JPH11116915A - Pseudo-adhesive sheet and its preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of difficulty in stripping off a pseudo-adhesive sheet, suitable for shipping tags or distribution tags in physical distribution management or for indicator labels in process control, by performing adhesive processing on the rear side of the pseudo-adhesive sheet, which comprises a layer exposed to pseudo-adhesion by a thermoplastic resin. SOLUTION: A pseudo-adhesive sheet A is obtained by extruding a thermoplastic resin on the rear side of a surface base material 21 and then exposing it to cooling and pressure-bonding using a cooling roller and a pressure roller. The pseudo-adhesive sheet A is peelable between the surface base material 21 and the thermoplastic resin layer 22. Here, a roller having recessed in the direction of rotation at some parts of the surface is used as the pressure roller, which produces non-pressure-bonded parts 25 in some parts of the surface base material 21 and the thermoplastic resin layer 22, which are laminated as pseudo- adhesive parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quasi-adhesive sheet including a layer quasi-adhered with a thermoplastic resin, and more particularly to a tag, a delivery slip, and a process control used for logistics control by applying an adhesive treatment to the back surface. The present invention relates to a pseudo adhesive sheet suitable as a display label to be used.

[0002]

2. Description of the Related Art Conventionally, a transportation company such as a department store, mail order, or courier service stacks a plurality of pressure-sensitive copying paper (eg, carbonless paper) for distribution management such as ordering, shipping, and receiving customers. A slip having a shape in which the lowermost layer is an adhesive sheet is used. When writing information such as a product name, a sender, and a destination on such a slip, it is necessary to apply strong pressure. Further, since pressure-sensitive copying paper is used, if a strong impact is applied during the distribution process, the color may be generated and the written information may be difficult to read. Furthermore, since a plurality of sheets of paper are stacked with a part of the sheets adhered, the sheets may be torn or peeled off during the distribution process.

In order to solve such a problem, in recent years,
A pressure-sensitive adhesive sheet (FIG. 3), which is pseudo-adhered so as to be peelable between the surface substrate and the thermoplastic resin layer, with a layer configuration of a surface substrate, a thermoplastic resin layer, an adhesive layer, and a release sheet. A method has been proposed. Information necessary for physical distribution management and a barcode of the information are printed out and displayed on the surface base material. The method of using the pseudo-adhesive pressure-sensitive adhesive sheet for a tag or the like is disclosed in Japanese Patent Publication No. 55-15035.

According to the disclosure of this publication, one or several kinds selected from thermoplastic resins such as polyethylene and polypropylene are melted at a temperature lower than a normal lamination temperature and extruded from a T-die of an extruder to form paper or the like. A pseudo-adhesive sheet is manufactured by laminating and cooling and solidifying the substrate, and a pseudo-adhesive sheet can be obtained by subjecting the pseudo-adhesive sheet to an adhesive process.

When such a pseudo-adhesive pressure-sensitive adhesive sheet is used for a tag or a delivery slip for logistics management, it is necessary to apply strong pressure when writing information when using a type in which a plurality of pressure-sensitive copying papers are stacked. If there is a strong impact during the distribution process, it will develop color and make the written information difficult to read,
Since a plurality of sheets of paper are stacked, defects such as tearing or peeling off during the distribution process are improved.

On the other hand, when one of the delivery slips attached to the baggage is turned over as a receipt when the baggage is delivered,
Delivery slips of the type with multiple sheets of pressure-sensitive copying paper have the advantage that they are very easy to turn over.However, when a pseudo-adhesive adhesive sheet is used for the delivery slip, the delivery slip is compared to the type with multiple sheets of pressure-sensitive copying paper stacked. It has the disadvantage that it is difficult to turn over.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a quasi-adhesive sheet suitable for a tag used for physical distribution management, a delivery slip, a display label used for process management, etc., in which the drawback that it is difficult to turn over is improved. .

[0008]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, when performing a pseudo-adhesion process, a thermoplastic resin is melted by an extruder, and the T-die of the extruder is melted. A non-compression part is formed in a part of the pseudo-adhesion sheet by providing a recess in the roll rotation direction (FIG. 1) in a part of the pressure-bonding roll used in the pseudo-bonding process of extruding from the lamination and cooling and solidifying. Was processed so as to be one end of the label which was the final product, and it was found that the unpressed portion could be turned over and the disadvantage that the pseudo adhesive sheet was hard to be turned off could be solved.

