High Density Polypropylene (HDPP)
High density polypropylene (HDPP), also called polypropene is a thermoplastic polymer, made up of the monomer, propylene. It can be manufactured as a dense product that has high resistance to chemical cleansers but also relatively light and flexible with a low melting point between 130 and 170 degrees C.
Polypropylene (PP) is a commonly used material for packaging, automotive parts and textiles, whilst HDPP is commonly used to manufacture pipes as an alternative to high density polyethylene (HDPE). HDPE is naturally greater resistance to UV but HDPP can contain additives that increases its UV stability. HDPP can become more brittle at lower temperatures and poorer resistance to oils than HDPE.
Polypropylene (PP) including High density polypropylene (HDPP) comes under category 5 in the Resin Identification Code (RIC) system for plastic classification, where as high density polyethylene (HDPE) falls in category 2. To differentiate between the two under a burn test ,HDPP tends to smell of petroleum whilst HDPE smells more of melted candlewax.
[edit] Related articles on Designing Buildings
- Adhesives.
- Construction plastics market.
- ETFE.
- High density polyethylene (HDPE).
- Glass reinforced plastic GRP.
- Plasticisation.
- Plastic in construction.
- Plastic and recycling.
- Polyethylene.
- Polymers.
- Recyclable construction materials.
- Rubber.
- Thermoplastic materials in buildings.
- Transparent insulation materials.
- Types of plastic.
- Weatherboarding.
Featured articles and news
Scottish Government action to reach net-zero targets
Retrofit expert group highlight critical actions needed.
A forward thinking, inclusive global community of members.
From engineered product life-spans, to their extension.
Circular economy in the built environment
A brief description from 2021. Where are we now?
Mental Health Awareness Week with ABS
Architects Benevolent Society programme of activity.
CLC publishes domestic retrofit competency framework
Roadmap of Skills for net zero.
May 13-19: Moving more for our mental health.
Understanding is key to conservation.
Open industry engagement survey seeks responses
Institutions and the importance of engagement.
National Retrofit Hub unveils new guide
Digital Building Logbooks and Retrofit: An Introduction.
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.
Getting the most out of heat pumps and heating
How heat pumps work and how they work best.
Electrotechnical excellence, now open for entries.