Paper cups, glass cups, porcelain cups, wooden cups, which cups are the slowest to heat

The best is the glass, then the enamel cup, the ceramic cup, the plastic cup, the tempered cup, the first choice for drinking cups should be glasses!

The glass does not contain organic chemicals in the firing process, when people drink water or other drinks with the glass, they do not have to worry about the chemicals being drunk into the stomach, and the glass surface is smooth, easy to clean, bacteria and dirt are not easy to breed on the wall of the glass, so people drink water from the glass is the healthiest and safest.

The second is the enamel cup, because the enamel cup is made after being enameled at a high temperature of thousands of degrees, and does not contain harmful substances such as lead, so it can be used with confidence.

There are some cups that are not very suitable for use! Be careful!

The colorful ceramic cups are very pleasing, but in fact, there are huge hidden dangers in those bright pigments, especially the inner wall is coated with glaze, when the cup is filled with boiling water or acidic, alkaline drinks, the lead and other toxic heavy metal elements in these pigments are easy to dissolve in the liquid, and people drink the liquid with chemicals, which will cause harm to the human body. Plasticizers are often added to plastics, which contain some toxic chemicals, when hot water or boiling water is filled with plastic cups, toxic chemicals are easily diluted into the water, and the internal microstructure of plastics has many pores, which hide dirt, and it is easy to breed bacteria if it is not clean. Therefore, experts remind that when buying plastic cups, you must choose a water cup made of food-grade plastic that meets national standards.

Glasses, porcelain cups, wooden cups, which cups are these cups.

1. Plastic cups are a more common type of cups in our daily life, the main three plastic cups are PC cups, PP cups and Tritan cups are plastic cups that can withstand high temperatures, but if you want to say which plastic cup can withstand high temperatures, it is a cup made of PC plastic!

2. But from the above temperature resistance, the temperature resistance of the PC plastic cup can reach about 135, and the temperature resistance of different PC materials is also different, and some will even be higher, so the cup made of PC material is the most resistant to high temperature, but the irony is that as the most high-temperature resistant plastic cup, it is the most low-temperature resistant plastic cup, because the PC material contains bisphenol A, bisphenol A will be released at high temperatures, do not underestimate the harm of bisphenol A, long-term intake of bisphenol A can cause cancer, Therefore, some people with common sense will not use PC cups to hold water!

3. The second is the PP material plastic cup, the temperature resistance of the PP material is generally around 120, and the PP plastic material does not contain bisphenol A, because of this, the PP material is also the only plastic material that can be put in the microwave oven to heat the plastic material, and then there is the Tritan material, the highest temperature resistance is generally about 96, although in terms of temperature resistance, the Tritan material is the lowest among the three materials. However, the safety of Tritan plastic material is the safest plastic cup material among the three materials.

The iron cup will cool the slowest because it has the lowest thermal conductivity. Plastic cups and glasses have a higher thermal conductivity, but they are still faster than iron cups. The thermal conductivity of a ceramic cup is between a glass cup and an iron cup, so its cooling rate is also in between.

Therefore, the answer is (2) iron cups cool the slowest.

Summary. Dear, I'm glad to answer for you: plastic cups, stainless steel cups, ceramic cups, glass cups, paper cups + which cup ice cubes melt fast?

Paper cups melt the fastest. Because the thermal conductivity of paper cups is weak, heat energy cannot be transferred to the inside of the cup quickly, so that the ice cubes melt quickly.

Plastic cups, stainless steel cups, ceramic cups, glass cups, paper cups + which cups ice cubes melt fast.

Dear, I'm glad to answer for you: plastic cups, stainless steel cups, ceramic cups, glass cups, paper cups + which cup ice cubes melt fast? Paper cups melt the fastest.

Because the thermal conductivity of the paper cup is weak, the heat energy cannot be transferred to the inside of the cup quickly, and the ice cubes melt quickly from grinding.

Plastic cups, stainless steel cups, ceramic cups, glass cups, paper cups The melting speed of the ice cubes is ranked from fast to slow.

Dear, I'm glad to answer for you: the melting order is paper cups> plastic cups> stainless steel cups, glass cups, > ceramic cups.

The speed at which the ice cubes melt will be affected by factors such as the design, thickness, and material of the cup.

Thick cups for sure.

When piping hot water is poured into an iced glass, the cup may break.

The reason is the uneven expansion of the glass. When hot water enters the cup, the wall of the cup cannot be heated all at once, first, the inner wall will be heated, but the outer wall will remain in a cooling state, causing the inner wall to expand rapidly, while the outer wall remains in its original state; Therefore, the outside side will be subjected to strong pressure from the inside, and the glass will be shattered.

Many people think that thicker glasses are less likely to break, but this is a misconception, on the contrary, when pouring hot water, thick cups are more likely to break, while thin cups are less likely to break. Because the outer wall of the thin cup can be heated quickly, so that the temperature of the inside and outside is equal, and the expansion is uniform; However, the outer wall of a thick cup cannot be heated immediately, so the temperature difference between the inner and outer walls is large, and the expansion is uneven, resulting in cracking. However, a thin cup is not only thin on the side walls, but also on the bottom of the cup.

This is because, when pouring hot water, the bottom of the cup is heated first, and if the bottom of the cup is thick, it can also cause the cup to break for the same reason.

As can be seen from the above explanation, the thinner the glass container, the less likely it is to break when exposed to hot water. For example, a very thin beaker is heated by putting water in the cup and heating it directly by the gas stove without breaking.

So, what can we do to avoid a broken cup? Experienced mothers will put a spoon in the cup first, what is the principle of this?

When hot boiling water is poured into the cup at once, the temperature difference between the inner and outer walls of the cup is very large, which causes the inside and outside of the cup to expand unevenly, and the cup breaks. But if cold water is injected, there will not be much temperature difference; Put a spoon in the cup, and for the cup, pour hot water as if you were pouring cold water. When hot water is poured into a glass with low thermal conductivity, because the spoon is a metal product, it is a good conductor of heat, so the spoon will quickly absorb part of the heat, and reduce the temperature of the hot water, so that the hot water becomes lukewarm; In this case, the cup certainly does not break.

Then, we continue to pour boiling water, and there will not be much danger.