JP3857786B2 - Paper with pressure sensitive adhesive - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper with a pressure-sensitive adhesive, for example, a mail form for a confidential postcard, etc. In particular, the present invention relates to a paper with a pressure-sensitive adhesive suitable for using recycled paper.
[0002]
[Prior art]
In recent years, mail forms have been widely used in which necessary information is printed with a printer etc. for direct mail from companies, financial institutions, government offices, etc. .
Conventionally, a paper with a pressure-sensitive adhesive used for this type of mail form has a base material with a smooth surface and high surface strength, for example, high-quality paper for non-impact printers (hereinafter referred to as NIP), coating. Using paper-based paper or the like, information common to the recipient is printed on the base material, and a pressure-sensitive adhesive is applied on the printed information.
Then, on the mail form using the pressure-sensitive adhesive-prepared paper produced in this way, different information (name, etc.) is printed for each recipient, folded with the printed side facing down, and shipped after bonding. .
[0003]
[Problems to be solved by the invention]
In recent years, there has been an increasing social demand for the use of recycled paper in order to save resources and protect the environment. However, it has been difficult to produce paper with pressure sensitive adhesive using recycled paper as a base material by conventional methods.
[0004]
In general, recycled paper is produced by dissolving ordinary paper again, so that the fibers constituting the paper are short, many fiber ends are exposed on the surface, and the paper surface has many irregularities. For this reason, recycled paper has a high hygroscopic property, and the paper may be curled or printed. This is because NIP performs printing by attracting ink electrically, but electricity flows on the water-absorbed paper and the ink cannot be attracted.
[0005]
In addition, since recycled paper has many irregularities on the surface of the paper as described above, even if a paper with a pressure-sensitive adhesive is produced using the recycled paper by a conventional method, the concave portion on the surface of the recycled paper as a base is used. As a result, the adhesive was absorbed, resulting in coating unevenness and a uniform adhesive force.
As countermeasures, applying an adhesive that fills the concaves on the surface of the recycled paper used as the base increases the cost, increases the paper curl after drying the adhesive, and prints on paper. There were problems such as being unable to print cleanly due to the impact of the printer.
[0006]
Furthermore, as described above, the recycled paper has short fibers constituting the paper, so that the fibers are easy to come off and paper dust is often generated. For this reason, when the adhesive for the paper with pressure sensitive adhesive is applied, the fibers that have fallen out are mixed into the adhesive and become hardened, and a uniform adhesive layer cannot be formed. In addition, the paper dust of the fibers that have fallen out adheres to the surface of the paper, so when printing on the paper, it is printed from the top of the paper dust, and then the paper dust falls off and there are holes in the printed characters. Etc. occurred, and there was a problem that printing could not be performed cleanly.
[0007]
An object of the present invention is to provide an inexpensive paper with a pressure-sensitive adhesive that can be printed neatly even when recycled paper or the like is used.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention of claim 1 includes a base material (11) and a smooth layer (12) which is formed on at least the base material (11) and smoothes the surface of the base material (11). And a pressure-sensitive adhesive-formed paper comprising a pressure-sensitive adhesive layer (13) formed on the smooth layer (12) and coated with a pressure- sensitive adhesive, and formed between the substrate and the smooth layer. A sheet (20) with a pressure-sensitive adhesive comprising an information display layer (24) displaying predetermined information.
[0010]
The invention of claim 2 comprises a base material (11), a smooth layer (12) formed on at least the base material (11) and smoothing the surface of the base material (11), and a smooth layer (12). In a paper with a pressure-sensitive adhesive formed on and including a pressure-sensitive adhesive layer (13) coated with a pressure-sensitive adhesive, formed between a smooth layer and a pressure-sensitive adhesive layer, A paper (30) with a pressure-sensitive adhesive, comprising the displayed information display layer (34).
[0011]
The invention according to claim 3 is the pressure-sensitive adhesive paper according to claim 1 or 2, wherein the base material (11, 21, 31) is made of recycled paper. It is paper with adhesive.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.
(First embodiment)
FIG. 1 is a view showing a stacked state of a first embodiment of a paper with a pressure-sensitive adhesive according to the present invention.
The paper 10 with pressure-sensitive adhesive has a base material 11, a smooth layer 12, and a pressure-sensitive adhesive layer 13.
[0013]
The base material 11 is a base material that serves as a carrier for the paper 10 with pressure-sensitive adhesive, and is made of recycled paper.
