Excellent chemical resistance to acids and bases
Superb fatigue life, ideal for living hinges
Low density, so parts are light and cheap
Food contact and medical grades available
Good impact strength, especially at low temperature
Moulded, machined, welded and thermoformed
| Homopolymer PP |
| Copolymer PP |
| Glass-filled PP |
| Talc-filled PP |
| PP sheet and rod |
| Food contact grades |
| Specification | Details |
|---|---|
| Tensile strength | 33 MPa |
| Impact strength | Notched Izod 25–60 J/m |
| Heat deflection | 100 °C at 0.45 MPa |
| Density | 0.905 g/cm³ |
| Shrinkage | 1.0–2.5 % (high) |
| Chemical | Excellent, non-polar |
Moulded-in texture
Painting with PP primer
Ultrasonic welding
Laser marking
Its non-polar surface resists adhesion, so parts need flame, plasma or primer treatment before bonding or painting. We specify the treatment in the process plan.
A thin PP section that flexes thousands of times without breaking, which is why PP dominates flip-top lids and clip designs. Living hinges must be designed in the flow direction of the mould.
Yes, between 1 and 2.5 %, which is much higher than ABS. Moulds and cooling are designed around that shrinkage, and wall thickness consistency matters more than with other resins.
Metals and engineering plastics for CNC machining: aluminium, stainless, steel, titanium, brass, copper and high-performance polymers with grade guidance.
Resins for injection moulding: ABS, PP, PC, PA, POM, PBT, PEEK and glass-filled grades with shrink, temperature and application guidance.
Materials for industrial 3D printing: PA12, PA11, glass-filled nylon, TPU, engineering resins and high-temperature polymers compared by process.
Sheet materials for fabrication: cold rolled and galvanised steel, stainless 304/316, aluminium 5052/6061 and copper, with thickness and finish guidance.
FRP and GRP material options: glass and carbon fibre reinforcements, polyester, vinyl ester and epoxy resins, foam and honeycomb core materials.
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