JP2006251425A - Shrink label for offset printing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shrink label capable of performing offset printing. <P>SOLUTION: The shrink label 10 for offset printing is constituted by mutually sticking a resin film 11 having heat-shrinkable performance and a lining paper 13 with adhesive 12 previously applied to the whole surface of one side so as to be peeled off from each other. For instance, high-quality paper or the like capable of compensating resistance against the heat shrink of the resin film without causing shrink deformation in the lining paper itself even at the time of receiving ultraviolet irradiation in offset printing is used as the lining paper 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a shrink label for offset printing used as a label for containers such as bottles and cans.

  In recent years, shrink labels are used as labels for PET bottles used as food containers and the like. This shrink label shrinks when heated above a predetermined temperature so that it can be attached to a container having a cubic curved surface, for example, a resin film as described in JP-A-2003-213103 Is used, and designs with patterns and colors are printed together with raw materials and contents.

  The design of the shrink label is to produce an image of the product, and an excellent product that can increase consumers' willingness to purchase is required. Therefore, in the process until the design is determined, many designs are created by the designer, and the design is repeatedly corrected. The design is narrowed down by the package department of the manufacturing company, which is the client, and the design presentation is given to the sales person in charge of the manufacturing company. Thereafter, when the design of the shrink label is determined, the shrink label is printed by a method such as gravure printing in order to mass-produce the product package.

  Printing a design on a shrink label is required not only during mass production of product packages, but also during sample production during the design selection process. However, gravure printing requires a relatively large cost and time to generate a plate and is not suitable for producing a small number of samples. For example, the above-described sample for presentation to a sales representative or the like does not need to be mass-produced by gravure printing or the like, and the quantity equivalent to offset printing is sufficient.

Here, a conventional printing method on a plastic film will be described.
When offset printing is performed on a film made of polypropylene, polyethylene terephthalate (PET), polystyrene, polyvinyl chloride (PVC), etc., the lower limit of the thickness is 200 μm. Therefore, when printing a film with a thickness of 200 μm or less, in order to compensate for the lack of thickness and prevent blocking, a sheet of glue is drawn on the print-reading part of each film, and the backing paper is used with this sheet of glue. Glued.
In offset printing, UV irradiation or powder spraying is performed to dry the ink. However, in food packaging applications, powder spraying is virtually impossible for hygienic reasons. Is generally done.
However, when the backing paper is bonded to the film for shrink labels as described above and offset printing is performed, there is a problem that the film heat shrinks due to ultraviolet irradiation, which is not practical. there were.
JP 2003-213103 A

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a shrink label capable of offset printing because it can prevent thermal shrinkage of the film due to ultraviolet irradiation.

  In order to solve the above-mentioned problems, in the present invention, a shrink label for offset printing is characterized in that a paper coated with an adhesive is adhered to the entire surface of a resin film having heat shrinkability so as to be peelable. Is provided.

Here, the resin film formed from polyester, polystyrene, polypropylene, polyethylene, vinyl chloride, or the like can be used.
Moreover, it is preferable to use a low-viscosity type adhesive having a relatively weak adhesive strength so that the adhesive does not remain on the resin film side when the paper is peeled from the resin film. Further, urethane-based and rubber-based solvent-type re-peeling adhesives can be used.

The shrink label for offset printing of the present invention is one in which a backing paper is adhered to one side of a resin film and offset printing is performed on the other side. In particular, the adhesive is applied to the resin film side. It is characterized by being applied to the entire surface of one side of the backing paper, and offset printing on a shrink label is possible. In other words, by attaching the backing paper to the entire surface of the resin film, the resistance to thermal shrinkage of the resin film is improved, and it is possible to prevent thermal shrinkage during UV irradiation, and suitable for offset printing with the backing paper. Thickness can be secured.
In the shrink label for offset printing of the present invention, the adhesive is applied to the entire surface of the backing paper side, but the adhesive is not applied to the resin film side. Therefore, after printing on the resin film, If the paper is peeled off, no adhesive remains on the resin film side and a beautiful finish is possible.

Hereinafter, although one embodiment of the present invention is described based on a drawing, the present invention is not limited to this.
As shown in the cross-sectional views of FIGS. 1A and 1B, the offset printing shrink label 10 includes a resin film 11 having a heat shrink performance and a backing paper 13 in which an adhesive 12 is preliminarily applied to one entire surface. Are attached so as to be peelable from each other.

  Here, as the resin film 11, for example, a polyester film having excellent uniaxial shrinkage and having a thickness of about 20 to 150 μm so that the horizontal direction contracts more than the vertical direction when heated to a predetermined temperature or higher. It is possible to use. As an example of such a polyester film, a heat shrink type polyester film (registered trade name: Space Clean) manufactured by Toyobo Co., Ltd. can be mentioned. This type of resin film 11 is thermally shrunk when the resin film 11 is irradiated with ultraviolet rays for offset printing.

The backing paper 13 is not particularly limited as long as the backing paper 13 can compensate for the heat shrinkage of the resin film without causing deformation such as shrinkage when subjected to ultraviolet irradiation of offset printing. Can be used.
As the backing paper 13, a high-quality paper having a planar dimension equal to or larger than that of the resin film 11 and having a thickness of 200 μm or more when combined with the resin film 11 is used. Thereby, the backing paper 13 is affixed on the whole surface of the resin film 11, and it can improve the yield strength of the resin film 11 with respect to heat shrinkage, and the thickness suitable for offset printing is ensured.
The backing paper 13 is not limited to high-quality paper, and paper such as coated paper or kraft paper can be used.

It is sectional drawing of the shrink label for offset printing of this invention.

Explanation of symbols

10 Shrink Label for Offset Printing 11 Resin Film 12 Adhesive 13 Backing Paper

Claims (1)

A shrink label for offset printing, wherein a paper coated with an adhesive is applied to the entire surface of a resin film having heat shrinkability so as to be peelable.

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