Compared with the traditional glass beer bottles, plastic beer bottles with light weight, not broken, not easy to explode, storage and transportation costs and other obvious advantages.
The current plasticization of beer bottles has become an internationally recognized trend. Equipment suppliers from all over the world are stepping up their research and seeking breakthroughs in the development of plastic beer bottles.
With plastic bottles for beer packaging basic conditions:
1. Beer with guaranteed storage will not deteriorate within the validity period.
2. Has the cost of beer production is not higher than the original competitiveness.
3. On the original production site, little change in the production line, and transformation time is not long, it is best to be able to do one machine with dual use.
Therefore, the selection of plastic beer bottle raw materials and bottle making process are extremely important. First, the bottle must have a high barrier to gases (ie, to prevent oxygen ingress and carbon dioxide exudation) and to block ultraviolet light, preferably to absorb oxygen in the bottle. There are already manufacturers in the sealed bottle cap gaskets add oxygen materials, and even blown multi-layer bottle material in the sandwich material added oxygen. In addition, but also to make the bottle cap and bottle cap tightly closed, with the slightest leak.
 
Types of plastic beer bottles at home and abroad
1, polyethylene terephthalate (pet). At present, most of the soft drink packaging plastic is pet. Pet plastic used in the production of beer bottles, the PET gas barrier because of poor, easy to make beer discouraged and oxidative deterioration, so pure pet production of bottled beer shelf life is relatively short. Pure pet bottle abroad only for short-term storage of cheap beer. In addition, the untreated pure PET bottle temperature and scratch resistance is poor, PET bottles can not be reused after recycling, can only be recycled for other purposes.
2, pen bottle. pen bottle heat resistance, anti-UV and scratch-resistant and long after the filling of beer storage, etc. than pet bottles several times. pen has excellent heat resistance, at 80 degrees Celsius after 30-40 minutes of water spray sterilization completely no problem.
3, multi-layer composite or modified coating technology and production of plastic bottles.
At present, most of the plastic beer bottles on the foreign market are made by coating or modification as well as multi-layer compounding, and the modified plastic bottles are treated with the coating technology on the inner wall of pet plastic bottles, especially the composite multi- Plastic beer bottles, has entered the quantitative production experiment. The so-called pet multi-layer composite plastic bottles for the majority of the three-tier structure, the outer layer is pet plastic; the middle of the sandwich evoh or nano-nylon, because the pen is too expensive, so rarely used; inner is also used pet plastic. Modified plastic such as nano-pet, due to the modified pet plastic production temperature is high, easy to produce crystals, generally rarely used for blowing production.

The advantages and disadvantages of plastic bottles
1, one-step blown plastic bottles, less mechanical scars, bottlenecks and cap airtightness, air leakage rate is small, high transparency, beautiful appearance. The biggest technical problem is difficult to control bottleneck uniformity, thickness difference, prone to convex variant.
2, two-step method of blowing plastic bottles, mechanical scar more lines, slightly less transparency than the one-step method. Two-step blowing plastic bottles, preforms preform injection molding and stereotypes, and then sent to the next process for secondary heating blowing. Preform in the process of conveying the hopper and storage storage, it is inevitable mechanical trauma, as well as preform friction between each other caused preform and blank mouth damage, resulting in poor airtight cap and bottle mouth, leakage rate than the one-step method Blown high. The advantage is that the bottles blown out by the technology are tested by ultrasonic thickness gauge. The bottle walls are even, the error of thickness is small, and the convex beverage is not easy to produce after filling the beer beverage. However, the equipment invested large, high operating risk.
3, pet plastic bottles because of its plastic properties, during the filling of plastic bottles of beer and beverage, pay special attention to whether the use of lubricants line with the standard, only in line with standard lubricants can protect pet plastic bottles from chemical damage, Otherwise, the plastic bottle will likely burst or leak out of the bottle bottom during storage or transportation after it has been filled, even after packing, due to the high acid or high alkali chemical damage of the lubricating liquid. Especially in soft drinks.
4, pet plastic beer bottle cover matters needing attention. It is best to know the material of the metal cover when sealing the metal cover. For example, the aluminum metal cover is used for sealing the bottle, and the sealing and sealing tightness will not be much problem. When the closure cap is made of ferrous metal, pay particular attention to whether the cap will be released from the mechanical bounce of the metallic material after the gripper of the crown cap is pressed against the bottle. If there is a rebound from the position, the packaging sealing effect is certainly poor, but the case of light and heat encountered in the shock, under the action of external force to make it shrink or expand, will make the bottle cap and cap seal tight place to move , Resulting in air leakage.
5, plastic coating technology with good gas barrier, UV light barrier advantages, the disadvantage is impatience impact. In case of strong turbulence, it may cause physical injury to the consumer due to the separation and shedding of the coating on the liquor.
6, plastic bottles due to bottle wall thin, filling in the beer beverage, because of its firmness can not withstand the vacuum treatment, the bottle of oxygen commonly used long tube perfusion method, and add carbon dioxide gas to exclude oxygen. With plastic bottles for beer and beverage packaging, beverage filling in the need to increase with a PET plastic bottle-specific bottle-processing machine, bottle blowing machine and beverage can also be connected at the same time filling the production line. Beer beverage filling In view of the different technical requirements of plastic bottles and glass bottles, the former is hanging bottleneck air supply for the bottle, the use of most of the sealed bottle caps are two kinds of plastic and metal, Seal and fork pressure sealing method. The latter is provided by the conveyor chain and the star wheel for bottle, filling and capping by the bottle stand up, the use of the bottle cap is basically plastic and metal two, capping way for the pressure and pressure claws