JP3015336U - Luminous ping pong ball - Google Patents

Abstract

(57) [Abstract] [Purpose] It is intended to provide a ping-pong ball that emits light by utilizing a luminous phenomenon. [Structure] By using a phosphorescent dye that uses strontium aluminate activated by europium or the like as a phosphorescent agent in a ping-pong ball, the ping-pong ball emits light.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ping-pong ball that emits light according to a light-storing phenomenon, which has a light-storing property obtained by using a light-storing agent such as a light-storing paint.

[0002]

[Prior art]

 Conventionally, in order to make a ping-pong ball emit light, there is a method of using a light-storing agent that emits light by radiating the energy stored by being stimulated by natural light such as the sun or the moon, an ultraviolet lamp, or an electric lamp, and then converting it into light. there were.

Inorganic compounds having a light-storing property used as a light-storing agent include sulfide-based compounds such as zinc sulfide and cadmium sulfide, and oxyacid salt-based compounds such as strontium aluminate. Some radio-isotopes are fixed to sulfide-based or oxy-acid-based so that they continue to emit light due to radiation even after they disappear.

Among known oxyacid salt-based inorganic compounds, phosphorescent properties are particularly excellent, for example, activated with europium,

[Chemical 4] M is an alkaline earth aluminate consisting of magnesium, calcium, strontium or barium, strontium aluminate activated by neodymium and europium, barium-magnesium-aluminate activated by europium, etc. There is.

[0005]

[Problems to be Solved by the Invention]

 Since ping-pong balls are lightweight, it is necessary to select a luminescent agent that has highly efficient luminescent properties. Despite the existence of alkaline earth aluminate activated by europium etc., which has excellent phosphorescent properties, its practical application to ping-pong balls was difficult. One of the causes is that alkaline earth aluminum alloy activated by europium etc. sinters at a high temperature of 1200 ° C to 1750 ° C for several hours. The heat resistance of the product was required.

In addition, when a method widely used when an inorganic pigment is used as a paint, that is, a method in which a sintered product is crushed to an appropriate particle size and suspended in a binder, However, not only the excellent phosphorescent properties of alkaline earth aluminate are impaired, but also the coating is poorly glued, easily peeled off, and the durability is weak.

[0007]

[Means for Solving the Problems]

 By selecting an acrylic, urethane, or epoxy binder with strong adhesiveness, poor coating paste and easy peeling were improved. In addition, the excellent luminous properties of alkaline earth aluminates are impaired when they are compounded because the alkaline earth aluminates settle in the paint. In order to prevent the sedimentation of alkaline earth aluminate and release the stored energy efficiently, it is necessary to add cationic amino amide phosphate, anionic or neutral polycarboxylic acid, etc. as an anti-settling agent. Then, the problem was solved, and even if a cover layer was formed with a resin and alkaline earth aluminate was added to the cover layer, the phosphorescent property was not impaired.

[0008]

[Action]

 Addition of this new binder and anti-settling agent to a phosphorescent pigment whose main component is alkaline earth aluminate activated by europium or the like may impair the light storage performance of alkaline earth aluminate activated by europium or the like. That is, there is provided a coating material which does not prevent the energy that is stimulated and stored from being stored and converted into light, and which has a strong adhesion to a painted surface and is highly durable.

By using the phosphorescent paint of the present invention for a ping-pong ball to emit light, it can be expected to make it easier to play at night or in a dark place.

A ping-pong ball using the present invention will be described below with reference to examples. However, the ping-pong balls that can be used in the present invention are not limited to the illustrated drawings.

[0011]

【Example】

 Example 1 A preferred composition example of a phosphorescent paint using an alkaline earth aluminate activated by europium or the like is 30 to 40 parts of an acrylic resin varnish, 3 to 5 parts of an antisettling agent, and 5 parts of a solvent. 10 parts and 50 to 60 parts of the phosphorescent pigment. The acrylic resin varnish is, for example, a product name “Acrydeic A-167” which is a 50% toluene solution of acrylic resin manufactured by Dainippon Ink and Chemicals Incorporated, and the anti-settling agent is, for example, a product manufactured by Big Chemie. The name is "Anti-Terra-P".

Example 2 FIG. 1 is a sectional view of a ping-pong ball according to claim 1, wherein the phosphorescent paint described in claim 1 and exemplified in Example 1 is applied to the back surface. By applying it to the back surface, it is possible to prevent abrasion of the phosphorescent paint during use.

Example 3 FIG. 2 is a cross-sectional view of a ping-pong ball made of a resin containing the phosphorescent paint described in claim 1 and exemplified in Example 1. The resin containing the phosphorescent paint may be a resin widely used for ping-pong balls.

[0014]

[Effect of device]

 INDUSTRIAL APPLICABILITY As described above, the present invention can provide a ping-pong ball that emits light by a light-storing phenomenon. A ping-pong ball with this luminous property shows desired light emission and enhances visibility at night or in the dark.

[Brief description of drawings]

FIG. 1 is a sectional view of a ping-pong ball according to claim 1.

FIG. 2 is a sectional view of the ping-pong ball according to claim 2;

[Explanation of symbols]

 1 Ping-pong ball 2 Paint of the present invention 3 Resin containing the paint of the present invention

Claims (2)

[Scope of utility model registration request] Claims: And M is composed of a single element or a plurality of elements from magnesium, calcium, strontium or barium, and preferably strontium is used to form strontium aluminate ( ) Or barium-magnesium aluminate ([Chemical 3] ), Lantern, cerium, praseodymium, neodymium,
Promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lanthanoid elements of lutetium, manganese, tin, and bismuth are appropriately selected from one or several kinds, preferably europium alone or europium. A ping-pong ball characterized in that a phosphorescent paint using alkaline earth aluminate, which uses both gadolinium and gadolinium as an activator, is applied from the back side of a hollow ping-pong ball, and the part of the phosphorescent paint emits light due to a luminous phenomenon. 2. A ping-pong ball, which is made of a resin containing the alkaline earth aluminate according to claim 1 as a light-storing agent and emits light by a light-storing phenomenon.