JPH0430612Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a peel-off sheet with support leads,
In particular, the present invention relates to improvements in the split structure provided on release paper.

[Conventional technology]

Generally, in labels etc. that are formed by forming an adhesive layer on the back side of a large upper sheet and attaching a release paper to this adhesive layer, the release paper has a spine split in order to make it easier to peel off the release paper. A method is adopted in which the release paper is divided into two parts.

By the way, conventionally, as a method for making a spine in a release paper, a method has been adopted in which a slit is made in the release paper while the release paper remains attached to the adhesive layer of the upper sheet.

[Problems to be solved by the invention] As described above, in the conventional spine forming method in which slits are made in the release paper attached to the adhesive layer of the upper sheet, it is extremely difficult to accurately make slits only in the release paper. However, there is a problem that the amount of cut is too small and a complete back split is not formed, or the amount of cut is too large and a cut is made on the back side of the top sheet. Even if there is a notch on the back side of the top sheet, there is no particular problem if the top sheet is made of relatively thick paper because the notch on the back side will not be exposed on the front side, but if the top sheet is transparent If it is made of plastic film, the notch on the back side will be exposed as a direct scratch on the front side.
It becomes a big problem.

Such problems also arise with sheets that are peelable from thermoplastic resins that are placed in a molten state and then solidified.

The present invention was developed in view of the current situation, and an object of the present invention is to provide a peel-off sheet with support leads that can reliably cut the back of only the peel-off sheet and that is extremely easy to split the back of.

[Means for solving problems]

In the present invention, a support sheet is laminated on the back side of a release paper through a molten thermoplastic resin layer so as to be separable from the resin layer, and a support sheet is laminated with a resin layer on the opposite side of the support sheet to the resin layer. The present invention is characterized in that a surface treatment layer made of the same type of thermoplastic resin as the layer is provided, and a cut for dividing the back is made in the peel-off sheet from the surface side thereof.

[Effect]

In the release sheet with supporting leads according to the present invention, a support sheet is releasably laminated on the back side of the release paper via a thermoplastic resin layer in a molten state, and the support sheet is layered on the release sheet on the front side thereof. I try to make a notch for splitting the back. Therefore, this release sheet with supporting leads is applied to the adhesive layer of an upper sheet such as a label paper having an adhesive layer on the back side, and after cutting the upper sheet and the release sheet, the support sheet is attached. By peeling and removing, it becomes possible to cut the back of the release paper without damaging the back surface of the top sheet.

In addition, the back-splitting incision made in the release paper in advance has enough margin for the total thickness of the resin layer and the support sheet, and even if the support sheet is slightly damaged, the support sheet can be removed later. Since there are no particular problems, the back splitting process is extremely easy.

Further, even if the release paper is cut in advance for the spine, the connection state is maintained by the support sheet, so there is no inconvenience associated with making the cut in advance.

〔Example〕

Hereinafter, the first embodiment of the present invention will be explained in Figures 1 to 6.
This will be explained with reference to the figures.

1 and 2 show an example of a peel-off sheet with support leads according to the present invention.
As shown in the figure, a release paper 2 whose upper surface is coated with silicone, and a support sheet 4 made of paper, for example, which is laminated on the lower surface of the release paper 2 with a thermoplastic resin layer 3 in a molten state interposed therebetween. A surface treatment layer 5 made of the same type of thermoplastic resin as the resin layer 3 is provided on the surface of the support sheet 4 facing the resin layer 3. The release paper 2 and the resin layer 3 are bonded together by pseudo-adhesion as will be described in detail later, and therefore the support sheet 4, the surface treatment layer 5, and the resin layer 3 can be peeled off from the release paper 2 as an integrated product. It's summery.

Further, as shown in FIGS. 1 and 2, the release paper 2 is provided with a large number of spine-splitting notches 7 from its surface side at intervals in the longitudinal direction that match the punching pattern 6 of the label or the like. Each of these cuts 7 is cut up to the position of the resin layer 3 as shown in FIGS. 1 and 2, so that even if there is some variation in the cut dimensions, a back split is reliably provided in the release paper 2. is taken into consideration.

By the way, pseudo-adhesion refers to a state in which the resin layer 3 is bonded to the release paper 2 due to "wetness" during melting, and the adhesive strength is, for example, when polyethylene is used as the resin layer 3. When measured as a 180 degree peel force on a sheet sample approximately 50 mm wide (peeling speed 500 mm/min, 23°C, 65°RH), it is approximately 10~
It is set to obtain a value of about 20g.

For the resin layer 3, any conventional thermoplastic resin can be used as long as it satisfies the relationship with the surface treatment layer 5 described later, but polyethylene or polypropylene is usually used from the viewpoint of cost and easy availability. .

