Plastic packaging material characteristics

1. Composite Substrate - Rapid Development of Biaxially Stretched Films

The development of biaxially oriented films such as BOPP and BOPET has not yet cooled. In 1999, a number of projects were completed and put into production. Newly built BOPP units include Zhejiang Dadongnan, Guangdong Zhanjiang Packaging Co., Ltd., Shanghai Jinpu Plastic Packaging Materials Co., Ltd., Jiangyin Shenlong Group Co., Ltd., and Yunnan Cigarette Factory BOPP Film Co., Ltd. Along with the original production line, there are 54 BOPP companies that have been introduced, with a total of 70 production lines, of which 35 are imported from Bruckner, which accounts for 54%. The total production capacity is 400,000 tons, and the output in 1999 was 300,000 tons. In 1998, BOPET was also a hot topic of development.

New technologies include Shandong Weifang Xinlike Plastics Co., Ltd. and Ningbo Wuzhou Company. Together with the original BOPET, there are already 15 lines with a total production capacity of 100,000 tons, and the output is expected to be 50,000 tons.

It can thus be seen that the momentum of repeated construction has not been reduced, and it has developed to a very serious level. The competition within the industry is fierce and the price war is more prominent. BOPP film prices have fallen, the market has begun to show signs of weakness, old companies have seen a decline in profits, new companies have been unable to repay loans, and biaxially stretched films have developed rapidly, from strong demand to market saturation. The situation of declining benefits is worthy of careful consideration by relevant companies.

2, the composite film occupied the food packaging market, the benefits are obvious

In the plastics industry facing a weak market and slow sales of products, plastic packaging materials are still developing at a rapid rate. The reason is the development of the domestic market, the continuous harvest of agriculture, the need for packaging films for rural products processing, fruits and vegetables need Fresh-keeping film, several million tons of food and food, small foods, local flavor foods, sugar, salt, and aquatic products all require packaging films.

According to the survey, in recent years, it has used more than 1 million tons of various types of food packaging films each year, accounting for more than 50% of the plastic packaging materials, especially the rise of supermarkets in large and medium-sized cities, bringing new opportunities to the plastic packaging industry. The market demand for freeze-to-eat pasta, quick-frozen vegetables, and quick-frozen aquatic products has increased, thereby facilitating the adjustment of product structure and the development of new process technologies and new products.

Multi-layer co-extruded composite films have been produced in large quantities in Suzhou, Hangzhou, Shanghai, Fuzhou, Luxi, Henan, Dezhou, and Guangzhou, and have achieved significant economic benefits. In particular, the successful development of sterile film packaging bags in Xinjiang, Xi’an, and other places further improved the packaging of tomato sauce, dairy products, aquatic products, condiments, cosmetics, pharmaceutical products, fruit juices, vegetables, and juice drinks. Has very obvious economic benefits.

3, hollow containers to the development of specialized applications

With the development of China's market economy, the product structure of hollow containers has undergone great changes, and the development of small, hollow containers has become more diverse, diversified, and specialized. Pharmaceutical plastic packaging containers use HDPE bottles has reached 1 billion, with the elimination of aluminum-tin hose packaging, multi-layer coextrusion plastic hose has been widely used in ointment packaging, used in cosmetics and toothpaste packaging is also a general trend.

In particular, the PET bottle beverage packaging continued to grow, so that the packaging container market has become active, and the vast market of mineral water and juice beverages has promoted the rapid development of PET bottles. According to investigations, more than 50 PET bottle production lines have been introduced in the PET bottle industry, and more than 80 domestically produced equipment have been used. The total production capacity has exceeded 150,000 tons/year (450 million). The output of 1998 has reached 4 billion. The significant increase over 1998 is mainly due to the rapid development of the beverage and drinking water market and the progress of PET bottle recycling technology. PET bottles have occupied the market with their excellent performance.

With the development of injection blowing technology, PET bottles have made great progress in heat resistance and barrier properties, plus their advantages in impact resistance, light weight, and beautiful appearance, attracting beverage manufacturers. Actively used as a new packaging container, at present, in order to adapt to the sterilizing technology of tea beverages, it is necessary to use hot cans, new high-temperature resistant polyester bottles, related companies have been under development, will soon come out, this is the development of hollow containers New trends.

In terms of large-scale packaging containers, there is also a vast market for the packaging of various chemical liquids and petroleum products. The plastic sealing barrel is a new type of packaging container, which is made of HDPE dense barrels manufactured by Changzhou. It is suitable for coatings, chemical additives, food additives, pigments, dyes and other packaging.

In order to meet the needs of large-scale packaging, rolling plastic packaging containers have been steadily developed over the past year. Large vessels, yachts, and sampans with a capacity of 500-2000 litres or more have successively been established in Liaoning Fushun, Dalian, Yantai, Chengde, Jiangsu Dongtai, and Zhengzhou. Hunan, Fuzhou, Shunde and other places went into production. With the development of the drinking water market, the demand for polycarbonate water bottles has increased significantly. A joint venture between Bayer and the Shanghai company to build a PC plant with an annual capacity of 40,000 tons is in progress.

4, the heat shrinkable packaging film to the multi-functional development

In the past two years, the development and production of heat-shrinkable packaging films have been rapidly developed in the past 96 years and have been widely used in various fields of packaging. It is expanding from a single PVC to a variety of shrink films such as PE, PP, PVDC, PFT, and PA. With the continuous development of the market economy, the packaging market has also put forward higher and newer requirements. Heat-shrinkable packaging is adapting to the needs of economic development. It has developed to high levels and versatility, and many new products have emerged. Such as:

(1) A heat-receiving film with an embossed pattern, in which one layer is stretched and one layer is not stretched. When heat shrinks, one layer shrinks, the other layer does not shrink, or the shrinkage rate of the composite film of two different materials is different. Thus forming an embossed pattern;

(2) double-layer heat shrinkable film, with PP as the foamed layer, a small mesh structure on the layer, and a heat shrinkable layer on the other layer, generally LDPE;

(3) Multi-layer composite heat-shrinkable packaging film, which improves barrier properties, automatically seals by heat shrinkage and adhesion of inner and outer films, and is used for packaging of fresh meat and poultry.

5, rapid development of stretch winding packaging film

Wrapping film is also called elastic film or wrap film. It is self-adhesive and does not require heat shrinking during packaging. It is beneficial to energy conservation, packaging cost, and ease of containerization, improving the efficiency of logistics, that is, the combination of pallets and forklifts. The “collective loading and unloading” method has reduced the transportation cost; in recent years, the winding film has developed rapidly, and the product has developed from a single-layer film of LDPE, EVA, PVC, LLOPE to a multilayer co-extruded film, and the stretching rate has increased to 200. -300%, with good packaging effect.