JP2002127314A - Sticking sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sticking sheet easily allowing re-sticking when an initial sticking is mistaken and repeated stickings, and eliminating a residue of a pressure sensitive adhesive on a surface to be stuck. SOLUTION: A cross-linked silicone rubber layer is provided on at least one surface of a substrate sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a sticking sheet.

[0002]

2. Description of the Related Art In recent years, an adhesive sheet provided with an adhesive layer or a magnet layer on one side of a sheet has been used as an application for giving functions such as display, protection, and decoration to adherends such as signs, signs, and automobiles. It is used. However, in the case of an adhesive sheet, it is not easy to re-apply due to an improper application, and it is difficult to use repeatedly. In addition, in the case of a magnet sheet, although there is some conformability to the shape and the convenience is excellent, the surface to be adhered is limited to a magnetic material or the like. Has the disadvantage that the sheet becomes heavier as a result. Furthermore, it was difficult to re-attach the adhesive sheet to the conventional adhesive sheet or to repeatedly use it.

[0003]

DISCLOSURE OF THE INVENTION The present invention facilitates re-pasting and repeated pasting due to pasting mistakes, without leaving an adhesive on the surface to be adhered, and when pasting to the surface of an adhesive. Another object of the present invention is to provide a pasting sheet that can be re-pasted or used repeatedly.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a sticking sheet characterized in that a crosslinked silicone rubber layer is provided on at least one surface of a base sheet. Things.

[0005] By adopting this configuration, the adhesive force of the silicone rubber layer allows good adhesion to various substrates without providing a pressure-sensitive adhesive layer or a magnet layer, and at the same time, the peelability is good. It is possible to realize a pasting sheet that can be re-pasted or used repeatedly.

[0006] In the sticking sheet of the present invention, a magnet sheet can be used as a base sheet.
Thereby, since the sticking force of the silicone rubber is added to the magnetic attraction force of the magnet sheet, there is an effect that the magnet sheet can be made thinner and lighter.

Further, the adhesive sheet of the present invention may contain 1 to 5 parts of an adhesive per 100 parts of silicone rubber, if necessary. Thereby, the adhesiveness between the base material sheet and the silicone rubber layer can be improved.

Further, the adhesive sheet of the present invention can further ensure the adhesion by subjecting the surface of the base sheet on which the silicone rubber layer is formed to an easy adhesion treatment.

[0009] Further, the sticking sheet of the present invention can be improved in visibility and decorativeness by performing a printable process on the opposite surface of the silicone rubber layer.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a conventionally known base sheet used for forming a silicone rubber layer can be used.

Specifically, a base film of synthetic resins such as polyethylene terephthalate and polyurethane, metals such as aluminum, papers, cloths and laminates thereof, and a magnet layer provided on the base film Examples include a sheet and a sheet in which the base film itself is a magnet formed by extrusion molding.

The adhesive sheet of the present invention has a base material provided with a silicone rubber layer on one or both sides. Silicone rubber is not an adhesive, so no release paper is required.However, to prevent contamination of the silicone rubber surface, non-adhesive films such as glassine paper or polypropylene film or non-adhesive paper, plastic paper, It is preferable that the surface is protected by a release paper or a release film such as a paper or a film coated with a release agent such as a fluororesin.

It is desirable that the crosslinked silicone rubber layer be relatively soft after curing, because of its adhesiveness. The silicone resin and the crosslinking agent are mixed with a solvent, applied to a substrate, and the solvent is evaporated. In addition, it is preferable to use a type of silicone rubber which undergoes crosslinking at room temperature. The silicone rubber is generally preferably a two-part type crosslinked type, and is preferably a three-dimensional type silicone rubber which is crosslinked by mixing both parts upon use.

As the silicone rubber, a liquid type silicone resin having a dimethylpolysiloxane main chain and a degree of polymerization of 1,000 or less is used. A catalyst such as platinum is mixed with this base material. The hardness of the cured silicone rubber is adjusted by increasing or decreasing the amount of the crosslinking agent. Further, by preparing two or more types of silicone rubbers having different hardnesses and adjusting the mixing ratio of the two, a silicone rubber having an arbitrary hardness can be obtained. As the cross-linking agent, for example, a polysiloxane having active hydrogen such as methyl hydrogen polysiloxane is used. As a crosslinking catalyst, a platinum-based crosslinking agent such as an organoplatinum compound is generally used, and can be blended in a silicone rubber solution before crosslinking. Other money,
Organic noble metal compounds such as silver and palladium can also be used, and ordinary peroxide catalysts can also be used.

