JP2592377B2 - Pattern net for see-through and method for manufacturing see-through paper using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pattern net for see-through and a method for manufacturing a see-through paper using the same. More specifically, the present invention relates to a see-through pattern mesh that can be suitably used for a paper net of a round paper machine, an upper net of a circular net cylinder, an upper net of a dandy roll of a fourdrinier paper machine, and a method of manufacturing a see-through paper using the same. .

[0002]

2. Description of the Related Art Transparent paper, in which patterns, marks, and characters (hereinafter, referred to as patterns, etc.) are formed on paper by the thickness of a paper layer, is well known in the art. It is used for design paper for effect. A typical method of producing a transparent paper by a paper machine is a method of attaching a pattern net for transparency to a circular cylinder of a circular paper machine or a dandy roll of a fourdrinier paper machine to form paper. In all of these, the amount of fiber in the thickness direction of the paper differs between the pattern portion and the non-pattern portion, and a difference pattern of the light beam allows a transparent pattern to appear. The method of manufacturing these pattern nets for see-through is as follows: (1) A method of winding a gold cage or bamboo cage around the upper net of a circular cylinder cylinder or dandy roll. (2) A pattern made of wire, metal, resin, paper, etc. on the upper net. (3) A method of drawing a pattern or the like with paint or resin on the upper net and closing the mesh (4) A method of directly forming an uneven pattern or the like on the paper making net itself Etc. are well known.

[0003]

However, these conventional methods are only capable of forming a limited pattern of a see-through pattern net due to restrictions on the production of the pattern and the like. The above-mentioned method (1) is a well-known method for obtaining laid paper, but it is easy to make linear patterns at regular intervals because knits of specific thickness are knitted at regular intervals. On the other hand, it is unsuitable for arbitrarily changing the thickness of the stake or obtaining a curved pattern. In addition, the method (2) requires a high level of skill and an enormous amount of time to produce, attach, and paste patterns and the like, and restricts the height of characters and the thickness of lines required as a papermaking net, Is limited, and there is a disadvantage that it is a single expression means. In addition, the method (3) requires enormous labor, time, and a high degree of skill, and since the base paper mesh has openings, paints and resins flow into gaps of the mesh, resulting in delicate patterns and fine patterns. There is a drawback that lines and the like cannot be expressed. It is also difficult to change the height of the pattern or the like by raising the paint. The method (4) is performed by engraving a predetermined pattern or the like on a wooden board in advance by engraving the metal sheet on the wooden board, and punching out the unevenness of the pattern or the like with a mallet or the like. Skill is required, and there is a limit to the degree of mesh opening of the paper network and the fineness of the lines that can be expressed.
There is a disadvantage that the patterns that can be expressed are limited.

[0004] It is an object of the present invention to overcome these disadvantages of the conventional methods. Specifically, an object of the present invention is to easily obtain a transparent pattern net capable of expressing various patterns and the like, and to manufacture a transparent paper using the transparent pattern net.

[0005]

SUMMARY OF THE INVENTION The present invention provides a see-through pattern net formed by forming patterns, marks, and characters on the surface of a paper-making net with threads, and using the see-through pattern net. A transparent paper characterized by being manufactured.

[0006] The paper net used in the present invention may be a metal net made of bronze or stainless steel, which has been conventionally used in the paper industry, or polyamide, polyester, polypropylene, or the like.
Any paper net such as plain weave, long crimp weave, monoprene weave, ripple weave, satin weave, etc. made of plastic such as polyvinylidene fluoride can be used.

The yarn used in the present invention is JIS L
0104, a single yarn, a aligned yarn, a double yarn, a twin yarn, a multiple yarn, a triple yarn, a four yarn,
Any of cable threads and the like can be used. Examples of materials include natural fibers such as cotton, silk, hemp, and wool, regenerated cellulose, polynosic, polyvinyl alcohol, polyvinylidene chloride, polyvinyl chloride, polyacrylonitrile, acrylic, polyamide, and polyester. system,
Any of inorganic fibers such as glass fibers and carbon fibers excluding chemical fibers such as polyethylene and polyurethane and metal fibers can be used.