On the other hand, the surface treatment layer 5 is made of a material that is compatible with and integrated with the resin layer 3 when it is melted and solidified, and the material selection is based on the material that forms the resin layer 3 and the surface treatment layer 5. Each thermoplastic resin
The question is whether or not they are substantially the same in terms of physical and chemical properties such as melting point, solidification temperature, fluidity, and specific gravity, but in practice, resin layers with a basic molecular structure such as polyethylene-polyethylene, polypropylene-polypropylene, etc. Selected from the same type of thermoplastic resin as No. 3.

For example, in the case of polyethylene, this surface treatment layer 5 is firmly integrated with the support sheet 4 by a lamination process performed at about 320° C., so that a much stronger adhesion force than the above-mentioned pseudo-adhesion can be obtained.

Next, the operation of this embodiment will be explained.

In manufacturing the release sheet 1 with support leads, first, a surface treatment layer 5 is formed on the surface of the support sheet 4 by laminating polyethylene at a processing temperature of, for example, 320°C.

Next, the back side of the release paper 2 and the surface treatment layer 5 are made to face each other, and polyethylene melted at about 280° C., for example, is continuously supplied between them by hot extrusion or the like, laminated under pressure, and then cooled. As a result, release paper 2
and the resin layer 3 are bonded together by pseudo-adhesion.

Next, cutouts 7 for cutting the spine are sequentially made in the release paper 2 at predetermined intervals in the longitudinal direction from the upper surface side of the release paper 2 to complete the release and removal sheet 1 with support leads.

Incidentally, the pitch interval of the notches 7 is not always fixed at a constant value, but is adjusted as appropriate according to the size and interval of the punching pattern of a label or the like, as shown in FIG. Therefore, when a label or the like, which will be described later, is manufactured using this peelable and removable sheet 1 with support leads, the back split will always be located at a certain position, for example, at the center of the label.

By the way, since the surface treatment layer 5 and the support sheet 4 are bonded by lamination treatment as described above,
The bond between the release paper 2 and the resin layer 3 and the bond between the surface treatment layer 5 and the resin layer 3 are significantly stronger than those in the case of close bonding due to "wetting" when the thermoplastic resin is melted. Provides bonding strength.

Furthermore, the bond between the surface treatment layer 5 and the resin layer 3 is a close bond due to "wetting" when the resin layer 3 melts as described above, but since both layers 3 and 5 are made of the same material, the resin layer Compatibility occurs between the two layers 3 and 5 during melting and solidification of the release paper 2 and the resin layer 3, and a much stronger bond is obtained compared to a simple pseudo attachment between the release paper 2 and the resin layer 3. Therefore, the support sheet 4, the surface treatment layer 5, and the resin layer 3 can always be peeled off from the release paper 2 as an integral part.

In this way, the peel-off sheet with support leads 1
Once completed, as shown in FIG. 3, it is placed on the lower side of a label paper 9 having an adhesive layer 8 on the back side, and a release paper 2 is attached to the adhesive layer 8.

Next, as shown in FIGS. 4 and 5, using only an upper blade (not shown) from the top side of the label paper 9, a label punching pattern 6 is inserted up to the position of the resin layer 3, and the label paper 9 and the release paper 2 are punched out. That is, the outer portion of each punching pattern 6 is removed. At this time, the part of the release paper 2 to be removed is only bonded to the resin layer 3 by pseudo-adhesion, so it can be easily removed.

Conventionally, when completely punching out the label paper 9 and the release paper 2, when only the upper blade is used, the depth of cut varies, making it impossible to completely punch out the label paper 9 and the release paper 2, or when the upper blade is cut out from the release paper. There was a risk that the teeth would protrude too far and collide with the receiving plate, causing damage to the tooth tips. For this reason, in the past, a lower blade was absolutely necessary, but it was not easy to determine the dimensions of the upper and lower blades, resulting in a significant increase in cost.

However, in the case of this embodiment, variations in the cutting depth during punching with the upper blade can be completely absorbed by the total thickness of the resin layer 3, surface treatment layer 5, and support sheet 4, and the punching is insufficient. There is no risk of the upper blade breaking through or colliding with the receiving plate.
Therefore, complete punching can be easily performed using only the upper blade.

FIG. 6 shows the state of the labels 10 after punching. Each label 10 is fixed onto the support sheet 4 by pseudo adhesion between the release paper 2 and the resin layer 3 on the lower surface, and each label 10 is A spine split 11 is provided in the center of the release paper 2. and each label 10
can be removed manually from the resin layer 3, or removed from the sixth layer.
As shown in the figure, the support sheet 4 can be easily peeled off from the resin layer 3 by bending and pulling it downward using rollers 12 or the like.

In addition, in the first embodiment, the notch 7 for splitting the back
Although a case has been described in which a large number of strips are provided at required intervals in the longitudinal direction of the release paper 2, for example, one may be cut through the widthwise central portion of the release paper 2 in the longitudinal direction.

Further, in the first embodiment, the surface treatment layer 5 is provided on the support sheet 4, and when the support sheet 4 is peeled off from the release paper 2, the resin layer 3 is always transferred to the support sheet 4 side. As explained above, by appropriately selecting the material of the support sheet 4 or applying an appropriate surface treatment such as corona discharge, it is possible to ensure that the resin layer 3 is placed on the support sheet 4 side even if the surface treatment layer 5 is omitted. In some cases, the surface treatment layer 5 can be omitted.

