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Plastic bucket in the injection molding process, temperature control is very important for everyone today Xiaobian to introduce the knowledge about it in terms of temperature control:
First is the case, in the injection molding process including the need to control the temperature of the cylinder temperature, nozzle temperature and mold temperature in these three areas. Then, the cylinder temperature and nozzle temperature is mainly affecting plasticization and liquidity; and the die temperature are mainly affecting plastic flow and cooling, and the intrinsic properties of products and apparent quality greatly affected. It then again, the nozzle temperature is usually slightly lower than the highest temperature of the cylinder; and a mold temperature is decided whether the plastic crystalline, size and structure of products, performance requirements.
Shandong, the main raw material to produce plastic barrels plastic barrels polyethylene (Polyethylene, PE), referred to as PE, is the addition polymerization of ethylene polymer compounds. Polyethylene is recognized as the world's best materials in contact with food, non-toxic, tasteless, odorless, food packaging hygiene standards. Polyethylene film, light and transparent, with moisture, oxidation, acid and alkali, tightness in general, excellent sealing properties, known as "plastic flower" reputation, is the largest amount of plastic packaging and printing, the most important material.
PVC abbreviated PVC, the formula (CH2-CH2CL) n, is a vinyl polymer in the main category, is the world's second largest after the polyethylene plastic varieties, production in the country in plastic the first place. In the printing industry, often colored calendered PVC film and a transparent coating films produced books, folders, tickets and other cover packaging and decoration.
Shrink film (Shrinkfilm), it is in the production process is a stretched oriented by hot air or infrared radiation treatment of the thermoplastic film will shrink during use. After the heat treatment, the film will wrap the object to be packed, the contractile force reaches a maximum in the cooling phase, and long-term preservation.
Low-density polyethylene, LDPE is referred to as plastic packaging and printing industry in all countries the largest amount of variety. Specific gravity of 0.92 to 0.93, can float on water. Low crystallinity (60%), pressure 1000 ~ 3000kg / C㎡ bulk polymerization, it is also called high-pressure polyethylene. At 23 ℃, the density of about 0.92. Calendering poor for processing into tubular film blowing method. Suitable for food packaging, fiber packaging products, daily chemical products packaging. Biodegradable plastic bags logo
High density polyethylene, referred to HDPE. A density of 0.941 ~ 0.965g / cc. Low-pressure polymerization, it is also known low-pressure polyethylene. Milky white, indicating poor luster. Available blown film processing method and T-die extrusion process. Heat resistant to cooking, freezing cold resistant, moisture-proof, anti-air, isolated performance, not easily damaged, twice the strength of LDPE. Easy opening. Quasi paper is strong, as "quasi paper plastic film."
Biaxially oriented polypropylene film, also known as biaxially oriented polypropylene film, the English abbreviation code BOPP, which is characterized by a tensile molecular orientation, mechanical strength, folding strength, gas density, moisture barrier properties than ordinary plastic film. Compared to the unit area and cellophane, priced at less than cellophane. Since this film is excellent in transparency, in India after exceptionally bright and beautiful color reproduction is an important base of plastic composite flexible packaging.
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