In the present invention, an adhesive can be blended into the silicone rubber solution to improve the adhesion between the base sheet and the silicone rubber layer. Such an adhesive is a hydrolyzable siloxane compound or an oligomer thereof. For example, alkoxysilane is preferable,
Further, a siloxane compound having an epoxy group, a methacryl group, a vinyl group or the like is also effective. The adhesive is mixed in an amount of 1 to 5 parts with respect to 100 parts of the silicone rubber. It is also effective to subject the surface of the substrate sheet on which the silicone rubber layer is to be formed to an easy-adhesion treatment, if necessary. For example, a material subjected to a corona surface treatment, a primer, or an intermediate coating can be used.

The base sheet used in the present invention can be subjected to a printable process on one side in advance. Examples of the printable processing include, for example, an ink receiving layer for inkjet, a transfer receiving layer for thermal transfer, a toner receiving layer for electrophotography,
Examples include, but are not limited to, thermosensitive coloring layers. It is also possible to form a color layer for obtaining a visual effect under the printable processing layer,
It is also possible to form an anchor layer as needed.
The silicone rubber layer is formed on the surface opposite to the printable processing surface, and becomes a sheet for application.

In applying the silicone rubber to the surface of the base sheet, the above-mentioned components are diluted with a solvent as necessary and used, and then dried (at room temperature.
(Heating at 00 to 150 ° C.) so that the thickness of the silicone rubber layer is 0.1 to 10 μm.

[0018]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto. In addition,
“Parts” in the text represents “parts by mass”.

Example 1 A 75 μm polyethylene terephthalate film was used as a substrate sheet. As silicone rubber, TS
E3032 (manufactured by GE Toshiba Silicone Co., Ltd., room temperature curable, two-pack silicone rubber) was used. 10 parts of 2 liquids are mixed with 100 parts of 1 liquid, and 3 parts of YC9362 (manufactured by GE Toshiba Silicone Co., Ltd., main component alkoxysilane) are added.
Parts and 25 parts of a diluting solvent. This solution was applied to the above substrate sheet, dried and cured at 120 ° C. for 30 minutes to obtain a film having a thickness of about 5 μm. The surface coated with the silicone rubber was covered with a release film composed of a polypropylene film having a thickness of about 20 μm to obtain a sticking sheet of the present invention.

The sheet was cut into B5 size, the release film was peeled off, the wet feeling and gloss of the silicone rubber surface were observed, and the sheet was vertically adhered to a smooth and clean iron plate and glass plate. ℃ / 50% RH and 25 ℃
Observation was carried out when left at / 50% RH for 3 days, and the results are shown in Table 1.

Example 2 Using TSE3033 (manufactured by GE Toshiba Silicone Co., Ltd.) as a two-part silicone rubber, 100 parts of one part was mixed with 100 parts of two parts, and dried and cured at 140 ° C. for three minutes. A bonding sheet was prepared in the same manner as in Example 1 except that the film thickness was about 3 μm, and the same observation as in Example 1 was performed. The results are also shown in Table 1.

Example 3 As a base sheet, a magnetic layer (dry film thickness: 25 μm) formed by applying and magnetizing a magnetic paint on a 75 μm polyethylene terephthalate film was used, and a silicone rubber layer was formed on the surface of the magnet layer. Other than forming
A sticking sheet was prepared in the same manner as in Example 1, and Example 1 was used.
The same observations were made as described in Table 1, and also shown in Table 1.

Example 4 Example 1 was repeated except that an extruded magnet sheet of 100 μm was used as a base sheet, and a polyvinyl butyral layer (0.8 μm, BL-1: manufactured by Sekisui Chemical) was formed as an easy adhesion treatment. Similarly, prepare a sheet for pasting,
The same observations as in Example 1 were made and are also shown in Table 1.

Example 5 A sticking sheet was prepared in the same manner as in Example 4 except that the extruded magnet sheet of 100 μm used in Example 4 was demagnetized as the base sheet. The same observations as in Example 1 were made and are also shown in Table 1.

