Nantong Keyster Thermal Insulation Products Co., Ltd.

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How to choose a good thermal insulation lunch box

2023-04-11
1. Simple identification method of thermal insulation performance
Pour boiling water into the thermos cup and tighten the cork or lid clockwise for 2-3 minutes, then touch the outer surface of the cup body with your hands. The product has lost the vacuum degree and cannot achieve a good thermal insulation effect, and the lower part of the thermal insulation cup is always cool. Misunderstanding: Some people use their ears to hear whether there is a sizzling sound to determine their thermal insulation performance, but their ears cannot hear whether there is a vacuum.
2. Sealing performance identification method
After adding water to the cup (pot), tighten the cork or lid in a clockwise direction, place the cup (pot) flat on the table, and there should be no water seepage; the cup (pot) lid and the cup mouth should be screwed in and out Flexible and no gaps. Fill a full glass of water and turn it upside down for four or five minutes, or shake it vigorously a few times to check for leaks.
3. Identification method of plastic parts
Food-grade new plastic features: small smell, bright surface, no burr, long service life and not easy to age. The characteristics of ordinary plastics or recycled plastics: strong odor, dark color, many burrs, and plastics are easy to age and break. This will not only affect the service life, but also affect the hygiene of drinking water.
4. Simple capacity identification method
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 in line with the nominal value. In order to cut corners and make up for the missing weight of materials, some Chinese brands add sand and cement blocks to the cup (pot). 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 this stainless steel material contains 18% chromium and 8% nickel. The materials that meet this standard meet the national food-grade standard and are green and environmentally friendly products, and the products are rust-proof and corrosion-resistant. Ordinary stainless steel cups (pots) are whitish or dark in color. If they are soaked in salt water with a concentration of 1% for 24 hours, rust spots will occur. Some of the elements contained in them exceed the standard, which directly endangers human health.


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