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Difference of raw materials for rotational molding products

2020-10-27 14:06:40
Times

Rotational molding material is also a small market, but with the progress of I industry in recent years and the rapid progress of molecular material science and technology, a revolutionary wave of replacing steel with plastic gradually rises. Many industries have steel to plastic products gradually, and the raw materials of plastics are constantly upgrading. What are the raw materials for rotational molding industry


1. Low density polyethylene (LDPE), density 0.910 ~ 0.925g/cm2, melting point 107

Its products have the advantages of low density, good transparency and good insulation. They are mainly used for Dao agricultural film (shed film, mulch film), heavy packaging film, shrink film, transparent film, insulating material and so on

The production of cable sheath can also be used in injection molding, extrusion, foaming and other processing fields.

Rotational molding mold

2. LLDPE: relative density 0.918 -- 0.939. The melting point is 121, and the physical and chemical properties of the product are: non-toxic, tasteless and odorless milky white particles. Compared with LDPE, it has the advantages of high strength, good toughness, strong rigidity, heat resistance, cold resistance, etc. it also has good environmental stress cracking resistance, tear resistance and other properties, and can be resistant to acid, alkali, organic solvents, etc. It is suitable for film blowing, film pressing and bottle blowing. Low strength, good toughness and high ductility. The excellent environmental stress cracking resistance, low temperature impact resistance and warpage resistance make LLDPE attractive for tube, sheet extrusion and all molding applications. LLDPE is a new type of application, which is used as the liner of waste residue landfill and waste liquid pool.


3. Density of high density polyethylene (HDPE) is 0.941 ~ 0.965g/cm2. Melting point is 135.1. The physical and chemical properties of the product are: non-toxic, odorless, odorless white particles. It has good acid and alkali resistance, organic solvent resistance, excellent electrical insulation. It can still maintain certain toughness, heat resistance and cold resistance at low temperature. It has good chemical stability, high rigidity and toughness, good mechanical strength, dielectric property and environmental stress cracking resistance. High density PE material: used for product processing, extrusion products and plates, with high strength. Commonly used in: slide, incubator, military case, collision bucket, sewage lifter shell, sweeper shell, electric car shell, etc. Surface hardness, tensile strength, rigidity and other mechanical strength are higher than LDPE



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