Cling film is a kind of plastic packaging product, usually made of ethylene as a masterbatch by polymerization. Wrap film can be divided into three categories: the first one is polyethylene, referred to as PE; the second is polyvinyl chloride, referred to as PVC The third type is polyvinylidene chloride, referred to as PVDC.

Microwave food heating, refrigerator food preservation, fresh food and cooked food packaging are widely used in family life, supermarkets, hotels, restaurants and industrial food packaging.

Introduction

Most of the plastic wrap and commonly used plastic bags sold on the market are made of ethylene.

The masterbatch is a raw material, and according to different types of vinyl masterbatch, wrap film can be divided into three categories.

The first type is polyethylene, referred to as PE. This material is mainly used for food packaging. The film used for fruits and vegetables that we usually buy back, including the semi-finished products purchased from supermarkets, is made of this material;

The second type is polyvinyl chloride, abbreviated as PVC. This material can also be used for food packaging, but it has a certain impact on human safety.

The third type is polyvinylidene chloride, referred to as PVDC, which is mainly used for the packaging of some cooked food, ham and other products.

Among the three kinds of plastic wrap, the cling film of PE and PVDC is safe for the human body and can be used with confidence. The PVC wrap film contains carcinogens, which is harmful to the human body. Therefore, when purchasing wrap film, PE cling film should be used.

From a physical point of view, the wrap film has moderate oxygen permeability and moisture permeability, regulates the content of oxygen and moisture around the preserved product, and blocks dust, thereby prolonging the shelf life of the food. Therefore, it is necessary to use different cling film for different foods.

The plastic wrap on the market is roughly divided into two categories, one is the ordinary wrap film, which is suitable for refrigerator preservation; the other is the microwave wrap film, which can be used for both refrigerator fresh-keeping and microwave ovens. The latter plastic wrap is far superior to ordinary cling film in terms of heat resistance and non-toxicity. Therefore, consumers should pay special attention to the choice of use, and use it separately.