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Polyethylene foam is a durable, lightweight, resilient, closed-cell material. It is often used for packaging sensitive goods due to its excellent vibration and insulation properties. It also offers high resistance to chemicals and moisture. There are cross-linked, non-cross-linked and extruded types (PE-E) of this foam.
With us, you can get flame-resistant, electrically conductive, antistatic and PE foam of different hardness, which we process in rolls and blocks.
The origin of polyethylene
Low-density polyethylene LDPE was first produced in 1933 in England, at Imperial Chemical Industries Ltd. (ICI) during the studies of the influence of extremely high pressures on polyethylene polymerization. The ICI obtained a patent for this procedure in 1937, and commercial production started in 1939. It was first used during World War II as an insulator for radar cables.
It is a lightweight, versatile synthetic resin obtained by polymerization of ethylene, a member of the polyolefin resin family. It is the most widely used plastic in the world, used to make a wide variety of products, from transparent food packaging and shopping bags to detergent bottles and car fuel tanks. It can also be woven into synthetic fibers or modified to take on the elastic properties of rubber.
Polyethylene is easily recycled, and polyethylene scraps can be melted down and reused.
LDPE is a very flexible material. Its melting point is approximately 110°C (230°F). It is mainly used for: packaging film, garbage and grocery bags, agricultural mulch, insulation for wires and cables, bottles, toys, and household items.
LLDPE has similar properties to LDPE and competes for the same markets.
With a melting point 20°C (36°F) higher than LDPE, this high density polyethylene can withstand repeated exposure to temperatures of 120°C (250°F), meaning it can be sterilized. HDPE products include milk bottles and household cleaners produced by injection molding; shopping bags, construction films and agricultural mulch produced by extrusion; buckets or buckets, caps, appliance housings and toys produced by injection molding.
Linear polyethylene can be produced in ultra-heavy-molecular versions, weighing from 3,000,000 to 6,000,000 atomic units. These polymers can be wrapped into fibers and then drawn or stretched into a highly crystalline state, resulting in high strength and tensile strength many times that of steel. Yarn made from these fibers is woven into bulletproof vests.
Ethylene can be copolymerized with a number of other compounds: for example, ethylene-vinyl acetate copolymer (EVA) is produced by copolymerizing ethylene and vinyl acetate under pressure, using free radical catalysts. EVA copolymers are more permeable to gases and moisture than polyethylene, but are less crystalline and more transparent, and show better resistance to oil and grease. They are used to make packaging film, adhesives, toys, pipes, gaskets, wire layers, drum liners and carpet backings.
Copolymers of ethylene-acrylic acid and ethylene-methacrylic acid are used in automotive parts, packaging film, footwear, surface coatings and carpet underlays. One of the prominent ethylene-methacrylic acid copolymers is Surlin, which is used to make extremely tough, abrasion-resistant golf surfaces.
Other important ethylene copolymers are ethylene-propylene copolymers.
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