Furthermore, the resin layer 3 can be transferred to the release paper 2 by appropriately selecting the material of the support sheet 4 as described above, or by providing the surface treatment layer 5 on the release paper 2. It is also possible to do so. In this case, the only allowance for variations in the depth of cut 7 is the thickness of the support sheet 4, but if a somewhat thicker material is used as the support sheet 4, the variation can be sufficiently absorbed. Moreover, even if the support sheet 4 has some cuts due to the notches 7, there is no particular problem, so this method can be sufficiently put to practical use. Moreover, in this case, the effect that the waterproof performance of the back surface of the release paper 2 can be improved by the resin layer 3 can also be obtained.

FIG. 7 shows a second embodiment of the present invention, in which the release paper 2 in the first embodiment is replaced with the first
A peelable sheet 22 is used for a resin layer 23 similar to the resin layer 3 in the example.

That is, an upper sheet 24 made of, for example, plastic film is laminated on the upper surface side of the sheet 22 with a thermoplastic resin layer 23 in a molten state interposed therebetween, as shown by the chain line in FIG.
The resin layer 23 and the sheet 22 are closely bonded by pseudo-adhesion. In other respects, the configuration is exactly the same as that of the first embodiment.

With this configuration, it is possible to cut the back of the release sheet for pseudo-adhesion (i.e., the sheet 22), and the upper sheet 2
This is extremely effective when the punching pattern 4 is large.

Such an upper sheet 24 is used, for example, as a cosmetic pack sheet.

That is, as shown in FIG.
4 are laminated, and a predetermined pattern of punching is performed from the upper sheet 24 side to the resin layer 3. After that, the support sheet 4 is removed from the sheet 22 together with the resin layer 3 and the surface treatment layer 5. As a result, a laminate of the sheet 22, the resin layer 23, and the upper sheet 24 having a predetermined shape is obtained, for example, a laminate having a rectangular shape as a whole and having holes corresponding to the eyes, nose, and mouth. Therefore, a cosmetic pack liquid is applied to the surface of the upper sheet 24 of this laminate, and after the upper sheet 24 is attached to the face, the sheet 22 is removed. That is, conventionally, the cosmetic pack liquid was applied directly to the face, but instead it is applied to the upper sheet 24, and the upper sheet 24 is applied to the face.
In this case, it is customary to use an extremely thin sheet as the upper sheet 24 in order to make it easier to fit the shape of the face, so handling the upper sheet 24 alone is not easy, but with the sheet 22, it is easy to handle. be. Since this sheet 22 is only connected to the upper sheet 24 by pseudo-adhesion, it can be easily removed, and there is no fear that the upper sheet 24 attached to the face will be displaced when the sheet 22 is removed.

In the case of this embodiment, as detailed in the first embodiment, the resin layer 23 can be moved to the sheet 22 side, but in this case, the cut 7 will no longer function as a back split. It is necessary that the resin layer 23 always migrates to the upper sheet 24 side.

[Effect of idea]

As explained above, in the present invention, a support sheet is removably laminated on the back side of a release paper via a molten thermoplastic resin layer, and a support sheet is laminated on the release paper from the front side. Since the cut is made, it is possible to reliably cut the back of only the release sheet without damaging the upper sheet, such as a label, which is pasted on the release sheet via the adhesive layer or pseudo-adhesive layer. Moreover, the back splitting process is extremely easy, and there are no problems associated with adding the back splitting in advance.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a peel-off sheet with support leads showing a first embodiment of the present invention, FIG. 2 is a similar perspective view, and FIG. 3 is an adhesive layer on the peel-off sheet with support leads shown in FIG. 1. 4 is a sectional view showing a state in which the laminate shown in FIG. 3 has been subjected to punching, FIG. 5 is a similar perspective view, and FIG. FIG. 7 is a perspective view showing a state in which the strip has been peeled off from the state shown in FIG. 5, and FIG. 7 is a view corresponding to FIG. 3 showing a second embodiment of the present invention. 1... Release removal sheet with support lead, 2... Release paper, 3, 23... Resin layer, 4... Support sheet,
5...Surface treatment layer, 7...Notch, 8...Adhesive layer, 9...Label paper, 10...Label, 11...
...split back, 22...sheet, 24...top sheet.

Claims (1)

[Claims for Utility Model Registration] (1) A support sheet 4 is laminated on the back side of the release paper 2 via a thermoplastic resin layer 3 in a molten state so as to be separable from the resin layer 3. A surface treatment layer 5 made of the same type of thermoplastic resin as the resin layer 3 was provided on the surface of No. 4 facing the resin layer 3, and a back-splitting cut 7 was made in the peel-off sheet 2 from the surface side thereof. A peel-off sheet with support leads characterized by: (2) The release sheet according to claim 1, in which the resin layer 3 is made of polyethylene.