China's polyester containers are currently limited to biaxially stretched polyester blow bottles. China's biaxially stretched polyester blow-molded bottles started late in the plastic packaging industry, but they have achieved good results in beverage packaging represented by Coke since the introduction of the injection-pulled PET bottle production line in Japan in the 1980s. Subsequently, a large number of foreign advanced injection blow PET bottle production equipments were introduced. At the same time, on the basis of digesting foreign advanced technologies, a two-step PET stretch blow molding machine with independent intellectual property rights and suitable for China’s national conditions was developed. , It is used in conjunction with a universal injection machine and uses a PET preform made by a universal injection machine to blow PET biaxially stretched bottles. In the domestically produced two-step biaxially stretched PET blow molding machine, some models can not only produce ordinary PET biaxially stretched bottles, but also heat-resistant biaxially stretched PET bottles. The volume of products that can be produced basically covers Imported equipment can produce vast areas ranging from tens of milliliters of vials to 5 gallons of vats. These simple blowing machines not only have the advantages of low cost and strong mobility, but also can produce bidirectional PET blow-molded bottles with good quality and good practicality. Therefore, they have been widely recognized by the plastic processing industry at home and abroad. In addition to a large number of domestic use, it has been partially exported for export. Although there is still a gap between these equipments and imported advanced equipment that has low production efficiency, poor automation, and poor product dimensional accuracy, for some of the most demanding applications (such as Coca Cola and Pepsi Cola products), There are still some difficulties in application. In addition, the production equipment for multi-layer co-blow PET bottles has yet to be developed in China, but the development and utilization of domestic two-step PET bottles have played a significant role in promoting the rapid development of PET bottles. . At present, China's PET bottle manufacturers have the most advanced automatic PET bottle production lines manufactured by well-known companies in the world (such as Japan's ASB, Qingmugu's full-automatic PET bottle production line, France's SEDEL's automatic PET bottle The large-scale backbone enterprises of the production line and the full-scale PET bottle production line of Italy's SIPA Company also have a large number of small and medium-sized enterprises that have adopted various self-designed and manufactured simple, practical two-way PET blowers of different degrees of automation. Unprecedented flourishing and prosperous scenes. At present, in China's PET bottle production industry, Zhuhai Zhongfu and Shanghai Zijiang Group, the backbone enterprises with the largest output, account for approximately 30% and 20% of the domestic PET bottle market share, respectively. Zhuhai Zhongfu Group is the earliest domestic manufacturer of PET bottles approved by Coca-Cola and PepsiCo. In 2001, the group produced 3.2 billion PET bottles, of which 700 million were hot-filled, and sales reached 2.34 billion yuan. Home factory. Shanghai Zijiang Group has also developed rapidly in recent years. The number of holding companies in each region has grown to 15, occupying markets in Wuhan, Zhengzhou, Tianjin, Changchun, Kunshan, and Chengdu, and the newly-built annual output of 120 million PET heat. Filling bottles have been put into production. In 2002, they invested in factories in Shanghai, Guangzhou, Chengdu, and Beijing, and the production capacity of hot-fill bottles reached 485 million. With the rapid development of PET bottles, the production of bottle-grade PET resin in China has also been rapidly developed. According to reports, in 1995, the use of bottle-grade PET resin in China was 100,000 tons, of which domestic production was 60,000 tons. By 2000, the use of bottle-grade PET resin in China was 520,000 tons, and the domestic production capacity had reached 500,000 tons. In addition to the rapid increase in volume, the quality has also been greatly improved. Bottle grade PET resins produced by Yizheng Chemical Fiber, Shanghai Far East, and Changzhou Huayuan have all been approved by Coca-Cola Company. The domestic mainstream PET bottle products were initially limited to packaging containers for beverages such as cola, mineral water, and distilled water, and were widely used by users for their excellent performance and reasonable price. These beverage packaging applications were successfully applied. Based on the above, PET bottles have been expanded in recent years in applications such as heat-resistant bottled beverages such as black tea, green tea, fruit juice, edible oil, cosmetics, pharmaceuticals, and pesticides. According to reports, the output of PET bottles in China was 3 billion in 1996, 5 billion in 1998, 8 billion in 2000, 9 billion in 2001, 10 billion in 2002, and 13 billion in 2004. The largest increase in plastic packaging materials. Especially since 2001, with the sudden emergence of the domestic tea beverage market (the tea beverage output reached 3 million tons in 2001), the PET bottle hot-filled at 85°C to 90°C for tea beverages has become the fastest growing polyester bottle in recent years. The variety. At the same time, the trend of aseptic cold filling in PET bottles has risen in Japan and other countries, and it is worthy of attention. A large number of applications of aseptic cold irrigation technology for PET bottles will reduce the importance of hot-fill PET bottles and increase the proportion of non-heat-resistant PET bottles in the production of PET bottles. Previously mentioned non-carbonated beverage juice, vegetable juice, various flavors of tea beverages, dairy products, coffee and so on, the traditional filling methods are using hot filling technology, but this technology requires a higher PET bottle (must use resistance High-temperature PET hot-filling bottles) It is reported that aseptic cold filling technology is used in one-third of non-carbonated drinks in Japan, and it can be considered as one of the trends of beverage development in the future. Aseptic cold filling and hot filling are compared as follows. The main advantages of aseptic cold filling can be listed as: better maintain the original flavor of the beverage, the taste of the beverage is good; the cost is low, mainly in the asepsis cold filling requirements of the PET bottle is low; safety is good, Aseptic cold filling, if problems occur, are in batches, easy for production companies to inspect and follow (hot filling problems are mostly random, difficult to check and manage); cold filling bottles allow companies to freely design Bottle type, play the imagination space, enhance the company's brand image and product competitiveness. The insufficiency of aseptic cold filling is that the investment in equipment is large at one time and the requirements for production management (workshop hygiene, etc.) are high. Although the aseptic cold filling line is relatively expensive and the one-time investment is relatively large, it is difficult for the general small and medium-sized enterprises to bear, but its comprehensive efficiency is better than hot filling. This is why it has a strong vitality. The application of PET bottles in beer packaging is a common concern in countries all over the world in recent years. China is a big producer of beer. Since 2000, beer production has exceeded 20 million tons, ranking second in the world. Calculating at 20 million tons, it requires 250 to 30 billion bottles each year, which provides a broad development for PET PET bottles. space. However, beer is different from ordinary carbonated beverages. The requirements for packaging containers are much higher. Even a trace amount of oxygen enters the packaging container, the taste of beer will change, and the loss of CO2 in beer will significantly affect the foam of beer. Characteristics, therefore, to meet the requirements of freshness and shelf life, high barrier properties are required. At the same time, since 95% of the beer in China is produced by pasteurization, the bottle is required to be resistant to sterilization at 62°C to 67°C. Zhuhai Zhongfu Group and Shanghai Zijiang Group all invested a lot of money and actively adopted new technologies to research and develop PET beer bottles. They adopt the co-injection technology and stretch blow-molding process, and the PET beer bottles developed have achieved relatively good results. The research and development of PET bottles will enable beer to reach a preservation period of 100 days. Zhuhai Zhongfu Group analyzed the cost of PET beer bottles from the aspects of packaging fees, transportation fees, and bottle washing costs, and concluded that the cost of PET bottles and glass bottles is close. Although the price of the 330mL PET bottle is 15.29% higher than that of the glass bottle, the operating cost is lower by 10.65% (reduced cost is reduced by 10.65%). The same cost is calculated on the basis of the single-use bottle as the basis of cost calculation, the total cost only increases by 4.64%, and the beer manufacturer only A small amount of investment is required to retrofit existing equipment to use PET bottles on existing glass bottles to achieve the dual purpose of the production line: it can be used to fill glass bottles and also to replace parts. For filling PET beer bottles. The author believes that PET beer bottles have a huge potential market and deserve the attention of peers. For those companies with sufficient human and material resources, they can be involved in the research and development of beer bottles in a timely manner. However, as mentioned above, in terms of the industrialization of PET beer bottles, although a great deal of work has been carried out abroad and practical results have been achieved, none of the beer bottles produced by that technology have been completely Satisfactory technical and economic indicators are still in the small-scale trial period. It is necessary to do a lot of in-depth and meticulous work to truly complete the conversion of beer bottles from glass bottles to plastic bottles. At the same time, we should clearly understand that PET beer bottles are only a commodity—a component of beer rather than a complete product. Therefore, only the enthusiasm of plastic processing companies is not enough. The development of PET beer bottles must compete for beer. The active participation and strong support of the production companies will lead to less effective efforts and will make it difficult to complete the development and application of PET beer bottles. For small and medium-sized enterprises with limited manpower and material resources, instead of investing large amounts of manpower and resources in the research and development of PET beer bottles, it is better to invest limited human and material resources in packaging PET containers for daily chemicals, medicine, food, and condiments. Research and development to achieve better actual benefits. Pp Forks,Plastic Pp Forks,Polypropylene Fork,Disposable Pp Forks Anhui Jianfeng Environmental Protection Technology Co., Ltd , https://www.ahbiocutleries.com
In the polyester packaging container, another product that deserves high attention in the industry is the previously mentioned APET sheet thermoforming container. It has the advantages of less investment, difficult process, excellent product performance, low price and wide application. It has a huge space for development, and it should increase the development of APET thermoforming containers.