Ultraviolet ray blocking protecting film powder slurry and its coating method to inner wall of pipe

A protective film and ultraviolet technology, which is applied in coating, tube/lamp screen manufacturing, etc., can solve the problem that the protective film coating technology is difficult to break through technical barriers, and achieve the effects of easy promotion, stable performance and low cost

Inactive Publication Date: 2007-01-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Now some countries have strict requirements on the amount of ultraviolet light leakage, and it is difficult to break through its technical barriers according to the existing protective film coating technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take rutile titanium dioxide with an average particle size of 10nm and a slurry concentration of 0.3wt%, and coat it on the inner surface of a 20W three-U lamp by spraying with a film thickness of 50nm, and then dry it in a hot blast furnace at 80 degrees Celsius to make 20W energy-saving lamp; its ultraviolet transmission power is 1.87μw / cm 2 , the initial luminous flux is 1250Lm, the luminous flux maintenance rate is 79% after 4000 hours, and the life span reaches 8000 hours.

Embodiment 2

[0015] Take anatase titanium dioxide with an average particle size of 10nm and a slurry concentration of 0.5wt%, and coat it on the inner surface of a 20W three-U lamp by spraying with a film thickness of 100nm, and then dry it in a hot-air furnace at 95 degrees Celsius. Made into a 20W energy-saving lamp; its ultraviolet transmission power is 1.31μw / cm 2 , the initial luminous flux is 1230Lm, the luminous flux maintenance rate is 81% after 4000 hours, and the life span reaches 10000 hours.

Embodiment 3

[0017] Take rutile titanium dioxide with an average particle size of 20nm and a slurry concentration of 1wt%, and coat it on the inner surface of a 15W three-U lamp by spraying with a film thickness of 150nm, and then dry it in a hot blast furnace at 100 degrees Celsius to make 15W Energy-saving lamp; its ultraviolet transmission power is 1.22μw / cm 2 , the initial luminous flux is 950Lm, the luminous flux maintenance rate is 82% after 4000 hours, and the life span reaches 10000 hours.

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Abstract

The present invention discloses ultraviolet ray blocking protecting film powder slurry and its coating method to inner wall of lamp tube. Titania, preferably of rutile type or anatase type, of grain size of 10-100 nm and water, preferably deionized water, is compounded into slurry of concentration 0.3-12 wt%, preferably 0.5-10 wt%. The slurry is coated to the inner surface of lamp tube and dried with hot blast of 80-140 deg.c to form a coating of 50-1500 nm, preferably 100-1000 nm, thickness. The present invention has the positive effects of low ultraviolet transmittance, high visible light transmittance, stable performance, long service life, etc.

Description

technical field [0001] The invention relates to a manufacturing process for a lamp tube, in particular to a protective film slurry for blocking ultraviolet radiation and a coating method for the lamp tube. Background technique [0002] In the lamp manufacturing industry, most of the aluminum oxide protective film coating technology is used at present. The lamps manufactured by this method still have a small amount of ultraviolet leakage, or although the ultraviolet leakage is solved, it is at the expense of affecting other properties. For example, Japanese patent JP 2002268481 discloses a mercury-containing fluorescent lamp, in which a protective film such as ultra-fine alumina is first coated, and then fluorescent powder is coated, thereby effectively reducing the sodium mercury formed by mercury and sodium in the glass lamp tube. The luminous flux maintenance rate of the fluorescent lamp has been greatly improved. However, the ultra-fine alumina, titania, silica and zirco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/00H01J9/20
Inventor 费林坤杨云霞周红袁双龙
Owner EAST CHINA UNIV OF SCI & TECH
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