Water cups are the containers we use daily to hold liquids. They are usually shaped like a cylinder with a height greater than its width, so that it is easier to hold and retain the temperature of the liquid. There are also water cups in square and other shapes. Some water cups also have handles, handles, or additional functional structures such as anti-scalding and heat preservation.
Water cups are the containers we use daily to hold liquids. They are usually shaped like a cylinder with a height greater than its width, so that it is easier to hold and retain the temperature of the liquid. There are also water cups in square and other shapes. Some water cups also have handles, handles, or additional functional structures such as anti-scalding and heat preservation.
When purchasing drinks, you will find that there is a circular triangle symbol and a number on the bottom of each bottle. So how to interpret the meaning of the recycling triangle symbols and numbers on the bottom of plastic bottles?
“Triangle” is the plastic recycling symbol. my country uses the triangle symbol as the plastic recycling symbol
What do the numbers inside the triangle at the bottom of the plastic cup mean?
This is the environmental recycling symbol of plastic. PC is the abbreviation of polycarbonate, and 7 means it is not a common plastic. Since polycarbonate does not fall into the above material range of 1-6, the number marked in the middle of the triangle of the recycling sign is 7. At the same time, in order to facilitate sorting during recycling, the material name PC is marked next to the recycling sign.
1. “No. 1″ PETE: mineral water bottles, carbonated drink bottles, and beverage bottles should not be recycled to hold hot water. Usage: Heat-resistant to 70°C. It is only suitable for holding warm or frozen drinks. It will be easily deformed when filled with high-temperature liquids or heated, and substances harmful to the human body may melt out. Moreover, scientists found that after 10 months of use, Plastic No. 1 may release the carcinogen DEHP, which is toxic to the testicles.
2. “No. 2″ HDPE: cleaning supplies and bath products. It is recommended not to recycle if the cleaning is not thorough. Usage: They can be reused after careful cleaning, but these containers are usually difficult to clean and can retain the original cleaning supplies and become a breeding ground for bacteria. It is best not to reuse them.
3. “No. 3″ PVC: Currently rarely used for food packaging, it is best not to buy it.
4. “No. 4″ LDPE: cling film, plastic film, etc. Do not wrap the cling film on the surface of food and put it in the microwave oven. Usage: The heat resistance is not strong. Generally, qualified PE cling film will melt when the temperature exceeds 110°C, leaving some plastic preparations that cannot be decomposed by the human body. Moreover, when food is wrapped in plastic wrap and heated, the fat in the food can easily dissolve harmful substances in the plastic wrap. Therefore, before food is put into the microwave oven, the plastic wrap must be removed first.
6. “No. 6″ PS: Use bowls for instant noodle boxes or fast food boxes. Do not use microwave ovens to cook bowls for instant noodles. Usage: It is heat-resistant and cold-resistant, but cannot be placed in a microwave oven to avoid releasing chemicals due to excessive temperature. And it cannot be used to hold strong acids (such as orange juice) or strong alkaline substances, because it will decompose polystyrene that is not good for the human body and can easily cause cancer. Therefore, you want to avoid packing hot food in snack boxes.
7. “No. 7″ PC: Other categories: kettles, cups, baby bottles
What material is the safest for plastic water cups?
No. 5 PP polypropylene plastic water cup safety
Commonly used are soy milk bottles, yogurt bottles, juice drink bottles, and microwave lunch boxes. With a melting point as high as 167°C, it is the only plastic box that can be placed in a microwave oven and can be reused after careful cleaning.
It should be noted that for some microwave lunch boxes, the box body is made of No. 5 PP, but the lid is made of No. 1 PE. Since PE cannot withstand high temperatures, it cannot be put into the microwave oven together with the box body. Pay special attention to transparent PP, which is not microwave PP, so the products made of it cannot be placed directly in the microwave oven.
If you often drink hot water, you can choose PPSU at the high end. PA12, which is commonly used at temperatures above 120 degrees, has strong aging resistance. The lower end is PP, which can withstand temperatures above 100 degrees. However, the common temperature is around 80 degrees, which is easy to age and is cheap. The mid-range is the temperature-resistant grade PCTG, which has high strength and better temperature resistance than PP. If you only drink cold water, PC is more cost-effective, but hot water will easily release BPA.
Cups made of PP have good heat resistance, with a melting point of 170℃~172℃, and relatively stable chemical properties. In addition to being corroded by concentrated sulfuric acid and concentrated nitric acid, they are relatively stable to various other chemical reagents. But the problem with regular plastic cups is widespread. Plastic is a polymer chemical material. When a plastic cup is used to fill hot water or boiling water, the polymer will easily precipitate and dissolve into the water, which will be harmful to human health after drinking.
