JP3268059B2 - Magnetic ticket sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various magnetic ticket sheets, such as a ticket, a coupon, a commuter pass, a highway toll, a parking ticket, and an entrance ticket.

[0002]

2. Description of the Related Art Conventionally, there are various types of magnetic ticket sheets, and a magnetic recording layer is provided on one side of a support. This magnetic recording layer is required to have better magnetic properties as the density of magnetic recording increases. Among the quality characteristics required for the magnetic recording layer, the most important characteristic is the variation in the magnetic output of the magnetic recording information when reading the written information. If the variation is too large, it will appear as erroneous information at the time of reading, causing a problem that the normal operation of the devices is obstructed. In particular, it is generally said that the variation in the magnetic output of a magnetic ticket sheet using paper made of wood pulp as a main material as a support is inferior to the case where a plastic film is used as a support.

[0003]

SUMMARY OF THE INVENTION The present invention uses paper made of wood pulp as a main raw material as a support, and has a very small variation in magnetic output when a magnetic layer is provided thereon. The purpose of the present invention is to provide a magnetic ticket sheet having:

[0004]

Means for Solving the Problems As a result of intensive studies to solve this problem, the present inventors have found that a magnetic recording layer mainly composed of a ferromagnetic powder and an aqueous binder is provided on one surface of a support. In the magnetic ticket sheet provided, 5 wt% or more of a water repellent is contained in a support made mainly of wood pulp, and
The cobb size of the paper of the magnetic ticket sheet specified in S-P8140 is set to 10 g / m ² or less, and a magnetic recording layer containing a ferromagnetic powder and an aqueous binder as main components is provided thereon, so that the magnetic output varies. It has been found that a good magnetic ticket sheet having a small value can be obtained. The smaller the degree of cobb size is, the more preferable it is. However, a preferable value can be arbitrarily selected in consideration of the manufacturing process and cost. JIS-P81
The degree of cobb size of paper specified in 40 is a test method of water absorption when one side of paper or paperboard is in contact with water for a certain time,
A test piece (approximately 130 mm × 130 mm) after mass measurement is fixed between the table and a metal ring (area 100 cm ² ), and after pouring about 50 ml of 20 ° C. water and contacting for a predetermined time, the surface is blotted with blotting paper. Except for water and measure the mass. The amount of water absorption per 1 m ² (g / m ² ) is determined and expressed as the degree of water absorption. In this specification, the predetermined time for contact with water was 30 seconds unless otherwise specified.

[0005] The support used in the present invention is mainly made of wood pulp. In addition, plant fibers, synthetic pulp made of synthetic resin, cellulose-based chemical fibers, synthetic fibers, glass fibers, and other inorganic fibers are required. They can be used together depending on the situation. The raw materials of wood pulp include red pine, black pine,
Fir, spruce, fir, hemlock, cedar, cypress, larch, shirabe, spruce, hiba, merkushimatsu, radisia
Conifers such as tapain, benimatsu, pine, cedar, spruce, white fur, etc., hippo, beech, alder,
Hardwoods such as oak, tub, shrimp, birch, aspen, poplar, ash, shrimp, eucalyptus, mangrove, lauan and the like can be mentioned. In addition, fillers such as talc and calcium carbonate, synthetic resins, sizing agents such as rosin and starch, and, if necessary, wet strength improvers, softeners, curing agents, retention improvers, defoamers, gums, and water repellents A magnetic recording layer having a ferromagnetic powder and an aqueous binder as main components is provided on the support. The basis weight of the support is 60
Preferably those to 300 g / m ^2, more preferred range is 100 to 200 g / m ^2.

[0006] Since the support contains a water repellent,
It is easy to produce one with a cobb size of 10 g / m ² or less. The method of paper-making a sizing agent and a water-repellent agent together with wood pulp has been used in the industry for a long time, and glossiness or printability is improved depending on the purpose. There is no literature describing that the magnetic properties are improved when a magnetic recording layer is provided on a substrate whose water absorption is reduced by adding a water repellent to the support.

In order to obtain a good magnetic ticket sheet, the amount of water repellent used must be about 5% to 20% of the wood pulp by weight, but it must be much larger than the amount usually used in the art. Is new. If the cobb size is 10 g / m ² or less, a sufficient effect can be obtained, and even if an unnecessarily large amount of water repellent is used, it is only economically disadvantageous. In order to reduce the cobb size to 10 g / m ² or less, the type and amount of the water repellent are determined by freely adjusting according to the quality characteristics of the end user.

For the production of paper as a support, a paper machine such as a long net, a round net or a twin wire can be used, and if necessary, a method such as a size press or a coating can be used. The characteristics of the present invention can be imparted. Also, the variation in magnetic output is affected by the surface properties of the sheet. Since the flat surface has better adhesion to the magnetic head, it is quite natural that the variation in the magnetic output is reduced. Therefore, after the paper making process and the magnetic layer coating process, a flattening device such as a machine calender, a gloss calender, a super calender, and brushing can be used.

The water repellent of the present invention can be selected from a wide range as long as it has an effect of lowering the water absorption of a support mainly composed of wood pulp. For example, animal and plant waxes such as carnauba wax, rice wax, beeswax, and seraca wax, petroleum waxes such as paraffin wax and petrolatum, synthetic waxes such as polyethylene wax, higher fatty acids and metal salts, amides and esters thereof, and styrene- Acrylic, acrylic, urea-formalin, urethane and other resins, alkyl ketene dimer, silicone oil, metal soap and the like can be used alone or in combination.