According to the present invention, there is provided a pseudo-adhesive, which is obtained by extruding a thermoplastic resin on the back surface of a front substrate and cooling and pressing the same with a cooling roll and a pressing roll, which can be separated between the front substrate and the thermoplastic resin layer. In the sheet, by using a roll having a concave portion in the roll rotation direction on a part of the surface as a pressure roll, it is possible to form an unpressed portion on a part of the surface base material and the thermoplastic resin layer laminated as a pseudo-adhesion portion. This is a pseudo adhesive sheet characterized by the following.

[0010] Further, the present invention is directed to a nip composed of a pressure roll and a cooling roll having a concave portion in the roll rotation direction on a part of the surface, and guiding the surface substrate so that the front side of the surface substrate is the pressure roll side, This is a method for producing a pseudo-adhesive sheet in which a thermoplastic resin extruded from a T-die and a surface substrate are pressure-bonded and laminated at the nip.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In general, a pseudo-adhesive sheet is prepared by subjecting a thermoplastic resin to a normal lamination temperature of 10 to 50 ° C.
Melt at a low temperature and extrude the molten thermoplastic resin from the T-die of the extruder onto the back side of a surface substrate such as paper sandwiched between a cooling roll and a pressure roll, and simultaneously laminate with the substrate while cooling. (Fig. 2).

The pseudo-adhesive sheet according to the present invention is subjected to pseudo-adhesion processing on the back surface of the front substrate in the same manner as a normal pseudo-adhesive sheet, but in the present invention, a roll rotating as shown in FIG. By providing a recess in the direction,
It is characterized in that a space is created between the concave portion of the press roll and the cooling roll, and a portion where the surface base material and the thermoplastic resin layer are not pressed is formed. The pseudo-adhesive sheet thus obtained can be made into a pseudo-adhesive pressure-sensitive adhesive sheet for a slip or the like by laminating an adhesive and a release sheet on a thermoplastic resin layer, for example.

The width of the concave portion of the pressure roll is 0.5 to 40 m.
m is preferable, and when the pseudo-bonding process is performed with a pressure-bonding roll having a concave portion having a width in this range, the width of the non-press-bonded portion of the pseudo-bonding sheet is 0.5 to 40 mm. The width of the unbonded portion of the pseudo adhesive sheet is preferably 0.5 to 20 mm. By the way, the width of the uncompressed part of the pseudo adhesive sheet is 0.5 m
If it is less than m, it is difficult to obtain the desired effect of turning over. On the other hand, if the width of the unbonded portion is larger than 20 mm, it is not preferable because it may cause unintended peeling of the surface substrate. In addition, the width of the concave portion of the pressing roll is 20 to
When it is 40 mm, an uncompressed portion of 20 to 40 mm is formed, but by cutting so that the uncompressed portion becomes 20 mm or less, a preferable pseudo adhesive sheet is obtained. For example,
It has an area equivalent to two sheets, and forms a 40 mm-width non-pressed portion in the center, and cuts the center to obtain 20 m.
It is possible to obtain two pseudo adhesive sheets having an uncompressed portion having a width of m.

The depth of the concave portion of the pressure roll may be such that a space is provided between the cooling roll and the pressure roll in a state where the cooling roll and the pressure roll are pressurized under a pressure condition when the pseudo bonding is actually performed. There is no particular limitation if possible, but a sufficient effect can be obtained if it is 0.5 mm or more. For example, a roller in which a concave portion is formed by shaving the surface of the roll can be used, but a rubber sheet can be attached so that a concave portion is formed in the roll surface.

There may be a plurality of concave portions of the pressure roll, and the interval in this case is not particularly limited. However, it is necessary to determine the number and position of the concave portions of the pressure roll in accordance with the number of finished products and dimensions of the finishing width. is there. When there are a plurality of products having different finishing dimensions, it is necessary to prepare a press roll provided with a concave portion in accordance with each dimension. For example, as shown in FIG. 4, it is preferable to provide a concave portion in advance in the press roll so that the unpressed portion comes to one end or both ends when a cutting process is performed to finish the final product. Alternatively, as shown in FIG. 5, it is also preferable to provide a cut line such as a perforation or a half cut on the surface base material of the unpressed portion.

As the material of the pressure roll, a normal rubber roll or silicone rubber roll is preferably used, but is not particularly limited thereto. Also, the roll diameter is not particularly limited. In addition, it is preferable that the pressure roll has a cooling means externally or internally so as not to be heated during the production. For example, it is preferable to provide a cooling roll different from that for lamination so as to be in contact with the pressure roll.

