JP3320337B2 - How to make an information carrying sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an information carrying sheet having a facing surface which is temporarily adhered but can be easily peeled off when necessary. More specifically, the present invention relates to an information-bearing sheet suitable for use as a foldable card, a superimposed card, a confidential information sheet such as an information concealing sheet, a scalable arrangement sheet, a printing sheet, a copy sheet, and the like. It is about the creation method.

[0002]

2. Description of the Related Art In recent years, with the amendment of the Postal Law, postcard systems having confidentiality have been put to practical use and have begun to spread.
This postcard system having confidentiality, for example, folds a postcard on which personal information or various information such as print information and print information is described, glues the overlapped portion, conceals the information, and then mails it. In this system, the recipient peels off the overlapped portion again and reads the hidden information.

Heretofore, as an adhesive system having such a function, an adhesive layer is provided on one surface of a laminate of two transparent films that can be peeled in between, and this adhesive layer is covered with release paper. Is attached to the cover for concealment, and after filling in the required information in the communication field, it is superimposed on the communication field, excluding the release paper. There is known a method in which information is peeled off in the middle and information is read.
However, in such a system, since a film laminate for bonding is present, a step is generated between the laminated portion on the sheet surface and other portions, and the thickness of the sheet as a whole is increased. However, when information is written on the sheet surface, it cannot be smoothly fed to a printer, and printing with a non-impact printer such as a xerography method is difficult. In addition, there is inconvenience that the release paper must be removed during use.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is no danger of blocking due to an adhesive due to stacking during sheet storage, and feed to a printer at the time of writing information and printing on an adhesive layer surface with various printers. Can be easily performed and the sheet after bonding can be easily peeled off. Even after peeling, there is no possibility of blocking, and an information carrying sheet having a spread portion where writing and printing can be performed is easily created. The purpose is to provide a method for doing so.

[0005]

The inventor of the present invention has conducted intensive studies to develop a simple method for preparing an information-carrying sheet having the above-mentioned preferable properties. the layer of the adhesive composition comprising a particulate filler exhibits no affinity non-peelable adhesive base agent used with respect to the adhesive base agent is provided, then this
By pressing the adhesive layer surface with irregularities, the surface
Pressing the Ri every business trip, by this <br/> and to properly adjust the degree of unevenness, it found that can achieve the purpose, and completed the present invention based on this finding.

That is, the present invention relates to a method for producing an information carrying sheet using at least a part of a base sheet surface as an overlapping surface, carrying information on the overlapping surface, and bonding the overlapping surfaces together. First , a non-peelable adhesive composition containing a non-affinity fine-grained filler is applied to the above-mentioned superposed surface to form an adhesive layer having irregularities on the surface, and then the adhesive layer surface having irregularities is pressed. thing
And press the excessive protrusion on the surface to reduce the degree of unevenness.
It is an object of the present invention to provide a method for producing an information carrying sheet, which includes proper adjustment .

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The adhesive composition used for forming the adhesive layer in the method of the present invention is a non-peelable adhesive, and is a pressure-sensitive adhesive composition, a heat-sensitive adhesive composition, a rewet adhesive. There is a composition, and an appropriate adhesive base is used as the adhesive base. These are used as ordinary adhesives, and are of the type that once adhered, do not peel off again.

[0008] The pressure-sensitive adhesive composition has a property of bonding by pressure without bonding in a normal state, and there is no particular limitation on the adhesive base, and natural rubber and synthetic rubber are used. And the like can be arbitrarily selected from those conventionally used in ordinary pressure-sensitive adhesives, and particularly, natural rubber obtained by graft copolymerizing styrene and methyl methacrylate on natural rubber. Latex is preferred in terms of blocking resistance, heat resistance, abrasion resistance and the like.

The heat-sensitive adhesive composition has a property of bonding by heat or heat and pressure without bonding in a normal state, and the adhesive base is not particularly limited. , Can be arbitrarily selected from those conventionally used in ordinary heat-sensitive adhesives,
Particularly, a vinyl acetate polymer is preferable.

Further, the rewet adhesive composition has a property of bonding by rewet without adhering in a normal state, and a water-soluble polymer compound is usually used as an adhesive base. Used. The water-soluble polymer compound is not particularly limited, and those commonly used in conventional rewetting adhesives, such as polyvinyl alcohol and polyethylene oxide, are preferably used.

