Lamp solder paste

Abstract

The invention discloses a lamp holder welding paste prepared from rosin, shellac, 217 phenol-formaldehyde resin, ethyl alcohol, thermal-conductive carbon fibers, a zinc sulfide powder, a barium sulfate powder, a calcium carbonate powder and silicon modified polyurethane. The welding paste can maintain a paste state for a long term, is not easy to dry, can be well attached on a foam body root, has low curing temperature and fast heat conduction, improves the finished product rate of welding of lamp bulbs and lamp holders, and extends the lamp bulb service life.

Description

technical field

[0001] The invention relates to a composition, in particular to a lamp cap welding paste used in the production of electric lamp bulbs for coating on bulbs and capable of welding the bulb and the lamp cap together. Background technique

[0002] In the production of electric lamps, especially automotive lighting lamps, the filament and the light pole are welded and put into the bulb body for sealing. Heating welds the hair bulb on the lamp head. The existing welding paste is generally in the form of powder, and its composition mostly contains phenolic resin, shellac, rosin and some inorganic fillers. When used, it is mixed with alcohol into a paste, and then applied to the lamp holder, and then inserted into the hair bubble for heating and curing to achieve adhesion. catch. This kind of welding mud powder has many inconveniences and disadvantages in use. For example, the alcohol is easy to volatilize after being mixed with alcohol, so that the welding mud is...

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