Nowadays, the country has very strict food safety monitoring, so the plastic cups sold on the market are basically safe. You can also look at the logo. There is a logo on the bottom of the plastic cup, which is the number on the small triangle. The most common one is “05″ , indicating that the material of the cup is PP (polypropylene). If you find it too troublesome, you can also buy branded ones, such as Tupperware, which are not afraid of falling and have good sealing.
Theoretically, as long as bisphenol A is 100% converted into a plastic structure during the production of PC, it means that the product does not contain bisphenol A at all, let alone releases it. However, if a small amount of bisphenol A is not converted into the plastic structure of PC, it may be released and enter food or drinks. Therefore, be careful when using this plastic container. The higher the temperature, the more bisphenol A remains in PC will be released, and the faster it will be released. Therefore, PC water bottles should not be used to hold hot water.
Drinking water from 3 cups may cause cancer
1. Disposable paper cups may contain potential carcinogens
Disposable paper cups only look hygienic and convenient. In fact, the product qualification rate cannot be judged. Whether they are clean and hygienic cannot be identified with the naked eye. From an environmental perspective, disposable paper cups should be used as little as possible. Some paper cup manufacturers add a large amount of fluorescent whitening agents to make the cups look whiter. It is this fluorescent substance that can mutate cells and become a potential carcinogen once it enters the human body. Secondly, those unqualified paper cups generally have soft bodies and are easily deformed after water is poured into them. Some paper cups have poor sealing properties. , the bottom of the cup is prone to water seepage, which can easily cause hot water to burn your hands; what’s more, when you gently touch the inside of the paper cup with your hand, you can feel that there is fine powder on it, and the touch of your fingers will also turn white , this is a typical inferior paper cup.
2. Metal water cups will dissolve when drinking coffee.
Metal cups, such as stainless steel, are more expensive than ceramic cups. The metal elements contained in the composition of enamel cups are usually relatively stable, but they may dissolve in an acidic environment, making them unsafe for drinking acidic drinks such as coffee and orange juice.
3. Plastic water cups are most likely to harbor dirt and evil people and practices
2. Metal water cups will dissolve when drinking coffee.
Metal cups, such as stainless steel, are more expensive than ceramic cups. The metal elements contained in the composition of enamel cups are usually relatively stable, but they may dissolve in an acidic environment, making them unsafe for drinking acidic drinks such as coffee and orange juice.
3. Plastic water cups are most likely to harbor dirt and evil people and practices
Although glass cups do not contain chemical substances and are easy to clean, because the glass material has strong thermal conductivity, it is easy for users to accidentally burn themselves. If the water temperature is too high, it may cause the cup to burst, so try to avoid holding hot water.
2. Unglazed and dyed ceramic cups
The first choice for drinking water is a ceramic cup with no color glaze and dyeing, especially the inner wall should be colorless. Not only is the material safe, it can withstand high temperatures, and it also has a relatively good thermal insulation effect. It is a good choice for drinking hot water or tea. Therefore, for the sake of health, you should choose the right water cup to drink water. Be careful of the water cup causing disease hazards.
Warm reminder
It is best if the cup can be cleaned immediately after each use. If it is too troublesome, it should be cleaned at least once a day. You can wash it before going to bed at night and then dry it. When cleaning the cup, you should not only clean the mouth of the cup, but also the bottom and wall of the cup. Especially the bottom of the cup, which is not cleaned frequently, may accumulate a lot of bacteria and impurities.
Female friends are especially reminded that lipstick not only contains chemical ingredients, but also easily absorbs harmful substances and pathogens in the air. When drinking water, harmful substances will be brought into the body, so the lipstick remaining at the mouth of the cup must be cleaned. When cleaning the cup, simply rinsing it with water is not enough, it is better to brush it with a brush.
In addition, since the important component of dishwashing liquid is chemical synthesis, it should be used with caution and rinse with clean water. To clean a cup that’s stained with a lot of grease, dirt, or tea stain, squeeze some toothpaste onto a brush and rub it back and forth inside the cup. Since the toothpaste contains both detergent and extremely fine friction agent, it is easy to wipe off the residual material without damaging the cup body.
Cups are affected by static electricity from computers, chassis, etc., and will absorb more dust, bacteria, and germs, which will affect your health over time. For this reason, experts suggest that it is best to put a lid on the cup and keep it away from computers and other electrical appliances. You should also maintain indoor air circulation and open windows for ventilation to let the dust go away with the wind.
Post time: Aug-09-2024