What is "engineering plastic"? Explains the difference from normal plastic
- What is plastic "creep"?
- What is the "creep resistance" of plastics?
- The Importance of Preventing Creep in Plastic Parts
What is plastic "creep"?
The term "creep" in plastics refers to the phenomenon of deformation (also known as cold flow) that occurs when a load is applied continuously.
There are three patterns of creep.
- Regression: a state in which the deformation returns to a certain extent when the load is released
- Permanent deformation: The deformation is not resolved by releasing the load.
- Destruction: a condition in which creep is so advanced that it becomes damaged
The occurrence and degree of creep varies depending on the material used, the magnitude of the load applied, and environmental conditions such as temperature.
Therefore, even if the material is the same, the presence or absence of creep and the level of creep will be different if the conditions such as load and temperature are different.
What is the "creep resistance" of plastics?
Creep resistance (creep resistance) is one of the characteristics of plastic materials, and the higher the level of this characteristic, the less likely it is that creep will occur.
For plastic materials, the former has better creep resistance than the latter for thermosetting and thermoplastic resins.
The Importance of Preventing Creep in Plastic Parts
Excellent creep resistance is one of the most important factors in the manufacture of plastic parts.
Products made from plastic parts are subjected to different forces depending on the conditions of use and the environment in which they are used, and this also affects the plastic parts.
For example, it's not uncommon for people to have had the experience of leaving a heavy object on top of a plastic wardrobe case and before you know it, it's deformed into a bow.
The same is true for small plastic parts, which, depending on what part of the product you are using, can be subjected to high loads that, depending on the conditions of use, can continue to deform or break.
There is no denying the possibility that a single component can cause deformation or breakage, which can lead to the malfunction or failure of an entire product.
While creep resistance is not an absolute requirement for all plastic parts, it is definitely a status that cannot be ignored in the manufacture of high quality plastic parts and products.