[China Glass Network] With the changes in the diet structure and cooking style of consumers in China, the number of consumers using glassware and cooking utensils is increasing rapidly. There have been some problems with it, and the accidental purchase of misuse of glass bursts has been happening.
More types of glassware
Glass products have the advantages of transparency, easy cleaning, sturdiness and good corrosion resistance. They are increasingly used as daily necessities and food containers, and have been favored by consumers. With the advancement of glass making technology and technology, the types and application scope of glass products are becoming wider and wider. At present, the glassware that consumers often encounter in home life mainly has three categories: ordinary glass, tempered glass and heat-resistant glass.
Most consumers know ordinary glass, can not be used in high temperature heating (oven, microwave oven) environment, but many consumers do not understand the difference between tempered glass and heat-resistant glass, mistakenly use tempered glass containers for cooking purposes, and even Caused an incident of injury after the tempered glassware burst. Tempered glass is an improved product that is improved by tempering of ordinary soda lime glass to improve mechanical shock resistance, and its thermal shock resistance is limited.
Most of the heat-resistant glass belongs to the borosilicate glass series, and also includes varieties such as glass-ceramics. Because of different chemical compositions, the structure is also different from ordinary glass or tempered glass. Borosilicate glass has a small coefficient of thermal expansion, good resistance to high temperature and temperature, rapid cooling and rapid changes. It is suitable for use as a food processing container in the kitchen and can be directly used in microwave ovens and ovens. Kitchen heat-resistant glass products mainly include heat-resistant tableware, heat-resistant crisperware and cooking utensils, which can be divided into open fire and dark fire.
How to choose heat resistant glass
At present, the labeling of heat-resistant glass products on the market is not clear. Some operators also intend to confuse the concept, and expand the functions of ordinary tempered glass and even ordinary glass, making it extremely easy for consumers to buy and misuse.
Heat-resistant glass products should be marked with corresponding indications, indicating the temperature of use, the scope of use, etc. Consumers should pay attention to the above information when purchasing and using. At present, among the heat-resistant glass, borosilicate glass is mostly used, and the heat resistance of the glass ceramic is better. The heat-resistant glass product is obtained by annealing and cooling, has good thermal stability, high heat-resistant temperature, high production difficulty, and high manufacturing cost. Consumers who consider the use of nominally heat-resistant glass at a low price are considered for their authenticity.
In addition, glass cookware (tableware) production and management companies are also obliged to make clear the product material, the use environment and safety precautions. It is also necessary for the corresponding appliance manufacturing enterprises such as ovens and microwave ovens to indicate the specific functional requirements and scope of use of the matching heating containers in the instruction manual. Catering companies should also provide consumers with glassware that meets safety requirements.
Know more about it - the reason for the tempered glass
The reason why tempered glass is easy to bleed is because during the manufacturing process, it often becomes a mixture of nickel sulphide that cannot be found by the naked eye. This kind of nickel sulphide will cause the tempered glass to not match the glass under the change of ambient temperature. Larger expansion, that is, breaking the balance between many stresses inside the glass, the glass may crack, causing the phenomenon of glass self-explosive flying.
The flat-plate tempered glass has strong mechanical impact resistance, but after the tempering treatment of the shaped vessels such as cookware (tableware), the self-explosion rate is high and the safety is poor due to the complicated shape and uneven stress during external heating. Although it is possible to increase the process of "homogeneous" treatment of tempered glass and reduce the self-explosion rate, the current "homogeneous" treatment of tempered glass is mainly used in industrial fields, such as automobile glass, building doors and windows, furniture accessories, and the like.
Some countries in the United States, Japan, and Europe started using glassware as the main kitchen utensils very early. The problem has arisen more and earlier. To this end, some countries have introduced regulations on the production, classification and use of glassware, and clearly defined what is heat-resistant glass and its key performance parameters.
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