LDPE has SPI resin ID code 4 Image File history File links Plastic resin recycle code 04. ... The Society of the Plastics Industry developed symbols for plastics so that they could be recycled easier. ... Sorted household plastic waiting to be hauled away for reprocessing. ...

Low-density polyethylene (LDPE) is a thermoplastic made from oil. It was the first grade of polyethylene, produced in 1933 by Imperial Chemical Industries (ICI) using a high pressure process via free radical polymerisation [1]. Its manufacture employs the same method today. This article or section does not cite its references or sources. ... A thermoplastic is a material that is plastic or deformable, melts to a liquid when heated and freezes to a brittle, glassy state when cooled sufficiently. ... Pumpjack pumping an oil well near Sarnia, Ontario Ignacy Łukasiewicz - inventor of the refining of kerosene from crude oil. ... Imperial Chemical Industries (ICI) is a British chemical group and one of the largest chemical producers in the world. ... In chemistry free radicals are uncharged atomic or molecular species with unpaired electrons or an otherwise open shell configuration. ... Polymerization is the formation of long, repeating organic polymer chains. ...

Properties

LDPE is defined by a density range of Q to 3 It is unreactive at room temperatures, except by strong oxidizing agents, and some solvents cause its swelling. It can withstand temperatures of 80 °C continuously and 95 °C for a short time. Made in translucent or opaque variations, it is quite flexible, and tough to the degree of being almost unbreakable. Room temperature describes a certain temperature within enclosed space that is uses for various purposes by human beings. ... For other uses, see Solvent (disambiguation). ... Edema (BE: oedema, formerly known as dropsy) is swelling of any organ or tissue due to accumulation of excess fluid. ...

It has more branching (on about 2% of the carbon atoms) than HDPE, so its intermolecular forces (instantaneous-dipole induced-dipole attraction) are weaker, its tensile strength is lower, and its resilience is higher. Also, since its molecules are less tightly packed and less crystalline because of the side branches, its density is lower. HDPE has SPI resin ID code 2 High-density polyethylene (HDPE) is a polyethylene thermoplastic made from petroleum. ... This article or section is in need of attention from an expert on the subject. ... Intermolecular forces are electromagnetic forces which act between molecules or between widely separated regions of a macromolecule. ... Tensile strength measures the force required to pull something such as rope, wire, or a structural beam to the point where it breaks. ... For the band see Resilience (band) Resilience generally means the ability to recover from (or to resist being affected by) some shock, insult, or disturbance. ... In physics, Density is defined as mass m per unit volume V. Mathematically, it is expressed as where, in SI units: ρ (rho) is the density of the substance, measured in kg m-3 m is the mass of the substance, measured in kg v is the volume of the substance...

Physical qualities

• Maximum Temperature: 176 °F (80 °C)
• Minimum Temperature: −58 °F (−50 °C)
• Autoclavable: No
• Melting Point: 248 °F (120 °C)
• Tensile Strength: 1700 psi (11.7 MPa)
• Hardness: SD55
• UV Resistance: Poor
• Translucent
• Excellent flexibility
• Density: 0.92 g/cm³

Fahrenheit is a temperature scale named after the German physicist Daniel Gabriel Fahrenheit (1686–1736), who proposed it in 1724. ... The degree Celsius (symbol: °C) is an SI derived unit of temperature. ... A pressure gauge reading in PSI (red scale) and kPa (black scale) The pound-force per square inch (symbol: lbf/in2) is a non-SI unit of pressure based on avoirdupois units. ... The megapascal, symbol MPa is an SI unit of pressure. ... Durometer is one of several ways to indicate the hardness of a material, defined as the materials resistance to permanent indentation. ... Note: Ultraviolet is also the name of a 1998 UK television miniseries about vampires. ... In optics, transparency is the property of being transparent, or allowing light to pass. ... In physics, Density is defined as mass m per unit volume V. Mathematically, it is expressed as where, in SI units: ρ (rho) is the density of the substance, measured in kg m-3 m is the mass of the substance, measured in kg v is the volume of the substance...

Chemical resistance

• Excellent resistance (no attack) to dilute and concentrated acids, alcohols, bases and esters.
• Good resistance (minor attack) to aldehydes, ketones and vegetable oils.
• Limited resistance (moderate attack suitable for short term use only) to aliphatic and aromatic hydrocarbons, mineral oils and oxidizing agents.
• Poor resistance and not recommended for use with Halogenated hydrocarbons.[2]

Acidity redirects here. ... Functional group of an alcohol molecule. ... A base in chemistry is a chemical substance which has a free pair of electrons to bind a hydrogen ion commonly referred to as a proton (IUPAC definition). ... General formula of a carboxylate ester. ... An aldehyde. ... Ketone group A ketone is either the functional group characterized by a carbonyl group linked to two other carbon atoms or a chemical compound that contains this functional group. ... It has been suggested that this article or section be merged with cooking oil. ... In chemistry, non-aromatic and non-cyclic (acyclic) organic compounds are called aliphatic. ... In chemistry, an aromatic molecule is one in which electrons are free to cycle around circular arrangements of atoms, which are alternately singly and doubly bonded to one another. ... In chemistry, a hydrocarbon is a cleaning solution consisting only of carbon (C) and hydrogen (H). ... Mineral oil or liquid petrolatum is a by-product in the distillation of petroleum to produce gasoline. ... European Union Chemical hazard symbol for oxidizing agents Dangerous goods label for oxidising agents An oxidizing agent (also called an oxidant or oxidizer) is referred to as A chemical compound that readily transfers oxygen atoms or A substance that gains electrons in a redox chemical reaction. ... The haloalkanes (also known as halogenoalkanes) are a group of chemical compounds, consisting of alkanes, such as methane or ethane, with one or more halogens linked, such as chlorine or fluorine, making them a type of organic halide. ...

Applications

LDPE is widely used for manufacturing various containers, dispensing bottles, wash bottles, tubing, and various molded laboratory equipment. Its most common use is in plastic bags. Other products made from it include: One half of a bronze mould for casting a socketed spear head dated to the period 1400-1000 BC. There are no known parallels for this mould. ... To meet Wikipedias quality standards, this article or section may require cleanup. ...

• Trays & general purpose containers
• Food storage and laboratory containers
• Corrosion-resistant work surfaces
• Parts that need to be weldable and machinable
• Parts that require flexibility, for which it serves very well
• Very soft and pliable parts
• Six-pack soda can rings
• Extrusion coating on paperboard and aluminum laminated for beverage cartons.

The weldability of a material refers to its ability to be welded. ... A lathe is a common tool used in machining. ...

See also

• High density polyethylene
• Linear low density polyethylene
• Ultra high molecular weight polyethylene

RICHARD LEES, PLATSIC EXPERT . 856-797-5690 HDPE has SPI resin ID code 2 High-density polyethylene (HDPE) is a polyethylene thermoplastic made from petroleum. ... Linear low density polyethylene (LLDPE) is a substantially linear polymer, with significant numbers of short branches, commonly made by copolymerization of ethylene with longer-chain olefins. ... Ultra high molecular weight polyethylene (UHMWPE), also known as high modulus polyethylene (HMPE) or high performance polyethylene (HPPE), is a thermoplastic made from oil. ...

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