Advantages And Disadvantages of Plastic Properties(2)

The Disadvantages of Plastics

1.Poor heat resistance and easy to burn

This is the biggest drawback of plastics. Compared with metal and glass products, their heat resistance is far inferior. When the temperature is slightly higher, they will deform and are easy to burn. During combustion, most plastics can produce a large amount of heat, smoke, and toxic gases; Even thermosetting resins can smoke and peel off at temperatures above 200 degrees Celsius

2.As the temperature changes, the properties will also greatly change

High temperature goes without saying, even when encountering low temperature, various properties will greatly change

3.Low mechanical strength

Compared to metals of the same volume, the mechanical strength is much lower, especially for thin products, and this difference is particularly evident

4.Easy to be corroded by special solvents and drugs

Generally speaking, plastics are less susceptible to chemical corrosion, but some plastics (such as PC, ABS, PS, etc.) have particularly poor properties in this regard; In general, thermosetting resins have strong corrosion resistance

5.Poor durability and easy aging

Whether it is strength, surface gloss, or transparency, they are not durable and may experience creep under load. In addition, all plastics are afraid of UV and sunlight exposure and will age under the influence of light, oxygen, heat, water, and atmospheric environments

Easy to be damaged and easily contaminated with dust and dirt

The surface hardness of plastics is relatively low, making them susceptible to damage; Additionally, as it is an insulator, it carries static electricity and is prone to dust contamination

6.Poor dimensional stability

Compared to metals, plastic has a high shrinkage rate, making it difficult to ensure dimensional accuracy. When exposed to moisture, moisture absorption, or temperature changes during use, the size can easily change over time