As the surface base material used in the present invention, papers such as high-quality paper and kraft paper are preferably used, and special papers such as aluminum-evaporated paper, resin-impregnated paper, synthetic paper, and PET are used.
And films such as polyvinyl chloride and polyolefin. Further, a recording sheet having a recording layer such as a thermal transfer recording receiving layer, a heat-sensitive recording layer, and an ink jet recording layer can also be used, and the present invention is not particularly limited thereto. Above all, it is preferable to use recording sheets that can be recorded by various printers, and particularly heat-sensitive recording sheets are preferable because they are suitable for outputting slips and the like. The thickness of the surface substrate is not particularly limited, but is usually about 20 to 150 μm.

Examples of the thermoplastic resin used in the present invention include polyolefin polymers or copolymers such as polyethylene and polypropylene, and thermoplastic resins such as polystyrene, vinyl acetate copolymer and ethylene-vinyl acetate copolymer. Although a kind or a mixture of several kinds is used, it is needless to say that the present invention is not limited to these, and any thermoplastic resin can be used as long as a pseudo-adhesion effect can be obtained. The thickness of the thermoplastic resin layer is not particularly limited, but is usually 5 to 60.
μm, preferably about 10 to 50 μm. It should be noted that the thermoplastic resin has a temperature of 10 ° C. below the normal lamination temperature.
At a temperature lower by ５０50 ° C., for example, in the case of polyethylene resin 2
At 50-320 ° C, melted and extruded from T-die of extruder
The molten thermoplastic resin is extruded on the back surface of a surface substrate such as paper sandwiched between a cooling roll and a pressure roll.

As the pressure-sensitive adhesive used in the pressure-sensitive adhesive processing, known pressure-sensitive adhesives such as acrylic pressure-sensitive adhesives, natural rubber-based pressure-sensitive adhesives, synthetic rubber-based pressure-sensitive adhesives, and silicone-based pressure-sensitive adhesives are used, but of course are not limited thereto. It is not something to be done. The thickness of the pressure-sensitive adhesive layer is not particularly limited, but is about 5 to 60 μm, preferably about 10 to 40 μm.

Examples of the base material of the release sheet include paper base materials such as ordinary high-quality paper, kraft paper, and glassine paper, base materials obtained by subjecting these paper base materials to a lamination treatment such as polyethylene, PET, polypropylene, and the like. These substrates are formed by applying a release treatment such as silicone to the side of the substrate in contact with the pressure-sensitive adhesive layer. Although the thickness of the release sheet is not particularly limited, it is 20 to 15
0 μm, and preferably about 40 to 100 μm.

The present invention will be described in more detail with reference to the following Examples, but it should be understood that the present invention is by no means restricted thereto.

Example 1 A polyethylene resin (trade name: Mirason 16P, manufactured by Mitsui Petrochemical Industry Co., Ltd.) was applied to a T-die on the side opposite to the heat-sensitive recording layer of a heat-sensitive recording paper (thickness: 80 μm) of 78 g / m ² in U.S.A. Then, by a extrusion lamination method, the resin temperature was set to 300 ° C., the nip pressure between the cooling roll and the pressure roll was set to 1 kg / cm ² , and the lamination pressure was set to 40 μm to obtain a pseudo adhesive sheet. The pressure roll used at this time is made of silicone rubber, and has a width of 15 mm and a depth of 0.5 mm at the center of the roll.
Using a concave part in the roll rotation direction
An uncompressed portion having a width of 15 mm was formed at the center of the pseudo adhesive sheet having a width of mm. Then, an acrylic pressure-sensitive adhesive was applied to the resin layer side of the obtained pseudo-adhesive sheet so as to have a thickness of 15 μm, and then a silicone release-treated glassine paper of 64 g / m ² (60 μm in thickness) of rice tsubo was applied. The pseudo-adhesive pressure-sensitive adhesive sheet was obtained by laminating so that the release treated surface was in contact with the pressure-sensitive adhesive layer. Then
Slit the center of the pseudo-adhesive pressure-sensitive adhesive sheet to 100 m
Two sets of pseudo adhesive labels having a width of m were obtained. One end of this label had a width of 7 mm and the surface base material and the polyethylene resin layer were not pressed.

Example 2 A width of 3 m was applied to the center of the pressure roll during pseudo bonding.
m, in the same manner as in Example 1 except that an unpressed portion having a width of 3 mm was formed at the center of a pseudo-adhesive sheet having a width of 200 mm using a concave portion in the roll rotation direction having a depth of 0.5 mm. Two sets of pseudo-adhesive adhesive labels having a width of 100 mm were obtained.
One end of this label had a width of 1.5 mm and the surface base material and the polyethylene resin layer were not pressed.

