Nowadays people use some cosmetics container, a lot of is a kind of can be squeezed vacuum flask, we at the time of use by pressure, very convenient.
Cosmetics if extrusion type vacuum flask, you will need to is a better choice for the material of the bottle, should be not easily broken, good is the ability to choose plastic material, not easy broken, and pressure is stronger.
In general, the cosmetics bottles, bottles are internal site there will be a free activity, and then use will slowly move to the above, in the process of until the bottle's contents is about to run out of time and the tray will be in the position of the distance to the top of the bottle is closer.
Vacuum flask is made up of a cylinder into spheroid container plus a placed at the bottom of the piston.
Its design principle is to use a contraction of the spring force, and do not let air into the bottle, create a vacuum, and the use of atmospheric pressure to push the bottom of the piston to move forward.
Is a major category in the cosmetics packaging material, cosmetics manufacturer
of professional requirement is very high.
Appearance: vacuum bottle, lotion bottle caps should be complete, bright and clean, no crack, burr, deformation, oil, shrink, thread clear and full;
Vacuum bottle, lotion bottle should be complete, smooth, bright and clean, bottle straight, smooth, full of thread, no burr, holes, no obvious scar, stain, deformation, no obvious dislocation line.
Transparent bottle should be transparent clear.
Vacuum flask can effectively the quality of the products, to maintain freshness.
But because the structure of the vacuum is more complex, so in terms of price is relatively high.
Now we are not in use of vacuum flask.
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