JPH0738152U - Adhesive sheet - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an adhesive sheet that can maintain its aesthetic appearance for a long time even when it is installed outdoors. [Structure] A transparent synthetic resin film 2 is laminated on one side of a colored synthetic resin film 1 and an adhesive layer 4 is laminated on the other side thereof, and the peel strength between the colored synthetic resin film 1 and the transparent synthetic resin film 2 is high. Is 100 to 400 g / mm width.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an adhesive sheet used for outdoor decoration and display.

[0002]

[Prior art]

 A decorative sheet capable of expressing an arbitrary color by using a general-purpose resin such as polyvinyl chloride and appropriately incorporating a pigment or the like in the resin component is disclosed in, for example, JP-A-63-54483. As shown, it is known.

Further, the above decorative sheet is used as a base material, and a release paper is laminated on the base material via an adhesive layer, which is used as a decorative adhesive sheet. Adhesive sheets can be cut into desired designs with a computer-controlled cutting machine and have excellent workability, so instead of the conventional painting display method, it has become popular as a coating material to be applied year by year. ing.

[0004]

[Problems to be solved by the device]

 However, such a pressure-sensitive adhesive sheet for decoration has a problem that when it is used outdoors for a long period of time, dirt adheres to the surface due to wind and rain, exhaust gas, etc., which impairs the aesthetics and makes it difficult to remove the dirt. .

An object of the present invention is to solve the above conventional problems and to provide an adhesive sheet that can maintain its aesthetic appearance for a long period of time even when it is installed outdoors.

[0006]

[Means for Solving the Problems]

 The adhesive sheet of the present invention has a transparent synthetic resin film laminated on one side of a colored synthetic resin film and an adhesive layer laminated on the other side thereof, and has a peeling strength between the colored synthetic resin film and the transparent synthetic resin film. Is 100-400g / 25mm width.

As the colored synthetic resin film used for the pressure-sensitive adhesive sheet of the present invention, a soft polyvinyl chloride film having good weather resistance is preferably used. The thickness is preferably 10 to 100 μm. If it is less than 10 μm, the strength is insufficient and it is easily damaged during construction, and if it exceeds 100 μm, the workability is deteriorated.

The method for producing the soft polyvinyl chloride film is not particularly limited, and examples thereof include a calendar method and a casting method.

As the transparent synthetic resin film laminated on one surface of the colored synthetic resin film, a film of polyethylene terephthalate, polytetrafluoroethylene or the like is preferably used. The thickness is preferably 50 μm or less, more preferably 30 μm or less. This is because if it exceeds 50 μm, the cutting workability with a cutting machine deteriorates.

The colored synthetic resin film and the transparent synthetic resin film are laminated with a peel strength of 100 to 400 g / 25 mm width. If the peel strength is less than 100 g / 25 mm width, the adhesive strength may be insufficient and it may peel during use. If it exceeds 400 g / 25 mm width, it will be difficult to peel only the transparent synthetic resin film. Because it will be.

The peel strength referred to in the present invention is defined as the strength obtained by a T-type peel test at a peel rate of 200 mm / min.

The pressure-sensitive adhesive forming the pressure-sensitive adhesive layer to be laminated on the other surface of the colored synthetic resin film is not particularly limited, and a conventionally known pressure-sensitive adhesive is used, and examples thereof include an acrylic pressure-sensitive adhesive.

The pressure-sensitive adhesive layer needs to have a pressure-sensitive adhesive strength such that it cannot be peeled off after being attached to an adherend, and its thickness is preferably about 20 to 40 μm after drying.

[0014]

[Action]

 The present invention has a transparent synthetic resin film laminated on one side of a colored synthetic resin film and an adhesive layer laminated on the other side, and the peel strength between the colored synthetic resin film and the transparent synthetic resin film is 100 to 100%. Since the width is 400 g / 25 mm, if dirt adheres to the surface, only the transparent synthetic resin film on the surface layer can be peeled off to restore the aesthetic appearance.

[0015]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a first embodiment of the adhesive sheet of the present invention.

Example 1 A resin composition comprising 100 parts by weight of polyvinyl chloride, 35 parts by weight of a polyester plasticizer, 11 parts by weight of a metal stabilizer and 35 parts by weight of a pigment was colored by a calendar method to a thickness of 100 μm. A soft polyvinyl chloride film 1 was prepared.

On one surface of the obtained colored flexible polyvinyl chloride film 1, a 25 μm-thick polyethylene terephthalate film (manufactured by Dia foil Co., Ltd.) 2 was laminated by dry lamination with a peel strength of 200 g / 25 mm width to form a base material 3. did.

Next, an acrylic pressure-sensitive adhesive is applied to the side surface of the colored flexible polyvinyl chloride film 1 of the substrate 3 so that the thickness after drying becomes 30 μm to form the pressure-sensitive adhesive layer 4, and A release paper 5 was laminated on top to obtain an adhesive sheet.

Comparative Example 1 An adhesive sheet was obtained in the same manner as in Example 1 except that the polyethylene terephthalate film was not laminated on one surface of the colored soft polyvinyl chloride film.

Example 2 A colored flexible polyvinyl chloride film having a thickness of 50 μm was prepared from the same resin composition as in Example 1 by a casting method, and one side of the obtained colored flexible polyvinyl chloride film was An adhesive sheet was obtained in the same manner as in Example 1 except that a polytetrafluoroethylene film having a thickness of 20 μm (manufactured by DuPont) was laminated.

Comparative Example 2 A pressure-sensitive adhesive sheet was obtained in the same manner as in Example 2, except that the polytetrafluoroethylene film was not laminated on one surface of the colored soft polyvinyl chloride film.

Using the pressure-sensitive adhesive sheets of Examples 1 and 2 and Comparative Examples 1 and 2 obtained as described above, a test piece of 300 × 300 (mm) was prepared, which was actually installed outdoors, The state of adhesion of surface stains was visually observed after 3 months, 1 year, and 3 years. The evaluation was carried out on a scale of 5, and 5 was set to indicate that no stain was attached.

The results are shown in Table 1.

[0024]

[Table 1]

It can be seen that although dirt adheres to the surface over time, it can be restored to a beautiful surface by removing the surface layer.

Next, for each of the examples only, an adhesive tape having an SP adhesive strength of 800 g / 25 mm width was attached to the surface of each of the 10 test pieces that were actually constructed outdoors and peeled off to remove the surface layer. The surface removal rate was calculated based on the number of produced sheets, and for those that could not be removed, the same test was performed again to calculate the surface removal rate.

The results are shown in Table 2.

[0028]

[Table 2]

It is found that the peeling of the surface layer gradually becomes difficult with the passage of time, but it can withstand practical use even after 3 years have passed.

[0030]

[Effect of device]

 Since the present invention is configured as described above, when dirt adheres to the surface of the pressure-sensitive adhesive sheet, only the transparent synthetic resin film on the surface layer is removed to maintain its aesthetic appearance for a long time. You can

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the pressure-sensitive adhesive sheet of the present invention.

[Explanation of symbols]

 1 Colored synthetic resin film 2 Transparent synthetic resin film 4 Adhesive layer

Claims (1)

[Scope of utility model registration request] 1. A transparent synthetic resin film is laminated on one side of a colored synthetic resin film, and an adhesive layer is laminated on the other side, and the peel strength between the colored synthetic resin film and the transparent synthetic resin film is 100 to 100. 400g / 25mm width adhesive sheet.