JP2006233133A - Plastic material having photocatalytic action and light storage action, its plate material and sheet material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a plastic material that provides photocatalytic actions such as antimicrobial action, deodorizing action, stain resistant action, water purification action, air purification, etc., by a natural light emitting action and is expected to have various uses its plate material and sheet material. <P>SOLUTION: The plastic material has a structure in which a plastic raw material 1 is mixed with a luminous agent 2 emitting a fixed frequency to form a plate shape or a sheet shape and the surface of the plate-like or the sheetlike material is provided through a binder 4 with a photocatalyst 3 which reacts to the fixed frequency emitted from the luminous agent 2 and is excited. The surface of the plastic raw material 1 may be provided with the photocatalyst 3 and hydroxyapatite 5, luminous plastic pellets are used as the luminous agent 2, the amount of the luminous plastic pellets is 1 part-20 parts based on 100 parts of the plastic raw material and the plate material and the sheet material are obtained from the plastic material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a plastic material having a photocatalytic action such as antibacterial, deodorizing, and antifouling, and a phosphorescent action that spontaneously emits light, and a plate material and sheet material thereof.

  Conventionally, the liquid antibacterial container body proposed by the inventor in Utility Model Registration No. 3103801 has a photocatalytic action and a luminous action. This is because the quality of liquids such as drinking water, chemicals, and cosmetics stored in the container can be preserved for as long as possible, and even if the container is stored in a dark place, photocatalysis is performed, and in the dark place. It was possible to confirm the location of the container. In addition, the structure of the present invention includes a container for containing a liquid, a base material provided in the container and in contact with the liquid, a photocatalyst composition layer provided on the base material, and a base material or a photocatalyst composition layer. It had a phosphorescent agent.

  However, the utility model registration No. 3103801 is provided with a photocatalyst composition layer and a phosphorescent agent mixed on the surface of the base material provided inside the container, as shown in the enlarged view of the publication, and inside the container. Since the liquid is stored, the luminous efficiency of the light obtained from the room lighting with the luminous agent is extremely small.

In general, when the photocatalyst is applied to an organic adherend, the adherend itself is decomposed to cause deterioration, so that the photocatalyst is not applied to the organic adherend in the outdoors. The current situation is that photocatalyst is always applied on inorganic materials such as glass, cement, stone, and metal. In addition, the phosphorescent agent is used as a warning means or a decoration because the oscillation peak spectrum changes and the color of the color changes by changing the mixing ratio of the composition. On the other hand, photocatalysts are often used under sunlight, but they can be used for indoor lighting and can be expected to have sterilization and antifouling effects, and the progress of deterioration of the adherend itself is much advanced. There are various proposals that do not exist. In this case, for example, when a photocatalyst is kneaded and blended into a plastic molded product, the amount of particles exposed on the molded product surface is small when added in a small amount. If it is added in such a large amount that the antibacterial effect appears, the molded product itself is oxidatively decomposed, which shortens the life of the molded product and impairs the mechanical strength and various characteristics. In addition, since the photocatalyst is expensive, the cost of the molded product is high.
Utility Model Registration No. 3103801

  An object of the present invention is to provide a plastic material obtained by a phosphorescent action that spontaneously emits a photocatalytic action such as antibacterial, deodorizing, antifouling, water purification, and air purification.

  Another object of the present invention is to provide a plate material and a sheet material of a plastic material having a photocatalytic action and a luminous action that can be expected to be used in various applications.

  The present invention has a photocatalytic action and a luminous action on a plastic material, that is, a plastic raw material is mixed with a luminous agent that oscillates at a predetermined frequency and formed into an appropriate shape such as a plate shape or a sheet shape. A photocatalyst that reacts at a predetermined frequency oscillated from the phosphorescent agent and is excited is provided on the front surface or the back surface through a binder. Further, hydroxyapatite may be provided together with the photocatalyst on the front surface or the back surface of the plastic raw material, and using the phosphorescent plastic pellet as the phosphorescent agent, the mixing amount is 1 to 20 parts with respect to 100 parts of the plastic raw material. good.

