Dust-free blackboard writing liquid and preparation method thereof

Abstract

The invention relates to the teaching field and particularly relates to a dust-free blackboard writing liquid and a preparation method thereof. A following technical scheme is adopted: the dust-free blackboard writing liquid is characterized by comprising the following components: benzoic acid, a color-developing combination agent and a volatile perfume substance, wherein the volatile perfume substance is one or more of decalactone, acetophenone, cinnamaldehyde, eugenol, ethyl cinnamate and p-isopropyl benzene. By being prepared with a special liniment and injected into a special-purpose writing pen, the writing liquid can replace chalks for being used for dust-free writing. The dust-free blackboard writing liquid adopting the technical scheme has the beneficial effects that the perfumes are volatilized during usage, so that odorous smell is covered without affecting normal application of the dust-free writing liquid. The dust-free blackboard writing liquid disclosed by the invention is simple in formula, lower in cost, and simple and convenient in manufacturing process, does not produce precipitates after being placed for a long time, has characteristics of being dustproof, non-toxic, free from pungent odor, smooth in writing and clear in handwriting, and suitable for daily teaching application. And moreover, the dust-free writing fluid can completely eliminate environmental damages caused by chalk dust pollution, and can overcome the defects that the common writing pen is unsmooth in writing, unclear and not clean in erasing.

Description

technical field [0001] The invention relates to the teaching field, in particular to a dust-free board writing fluid and a preparation method thereof. Background technique [0002] "Blackboard chalk" is a representative of traditional teaching methods, and it is also the most widely used and oldest teaching method. However, chalk is written by friction, which is laborious to write, has friction sound, and is easy to break when writing. Especially in the process of writing and erasing, a large amount of dust will be generated, which seriously pollutes the teaching environment and endangers the health of teachers and students. There have also been "dust-free chalk", "dust-free chalk", "magnetic chalk" etc. for this reason, but their production technology and raw materials and writing methods do not completely overcome the disadvantages of chalk dust. [0003] In order to fundamentally solve the problem of pen dust, there are many kinds of dust-free board writing fluids on the...

AI Technical Summary

Problems solved by technology

[0004] Traditional writing liquids have unpleasant odors, which will affect people's learning efficiency under the long-term influence of these odors. This phenomenon has long-term affected the mass promotion and use of this product