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PEHD500 is a specific grade of high-density polyethylene (HDPE). “PEHD” stands for high-density polyethylene (Polyethylene High Density), while “500” denotes the specific grade or model of the material, typically used to distinguish physical properties such as density and melt flow index.
PEHD (High-Density Polyethylene) is a versatile, durable thermoplastic known for its high strength-to-density ratio, excellent chemical resistance, and ease of recycling (labeled #2). It is widely used in packaging (bottles, containers), pipes, and industrial components due to its, rigidity and affordability. It resists impact, moisture, and many solvents
Material Naming and Composition
PEHD Meaning: Stands for HDPE (High-Density Polyethylene), a highly crystalline, non-polar thermoplastic resin.
500 Designation: The number “500” typically refers to the manufacturer's product grade. In relevant polyolefin product manuals, HDPE 500 corresponds to a density of approximately 0.954 g/cm³ and has specific tensile strength and elongation at break parameters.
1. PEHD is the abbreviation for high-density polyethylene.
2. The chemical name for high-density polyethylene is high-density polyethylene.
3. The English name for high-density polyethylene is High Density Polyethylene, abbreviated as HDPE.
4. High-density polyethylene is defined as a type of polyethylene in which the main chain contains only a few side chains per 1,000 carbon atoms on average, and its density typically ranges from 0.946 to 0.976 g/cm³.
Key Properties and Characteristics of PEHD
1.Strength & Density: High strength-to-density ratio; dense, rigid, and opaque.
2.Chemical/Weather Resistance: Highly resistant to many solvents, corrosion, mildew, and insects.
3.Thermal Properties: Melting temperature of 125 to 135 °C.
4.Limitations: Hard to glue (requires welding) and can be sensitive to stress cracking.
Main Physical and Chemical Properties
Basic Properties: It appears milky white in its natural state and is translucent when cut into thin sections. It is non-toxic and odorless, with a density typically ranging from 0.941 to 0.960 g/cm³.
3 Encyclopedia
Resistance Properties: It exhibits excellent chemical resistance (resistant to most acids, alkalis, and salts), good resistance to water vapor, and maintains impact resistance even at low temperatures of -40°C.
Mechanical Properties: Its hardness, tensile strength, and rigidity are superior to those of low-density polyethylene (LDPE), and it offers excellent abrasion resistance and electrical insulation properties.
Common Applications
Industrial Manufacturing: Commonly used in the production of pipes (such as municipal water supply and drainage pipes), sheets, films, and packaging containers.
Everyday Items: Suitable for the production of wide-mouth bottles, storage bins, hollow products, and wire and cable sheathing, among others.
Common Uses
Packaging: Milk jugs, detergent bottles, shampoo bottles, and butter tubs.
Industrial/Construction: Water and gas pipelines, chemical tanks, and plastic lumber.
Consumer Goods: Outdoor furniture, toys, and cutting boards.
Manufacturing
PEHD is manufactured from petroleum and created by the catalytic polymerization of ethylene, typically using Ziegler–Natta catalysts, resulting in a low-branching molecular structure that gives it high tensile strength
Recycling
It is one of the most easily recycled plastics, frequently turned into non-food containers, decking, and bottles, reducing plastic production energy by up to 50%
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