  Further, as an invention of a plate material made of plastic material having photocatalytic action and luminous action, the plastic raw material is mixed with a luminous agent that oscillates at a predetermined frequency to form a plate shape, and the surface is oscillated at least from the luminous agent. It is preferable that a photocatalyst that reacts at a predetermined frequency to be in an excited state is provided, and hydroxyapatite may be provided on the surface of the plastic raw material together with the photocatalyst via a binder.

  Furthermore, as an invention of a sheet material of a plastic material having a photocatalytic action and a phosphorescent action, the plastic raw material is mixed with a luminous agent that oscillates at a predetermined frequency to form a sheet, and the surface oscillates at least from the luminous agent. It is preferable that a photocatalyst that reacts at a predetermined frequency to be in an excited state is provided, and hydroxyapatite may be provided on the surface of the plastic raw material together with the photocatalyst via a binder. The photocatalyst may be provided on the surface of the plastic raw material in a streak shape or a checkered pattern. The “sheet shape” referred to in the present invention includes a film shape.

  As in claim 1, the plastic raw material (1) is mixed with a phosphorescent agent (2) that oscillates at a predetermined frequency to form an appropriate shape such as a plate shape or a sheet shape. The photocatalyst (3), which reacts at a predetermined frequency oscillated from the agent (2) and becomes excited, obtains a plastic material provided via the binder (4), thereby making the photocatalyst action of the photocatalyst (3) more effective. It is possible to obtain a plastic material having photocatalytic action such as antibacterial, deodorizing, antifouling, water purification, air purification and phosphorescent action that spontaneously emits light and imparting semipermanent antibacterial properties. It will be possible.

  Since the hydroxyapatite (5) adsorbs organic substances efficiently by providing the hydroxyapatite (5) together with the photocatalyst (3) on the front or back surface of the plastic raw material (1) as in claim 2, the photocatalytic action Will be strengthened.

  The phosphorescent agent (2) is used by using phosphorescent plastic pellets as the phosphorescent agent (2) as shown in claim 3, and the mixing amount is 1 to 20 parts with respect to 100 parts of the plastic raw material (1). In the case of mixing with the plastic raw material (1), a molded product can be easily produced with the blending ratio of the luminous phosphor pellets, and a conventional molding machine can be used, and the photocatalyst (3) can be used depending on the mixing amount of the luminous agent (2). ) Changes, so that it is possible to obtain a molded product that meets the specifications. Further, since the phosphorescent agent (2) is uniformly distributed, the photocatalyst (3) can be uniformly excited, and the moldability is improved and the strength is improved as compared with the conventional fine powder.

  As shown in claim 4, the plastic raw material (1) is mixed with a phosphorescent agent (2) that oscillates at a predetermined frequency to form a plate shape, and at least the surface of the plastic raw material (1) is oscillated from the phosphorescent agent (2). By obtaining a plastic material plate (A) provided with a photocatalyst (3) that reacts at a predetermined frequency to be excited, various containers and three-dimensional shapes can be obtained, and various products can be expected. . In particular, when formed in a container as shown in FIG. 6, illumination light or the like is accumulated from the outside of the container by the phosphorescent agent (2), and the accumulated light can be activated by bringing the photocatalyst (3) into an excited state. In addition, the photocatalytic action can be obtained from the entire inner wall.

  According to claim 5, by providing hydroxyapatite (5) together with the photocatalyst (3) through the binder (4) on the surface of the plastic raw material (1), the hydroxyapatite (5) efficiently removes organic matter. Since it is adsorbed, the plate material (A) is further enhanced in photocatalytic action.

  As in claim 6, the plastic raw material (1) is mixed with a phosphorescent agent (2) that oscillates at a predetermined frequency to form a sheet, and the surface is oscillated at least from the phosphorescent agent (2). The plastic material sheet (B) provided with a photocatalyst (3) that reacts at a predetermined frequency and becomes excited has a photocatalytic action such as antibacterial, deodorizing, antifouling, purified water, and air purification and a phosphorescent action that spontaneously emits light. Since it can be easily folded and wrapped, it can be expected to have a wide variety of products.

