JP3280928B2 - Passbook cloth - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a passbook cloth, and more particularly, to a passbook cloth having suitability for ink-jet printing.

[0002]

2. Description of the Related Art Conventionally, as a passbook cover, a coated product obtained by treating cloth or paper with a composition comprising a resin, a filler, a pigment and the like has been used, and this is generally called a "passbook cloth". (See, for example, Japanese Utility Model Laid-Open No. 58-17172 and Japanese Utility Model Laid-Open No. 62-9564).

[0003] This passbook cloth is typically provided with one or several surface coating layers on the surface of a base cloth layer made of cotton fabric, and on the other hand, a back coating layer on the back surface of the base cloth layer. Has a structure in which a thin paper layer is provided, and natural and synthetic resins such as starch, casein, PVA, vinyl acetate, acrylic, ethylene-vinyl acetate copolymer, polyester, etc. It is prepared by applying a mixed paint such as an inorganic filler such as clay, silica, titanium, and alumina, a cross-linking agent, and a fungicide, performing a calendering process, and laminating a thin paper on the back surface.

[0004] The quality required of such a passbook cloth mainly includes suitability for offset printing, suitability for kanji printers, and suitability for attaching a cover, and passbook cloths having these suitability are commercially available. However, a passbook cloth having suitability for inkjet printing has not hitherto been found.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a passbook cloth which has suitability as a passbook cloth and also has ink jet printing suitability.

[0006]

In view of such circumstances, the present inventors have made intensive studies and as a result, have found that when the most surface layer has specific physical properties, ink jet printing suitability is imparted. They have found and completed the present invention.

That is, the present invention provides (1) an under layer on the surface of a base fabric layer, an upper layer on the under layer, a back coating layer on the back surface of the base fabric layer, The present invention provides a passbook cloth having a layered structure in which a thin paper layer is provided on a coating layer via an adhesive, and a surface tension of the upper layer is in a range of 32 to 36 dynes / cm.

The present invention also provides (2) the passbook cloth according to the above (1), wherein the passbook cloth has a flexibility of 250 to 600 mgf and a suitability for a kanji printer of 3 or higher. Offer a cross. Further, the present invention provides (3) the passbook cloth according to (1) or (2), wherein the pick is 10A or more and the concealability is 80 or more. Further, the present invention provides
(4) The upper layer according to any one of (1) to (3), wherein the upper layer is a layer containing an acetalized polyvinyl alcohol resin having a degree of acetalization of 47 mol% or more and a pH of 8 or less.
The present invention provides a passbook cloth described in (1). further,
The present invention provides (5) the passbook cloth according to (4), wherein the upper layer is a layer further containing an inorganic powder having an average particle size of 1.0 to 20.0 μm. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A passbook cloth according to the present invention will be described below with reference to the drawings. Referring to FIG. 1, the passbook cloth 1 of the present invention has a multilayer structure. That is, the under layer 3 and the upper layer 4 are sequentially provided on the surface of the base fabric layer 2, while the back coating layer 5 and the thin paper layer 6 are sequentially provided on the back surface of the base fabric layer. The back coat layer and the thin paper layer are joined via an adhesive (the adhesive layer is not shown).

First, the base fabric layer is typically made of a cotton fabric like a conventional passbook cloth. For example, materials such as 100% cotton fabric, T / C mixed fabric, and 100% PES can be used. Also, so-called binding and printing paper, nonwoven fabric, and other cloths, which are conventionally used for book covers and passbook covers, can be used. In any case, it is preferable to use one having a smooth surface.

[0011] Next, the under layer and the back coat layer are also made of a natural or synthetic resin such as starch, casein, PVA, vinyl acetate, acrylic, melamine, ethylene / vinyl acetate copolymer, polyester, etc. Inorganic fillers and crosslinking agents such as calcium, clay, silica, titanium oxide, and alumina,
It is coated with a mixed paint such as a fungicide. It should be noted that the under layer may be a plurality of layers of up to about five layers. As an example of the adhesive for bonding the back coating layer and the thin paper layer, a conventionally used adhesive such as a vinyl acetate adhesive can be used.

In the present invention, the upper layer is particularly characterized, and its surface tension is in the range of 32 to 36 dynes / cm. This time, it was found that ink jet printing suitability was exhibited only when the upper layer had such a surface tension range. Preferably, the passbook cloth of the present invention has a softness in the range of 250 to 600 mgf, and has a kanji printer suitability of the third grade or higher.

