Low Density Polyethylene (LDPE)
Low Density Polyethylene LDPE is part of the Polyethylene family of thermoplastics which include HDPE and MDPE. LDPE has the least dense molecular structure, when ethylene is polymerized it is straight polymer chains, with branches from a main chain, LDPE has the most branching as so is least dense.
LDPE, HDPE, LLDPE, PP are polyolefins, which are high molecular weight hydrocarbons, they are some of the only plastics existing that have a lower specific gravity, weighing less than water. They are susceptible to oxidation and UV damage.
LDPE is lighweight and flexible, so often used in the manufacture of various containers, dispensers, squeeze bottles, tubing, plastic parts and moulded elements of computers and equipment. On constructions sites and factories it os often used as key element to pallets packing and shipping as a shrink wrap.
[edit] Related articles on Designing Buildings
- Glass reinforced plastic GRP
- Glass fibre reinforced plastic
- High Density Polyethylene (HDPE)
- High Density Polypropylene (HDPP)
- Polycarbonate plastic
- Polypropylene in the construction industry.
- Plastic cladding
- Plastic coating market
- Plastic in construction
- Plastic in concrete
- Recycled plastic bridges
- Wood plastic composites market for construction
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
The heritage of nuclear and conventional power stations.
New measures to stop people being ripped off
Government to protect families from cowboy builders and aggressive bailiffs.
New Futurebuild showcase brings an innovation-first approach.
National Planning Policy Framework
Understanding the 2026 changes.
ECA's public affairs priorities
Member consultation opens to shape priorities for 2027 to 2030.
Dutyholder responsibilities from 1 July 2026.
Where performance meets practice
The Building Envelope Stage at UKCW Birmingham.
CIAT publishes briefing on planning reforms.
Leaders in Learning for Practice Network
Call for conservation leaders in learning to register interest in new network.
The importance of early engagement
Construction lessons from the Trillium HealthWorks Experience Centre.
Mayors are to be given planning call in powers
Mayors across England will be able to make the most important planning decisions.
The Master Builder: William Butterfield and his times. Book review.

