Recycled paper is paper produced by reprocessing waste paper, and the content of waste paper contained varies. There are many irregularities on the surface, the texture is rough, paper dust is generated, and it is easy to adhere to the surface. Generally, it is not often used for paper with pressure sensitive adhesive.
[0014]
The smooth layer 12 is a layer formed on the substrate 11, and medium ink, polyvinyl alcohol, polyester resin, and the like are preferably used. Specifically, a transparent medium ink manufactured by The Inktec may be used as the medium ink. The smooth layer 12 fills the unevenness that exists in a large amount on the surface of the substrate 11 and smoothes the surface.
[0015]
The pressure-sensitive adhesive layer 13 is a layer to which a pressure-sensitive adhesive that adheres in a peelable manner by applying pressure is applied.
The pressure-sensitive adhesive layer 13 can be formed using, for example, a pressure-sensitive adhesive disclosed in Japanese Patent Laid-Open No. 8-48156.
That is, an inorganic filler such as microsilica, an additive such as corn starch, and a silane coupling agent such as γ-mercaptopropyltrimethoxysilane are added to the adhesive main agent such as natural rubber latex in a certain ratio, and further if necessary. An adhesive prepared by adding a resin or other additive that is not compatible with the adhesive main agent, such as polyvinyl alcohol, is applied as a pressure sensitive adhesive, and a peelable pressure sensitive adhesive layer 13 is formed. Can be formed.
[0016]
The paper 10 with pressure-sensitive adhesive is produced as follows.
(1) The smooth layer 12 is formed by applying a medium ink or the like to the raw material of the substrate 11 by a rotary method such as an offset method.
At this time, the paper powder of the base material 11 adheres to the roller of the offset rotary press, and the paper powder is removed from the base material 11.
(2) A pressure sensitive adhesive layer 13 is formed by applying a pressure sensitive adhesive to the original fabric produced in (1) with a gravure printing machine or the like.
Thus, the paper 10 with pressure-sensitive adhesive can be produced.
[0017]
According to this embodiment, there are the following features.
(1) The surface of the base material 11 is protected by the smooth layer 12, and curling due to moisture absorption of the base material 11 can be prevented.
(2) Since the unevenness of the substrate 11 is filled with the smooth layer 12, the adhesive can be saved.
Since the medium ink used for the smooth layer 12 is cheaper than the adhesive, the cost of the paper with pressure sensitive adhesive can be reduced.
In addition, paper curl after drying the adhesive can be suppressed.
(3) Since the surface of the base material 11 is smoothed by the smooth layer 12, the adhesive can be applied uniformly and the adhesive force is stable.
In addition, the adhesive can be applied thinly, and is less susceptible to the impact of the printer when printing, and can be printed neatly.
(4) Since paper dust is removed when the smooth layer 12 is applied, a uniform pressure-sensitive adhesive layer 13 can be obtained, and the adhesive force is stable.
Further, it is possible to prevent such a problem that printing is performed from above the paper powder and a printed character is perforated.
[0018]
(Second Embodiment)
FIG. 2 is a view showing a stacked state of the second embodiment of the sheet with pressure-sensitive adhesive according to the present invention.
In addition, the part which fulfill | performs the same function as 1st Embodiment mentioned above attaches | subjects the code | symbol with the same end, and it abbreviate | omits the overlapping description suitably.
The paper 20 with pressure-sensitive adhesive is formed between the base material 21 and the smooth layer 22 with respect to the paper 10 with pressure-sensitive adhesive, and includes an information display layer 24 that displays predetermined information.
[0019]
The information display layer 24 is a layer formed on the base material 21 and below the smooth layer 22, and is a layer that displays common information regardless of the recipient of the paper 20 with pressure-sensitive adhesive. That is, for example, when creating a direct mail with the paper 20 with pressure-sensitive adhesive, it is preferable to print a company advertisement, an illustration for decorating the direct mail, or the like.
As a printing method of the information display layer 24, offset printing or the like is preferably used.
[0020]
The smooth layer 22 is preferably transparent or translucent so that the information displayed on the information display layer 24 is visible.
[0021]
The paper with pressure-sensitive adhesive 20 is produced as follows.
(1) The information display layer 24 is formed on the raw material of the base material 21 by performing offset printing or the like on a corporate advertisement or the like.
Due to the printing pressure at this time, the irregularities on the surface of the substrate 21 are crushed and become smaller.
(2) Based on the original fabric produced in (1), the smooth layer 22 and the pressure sensitive adhesive layer 23 are formed by the same method as the production method of the paper 10 with pressure sensitive adhesive.
With the above, a paper 20 with a pressure sensitive adhesive can be produced.
