JPH0349909Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a sheet used for electronic blackboards, whiteboards, etc., that is, a sheet having a surface that can be repeatedly written and erased with a predetermined marker, and is used between two reels. This relates to a long sheet whose writing surface can be positioned within a predetermined frame by winding and unwinding the sheet or by moving the looped sheet.

PRIOR ART In recent years, in the field of educational stationery, white boards or sheets that do not require the use of chalk like traditional blackboards and can be used to write and erase writing have overcome the drawbacks of traditional blackboards where hands are stained with chalk powder. Electronic blackboards are becoming more and more popular as electronic blackboards, in particular, because they can reduce and copy information written on the writing surface of a white electronic blackboard (whiteboard) sheet on the spot. When using it in a seminar, there is no need to take notes each time.
It is prized for its ability to increase the efficiency of meetings, etc.

A typical structural example thereof will be explained with reference to FIG. On the front part surrounded by a frame 7 with an operation panel 6 attached to the pedestal 5, a metal plate such as aluminum or iron or a wooden plate such as plywood or hardboard (electronic A board 3 is provided with high-quality paper for cosmetic purposes pasted on the back side of the blackboard (whiteboard) sheet, and a pair of guide rollers 4a and 4b are arranged on both the left and right sides of this board, and an electronic A pair of reels 2a around which both ends of a blackboard (whiteboard) sheet 1 are wound,
2b, and the electronic whiteboard (whiteboard) sheet 1 is passed over guide rollers 4a, 4b so as to be in contact with the surface of the board 3. By operating the operation panel 6, the electronic blackboard (whiteboard) sheet 1 is Any part of the board remains on the surface of the board. Note that 8 is a back plate that shields the back space of the frame 7.

FIG. 3 is a top view of the electronic blackboard (whiteboard) sheet 1 configured in an endless loop, and the guide roller 4c is replaced by the winding reel in FIG. 2.
The drive roller 4d is used, and the other parts can be configured and used in the same manner as in FIG. 2. As shown in FIG. 4, the structure of the electronic blackboard (whiteboard) sheet used for this purpose is as follows: a support layer 11 made of a milky white polyester film, a transparent polyester film having a white pigment layer, white coated paper, etc.;
A writable and erasable resin layer 1 made of a transparent fluorine film, a plastic film having a poultice layer of fluorine or silicone resin, or a polypropylene or polyethylene film without a poultice layer.
2 are integrated by bonding them together by heating, pressure bonding, or other means.

Note that the surface roughness (Rz) of the surface of the high-quality cosmetic paper attached to the surface of the board is specified in JIS B 0601.
It is 10-20μm.

Problems to be improved by the invention As shown in Fig. 4, the exposed surface of the back side of the support that the board contacts is smooth in the conventional sheet for electronic blackboards (whiteboards), and the surface roughness specified in JIS B 0601 is low. Since the radius (Rz) is 0.6 to 3 μm, the contact resistance (frictional resistance) with the board is large, and when the sheet is moved electrically, it has poor running performance on the board surface, and the adhesion to the contact surface is particularly poor. This tendency will only increase if antistatic agents are not applied to improve this.
This tended to hinder the smooth running of the seat.

Means for Solving the Problems The present invention solves the above problems, and its outline is that by roughening the back surface of the support, when the electronic blackboard (whiteboard) sheet is running, It reduces the contact resistance with the board, especially the degree of roughness is the surface roughness (Rz) according to JIS B 0601.
Very good results were obtained when the thickness was 10 μm or more.

Embodiment FIG. 1 shows an embodiment of the electronic blackboard (whiteboard) sheet of the present invention. A is a writable and erasable resin layer 12 and a support 11 bonded 15, and the back surface of the support 11 is roughened 13. is applied to form an electronic blackboard (whiteboard) sheet.

In B, the writable and erasable resin layer 12 and the support 11 are bonded 15, and on the back side of the support 11, another base film 14 is roughened on one side and the roughened surface is removed. Support 11 and joint 1
5, an electronic whiteboard (whiteboard) sheet is constructed.

In C, a porous woven fabric 16 is pasted on the back surface of the support 11 and bonded 15 to form a rough surface to form a writing sheet. The surface of a porous woven fabric is equivalent to a roughened surface. Although not shown, rough surface finishing can be done by printing grains, stripes, etc. on the rough surface using printing methods such as embossing, silk printing, and gravure printing, or by coating resin or a mixture of resin and pigment in stripes. This can be done by spraying, and it is also possible to roughen the surface by using foaming ink and heating and foaming the ink applied as a poultice, and the roughening method is not limited. .

The surface roughness of the roughened surface of the above example is
(Rz) specified in JIS B 0601 is 10 μm or more, and when this electronic blackboard (whiteboard) sheet was installed and put into practical use, the running properties were extremely good.

Effects of the invention In the case of the invention, the back surface of the support, that is, the surface in contact with the board, is roughened to form a rough surface, so even when the electronic blackboard (whiteboard) sheet is run, the frictional resistance is reduced. , it is possible to realize smooth running.

[Brief explanation of the drawing]

Figure 1 shows a long electronic blackboard (whiteboard) according to the present invention.
2 is a perspective view showing an example of an electronic blackboard with the ceiling open; FIG. 3 is a partial top view of the electronic blackboard (whiteboard) sheet in a loop shape; FIG. 4 is a sectional view showing an example of a conventional electronic whiteboard (whiteboard) sheet. 1...Sheet for electronic blackboard (whiteboard), 2a, 2b
... Reel, 3 ... Board, 4a, 4b guide roller, 4c ... Guide roller, 4d ... Drive roller, 5 ... Frame, 6 ... Operation panel, 7 ... Frame, 8 ... Back plate, 11 ...Support, 12...
Writable and erasable resin layer, 13... Rough surface processing, 14
... Base film, 15 ... Bonding, 16 ... Porous woven fabric.

Claims (1)

[Scope of utility model registration request] In an electronic blackboard sheet in which a writable and erasable resin layer is bonded to the surface of a support, the exposed surface on the back of the support is roughened to a surface roughness (Rz) of 10 μm or more as defined in JIS B 0601. An electronic blackboard sheet characterized by: