Comments on the packaging market of heat resistant PET bottles
Heat resistant PET bottle packaging is welcomed by consumers because of its high transparency, strong gas resistance and easy to carry. It has become a popular packaging product in the international beverage packaging market in recent years with great development potential. In 1997, Japan's Suntory company took the lead in introducing the tea beverage packaged with heat-resistant PET bottles in the Chinese market by using the bottle blowing equipment of Japan's nisin company. It succeeded in the Shanghai market with one stroke and obtained considerable economic benefits. In 1998, uni President Group and * new group introduced Taiwan technology and launched their own heat-resistant pet packaged tea drinks, which were welcomed by consumers in the domestic market, making tea drinks a black horse in the beverage market in a very short time.
PET bottle of tea drinks is unique
PET bottled tea beverage can be divided into three ways: heat-resistant PET bottle hot filling technology, PET bottle quasi high temperature filling technology and PET bottle aseptic filling technology. The hot filling technology of heat-resistant PET bottles is based on the commercialization of heat-resistant PET bottles. The temperature of 85 ℃ ~ 95 ℃ is used for filling, and then the side bottles are sterilized for 30 ~ 45 seconds to achieve the purpose of fresh-keeping. The technology has been widely used in the production of tea drinks and fruit juice drinks in Japan, Taiwan and other countries and regions. The main characteristics of PET bottle filling equipment and its filling environment are relatively loose sanitary requirements, and the process technology is easy to master and operate.
As the hot filling of tea beverage, PET bottle needs to bear the hot filling temperature of 85 ℃ ~ 95 ℃ in the process of production, so it has higher requirements for its heat resistance. However, ordinary pet has poor heat resistance. When the temperature of bottle is 60 ℃ ~ 70 ℃, the volume of bottle will shrink and the bottleneck will soften, which is an inevitable contradiction compared with the hot filling technology with the filling temperature above 85 ℃. At present, only Japan nisin, France Sidel, Germany krvppcorpoplast and a few other companies have developed injection drawing and blow molding equipment for producing heat-resistant PET bottles, which is expensive in equipment cost and high in packaging cost. The price of 500ml and 32g heat-resistant PET bottles is about 1.1 yuan / bottle, while the price of ordinary 32g PET bottles is about 0.4 yuan / bottle, which has become one of the obstacles to the popularization of heat-resistant PET bottle filling technology.
Quasi hot filling technology is based on the temperature tolerance limit of ordinary PET bottles. Through the matching filling production line, the requirements of filling environment and follow-up process, the purpose of tea beverage preservation is achieved without adding any preservatives. In 1998, Jiangsu Meixing Shunfeng Machinery Co., Ltd. developed the second generation of filling technology of PET bottles for tea drinks - quasi hot filling technology. Through production practice, it has been shown that the health indicators of tea drinks produced by non heat resistant PET bottles have reached the health technical indicators of heat resistant PET bottles and the relevant national standards. As the process still has a certain filling temperature, in the selection and design of bottle type, it is required that the bottle weight is more than 33g, and the corresponding reinforcing rib is designed to resist the stress change of PET bottle caused by hot filling and cooling. The market price of PET bottle packaging with this technology can be reduced to 0.40-0.45 yuan / bottle.
PET bottle aseptic filling technology is the development trend of beverage packaging technology. The matching filling equipment has become the core content of the industrialization of the technology. At present, only a few enterprises in Germany, Italy and other countries have developed pet bottle aseptic filling machine. In Taipei, uni president successfully filled a series of low acid tea drinks with a new aseptic PET plastic filling machine developed by Tetra Pak. This is the first rfa-40 machine used for packaging low acid drinks.
The packaging material used in aseptic filling technology of PET bottles can not only use ordinary PET bottles, but also can reduce the bottle weight to less than 21g because it does not need to resist the stress change of PET bottles caused by hot filling and cooling, so the bottle price can be reduced to about 0.25 yuan / bottle, and the bottle samples can be selected in a variety of ways, and the product packaging cost can be reduced, so that the enterprise can occupy a seat in the fierce competition of beverage market. To create the first opportunity.