[0008] In order to form a pattern net or the like with a thread on the surface of a papermaking net, one or more threads are passed through a sewing needle, and a pattern or the like is formed by handicraft hand-sewn using a known flat stitch, loop stitch, chain stitch, or notch. Any of a method of forming using a technique such as a ted stitch, a detached stitch, and a compound stitch, and a means of forming mechanically using a sewing machine or an embroidery machine can be adopted. At this time, the pattern or the like can be imaged by a method using computer graphics, the data can be taken into an automatic embroidery machine, and a woven pattern can be formed by embroidering a paper making net. In the case of mechanically forming a pattern net or the like, a plastic paper net made of a material softer than metal can be suitably used to prevent breakage of the needle. In the case of metal paper nets, the threads forming the pattern are always passed between the meshes, whereas in the case of plastic paper nets, the needles can penetrate the nets themselves, making them delicate. There is another advantage that a complicated pattern can be formed. In addition, the pattern of the pattern formed on the paper making net and the pattern formed on the transparent paper may not be completely synchronized, but this depends on the type of the paper machine and the paper making conditions. This is to cause expansion and contraction. In this case, the pattern or the like formed on the papermaking net is appropriately corrected in advance. Also, by stacking the yarn on the pattern net for sheer,
It is possible to change the height of the pattern to give the pattern gradation. FIG. 1 is a front view of an example of a pattern net for clarification of the present invention, and shows a state in which a floral pattern 3 is formed on a plastic papermaking net 1 with a thread 2. FIG. 2 is a partially enlarged front view. FIG. 3 is a partially enlarged front view and a cross-sectional view of an example of a pattern net for stencil formation in which a pattern is formed by hand sewing, and a thread 2 is passed between different meshes of a papermaking net to form a pattern. FIG. 4 is a partially enlarged front view and a cross-sectional view of an example of a pattern net for shedding which is formed by an embroidery machine.
The yarn 2 is passed between the meshes of the papermaking net, entangled with the lower thread 4, inverted and emerges again on the surface, passed through another mesh, and the pattern is formed by repeating this. ing.

The formed pattern or the like has poor physical and chemical durability, and often causes problems such as deformation due to water, and fraying or cutting of the yarn due to long-term use. The surface of the patterned pattern is treated with a durable resin. Further, the yarn on the back of the papermaking net can also be resin-treated. However, if the fiber itself is made to be very durable, no resin processing is required. The resin treatment includes latexes such as styrene-butadiene latex, methyl methacrylate-butadiene copolymer latex, acrylonitrile-butadiene copolymer latex, emulsions such as polyacrylate emulsion and polyvinyl acetate emulsion,
Alternatively, using a resin solution such as polyester, polyacrylate, polyurethane, polyvinyl chloride, polyvinylidene chloride, cellulose nitrate, epoxy, melamine, or silicone, apply or impregnate the surface of the pattern or the like one or more times or partially. Do it in the way you want. At this time, a stabilizer, a curing agent, a water repellent, a coloring agent, a waterproofing agent, a filler and the like can be appropriately mixed with the resin. The advantage of resin treatment is that, besides the improvement of durability, the surface of the pattern etc. can be made dense and smooth, so that the papermaking fiber is prevented from biting into the yarn during papermaking,
It is possible to improve the clogging of the net due to long-time papermaking and to clarify a see-through pattern caused by embossing the resin on the surface of a pattern or the like. FIG. 5 shows a partially enlarged front view and a cross-sectional view of an example in which the surface of the thread 2 and the lower thread 4 forming the pattern of the pattern mesh of FIG.

Next, a method for producing a transparent paper using the transparent pattern net of the present invention will be described. In the present invention, first, chemical pulp such as kraft pulp and sulfite pulp made from softwood or hardwood, mechanical pulp, non-wood pulp made from thermomechanical pulp, bamboo, straw, etc., hemp, mulberry, mitsumata, goose, etc. Or a mixture of several kinds of synthetic fibers such as bast fiber, synthetic pulp, vinylon, nylon, polyester, etc., from which is used as a raw material, and the dry paper strength enhancer, wet paper strength enhancer, sizing agent, retention improver, A drainage improver, an antifoaming agent, a dye, a coloring pigment, a fluorescent agent, a fixing agent, and the like are added as necessary, and usually a freeness of 550 to 350 m
1 C. S. F. To prepare the stock. The see-through patterned net is attached directly to the cylinder of the round netting machine or as an upper net, or attached to a dandy roll of the fourdrinier machine, and then the transparent patterned paper is formed according to a conventional method. Alternatively, as proposed by the present applicant in Japanese Patent Application No. Hei 3-168752, a see-through pattern mesh can be driven between a mesh cylinder of a mesh paper machine and a rotating roll installed outside the mesh cylinder. The paper is stretched between a dandy roll and a rotating roll of a fourdrinier paper machine so that the see-through pattern mesh can be driven. The transparent paper of the present invention is usually paper-made at a basis weight of 40 to 200 g / m ² (dry weight), and may be coated with a sizing agent or a paper strength enhancer by a size press device or the like during the paper-making as necessary. The surface is smoothed by a super calender or the like. Needless to say, the pattern net for clarification of the present invention can also be used for the production of handmade paper.

