The commonly used soft drink bottle structure is stable, and even if the high temperature in summer causes slight softening of the bottle, it will not cause any changes in the bottle structure. Experiments have shown that no harmful substances were detected in the three common brands of mineral water tested under high temperature conditions, and the state, color, taste, odor, etc. of the mineral water did not change.

Many people usually prepare a few bottles of mineral water or drinks in the car for easy access when thirsty. However, observant consumers have found that some bottles may become soft under light and high temperature conditions, and many people are concerned about whether harmful substances may seep out.

The reporter noticed that there are similar rumors online, claiming that the mineral water exposed to sunlight is toxic. Due to the presence of bisphenol A in the bottle material, which may cause chronic poisoning in the human body, high temperatures can release it along with other chemical components and penetrate into the water.

What is the truth? Is bottled water still safe after exposure to sunlight? Regarding this, Zhong Huaining, director of the National Key Laboratory for Food Contact Material Testing (Guangdong), stated that currently about 70% of soft drink bottles in the market are made of polyethylene terephthalate (PET) material. The material has a stable structure, with a glass transition temperature between 67 ° C and 81 ° C and a melting point of around 260 ° C. Even if the high temperature inside the car during summer causes the bottle to slightly soften, it will not cause any changes in the bottle structure.

Regarding the rumors about the harm of bisphenol A, Ruan Guangfeng, Deputy Director of Kexin Food and Health Information Exchange Center, stated that disposable mineral water bottles and beverage bottles do not need to use bisphenol A. Furthermore, there is no indication that bisphenol A is genotoxic or carcinogenic. The European Food Safety Authority has assessed that the daily tolerable intake of bisphenol A is 0.05 milligrams per kilogram of body weight. The relevant agencies in the United States have also conducted a data review and examination, and they believe that there is currently no direct evidence to suggest that bisphenol A will cause harm to the health of infants and young children, so there is no need to worry too much.

The Shanghai Municipal Consumer Protection Commission recently conducted experiments on the potential harmful substances produced by sun exposure in mineral water. The experiment showed that no harmful substances were detected in the three common brands of mineral water tested under high temperature conditions, and the state, color, taste, odor, etc. of the mineral water did not change.

The reporter also noticed that the bottom of bottled food purchased by consumers on a daily basis is often labeled with different numerical codes. According to the data, this number is an internationally recognized plastic classification, with the first digit being polyethylene terephthalate (PET) material, commonly used for packaging products such as mineral water and beverages; The number 2 represents high-density polyethylene (HDPE), which can be used to produce plastic bottles, corrosion-resistant pipes, geomembranes, and plastic wood; The number 3 is polyvinyl chloride (PVC), commonly used in the production of general plastic pipes; The number 4 represents low-density polyethylene (LDPE), which can be used in the manufacturing of food preservation bags, etc; The number 5 represents polypropylene (PP), which, due to its heat-resistant properties, can be used to make appliances that can be heated in a microwave oven; The number 6 is polystyrene (PS), which can be used to make fast food boxes, cup lids for milk tea, etc; The number 7 represents polycarbonate (PC) and other types of plastics, commonly used for making water bottles, baby bottles, suitcases, etc.

In daily life, when using plastic products, it is best to understand the product characteristics and precautions in advance. For example, when using microwave heating to heat food, attention should be paid to the types and timing of plastics that can be used for heating, "suggested Ruan Guangfeng.