JPH06155967A - Security mail form - Google Patents

Abstract

PURPOSE:To enable a security mail form to be easily unsealed by applying a corner cut and a perforation to a side fringe part of a close adhesion surface and to provide an extremely high secret keeping property by making a secret information surface unable to be unsealed by peeling off unless a side fringe part of a mail form folded in three is cut off. CONSTITUTION:A security mail form is constructed as follows; a weak pressure- sensitive adhesive layer 1 which is stuck by pressure is provided to almost the whole of a surface intended for being stuck fast to of a base material; a strong adhesive layer 13 incapable of peeling off is provided to side fringe parts of surfaces B, C which are stuck fast to each other after printing secret information on them; and further a corner cut 15 and a perforation 16 are provided at a position for start of unsealing by peeling off of the side fringe part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mail form for use as a secret post having a weak adhesive layer formed on the entire surface of a base material, and in particular, it has a peeling-free property on a side edge portion of a contact surface on which secret information is printed. It concerns a possible strong adhesive layer and a security mail form with perforations and corner cuts for opening.

[0002]

2. Description of the Related Art Conventionally, sealed letters have been used for confidential information such as notifications from financial institutions and government offices. For such envelopes, a three-fold mail form in which a mail form itself is folded, and then the peripheral envelope is sealed and sent, is currently the mainstream. This tri-fold form prints confidential information such as the balance of deposits and the amount of borrowed money, and leaves it in the form of an envelope as it is. Therefore, enclosing and sealing work is unnecessary, and the recipient and the confidential information can be printed on the same surface. Therefore, a high-speed printer such as a non-impact printer (NIP) can print at one time, and efficient processing can be performed. However, since the tri-fold mail form is sealed only by the pressure sensitive adhesive on the peripheral part, it is treated as an "envelope" by the postal method and as a "postcard".
The postage is higher than.

[0003] On the other hand, notifications of payment of pensions and reminder letters of unpaid tax are often notified by postcards, and there have been many complaints that privacy cannot be protected. For this reason, the mail form is folded in half or three to make it the size of a postcard, the secret information is entered inside, and the mail form is attached and mailed as a postcard, and the recipient peels off between the mail forms. Secret postcards that allow you to read confidential information by opening
Partly implemented.

8 and 9 are views showing a conventional example of a secret postcard. The secret postcard 2 has mail sheets 21 and 22 arranged in series, and is in a form of being folded in half at the center. Address information 23 is printed on the outside of the mail sheet 21 and secret information 24 is inside the mail sheets 21 and 22. Is entered. The insides of the mail sheets 21 and 22 are adhered to each other by a laminated adhesive sheet 25.
In this state, the postcard can be mailed and the confidential information 24 cannot be read by a third party. If the recipient peels off the layers of the laminated adhesive sheet 25, the recipient can open the confidential information 24 without damaging the confidential information 24 and read the confidential information 24.

The secret postcard 3 is a mail sheet 3
1, 32 and 33 are arranged in series and are folded in three. The address information 23 is printed on the outside of the mail paper 31, and the confidential information 24 is printed on the inside of the mail paper 32 and the surface of the mail paper 33 opposite to it. Since the printing is performed, the address information 23 and the secret information 24 can be printed by printing once. Mail form 31,
The space 32 is completely adhered, and the space between the mail papers 32 and 33 is adhered to the entire surface by a weak adhesive layer so as to be removable again.

[0006]

However, the former secret postcard 2 and the latter secret postcard 3 are
Since the confidential information print section is only adhered to the removable weak adhesive layer, a third party other than the addressee can easily peel off the weak adhesive layer without damaging the mail paper and keep confidential information. You can see. An object of the present invention is to provide a security mail form in which the weak adhesive layer on which confidential information is printed cannot be peeled off unless the addressee cuts off the strong adhesive portion of the mail paper along the perforations. In addition, a corner cut is provided to facilitate opening when peeling off the weak pressure-sensitive adhesive layer.

[0007]

In order to solve the above-mentioned problems, the security mail foam according to the present invention has a pressure-sensitive adhesive layer formed of a weak pressure-sensitive adhesive that adheres to almost the entire planned adhesion surface of a substrate by pressure. Then, a secret information printing layer is formed on the surface of the pressure-sensitive adhesive layer, the base material is folded or laminated, and the pressure-sensitive adhesive layers are adhered to each other on the opposite surfaces to conceal the printing layer, A mail form for peeling from an adhesive layer, wherein a non-peelable strong adhesive layer that is adhered by pressure is formed on a side edge portion of a secret information printing surface when the base material is folded or laminated, A security mail form that reads the confidential information by cutting the perforation for opening at the side edge. In addition, a corner cut is provided at the peeling start position of the mail sheet in order to facilitate peeling between the weak adhesive layers during reading.

