co-extruded PET and barrier resin blow molding. At present, foreign manufacturers have been industrial large number of this method is usually 3 or 5 layers, the inner and outer layers of PET,
The middle layer is a barrier layer.
The advantages of this technology is the process is mature, the middle layer selection of high permeability materials, can significantly improve the resistance of the bottle wall, but also by adding oxygen and anti-UV absorber, significantly reduce the total beer capacity Oxygen and UV light transmittance, can hold the shelf beer shelf shelf life. According to the requirements of customers and the amount of high barrier material and the adjustment of the formula to improve to 3 months to 1 year. In addition, the bottle can be used to seal the crown cap, the original glass filling line can be a little modified after filling and sealing, the total cost and glass bottles close. In this process, the choice of intermediate barrier material is the key to improve the barrier properties of the material. Peter / PET In the latest industrialization results, the United States Amoco company began to develop and produce a transparent copolyester Amosorb 3000 material, which is characterized by its permanent bonding with O2, when the O2 through the bottle wall and cap penetration When the bottle can block O2. Japan's Mitsui Chemicals has also carried out the industrial scale production of mixed BA-030 copolyester material, and for the five-story structure of the beer bottle, the structure level: PET outer layer, BA-030/02 oxygen layer, ultraviolet Barrier layer, PET inner layer. When BA-030 is compounded with PET, its performance is even better than PEN. The United States NANOCOR company and Japan's Mitsubishi Gas Chemical Company to develop a new type of nylon MXD6 nanocomposite (M9), than the MXD6 oxygen barrier and anti-carbon dioxide loss were increased by 50% and 70%, while the same transparency and anti-stripping , With its development of PET / M9 / PET three-tier structure of the beer bottle can reach the United States (110 days), Europe (180 days) on the beer retention period requirements. And the thickness of the M9 layer is thinner than the MXD6 layer, thus reducing the cost. Holwer developed a nylon 6 nanocomposite "Aegis" and added AegisOX Oxygen Oxygenator with a oxygen permeability of 100 times lower than that of nylon 6, as a three-layer PET bottle as a barrier, Its permeability can be compared with other existing bottlenecks beer bottles, even glass bottles quite. In the multi-layer composite technology in recent years deserves special attention is the use of nanocomposites as barrier layer and the introduction of oxygen absorber activity blocking technology.