JP2000212899A - After formation of watermark-like pattern and paper with watermark-like pattern made by using the after formation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for after formation of a watermarklike pattern, capable of simply introducing an arbitrary watermark-like pattern into paper after a paper making process, bringing the pattern into paper at a low cost even in a small lot of number of shipping and providing the watermark pattern greatly effective for coping with counterfeit and defacement due to no change in quality and no deformation and to obtain a paper with a formed watermark- like pattern by using the method. SOLUTION: A block having a pulling transfer of a watermark pattern of arbitrary shape composed of letter, number or an arbitrary pattern is pressed under given pressure against a fixed position of paper made by mixing a plant fiber pulp with at least >=10 wt.% of synthetic fiber and making the mixture into paper, and the synthetic fiber at a part of the pressed paper is melted by heat generated by the pressing and/or another heat source to form a desired watermark-like pattern by after formation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper having a watermark-like mark and a method therefor, and more particularly to a watermark-like pattern wherein a watermark-like pattern is retrofitted after the papermaking step, not in the papermaking step. The present invention relates to a method of attaching a pattern and a paper with a watermark-like pattern formed by using the method.

[0002]

2. Description of the Related Art As is well known, there is a known technique for preventing a forgery or falsification of a document by adding a "watermark" to papers. Since it takes about 3 to 4 months to make the mold, not only does it take too much time to ship,
In the production of small lots, the cost is relatively high, and "watermarking" is performed in the paper making process, so that it is difficult to quickly insert a variety of arbitrary watermarks, and there is a problem that there is no versatility.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to make it possible to easily insert an arbitrary watermark-like pattern after a papermaking process and to reduce the number of shipments in a small lot. However, it can be inserted at low cost, and since this watermark-like pattern does not deteriorate or deform, it is very useful for countermeasures against forgery and falsification, and a watermark-like pattern formed using this method. It is intended to provide patterned papers.

[0004]

In order to achieve the above object, according to the present invention, as a first method of retrofitting a watermark-like pattern, a watermark pattern of an arbitrary shape composed of letters, numbers, or an arbitrary pattern is used. The imprinted plate is pressed at a desired pressure on a desired position of a paper formed by mixing at least 10% by weight of synthetic fibers with vegetable fiber pulp, and the heat generated by the pressing and / or another heat source is used to heat the paper. The method is characterized in that the synthetic fiber in the pressed portion is melted to add a desired watermark-like pattern.

According to the present invention, as a second method for achieving the above object, a plate obtained by molding a watermark pattern of an arbitrary shape composed of letters, numerals or an arbitrary pattern is used as a two-layer plant. A desired pressure is applied to a desired position of a paper comprising a fiber pulp layer and a synthetic fiber layer in which at least 10% by weight or more of synthetic fibers interposed between the pulp layers is applied, and heat and / or heat generated by the pressing are applied. Alternatively, the pressed portion of the synthetic fiber layer of the paper is melted by another heat source to add a desired watermark-like pattern.

Further, according to the present invention, as a paper with a watermark-like pattern for achieving the above-mentioned object, a plate obtained by molding a watermark pattern of an arbitrary shape consisting of letters, numerals or an arbitrary pattern is used as a plant fiber. Pressing a desired position of paper produced by mixing at least 10% by weight of synthetic fiber with pulp at a desired pressure, and applying heat and / or another heat source to the synthetic fiber in the pressed portion of the paper Is melted to form a desired watermark-like pattern after the papermaking process.

Further, according to the present invention, as another type of paper with a watermark-like pattern for achieving the above-mentioned object, a plate in which a watermark pattern of an arbitrary shape composed of letters, numerals or an arbitrary pattern is molded, A desired pressure is applied to a desired position on a paper comprising two vegetable fiber pulp layers and a synthetic fiber layer in which at least 10% by weight or more of synthetic fibers interposed between the pulp layers is generated by a required pressure. Heat and / or
Alternatively, the pressed part of the synthetic fiber layer of the paper is melted by another heat source, and a desired watermark-like pattern is formed after the paper-making process and thereafter formed.