Here, the surface tension is measured in accordance with JIS K6768.
It is measured according to "Method of wetting test for polyethylene and polypropylene films". That is, a series of mixed liquids having different surface tensions in order are applied to the cloth surface, and the surface tension of the mixed liquid determined to just wet the cloth is adopted. The bending resistance is measured according to JIS L 1096, 6.20.1 “A method (Gurley method)”. That is, using a Gurley method test machine, fix the cross test piece, apply a load to the pendulum, rotate the movable arm at a constant speed, read the scale when the test piece separates from the pendulum, and based on this, a certain formula Ask by. Bending resistance is a measure of bending resilience. Immediately after printing on the cloth surface with a dot printer, the kanji printer is suitable for rolling a urethane rubber roller on top of it, and visually observing the density of the print shadow transferred from the roller to other parts of the cloth surface, Class 5 is judged as not being observed at all, class 1 as having a clear printed shadow in which characters can be read, and class 3 is ascertained when transfer occurs but the printed shadow is slightly blurred and characters cannot be read. Grades 2 and 4 are grades that are visually judged to be intermediate between those grades. In addition, in order to clarify the standards of the first to fifth grades, the standard examples shall be attached to the property submission form on the same date and submitted.

Examples of the upper layer having a surface tension range as described above include a degree of acetalization of 47 mol% or more,
A coating film containing an acetalized polyvinyl alcohol resin having a pH of 8 or less (Japanese Patent Application No. 9-366883).
No.). If the acetalization degree is less than 47 mol%, the bleeding and sharpness of the ink will be poor. On the other hand, if the pH is more than 8, coating suitability is remarkably deteriorated, so that a required amount of adhesion cannot be obtained, and ink bleeds out to deteriorate printability. Also, the water resistance is reduced. Thus, the degree of acetalization and p
If H is not in the above range, inkjet printability is not provided.

It is very effective to add a cationic compound, for example, a polyamine type or complex salt type compound to the acetalized polyvinyl alcohol resin in order to prevent ink bleeding and make the water resistance more effective. Particularly effective cationic compounds have a molecular weight of 10,000.
Above, more preferably 20,000 to 500,000, most preferably quaternary ammonium salt type polymer compound (solid content 40%) is added to 100 parts by weight of acetalized polyvinyl alcohol resin (solid content 12%). 1 to
10 parts by weight, more preferably 2 to 5 parts by weight are mixed.

It is also effective to use a mixture of one or more inorganic powders such as silica and white carbon in order to enhance the color developability and absorptivity of the ink. The average particle size of the powder that can be used is 1.0 to 20.0 μm, and more preferably 2.0 to 10.0 μm. %) 5 to 50 parts by weight, more preferably 15 to 25 parts by weight, per 100 parts by weight.

The passbook cloth of the present invention having the above-described structure preferably has a pick of 10 A or more and an concealment of 80 or more.
That is all. If the pick is less than 10A, the offset printing suitability becomes poor. If the concealing property is less than 80, the kanji printer becomes inadequate. here,
In accordance with JIS P 8129 "Method for testing surface strength of paper and paperboard", "2.1 Method Using Wax", the wax is melted on the surface of the sample, slowly cooled, and then peeled to remove the wax which does not damage the surface. The highest number is determined as the surface strength. According to JIS P8138 "Paper opacity test method", the sample was lined with a white and black standard plate, and the reflectance of each sample was measured using a green filter. Express it as opacity.

The passbook cloth of the present invention is obtained by forming an under layer, a back coating layer and an upper layer on a base fabric by a doctor coating method, a reverse roll coating method, etc., laminating thin paper on the back side, and finally calendering. Created by multiplying. The order of coating and bonding can be arbitrarily changed. The passbook cloth of the present invention thus obtained has good magnetic tape adhesion (400 gf / 10 mm) like the conventional passbook cloth.
that's all). Here, the adhesive strength of the magnetic tape is measured by attaching a test piece to a cloth, performing 180 ° peeling using a Tensilon machine, and obtaining an average value from a tensile load curve at the time of peeling.

[0019]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples. Example 1 Ingredients parts by weight wheat starch 15.0 parts vinyl acetate-acrylic resin 15.0 parts calcium carbonate 30.0 parts titanium oxide 5.0 parts melamine resin 3.0 parts water 32.0 parts 60th cotton wool fabric ( On the front and back surfaces having a thickness of 170 μ), the paint having the above formulation was applied in a wet state using a doctor coating method to a surface of 200 g / m ² and a back surface of 50 g / m ² .
g / m ^2, and dried by a doctor coating method.
The coating was applied and dried at 0 g / m ² . Component parts by weight Acetalized polyvinyl alcohol (solid content 12%) (pH 7) 50.0 parts (acetalization degree 50 mol%) Powdered silica (average particle size 3 μm) 10.0 parts Quaternary ammonium salt type cationic compound ( (Solid content: 40%) 3.0 parts water 40.0 parts Next, thin paper was adhered to the back surface using a vinyl acetate adhesive, and calendered to obtain a passbook cloth of the present invention.

