust was about 5 times that when erasing with the eraser of the present invention.

Claims (1)

[Claims] 1 200 to 1000 single yarns with 20 to 80 filaments
A razor for a whiteboard, characterized in that it is made of a pile fabric woven at a density of threads per square inch, and the height of the single threads from the surface of the base fabric is 2 to 10 mm.