Example 6 A 120 μm polyethylene terephthalate film was used as a substrate sheet, and both sides of the film were coated with a silicone rubber layer in the same manner as in Example 1 to obtain a sheet that could be attached to both sides. This sheet for sticking was cut into B5 size, stuck on a smooth and clean glass surface, and a sticker such as a sticker was stuck on the back surface. Could be repeatedly applied.

Example 7 A 75 μm polyethylene terephthalate film having an ink jet receiving layer formed on one side was used as a base sheet, and a silicone rubber layer was coated on the back surface in the same manner as in Example 1 to obtain an adhesive sheet. . This sheet was cut into B5 size and printed on a whiteboard after printing with a commercially available ink jet printer. Was.

Comparative Example 1 Two-part silicone resin TPR6705 (GE Toshiba Silicone Co., Ltd.) was used in place of the two-part silicone rubber, and 100 parts of one part was blended with 10 parts of two parts and dried and cured. The same observations as in Example 1 were performed except that the film thickness of was set to about 3 μm, and the results are also shown in Table 1.

Comparative Example 2 The same observation as in Example 1 was performed using the same extruded magnet sheet of 100 μm as the base sheet used in Example 4, and the results are shown in Table 1.

Comparative Example 3 The same demagnetized 100 μm as the base sheet used in Example 5.
The same observations as in Example 1 were performed using an extruded magnet sheet of m, and are also shown in Table 1.

Comparative Example 4 The following test was carried out using the base sheet used in Example 4 and the bonding sheets prepared in Examples 4 and 5, and the results are shown in Table 2.

Test method: Surface property measuring instrument HEIDON-1
4 (manufactured by Shinto Kagaku Co., Ltd.), the base sheet was fixed vertically to the bottom of the measuring machine, and the width was 35 mm × length 44 mm
× A metal plate (3.3 g) having a thickness of about 0.1 mm is attached to the base sheet, and the metal plate is pulled at a speed of 100 mm / min so that the base sheet surface and the metal plate surface are kept parallel. Is measured five times, and the average is determined.

[0032]

[Table 1]

In the table, the evaluation criteria of × are as follows. The sticking force く is stuck in the same state as the initial state after being left for 3 days. The sticking force x does not stick from the beginning. Wet feeling ○
Feels moderate adhesion when rubbing the film surface with a finger. For the WET feeling x, no adhesive force is felt when the film surface is rubbed with a finger. Glossy indicates that the surface of the attached sheet is glossy. Gloss × indicates that the gloss of the pasted sheet surface is rough.

[0034]

[Table 2]

[0035]

According to the sticking sheet of the present invention,
Since it has excellent adhesion to the adhered surface and can be freely re-attached, it can be applied to displays, decorations, protective sheets, etc. for various uses. Further, when the magnet sheet is used as the base sheet, the silicone rubber layer is formed so that it can be more strongly adhered to an adherend. The silicone rubber surface also has good peelability, and the adhesive sheet with silicone rubber layers formed on both sides of the substrate can be re-applied to an adhesive adhered surface, and can be adhered to the adhered surface. The silicone rubber surface on the opposite side can be repeatedly attached with an adhesive seal or the like.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a typical configuration example of a sticking sheet of the present invention.

FIG. 2 is a cross-sectional view of a typical configuration example of a sticking sheet of the present invention using a magnet sheet as a base material.

FIG. 3 is a cross-sectional view of a typical configuration example of the sticking sheet of the present invention provided with a printable processing layer.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base sheet 2 silicone rubber layer 3 printable treatment layer 4 extruded magnet sheet base 5 coated magnet layer 6 easy adhesion treatment layer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F100 AK42 AK52B AL05B AN02B AS00A AT00 AT00A BA02 CA16B CA16H EJ05B EJ64A GB07 GB31 GB71 HB31 JB12B JL01 JL03 JL14

Claims (5)

[Claims] 1. A bonding sheet, wherein a crosslinked silicone rubber layer is provided on at least one surface of a substrate sheet. 2. The sticking sheet according to claim 1, wherein the base sheet is a magnet sheet. 3. The adhesive sheet according to claim 1, wherein the crosslinked silicone rubber layer contains 1 to 5 parts of an adhesive based on 100 parts of the silicone rubber. 4. The bonding sheet according to claim 1, wherein the surface of the base sheet on which the crosslinked silicone rubber layer is formed is subjected to an easy adhesion treatment. 5. The sticking sheet according to claim 1, wherein the surface opposite to the silicone rubber layer is subjected to a printable treatment.