JPH0537942U - Adhesive tape - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an adhesive tape that does not cause adhesive residue or stains on an adherend even when it is subjected to low temperature heat history after fixation. [Structure] One side of a substrate is subjected to corona discharge treatment, and a print layer of a curable ink, a curable undercoat layer, and an adhesive layer are provided in this order on the treated surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a removable adhesive tape for temporary fixing of parts.

[0002]

[Prior Art]

 Conventionally, in the distribution stage of electric appliances such as refrigerators and washing machines, furniture, etc., in order to temporarily fix the parts to the main body, a non-curable undercoat treatment for printing is applied to one side of the base material. A releasable pressure-sensitive adhesive tape is used in which a print layer, a subbing layer, and a pressure-sensitive adhesive layer made of a curable ink are provided in this order on the treated surface.

[0003]

[Problems to be solved by the device]

 However, in the conventional pressure-sensitive adhesive tape, the non-curable undercoat layer has a strong adhesiveness with the ink, but the adhesiveness is weak because it does not have a functional group bond with the base film, and peeling occurs at this portion. It is easy to occur. Therefore, when a low-temperature heat history is applied after fixing, such as in cold regions, freezers, and refrigerators, the adhesive strength of the adhesive layer increases with time on the adherend. There is a problem that it may not be peeled from the interface with the body and may be peeled off at the interface between the printing layer and the undercoat layer to cause adhesive residue, or the print may be transferred to the adherend and stain the adherend. there were.

An object of the present invention is to solve the above conventional problems and to provide an adhesive tape that does not cause adhesive residue or stains on an adherend even when it is subjected to low temperature heat history after fixing. Suru

[0005]

[Means for Solving the Problems]

 The gist of the present invention is that a corona discharge treatment is applied to one surface of a substrate, and a print layer, a curable undercoat layer, and an adhesive layer are provided in this order on the treated surface by a curable ink. Is.

Examples of the base material used for the adhesive tape of the present invention include synthetic resin films such as biaxially oriented polyester and biaxially oriented polypropylene, and the former is particularly preferable because high treatment degree can be obtained by corona discharge treatment. .

The thickness of the base material is preferably 25 to 50 μm for the biaxially oriented polyester film and 40 to 60 μm for the biaxially oriented polypropylene film so that deformation and breakage do not occur during use.

The treatment degree of the corona discharge treatment may be 40 dyn / cm or more, but it is preferably 45 dyn / cm or more. The biaxially oriented polyester film is preferably 56 dyn / cm, and the biaxially oriented polypropylene film is preferably about 45 dyn / cm.

A release agent layer is provided on the back surface of the pressure-sensitive adhesive tape of the present invention, which comes into contact with the pressure-sensitive adhesive layer at the time of winding, in order to improve the developability when the roll wound around the core is developed. . As the release agent layer, a release agent such as a silicone-based polymer or a long chain alkyl group-containing polymer is applied.

As the printing ink used in the printing layer of the pressure-sensitive adhesive tape of the present invention, a curable type is used. The undercoating agent used in the undercoating layer of the pressure-sensitive adhesive tape of the present invention is a curable type that is compatible with printing ink.

The pressure-sensitive adhesive used in the pressure-sensitive adhesive layer of the pressure-sensitive adhesive tape of the present invention is not particularly limited, and any of natural rubber-based, synthetic rubber-based, and acrylic-based can be used. For this, a curable type is used.

[0012]

[Action]

 The pressure-sensitive adhesive tape of the present invention is subjected to corona discharge treatment on one side of the base material, and the printed layer, the curable undercoat layer and the pressure-sensitive adhesive layer are provided in this order on the treated surface. By reacting the corona discharge treated surface of the film, the functional group of the curable ink, and the curable ink and the curable undercoat layer, the bond strength between each layer is strong, and even in the case of low temperature history. The adhesive tape is peeled off at the interface between the adherend and the adhesive layer without causing delamination.

[0013]

【Example】

 Examples of the present invention will be specifically described below, but the present invention is not limited to the examples.

A release agent containing a long-chain alkyl group (trade name “Piroyl 81” is formed on one surface of a substrate 1 made of a transparent biaxially stretched polyester film (trade name “FE-2001 # 50” manufactured by Nimura Chemical Co., Ltd.) having a thickness of 50 μm. On the other hand, a peeling layer 2 was provided by coating a product manufactured by Yushisha Kogyo Co., Ltd., and the other surface was subjected to a corona discharge treatment of 56 dyn / cm. On the corona discharge treated surface 11, a printing layer 3 made of a curable printing ink (trade name “Lamic F-220” manufactured by Dainichiseika Co., Ltd.), an undercoat layer 4 made of a butyl rubber-based two-component curable undercoating agent, a natural coating A pressure-sensitive adhesive tape 5 having a thickness of 77 μm was obtained by providing a 25 μm-thick pressure-sensitive adhesive layer 5 made of a natural rubber-based pressure-sensitive adhesive in which 100 parts by weight of a tackifying resin was added to 100 parts by weight of rubber in this order.

With respect to the obtained adhesive tape, the spreading force, SP adhesive force and tack were measured based on JIS-Z-0237. The development force was 155 g / 15 mm width, the SP adhesive force was 437 g / 15 mm width, and the ball tack was 18/32 inch.

Next, this adhesive tape was adhered to a styrene resin plate and a melamine coated steel plate under conditions of 23 ° C. and 65% RH and left for 30 minutes, and then left at −30 ° C. for 120 minutes. After being left again for 30 minutes under the conditions of 23 ° C. and 65% RH, it was peeled off and the presence or absence of adhesive residue was confirmed. As a result, no adhesive residue was found in any of the results.

[0017]

EFFECTS OF THE INVENTION Since the adhesive tape of the present invention is constructed as described above, even when it is subjected to a low temperature heat history after being fixed, delamination does not occur when peeling and no adhesive residue occurs. Therefore, the adherend is not polluted, and it is not necessary to apply an undercoating agent for printing ink, which improves productivity.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of the adhesive tape of the present invention.

[Explanation of symbols]

 1 Substrate 3 Printing layer 4 Undercoat layer 5 Adhesive layer 11 Corona discharge treated surface

Claims (1)

[Scope of utility model registration request] 1. A corona discharge treatment is applied to one surface of a substrate,
A pressure-sensitive adhesive tape comprising a print layer of a curable ink, a curable undercoat layer, and an adhesive layer provided in this order on the treated surface.