How to detect whether plastic cups are toxic?

How to detect whether plastic cups are toxic?

How to detect whether plastic cups are toxic? Plasticizers are often added to plastics because they contain some toxic chemicals. When hot water or boiled water is filled in plastic cups, toxic chemicals are easily diluted into water. Let's see how to detect whether plastic cups are poisonous.

How to detect whether a plastic cup is toxic 1 Plastic lunch boxes and cups are made of "edible plastics". There is usually a triangle at the bottom of a lunch box or cup, and there are numbers in the triangle. Such plastics are "edible plastics". This triangle symbol is like the ID card of each plastic container, which represents different materials according to the numbers:

1.No. 1: made of polyethylene terephthalate (PETE), with heat resistance of 65℃ and cold resistance of -20℃. Common in mineral water bottles and beverage bottles.

2. Number 2: It is made of high density polyethylene (HDPE), and it is recommended not to recycle it. , common in shopping bags and food bags.

No.3.3 and No.4: The materials are PVC and low density polyethylene, which have weak heat resistance and are often used for plastic wrap.

Fourth, the number 5: the material is polypropylene, which is commonly used in microwave lunch boxes and plastic cups. High temperature resistance 120℃.

5. Number 6: The material is polystyrene, which is heat-resistant and cold-resistant, but it can't be put in the microwave oven. Common in disposable cups.

Sixth, the number 7: PC other categories: kettle, cup, bottle.

Generally, when buying a lunch box or a cup, the number in the triangle below should be exactly one of 5, 6 and 7, which is non-toxic and safe, with a high degree of safety.

How to detect whether plastic cups are toxic? Is the plastic cup poisonous?

Although the plastic cups sold by regular manufacturers are non-toxic, because the plasticizer composed of chemical components is added in the production process, long-term use will be harmful to the human body, so it is generally recommended that you use glasses, which will be safer.

How do you know if the plastic cup is poisonous?

Although most plastic cups sold in the market are food-grade plastics, many of them are toxic. The method of judging whether plastic cups are toxic is simple, just according to the triangle on the goods: there are more than 100 kinds of recyclable plastics. This triangle symbol is like the ID card of each plastic container, indicating that they are made of different materials and can be recycled.

What are the disadvantages of drinking water from plastic cups?

Ordinary plastic cups have not been treated by high temperature process. Dissolved in hot water, it releases organic solvents produced by polyethylene and other chemicals. Long-term use is easy to cause dizziness, nausea, vomiting, and even cancer, causing harm to the human body.

If the plastic cup is not heated, will bisphenol A be released into water?

First of all, if it is a PC product (such as beverage bottles, drinking buckets, baby tableware, sports equipment, medical equipment, CDs or electrical appliances, etc. ), BPA can be released at room temperature, but the release speed can be accelerated by 40-50 times at high temperature; Secondly, the transdermal absorption rate of BPA is also high.

High-grade plastic cups or bottles, made of PPSU and PP, is there a problem?

Unlike PC, these three kinds of water cups definitely do not contain BPA. However, whether it contains BPS and other substitutes, manufacturers generally do not specifically mark it.

How to detect whether plastic cups are toxic? 3. Is the plastic cup poisonous?

Plasticizers are often added to plastics because they contain some toxic chemicals. When hot water or boiled water is filled in plastic cups, toxic chemicals are easily diluted into water. There are many pores in the internal microstructure of plastic, which contain dirt. If it is not cleaned properly, bacteria can easily breed. Therefore, when purchasing plastic cups, you must choose food-grade plastic cups that meet the national standards.

How to identify the safety of plastic cups?

The safety of plastic cups depends on raw materials.

Plastics belong to polymer chemical materials. When hot water or boiled water is filled in plastic cups, polymers can easily precipitate and dissolve in water, which is harmful to human health after drinking. Moreover, there are many pores in the internal microstructure of plastic, which contain dirt, and improper cleaning will breed bacteria. Therefore, the choice of plastic cups is very important for the choice of plastic materials, and food-grade plastics that meet national standards must be selected.

Generally, the bottom of a plastic cup (bottle) will have a triangular recycling logo with an arrow. Through the numbers on this logo, we can know what material the cup is made of. If you don't have this triangle, it is not up to standard. Whether it is poisonous or not, it is best not to buy it.

"1"-pet (polyethylene terephthalate)

More common in mineral water bottles and beverage bottles. This material is heat-resistant to 70℃, can be filled with normal temperature water in a short time, and should not be mixed with acid-base drinks or high-temperature liquids, nor should it be exposed to the sun, otherwise it will produce toxic substances harmful to human body.

"2"-HDPE (high density polyethylene)

Cleaning products and bath products are not thoroughly cleaned. It is not recommended to recycle them. It can be reused after careful cleaning, but these containers are usually not easy to clean, leaving the original cleaning supplies and becoming a hotbed of bacteria. You'd better not recycle them

"3"-PVC (polyvinyl chloride)

At present, it is rarely used in food packaging, so it is best not to buy it. This material is easy to produce harmful substances at high temperature, and even it will be released during the manufacturing process. After food enters the human body, it may cause diseases such as breast cancer and birth defects of newborns. At present, containers made of this material are rarely used for packaging food. If it is in use, don't let it get hot.

"4"-LDPE (low density polyethylene, high pressure polyethylene)

Plastic wrap, plastic film and other plastic wrap are not wrapped on the surface of food and put into the microwave oven. Because the heat resistance of LDPE is not strong, under normal circumstances, qualified PE cling film will melt when the temperature exceeds 1 10℃, leaving some plastic preparations that cannot be decomposed by human body. Moreover, food is wrapped and heated with plastic wrap, and the oil in food can easily dissolve the harmful substances in plastic wrap. Therefore, before putting food into the microwave oven, you must first remove the wrapped plastic wrap.

"5" PP (polypropylene)

PP plastic water cup is made of polypropylene, which has good thermal stability and thermal insulation, and is safe and harmless to human body. The product can be sterilized at the temperature above 100℃, and will not deform at 150℃ without external force, and there is no pressure when filling with boiling water.

6-polystyrene

Plastic cups made of ps are particularly brittle and resistant to low temperature, and cannot be used in high temperature, strong acid and strong alkali environments.

"7"-As (acrylonitrile-styrene resin), PC materials and others.

Used in pots, cups, milk bottles, etc. High safety, fall resistance, but not high temperature resistance. Drinking cold water is harmless, but if you drink hot water, it will produce harmful substances after heating. Therefore, everyone must pay more attention when using it as a plastic cup.

"8 inch" PC (polycarbonate)

Commonly used in kettles, space cups, baby bottles, department stores often use water cups made of this material as gifts. But cups made of this material are generally not resistant to high temperature. If heated or in an acidic or alkaline environment, it is easy to release the toxic substance bisphenol A(BPA), so do not use it for hot water, and it is best to clean it with warm water.

There is a lot of knowledge on it. Although I know something after reading it, I still don't know which plastic cup is poisonous. To do this, you only need to look at the picture below.