JPS6313543B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an adhesive label.

Generally, adhesive labels are formed by pasting a sheet-like label base material such as high-quality paper coated with a pressure-sensitive adhesive on the back side to a release sheet whose back side has been subjected to a release process such as silicone processing. Labels are manufactured by printing appropriate labels on the surface of high-quality paper and punching them into a predetermined label shape.

Therefore, adhesive labels manufactured in this way have adhesive applied all over the back of the label, and depending on the purpose of the label, they cannot be used for products where it would be a problem for the adhesive to adhere to the entire surface. For example, if there is a necessary printed part on the surface of the adherend to be pasted, and an adhesive label is pasted from above, the printed surface may be peeled off at the same time when the label is peeled off, or some of the adhesive may peel off. This caused the problem that the particles remained.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing an adhesive label in which an adhesive layer is provided only in the areas necessary for label attachment, and a non-adhesive area to which no adhesive adheres is formed on the back side of the label. .

Hereinafter, the method of the present invention will be explained with reference to drawings of embodiments.

Reference numeral 1 denotes a base material formed by pasting release papers 3 and 4 having different peel strengths from both upper and lower surfaces through a pressure-sensitive adhesive layer 2, and the adhesive layer 2 of the base material 1
The surfaces of the release papers 3 and 4 that are in contact with the release papers 3 and 4 are each subjected to a release treatment such as silicon processing. It is formed by a release paper 3 having a strong peel strength and a release paper 4 having a weak peel strength (see FIG. 2).

The base material 1 formed in this configuration is unwound from the supply roll 5 in FIG. The release paper 4, which has a weak peel strength, is punched out into an arbitrary shape 7 at a depth that touches the surface of the release paper 4, and the release paper 4, which has a low peel strength, is peeled off with a winding roll 8 and then wound up, and the punched portion 7a is used as the release paper. 4 and peeled off to expose the adhesive surface 2' of the adhesive layer 2.

Next, as shown in FIG. 4, the exposed adhesive surface 2'
On top, the label base paper 9 is unwound from the label base paper supply roll 10, passed between pressure rolls 11 and 12 to be laminated and polymerized with the adhesive surface 2', and if necessary goes through a printing process 13, and then is die cut 14 into a desired label shape. is,
A label 18 having a non-adhesive portion 2'' at the center of the back surface and an adhesive layer 2 around the periphery is formed.The label waste 15 is then wound up by a take-up roll 16, and the label 18 is wrapped around a release paper 3. The labels are formed in a constant arrangement on the top and wound onto a take-up roll 19. Note that the printing process on the label base paper 9 can be omitted by using a pre-printed label base paper.

In the thus formed adhesive label 18, the adhesive layer 2 on the back side is punched out into a square shape in the illustrated embodiment, a non-adhesive portion 2'' is formed in the center, and the adhesive layer 2 is formed around the periphery of the label 18. It is formed into a frame shape.

That is, in the manufacturing process, the 3 sides of the release paper with strong peel strength are punched out, and the release paper 4 with low peel strength is peeled off along with the punched part 7a without being punched out, and the exposed adhesive surface 2' is In this case, the die-cut non-adhesive part 7b remains, and the label base paper 9 is laminated and polymerized to cover this non-adhesive part 7b. In the label die-cutting process, a small amount of necessary material is added around this non-adhesive part. The mold is cut leaving the adhesive layer 2 behind.

Also, when stacking the label base paper 9, the label base paper 9
and the adhesive layer 2 are bonded together, and the adhesive layer 2
Since it is coated on a release paper 3 that has been subjected to a release treatment, the adhesive layer 2 is transferred and adhered to the label base paper 9 side, and the label 18 cut into a predetermined label shape is It is formed into an adhesive label having a non-adhesive part 2'' at the center of the back surface and an adhesive layer 2 around the periphery.

In the illustrated embodiment, the non-adhesive portion 2'' of the label 18 has a square shape, but by changing the cutting blade during the first stage of punching, the non-adhesive portion 2'' can have any shape such as circular or triangular. can be formed.

As described above, in the method of the present invention, of a base material to which release papers with different peel strengths are attached from both upper and lower surfaces through a pressure-sensitive adhesive layer, the release paper surface with a stronger peel strength has a higher peel strength than the other one. After punching to a depth that touches the surface of a weak (light) release paper, the release paper with a weak peel strength is peeled off, and at the same time, the punched part is also peeled off and removed together with the release paper to remove the punched part that does not have an adhesive layer. The label base paper is laminated and polymerized on the adhesive surface to expose the adhesive surface, the adhesive layer is transferred to the label base paper side, and the label is die-cut to form an adhesive label. The label has a frame-shaped adhesive layer only around the back of the label and a non-adhesive part in the center, so the adhesive does not unnecessarily adhere to the surface of the adherend and damage the necessary printing surface. Alternatively, if the label base paper is made of a transparent film, the necessary printed portions on the surface of the adhered powder can be seen through, and new uses for adhesive labels can be expected.

[Brief explanation of the drawing]

The drawings show an embodiment of the method of the present invention.
The figure is a process diagram showing a simplified manufacturing process for adhesive labels, Figure 2 is a cross-sectional view of the base material, Figure 3 is a cross-sectional view showing how the base material is peeled off, and Figure 4 is a sloped view of the label base paper in its attached state. FIG. 5 is a perspective view of a label manufactured by the method of the present invention. 1...Base material, 2...Adhesive layer, 2'...Adhesive surface,
2''...Non-adhesive portion, 3...Release paper with strong peel strength, 4...Release paper with weak peel strength, 7...Punching, 7a...Punched portion, 9...Label base paper, 14... Label die cut, 18...adhesive label.

Claims (1)

[Claims] 1 Form a base material by pasting release paper with different peel strengths from both the upper and lower surfaces via a pressure-sensitive adhesive layer, and the release paper surface having a weaker peel strength than the release paper surface having a higher peel strength of the base material. A cutting blade is used to punch out an arbitrary shape at a depth that touches the adhesive surface, the release paper with low peeling strength is peeled off, the punched part is peeled off together with the release paper to expose the adhesive surface, and the label base paper is placed on the adhesive surface. A method for producing an adhesive label, which comprises laminating and polymerizing the adhesive layer, transferring the adhesive layer to the label base paper side, and cutting out the label.