JPH09168583A - Adhesive sheet with deodorizing function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sticker, a wappen, a label, etc. With a deodorizing function together with original functions such as displaying or decorating, by equipping an adhesive agent layer on one side of a sheet made of a synthetic resin containing a deodorant or a sheet coated with a deodorant composition on the surface. SOLUTION: This adhesive sheet with a deodorizing function useful for a sticker, etc., is formed in a sheet after kneading a deodorant in a synthetic resin or coated with a composition containing a deodorant on a synthetic resin surface to endow a deodorizing function, and an adhesive layer is formed on one side of the sheet. As the deodorant, the following are named: a porous active substance to deodorize by physical adsorption, a redox substance or catalytic substance to deodorize an odor substance by a chemical reaction, i.e. An inorganic substance such as activated carbon, natural zeolite, a platinum based substance, etc. The deodorant can be a combination of a photocatalyst and an adsorptive deodorant, and thereby a deodorizing function with both rapid active performance and retaining performance can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive sheet having a deodorizing function, and more specifically, a sheet containing a deodorant in a synthetic resin or a composition containing a deodorant on the surface of a synthetic resin sheet. The present invention relates to a pressure-sensitive adhesive sheet having a deodorant function, which is obtained by providing an adhesive layer on one surface of a sheet coated with a product. The pressure-sensitive adhesive sheet of the present invention is useful for stickers, patches, labels and the like.

[0002]

2. Description of the Related Art Nowadays, stickers, patches, labels and the like based on synthetic resin sheets are widely used in society due to their light weight. However, most of these have a display as their main purpose, or have added decorative effects such as multicolor printing and patterning. On the other hand, today, interest in aroma and odor is increasing, and deodorants are widely used.

[0003]

DISCLOSURE OF THE INVENTION The present invention further provides a deodorant function to a conventional simple display or an adhesive sheet such as a sticker, a patch, a label, etc. in which a decorative effect is added, and a deodorant function,
It aims to meet the demands for fragrance and odor as well as the original display and decoration functions.

[0004]

In order to solve the above-mentioned problems, the present invention kneads a deodorant in a synthetic resin which is a base of stickers, patches, labels, etc., and then forms a sheet, or A composition containing a deodorant is coated on the surface of a synthetic resin sheet to impart a deodorant function to each, and an adhesive sheet for stickers, patches, labels, etc., provided with an adhesive layer on one side of these sheets. The content.

The deodorant used in the present invention includes a porous active substance that deodorizes by physical adsorption and an oxidizing / reducing substance / catalyst substance that deodorizes an odorous substance by a chemical reaction. Examples of the former are activated carbon, activated clay, acid clay, natural zeolite, synthetic zeolite (hydrophilic / hydrophobic), bentonite, sepiolite, silica, silica-
Examples of the latter include magnesia and the like, and examples of the latter include inorganic materials such as platinum-based, iron-manganese-based, titanium-based, silica-alumina-based, and organic-based natural enzymes and artificial enzymes.

However, the deodorant used in the present invention is preferably colorless or white. Further, the particle diameter of the porous active substance which is an adsorption type deodorant is preferably in the range of 0.1 to 10 μm. These may be used alone or in combination of two or more, and it is also possible to use a physical deodorant as an adsorption-type deodorant and a chemical deodorant as an oxidizing / reducing substance / catalyst substance in combination.
Among them, the combination of titanium oxide photocatalyst and hydrophobic zeolite is most suitable. By combining a physical deodorant and a chemical deodorant, the fast-acting deodorizing action of the former and the persistent deodorizing action of the latter work together to provide a deodorant function with both fast-acting and long-lasting properties. A pressure-sensitive adhesive sheet having is obtained.