[0022]
According to this embodiment, since the information display layer 24 is provided, the paper 20 with pressure-sensitive adhesive can be designed in various ways. Moreover, since the information display layer 24 is formed under the pressure-sensitive adhesive layer 23, the ink of the information display layer 24 is not peeled off when the recipient opens the information display layer 24.
[0023]
(Third embodiment)
FIG. 3 is a view showing a stacked state of a third embodiment of the paper with pressure-sensitive adhesive according to the present invention.
The paper 30 with pressure-sensitive adhesive is formed between the smooth layer 32 and the pressure-sensitive adhesive layer 33 with respect to the paper 10 with pressure-sensitive adhesive, and includes an information display layer 34 that displays predetermined information.
[0024]
The information display layer 34 is a layer formed on the smooth layer 32 and below the pressure-sensitive adhesive layer 33, and is a layer that displays common information regardless of the recipient of the paper 30 with the pressure-sensitive adhesive. It is.
[0025]
The paper 30 with pressure-sensitive adhesive is produced as follows.
(1) The smooth layer 32 is formed by applying a medium ink or the like to the raw material of the base material 31 by a rotary method such as an offset method.
At this time, the paper powder of the base material 31 adheres to the roller of the offset rotary press, and the paper powder is removed from the base material 31.
(2) The information display layer 34 is formed on the raw material of the base material 31 by offset printing or the like for a corporate advertisement.
(3) Based on the original fabric produced in (2), the pressure-sensitive adhesive layer 33 is formed by the same method as the production method of the paper 10 with pressure-sensitive adhesive.
With the above, a paper 30 with a pressure sensitive adhesive can be produced.
[0026]
According to the present embodiment, since the information display layer 34 is formed on the smooth layer 32, if the smooth layer 32 is colored, for example, white, the information display layer 34 is displayed regardless of the color of the base material 31. A paper with a pressure-sensitive adhesive in which the layer 34 is easy to see can be provided.
[0027]
(Deformation)
The present invention is not limited to the embodiment described above, and various modifications and changes are possible, and these are also within the equivalent scope of the present invention.
For example, the base material is not limited to recycled paper, and high-quality paper or the like may be used. In particular, fine-grained paper or the like having a coarse mesh is suitable.
[0028]
【The invention's effect】
As described above in detail, according to the invention of claim 1, since the smooth layer is provided, the surface of the substrate can be smoothed and the adhesive can be applied uniformly. Moreover, generation | occurrence | production of paper dust can be prevented.
[0029]
According to the invention of claim 2, since the information display layer is provided, the paper with pressure-sensitive adhesive can be variously designed.
[0030]
According to the invention of claim 3, since the information display layer is provided on the smooth layer, it is possible to produce a paper with a pressure-sensitive adhesive that allows easy viewing of the information display layer regardless of the color of the substrate.
[0031]
According to the invention of claim 4, since the substrate is made of recycled paper, it is effective for resource saving and environmental protection.
[Brief description of the drawings]
FIG. 1 is a view showing a stacked state of a first embodiment of a sheet with a pressure-sensitive adhesive according to the present invention.
FIG. 2 is a diagram illustrating a stacked state of a second embodiment of a sheet with pressure-sensitive adhesive according to the present invention.
FIG. 3 is a diagram showing a stacked state of a third embodiment of a sheet with pressure-sensitive adhesive according to the present invention.
[Explanation of symbols]
10, 20, 30 Paper with pressure sensitive adhesive 11, 21, 31 Base material 12, 22, 32 Smooth layer 13, 23, 33 Adhesive layer 24, 34 Information display layer

Claims (3)

A substrate;
A smooth layer that is formed on at least the substrate and smoothes the surface of the substrate;
A pressure-sensitive adhesive layer formed on the smooth layer and coated with a pressure-sensitive adhesive;
In paper with pressure sensitive adhesive containing
A paper with a pressure-sensitive adhesive, comprising an information display layer formed between the base material and the smooth layer and displaying predetermined information. A substrate;
A smooth layer that is formed on at least the substrate and smoothes the surface of the substrate;
A pressure-sensitive adhesive layer formed on the smooth layer and coated with a pressure-sensitive adhesive;
In paper with pressure sensitive adhesive containing
A paper with pressure-sensitive adhesive, comprising an information display layer formed between the smooth layer and the pressure-sensitive adhesive layer and displaying predetermined information. In the paper with a pressure-sensitive adhesive according to claim 1 or 2 ,
The paper with pressure-sensitive adhesive, wherein the substrate is made of recycled paper.

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