  As shown in claim 7, the surface of the plastic raw material (1) is provided with hydroxyapatite (5) together with the photocatalyst (3) via the binder (4), so that the hydroxyapatite (5) contains organic matter. In order to adsorb efficiently, it becomes a sheet material (B) whose photocatalytic action is further strengthened.

  When the object is placed on the surface of the sheet material (B) by providing the photocatalyst (3) on the surface of the plastic raw material (1) in a streaky or checkered pattern as shown in claim 8, from the back surface Can store light from the surface of the sheet material (B) even when it is in a state where light cannot enter and can not be stored, it is possible to activate the photocatalytic action, and a wider range of applications can be expected.

  FIG. 1 is a diagram showing an embodiment of the present invention, which will be described. (1) is a plastic raw material, and the plastic raw material (1) includes polyethylene, polypropylene, nylon, polystyrene, ABS resin, polyamide, polyester, polycarbonate, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, vinyl alcohol. A plastic material such as a copolymer, an acrylic resin, an acrylonitrile copolymer, a polyimide, a phenol resin, a urea resin, or an epoxy resin may be used.

  (2) is a phosphorescent agent kneaded and mixed in the plastic raw material (1). The phosphorescent agent (2) is formed by mixing a plurality of known metal compounds and rare earths and mixing a general color developer. However, a product approved by the US FDA, for example, a phosphorescent plastic pellet of Easy Bright Co., Ltd. or a product made of phosphorescent plastic pellets of Nemoto Special Chemical Co., Ltd. may be used. The mixing amount is preferably 1 to 20 parts with respect to 100 parts of the plastic raw material (1). However, when the mixing amount of the phosphorescent agent (2) is 1 part or less, the photocatalyst (3) described later is used. Insufficient light to excite can not be emitted. On the other hand, if it is 20 parts or more, the photocatalytic action becomes too strong and the material itself is decomposed to cause deterioration, thereby shortening the life of the material. At the same time, an expensive phosphorescent agent (2) is often used and becomes expensive. The phosphorescent agent (2) has a spectrum oscillation peak that changes depending on the amount of the raw material, and also changes the color in which light is stored and the fluorescent color spontaneously emits light in the dark. However, the response type of the photocatalyst (3) Since the oscillation peak of the frequency that causes the excited state differs depending on the type, the phosphorescent agent (2) having the peak of the spectral oscillation that matches the type of the photocatalyst (3) is selected and used. The oscillation peak spectrum changes as shown in FIG. 5 depending on the amount of the raw material of the phosphorescent agent (2), which will be described. The bold line (showing red) in the figure is the visible wide area, the middle line (showing blue) and the thin line (showing green) show the ultraviolet range, and spontaneous emission is split into the above three types, When the lights having different spectral oscillation peaks are combined, the phosphorescent agent (2) emits blue light as shown in FIG. 5 (a), purple light as shown in FIG. 5 (b), or FIG. 5 (c). Thus, green light is emitted. In addition, the graph of each oscillation peak spectrum of FIG. 5 is the data material content of three types of luminous agents (2) of Easy Bright Co., Ltd.

  (3) is a photocatalyst that is provided on the surface of the plastic raw material (1) and reacts at a predetermined frequency oscillated from the phosphorescent agent (2) to be in an excited state. A response type and a visible light response type may be used, but are not particularly limited. Moreover, it is preferable to use titanium dioxide, copper oxide or the like as a general material. Further, each of the response types will be described in detail. First, the ultraviolet response type has a high ability to decompose organic substances, but when it receives ultraviolet rays (360 nm to 370 nm peaks), it enters an excited state and vigorously oxidatively decomposes nearby substances. Therefore, it is necessary to continue to supply energy having this peak value, and ultraviolet light with an oscillation frequency having this peak is only 3% or less in sunlight, and daily life such as in the home. There was a limit to using it for goods. Next, the visible light responsive photocatalyst (3) has a low ability to decompose organic matter, but it reacts with normal living light (visible light of 400 nm or more) and activates it, for example, inside a building, for example, an indoor fluorescent light or white light. It shows photocatalytic action even in places where only weak light exists. In addition, compounds other than titanium dioxide and copper oxide, for example, silica, alumina, zirconia, zeolite, ceramics, etc., can be used as a photocatalyst (3) that is activated by visible light if mixed into a predetermined compound. It becomes. Further, the photocatalyst (3) may be provided with only the photocatalyst (3) by means of coating, coating treatment, thermal spraying or the like without using the hydroxyapatite (5) described later.

