JPH055487U - Drafting paper - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Prevents the generation of air bubbles inside when left outdoors during the day. [Structure] A non-woven fabric having an internal structure in which polyolefin fibers are fibrillated and three-dimensionally randomly deposited is used as a substrate, and a cross ruled line is printed on the surface thereof.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a base paper that is used as a surface material such as a base paper for drawing in the fields of architecture and civil engineering, draws a design drawing, etc., uses it at a work site, and saves it.

[0002]

[Prior art and problems]

 Draft base papers used in the fields of construction and civil engineering are mainly taken out and used outdoors, so they are water resistant even if they get wet in the rain, that the drafts base paper does not cause curling, and it does not tear or tear. There are demands such as resistance to obstacles and static electricity even when placed in a dry place, but there was no surface material that satisfied these requirements evenly.

Recently, a non-woven fabric having a structure in which fibrillated polyolefin fibers are three-dimensionally and randomly deposited is developed, and as a paper-like substrate or base paper base, it is hard to tear, has no hygroscopicity, and is light in weight. Although it is said that the above requirements are satisfied, the results of the test show that when this is left outdoors in the daytime, the non-woven drawing base paper causes curling, and if it is left for a longer period of time, heat conduction occurs. Due to the low level, there was an obstacle that caused a change in thickness such that blisters in the form of "swelling" were locally formed by generating bubbles inside.

[0004]

[Means of solution]

 Surprisingly, it has been found that the above-mentioned obstacles can be substantially solved by uniformly printing crossed ruled lines, for example, cross-shaped grid ruled lines on one side of the non-woven fabric base paper. The properties of the ink used for printing, especially the properties of the binder, are related to the prevention of obstacles, but commonly used cyclized rubber-based rubber-based ones, chlorinated polyolefin-based ones, and special inks are used. In the case of UV curable ink and electrically conductive ink, the effect can be recognized even if there is a slight difference. That is, the rubber binder has an excellent curling prevention effect. UV curable ink is excellent in preventing the above "swelling". Crossover ruled lines include orthogonal and crossed ruled lines, and if the mesh is smaller than about 1 cm and is uniform over the entire surface, almost the object can be achieved.

Although it is difficult to explain the mechanism or action in which the above effects are exhibited by the surface printing, as described above, the nonwoven fabric targeted by the present invention has a three-dimensional structure obtained by fibrillating polyolefin fibers. Although it has a randomly deposited internal structure, the fibril adhesion is strong in the front and back surface layers (A in FIG. 3), and the fibril adhesion is stronger in the inner central layer (B in FIG. 3) than in the surface layer. Since the structure is weak, it is considered that the printing ink penetrates into the surface layer and assists ventilation and heat conduction between the inner layer and the outer surface.

[0006]

【Concrete example】

 Polyethylene is used as a raw material, melt-spun, and the fibers obtained are fibrillated and three-dimensionally randomly deposited on a non-woven fabric (Asahi Kasei Kogyo, trade name: Luxer) with a cyclized rubber binder on one side. With the ink used, the cross-shaped grid ruled lines with a 1 cm interval were gravure printed and compared with the unprinted one, the result of leaving it outdoors showed that the printed one clearly prevented curling. It was FIG. 1 attached herewith shows an example of an original drawing of a straight cross ruled line (the base is indicated by 1 and the ruled line is indicated by 2), and FIG. 2 is an example of an inclined ruled line (the base is indicated by 1 and the ruled line is indicated by 3).

In addition to the curling prevention, the effect of preventing the swelling was also great when the appearance of the house for sale was further printed on the above-mentioned ruled base paper with the same ink as above. It is convenient for the purpose of the present invention to print something on the base paper of the present invention (the cross ruled lines have already been printed) because it effectively increases the number of places for surface treatment or treatment with ink. Become.

[0008]

[Effect of the device]

 Since the base paper of the present invention is basically ink-printable and is semi-transparent, it is possible to obtain special convenience such as checking misalignment of printing, but the special substrate Since the printing ink acts physicochemically on such an internal structure, special effects, which were not obtained in the printing finishing application in the case of the conventional paper-like plastic substrate as described above, can be obtained.

[0009]

[Brief description of drawings]

FIG. 1 is a plan view of a specific example in which orthogonal ruled lines are printed on the surface of a substrate.

FIG. 2 is a plan view of a specific example in which a diagonal ruled line is printed on the surface of a substrate.

FIG. 3 shows a cross-sectional view and a partially enlarged view of a substrate.

[Explanation of symbols]

 1 Base paper base 2 Orthogonal ruled lines 3 Oblique ruled lines A Surface layer of base paper B Internal center layer of base paper

Claims (1)

[Claims for utility model registration] [Claim 1] A non-woven fabric having a structure in which polyolefin fibers are fibrillated and three-dimensionally randomly deposited is used as a substrate, and crossed ruled lines are printed on the surface thereof. ..