JPS6023187Y2 - marker board - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a marker board.

2. Description of the Related Art Conventionally, blackboards, whiteboards, and the like have been commonly used as writing boards for displaying information to a large number of people in classrooms, conferences, and the like.

By the way, since the above-mentioned blackboard uses chalk, not only does the chalk powder adhere to the scribe's hands and clothes, but also the chalk powder scatters when erasing, making it unhygienic.Also, the white board does not have the above-mentioned problems. On the other hand, a special marker pen must be used so that the written information can be erased later, and if an oil-based felt tip pen or the like is used to write inadvertently, it cannot be easily erased.

In view of the above, this invention was made with the aim of providing a marker board that can be written on using any writing utensil and that can be easily erased.
It is characterized in that an ultra-high molecular weight polyethylene film of 00,000 to 1,000,000 is laminated onto a rigid substrate.

Next, this invention will be explained using examples.

FIG. 1 is an enlarged sectional view of a main part of an embodiment of this invention.

Marker board A of this invention has a molecular weight of 100,000 to 100
An ultra-high molecular weight polyethylene film 1 having a molecular weight of 1,000,000, preferably 300,000 to 500,000, is laminated onto a rigid substrate 2 such as a plywood board or a synthetic resin board.

In the above, the molecular weight of polyethylene is 100,000 to 100
The reason for limiting the molecular weight to 10,000 is that if the molecular weight is less than 100,000, it will be difficult to erase with an oil-based felt-tip pen, similar to a conventional white board, and if it is more than 1,000,000, the erasability will be good but manufacturing will be difficult. In addition, since it exhibits more than necessary and sufficient effect on erasability, it is not necessary. Taking these into consideration, it is recommended that the molecular weight is about 100,000 to 1,000,000, preferably 300,000 to 500,000. Become.

FIG. 2 is a sectional view of another embodiment, in which iron foil 3 is attached to the substrate 2.
A material that can attract magnets, such as magnets, is attached.

When configured in this way, it is possible to temporarily fix papers or sheets such as memos on the marker board A using a magnet, which is convenient.

In the above embodiment, if a material that attracts magnets such as iron foil 3 is integrally attached to the polyethylene film 1 side, and this is attached onto a substrate 2 having arbitrary rigidity, it is possible to use a structure that is conventionally used. It is convenient because it can be pasted onto other boards, making it compatible.

Since this device is constructed as described above, it is possible to easily erase any writing made on the polyethylene film 1 of the marker board A with any type of felt-tip pen, regardless of whether it is water-based or oil-based. There is no need to consider the adaptability of the marking device, making it more convenient to use.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view of a main part of an embodiment, and FIG. 2 is an enlarged sectional view of a main part of another embodiment. A... Marker board, 1... Polyethylene film, 2... Rigid substrate.

Claims (2)

[Scope of utility model registration request] (1) A marker board characterized in that an ultra-high molecular weight polyethylene film with a molecular weight of 100,000 to 1,000,000 is laminated onto a rigid substrate. (2) The marker board according to claim 1, wherein the substrate has a function of attracting a magnet.