Cleaning-free powder coating method for T8 straight LED powdered tube

A no-cleaning and powder-coating technology, which is applied in coatings, polyether coatings, and devices for coating liquid on the surface, can solve problems such as uneven powder layer thickness, different light transmittance of powder tubes, and reduced work efficiency. Achieve the effect of good thickness uniformity, good dispersion, and not easy to fall off

Active Publication Date: 2016-11-23
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, after the above-mentioned technical solution is coated with powder, the thickness of the powder layer formed on the inner wall of the glass tube after the slurry solidifies 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

[0025] A no-clean powder coating method for a T8 straight tube LED powder tube, comprising the following steps:

[0026] a. Powder preparation: Weigh the following raw materials respectively: 800mL resin glue dilution, 1.5mL leveling agent 420, 40mL 10wt% FD-40 dispersant solution, 40mL 10wt% N-80 hydrophilic agent, 2.5mL P- 76 defoaming agent, 800mL water; weigh S-833 water-soluble diffusing powder with a liquid-solid ratio of 800mL / 1kg of the resin glue. The resin glue diluent is prepared by diluting S-3501 water-based acrylic resin and water in equal volumes.

[0027] Add the dispersant solution to the water; then add the water-soluble diffusing powder and stir for 60 minutes; continue to add the resin glue dilution and stir for 30 minutes; then add the remaining raw materials and stir for 12 hours. After mixing the above raw materials, pass through a 300-mesh filter cloth to obtain a slurry, add water to adjust the specific gravity of the slurry to 1.28-1.32g / cm 3 , Meas...

Embodiment 2

[0034] A no-clean powder coating method for a T8 straight tube LED powder tube, comprising the following steps:

[0035] a. Powder preparation: Weigh the following raw materials respectively: 750mL resin glue dilution, 1mL leveling agent 420, 35mL 12wt% FD-40 dispersant solution, 35mL 10wt% N-80 hydrophilic agent, 2mL P-76 disinfectant Foaming agent, 700mL water; Weigh S-833 water-soluble diffusing powder with a liquid-solid ratio of 800mL / 1kg of the resin glue. The resin glue diluent is prepared by diluting S-3501 water-based acrylic resin and water in equal volumes.

[0036]Add the dispersant solution to the water; then add the water-soluble diffusing powder and stir for 40 minutes; continue to add the resin glue dilution and stir for 20 minutes; then add the remaining raw materials and stir for 14 hours. After mixing the above raw materials, pass through a 250-mesh filter cloth to obtain a slurry, add water to adjust the specific gravity of the slurry to 1.28-1.32g / cm 3 ,...

Embodiment 3

[0043] A no-clean powder coating method for a T8 straight tube LED powder tube, comprising the following steps:

[0044] a. Powder preparation: Weigh the following raw materials respectively: 850mL resin glue dilution, 2mL leveling agent 420, 45mL 8wt% FD-40 dispersant solution, 45mL 10wt% N-80 hydrophilic agent, 3mL P-76 disinfectant Foaming agent, 8mL of sodium salt of naphthalenesulfonic acid formaldehyde condensation product with a relative molecular weight of 3000-5000 and a sulfonation degree of more than 80%, 12 mL of polyphenol with a solid content of 40wt% and a relative molecular weight of 80,000-120,000 Oxygen resin, 900mL water; Weigh S-833 water-soluble diffusion powder with a liquid-solid ratio of 800mL / 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 method of polyphenol oxygen resin is: under inert gas atmosphere, add bisphenol A type epoxy resin, bisphen...

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PUM

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Abstract

The invention relates to the technical field of preparation of powdered tubes and discloses a cleaning-free powder coating method for a T8 straight LED powdered tube. The cleaning-free powder coating method for the T8 straight LED powdered tube comprises the steps of powder blending, specifically, resin glue diluent, a flatting agent, a dispersing agent solution, a hydrophilc agent, a defoaming agent, water and water-soluble diffusion powder are weighed, all the raw materials are evenly mixed and then filtered, so that powder pulp is obtained, the proportion and viscosity of the powder pulp are adjusted, and the mixture stands after being evenly stirred for lateral use; b, powder coating, specifically, the inner walls of tube openings in the two ends of a T8 straight glass tube are coated with wax, then powder coating is conducted, and a semi-finished T8 straight LED powdered tube is obtained after powder coating; c, checking, specifically, the light transmittance of all portions of the semi-finished T8 straight LED powdered tube is checked; and d, braking, specifically, the qualified semi-finished T8 straight LED powdered tube is selected and baked, and then the finished T8 straight LED powdered tube is obtained. According to the cleaning-free powder coating method for the T8 straight LED powdered tube, the process is simple, and the powdered tube does not need to be cleaned after being coated with powder; the consistency of the thickness of a powder layer of the prepared powdered tube is good, and the light transmittance of all the portions of the powdered tube is basically the same; and meanwhile, the bonding degree of the powder layer and the glass tube is good, and falling is unlikely to occur.

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 a T8 straight tube LED powder tube. 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 mach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/22B05D3/02C09D133/00C09D161/00C09D171/12C09D7/12
CPCB05D3/0254B05D7/222C08L2205/03C09D7/40C09D133/00C08L61/00C08L71/12
Inventor 刘珍菊何复道
Owner 浙江江山三友电子有限公司
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