Further, such a non-peelable adhesive composition contains a fine-grained filler, and the fine-grained filler has a non-affinity for the adhesive base. Are those having a small affinity with the adhesive base,
Among them, zinc oxide, titanium oxide, calcium carbonate, kaolin, activated clay, spherical alumina, wheat starch, silica,
Glass powder, shirasu balloon and the like can be mentioned. These materials may be used alone or in combination of two or more, but a combination of silica and another filler is particularly preferable. When two or more kinds of particles having different particle diameters are used in combination, the surface of the adhesive layer can be easily formed in an uneven shape, which is advantageous in improving the peeling performance and the printing performance. By adding the silica, the coating film of the adhesive can be strengthened, and since the silica is porous, the adhesive easily adheres to the surface, the adhesive force and the peeling force are easily adjusted, and the silicone oil is used. Even when printing is performed by a non-impact printer method by the printer used, the silica absorbs the silicone oil, so that the adhesive layer is not adhered by the silicone oil. These fine-particle fillers have an average particle size of 0.01 to 30 μm,
Preferably, the thickness is in the range of 1 to 20 μm.

[0012] The fine particulate filler can be used in any of a pressure-sensitive adhesive composition, a heat-sensitive adhesive composition and a re-wet adhesive composition. In the composition, 100 to 400 parts by weight of the fine particulate filler, preferably 130 to 300 parts by weight, more preferably 150 to 2 parts by weight, based on 100 parts by weight of the adhesive base.
It is desirable to mix at 50 parts by weight. On the other hand, in the heat-sensitive adhesive composition, it is desirable to mix 45 to 100 parts by weight, preferably 55 to 90 parts by weight, and more preferably 60 to 80 parts by weight with respect to 100 parts by weight of the adhesive base. If the amount of the fine particulate filler is less than the above range, the blocking resistance is poor and the adhesive strength is too strong. If the amount exceeds the above range, the adhesive strength tends to be too low, which is not preferable. In the adhesive composition in the method of the present invention, it is necessary to appropriately select the mixing ratio of the adhesive base and the finely divided filler used in this manner.

In the method of the present invention, first, at least a part of the surface of the base sheet is used as a superposed surface, and the adhesive composition is applied to the superposed surface to form an adhesive layer having irregularities on the surface. In the method of the present invention ,
The surface of the adhesive layer having the unevenness is approximately 1 to 10 kg / cm ^2.
By pressing with pressure, excessive protrusion on the surface is pressed
By adjusting the degree of unevenness properly,
Improves blocking properties. In this way, an information carrying sheet can be easily created.

The created information carrying sheet is used as a postcard having a confidentiality such as a three-fold postcard, a two-fold postcard, a partially folded postcard, and a superposed postcard.

[0015] Further, the information carrying sheet is formed on the uneven surface of the adhesive layer provided on the overlapping surface by a conventional method.
The required information is printed or printed, and is used as a concealed information carrying sheet by superimposing and adhering, and as an example, a dimensional enlargement in which at least one of the layers of the adhesive composition on the superposed surface is a surface on which the concealed information is written. Possible organizing sheets, printing paper, copy paper, and the like.

As described above, the created information carrying sheet is used in the form of various types of postcards such as three-folded postcards, two-folded postcards, partially folded type postcards, and cards. As an example of the form of these postcards, cards, etc., for example, a three-fold postcard shown in FIG. 1 prints a title, an entry column, and the like on the information carrying sheet of the present invention as necessary, and forms a printer transfer hole. It is provided with a folded part for tri-fold provided on both side ends, and as shown in FIG.
First, the notification information is printed on the adhesive layer 1 on the superimposed surface of the front surface, and the address is printed on the surface that is exposed when the information is superimposed.
Fold along and overlap 4 and then the adhesive layer 1 on the surface
Is folded along the dotted line portion 3 ', and is superimposed on the adhesive layer 1 to give an adhesive bonding condition and adhere. Also, the two-fold postcard shown in FIG. As in the case of 1, the information carrying sheet is subjected to predetermined printing as required, and a transfer hole and a folded portion are formed. FIG. 3 is a partially folded type postcard.

