JP3128736B2 - Composite sheet having pseudo-adhesive surface - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite sheet having a pseudo-adhesive surface, that is, an adhesive surface which can be easily peeled off by hand and cannot be attached again once it has been peeled off.

[0002]

2. Description of the Related Art A composite sheet having a quasi-adhesive surface is often used for pasting it on a display described on an adherend surface to conceal the display. In this case, when the upper sheet is peeled off from the pseudo-adhesive surface of the composite sheet, a concealed display appears and can be read, and the peeled sheet is curled and rounded. However, since it is not attached again and is discarded as it is, there is no particular inconvenience if the concealing property is excellent.

Recently, proposals have been made to use the composite sheet having the pseudo-adhesive surface not only as a concealable sheet but also as a delivery slip or a slip. In such a product, the necessary information such as the delivery destination and the product name can be described from the front side, and the delivery destination delivered in accordance with the description obtains the receipt stamp on the sheet peeled off from the pseudo-adhesive surface and delivers it. Bring it back as a record slip. However, if these sheets are peeled off from the pseudo-adhesive surface, they will curl and curl, so they may be lost on the way, and it is very difficult to lose the curl and flatten them. It takes a lot of time and it is difficult to keep these together.

[0004] When the delivery destination is out of the office, the presence of the delivered luggage or the like is similarly determined by peeling off the pseudo adhesive surface.
The sheet is put into a mail box or the like as a delivery message form to notify the user, but when this sheet is peeled off, it is curled and rounded. People can overlook it, and it's hard to see what's written on that sheet.

[0005] The curl of such a peeling sheet is caused by
This can be prevented by increasing the thickness of the release sheet paper, but in that case, it becomes thicker than a postcard, rather bulky and inconvenient to handle, and costs increase. This makes it impractical for large quantities.

[0006] Further, when a polyethylene resin layer was directly provided on one surface of a thin paper sheet to form a pseudo-adhesion surface, a trial production was performed. When an adhesive layer for attaching to an adherend was formed on the entire surface of the polyethylene resin layer, When the thin paper was peeled off from the pseudo-adhesive surface, it was curled. However, when the adhesive layer was provided only at the corners, it was found that the corners were curled, but not curled in the portion without the adhesive layer.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a composite sheet having a quasi-adhesive surface which does not curl when peeled off while using thin paper as the release sheet. is there.

[0008]

According to the present invention, one surface of the thin paper is subjected to a light release treatment so as to obtain a reliable adhesiveness and a light release characteristic, and a polyethylene resin layer is formed on the treated surface. A pseudo-adhesive surface is formed between the treated surface of the tissue paper and the polyethylene resin layer. This tissue paper is always securely adhered to the polyethylene resin layer and can be easily peeled off with a light action when necessary. Is not curled and rounded.

Further, the present invention provides a thin paper having a polyethylene resin layer formed on one surface thereof, an adhesive layer provided on the polyethylene resin layer, and the adhesive layer having a surface formed in a crater shape. The thin paper is curled and curled when the thin paper is peeled off from the pseudo-adhesive surface, so that the thin paper is adhered to the polyethylene resin layer so that the adhesion to the polyethylene resin layer is partially and uneven. To prevent them from doing so.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Thin paper 1 may be coated paper, high quality paper, kraft paper, finely coated paper, thermal paper or other papers. 80 g / m ^2, preferably about better to about 10 to 50 g / m ^2.
Normally, it is better to use coated paper, but if high quality paper or kraft paper is used, it can be made more economical, and if imprinting is required, it is convenient to use lightly coated paper. Good.

One surface of the thin paper 1 is lightly subjected to a releasability treatment to provide a treated surface 2. For this release treatment, a non-silicone release agent having a low release effect is preferably used, and a wax resin, a varnish, a low-polarity resin, a printing ink, and the like are used. Tear) can be suppressed. The above-mentioned release treatment is preferably carried out by reducing the concentration of the release agent, and may be applied to the entire surface of the thin paper, or the applied zone and the non-applied zone may have a polka dot pattern, a checkered pattern, a striped pattern and other various types. They can coexist in a pattern, and the releasability can be adjusted by the ratio of the applied zones.

