国产热热热精品,亚洲视频久久】日韩,三级婷婷在线久久,99人妻精品视频,精品九热人人肉肉在线,AV东京热一区二区,91po在线视频观看,久久激情宗合,青青草黄色手机视频

The properties and characteristics of a particular member of the plastics family, PET (polyethylene terephthalate), causes carbonated drinks to bubble more in plastic cups.

PET, a clear, strongpolymer, hasunsurpassedgas and moisture barrier properties. Its ability to contain carbon dioxide makes it the plastic, and the material of choice for carbonated beverage containers.

PET containers have no competition in retaining carbon dioxide, the gas responsible for theeffervescent, bubbling effect. The property that gives rise to a vast number of bubbles is the unique barrier layers, which prevent the loss of carbonation. The barrier layers serve to keep the container airtight, which keeps the carbon dioxide from leaking out, and oxygen from entering. This is why containers made from PET plastic keep carbonated beverages colder, more flavorful, andfizzier.