In the case of the postcards shown in FIGS. 2 and 3, as shown in FIGS. 6 and 7, notification information is printed on the adhesive layer 1 on the superposed surface, and address information is printed on the exposed surface. The portion provided with the adhesive layer 1 is folded along the dotted line portion 3 ', and the surfaces of the adhesive layers are overlapped with each other to provide an adhesive bonding condition and bond. In the case of the type shown in FIG. 4, the adhesive layers 1 and 2 are provided on the overlapping surface, and the adhesive layers 1 and 2 on this surface are brought into contact with each other and the surfaces are overlapped and bonded.

Although the case where the information carrying sheet is used in the form of a postcard has been described above as an example, the present invention can be widely applied to various other notification cards and the like. For example, an adhesive layer is provided on the entire back surface of the sheet, and the information is provided on the front surface side. After printing and writing, glue the adhesive layer by folding it in two, create a sheet with information on both front and back, peel off the adhesive surface when necessary, spread the information surface on the same surface, An adhesive layer may be appropriately provided on the entire surface or a part of the front and back surfaces of the sheet, or both surfaces, or one surface of the sheet, depending on the folded form of the sheet and the purpose of use, such as arrangement and storage. Also, in order to easily perform peeling after bonding,
It may be configured such that a step is generated in the sheet overlapped at the end opposite to the folded portion of the sheet, and a finger hook portion may be formed,
Alternatively, an unbonded portion may be formed on one end side to form a finger hook portion.

[0019]

EXAMPLES Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. The peel strength was measured using a tensile tester, Autograph AGS 50, manufactured by Shimadzu Corporation, and evaluated according to the following symbols. ◎: Excellent, ○: Good, △: Acceptable, ×: Not Acceptable

Example 1 A terpene resin as a tackifier was added to a natural rubber latex obtained by graft copolymerizing 2 parts by weight of styrene and 10 parts by weight of methyl methacrylate (MMA) with respect to 100 parts by weight of natural rubber. 5 parts by weight were added to prepare a base adhesive. Next, 50 parts by weight of silica gel having an average particle size of 4 μm and 150 parts by weight of wheat starch having an average particle size of 15 μm were added to 100 parts by weight of the base adhesive to prepare a pressure-sensitive adhesive composition. Next, this adhesive composition is
A 70 kg high quality paper was coated using a wire bar so that the coating amount was 50 g / m ² (solid content conversion), and then dried at 100 ° C. for 1 minute to prepare a test sample. Then, the test sample was heated at 180 ° C. for 2 hours.
After heating for an hour, the pressure of the dry sealer was increased to 0.5 kg /
After bonding under pressure while changing the pressure to cm ² , 50 kg / cm ² and 100 kg / cm ² , the peel strength was measured. Table 1 shows the results.

Example 2 Example 2 was carried out in the same manner as in Example 1 except that the amount of wheat starch was changed to 250 parts by weight. Table 1 shows the results.

Example 3 Example 3 was carried out in the same manner as in Example 1 except that the amount of silica was changed to 100 parts by weight and the amount of wheat starch was changed to 200 parts by weight. Table 1 shows the results.

Example 4 The amount of styrene was 8 parts by weight and the amount of MMA was 1 in Example 1.
Except having changed to 6 weight parts, it implemented similarly to Example 1. Table 1 shows the results.

Example 5 The same operation as in Example 4 was carried out except that the amount of wheat starch in Example 4 was changed to 250 parts by weight. Table 1 shows the results.

Example 6 Example 4 was carried out in the same manner as in Example 4 except that the amount of silica was changed to 100 parts by weight and the amount of wheat starch was changed to 200 parts by weight. Table 1 shows the results.

Example 7 NBR latex "Nipol 5161" (trade name, manufactured by Zeon Corporation, nitrile ratio 40%, solid content 41%) 10
A base adhesive was prepared by adding 100 parts by weight of "Nopco B-1" (trade name: manufactured by San Nopco, an aliphatic petroleum hydrocarbon resin, solid content: 46%) as a tackifier to 0 parts by weight. Then, for 100 parts by weight of the base adhesive,
50 parts by weight of silica gel having an average particle size of 4 μm and an average particle size of 1
A pressure-sensitive adhesive composition was prepared by adding 150 parts by weight of 5 μm wheat starch. Next, this adhesive composition was coated on a 70 kg high quality paper using a wire bar in a coating amount of 50 g.
/ M ² (in terms of solid content), dried at 100 ° C. for 1 minute to prepare a test sample, and the peel strength was measured in the same manner as in Example 1. Table 1 shows the results.

