What are the hazards of PVC cling film?

First of all, it is the problem of PVC itself. PVC has good mechanical properties, heat resistance and flame retardancy, so it is often used in pipes, plates and other fields. Although the heat resistance is good, the chemical properties of PVC are very unstable. However, in the heated environment, although softening does not occur, a small range of depolymerization occurs, and hydrogen chloride (HCl) formed by light, oxygen and depolymerization occurs. Under the influence of the decomposition of the decomposition. We sometimes see certain PVC products that will turn yellow after a long time. This is the principle. The most typical product of depolymerization is HCl, which does cause some harm to the human body.

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Second, it is a problem with PVC plasticizers. PVC is a hard plastic. If it is applied to the field of membrane materials, it must add a large amount of plasticizer to PVC to change its "hard" characteristics, make PVC soft and strengthen the plasticity of PVC. Some of these plasticizers added to PVC are indeed in a security controversy. Among them, the most commonly used plasticizers are diisooctyl phthalate (DEHP) and diisooctyl adipate (DEHA), both of which are easily volatilized from PVC at temperatures above 60 °C. . DEHP is highly toxic and belongs to environmental hormones. Therefore, it has been banned in many countries. DEHA is relatively safe and is currently the main PVC plastic wrap plasticizer, but it cannot completely rule out no health hazards.

Therefore, PVC cling film is limited in scope of use and can only be used to wrap fruits, vegetables, eggs, and other foods that contain less oil and are not heated. For other plastic wrap, it is completely safe at low temperatures or low oil content. At high temperatures, PE cling film will decompose above 110 °C, PVDC is 125 ° C, PMP can withstand 180 ° C high temperature, and even can be used for microwave heating, they are safe plastic wrap.

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On the outer packaging of regular cling film products, the use range and temperature tolerance of such cling film products are generally marked. Consumers can pay more attention to the purchase process and choose according to their own needs. If these tips are not on the package, it is best not to buy this cling film.

If the consumer does not know whether the cling film that he is using is PVC material, there are several ways to distinguish: First, look at transparency, PVC cling film generally has better transparency, and PE cling film has no plasticizer added. Therefore, its transparency is general; second, it can be stretched, PVC cling film is more resistant to stretching and ductility, while PE cling film is not resistant to stretching, and the stretched part will be white; third, it can be burned, PVC cling film In case of fire, it will emit black smoke and produce a pungent smell, while PE plastic wrap will drip in the burning process, accompanied by the smell of candles, but the burning test is not recommended for everyone at home; the fourth is the self-adhesive ratio of PVC cling film. PE cling film is strong and easier to stick with tableware and containers.