JP3445163B2 - Cover material for passbook and passbook - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passbook cover material used for bank passbooks, post office savings passbooks, and the like, and a passbook made using this passbook cover material. By suppressing the occurrence of curl due to the above, it is possible to prevent the occurrence of troubles particularly when a passbook is conveyed in an automatic passbook issuing machine or the like.

[0002]

2. Description of the Related Art Cover materials used for bank passbooks and post office savings passbooks are mainly made of thin cotton fabrics such as loans with an undercoating layer that has good affinity with cotton. The surface resin layer having good printability is laminated on the pulling layer, and the thin paper is laminated on the back side undercoating layer. However, in the passbook using the cover material for the passbook, a phenomenon in which the vertical direction curls in a temperature / humidity change of the environment, especially in a low humidity atmosphere, more specifically, the long side of the cover of the passbook is convexly curved to the front side. A phenomenon occurs, this is a passbook automatic issuing machine,
This has been a cause of transport problems in automatic teller machines and automatic teller machines.

[0003]

DISCLOSURE OF THE INVENTION The present invention eliminates curl by changing the base fabric without changing the material of the thin paper or the return paper, and by selecting the front and back coating layers, it can be used as a passbook. It maintains required characteristics, for example, printability such as printability and absorption of printing ink, and adhesiveness to a magnetic tape.

[0004]

A cover material for a passbook according to the present invention is provided with an undercoat layer on both front and back surfaces of a woven fabric made of organic fibers, and a surface resin layer having good printability is provided on the undercoat layer on the front surface. In a cover material for a passbook, in which thin paper having a basis weight of 15 to 20 g / m ² is laminated on the undercoat layer of
Polyethylene terephthalate multifilament yarn
Others Ri plain weave der consisting spun yarn, the undercoat layer described above vinegar
100 parts by weight of vinyl acetate / acrylic acid ester copolymer ,
Titanium oxide 10 to 100 parts by weight and inorganic filler 10 to
It is characterized in that it consists of 100 parts by weight of the mixture.

In the cover material for passbooks of the present invention, the expansion and contraction behavior of the polyester fabric as the base material due to moisture absorption and release is similar to the expansion and contraction behavior of the return paper, and therefore after the return paper is adhered to the back surface of the polyester fabric. No curl occurs. On the other hand, the shrinkage of the cotton fabric when absorbing moisture is considerably larger than that of the return paper, and thus the above-mentioned curl is likely to occur. In addition, since nylon stretches in the opposite direction, curling is likely to occur. Further, in this invention, since the undercoat layer having a good affinity with polyester is used, the undercoat layer does not peel off, and therefore the surface layer or the thin paper on the undercoat layer does not peel off, and thus the surface layer is not seen. The same printability can be obtained by using the same paper as the conventional one.

As the above polyester, polyethylene terephthalate is particularly preferable in terms of good dimensional stability. The polyethylene terephthalate fibers may be used in the multi-filament yarn or any form of the spun yarn, the fabric, plain weave fabric such as taffeta is preferable in that the organization has a solid basis weight is 30 to 100 g / m
² is preferred.

For the conventional cotton fabric, the subbing layer is made of any one of starch, casein, polyvinyl alcohol, polyvinyl acetal, polyacrylic acid ester, polyvinyl acetate, ethylene / vinyl acetate copolymer, or the like, or had been used as a mixture of two or more, in this invention, vinegar <br/> acid vinyl-acrylate copolymer excellent thermoplastic resin affinity with the polyester, it is used.
The vinyl acetate-acrylic acid ester copolymer good preferable in terms of stability of the adhesive and coating the fabric.

The above thermoplastic resin is used by adding 10 to 100 parts by weight of titanium oxide to 100 parts by weight thereof. If the amount of titanium oxide added is less than 10 parts by weight, the hiding power will be weak and the back surface will be visible, while if it exceeds 100 parts by weight, the adhesion to the fabric will be reduced, and the pick strength and magnetic tape adhesion during printing will be reduced. The power decreases. In addition to titanium oxide, by adding 10 to 100 parts by weight of an inorganic filler such as calcium carbonate, clay, aluminum hydroxide or zinc white, the tackiness of the undercoat layer can be adjusted appropriately.
However, if the amount is less than 10 parts by weight, tackiness occurs and it becomes difficult to apply the surface layer. On the contrary, if the amount exceeds 100 parts by weight, the adhesion to the woven fabric decreases.

The solid coating amount of the undercoat layer is 5 to 20 g.
/ M ² is preferable, and if it is less than 5 g / m ² , the effect of the undercoat layer cannot be obtained, and if it exceeds 20 g / m ² , the thickness of the cover of the passbook becomes too large and the result falls outside the standard.

