The main materials of the Pail Mould are introduced as follows:
One. LDPE and its uses
LDPE (Chinese name: Low Density Polyethylene): Polyethylene with a relative density of 0.910-0.925 is called Low Density Polyethylene. Low-density polyethylene is a waxy white resin, and its structural characteristics are non-linear. The molecular weight is generally 100,000 to 500,000. It has low crystallinity and softening point, good flexibility, and elongation. Electrical insulation, transparency, and high impact resistance. Low-density polyethylene has poor mechanical strength and poor heat resistance. In addition, another obvious weakness is poor environmental stress crack resistance. Low-density polyethylene is mostly used Film products, and most of the film products are used for packaging. The other part is used as agricultural film and construction film. Low-density polyethylene packaging film can be used for food packaging such as candy, vegetables, frozen food, etc., and can also be used as an internal Lining film, shrink packaging film, elastic packaging film, heavy packaging film and other non-food packaging films.
two. HDPE and its uses
HDPE (High Density Polyethylene): Polyethylene with a density of 0.941 to 0.965 is called High Density Polyethylene. HDPE is a non-polar thermoplastic resin with high crystallinity. The appearance of the original HDPE is milky white, and the thin section is translucent to a certain extent. PE has excellent resistance to most domestic and industrial chemicals. HDPE has good electrical properties, especially the high dielectric strength of the insulation, making it very suitable for wires and cables.
Compared with low-density polyethylene, high-density polyethylene has improved heat resistance and mechanical strength (such as tensile, bending, compression and shear strength) and improved water vapor and gas barrier properties. HDPE can be extruded Process into pipes, plates, sheets, profiles and monofilament, flat yarn, packing tape; blow molding method can produce large and medium-sized hollow containers, such as bottles, barrels and large industrial storage tanks; injection molding method can produce various Parts, daily necessities and industrial supplies.
three. LLDPE and its uses
LLDPE (Chinese name: Linear Low Density Polyethylene): LLDPE (Linear Low Density Polyethylene) The linearity of LLDPE depends on the different production processes of LLDPE and LDPE. LLDPE is usually produced by copolymerization of ethylene and olefins such as butene, hexene or octene at lower temperature and pressure. The LLDPE polymer produced by the copolymerization process has a narrower molecular weight distribution than the general LDPE, and has a linear structure that makes it have different rheological properties. The melt flow characteristics of LLDPE are suitable to meet the requirements of new processes, especially the film extrusion process, which can produce high-quality LLLLDPE. It is used in polyethylene. All traditional markets have enhanced tensile, penetration, impact and resistance. The tearing property makes LLDPE suitable for film. Its excellent environmental stress cracking resistance, low temperature impact resistance and warpage resistance make LLDPE attractive for pipe, sheet extrusion and all molding applications. The new application of LLDPE is as a mulch film for waste landfill and waste liquid pool lining. Higher tensile strength, penetration resistance, tear resistance and increased elongation are the characteristics of LLDPE. The material of the Plastic Bucket Mould is the same as above.