Air sand and preparation method thereof

Abstract

The invention provides air sand and a preparation method thereof. Air clay is prepared from the components of: silicon dioxide, calcined shell powder, polyethylene glycol, polyvinyl alcohol, foam powder k12, glycerol and propylene glycol. The preparation method comprises the following steps of: (1) adding the silicon dioxide which is used as a main body, the calcined shell powder which is used as a molecular structure connecting carrier, and the polyethylene glycol, the polyvinyl alcohol and the foam powder k12 which are used as reaction elements into a heatable reaction kettle; (2) stirring when the reaction kettle rotates at a constant speed of 25rpm; (3) raising the temperature to ensure that the reaction elements fully react with the silicon dioxide and the calcined shell powder to achieve an effect of shaping micro-particles; (4) after the temperature is up to 120 DEG C, stopping heating and continuously mixing; (5) adding a propylene glycol solution with the concentration being about 70 percent, stirring, mixing, and adjusting the rotating speed of the reaction kettle to be 20 rpm; (6) lowering the temperature, adding the glycerol, and adjusting the rotating speed of the reaction kettle to be 40rpm; (7) rotating for 10 minutes to obtain the air sand. The method has the characteristics of reasonable technological process and high product yield.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to air sand which has antibacterial and bactericidal functions and a preparation method thereof. Background technique [0002] Children like to play with sand. Every time they play in the sand, they will forget the time. Some kindergartens have specially prepared sand venues for children. It is in line with their cognitive development that children like to play with sand. Moreover, playing with sand helps to strengthen children's perception, develops children's imagination, and helps children's fine motor development. The most common composition of sand is silicon dioxide, usually in the form of quartz. Because of its stable chemical properties, hard texture, high specific gravity, and easy breeding of harmful substances such as bacteria, its single molecular structure makes its plasticity and safety unable to be guaranteed. At present, the most high-grade Korean air sand in the...

AI Technical Summary

Problems solved by technology

Moreover, playing with sand helps to strengthen children's perception, develops children's imagination, and helps children's fine motor development. The most common composition of sand is silicon dioxide, usually in the form of quartz. Because of its stable chemical properties, hard texture, high specific gravity, and easy breeding of harmful substances such as bacteria, its single molecular structure makes its plasticity and safety unable to be guaranteed. At present, the most high-grade Korean air sand in the world is Korean air sand, which can be used in various shapes Molds are free to create, you can also use your imagination to conceive works, reuse, non-toxic and harmless, and free to shape, but there are also certain defects. For example, Korean air sand loses sand fluidity and looseness, and forms a hardened plate after being stepped on. It seems that ordinary river sand sinks after absorbing water, and it is difficult to shovel the hardened sand with the strength of children. The cost makes the price too high, and the purchasing power of ordinary families is limited.