[0008]

The present invention will be described in detail below with reference to the drawings and the like. (Embodiment 1) FIG. 1 is a view showing an embodiment of a security mail form 1 according to the present invention. FIG. 2 shows I- of FIG.
I sectional view. FIG. 3 is a view showing a state in which the mail form of the embodiment is folded back and closely attached. As shown in FIG. 1, the security mail form 1 is a paper which is usually three times the size of a postcard (standard size postcard), and is used by folding the planned folding lines p and q indicated by the two-dot chain line in three. , The left column A side is the public information entry area X where the address information is entered, the middle column B side and the right column C side is the secret information entry area Y where the confidential information is entered, and is for opening on the side edge of the C side There are perforations and a corner cut for opening. FIG. 2 shows the security mail form 1 cut along the line I-I of FIG. 1, in which the weak adhesive layers 12 are formed on both sides of the base material 11. Also, this security mail form 1
The non-peelable strong adhesive layers 13A to 13D that are bonded continuously or discontinuously are formed at the side edges when the sheets are folded back and brought into close contact with each other. At this time, if the surfaces to which the strong adhesives 13C and 13D are applied do not require peeling, it is sufficient to form only the strong adhesive layer on the entire surfaces to be adhered. FIG. 3 shows a state in which the security mail form 1 is printed to form the print layer 14 and then the print mail layer 1 is folded and sealed.

Next, the layer structure will be specifically described. The base material 11 is usually white fine paper, but if the surface is roughened by corona treatment or matte treatment, use synthetic resin films such as PET, PE, PP and vinyl chloride. You can also The pressure-sensitive adhesive used for the weak pressure-sensitive adhesive layer 12 is adjusted so as to facilitate the adhesion and re-peeling of the adhesion surface, and the adhesive main agent, the adhesion control agent, the additives, etc. described below are Are mixed in proportion. Adhesive main agent 100 parts by weight Adhesion control agent In the case of needle-shaped substances 10-100 (preferably 10-50) parts by weight In the case of fine-grained substances 0-50 (preferably 5)
30) parts by weight When the above two substances are mixed 10 to 100 parts by weight Additive wax 0.01 to 20 parts by weight UV absorbers trace amount defoaming agent trace amount defoaming aid trace amount emulsifying component water 100 to 500 (preferably 200)
To 300) parts by weight emulsifier 0.5 to 2 parts by weight resin 1 to 50 parts by weight

[Adhesive Main Agent] The adhesive main agent is a natural rubber (N
R), esterified natural rubber, styrene butadiene rubber (SBR), chloroprene rubber, polyvinyl acetate, polymethylmethacrylate (PMMA) and the like, or a mixture thereof. In mixing these adhesive main agents, by appropriately adjusting the mixing ratio, the adhesiveness to the base material can be made higher than the adhesiveness while maintaining the self-adhesiveness between the pressure-sensitive adhesives. Preferably, a natural rubber having a high property of exhibiting self-adhesiveness between pressure-sensitive adhesives under pressure is added with polymethylmethacrylate or styrene-butadiene rubber for the purpose of enhancing the adhesiveness with a base material, that is, the anchor effect. Is mentioned. Polymethylmethacrylate is preferably used as a mixture with another adhesive main agent rather than used alone. As such an adhesive main agent, fine particles having a particle size of about 0.1 μm to 3 μm are usually used.