In the present invention, the synthetic fiber is desirably made of a material which can be easily melted by a pressure applied when forming a watermark-like pattern, such as polyethylene having a melting temperature of about 120 ° C. and about 150 ° C. It is desirable to form either polypropylene or approximately 170 degree polyester or a combination thereof.

In the present invention, in order to prevent the synthetic fibers from being altered or deformed after melting, the amount of the synthetic fibers is at least 10% by weight based on the amount of the vegetable fiber pulp.
It is desirable to mix them. The pressure applied when forming the watermark-like pattern is 1 kg / cm2 to 3 k.
g / cm 2 or more is desirable, but it can be appropriately adjusted and selected depending on the type and blending amount of the synthetic fibers to be mixed.

Further, the plate used in the present invention can be easily formed by any known computer processing. Therefore, it is possible to easily change the shape of a local landmark / historic site, animals and plants, character designs, photographs and drawings, etc. Because it can be freely formed regardless of size and size, for example,
Personal certificates such as local promotion tickets and various gift certificates, for which prevention of counterfeiting and alteration are important, personal certificates such as seal certificates, resident certificates or official copies of family register copies and family register abstracts, as well as the source of documents, etc. It can also be used as paper for documents and confidential documents, and as a result, can be used as appropriate for all purposes. Of course, by making the watermark-like pattern a hologram or a micro character, it is possible to perform a more accurate forgery prevention process.

The paper having a three-layer structure with a watermark-like pattern according to the present invention is preferably used as OA paper such as copy paper or printer paper because the printing surface is formed of a vegetable fiber pulp layer. It is.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a flow of paper making for producing papers with a watermark pattern according to the present invention.

Reference numeral 1 in the figure denotes a pulper for improving the dispersion of synthetic fibers. In this embodiment, hot water is used to improve the dispersion of synthetic fibers, and the dispersion concentration is 1.
The feature is that it is 2% or less.

The synthetic fibers dispersed in the pulper 1 are sent from the chest 2 to 4 through 5 through a disintegrator 3.

On the other hand, the vegetable fiber pulp is sent from the pulper 6 through the chest 7 to the chest 9 from the beater 8 and then to the chest 5.

The plant fiber pulp and the synthetic fibers sent to 5 in this way are mixed at a required ratio by adding a paper strength enhancer, and then a sulfate band and a sizing agent are added by a chest 10. It is sent to the next stock inlet 11,
Thereafter, the paper is sent from the wire part 12 to the dryer 14 which is a drying step via the press part 13, and the paper dried by the dryer 14 is wound up via the poplar 15. In this embodiment, the dryer 1
Since the roll 16 was used in place of the bar interposed in the transport path between 4 and Popril 15, the generation of needle-like crystals of synthetic fibers could be effectively prevented.

FIG. 2 shows the flow of the rewinding step in the papermaking step of producing paper with a watermark-like pattern according to the present invention, that is, the step of rewinding the paper winding roll into a small winding.

In FIG. 1, reference numeral 20 denotes an unreel stand, 21 denotes a surface drum, 22 and 23 denote rollers interposed between the unreel stand 20 and the surface drum 21, and 24 denotes a slitter. Is shown. In this embodiment, since the expander roll 25 was used instead of the spreader bar used in the conventional rewinding process, the generation of needle-like crystals of synthetic fibers could be effectively prevented.

The paper with a watermark-like pattern according to the present invention comprises:
The paper is produced as described above. Table 1 shows the results of a panel test of the sharpness of the “watermark” according to the compounding ratio of synthetic fiber and vegetable fiber pulp and the pressure.

[0020]

[Table 1]

As is clear from the above panel test,
By blending 10% by weight or more of synthetic fibers with plant fiber pulp and pressing at a pressure of 1 to 3 kg / cm2, a paper with a clear watermark-like pattern could be easily obtained.

[0022]

As described above, in the method for attaching a watermark-like pattern according to the present invention and the paper with a watermark-like pattern formed by using this method, an arbitrary watermark is provided after the paper-making process. Wind patterns can be easily inserted, and even small lots can be inserted at low cost, and since the watermark pattern does not deteriorate or deform, it is very useful for counterfeiting and alteration. Many excellent effects can be obtained.

