JPH0630996Y2 - Synthetic resin plate - Google Patents

Description

TECHNICAL FIELD The present invention relates to a synthetic resin plate, particularly a transparent or translucent synthetic resin plate mainly used for outdoor building materials.

Conventional technology and its problems Conventionally, as a building material for outdoor use such as a daylighting dome and a daylighting roof, from the viewpoint of high transparency, good workability, low cost, etc. Translucent synthetic resin plates are often used.

These synthetic resin plates are often subjected to processing such as cutting and bending at the time of construction, but in order to accurately determine the processing position, a marking line, that is, a marking line, is formed by using oil-based ink on the plate surface. Lines are often added. In addition, in order to correctly set the overlapping width of the edge portions of the adjacent synthetic resin plates at the time of construction, for example, to make it possible to easily and correctly set the number of overlapping mountains of the edge portions in the construction of the corrugated sheet. , Marks may be attached to the edge along the ridgeline of the mountain parallel to it.

However, in practice, marking the surface of the synthetic resin plate on the surface of a processing site or a construction site is not only troublesome but also dangerous especially on a building. In addition, it is desirable to remove the above-mentioned marked lines by wiping off after processing or construction, but such work is not only troublesome, but the work is often difficult after construction. There was a problem that the appearance of the daylighting dome or the daylighting roof was significantly impaired due to the contamination of the plate surface due to the remaining lines or incomplete wiping.

Also, in order to prevent scratches and contamination on the surface of the synthetic resin plate, preprint a marked line on the surface of the protective film that is generally used, and attach this to the surface of the synthetic resin plate for processing and construction. Attempts have been made to make the work easier, but there are drawbacks such that the synthetic resin plate and the protective film are misaligned with each other, or the protective film is peeled off during the work to make the position determination incorrect.

An object of the present invention is to provide a synthetic resin plate that solves the above problems all at once.

Means for Solving the Problems For the above-mentioned purpose, the present invention is preferably such that a synthetic resin plate is preliminarily marked with a marked line, and in particular, the marked line cannot be naturally viewed after construction. By providing a synthetic resin plate that is erasable, it is possible to provide a synthetic resin plate that is advantageous in terms of workability such as construction and processing.

That is, the present invention comprises a transparent or semi-transparent synthetic resin plate, and at a predetermined position on the surface thereof, a fading colorant that fades to a visually invisible or difficult state over time when exposed to sunlight. Or a synthetic resin plate characterized in that a plurality of lines of fading marks are formed by coating.

As the synthetic resin plate, a transparent or translucent plate made of a usual thermoplastic resin such as polyvinyl chloride resin, polymethylmethacrylate resin, or polycarbonate resin is used. In addition to the flat plate, the resin plate includes a so-called corrugated plate having a wavy or angular wavy cross section. In the case of the corrugated plate, the fading mark is
In order to give distinctiveness to the front and back and also to easily identify the number of peaks to be overlapped on the side edge of the adjacent corrugated plate at the time of construction, at least one side edge of the above peak It is preferable to provide it in parallel with the ridgeline of.

Further, the manner of forming the fading marker line is not particularly limited, and it may be formed as an intermittent line such as a continuous line, a dotted line, or a chain line. Furthermore, in order to have the marking of the material of the product, display of origin, advertising function, etc., the marking may be one or a combination of two or more of letters, symbols and figures. It may be configured by a list display by.

