• head_banner_01
  • News

How to choose stainless steel insulation cup

We will introduce them one by one from the aspects of material, thermal insulation performance, airtightness and brand, method of cup lid, capacity, etc.:

Material: 316 stainless steel, 304 stainless steel, and 201 stainless steel are the most commonly heard.
As we all know, stainless steel is the abbreviation of stainless acid-resistant steel. It is resistant to weak corrosive media such as air, steam, water, or has stainless steel grades, such as 201 (1Cr17Mn6Ni5N), 202 and other 2 series steel grades; and chemical corrosion resistance Steel grades corroded by medium (acid, alkali, salt, etc.) become acid-resistant steel grades, such as 3 series steel grades such as 304 (06Cr19Ni10), 316 (0Cr17Ni12Mo2). Due to the difference in chemical composition between the two, their corrosion resistance is different. Like 2 series stainless steel, they are not resistant to chemical medium corrosion, while 3 series stainless steel has the ability to resist chemical medium corrosion. Therefore, when choosing a thermos cup, don’t choose the material of 201, it cannot be used as tableware; instead, you should choose 304 and 316 stainless steel. The common labeling methods on the market include chemical formula (06Cr19Ni10) and SUS (SUS304), among which 06Cr19Ni10 generally means national standard production, 304 generally means American ASTM standard production, and SUS 304 means Japanese standard production. There is another kind of stainless steel called austenitic stainless steel. Is it a new stainless steel?

Of course not, stainless steel is divided into austenite and martensite. Common austenitic stainless steels are SUS316, SUS304, SUS303, etc. Common stainless steels in martensite include SUS440C, SUS410, etc. 304 stainless steel is a kind of austenitic stainless steel, which is a common material in stainless steel, with a density of 7.93 g/cm³; it is also called 18/8 stainless steel in the industry, which means it contains more than 18% chromium and more than 8% nickel; With high temperature resistance of 800℃, it has the characteristics of good processing performance and high toughness, and is widely used in industry, furniture decoration industry and food and medical industry. However, it should be noted that food-grade 304 stainless steel has stricter content indicators than ordinary 304 stainless steel. For example: the international definition of 304 stainless steel is that it mainly contains 18%-20% chromium and 8%-10% nickel, but food-grade 304 stainless steel contains 18% chromium and 8% nickel, which allows fluctuations within a certain range, and Limit the content of various heavy metals. In other words, 304 stainless steel is not necessarily food grade 304 stainless steel.

Therefore, when purchasing, be sure to see clearly whether there is a shield-shaped steel stamp of “SUS304″ on the inner wall of the thermos cup (all domestic brands have it), and whether there is a clear indication on the outer box of the product that “SUS304″ is used 304# (or 316#) edible stainless steel base material”, “executive standard: GB4806.9-2016″, the words marked with this information are reliable.

However, I want to explain that for the thermos cups of brands such as Tiger, Zojirushi, Thermos, and Peacock, there is no SUS304 shield-shaped stamp on the inner wall, but they will mark the material on the outer box: austenitic stainless steel 06Cr19Ni10 (SUS304) , Executive standard: GB/T 29606.2013 “Stainless Steel Vacuum Cup” national standard, GB 4806.7.2016 “Food Safety National Standard Food Contact Plastic Materials and Products”, GB 4806.9.2016 “Food Safety National Standard Food Contact Metal Materials and Products”, GB 4806.11.2016 “National Food Safety Standard Food Contact Rubber Materials and Products”, the first item is the national standard for stainless steel vacuum cups, and the last three items are for thermos cup accessories, such as cup lids and handles. Standard, so, be sure to see the purchase.

Insulation performance: It is divided into heat preservation and cold preservation effects. The heat preservation effect is divided into 1 hour, above 86 degrees, 6 hours, above 68 degrees, and ice preservation effect for 6 hours below 8 degrees. This index is also related to the temperature of the room temperature and the capacity of the thermos cup. The larger the capacity, the lower the degree of heat preservation, and the higher the degree of ice preservation. This value is not absolute. Products of various brands will fluctuate up and down on this degree. It is based on the parameters of specific products. This is just a reference value. .

Tightness: After the thermos cup is filled with liquid, tighten the lid and turn it upside down to see if there is any liquid seeping out, so as to check the sealing performance of the thermos cup.

Brands: Thermos, Tiger, Zojirushi, Lock&Lock, Supor, Fuguang, etc.; these are the top few. Thermos, Tiger and Zojirushi are all foreign brands, domestically produced, and the price is relatively high. Among them, there is an anti-stick coating on the inside of the Zojirushi thermos cup: polytetrafluoroethylene. For those who don’t like the coating, you can buy it carefully; Tiger and Zojirushi Thermos mugs are all uncoated inside. The inner wall of the Tiger thermos is bright metallic, while the inner wall of the Thermos is matte metallic. You can choose according to your preference; Lock & Lock was originally used as a crisper, and the thermos was made later Its main features are pure color, multi-color, and multi-capacity. The student party and young people buy more. Supor is a pot maker. Later, it developed small appliances, cups, pots, etc., which are mainly sold in supermarkets and online. And like our MINJUE is also an old-fashioned thermos cup manufacturer in China. There are many types, price ranges, and guaranteed quality. You can buy according to your preferences. Whether you are an old man, a young man or a student, you can choose a satisfactory cup in our factory.

Cup lid opening method: Let me talk about the opening method of the thermos cup lid, there are knob type and pop-up type, the knob type is to unscrew the cup lid when drinking water, and remove the drinking water; the bouncing type is to press the knob After that, you can drink water when the lid pops up, which is suitable for people who need one-handed operation such as sports and driving. Pop-up lids are generally not as easy to clean as knob-type lids.

Vacuum cup capacity: 350ml, 480ml, 500ml are the conventional capacity, women usually choose 350ml, men generally choose 480ml, often go out, if you like small size, you can choose 200ml or 250ml, children’s water bottle is recommended to choose 600ml The larger capacity of milliliters is better.

The above is MINJUE’s experience in selecting stainless steel vacuum flasks for everyone. If you have any questions, please contact us online or by email!

Post time: Nov-21-2022