The release treatment layer varies depending on the type of the release agent, but is about 0.05 to 1 in terms of dry amount.
It may be used in an amount of about 0 g / m ² . This release treatment can be formed by gravure printing, roll coater, die coater or other techniques.

A polyethylene resin layer 3 is formed on the processing surface 2 of the thin paper 1, and a space between the polyethylene resin layer 3 and the pseudo-adhesion surface 4 is formed. This polyethylene resin layer corresponds to the treated surface 2 of the thin paper.
It is good to form on top by laminating technique,
Usually formed by extrusion coating lamination, but can also be formed by dry lamination or the like. The thickness of this polyethylene resin layer is about 10μ
~ 50μ, preferably about 10-20μ
It should be about.

The polyethylene resin layer may be made of a single polyethylene resin, a mixed resin of low-density polyethylene and high-density polyethylene, a mixed resin of polyethylene resin and ethylene-vinyl acetate copolymer (EVA), or another mixed resin. Can be used as appropriate.

The adhesive force of the pseudo adhesive surface 4 formed between the processing surface 2 of the thin paper 1 and the polyethylene resin layer 3 is determined by JI
It is preferably about 10 to 50 g / cm, particularly preferably about 15 to 30 g / cm, as measured by the 180-degree peeling method according to SZ0237.

The thus multi-layered product is usually provided with a pressure-sensitive adhesive layer 5 on the polyethylene resin layer, and the surface of the pressure-sensitive adhesive layer is formed on a release paper 7 having a release surface 6 for sticking to an adherend. To cover. Acrylic, rubber or the like can be used as appropriate for this adhesive.

2 and 3 are formed on a delivery slip 10 for luggage, and are provided on the back side of the lightly-coated paper tissue 1.
A white printing ink is applied by a gravure technique to form a release treatment layer 2, on which a laminate layer 3 of a polyethylene resin layer is provided with a thickness of 15 μm.

In this case, the above polyethylene resin laminate
After extruding the polyethylene resin, the release layer 2 of the thin paper 1 is extruded from the side of the polyethylene resin layer by rollers such as knurling and embossing.
It is more preferable that the part pressed strongly toward the side and the part pressed weakly are dispersed and mixed in a dispersed pattern. In this case, the strongly pressed portion is strongly bonded, and the weakly pressed portion is weakly bonded. As a whole, even if weakly bonded, it is strongly bonded in some places. Is formed on the entire surface of the polyethylene resin layer, the sheet peeled off from the pseudo-adhesion surface is less curled. It is convenient that the pressing operation is performed by a cooling roller in the laminating process.

An acrylic pressure-sensitive adhesive layer 5 is formed on the polyethylene resin layer 3. In the illustrated example, an acrylic pressure-sensitive adhesive layer 5 has a slightly larger release surface 6 on the pressure-sensitive adhesive layer formed on the entire surface. Covered with release paper 7.

When the delivery slip 10 is used, the sender of the luggage is informed of the "delivery destination", "client" and "article name" in the delivery slip 12 and the sticky slip 13 according to the display 11 printed on the surface of the thin paper. And have the delivery company fill in the "acceptance date". For those who always send a large amount of packages to a certain destination, if the delivery company prepares and delivers the required items in the "Destination" and "Requester" columns in advance, the sender will be more Easy to use.

The delivery company peels off the release paper 7 of the delivery slip 10 which has been filled in and affixes it to the place where the package can be easily seen by the adhesive layer 5 to receive the package. Then, delivery is performed according to the display of the slip.

At the delivery destination, the delivery company delivers the package to the delivery destination, picks up and pulls the thin paper 1 of the delivery slip 12, and peels off from the pseudo-adhesive surface 4 between the polyethylene resin layer 3 and the delivery slip 12 of the thin slip. The delivery stamp is received at the “receipt stamp”, the package is delivered, and the delivery is completed. At this time, the delivery slip is not easily peeled off from the pseudo-adhesive surface and does not curl. Therefore, it is easy to push the receipt stamp, and it is convenient to overlap or spell the received delivery slip. .

