What are the disadvantages of plastic, and what are the advantages and disadvantages of plastic?

Advantages and disadvantages of plastic compared to other materials:

1. Advantages. 1) Light weight, the specific gravity of plastic is between 0 83 and 2 2 g cm3, of which poly4-methylpentene is the lightest, PTFE is the heaviest, foam is between 0 01 and 0 5 g cm3, while steel is 7 8 g cm3, aluminum is 2 8 g cm3, copper is 8 7 g cm3, glass is 2 5 g cm3, and clay is 1 7 g cm3.

2) Good electrical insulation.

3) Chemical resistance.

4) Good light transmittance and protection, glass light transmittance is 80%, plexiglass is 92%, glass thickness is opaque when it reaches 20cm, PMMA is still clear and transparent when it is up to 1m thick, and other light transmittance such as PC, PET, PS and so on are more than 80%;

5) Shock absorption and sound reduction.

6) Economy. 2. Disadvantages.

1) It is not heat-resistant, and the general plastic use temperature is not high, such as PVC not exceeding 80, PET 120, PET 130, PTFE 250;

2) Easy deformation: the plastic expansion coefficient is large, the temperature deformation is large, and there will be creep in the long-term load, such as the plastic rope will elongate for a long time to dry clothes.

3) Easy aging.

4) It is not easy to decompose and pollute the environment.

For example, the low melting point is also an advantage and a disadvantage, the advantage is that it is easy to form, and the disadvantage is that the heat resistance and oxidation resistance are poor; The same is true for plasticity, which has the advantage of good ductility, but poor relative mechanical properties such as hardness, tensile resistance, and so on.

Durable, waterproof and lightweight.

It's too heavy, the cost is high, and the raw materials are recycled garbage combined, easy to fill cement slurry in the middle, change the size is a headache, at present, the investment almost uses the manufacturer to decorate their ugliness, with flickers and routines to disguise their black conscience face, the use of contract word games to dig a pit for you, all said hollow plastic template is a **, at present I believe that there are many people who are fooled, need to stay away from joining**, I hope to help you!

As a widely used material, plastic has certain advantages and disadvantages in both production and consumption, and here are some common advantages and disadvantages:

Pros:1Lightweight: Plastic is a lightweight material in Yinlu Town, weighing only half as much as many other materials, making it the material of choice for many occasions. Sharp and thick.

2.Corrosion resistance: Plastics have good corrosion resistance and can resist acids, alkalis and chemicals, so they are widely used in many fields.

3.Waterproof: Plastic has good waterproof performance and is an ideal material for the production of water pipes, plastic bags and other products.

4.Low cost: Plastics are less expensive to produce than other materials and are easy to process into a variety of shapes and sizes.

Cons: 1Refractory to degradation: Plastics take a long time to degrade, and some plastics even take hundreds of years to completely degrade, causing great pollution to the environment.

2.No: Many plastics cannot be used, resulting in a large accumulation of waste plastics, which is harmful to the environment.

3.Chemical hazards: Some chemicals in plastics, such as bisphenol A, are considered to be harmful to human health.

4.Easy to deform: Plastics have low hardness and are easily deformed by heat, as well as scratches and abrasions.