JPH02273454A - Scattering prevention type fluorescent lamp - Google Patents

Abstract

PURPOSE:To form a strong coat which has no danger of causing environmental pollution nor fire and which is prevented from yellowing by forming transparent films of water dispersion high molecular polyester resin on the outer surface of a glass tube, and applying films thereto promptly and by a large amount using an application device. CONSTITUTION:After a straight fluorescent lamp horizontally held is immersed in a liquid containing water dispersion high molecular polyester by predetermined grams, the lamp is dried by hot air blown at 100 deg.C and at a speed of 5m/sec so that a transparent coat of polyurethane resin is formed on the outer surface of the glass tube. In this case, application is performed promptly and by a large amount using as application device. Since thus polyurethane resin i.e., water dispersion high molecular polyester resin does not contain organic solvents, a strong coat is formed which has no danger of causing environmental pollution nor fire and which is prevented from yellowing.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a novel shatterproof fluorescent lamp.

Since conventional fluorescent lamps use glass tubes, if the glass tubes are damaged due to improper handling, glass fragments may fly off and cause personal injury. As a way to deal with this, for fluorescent lamps, the outer surface of the glass tube is covered with a transparent tube made of polymer resin such as polyester resin.
So-called shatterproof fluorescent lamps are known. This is a method in which a glass tube is covered with a heat-shrinkable polyester resin tube, and then the tube is heat-treated to form a transparent polymer resin coating on the outer surface of the glass tube.

Problems to be Solved by the Invention In conventional shatterproof fluorescent lamps, tubes made of polyester resin are used in consideration of weather resistance, film strength, etc., as described above.

However, this tube is extremely expensive due to the difficulty of tube processing, and the process of manually covering the completed fluorescent lamp with the tube is extremely difficult to work with.For this reason, shatterproof fluorescent lamps are There was a problem in that they were extremely expensive compared to general fluorescent lamps.

The present invention has been made to solve the above-mentioned problems, and provides a shatterproof fluorescent lamp that is easier to form a coating than conventional fluorescent lamps and has good workability.

Means for Solving the Problems To achieve this object, the shatterproof fluorescent lamp of the present invention has a structure in which a transparent film is formed on the outer surface of a glass tube using a coating liquid made of a water-dispersed polymeric polyester resin. have.

According to the present invention, by forming a transparent water-dispersed polymeric polyester resin coating on the outer surface of a glass tube, a coating device can efficiently and quickly apply a large amount of a scattering prevention coating to the outer surface of the glass tube. Since the water-dispersed polymeric polyester resin does not contain organic solvents, it is a new coating material that poses no risk of environmental pollution or fire, and forms a strong coating that does not yellow.

Example Water-dispersed polymer polyester (manufactured by Toyobo Co., Ltd.: Vylonal MD1200) 15. After immersing a straight tube type 40 watt fluorescent lamp held horizontally in the OOgr solution,
It was dried with warm air at C15 m/s and EC to form a transparent film made of polyurethane resin on the outer surface of the glass tube. Using the thus obtained fluorescent lamp, the following drop strength test was conducted. First, when a fluorescent lamp was held horizontally and allowed to fall naturally from a height of 3 meters, the glass tube was broken, but the coating remained intact, and the glass pieces were firmly attached to the coating. , Therefore, the glass pieces were protected by the coating and there was no scattering. Next, as an impact test, a 200g steel ball attached to the end of a 1m long thread was exposed to a fluorescent lamp at an angle of 30 degrees from the vertical line, but the coating was not damaged at all. When the lamp was lit for 10,000 hours as a life test, it was found that the fluorescent lamp according to the present invention did not turn yellow and had no problems.

As described above, according to this embodiment, by forming a coating made of a transparent water-dispersed polymeric polyester resin on the outer surface of a glass tube using a coating liquid, the cost can be reduced by 1% compared to the conventional method.
It can be significantly reduced to /8 or less.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, the present invention forms a transparent coating made of a water-dispersed polymeric polyester resin on the outer surface of a glass tube, making it extremely easy to form a shatterproof coating on the glass tube compared to the conventional method. Moreover, since the material cost is low, it is possible to provide an anti-scattering plasma light lamp that can significantly reduce lamp cost compared to conventional lamps.

Claims (1)

[Claims] A shatterproof fluorescent lamp characterized by a transparent coating made of water-dispersed polymer polyester resin formed on the outer surface of the glass tube.