Shaanxi plastic bucket manufacturer Blow molding hollow plastic containers are made of low-pressure high-density polyethylene, namely HDPE, high-density polyethylene (HDPE), which is a kind of high crystallinity, non-polar thermoplastic resin. The original HDPE has a milky white appearance and a certain degree of translucency in the flakes. PE has excellent resistance to most household and industrial chemicals.

Some kinds of chemicals can cause chemical corrosion, such as corrosive oxidants (concentrated nitric acid), aromatics (xylene) and halogenated hydrocarbons (carbon tetrachloride). The polymer is non hygroscopic and has good water vapor resistance. It can be used for packaging. HDPE has good electrical properties, especially high insulation dielectric strength, and is very suitable for wires and cables. Even at room temperature of - 40F, the medium high molecular weight grade also has excellent impact resistance. The unique characteristics of different grades of HDPE are an appropriate combination of four basic variables: density, molecular weight, molecular weight distribution and additives. Different catalysts are used to produce customized polymers with special properties. Combine these variables to produce HDPE grades for different purposes; Achieve a good balance in performance. Xi'an plastic bucket HDPE is a non-toxic, tasteless and tasteless white particle with a melting point of about 130 ℃ and a relative density of 0.941~0.960. It has good heat resistance and cold resistance, good chemical stability, high rigidity and toughness, and good mechanical strength. The dielectric properties and resistance to environmental stress cracking are also very good. The melting temperature is 220~260 ℃. For macromolecular materials, the recommended melting temperature range is 200~250 ℃.

According to years of production experience of Xi'an plastic barrel, a complete set of production process is summarized. production Food grade plastic bucket Its main raw material is polyethylene (PE), or PE for short. It is a high molecular organic compound formed by ethylene addition polymerization. Polyethylene is recognized as a good material in contact with food in the world. It is non-toxic, tasteless and tasteless, and meets the hygienic standards for food packaging. Polyethylene film, light and transparent, has the properties of moisture resistance, oxygen resistance, acid and alkali resistance, general air tightness, excellent heat sealing, etc. It is called the "flower of plastics". It is an important material with a large number of plastic packaging and printing.

PVC - polyvinyl chloride, abbreviated as PVC, with the molecular formula of (ch2-ch2cl) n, is the main type of vinyl polymer and the second largest plastic variety in the world after polyethylene. In the printing industry, PVC color calendering film and transparent glazing film are often used for packaging and decoration of books, folders, tickets and other covers. Shrink film Shrink film is a kind of thermoplastic food grade plastic barrel plastic film, which is stretched and oriented during production, and shrinks after hot air or infrared radiation treatment during use. After heat treatment, the film is tightly wrapped on the package, and the shrinkage force reaches a large value in the cooling stage, which can be preserved for a long time.

Xi'an plastic bucket is a commonly used transport and storage container, mainly used to contain solids. The 200L chemical plastic bucket can also be used as the packaging container for all kinds of Class 3, 8 and 9 liquid dangerous goods. It is worth noting that the 200L chemical plastic bucket will turn yellow after long-term use. Do you know what caused it? Generally speaking, yellowing of plastic products is usually caused by aging or degradation of materials. Generally, PP is caused by aging (degradation). Due to the existence of side groups on polypropylene, its stability is not good, especially in the case of light. The yellowing of 200L chemical plastic bucket is closely related to this problem. In fact, it has a lot to do with the formula of the product. To put it bluntly, the use time of 200L chemical plastic bucket is too long, and the surface of some color masterbatch is easy to oxidize. Masterbatch can be surface treated. Adding appropriate oxygen system and anti ultraviolet agent can improve yellowing of PE and PP