Example 2 Similarly, a paint having the following formulation was applied to the top of the table in a wet state and dried. Component parts by weight Acetalized polyvinyl alcohol (solid content 12%) (pH 7) 50.0 parts (acetalization degree 50 mol%) Powdered silica (average particle size 12 μm) 10.0 parts Quaternary ammonium salt type cationic compound ( (Solid content: 40%) 3.0 parts water 40.0 parts Next, thin paper was adhered to the back surface using a vinyl acetate adhesive, and calendered to obtain a passbook cloth of the present invention.

Comparative Example 1 Similarly, a paint having the following formulation was applied to the top of the table in a wet state and dried. Component Parts by weight Polyvinyl alcohol (solid content 12%) 50.0 parts Powdered silica (average particle size 3 μm) 10.0 parts Quaternary ammonium salt type cationic compound (solid content 40%) 3.0 parts Water 40.0 Part Next, thin paper was adhered to the back surface using a vinyl acetate-based adhesive, and subjected to calendar processing to obtain a control passbook cloth.

Comparative Example 2 Similarly, a paint having the following formulation was applied to the top of the table in a wet state and dried. Component parts by weight Acetalized polyvinyl alcohol (solid content 12%) (pH 7) 50.0 parts (acetalization degree 50 mol%) Powdered silica (average particle diameter 35 μm) 10.0 parts Quaternary ammonium salt type cationic compound ( (Solid content: 40%) 3.0 parts water 40.0 parts Next, thin paper was adhered to the back surface using a vinyl acetate-based adhesive, and calendered to obtain a control passbook cloth.

The evaluation of the passbook cloth and the control passbook cloth of the present invention obtained in Examples 1 and 2 and Comparative Examples 1 and 2 is shown in Table 1 below. The offset printability was determined by printing using an RI test printing machine, and the inkjet printability was determined by EPSO.
It was evaluated by printing with NPM-2000C. In Table 1, ◎ is excellent, ○ is excellent,
Δ means slightly inferior, × means inferior.

[0024]

[Table 1]

As is clear from Table 1, the surface tension was 32.
The passbook cloth of the present invention in the range of ~ 36 dynes / cm has not only offset printing suitability but also ink jet printing suitability, whereas the control passbook cloth of the comparative example has offset printing suitability but not ink jet printing suitability. .

[0026]

According to the present invention, there is provided a passbook cloth excellent in ink jet printing suitability. The current passbook is printed with the pattern determined by each bank, but with the inkjet printing suitability, it is possible to create a personal passbook unique to consumers as seen in Purikura in recent years, and also prevent forgery Also useful.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a passbook cloth of the present invention.

[Description of Signs] 1: Cross for passbook, 2: Base cloth layer, 3: Under layer, 4:
Upper layer, 5: back coating layer, 6: thin paper layer

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-269893 (JP, A) JP-A-7-214991 (JP, A) JP-A-69564 (JP, U) Patent 3089308 (JP, A) B2) Japanese Patent Publication No. 5-23597 (JP, B2) Japanese Patent Publication No. 4-15746 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B42D 3/00-3/02 B42D 11 / 00 B41M 5/00 B32B 5/00

Claims (4)

(57) [Claims] 1. An under layer is provided on a surface of a base fabric layer, an upper layer is provided on the under layer, a back coating layer is provided on a back surface of the base fabric layer, and an adhesive is provided on the back coating layer. The upper layer is a layer containing an acetalized polyvinyl alcohol resin having an acetalization degree of 47 mol% or more and a pH of 8 or less, and a surface of the upper layer. A passbook cloth having a tension in the range of 32 to 36 dynes / cm. 2. The passbook cloth according to claim 1, wherein the upper layer is a layer further containing an inorganic powder having an average particle size of 1.0 to 20.0 μm. 3. The passbook cloth has a softness of 250-6.
3. The passbook cloth according to claim 1, which is in the range of 00 mgf and has a kanji printer suitability of the third grade or higher. 4. The passbook cloth according to claim 1, wherein the pick is 10 A or more and the concealing property is 80 or more.