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No-cleaning powder coating method for straight tube lamps

A no-cleaning and powder-coating technology, which is applied in the manufacture of discharge tubes/lamps, discharge tube coatings, tube/lamp screens, etc., can solve problems such as long curing time, low quality, and reduced work efficiency. Good uniformity, short curing time and high work efficiency

Active Publication Date: 2017-12-29
浙江江山三友电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is complex in process, not convenient enough, and reduces work efficiency
[0005] In addition, in the powder coating method of the above technical solution, the powder slurry cannot be solidified quickly, and the curing time is long, so the working effect of the entire powder coating process is not high enough
After the slurry is solidified, the thickness of the powder layer formed on the inner wall of the glass tube is not uniform enough, resulting in different light transmittance at various parts of the powder tube, resulting in low quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A non-cleaning powder coating method for straight tube lamps, comprising the following steps:

[0025] a. Powder preparation: Weigh the following raw materials respectively: 600mL resin glue diluent, 20mL triethylene glycol divinyl ether, 15mL bis[2-(methacryloyloxy)ethoxy]dimethylsilane, 1mL iso Propylthioxanthone, 1.5mL leveling agent 420, 40mL 10wt% FD-40 dispersant solution, 40mL 10wt% N-80 hydrophilic agent, 2.5mL P-76 defoamer, 150mL ethanol, 650mL water; Weigh S-833 water-soluble diffusing powder with a liquid-solid ratio of 600mL / 1kg of the resin glue. The resin glue diluent is prepared by diluting S-3501 water-based acrylic resin and water in equal volumes.

[0026] Prepare a mixed solution of water and ethanol, add the dispersant solution to the mixed solution; stir for 60 minutes; continue to add the resin glue dilution, stir for 30 minutes; then add the remaining raw materials, stir for 12 hours. After mixing the above raw materials, pass through a 300-mes...

Embodiment 2

[0034] A non-cleaning powder coating method for straight tube lamps, comprising the following steps:

[0035] a. Powder preparation: Weigh the following raw materials respectively: 550mL resin glue dilution, 10mL triethylene glycol divinyl ether, 10mL bis[2-(methacryloyloxy)ethoxy]dimethylsilane, 0.5mL Isopropylthioxanthone, 1mL leveling agent 420, 35mL12wt% FD-40 dispersant solution, 35mL 10wt% N-80 hydrophilic agent, 2mL P-76 defoamer, 100mL ethanol, 600mL water; Take S-833 water-soluble diffusing powder with a liquid-solid ratio of 600mL / 1kg to the resin glue. The resin glue diluent is prepared by diluting S-3501 water-based acrylic resin and water in equal volumes.

[0036] Prepare a mixed solution of water and ethanol, add the dispersant solution to the mixed solution; stir for 40 minutes; continue to add resin glue dilution, stir for 20 minutes; then add the remaining raw materials, stir for 14 hours. After mixing the above raw materials, pass through a 250-mesh filter...

Embodiment 3

[0043] A non-cleaning powder coating method for straight tube lamps, comprising the following steps:

[0044] a. Powder preparation: Weigh the following raw materials respectively: 650mL resin glue diluent, 30mL triethylene glycol divinyl ether, 20mL bis[2-(methacryloyloxy)ethoxy]dimethylsilane, 1.5mL Isopropylthioxanthone, 2mL leveling agent 420, 45mL 8wt% FD-40 dispersant solution, 45mL 10wt% N-80 hydrophilic agent, 3mL P-76 defoamer, 8mL relative molecular mass in 3000-5000 Naphthalenesulfonic acid formaldehyde condensation product sodium salt with a sulfonation degree of more than 80%, 12 mL of polyphenol oxygen resin with a solid content of 40 wt% and a relative molecular mass of 80,000 to 120,000, 200 mL of ethanol, and 700 mL of water; Weigh S-833 water-soluble diffusing powder with a liquid-solid ratio of 600mL / 1kg of the resin glue. The resin glue diluent is prepared by diluting S-3501 water-based acrylic resin and water in equal volumes.

[0045] The preparation me...

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PUM

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Abstract

The invention relates to the technical field of preparation of powder tubes and discloses an efficient and no-clean powder coating method for a straight lamp tube. The method comprises the steps of: a, blending of powder: weighing a resin glue diluent, triethyleneglycol divinyl ether, bis[2-(methacryloxy)ethyoxyl] dimethylsilane, isopropyl thioxanthone, a flatting agent, a dispersing agent solution, a hydrophilic agent, an anti-foaming agent, ethanol, water and water-soluble diffusion powder; after uniformly mixing the raw materials, filtering the mixture with filter cloth to obtain powder slurry, adjusting the specific gravity and the viscosity of the powder slurry, uniformly stirring the adjusted powder slurry, and then standing for later use; b, coating of powder: waxing inner walls of tube orifices at two ends of a straight glass tube, then coating powder on the waxed inner walls, and obtaining a semi-finished product after coating the powder; c, inspection: carrying out light transmittance inspection on the semi-finished product; and d, baking: selecting the inspected semi-finished product, and baking the selected semi-finished product to obtain a finished product. According to the powder coating method, cleaning is not needed after coating of the powder; the curing time of the powder slurry is short; the thickness of a cured powder layer is good in uniformity, and the light transmittance is substantially the same; the binding degree of the powder layer and the glass tube is good; and the powder layer is not liable to fall off.

Description

technical field [0001] The invention relates to the technical field of powder tube preparation, in particular to a cleaning-free powder coating method for straight tube lamps. Background technique [0002] During the preparation process of the powder tube of the LED lamp, the inner wall of the glass tube needs to be coated with powder, and the quality of the powder coating directly affects the light transmission effect of the lamp tube. The current powder coating process generally uses a pump to pour the powder slurry from the upper end of the glass tube, so that the powder slurry is left by gravity, flows out from the lower end of the glass tube, and then bakes, thus forming a layer on the inner wall of the glass tube. Layers of powder. [0003] The Chinese patent that application number is 200910182998.0 discloses a kind of fluorescent tube powder coating method, comprises the following steps: (1) the bright tube that washs is put on the powder coating machine, blows into...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/22
CPCH01J9/223H01J2209/012
Inventor 刘珍菊何复道
Owner 浙江江山三友电子有限公司
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