Example 8 In the same manner as in Example 7 except that the NBR latex of Example 7 was changed to SBR latex "Nipol LX204" (trade name: manufactured by Zeon Corporation, styrene ratio 55%, solid content 41%). Carried out. Table 1 shows the results.

Example 9 The NBR latex of Example 7 was replaced with a chloroprene latex “DENKA CHRORO PURENE LA-
50 "(trade name: manufactured by Denki Kagaku Kogyo Co., Ltd., solid content: 50%), and the same procedure as in Example 7 was carried out. Table 1 shows the results.

[0029]

[Table 1]

Example 10 A heat-sensitive adhesive composition was prepared by adding 150 parts by weight of wheat starch having an average particle size of 15 μm to 100 parts by weight of vinyl acetate copolymer # 3316 (trade name, manufactured by Fuller Japan Co., Ltd.). Thereafter, a test sample was prepared in the same manner as in Example 1, the test sample was bonded, heated at 180 ° C. for 2 seconds and allowed to cool, and the peel strength was measured when not pressed and when pressed at 500 g / cm ^2. did. Table 2 shows the results.

Example 11 Example 10 was carried out in the same manner as in Example 10, except that 120 parts by weight of silica having an average particle size of 4 μm was used instead of 150 parts by weight of wheat starch. Table 2 shows the results.
Shown in

Example 12 Water-soluble polymer compound [trade name, KR, manufactured by Koyo Kako Co., Ltd.]
954] A rewet adhesive composition was prepared by adding 450 parts by weight of silica having an average particle diameter of 4 μm to 100 parts by weight, and then a test sample was prepared in the same manner as in Example 1 to measure the adhesive strength. . Table 2 shows the results.

Example 13 Example 13 was carried out in the same manner as in Example 12, except that 450 parts by weight of silica was replaced by 400 parts by weight of calcium carbonate having an average particle size of 2 μm. Table 2 shows the results.
Shown in

[0034]

[Table 2]

[0035]

According to the present invention, the production of the information carrying sheet is
Before bonding the sheets,
By pressing the adhesive layer surface having irregularities formed in
Presses excessive protrusion on the surface, and adjusts the degree of unevenness properly
By adjusting to, there is no risk of blocking due to the adhesive due to stacking during the storage of the sheet, and it is possible to easily feed the printer to the printer at the time of writing the information and fix the print with various printers, and to remove the sheet after bonding. An extremely easy-to-use information carrying sheet that can be easily peeled off, does not cause blocking after peeling, and has a double-sided area where writing and printing can be performed, is a conventional adhesive film laminate. Compared to those used, it is economically advantageous at a low production cost.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of a usage form of a three-fold postcard.

FIG. 2 is an explanatory diagram showing an example of a usage form of a two-fold postcard.

FIG. 3 is an explanatory view showing an example of a usage form of a partially folded type postcard.

FIG. 4 is an explanatory view showing an example of a usage form of a type in which adhesive layers on a superposed surface are brought into contact with each other.

FIG. 5 is an explanatory view of a folded state in FIG. 1;

FIG. 6 is an explanatory view of a folded state in FIG. 2;

FIG. 7 is an explanatory view of a folded state in FIG. 3;

[Explanation of symbols]

 1 front surface adhesive layer 2 back surface adhesive layer 3, 3 'fold line

Claims (1)

(57) [Claims] [Claim 1] and surface superposed at least a portion of the base sheet surface, by carrying information on the overlapping surface, the information bearing sheet creation method used to bond the mating surfaces together, first said lap the mating surface, an adhesive layer having an uneven surface the non-peelable adhesive composition comprising a non-affinity particulate filler is applied to form, then, the uneven
By pressing the adhesive layer surface with
Press the protrusion and adjust the degree of unevenness appropriately.
A method for producing an information carrying sheet comprising :