When we choose plastic packaging barrels, we must first […]
When we choose plastic packaging barrels, we must first prepare for the purchase, that is, have a certain understanding of plastics of various materials. If we have a rough understanding of various molding methods, then we must not only Judging the adaptability from the appearance of plastic packaging barrels, we must grasp the different characteristics of each material.
①Polycarbonate blow molding bottles and ordinary polyester stretch blow molding bottles both have extremely good transparency and gloss, and are very similar in appearance. Poor performance; while ordinary polyester stretch blow molding bottles have good barrier properties, but poor heat resistance.
②Polyethylene packaging barrels and nylon packaging barrels. Polyethylene packaging barrels have good resistance to acids and alkalis, but they are not resistant to many organic solvents. Nylon packaging barrels are resistant to hydrocarbons and organic solvents, but have poor resistance to acids and alkalis.
③ Polyethylene bottles can contain substances such as acids and bases, but not organic solvents such as benzene and toluene. Nylon packaging drums are not suitable for storing substances such as acids and bases, but are used for organic materials such as benzene and xylene Solvents are very suitable.
Because the plastic packaging barrels are almost identical in appearance, even the experts in the packaging barrels can hardly separate them from each other in appearance, but the performance differences between the two packaging barrels are indeed very large, especially for The barrier properties of oxygen, carbon dioxide, nitrogen and organic solvents can differ by dozens or even hundreds of times.