How to maintain a vacuum flask
How to maintain a vacuum flask
1. Before using the vacuum flask , it must be scalded with boiling water (or add some edible detergent for several times to perform high temperature disinfection.)
2. Before use, please preheat (or pre-cool) with boiling water (or cold water) for 5-10 minutes for better thermal insulation.
3. Please overfill the water in a hurry to avoid scalding from the overflow of boiling water when the lid is tightened.
4. Please drink slowly when drinking hot drinks to avoid burns.
5. It is not advisable to store carbonated beverages such as milk, milk products and fruit juices for a long time.
6. After drinking, please tighten the lid of the cup to ensure hygiene and cleanliness.
7. Use a soft cloth and food detergent diluted with warm water when cleaning. Do not use alkaline bleach, metal dishcloths, chemical rags, etc.
8. The inner side of the stainless steel cup sometimes produces some red rust spots due to the influence of iron and other substances in the contents. It can be soaked in warm water and diluted vinegar for 30 minutes, and then fully cleaned.
9. In order to prevent the generation of peculiar smell or stains, and it can be used for long-term cleaning. After use, please wash and dry thoroughly.
10. The inner tank and outer wall can be cleaned with warm water and neutral detergent.
11. When cleaning the inner tank, do not use a steel wire brush or similar hard or sharp washing towel to wipe the inner wall.
12. If there is dirt or rust spots on the outer wall, you can wipe it back and forth with paper gauze according to the grain direction.
13. Note that if the outer wall is mirror-finished, the third item is invalid. Clean it according to the first item.
14. Do not place milk, yogurt, juice, carbonated drinks, traditional Chinese medicine, etc. in the thermos cup.
15. Do not use a thermos cup directly to make tea.
Insulation cup quality identification method
1. Simple identification method for insulation performance: Pour boiling water into the thermos cup and tighten the cork or lid clockwise After 2-3 minutes, touch the outer surface of the cup body with your hands. If the cup body has obvious warming phenomenon, it means that the product has lost the vacuum degree and cannot achieve a good heat preservation effect.
2. Sealing performance identification method: after adding water to the cup, tighten the cork and cup cover clockwise, and place the cup flat on the table, there should be no water leakage; Twisting should be flexible with no gaps.
3. Recognition method of plastic parts: The characteristics of food-grade new plastics are small smell, bright surface, no burrs, long service life and not easy to age. Ordinary plastics or recycled plastics are characterized by strong odor, dark color, many burrs, and plastics are easy to age and break.
4. Simple capacity identification method: the depth of the liner is basically the same as the height of the shell, and the capacity (with a difference of 16-18mm) is consistent with the nominal value. Some poor quality thermos cups add sand and cement blocks to the cup to make up for the missing weight. Myth: A heavier cup (pot) is not necessarily better.
5. Simple identification method of stainless steel materials: There are many specifications of stainless steel materials, of which 18/8 means that the composition of this stainless steel material contains 18% chromium and 8% nickel. The materials that meet this standard are in line with the national food grade The standard is a green and environmentally friendly product, which is rust-proof and corrosion-resistant. The color of the ordinary stainless steel cup is whitish and dark. If it is soaked in salt water with a concentration of 1% for 24 hours, rust spots will occur. Some of the elements contained in it exceed the standard, which directly endangers human health.
How to identify the quality of thermos cups
The quality of thermos cups on the market varies, how should ordinary consumers identify them? Industry insiders suggest that we should focus on the thermal insulation performance of the liner structure, the degree of sealing between the lid and the bottle body, and whether the material releases harmful substances, etc., which can be identified through four methods.
Shoot One
Identification of the thermal insulation of the inner liner This is the main technical indicator of the thermos cup. After filling with boiling water, tighten the cork clockwise or After 2~3 minutes, touch the outer surface and lower part of the cup body with your hands. If you find that the body and the upper part of the cup body are obviously warm, it means that the inner tank has lost the vacuum degree and cannot achieve a good thermal insulation effect.
Trick II
Identify the sealing performance Fill a glass of water and invert it for four or five minutes, screw the lid tightly, and place the glass flat on the table, or Shake it hard for a few times, if there is no leakage, it means that the sealing performance is good; in addition, it is necessary to check whether the screwing of the cup lid and the cup mouth is flexible and whether there is a gap.
Three tricks
Environmental protection of accessories Identification The environmental protection of plastic accessories is also a matter of concern. It can be identified by smell. If the cup is made of Food-grade plastics have less odor, bright surface, no burrs, long service life and not easy to age; ordinary plastics or recycled plastics have strong odor, dark color, many burrs, and plastics are easy to age and break.
Skill Four
There are many specifications for stainless steel material identification. Among them, 18/8 means that this stainless steel material contains 18% chromium and 8% chromium. Nickel, the material that meets this standard, meets the national food-grade standard and is a green and environmentally friendly product, and the product is rust-proof and corrosion-resistant. If the cup body is made of ordinary stainless steel cup, the color is white and dark, and if it is soaked in salt water with a concentration of 1% for 24 hours, rust spots will appear, which means that some elements contained in it exceed the standard, which will directly harm the human body. healthy.