If the delivery destination is not at home, the affixed slip 13 below the delivery slip 10 is peeled off from the pseudo-adhesion surface 4 and returned in a mail box or the like. When the person who was out of the office returns and looks at the tag 13 in the mail box or the like, it can be seen that the package has been delivered, but the peeled tag 13 is called out as described above. Because it is not done, it does not happen that the person at the delivery destination hides in the corner of the mailbox or the like and does not see it, and the contents described are easy to read. This sticker 13
If there is a contact from the absent destination to the delivery company, the delivery is performed again, the delivery slip 12 is stripped off in the same manner as above, and the delivery is completed as described above with the receipt stamp.

The delivery of luggage has been described above, but can be widely applied to the delivery of registered mail and other various uses in the same manner as described above. Also, if the composite sheet is adhered with an adhesive layer so as to cover the display on the adhered surface, the display on the adhered surface can be concealed, and the tissue paper can be peeled off from the pseudo-adhesive surface. If so, the hidden display appears and can be viewed.

Further, a plurality of multi-layer sheets composed of the thin paper 1, the release treated surface 2 (pseudo-adhesion surface), the polyethylene resin layer 3, and the pressure-sensitive adhesive layer 5 are stacked and laminated so as to be bonded by the pressure-sensitive adhesive layer 5. For example, since the display shown on the surface of each thin paper 1 can be sequentially peeled off from the pseudo-adhesive surface from above, the display can be applied to various displays.

FIG. 4 shows an example in which a polyethylene resin layer 3 is formed directly on one surface of a thin paper 1 and a pseudo-adhesion surface 4 is formed therebetween.
An adhesive layer 5 is formed on the polyethylene resin layer 3. The pressure-sensitive adhesive layer 5 has a non-uniform crater shape 9 on the surface bonded to the polyethylene resin layer 3.
Are partially and non-uniformly bonded.

When the thin paper 1 is peeled off from the pseudo-adhesion surface 4, although the reason is not well understood by the bonding of the polyethylene resin layer 3 and the pressure-sensitive adhesive layer 5, the thin paper 1 is curled and rounded. Without anything
It can be peeled into a clean sheet.

Such a pressure-sensitive adhesive layer 5 can be formed as follows. For example, in a solvent-based acrylic pressure-sensitive adhesive, generally, an organic solvent 5
Although 0 parts by weight are mixed, 50 parts by weight of water and a small amount of polyacrylic acid are added thereto and stirred to form a state in which the added water is temporarily dispersed. When such an adhesive is applied on the release surface 6 of the release paper 7 to a required thickness and dried, the organic solvent first volatilizes, and the dispersed water vaporizes and expands,
The adhesive layer breaks, bursts and escapes. As a result, the surface of the pressure-sensitive adhesive layer 5 is formed in a crater shape with unevenness. Also, by applying a solvent-based acrylic pressure-sensitive adhesive to a required thickness and then spraying water thereon, the surface of the pressure-sensitive adhesive layer can be similarly formed in a crater shape.

If the crater-like surface of the pressure-sensitive adhesive layer is bonded to the polyethylene resin layer 3 and transferred, the polyethylene resin layer 3 and the pressure-sensitive adhesive layer 5 are partially non-uniformly bonded. You can create a tailored condition. In the case of a water-based pressure-sensitive adhesive layer, the same state can be formed by dispersing an organic solvent in the opposite manner to the above.

The prevention of the curl due to the cratering of the pressure-sensitive adhesive layer can be further improved by variously combining the above-mentioned one with a polyethylene resin layer formed on one side of the thin paper 1 after the release treatment. In addition, it is possible to obtain a thin paper that does not easily curl.

FIG. 5 shows a thin paper 1 similar to the above.
Is subjected to a release treatment, a polyethylene resin layer 3 is provided on the treated surface 2 to form a pseudo-adhesive surface 4, an adhesive layer 5 is provided thereon, and a display unit 8 is provided thereon in advance. It is. Then, a release paper 7 having a release surface 6 covers it.

