Polyvinylidene chloride (PVDC) has excellent barrier properties. my country’s high-end demand relies on imports.

Vinylidene chloride, also known as 1,1-dichloroethylene, has the chemical formula C2H2Cl2. It appears as a colorless liquid and is insoluble in water. It has poor solubility in solvents and is difficult to process, making it difficult to apply commercially. In order to solve the problems of poor solubility and difficult processing, vinylidene chloride is usually copolymerized with a small amount of other monomers. The monomers used generally include vinyl chloride, acrylonitrile, etc. The polymerization methods include emulsion polymerization, suspension polymerization, etc. , this type of vinylidene chloride copolymer is polyvinylidene chloride.

The suspension polymerization method is currently the mainstream production process of polyvinylidene chloride. It mixes vinylidene chloride monomer, comonomer, and initiator, adds a dispersant for polymerization, and then adds a second initiator for polymerization. After separation and purification, the finished product is obtained, which has the advantages of stable reaction, high product quality, and low additive residue.

According to the “Polyvinylidene Chloride (PVDC) Industry In-depth Market Research and Investment Strategy Suggestions Report 2022-2026” released by the Industrial Research Center shows that polyvinylidene chloride can produce liquid resin, films, fibers, sheets, pipes, molded parts and other products. Polyvinylidene chloride film is mainly used as packaging materials and can be used in the packaging fields of medicines, food, beverages, meat products, chemicals, and electronic products; polyvinylidene chloride fiber can be used to make fishing nets, artificial turf, and in the textile field, synthetic The fibers are called polyvinyl chloride and saron; polyvinylidene chloride solution can be used in paints, coatings, adhesives and other fields.

Because polyvinylidene chloride has good barrier properties, it can block oxygen and water vapor at the same time, and has significant moisture-proof and anti-oxidation effects. Therefore, it is widely used in pharmaceutical packaging and food packaging. In the pharmaceutical field, polyvinylidene chloride can be used in the packaging of granules, powders, capsules, etc., as well as in the field of medical device packaging; in the food field, polyvinylidene chloride has good antiseptic and preservation effects, and can be used as packaging for fresh food and meat products. Extended shelf life.

In the overseas market, the main manufacturers of polyvinylidene chloride include Dow of the United States, Solvay of Belgium, Asahi Kasei of Japan, Kureha Chemical of Japan, etc.; in the Chinese market, the main manufacturers of polyvinylidene chloride include Zhejiang Juhua, Nantong Huiyufeng, Quzhou Jusu Chemical, etc. In addition, meat product manufacturers such as Henan Shuanghui have also invested in polyvinylidene chloride production capacity to provide packaging materials for their ham sausage products.

Industry analysts said that after continuous development, my country’s polyvinylidene chloride production technology has matured and its production capacity has continued to expand, which can basically meet domestic needs. Market demand, but high-end production capacity is limited. As my country’s demand for high-end polyvinylidene chloride continues to grow, my country’s polyvinylidene chloride imports are on the rise. In April 2017, the Ministry of Commerce issued an announcement to impose anti-dumping duties on imported vinylidene chloride-vinyl chloride copolymer resin originating in Japan. In April 2022, it launched an end-of-term review investigation into this anti-dumping measure. The government has given development protection to my country’s polyvinylidene chloride industry in terms of policies. my country’s polyvinylidene chloride industry itself also needs to continuously improve its core competitiveness to achieve import substitution in the high-end market.