Polypropylene in the construction industry
Contents |
[edit] Introduction
Polypropylene (PP, also known as polypropene or polymerised propene) is a type of thermoplastic polymer resin that has similar qualities to polyethylene (PE) but is slightly harder and has better resistance to heat and organic solvents. After PE, polypropylene is the second-most widely produced commodity plastic with a global market (2013) of around 55 million tonnes.
A member of the polyolefin family of resins, PP can be injection moulded and extruded into many shapes and products such as cups, cutlery, containers, housewares and car parts e.g batteries. It is also spun into fibres for inclusion in industrial and domestic textiles, including for clothing.
As a plastic it is extremely versatile and found in common household items and used in both commercial and industrial applications.
[edit] Properties
- Lightweight, tough and flexible
- Heat resistant (high melting point (around 160°C) – used in microwaves, dishwashers, food containers
- Chemically inert
- Impact and freeze-resistant
- High shatter resistance
- Low moisture absorption
- Mould resistant
- Low density allows lower-weight mouldings to be made
- Resistant to fats and organic solvents
- Accepts colour and dye without degrading
- Reasonably inexpensive
- Does not contain BPA (bisphenol A - which some claim can leach into food products)
- Fatigue resistance – allows use as a plastic hinge
- It can float in water
[edit] Typical applications
It has a large number of end-use applications in the construction industry due to the wide range of grades available and the use of additives to modify properties:
- PP fibres are added to concrete to increase strength and reduce cracking and spalling
- Non-woven fabrics for ground stabilisation
- Roofing membranes (waterproofing top-layer in single-ply systems)
- Reinforcement in construction and road paving
- Electrical cable insulation (alternative to PVC)
- Piping systems
- Carpets, rugs and upholstery
- Medical and laboratory equipment
- Reusable containers
- Plastic machine parts
- Industrial rope and cordage
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
Top 50 firms awarded 52bn of projects in the last year
New engineering data shows.
Enhancing construction site reporting efficiency
Through digitisation and the digital revolution.
Noise in the built environment
BSRIA guide TG 20/2021.
17,000 people suffer conditions as a result of exposure to excessive noise at work.
Turning down the noise: Auditory health
A pervasive risk with far-reaching consequences.
UK Construction Week, London is here !
Debuting major international pavilions and much more.
Getting the most out of heat pumps and heating
How heat pumps work and how they work best.
Plumbing and heating for successful retrofit and renovation
Low temperature underfloor systems and heat pumps.
Cost-of-living crisis and home improvement plans
Starting on the right footing and top tips for projects.
Delays on construction projects
Types, mitigation and the acceleration of works.
From Chaucer to Fawlty Towers.
Electrotechnical excellence, now open for entries.
Net zero electricity grids BSRIA guide NZG 5/2024
Outlining the changes needed to transition to net zero.
CIOB Global Student Challenge 2024
Universitas Indonesia wins for second year running.
ECA 2024 Apprentice of the Year Award
Entries open for submission until May 31.