[Brief description of the drawings]

FIG. 1 is a process flow for making paper with a watermark-like pattern according to an embodiment of the present invention.

FIG. 2 is a flowchart of a rewind process in a papermaking process of the paper with the watermark-like pattern.

[Explanation of symbols]

 1,6 Pulper 2,7 Chest 3 Disintegrator 4 Beater 13 Dryer

Continuing from the front page (72) Inventor Yasuo Sakamoto 2-1-6 Baba-dori, Utsunomiya-shi, Tochigi Pref.Paper Chunaiuchi Co., Ltd. (72) Inventor Hiroshi Watanabe 4379, Shimada-shi, Shizuoka Tokai Pulp & Stock Company In-house (72) Inventor Makoto Sakizaki 1, 188 Iwaso-cho, Utsunomiya City, Tochigi Prefecture F-term (reference) 4L055 AF13 AF16 AF17 AF33 AJ01 BD18 BE20 CE62 EA04 GA45

Claims (8)

[Claims] 1. A paper plate formed by mixing at least 10% by weight or more of synthetic fibers with vegetable fiber pulp, in which a plate in which a watermark pattern of an arbitrary shape composed of letters, numbers or arbitrary patterns is formed is mixed. A watermark-like pattern, characterized in that the paper is pressed at a required pressure, and the synthetic fiber in the pressed portion of the paper is melted by heat generated by the pressure and / or another heat source to add a desired watermark-like pattern. Retrofit method. 2. A plate in which a watermark pattern of an arbitrary shape composed of letters, numbers or an arbitrary pattern is molded is used, and at least 10% by weight or more of at least 10% by weight of a vegetable fiber pulp layer interposed between these pulp layers. The paper is pressed with a required pressure to a desired position of the paper comprising the synthetic fiber layer in which the synthetic fibers are mixed, and the heat generated by the pressing and / or another heat source is pressed as the synthetic fiber layer of the paper. A method for retrofitting a watermark-like pattern, which comprises melting a portion to retrofit a desired watermark-like pattern. 3. The synthetic fiber according to claim 1, wherein the synthetic fiber is any one of polyethylene, polypropylene, and polyester, or a combination thereof.
The method of attaching a watermark-like pattern according to any one of the above. 4. A plate in which a watermark pattern of an arbitrary shape composed of letters, numbers, or an arbitrary pattern is modeled at a desired position on paper produced by mixing at least 10% by weight or more of synthetic fibers with vegetable fiber pulp. A watermark-like pattern obtained by pressing at a required pressure and melting the synthetic fiber in the pressed portion of the paper with heat generated by the pressing and / or another heat source to add a desired watermark-like pattern after the paper making process Paper. 5. A plate obtained by stamping a watermark pattern of an arbitrary shape composed of letters, numbers or an arbitrary pattern, comprising at least 10% by weight or more of at least 10% by weight of a vegetable fiber pulp layer interposed between the two layers. The paper is pressed with a required pressure to a desired position of the paper comprising the synthetic fiber layer in which the synthetic fibers are mixed, and the heat generated by the pressing and / or another heat source is pressed as the synthetic fiber layer of the paper. Papers with a watermark-like pattern obtained by fusing a part to add a desired watermark-like pattern after the paper making process. 6. The synthetic fiber according to claim 4, wherein the synthetic fiber is any one of polyethylene, polypropylene and polyester or a combination thereof.
Papers with a watermark-like pattern according to any of the above. 7. The paper with the watermark pattern described in any one of claims 4 to 6 can be used as a voucher such as a regional promotion ticket or various gift certificates, a seal certificate, a resident's card, a family register copy, a family register abstract, or the like. Papers with a watermark-like pattern, which are used as official documents, personal documents for individuals and companies. 8. Paper with a watermark pattern, wherein the paper with a watermark pattern according to claim 5 is used as OA paper such as copy paper or printer paper.