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Excellent chemical resistance to acids and bases
Excellent chemical resistance to acids and bases
Superb fatigue life, ideal
Superb fatigue life, ideal for living hinges
Low density, so parts are light and cheap
Low density, so parts are light and cheap
Food contact and medical grades available
Food contact and medical grades available
Good impact strength, especially at low temperature
Good impact strength, especially at low temperature
Moulded, machined, welded and thermoformed
Moulded, machined, welded and thermoformed
材料
| Homopolymer PP |
| Copolymer PP |
| Glass-filled PP |
| Talc-filled PP |
| PP sheet and rod |
| Food contact grades |
关键规格
| 项目 | 参数 |
|---|---|
| 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 |
表面处理与后加工
Moulded-in texture
Moulded-in texture
Painting with PP primer
Painting with PP primer
Ultrasonic welding
Ultrasonic welding
Laser marking
Laser marking
常见问题解答
Why is PP hard to glue and paint?
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.
What is a living hinge?
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.
Does PP shrink a lot?
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.
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