Plastic casing is a kind of casing with good barrier and high temperature cooking and sterilization. The packaging materials used for plastic casing include polyvinylidene chloride (PVDC), polyamide casing film (PA) and eval composite flexible packaging materials. Since PVDC has a small amount of products in Nantong resin factory in China, PVDC casing film needs to be purchased from abroad from raw materials to equipment. PVDC is a heat sensitive plastic with narrow processing temperature and easy decomposition, so the molding equipment has special requirements.

Plastic casing film packaging materials have developed rapidly in recent years. They are mainly used for meat packaging, including polyvinylidene chloride (PVDC) casing, nylon casing, nylon composite casing and eval composite casing. It is widely used in packaging sausage, ham sausage, red sausage, pink sausage, sandwich sausage, garlic sausage, minced sausage and so on. [1]

PVDC

Polyvinylidene chloride (PVDC) casing

Properties and Applications

Polyvinylidene chloride (PVDC) blown film is a kind of packaging material with high barrier. It has the characteristics of low air permeability and moisture permeability, excellent oil and chemical resistance and good aroma retention. It is widely used in the packaging of food, drugs, electronics and instruments. [1]

Research progress abroad

The output of PVDC resin in Japan was 250t in 1954, 10000 t in 1960 and 180000 t in 2000. Although PVDC has many advantages, its processing conditions are harsh. Only a few countries in the world have processing capacity. It is a high-tech in the plastic processing industry. The world famous PVDC blown film manufacturer and trade name are as follows: Dow Chemical Company of the United States, trade name saran; W.it.grace company of the United States, trade name gryovay: Asahi Dow Ltd. of Japan, now renam