  (4) is a binder used when the photocatalyst (3) is provided on the surface of the plastic raw material (1), and a commercially available product generally used may be used as the binder (4). (5) is a hydroxyapatite provided on the surface of the plastic raw material (1) together with the photocatalyst (3). As the hydroxyapatite (5), “APACERAM” manufactured by Pentax may be used. The hydroxyapatite (5) also serves to adsorb organic substances and carry the photocatalyst (3). In this construction, a binder (4) is applied on the plastic raw material (1), and a photocatalyst (3) and a hydroxyapatite (5) are provided thereon.

  Next, the case where the plastic material of the present invention is manufactured will be described. First, the polyethylene plastic raw material (1) is mixed with a phosphorescent plastic pellet of the phosphorescent agent (2) having an oscillation peak value at 370 nm to form an appropriate shape such as a plate shape or a sheet shape. At this time, as a phosphorescent plastic pellet of the phosphorescent agent (2), the product of Easy Bright Co., Ltd. is used, and the mixing amount is 5 parts with respect to 100 parts of the plastic raw material (1) and put into a molding machine. In the case of selecting the phosphorescent agent (2), if the oscillation peak of the frequency is selected so that the effect is more exerted by the oscillation peak of the frequency at which the photocatalyst (3) reacts to cause an excited state. good. Then, it shape | molds in plate shape or a sheet form, a binder (4) is apply | coated to the whole surface, and a hydroxyapatite (5) is also provided in the whole surface with a photocatalyst (3). A white fine powder of titanium dioxide is used for the photocatalyst (3) at this time.

  2 is a plate material (A) of a plastic material having a photocatalytic action and a phosphorescent action, and FIGS. 3 and 4 are sheet materials (B) of a plastic material having a photocatalytic action and a luminous action, and the sheet material (B). The photocatalyst (3) is provided on the surface of the substrate so as to form a streak-like or checkered pattern. At this time, after molding the plastic material into a predetermined three-dimensional shape, at least the photocatalyst (3) may be provided on the outer wall in the entire inner wall or in a streak-like or checkered pattern. Further, not only the photocatalyst (3) is provided on the entire surface of the plate (A), but also the photocatalyst (3) is formed on the plate (A) so as to have a streak-like or checkered pattern as shown in FIGS. It may be provided on the surface. Further, when the plate material (A) or the sheet material (B) is formed into a predetermined shape, the phosphorescent agent (2) itself emits light spontaneously, which also serves as an interior that has not existed before. In addition, as a method of blending the phosphorescent agent (2) into the plastic raw material (1) for molding, any molding method such as an extrusion molding method, an injection molding method, or a compression molding method may be used. At this time, a coloring agent, a lubricant, a stabilizer, a plasticizer, an antistatic agent, a flame retardant, a reinforcing fiber, and the like may be added.