[0011]

Examples are shown below. All weights indicate dry weight. Example 1 Polyester single yarn (multifilament yarn: JIS L2511, product number 20, fineness 10) was attached to a polyester mesh made of polyester having a width of 1200 mm and a mesh of 60 mesh / inch attached to a mesh cylinder of a mesh paper machine.
1D, the number of yarns 2 × 3) by an embroidery machine using FIG.
The rose flower pattern shown in FIG. The size of the pattern was 70 mm in length and 100 mm in width at the longest part, and the same pattern was repeatedly formed on the entire surface of the papermaking net with a pattern interval of 20 mm. The height of the pattern at this time is 0.3 mm, and the thickness of the flower pattern line is 0.5 mm for the thin part and 2 m for the thick part.
m. The pattern net was attached to a circular net cylinder, and a transparent patterned paper having a basis weight of 100 g / m ^{2 was formed} according to a conventional method with the following stock ratio. Paper material blend Pulp NBKP 150 Kg LBKP 390 Kg (freeness: 420 ml CSF) Chemicals Rosin sizing agent (trade name "SPN-700",
7.2Kg starch (trade name “Amicol”, manufactured by Nisse Chemical Co., Ltd.)
・ ・ ・ ・ 3Kg fixing agent (sulfuric acid band) ・ ・ 30Kg dye (all manufactured by BAYER Co., Ltd.) LEVACELL FAST YELLOW GFN
(L) ····· Pulp 0.02% LEVACELL FAST BLACK G ···
-0.002% vs. pulp As a result, transparent paper with a rose flower pattern pattern with rich gradation and delicate and complex design effects was obtained.

Example 2 A 1200 mm wide plain bronze metal paper mesh made of 65 mesh / inch bronze was sewn with a cotton thread (standard sewing thread of JIS L2101: raw yarn count 20S, number of ply yarns 3) in a circle having a diameter of 30 mm. The mark forming the letter T (the width of the mark is 1.
5 mm) was manually formed on the entire surface at a mark interval of 50 mm. An epoxy resin (trade name “Araldite 106” manufactured by CIBA-GEIGY Co., Ltd.) was applied several times to the mark surface to produce a pattern net having a mark height of 0.9 mm.
This was attached to the upper net of a dandy roll, and a perforated paper machine was used to produce a transparent paper having a basis weight of 90 g / m ² according to a conventional method using the stock formulation excluding the dye of Example 1. The obtained transparent paper had excellent performance as anti-counterfeit paper.

[0013]

As described above, the woven pattern net and the laid paper of the present invention are manufactured and have the following remarkable advantages. 1) It is possible to manufacture a see-through pattern net and a see-through paper by a much simpler method than the conventional method. 2) Compared to the conventional method, it is possible to produce a much wider variety of transparent papers. This is because the yarn used is more flexible than fine metal wire, and it is possible to express subtle and delicate patterns, and it is also possible to change the height of the pattern due to the overlapping part of the yarn And the ability to express gradation. 3) The pattern net for clarification of the present invention has a pattern or the like formed of yarn, so that the pattern or the like can be easily cut and deleted as compared with a conventional pattern net, so that the paper mesh can be repeatedly used. Become.

[Brief description of the drawings]

FIG. 1 is a front view of an example of a see-through pattern net of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a partially enlarged front view and a cross-sectional view of an example of a see-through pattern net formed by hand-stitching;

FIG. 4 is a partially enlarged front view and a cross-sectional view of an example of a see-through pattern net formed with a pattern by an embroidery machine.

FIG. 5 is a partially enlarged front view and a cross-sectional view of an example in which the surface of the pattern of the pattern mesh of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper net 2 Thread 3 Flower pattern 4 Lower thread 5 Resin

Claims (2)

(57) [Claims] 1. A see-through pattern net formed by forming a pattern, a mark, and a character with a thread on the surface of a papermaking net, and treating the surface of the pattern, the mark, and the character with a durable resin. 2. A method for producing a transparent paper, comprising using the pattern net for transparency as set forth in claim 1.