The synthetic resin used in the present invention may be either a thermoplastic resin or a thermosetting resin, but when kneading, it is necessary to select a resin through which a malodorous substance requiring deodorization can permeate. For example, low density polyethylene, high density polyethylene, linear low density polyethylene, ethylene-methacrylic acid copolymer, ethylene-vinyl acetate copolymer, olefin resin such as polypropylene and its copolymer, polystyrene resin, ( (Meth) acrylic acid type resin, polyvinyl chloride type resin, polyvinyl acetate type resin, polyurethane type resin, silicone type resin, phenol type resin, urea resin, melamine resin, unsaturated polyester resin, epoxy resin and the like, and In the case of coating, other than the above, a polyester resin sheet, a polyamide resin sheet, a polyvinyl alcohol resin sheet or the like may be used. These may be used alone or in combination of two or more.

When the deodorant is kneaded into the synthetic resin, the resin composition containing the deodorant may be directly formed into a sheet by extrusion or the like, and the deodorant resin composition may be formed on a substrate such as a synthetic resin. The product may be extruded to form a pressure-sensitive adhesive layer on the back surface of the base material of the laminate, or the base material may be peeled off from the laminate to obtain a deodorant resin composition sheet, and the pressure-sensitive adhesive layer may be provided on one surface May be provided. The surface of the deodorant resin composition layer or the deodorant composition sheet can also be printed with pictures, letters, etc., or decorated with an uneven pattern.

The amount of the deodorant is preferably 0.5 to 30 parts by weight with respect to 100 parts by weight of the synthetic resin. If it is less than 0.5 part by weight, the deodorizing effect is not sufficient, and if it exceeds 30 parts by weight, extrusion processability, surface property, printability and the like are deteriorated. The thickness of the sheet made of the deodorant resin composition is not particularly limited, but usually about 30 to 200 mm is suitable. The synthetic resin as the base material may be determined in consideration of the releasability of the deodorant resin composition sheet from the synthetic resin.

On the other hand, when coating with a deodorant,
As the binder resin, a film-forming resin having a function of fixing and adhering a deodorant agent to the surface of the synthetic resin sheet and capable of transmitting an odor substance is used. For example, urethane resin, silicone resin, acrylic resin, vinyl acetate resin, carboxymethyl cellulose, polyvinylpyrrolidone, etc. may be mentioned. These may be used alone or in combination of two or more. As an example of the coating method, a water slurry of a deodorant is prepared, and an acrylic emulsion or the like is added to this to prepare a coating solution.
A suitable concentration of the deodorant is about 2 to 10% by weight. If the concentration is too low, the deodorizing effect is insufficient, and if it is too high, coating becomes difficult.

[0011]

The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto.

Example 1 As a base material, a biaxially stretched polyester sheet (Toyobo Ester E5100, 50 μm) without anchor coating was used.
m), and on top of this, polypropylene "Hipol L
A-221 "(manufactured by Mitsui Petrochemical Industry Co., Ltd.) 65% by weight, calcium carbonate“ Whiten SB (red) ”(manufactured by Shiraishi Calcium Co., Ltd.) 20% by weight, modified polyolefin resin“ Admer QE-050 ”(Mitsui Oil Co., Ltd. Chemical Industry Co., Ltd.) 10% by weight and 120 ° C. as an adsorption type deodorant
× Hydrophobic zeolite "Absent #
2000 "(manufactured by Union Showa Co., Ltd.) and 5% by weight, and then kneaded and extruded (KCK8, KCK8)
0 × 2-35VEX; outlet temperature 200 ° C.) was melt-kneaded and pelletized, and the resin composition was extrusion-laminated using a T-die extruder (screw diameter: 40 mm, T-die outlet temperature 300 ° C.) to obtain a resin composition. A laminate having a thickness of 30 μm was obtained. Then, after cooling with a cooling roll, the biaxially stretched polyester sheet was peeled and separated from the laminate to obtain a polypropylene-based white resin composition sheet. Using this sheet, a pressure-sensitive adhesive layer was provided on the back surface, joined with tack paper (release agent layer / polyethylene layer / paper), and subjected to a punching process to produce a label. Write the name etc. one by one on the obtained label and affix it on the surface of each locker in the locker room. Also, when three plain labels are affixed on the inner wall surface of each locker, three odors inside the locker room and inside the locker. Was significantly reduced.