Comparative Example 1 Two sets of pseudo-adhesive pressure-sensitive adhesive labels having a width of 100 mm were obtained in the same manner as in Example 1, except that a plain pressure-bonding roll having no concave portion was used during the pseudo-adhesion processing. At both ends of this label, the surface substrate and the polyethylene resin layer were pressure-bonded.

The pseudo-adhesive pressure-sensitive adhesive label thus obtained was actually affixed to a cardboard box, and the easiness of turning off the surface substrate was evaluated according to the following criteria. (Evaluation criteria) ◎: Very easy to turn over ○: Easy to turn over ×: Hard to turn over

[0026]

[Table 1]

As is clear from the table, by providing a concave portion in the roll rotation direction in a part of the pressure-bonding roll at the time of performing the pseudo-adhesion processing, an excellent pseudo-adhesion sheet having an improved disadvantage of being difficult to be turned off can be obtained. is there.

[0028]

According to the pseudo adhesive sheet of the present invention, when a type in which a plurality of pressure-sensitive copying papers are laminated is used, it is necessary to apply a strong pressure when writing information, There are no drawbacks, such as the difficulty in reading colored and written information, and the fact that multiple sheets of paper may be torn or peeled off during the distribution process due to lamination,
It can be said that this pseudo-adhesion sheet is an improvement in the conventional pseudo-adhesion type in that it is difficult to turn over, and is suitable for a tag used for physical distribution management, a delivery slip, and a display label used for process management.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a press roll having a concave portion used in the present invention.

FIG. 2 is a process diagram illustrating a process for producing a pseudo-adhesive sheet of the present invention.

FIG. 3 is a cross-sectional view of a conventional pseudo-adhesive pressure-sensitive adhesive sheet.

FIG. 4 is a cross-sectional view showing an example of the pseudo-adhesive pressure-sensitive adhesive sheet of the present invention.

FIG. 5 is a sectional view showing another example of the pseudo-adhesive pressure-sensitive adhesive sheet of the present invention.

[Explanation of symbols]

 11: Compression roll 12: Recess in roll rotation direction 13: Cooling roll 14: T die 15: Unwinder 16: Winder 17: Surface substrate 18: Pseudo-adhesive sheet A: Pseudo-adhesive sheet B: Pseudo-adhesive adhesive sheet 21: Surface Base material 22: Thermoplastic resin layer 23: Adhesive layer 24: Release sheet 25: Non-pressed portion 26: Cut line

Claims (11)

[Claims] 1. A pseudo-adhesive sheet which can be peeled between a surface base material and a thermoplastic resin layer, obtained by extruding a thermoplastic resin on the back surface of a surface base material and cooling and pressing with a cooling roll and a pressing roll. By using a roll having a concave portion in the roll rotation direction on a part of the surface as a pressure-bonding roll, a non-press-bonded part is formed on a part of the surface base material and the thermoplastic resin layer laminated as a pseudo-adhesion part. Pseudo adhesive sheet. 2. The pseudo-adhesive sheet according to claim 1, which is a pseudo-adhesive pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive layer and a release sheet are laminated on a thermoplastic resin layer. 3. The pseudo-adhesive sheet according to claim 1, wherein the pseudo-adhesive sheet has an uncompressed portion at one end or both ends. 4. The pseudo-adhesive sheet according to claim 1, wherein a cut line is formed in a surface base material of an unpressed portion. 5. The unbonded portion of the pseudo bonded portion has a width of 0.5 to 20.
The pseudo-adhesive sheet according to any one of claims 1 to 4, wherein the thickness is mm. 6. The recording sheet according to claim 1, wherein the surface substrate is a recording sheet.
The pseudo adhesive sheet according to any one of the above. 7. The pseudo adhesive sheet according to claim 6, wherein the recording sheet is a heat-sensitive recording sheet. 8. A surface substrate is guided to a nip composed of a pressure roll having a concave portion in the roll rotation direction on a part of the surface and a cooling roll such that the front side of the surface substrate is the pressure roll side.
A method for producing a pseudo-adhesive sheet in which a thermoplastic resin extruded from a T-die and a surface substrate are pressure-bonded and laminated by the nip. 9. The width of the concave portion of the pressure roll is 0.5 to 40 mm.
The method for producing a pseudo adhesive sheet according to claim 8, wherein 10. The method for producing a pseudo-adhesive sheet according to claim 8, wherein the depth of the concave portion of the pressure roll is 0.5 mm or more. 11. The method for producing a pseudo adhesive sheet according to claim 8, wherein the thermoplastic resin extruded from the T-die is polyethylene having a temperature of 250 to 320 ° C.