  Next, a method of using the present invention will be described. First, the plate material (A) of the plastic material having the photocatalytic action and the luminous action of the present invention will be described. First, a plurality of the plate materials (A) are prepared, and formed into a suitably shaped container so that the photocatalyst (3) side provided on the entire surface of the plate material (A) is inside (see FIG. 6). Then, since the entire inner wall is surrounded by the photocatalyst (3), when food or drink or medicine is put in the container, the light irradiated from the outside of the container is stored by the phosphorescent agent (2) mixed with the plastic raw material (1). The Then, for example, light having a wavelength of 370 nm is emitted from the phosphorescent agent (2), and the entire photocatalyst (3) on the inside reacts to be in an excited state, so that the photocatalytic action is efficiently exhibited and enters the container. It is possible to sterilize various bacteria of the fungus that is used, and it becomes an antibacterial container that is unlikely to cause quality deterioration or freshness deterioration of the contents, and it also has the functions of purifying and deodorizing, sterilizing, insect-proofing, rust-proofing, and pollution-proofing the surrounding air It will be prepared. At this time, the photocatalyst (3) reacts most and the ultraviolet light having an oscillation peak value that brings out a greater effect is always emitted from the phosphorescent agent (2). Thus, by selecting the phosphorescent agent (2) that matches the peak value of the photocatalyst (3), the photocatalytic action of the photocatalyst (3) can be efficiently extracted. On the other hand, since the phosphorescent agent (2) itself spontaneously emits light in the entire container, when this container is observed in a dark place, it emits fluorescence, and the entire container shines and emerges cleanly. This makes it possible to immediately understand the location of the container in a dark place, and at night, it exhibits even better safety and guidance when a disaster occurs. Since light can also be stored, the effect of the photocatalyst (3) can be enhanced and sustained for a long time.

  Next, the usage method of the sheet material (B) of the plastic material which has the photocatalytic action and the luminous action of this invention is demonstrated. As shown in FIGS. 3 and 4, a sheet material (B) provided with a photocatalyst (3) in a streaky or checkered pattern is prepared in advance. First, the photocatalyst (3) provided on the sheet material (B) is placed so that the photocatalyst (3) is on the top, and when used as a sheet, indoor light from the surface is accumulated by the phosphorescent agent (2) and the phosphorescent agent (2) itself. Is spontaneously emitted, and, for example, when the blue light-emitting phosphorescent agent (2) shown in FIG. 5A is used from the phosphorescent agent (2), light mainly having wavelengths of 370 nm and 483 nm is emitted. Because of this light, the photocatalyst (3) reacts to light having a wavelength of 370 nm and exerts a photocatalytic action. Therefore, bacteria around the sheet material (B) are sterilized to eliminate deodorization and mold in the room. Effects such as suppression and air purification are exhibited. In addition, if the sheet material (B) is placed on the entrance or the like, the sheet material (B) emits blue light even if the lighting fixture is not turned on, so a key, a flashlight, a disaster prevention article, etc. It is very useful to know the whereabouts immediately and take them out immediately. Further, when the sheet material (B) is formed for packaging or in a bag body, it is preferable to use a photocatalyst (3) provided on the entire inner side, and the contents stored in the sheet material (B) are deteriorated in quality or freshness. Since it does not easily deteriorate and antibacterial agents and preservatives for maintaining quality are not added to the sheet material (B), it is safe for sensitive users against these antibacterial agents and preservatives. It can be used with heart. In addition, at this time, since the phosphorescent agent (2) itself spontaneously emits light such as blue, the entire sheet material (B) can be clearly seen even in a dark place. Further, the sheet material (B) can be used for various purposes other than the above. Further, if the sheet material (B) is used by laying it in the trunk of a car, it can store light in a short time. For example, even if fish caught by fishing is inserted, the smell of the fish is deodorized by the photocatalyst (3). If the sheet material (B) is used for automobile interiors, the sheet material (B) has a deodorizing ability.

  When the material of the present invention is used in this way, the photocatalyst (3) is provided because the phosphorescent agent (2) is substantially uniformly mixed in the entire plastic raw material (1) and the photocatalyst (3) is provided on the entire surface. UV light that needs photocatalyst (3) after absorbing and storing light energy in daily life, such as sunlight and fluorescent lamps, as a means to irradiate UV light (method of supplying UV energy) The energy oscillates the necessary ultraviolet rays of the photocatalyst (3) from the phosphorescent agent (2) itself and spontaneously emits light, and can continue to be supplied effectively without the need for special dedicated equipment such as a power source. In addition, since the product of the present invention has both a phosphorescent action and a photocatalytic action, it is semipermanently provided with air purification, deodorization, sterilization, insect prevention, rust prevention, and contamination resistance.