The surface resin layer laminated on the above-mentioned undercoat layer is a coating film for satisfying passbook required characteristics such as printability and adhesiveness of a magnetic tape. As in the conventional case, starch and casein are used as resins. , Polyvinyl alcohol, polyvinyl acetal, polyacrylic acid ester, polyvinyl acetate, ethylene / vinyl acetate copolymer, etc., alone or in combination of two or more, and silica or calcium carbonate is used as an inorganic filler. , Titanium oxide, etc. are added.

In particular, a surface resin layer made of a mixture of starch, ethylene / vinyl acetate copolymer, polyvinyl alcohol, calcium carbonate and titanium oxide is preferable from the viewpoint of printability. The preferable composition is 50 to 250 parts by weight of the inorganic filler with respect to 100 parts by weight of the resin content, and particularly 10 parts by weight.
0 to 200 parts by weight is preferable, and if it is out of the above range,
Printability is reduced. The solid content of the surface resin layer is preferably 30 to 150 g / m ^{2, and if it} is out of this range, the printability is deteriorated.

The thin paper laminated on the undercoat layer on the back side has a basis weight of 15 to 20 g / m ² as in the conventional case, and is adhered with an adhesive made of an ethylene vinyl acetate copolymer resin as in the conventional case. To be done. The obtained cover material for passbook is subjected to desired printing in the same manner as in the conventional art, and then, a back sheet that has been saddle-stitched with the text sheet is pasted onto the thin paper on the back side, folded in two at the center, pressed and cut. It is given as a passbook.
However, the cover material for the passbook described above is processed into a long continuous sheet, but the long side of the cover of the passbook, that is, the folding line direction of the two folds, is aligned in the length direction (machine direction). Be cut. When the passbook is processed and used as described above, the cover does not curl, and therefore, no conveyance trouble occurs when the passbook is passed through the passbook automatic issuing machine, the automatic teller machine, the automatic payer, or the like.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A plain woven fabric having a basis weight of 30 to 100 g / m ² is woven by using a multifilament yarn made of polyethylene terephthalate as a warp and a weft, and a vinyl acetate / acrylic acid ester copolymer is formed on both front and back surfaces thereof. An undercoating coating consisting of 100 parts by weight, 10 to 100 parts by weight of titanium oxide and 10 to 100 parts by weight of calcium carbonate is applied to form an undercoating layer having a solid content of 5 to 20 g / m ² and front side undercoating. The surface layer paint consisting of a mixture of starch, ethylene / vinyl acetate copolymer, polyvinyl alcohol mixed resin 100 parts by weight, calcium carbonate 40-180 parts by weight and titanium oxide 10-70 parts by weight is applied on the layer to give solid content. A surface resin layer having an amount of 30 to 150 g / m ² is formed, and a basis weight of 15 to 2 as a backing paper on the back side undercoat layer.
A 0 g / m ² thin paper is applied. Then, using the obtained cover material for passbook, the passbook is bound and used according to a conventional method.

[0014]

EXAMPLE A multifilament yarn (75 denier) made of polyethylene terephthalate was used for the warp and weft, and the warp density was 86 threads / inch, the weft density was 72 threads / inch, and the basis weight was 62 g /
A plain fabric of m ² was woven, and 100 parts by weight of vinyl acetate / acrylic acid ester copolymer and 1 part of titanium oxide were formed on both front and back surfaces.
An undercoat layer (solid content: 15 g / m ² ) consisting of 0 parts by weight and 30 parts by weight of light calcium carbonate was formed, and 60 parts by weight of starch and 30 parts by weight of ethylene / vinyl acetate copolymer were formed on the front side undercoating layer. Parts, 10 parts by weight of polyvinyl alcohol,
A surface resin layer (solid content: 90 g / m ² ) consisting of 100 parts by weight of calcium carbonate and 15 parts by weight of titanium oxide was formed, and after calendering, a surface weight of 18 g / m ² was applied on the back side undercoat layer. A thin paper was attached to obtain a passbook cover material of Example 1.

Comparative Example 1 The subbing layer was omitted, and a surface resin layer was directly provided on a plain woven fabric so that the solid content was 85 g / m ² .
After that, calendering was performed, and the same thin paper as in Example was attached to the back surface to obtain a cover material for passbook of Comparative Example 1.

Comparative Example 2 An undercoat layer comprising 100 parts by weight of vinyl acetate / acrylic acid ester copolymer, 10 parts by weight of titanium oxide and 150 parts by weight of light calcium carbonate on both sides of the plain woven fabric of Example (solid content) : 15 g / m ² ) and processed in the same manner as in the following Examples to obtain a cover material for a passbook of Comparative Example 2.