The magnetic recording layer contains a ferromagnetic powder and an aqueous binder as main components, and, if necessary, an antifoaming agent, a thickening agent, a curing agent, a penetrating agent, an antiblocking agent, a water repellent, and a waterproofing agent. Etc. can be used. As the magnetic powder, gamma ferrite, barium ferrite, strontium ferrite, etc. are used, but barium ferrite and strontium ferrite having a coercive force of 1500 to 5000 Oe are often used so that magnetic recording information is not erased by a normal magnet. . Incidentally, a polyacrylic acid-based salt or the like can be used for dispersing the magnetic powder.

Examples of the aqueous binder include oxidized starch and air.
Starches such as tellurized starch, hydroxyethyl cellulose, methyl cellulose, polyvinyl alcohol,
Water-soluble binders such as polyacrylamide, carboxymethyl cellulose, gum arabic, casein, gelatin, and polyethylene oxide, and various latexes such as polyurethane, vinyl chloride, polyacryl, and styrene butadiene can be used.

As the apparatus used for coating the magnetic recording layer of the present invention, an air knife coater, a gravure coater, a roll coater, a rod coater, a curtain coater, a die coater, a lip coater, a blade coater and the like are used. Also, printing methods such as offset and silk screen can be used.

[0013]

According to the present invention, a magnetic ticket sheet having a small variation in magnetic output can be obtained by applying a magnetic recording layer coating solution to a support having a low water absorption. The reason seems to be related to the behavior of the coating solution from the time when the coating solution comes into contact with the support to the time of drying when the coating solution for the magnetic recording layer is applied. That is, since the change in the liquid composition due to migration appears as a variation in the magnetic output, it is considered that this characteristic is improved by lowering the water absorption of the support.

[0014]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto.
In addition, "part" in an Example shows a weight part.

Example 1 Papermaking Examples The mixing ratio of the support is as follows. Wood pulp (LBKP) (solid) 100 parts Rosin (solid) 1 part Sulfuric acid band (solid) 2 parts Polyacrylamide (solid) 0.5 parts Water repellent (solid) 5.5 parts (fluorinated polymer emulsion, Asahi Glass (Asahigard AG550, manufactured by Sharp Corporation)
The sodium salt of rosin was added, a sulfuric acid band, a cation-modified polyacrylamide, and finally a water repellent were added to reduce the solid content of the aqueous slurry to about 0.3%. A support for a magnetic ticket sheet having a basis weight of 150 g / m ² was obtained from the above stock using a Fourdrinier paper machine. Preparation of Magnetic Recording Layer Coating Solution The following composition was dispersed day and night by a ball mill to prepare a magnetic recording layer coating solution. Barium ferrite (MC127, coercive force 2700 Elsted, manufactured by Toda Kogyo KK) (solid) 100 parts Urethane-acrylic resin (Varistar UD2017-1 manufactured by Mitsui Toatsu) (solid) 30 parts Polyethylene oxide (PEO manufactured by Sumitomo Seika) (Weight-average molecular weight: 200,000) (solid) 5 parts On one side of the support having a basis weight of 150 g / m ² obtained by the above-mentioned formulation, a magnetic recording layer coating liquid was coated with a coating rod at a solid content of 30 g / m ^2. m ^2, and 1 after magnetic field orientation
After drying at 10 ° C., a magnetic ticket sheet of the present invention was obtained.

Example 2 A magnetic ticket sheet was obtained in the same manner as in Example 1 except that 10 parts of a water-repellent agent was used in the preparation of the support.

Example 3 A magnetic material was prepared in the same manner as in Example 1 except that the same amount of paraffin wax emulsion (PAREX latex NS-70D, manufactured by Misawa Ceramics Co.) was used as a water repellent in preparing the support. I got a ticket sheet.

Example 4 In Example 1, styrene was used as a water repellent for preparing a support.
A magnetic ticket sheet was obtained in the same manner as in Example 1 except that the same amount of an acrylic resin (manufactured by Dick Hercules, Epinox GR100) was substituted.

Example 5 A magnetic sheet was prepared in the same manner as in Example 1 except that zinc stearate (manufactured by Chukyo Yushi Co., Ltd., Himicron F930) was replaced by the same amount as a water repellent in the preparation of the support. -Obtained.

Example 6 The procedure of Example 1 was repeated, except that the same amount of urea-formalin resin (Tamacoat 138, manufactured by Arakawa Chemical Co.) was used as a water repellent for preparing the support. I got a ticket sheet.

Comparative Example 1 A magnetic ticket sheet was obtained in the same manner as in Example 1 except that a support without using a water repellent was prepared.

Comparative Example 2 A magnetic ticket sheet was obtained in the same manner as in Example 1 except that a support using three parts of a water repellent was prepared.

The magnetic ticket sheets obtained in the above Examples and Comparative Examples were evaluated by the following methods. Table 1 shows the results. (Water absorption) According to the Cobb size method specified in JIS-P8140, in this specification, the contact time between the sample and water was 30 seconds. (Dispersion of magnetic output) Variation from the average value of the output was measured by a magnetic characteristic analyzer for prepaid card (210 BPI writing FM system). The unit is shown in%, and the smaller the value, the better.

[0024]

[Table 1]

[0025]

The magnetic ticket sheet of the present invention has little variation in the magnetic output and has good magnetic properties.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B42D 5/00-15/10 D21H 17/00-27/42 G11B 5/80

Claims (1)

(57) [Claims] 1. A magnetic ticket sheet having a magnetic recording layer mainly composed of a ferromagnetic powder and an aqueous binder on one surface of a support, wherein 5 wt. % Or more of a water repellent, and JIS-P8140
The cobb size degree of the paper of the magnetic ticket sheet specified in 10g /
Magnetic tickets sheet characterized by at m ² or less.