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Preparation method of environmentally-friendly halogen-free soldering flux

A kind of flux, environment-friendly technology, applied in the field of preparation of environment-friendly halogen-free flux, can solve the problems of strong electrical corrosion, halogen ion residue, many residues and so on

Inactive Publication Date: 2018-06-22
刘滨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is aimed at the fact that the halogen-containing flux commonly used in the electronic industry has a large amount of halogen ion residues after use, has strong electrical corrosion, and has many residues after solder welding, which is easy to cause serious pollution to the air. Defects, a preparation method of environment-friendly halogen-free flux is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Weigh ginkgo and fresh grapes according to the mass ratio of 1:5, wash them once with deionized water, put them into a tissue pulverizer, and pulverize them for 20 minutes to obtain a mixed pulverized product, and then mix the pulverized product and sucrose in a mass ratio of 5:1 After mixing, the fermentation substrate is obtained; the fermentation substrate is put into the fermenter, and the loading amount is controlled to be 2 / 3 of the volume of the fermenter. Sealed fermentation for 15 days, after the fermentation is over, filter and separate to obtain the filtrate, centrifuge the filtrate with a centrifuge at a speed of 3000r / min for 10min, separate and obtain the upper layer liquid, and set aside; take fresh egg yolk liquid, and mix it according to the mass ratio of 1:3 Egg yolk liquid and acetone are mixed and put into a beaker, stirred and mixed with a magnetic stirrer at a speed of 300r / min for 20 minutes, left to age for 5 hours after the stirring is completed,...

example 2

[0026] Weigh ginkgo and fresh grapes according to the mass ratio of 1:5, wash them once with deionized water, put them into a tissue pulverizer, and pulverize them for 25 minutes to obtain a mixed pulverized product, and then mix the pulverized product and sucrose in a mass ratio of 5:1 After mixing, the fermentation substrate is obtained; the fermentation substrate is loaded into the fermenter, and the loading amount is controlled to be 2 / 3 of the volume of the fermenter. Sealed fermentation for 18 days, after the fermentation is over, filter and separate to obtain the filtrate, centrifuge the filtrate with a centrifuge at a speed of 3500r / min for 13min, separate and obtain the upper layer liquid, and set aside; take fresh egg yolk liquid, and mix it in a mass ratio of 1:3 Egg yolk liquid and acetone are mixed and put into a beaker, stirred and mixed with a magnetic stirrer at a speed of 350r / min for 25 minutes, left to age for 5 hours after the stirring is completed, and filt...

example 3

[0028]Weigh ginkgo and fresh grapes at a mass ratio of 1:5, wash them twice with deionized water, put them into a tissue grinder, and grind for 30 minutes to obtain a mixed grind, then mix the mix and sucrose in a mass ratio of 5:1 After mixing, the fermentation substrate is obtained; the fermentation substrate is loaded into the fermenter, and the loading amount is controlled to be 2 / 3 of the volume of the fermenter. Sealed fermentation for 20 days, after the end of fermentation, filter and separate to obtain the filtrate, centrifuge the filtrate with a centrifuge at a speed of 4000r / min for 15min, separate and obtain the upper layer liquid, and set aside; take fresh egg yolk liquid, and mix it according to the mass ratio of 1:3 Egg yolk liquid and acetone are mixed and put into a beaker, stirred and mixed with a magnetic stirrer at a speed of 400r / min for 30 minutes, left to age for 6 hours after the stirring is completed, and filtered and separated to obtain a filter cake af...

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Abstract

The invention relates to the technical field of soldering, and specifically relates to a preparation method of an environmentally-friendly halogen-free soldering flux. The method is characterized in that gingko containing rich active substances which are terpene lactones and flavonoids compounds and grape containing rich organic acid are treated as the raw materials and are mixed and fermented toobtain self-made fruit wine; lecithin is extracted from egg yolk through the self-made fruit wine to obtain extracted liquid; the extracted liquid and other raw materials are mixed to obtain the environmentally-friendly halogen-free soldering flux. According to the method, the prepared soldering flux is free from halogen raw material; the preparation processes are environmentally friendly and do not cause pollution; and moreover, the finished product is halogen-free and nontoxic; halogen ion residues and corrosion are not found after use; little residues are caused after soldering of the soldering flux and cannot lead to severe air pollution. Therefore, the method is safe and environmentally friendly, and has a good application prospect.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a preparation method of an environment-friendly halogen-free flux. Background technique [0002] With the wide application and development of lead-free solder in the electronics industry, flux has become an important auxiliary material in surface mount technology. Compared with tin-lead solders, most lead-free solders have the problems of high cost, high melting point, poor wettability, and easy oxidation. Therefore, the development of a flux with excellent performance that is used in conjunction with lead-free solder has increasingly become the focus and focus of people's research. [0003] In welding, the oxide layer formed on the metal surface will hinder the welding effect, and some special substances are usually used to remove these oxides to achieve good welding. People call this substance that can purify the surface of the volatilized metal and help soldering flux. Flu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362
CPCB23K35/362
Inventor 刘滨林茂兰
Owner 刘滨
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