Comparative Example 3 60-count cotton yarn was used for the warp and weft, and the warp density was 90 /
A plain weave with a inch and a weft density of 88 / inch was woven, and the following Comparative Example 1 was used.
The passbook cover material of Comparative Example 3 was obtained by processing in the same manner as.

COMPARATIVE EXAMPLE 4 A 65/35 blended yarn of polyester and cotton (45 count) was used as a warp and a weft to weave a plain weave having a warp density of 96 yarns / inch and a weft density of 87 yarns / inch. The passbook cover material of Comparative Example 4 was obtained by processing in the same manner as.

Comparative Example 5 Nylon multifilament yarn (70 denier) was used for the warp and weft, and a plain weave having a warp density of 106 yarns / inch and a weft density of 84 yarns / inch (total warp density of 190 yarns / inch) was woven. Then, the same process as in the following examples was performed to obtain a cover material for a passbook of Comparative Example 5.

For the above Examples and Comparative Examples 1 to 5, the pick strength (strength of the surface coating film) was determined according to JIS P812.
The wax method of 9 was tested. 9 in this wax test
A or less is not suitable for practical use because the coating film is broken during offset printing. The results are shown in Table 1 below. However, "ratio" in the table means "comparative example".

[0021]                                 Table 1       Sample No. Example Ratio 1 Ratio 2 Ratio 3 Ratio 4 Ratio 5       Pick strength 15A 5A 8A 18A 16A 13A

An underwater expansion / contraction test was carried out on the Examples and Comparative Examples 3 to 5 which cleared the above pick strength. First, a square sample having a length of 30 cm and a width of 30 cm was cut out from the passbook cover materials of the above Examples and Comparative Examples 3 to 5,
A longitudinal centerline is drawn to a length of 20 cm at the center, the above sample is immersed in water under an environment of a temperature of 20 ° C. and a humidity of 65%, and taken out after 1 minute, until the sample is dried,
The length of the center line was measured with a caliper every predetermined time, and the expansion / contraction rate was calculated by the following formula. In the formula, Lo is the length before immersion, L
x is the length after a predetermined time. Expansion / contraction rate (%) = {(Lx-Lo) / Lo} × 100

The above-mentioned measurement results are shown in FIG. 1 together with the expansion / contraction ratio of the backing sheet measured in the same manner as above. As shown in FIG. 1, the expansion / contraction behavior of the example is similar to that of the above-mentioned return paper, but the expansion / contraction rate of the comparative example is significantly deviated. Therefore, the cover material for the passbook of the embodiment hardly curls in the vertical direction.

Next, a passbook is bound using the cover material for passbooks of the above-mentioned Examples and Comparative Examples 3 to 5, and the passbook is bound at 20 ° C. and 40%.
The curling state when the bookbinding sample was allowed to stand for 6 hours in a low humidity atmosphere of RH, a medium humidity atmosphere of 20 ° C. and 65% and a high humidity atmosphere of 20 ° C. and 80% was compared. The results are shown in Table 2. In the table, ◯ indicates no curl, Δ indicates small curl, and x indicates large curl.

[0025]                                 Table 2                     Example Comparative Example 3 Comparative Example 4 Comparative Example 5   20 ℃, 40% RH ○ △ △ ×   20 ℃, 65% RH ○ ○ ○ ○   20 ℃, 80% RH ○ △ △ △

[0026]

As described above, the cover material for passbooks according to claims 1 and 2 is capable of satisfying the required characteristics as a passbook without curling, and thin sheets and return sheets are There is no need to change the conventional one. The invention according to claim 3 is a passbook bound using the cover material for a passbook as a cover, and since the cover does not curl, a trouble caused by the curl when passing through a passbook automatic issuing machine etc. Does not occur.

[Brief description of drawings]

FIG. 1 is a graph showing expansion and contraction of a cover material for a passbook.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B42D 3/02 B42D 11/00

Claims (3)

(57) [Claims] 1. An undercoat layer is provided on both front and back sides of a woven fabric made of organic fibers, a surface resin layer having good printability is provided on the undercoat layer on the front side, and a basis weight of 15 to 20 g / m 2 on the undercoat layer on the back side. ^{In the} cover material for passbooks in which ^two thin papers are laminated, the above-mentioned fabric is a multifilament of polyethylene terephthalate.
Plain weave der consisting bets yarn or spun yarn is, the undercoat layer copolymer 100 parts by weight vinyl acetate-acrylic acid ester of the above, a mixture of titanium oxide 10 to 100 parts by weight inorganic filler 10-100 parts by weight A cover material for a passbook, which is made of. 2. The solid coating amount of the undercoat layer is 5 to 20 g / m.
² The cover material for passbook according to claim 1, wherein 3. The method according to claim 1 or 2.
That it is bound with the cover material for the passbook
Characteristic passbook .