Example 2 As a deodorant, a titanium oxide photocatalyst and an adsorbing deodorant were combined, and a silica coating was prepared as follows. 1.5 parts by weight of "Taipaque ST-01" (anatase type, average particle size: 7 mm; made by Ishihara Sangyo Co., Ltd.) as a titanium oxide photocatalyst, "Absent # 3000" (hydrophobic zeolite, average particle) as an adsorbing deodorant Diameter: 3.3 μm; treated by Union Showa Co., Ltd.) 1.5 parts by weight and 1.5 parts by weight of "Absent # 1000" as silica sol "Snowtex" (manufactured by Nissan Chemical Industries, Ltd.) 4.8 parts by weight (silica) Was added, and the mixture was reacted by stirring at 100 rpm for 1 hour in a pot mill. The reaction solution was dried by a spray dryer and then heat-treated at 550 ° C. for 1 hour to obtain a deodorant which was a mixture of a silica-coated titanium oxide photocatalyst and an adsorption deodorant. To 3.9 parts by weight of the obtained deodorant, 17.5 parts by weight of non-distilled water was added to form a slurry, and an acrylic emulsion "Cybinol EK-1005" (solid content: 39%, manufactured by Saiden Chemical Co., Ltd.) ) Was added to make a uniform emulsion.

This emulsion was coated on a biaxially stretched polyester sheet (TOYOBO ESTHER E5100, 50 μm).
9 g / m ² (wet base) coating and drying were performed to obtain a coated synthetic resin sheet having a deodorant function, containing a deodorant 1 g / m ² and an acrylic resin 9 g / m ² (each dry base). The deodorant used in this example is a continuous deodorant obtained by combining the fast-acting physical deodorant ability of an adsorption type deodorant with the chemical deodorizing ability of titanium oxide photocatalyst by light (especially ultraviolet ray) irradiation. It also has an odor ability. An adhesive layer was provided on the opposite side of the coated surface of the obtained sheet, and the sheet bonded to tack paper was 15 cm × 15.
It was cut into cm, the tack paper was removed, and two sheets were pasted on the back seat of the car. When the deodorizing effect was evaluated, the offensive odor such as cigarette odor in the car was erased, and It was confirmed that there was a persistent deodorizing effect when exposed to light.

Example 3 In Example 1, the adsorption type deodorant "Absentu # 200" was used.
0 "5% by weight was replaced by 15% by weight of the deodorant which was a mixture of the silica-coated titanium oxide photocatalyst and the adsorption deodorant of Example 2, and" Whiten SB ( A red polypropylene) resin composition sheet having a deodorizing function based on polypropylene was obtained in the same manner as in Example 1 except that 20 parts by weight of “Red)” was used and 70% by weight of “HYPOL LA-221” was set to 70% by weight. . A design and characters were printed on one side of the obtained sheet, and an adhesive sheet and tack paper were laminated on the back side in that order, and the frame portion of the sheet was punched out to prepare a sticker. When this sticker is adhered to the inside of the window glass of the bus, not only the display is clearly observed, but also the exhaust gas odor and sweat odor in the bus vehicle are significantly reduced, and the effect is sunlight and in-house It was confirmed by irradiation with a fluorescent lamp that it continued even after 3 months.

[0016]

As described above, according to the pressure-sensitive adhesive sheet of the present invention, a sticker, a patch, a label or the like having a deodorizing function as well as an original function such as display and decoration is provided, and while interest in odor is increasing. Therefore, it greatly contributes to the improvement of daily life, and its usefulness is extremely large.

Claims (2)

[Claims] 1. A pressure-sensitive adhesive sheet having a deodorant function, comprising a synthetic resin sheet containing a deodorant, or a synthetic resin sheet coated with a deodorant composition, and having a pressure-sensitive adhesive layer on one side thereof. . 2. The pressure-sensitive adhesive sheet having a deodorant function according to claim 1, wherein the deodorant comprises a combination of a photocatalyst and an adsorption type deodorant.