What are the biggest disadvantages of plastic and what are the disadvantages of plastic?

1. Easy aging.

The aging of plastic products refers to the gradual change of the molecular structure of the product under the action of sunlight, air, heat and environmental media such as acid, alkali and salt, and plasticizer.

Equal components volatilize, bonded together.

Fracture is generated, which results in mechanical properties.

It becomes bad, and even becomes brittle, destroyable, and other phenomena. Through the improvement of formula and processing technology, the service life of plastic products can be greatly extended, for example, plastic pipes can be used for at least 20-30 years, up to 50 years, which is longer than the service life of cast iron pipes. Another example is the practical application of plastic doors and windows in Germany for more than 30 years, and they are still intact.

2. Flammable. Plastic is not only combustible, but it also emits a lot of smoke when burned, and even produces toxic gases. But by improving the formulation, such as adding flame retardants.

Inorganic fillers, etc., can also be made into self-extinguishing, flame-retardant or even non-combustible products. However, its fire performance is still worse than that of inorganic materials, and attention should be paid to it in use. Consider not using plastic products in some parts of the building that are prone to flames.

3. Poor heat resistance.

Plastics generally have the problem of deformation and even decomposition when heated, so we should pay attention to their limited temperature in use.

4. Small stiffness.

Plastic is a viscoelastic material with a modulus of elasticity.

Low, only 1 10-1 20 of steel, and under the long-term action of load, it is easy to produce creep, that is, the deformation increases with the continuation of time. And the higher the temperature, the faster the deformation increases. Therefore, caution should be exercised when used as a load-bearing structure.

But composite materials such as fiber reinforcement in plastics, as well as certain high-performance engineering plastics.

Its strength is greatly improved, and it can even surpass that of steel.

It is not suitable for degradation, and it does not decompose for thousands of years, which is more damaging to the environment.

on this issue. Non-degradable. Afraid of fire.

1.Poor heat resistance. The milk heat of plastics is far lower than that of glass, ceramics, cement, bamboo and wood and most metal materials (except lead and tin), and the highest heat resistance of general plastics is about 100 degrees, and a few can reach more than 300 degrees.

2.Poor flammability resistance. Most plastics have poor combustion resistance and are flammable materials, which is not as good as natural inorganic materials. Among plastics, only PTFE, rigid polyvinyl chloride, polyphenylene sulfide and so on are flame-retardant plastics.

3.Poor machining accuracy. In the process of plastic processing, molding and use, due to the influence of shrinkage, expansion, creep and swelling and other factors, the dimensional accuracy of the product is poor, and it is not easy to form high-precision products.

4.Easy to age. Plastics are susceptible to light, heat, oxygen, ozone, and bacteria, resulting in the degradation of macromolecular chains, resulting in the loss of their original properties. This is commonly referred to as "aging".

We produce about 300 million tons of plastic globally every year, and only 10% of that is recycled.

One of the biggest problems with plastic is that it will never be biodegraded even after 1,000 years.

But instead, it degrades into smaller fragments, called "microplastics".

According to recent estimates, between 93,000 and 236,000 metric tons of microplastics float in our oceans.

These microplastics are often swallowed by small fish, and the small fish are eaten by the big fish, and finally they are fished up and become our dinner.

So, in reality, we are the ones who eat plastic.

But it is impossible to filter out all the microplastics in the ocean.

Therefore, we must address this problem at the source:

It's about changing our consumption habits.

We hope Sengtor Cent's fully biodegradable pouches can remind you that "plastic isn't beautiful" and that you're beautiful because you've been saying no to plastic!