[Adhesive Strength Adjusting Agent] The adhesive strength adjusting agent is mixed in order to adjust the adhesive strength of the adhesive main agent, and a needle-like substance or a fine particulate substance or a mixture thereof is used. Needle-like substance As the needle-like substance, any of an inorganic substance and an organic substance may be used, as long as the shape thereof is substantially needle-like, flat, spiral,
Although it is arbitrarily selected from those having various forms such as scales, a needle-shaped substance is particularly preferable. The needle-shaped substance has an average length of 10 μm to 20 μm and an average diameter of 0.2.
It is preferably about μm to 0.5 μm. Needle-like substances
It is preferable that the pressure-sensitive adhesive be an emulsion and have an apparent specific gravity of 0.05 to 0.6 in order to reduce the sedimentation property when it is used as a coating agent. Further, in consideration of printing processing and NIP suitability, a needle-shaped substance Has an elastic modulus of 10000 kg / mm ²
It is preferably about 40,000 kg / mm ² . Examples of such needle-like substances include glass fiber, carbon fiber, P
AN-based fibers, metal crystals, metal compound crystals, and the like,
The adhesive main agent may be one that has no affinity (compatibility). A preferable acicular substance is a crystal of potassium 6-titanate (K ₂ O.6TiO ₂ ), which has no compatibility with water but an affinity and an apparent specific gravity of 0.2.
(True specific gravity = 3.3), elastic modulus 28,000 kg / mm ²
And is suitable as a pressure-sensitive adhesive component.

Fine particulate matter The fine particulate matter includes micro silica, synthetic zeolite, activated alumina gel, calcium carbonate, zinc oxide, titanium oxide, talc, clay, kaolin, activated clay, acrylic beads, starch, cellulose, shirasu balloon and the like. The particles having a particle size of 10 mμm to 30 μm, preferably 0.5 μm to 10 μm are suitable.
Further, by adding together with the needle-shaped substance, it is possible to reduce the addition amount of the fine-grained substance and prevent the fine-grained substance from falling off.

[Additives] As additives, waxes such as polyethylene wax and carnauba wax are added to improve handling properties, slipperiness such as NIP transport performance or blocking resistance, and ammonia is added to prevent deterioration. UV absorbers such as ethanolamine may be added. Further, as an antifoaming agent, a nonionic surfactant,
An anionic surfactant (mineral oil type) may be added, or silica or the like may be added as a defoaming aid.

[Emulsifying Component] The above-mentioned tackifying main agent, tackiness adjusting agent, and additives are dispersed in a medium such as water and applied to a substrate in an emulsion state. When emulsifying, an emulsifier is added if necessary. As the emulsifier, oleic acid soap, potassium castor oil soap, casein, glue, gelatin and the like can be used. Further, in order to prevent secondary aggregation of the adhesive main agent when emulsified, a resin having no affinity with the adhesive main agent can be added. As this resin, a water-dispersible polymer polyester,
Thermoplastic elastomer, low molecular weight polyethylene such as low density polyethylene, ionomer, vinyl acetate-olefin copolymer and the like can be preferably used.

The coating amount of such a pressure sensitive adhesive is 0.1 g / m ^{2 to} 10 g / m ² , preferably 1.0 g after drying.
/ M ^{2 to} 3.0 g / m ² is preferable. Within this range, when printing or printing from the pressure-sensitive adhesive, the ink can penetrate through the pressure-sensitive adhesive and reach the substrate, and transfer of the printing layer when peeled off can be prevented. . Furthermore, blocking, piling (powder drop), etc. can be prevented, and sufficient adhesion and printability can be obtained.

Next, a method of using the security mail form 1 will be described. The security mail form 1 uses a printer such as NIP to display the address, name and other public information in the public information entry area X, and the secret information such as a maturity notice of the financial product in the secret information entry area Y once. Print on one side. Since public information and confidential information can be printed on one side at a time, the printing speed is fast and
Matching both information is easy and reliable.
After that, the security mail form 1 is bent from the planned folding lines p and q and folded in three, and the weak adhesive layer 12 is brought into close contact with the entire surface. At this time, as shown in FIG. 3, the strong adhesive layer 13A, the strong adhesive layer 13B, and the strong adhesive layer 13 are formed.
This means that C and the strong adhesive layer 13D have formed strong adhesion that cannot be peeled off. If the security mail form 1 is mailed in this state, the postage will be treated as a postcard. Figure 7
[Fig. 2] is a diagram showing a folded form of the security mail form 1 of the present invention and a diagram showing a process of opening. When the recipient tries to open it, the perforation 16 on the C-side edge where the strong adhesive layer 13A and the strong adhesive layer 13B are bonded is cut off, and the weak adhesive layer is delaminated from the corner cut portion 15. Then, the secret information Y can be read.

