The choose and buy of vacuum thermos method?
(4) insulation test: Because the vacuum vacuum flask adopts vacuum insulation technology, in vacuum condition, can be done to prevent heat transfer to the world, so as to achieve the effect of heat preservation. So to test the heat preservation effect will only 100 degrees of boiling water into the cup, two or three minutes, any part under the hand, take a look at it's hot, which parts if fever, the temperature will be lost from that place. Places like bottle tend to have a slight fever is a normal situation.
(3) sealing detection: Twist the cap first, see if cap and cup body, and then add boiling water in the bottle (preferably boiled water), two or three minutes, then bottle upside down to see whether there will be water seepage.
(2) from the exterior to identify. A look at the inner and outer bravery surface polishing is uniform, is there a bruised and scratched or burr; 2 see if mouth welding smooth, this is related to whether feel comfortable when drinking; Three see whether internal seal tightly, plug, and matches the cup body; Four see a bottle, the round the better, not mature process will appear round.
Sold on the market at present have many kinds of vacuum thermos, price difference is very big also, for some consumers do not understand the reason, often spent a lot of money can't buy gratified flexibly vacuum vacuum flask, warming Yang Yang home to tell you: before buy vacuum, vacuum flask, attention should be paid to: (1) the first label or instructions. General regular products manufacturers will have to write the model number of the people, the name, volume number, material, production address, manufacturer, standard, after-sales, using methods and so on. If none of that there is a problem.
(5) identification of plastic parts: Vacuum plastic should be used in the vacuum flask is food grade, the small plastic smell, surface brightness, no burr, long service life is not easy to aging. And ordinary plastic or recycled plastic smell great, colour and lustre is the feature of gray, burr, plastic aging more easy to fracture, stink after a long time. This will not only make the vacuum thermos shorten the life, also will be a threat to the health of our body. (6) the capacity of detection: For vacuum thermos is double, so the pot of the actual capacity and we can see there will be some discrepancy. First to see if the height of the depth of the inner and outer were similar (average 18 to 22 mm), many small factory in order to reduce costs, often in the material aspects that might affect the capacity. (7) identification of a stainless steel material: There are many different kinds of stainless steel material, 18/8 said the stainless steel materials containing 18% chromium, nickel, 8% reach the standard of material, accord with national food grade standards are green environmental protection product, the product rust and corrosion resistance. Ordinary stainless steel material to present pale or dark color, if in a concentration of 1% saline soak for 24 hours after can produce rusty spot, its part of the element to exceed bid, directly endanger human body health. Consumers in a vacuum, vacuum flask when the choose and buy not only see appearance, or name, and wang to see the instruction manual is marked as for double insulation or vacuum insulation, although now many don't vacuum thermos product appearance generous, novel styles, is actually a double insulation without vacuum, warming Yang Yang home to remind consumers don't make such a small mistake, must see clear outer instructions and manuals.