The fading colorant used for the formation of the marked line does not discolor in an early stage in the environment shielded from the sun rays, and when exposed to the sun rays, it has a relatively short period, preferably within several tens of hours. The color disappears and becomes transparent, or the color fades and loses the original color and becomes the same as the color of the synthetic resin plate, and in any case, there is a property that visual appearance is completely or almost impossible. It means a colorant which has, and in short, an ink using a colorant having extremely low light resistance itself is used. Other than the use of such a colorant having extremely low light resistance, it may have the same composition as that of a usual printing ink or a writing instrument ink,
An oil-based type or an organic solvent type is preferably used because of good spreadability on the resin plate. By the way, as a medium used for the fading colorant, for example, gum rosin,
Examples thereof include copal resin, phenol resin, rosin-modified phenol resin, and the like. Solvents include aliphatic and / or alicyclic hydrocarbons such as n-hexane, n-peptane, n-paraffin, and cyclohexane, ethanol, propanol. , Alcohols such as butanol, cellosolves such as methyl cellosolve, ethyl cellosolve and propyl cellosolve, carbitols such as methylcarbitol and ethylcarbitol, and aromatic hydrocarbons such as toluene and xylene. . Needless to say, addition of various additives is allowed as necessary, but addition of an additive that inhibits fading, especially an ultraviolet absorber that is often used for improving light resistance. Is harmful in this invention and shall not be used.

As the fading colorant, an organic dye is mainly used, and among them, basic azo dyes, diphenylmethane, carbonium dyes such as triphenylmethane are bright in color and have high coloring power, and further have light resistance. Since it is low, it is preferably used. Further, when the fading colorant is recognized as a marked line, it is possible to use a fluorescent dye alone or in combination with the above dye in order to make it more visible.

Action The synthetic resin plate according to the present invention can be used as a reference line for positioning during processing or construction such as bending and cutting with a marked line provided at an appropriate position on its surface. On the other hand, when exposed to sunlight after construction, the discolorable colorant deteriorates and discolors or disappears over time. As a result, the marked lines are visually invisible.

Example FIG. 1 and FIG. 2 show an example in the case of using a synthetic resin corrugated sheet. On the surface of one side end of the synthetic resin sheet (1) made of the corrugated sheet, three pieces from the edge are shown. Mountain part of the eye (1
Along the ridge line of a), a fading colorant (2) is formed by printing in a thick dotted line by a fading colorant. Therefore, when this corrugated sheet is used, the surface on the side of the marked line can be used as the front side to prevent the wrong installation of the front side and the back side. ′) Is the mountain part (1
The overlap width can be easily and surely made uniform by covering the second peak next to (a) so as to cover the peak at the endmost edge. Of course, a similar reference line is formed in a direction orthogonal to the mountain portion (1a), and a reference line when the corrugated plates adjacent in the ridgeline direction of the mountain portion (1a) are attached and installed in a partially overlapping state. May be used as.

FIG. 3 shows an embodiment in which a flat synthetic resin plate (11) is used. The synthetic resin plate (11) is constituted by sticking a protective film (11b) for improving the weather resistance on the surface of the plate-shaped main body (11a), and on the surface on the protective film (11b) side, A plurality of continuous and linear fading marks (12) are provided in parallel with the fading colorant at a position near one side end. When such a synthetic resin plate (11) having the protective film (11b) is applied with the front and back reversed, the protective film (11b) cannot obtain the effect of improving the weather resistance. In many cases, a label is attached to the surface to indicate the protective film (11b) side. However, in the synthetic resin plate provided with the marked line (12) according to the present invention, the marked line (12) should be used to distinguish between the front and back. Is possible,
It is not necessary to attach the above label. Moreover, when a label is applied and the synthetic resin plate is removed by cutting at the applied part, it becomes difficult to distinguish between the front and back sides, or it is necessary to peel off the label after construction. In the synthetic resin plate (11) having (12), those inconveniences and troubles can be eliminated. The marked line (12) can also be used as a reference line when the synthetic resin plate (11) is cut or bent, and as in the case of the corrugated plate, the end edges thereof are overlapped and adjacent to each other. When it is installed in the connected state with the synthetic resin plate, it can be effectively used as a reference line for setting the overlapping width. Of course, the marked line (12) will be discolored within a short period of time by being exposed to sunlight after the construction, and it will be substantially erased.

FIG. 4 shows an example in which the marked line (22) is formed by a linear array of characters (22a) such as a trademark. In this case, the marked line (22) not only has the functions of identifying the front and back sides as described above, the reference line for processing and construction, but also has the function of displaying the material of the product, the source, etc., and also the advertising function. It is even more beneficial in what you can do.

