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Comparison of advantages and disadvantages
1. Simple identification method for heat preservation performance: Pour boiling water into the thermos cup and turn the cork or lid clockwise for 2-3 minutes, then touch the outer surface of the cup body with your hand. If the cup body has obvious warming phenomenon, the product is already If the vacuum degree is lost, a good heat preservation effect cannot be achieved.
2. Sealing performance identification method: After adding water to the cup, tighten the cork and lid in a clockwise direction, place the cup flat on the table, and there should be no water leakage; the screwing of the lid and the mouth of the cup should be flexible and there is no gap .
3. Plastic parts identification method: The characteristics of new food-grade plastics are small smell, bright surface, no burrs, long service life and not easy to aging. Ordinary plastics or recycled plastics are characterized by big smell, dark color, many burrs, and plastics are easy to age and break easily.
4. Simple identification method of capacity: The depth of the inner tank is basically the same as the height of the outer shell, and the capacity (with a difference of 16-18MM) is consistent with the nominal value. Some low-quality vacuum flasks add sand and cement blocks to the cup to make up for the missing weight. Misunderstanding: A heavier cup (pot) is not necessarily good.
5. Simple identification method for stainless steel vacuum flask: 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 material that meets this standard is a green product that meets the national food-grade standard. The product is rust-proof and corrosion-resistant. The color of the ordinary stainless steel cup is whitish and dark. If it is soaked in 1% salt water for 24 hours, it will produce rust spots. Some of the elements contained in it exceed the standard, which directly endangers the health of the human body.
Four ways to identify the pros and cons of a vacuum flask
The quality of thermos cups on the market varies from good to bad. How should ordinary consumers distinguish it? Industry insiders suggest that attention should be paid to the thermal insulation performance of the inner tank structure, the degree of sealing between the cup cover and the bottle body, and whether the material releases harmful substances, etc., which can be identified by four methods.
Remedy 1: Identification of the insulation of the inner tank. This is the main technical indicator of the vacuum flask. After filling with boiling water, turn the bottle stopper or lid clockwise and touch the surface and lower part of the cup with your hands after 2 to 3 minutes. The cup body and the cup body have obvious warming phenomenon, which means that the inner tank has lost its vacuum degree and cannot achieve a good heat preservation effect.
Remedy 2: Identify the sealing performance. Fill a glass of water upside down for four or five minutes, tighten the lid, place the cup flat on the table, or shake it a few times. If there is no leakage, it means that the sealing performance is good; Check whether the screwing between the lid and the mouth of the cup is flexible and whether there is a gap.
Trick 3: Identifying the environmental protection of accessories The environmental protection of plastic accessories is also a problem worthy of attention. It can be identified by smelling. If the cup is made of food-grade plastic, the smell is small, the surface is bright, there is no burr, and the service life is long. Aging; ordinary plastics or recycled plastics have a big smell, dark color, many burrs, and plastics are easy to age and easily break.
Trick 4: Identification of stainless steel materials. There are many specifications of stainless steel materials. 18/8 means that the composition of this stainless steel material contains 18% chromium and 8% nickel. Rust and corrosion resistant. If the cup body is made of ordinary stainless steel cup, the color is white and dark. If it is soaked in 1% salt water for 24 hours, it will produce rust spots. It is said that some of the elements contained in it exceed the standard, which will directly harm the human body. healthy.