This is prepared by forming a pseudo-adhesive surface 4 by providing a release-treated surface 2 on one surface of a thin paper 1 and providing a polyethylene resin layer 3 thereon. A pressure-sensitive adhesive layer 5 is provided on 6 and the pressure-sensitive adhesive layer 5 is adhered to the polyethylene resin layer 3 to be integrated. After that, the release paper 7 is peeled off again and the display is appropriately displayed on the release surface 6 by printing or the like, and the display section 8 is put back on the pressure-sensitive adhesive layer 5. Since it is transferred to the fifth side, it can be easily formed.

This can be used as a delivery slip, a slip, or the like in the same manner as described above. A necessary article is displayed on the surface of the thin paper 1, and the release paper 7 is peeled off and attached to an adherend. To use. At this time, since the display section 8 has been transferred to the adhesive layer 5 side, the display section 8 is attached to the adherend together with the display section 8.

According to the above, the thin paper 1 is put on its pseudo-adhesive surface 4.
When peeled off, the display on the display unit 8 can be seen through. Therefore, in the case of the above example, if the display section 8 displays advertisements, notices, business guidance, and the like of the delivery company, it can be used more effectively. Even when the surface of the pressure-sensitive adhesive layer shown in FIG. 4 is made into a crater shape, the display portion can be provided in the same manner.

[0035]

As described above, according to the present invention, even when a thin tissue paper is used, the thin tissue paper can be smoothly peeled off from the pseudo adhesive surface without curling, and the storage of the peeled thin paper can be performed. It is easy and the whole can be formed thin, so that it can be manufactured more economically without cracking. Further, the basic configuration of the present invention can be developed into various modified examples, and its application field is wide.

[Brief description of the drawings]

FIG. 1 is a partially omitted sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view showing another embodiment of the present invention.

FIG. 3 is an enlarged sectional view of FIG. 2;

FIG. 4 is a partially omitted sectional view of still another embodiment of the present invention.

FIG. 5 is a partially omitted sectional view of another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thin paper 2 Releasable surface 3 Polyethylene resin layer 4 Pseudo-adhesion surface 5 Adhesive layer 6 Release surface of release paper 7 Release paper 8 Display part 9 Crater-like part on the surface of adhesive layer

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁷ Identification code FI B42D 11/00 B42D 11/00 E

Claims (7)

(57) [Claims] 1. A thin high-quality paper or other displayable thin paper is lightly subjected to a release treatment, a polyethylene resin layer is formed on the release-treated surface, and an adhesive layer is provided on the polyethylene resin layer. A composite sheet having a pseudo-adhesion surface between the release-treated surface of the thin paper and the polyethylene resin layer. 2. The peel adhesion of the pseudo-adhesion surface between the release-treated surface of the thin paper and the polyethylene resin layer is 10 to 50.
The composite sheet having a pseudo-adhesive surface according to claim 1, wherein the composite sheet has a g / cm (based on JIS Z 0237). 3. The composite sheet having a pseudo-adhesive surface according to claim 1, wherein said thin paper is paper of 10 to 80 g / m ^2.
G. 4. The composite having a pseudo-adhesive surface according to claim 1, wherein the stripping-treated surface of the thin paper has a zone where a release agent is applied and a zone where no release agent is applied. Sheet. 5. One surface of a thin high-quality paper or other displayable thin paper is lightly subjected to a releasability treatment, and a polyethylene resin laminate layer is formed on the release treatment surface. The adhesive force is changed into a dispersed pattern, a pressure-sensitive adhesive layer is provided on the polyethylene resin laminate layer, and a composite sheet having a pseudo-adhesion surface between the release-treated surface of the tissue paper and the polyethylene resin laminate layer is provided. -G. 6. A thin paper having a polyethylene resin layer formed on one surface of thin paper or other displayable thin paper, and an adhesive layer provided on the polyethylene resin layer, the adhesive layer having a surface formed in a crater shape. A composite sheet having a pseudo-adhesion surface having a pseudo-adhesion surface between the thin paper and the polyethylene resin layer, the surfaces being bonded to the polyethylene resin layer on the surface. 7. The composite sheet having a quasi-adhesive surface according to claim 1, wherein a display portion is further provided on the surface of the pressure-sensitive adhesive layer opposite to the polyethylene resin layer.