Next, specific examples of the fading colorant used for forming the fading marks (2), (12) and (22) and the results of the experiment for confirming the fading property will be shown.

The following three types of ink were prepared as fading colorants.

[Ink composition]

Example 1-CI basic blue # 1 20 parts by weight ("Primocyanine 6GX" manufactured by Sumitomo Chemical Co., Ltd.)-Gum rosin 15 parts by weight-Methyl cellosolve 80 parts by weight Example 2-CI basic yellow # 2 15 parts by weight-Gum rosin 10 parts by weight Parts-methyl cellosolve 50 parts by weight-isobutanol 65 parts by weight-orthophenylene diamine 1 part by weight Example 3-CI basic violet # 10 20 parts by weight-benzyl alcohol 25 parts by weight-ethylene glycol phenyl ether 40 parts by weight-cyclohexanone / formalin Condensate 15 parts by weight Ethyl cellulose 10 parts by weight Using each of the inks of Examples 1 to 3 above, by handwriting, on the surface of a colorless and transparent polycarbonate resin plate having a thickness of 1 mm,
A continuous marking line having a width of 3.0 mm was formed.

However, the marked lines were bright blue, yellow, and purple, respectively.

Then, when the sample plates with the marked lines were left in a normal room where direct sunlight was not exposed for one month, almost no change was observed in the color tone and the visibility of each marked line.

On the other hand, each sample similar to the above was exposed to a weather meter (manufactured by Suga Test Instruments Co., Ltd.) for 40 hours in accordance with JIS A1415, and then the change state of each marked line was visually inspected. As a result, although a slight difference was recognized, the fading of the marked lines was remarkable in all the samples, and the appearance was almost invisible, and the uniform transparency of the synthetic resin plate was observed. It could be confirmed that the state was changed to almost no inhibition.

Effect of the Invention The synthetic resin plate according to the present invention has a marked line on the surface, so that by forming it at a predetermined position, it can be used as a reference line when processing such as bending and cutting. Not only can the processing be performed accurately by using it, but also when the frame is installed and constructed as a building board, the front and back identifications, the mounting and fixing parts, and the overlapping width for overlapping the edges can be used. It can be used for display etc. so that construction can be performed accurately and easily.

Moreover, the marked line is formed with a fading colorant,
Since it is said that it will fade over time when exposed to sunlight, there is no need to wipe it off after mounting, it can be erased naturally or it can be in a state that is almost visually invisible. In the meantime, it can be quite comparable in appearance.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing one embodiment of the present invention when a synthetic resin corrugated sheet is used, FIG. 2 is a partial sectional view thereof, and FIG. 3 has a protective film on the surface. FIG. 4 is a perspective view showing an embodiment in the case of using a flat plate-shaped synthetic resin plate, and FIG. 4 is a plan view showing a modified example of a marked line forming mode. (1) (11) …… Synthetic resin plate, (2) (12) (22) ……
Mark line.

Claims (5)

[Scope of utility model registration request] 1. A transparent or semi-transparent synthetic resin plate, and a predetermined color on the surface thereof, which comprises a fading colorant which fades to a visually invisible or difficult state over time when exposed to sunlight. A synthetic resin plate, characterized in that a plurality of fading marks are formed by coating. 2. A corrugated plate having a corrugated cross section, and at least one side end of the corrugated plate is provided with a fading mark parallel to a ridge line of a mountain portion. Synthetic resin plate. 3. The synthetic resin plate according to claim 1 or 2, wherein the fading marking line comprises a list display of one or a combination of two or more of characters, symbols and figures. 4. The synthetic resin plate according to claim 1, wherein the fading colorant is an oil-based or organic solvent-based printing ink. 5. The fading colorant contains one or more colorants selected from a basic azo dye, a carbonium dye and a fluorescent dye, and any one of claims (1) to (4).
The synthetic resin plate according to.