What are the disadvantages of plastic mobile phones? What are the disadvantages of plastic?

Hello, the biggest advantage of the plastic case mobile phone is that it can be molded in one piece, without leaving white stripes for the antenna, and it is convenient to shape, more resistant to falling than the glass shell, and the cost is low.

The disadvantage is that it is not as strong as metal, and the appearance is not as beautiful as that of a glass case.

The use of plastic as the body material is used by many mobile phones on the market; The most prominent advantages are low cost, light weight, colorful, and no signal difficulties caused by the metal body, giving mobile phone manufacturers more freedom to play. The disadvantage is that plastic mobile phones are easy to make people feel cheap, and for smart phones with high requirements for heat dissipation, the heat dissipation effect of plastic body mobile phones is obviously average, and it may affect the normal operation of mobile phones after a long period of use.

Plastic mobile phones. Lightweight, inexpensive. The disadvantage is that it is easy to break and easy to wear and tear.

Plastics have the benefits of plastics, and metals have the benefits of metals. Everyone will prefer metal, because the texture and strength of metal are very good, but metal cannot completely replace plastic, and metal will affect the signal of mobile phones. Therefore, some places must use plastic, and relatively speaking, plastic ** is relatively cheap.

Therefore, generally low-end mobile phones will use plastic bodies.

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!

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.

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.