(Embodiment 2) FIG. 4 is a view showing an embodiment 1'of a security secret mail form according to the present invention, FIG. 5 is a sectional view taken along line JJ of FIG. 4, and FIG. It is the figure which showed the state which folded the example mail form and made it adhere. In addition, the same reference numerals will be given to the portions having the same functions as those in the above-described embodiments. In this example, the same weak adhesive and strong adhesive as in Example 1 were used.
By providing the weak pressure-sensitive adhesive layer 12 on the entire surface of the base material 11 and further making the strong adhesive layers 13E to 13H convex as shown in FIG.
Subtle registration is not required, and the strong adhesive layer becomes thicker, and when the pressure is applied by the sealer, relatively high pressure is applied, so that stronger adhesive force is obtained. Also,
As in the case of Example 1, when the surfaces to which the strong adhesives 13G and 13H are applied do not require peeling, it is sufficient to form only the strong adhesive layer on the entire surfaces to be adhered.

The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the present invention. The strong adhesive layer is a strip,
The shape is not limited to the spot shape, and may be one or more line shapes, may be formed continuously or discontinuously, or may be any pattern shape. If the lines of the strong adhesive layer are discontinuous, the so-called blocking phenomenon can be avoided when the strong adhesive layers contact each other when they are stacked or folded, and the mail forms adhere to each other due to their weight. it can. The security mail form is not limited to three-fold, and may be two-fold or four-fold or more, and the printing area and printing information are not particularly limited. It is desirable that the size and weight when folded are ordinary postcards defined by the Postal Law, but are not particularly limited in consideration of the usage form. The security mail form may be continuous paper or single-cut paper when printing information, and the printer is not limited to NIP, and a dot impact printer or the like may be used. Information such as confidential information can be printed on the security mail form as appropriate.

[0019]

As described in detail above, according to the present invention, the processing machine and processing steps for the three-fold mail form for envelopes, which is widely used at present, can be used as it is. In addition to the weak adhesive layer, a strong adhesive layer was formed on the side edge of the confidential information entry area for non-peelable adhesion, so open this security email form unless the opening sewing machine is cut off. The confidentiality of confidential information is guaranteed because it is not possible. When the addressee opens the package, the weak adhesive layer 12 in the secret information entry area Y can be easily peeled off by cutting the perforations from the corner cut portion.

[0020]

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of a security mail form according to the present invention.

FIG. 2 is a sectional view taken along the line II of FIG.

FIG. 3 is a diagram showing a state in which the security mail form of the embodiment shown in FIG.

FIG. 4 is a diagram showing a second embodiment of a security mail form according to the present invention.

5 is a sectional view taken along line JJ of FIG.

FIG. 6 is a diagram showing a state in which the security mail form of the second embodiment is folded back and closely attached.

FIG. 7 is a view of the security mail form according to the present invention when folded and viewed from the opening side.

FIG. 8A is a schematic diagram of a conventional example of a double-folded secret postcard. FIG. 8B is a diagram showing a conventional example of a double-folded secret postcard.

FIG. 9A is a schematic view of a conventional example of a tri-fold secret postcard. FIG. 9B is a diagram showing a conventional example of a tri-fold secret postcard.

[Explanation of symbols]

 1, 1'Security mail form 2 Two-fold secret postcard 3 Three-fold secret postcard 11 Base material 12 Weak adhesive layer 13A, 13B, 13C Strong adhesive layer 13D, 13E, 13F Strong adhesive layer 14 Printing layer 15 Corner cut 16 Perforations 21, 22 Mail paper 23 Address information 24 Confidential information 25 Laminated adhesive sheet 31, 32, 33 Mail paper A, B, C Mail paper surface D, E, F Mail paper surface X Public information entry area Y Confidential information Entry area G Planned cut p, q Planned bending line

Claims (2)

[Claims] 1. A base material is formed by forming a pressure-sensitive adhesive layer made of a weak pressure-sensitive adhesive that adheres by pressure on substantially the entire planned surface of the base material, and forming a secret information printing layer on the surface of the pressure-sensitive adhesive layer. Is a mail form in which the pressure-sensitive adhesive layers on the opposite surfaces are adhered to each other to conceal the printing layer and then peeled from the pressure-sensitive adhesive layer, and the base material is folded or laminated. A security mail form characterized in that a strong non-removable adhesive layer that adheres by pressure is formed on the side edge of the confidential information printing surface, and a perforation for opening is provided on the side edge. 2. The security mail form according to claim 1, wherein a corner cut is provided at a peeling start position between the weak adhesive layers.