  The product of the present invention is a member such as a handrail or a bed that is easily contaminated with bacteria and dirt at hotels and hospitals, a water storage tank, a wash unit, a bacteria box, a trash can, a container for drugs and cosmetics, etc. , Trash can with deodorant effect, air conditioner filter, household items such as washing baskets, toilet seats, pipe joint parts used in hospitals, fake green artificial flowers and foliage plants Become. The plate material (A) can be used for building members such as panels, partitions, flooring materials, partitions, doors, baseboards, parting, etc., and various accessories such as containers, various parts, stationery, cutting boards and kitchens. It can be used for household and office use such as sanitary products such as supplies, toilet boxes, bathroom products, reception equipment, etc., and also for horticulture, OA equipment, industrial use, public use, hospital use, agriculture use, livestock use, and fishery processing It can also be used in a wide range of applications. Furthermore, the sheet material (B) can be used for wallpaper, ceiling sound-absorbing materials, flooring materials, footwear, clothing, bedding, rugs, tatami mats, filters, louvers and other equipment covers, bran and other building materials and household materials. In addition, it is possible to use various kinds of members that exhibit effects such as deodorization, mold suppression, and air purification, and covering materials thereof.

It is explanatory drawing which shows embodiment of this invention. It is explanatory drawing which shows the board | plate material of this invention. It is explanatory drawing which shows the pattern in which a photocatalyst is provided in the sheet | seat material surface of this invention. It is explanatory drawing which shows another pattern in which a photocatalyst is provided in the surface of the sheet | seat material of this invention. It is explanatory drawing which shows the spectral state of three colors at the time of the oscillation peak spectrum of the luminous agent used by this invention emitting blue light, purple light emission, and green light emission. It is explanatory drawing which shows the cross section of the container formed with the board | plate material of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plastic raw material 2 Phosphorescent agent 3 Photocatalyst 4 Binder 5 Hydroxyapatite

Claims (8)

  The plastic raw material (1) is mixed with a phosphorescent agent (2) that oscillates at a predetermined frequency to be formed into an appropriate shape such as a plate shape or a sheet shape. A plastic material having a photocatalytic action and a phosphorescent action, wherein a photocatalyst (3) that reacts at a predetermined frequency to be oscillated and is excited is provided via a binder (4).   The plastic material having a photocatalytic action and a phosphorescent action according to claim 1, wherein hydroxyapatite (5) is provided together with the photocatalyst (3) on the front surface or the back surface of the plastic raw material (1).   The plastic material having a photocatalytic action and a luminous action according to claim 1, wherein the luminous agent (2) is a luminous plastic pellet, and a mixing amount thereof is 1 to 20 parts with respect to 100 parts of the plastic raw material (1). .   The plastic raw material (1) is mixed with a phosphorescent agent (2) that oscillates at a predetermined frequency to form a plate shape, and the surface reacts at least with the predetermined frequency oscillated from the phosphorescent agent (2). A plate material made of a plastic material having a photocatalytic action and a phosphorescent action, characterized in that a photocatalyst (3) in an excited state is provided.   The plate material for a plastic material having a photocatalytic action and a phosphorescent action according to claim 4, wherein the surface of the plastic raw material (1) is provided with hydroxyapatite (5) together with the photocatalyst (3) via a binder (4). .   The plastic raw material (1) is mixed with a phosphorescent agent (2) that oscillates at a predetermined frequency to form a sheet, and the surface reacts at least with the predetermined frequency oscillated from the phosphorescent agent (2). A sheet material of a plastic material having a photocatalytic action and a luminous action, characterized in that a photocatalyst (3) that is in an excited state is provided.   The sheet of plastic material having photocatalytic action and luminous action according to claim 6, wherein the surface of the plastic raw material (1) is provided with hydroxyapatite (5) together with the photocatalyst (3) via a binder (4). Wood. The sheet material of the plastic material which has a photocatalytic action and a luminous action of Claim 6 or 7 with which the photocatalyst (3) on the surface of the said plastic raw material (1) was provided in the shape of a stripe or a lattice pattern.