What should I do if the cap of the thermos is too tight and it can t be opened?

The main reason why the cap of the thermos flask cannot be opened is that the air in the bottle is too low due to the volume shrinkage after cooling, and the external pressure is relatively increased, so it is not easy to open. Give the thermos a relatively high temperature environment, after a period of time, the air in the bottle will be relatively warm, and it will be easier to open at that time.

If the cap of the thermos bottle is too tight, it is sucked in, and you can't open it yourself, you can directly put the cap in a particularly hard place and knock it on a flat bottom position, find a table and knock it a few times, and then open it lightly for a year, this is a particularly simple method, you can try it.

1. If the lid of the thermopot is sucked and cannot be opened, there is a certain handling skill, and it can generally be opened by scalding it with boiling water; You can also pat the bottom of the cup with your hand a few times, and then flush the rim of the cup up, and you can unscrew it.

2. You can also try to put the thermos whole into a basin filled with hot water, turn it slowly, and open it after the thermos is evenly heated.

3. Pierce the lid with a needle along the side of the pot, and the air in the thermos can be opened directly, and the method is relatively easy to operate.

Soak it in hot water for a while, then put a rubber band on the lid of the cup to reduce friction and open it with one twist. Flush the bottom of the empty cup up, pat the bottom of the cup with your hand a few times, and then flush the rim up and unscrew it. Cool the cap with ice water and twist slowly until it loosens.

Wait for a day, and after cooling, it will naturally loosen because of thermal expansion and contraction. The pressure inside the thermos is high, the temperature is high, and the lid of the thermos is inflated.

Punch a small hole in the cork and you're good to go.

I usually break it left and right first, forcefully, or pry it directly with something.

You can wait for it to cool down first, because if you suddenly jerk it on, it might**.

Glasses are the containers we commonly use, which can be filled with water or food, and some canned foods are also glasses. But sometimes the lid of the cup is not so easy to unscrew, and sometimes it is filled with hot water, and it will be sucked and cannot be opened, so what can be done to open it?

Why can't the cup be opened with hot water?

Since the bottle contains boiling water, the air in the bottle is hot air. When the pressure is constant, the number of molecules in the air is very small. When the air in the bottle returns to normal temperature, the pressure in the bottle decreases.

The external atmospheric pressure forces the bottle, but because the bottle is harder, it will suck up the softer cap.

What should I do if the lid of the glass bottle of hot water can't be opened?

1. Wrap the lid of the open water cup with a wet towel or cloth.

2. Turn the cup upside down, tap the bottom of the cup more than ten times, and then rotate the lid.

3. Soak the cup in 90 degree hot water for 8-10 minutes, then tighten the lid.

4. Heat the lid over fire for a few seconds before opening it.

5. Pad the upside-down cup with a damp towel to increase the friction between your hands and the lid. After ten minutes, tighten the lid again.

The lid of the glass sucks up how to be able to unscrew.

1. Spoon. Use a thin stainless steel spoon to gently pry the edge of the glass cap. After gently prying the surroundings, air will enter the glass bottle. Once the pressure is relieved, it can be easily unscrewed. Be careful with a sturdy spoon so as not to bend it.

2. Hot water. Place the glass bottle face down on a plate and pour a small amount of hot water into the plate. The bottle can be removed after about 30 seconds. At this point, the cap will be heated and expanded, and the glass cap can be easily unscrewed.

3. Adhesive tape. The cap of a glass bottle is usually smooth, which increases friction and can help loosen the cap. Wrap a little tape in the direction of the cap opening, holding the bottle with one hand and pulling the tape with the other hand to open the lid of the glass bottle.

Put the bottle in hot water, soak it for a while, and then twist it by hand until it almost opens.

Rinse with cold water and you can twist it open.

The bottle is sucked by hot water because the water is too hot, poured into the bottle, the air pressure in the bottle rises instantly, and the principle of thermal expansion and cold contraction will make the bottle mouth tighter, and at this time, the air pressure outside the bottle is less than the inside of the bottle, so it will be difficult to unscrew. At this time, you can try to use cold water to cool the bottle, or use a paper pad to increase the friction.

Classification of bottles

Plastic bottles are generally marked on the bottle body, from No. 1 to No. 7, divided into 7 categories, formulated by the relevant institutions of the U.S. plastics industry. So that the public does not need to bother to learn the similarities and differences of various plastic materials, they can simply join the ranks of the first work. These 7 are listed as follows:

No. 1: PET (polyethylene terephthalate).

The container made of this material is the common plastic bottle for soda, also commonly known as "PET bottle".

No. 2: HDPE (High Density Polyethylene).

Containers for detergents, shampoos, body soaps, cooking oils, pesticides, etc., are mostly made of HDPE. The container is mostly opaque and feels like wax.

No. 3: PVC (polyvinyl chloride).

It is mostly used to make water pipes, raincoats, school bags, building materials, plastic films, plastic boxes and other utensils.

No. 4: LDPE (Low Density Polyethylene).

Most of the plastic bags that can be found everywhere are made of LDPE.

No. 5: PP (polypropylene).

It is mostly used to make buckets, garbage cans, baskets, baskets and food containers for microwave ovens.

No. 6: PS (polystyrene).

Due to its low water absorption, it is often used to make building materials, toys, stationery, rollers, as well as cups and boxes for drinks in fast food restaurants or disposable tableware.

No. 7: Miscellaneous.

The above content reference: Encyclopedia - bottle.

The bottle is sucked in by the hot water, because the water vapor will increase the air pressure and it is difficult to open, put it in cold water to cool for a while before opening it.

Other ways to open:

1. Use a key or other thin metal sheet to gently pry at the gap between the lid and the mouth of the cup, and the air will enter with a snort, and it is easy to open with a slight twist.

2. Hold the bottle upside down, pat the lid of the cup twice, and then open the bottle upright.

This can be opened by patting the bottom of the bottle, hitting the cap with the water and air pressure in the bottle, and then twisting it.

Thermal expansion and cold contraction. Put it in slightly hot water

As soon as it is hot, the pressure inside increases.

It's easy to unscrew.

Twist it firmly or wait for it to cool or soak in hot water.

o( o I usually choose to twist hard hahaha.

Soak it in hot water before turning it on, or shake it up and down a few times! Then unscrew it again!

Shake the glass vigorously and quickly. If it doesn't work, put it in a basin and soak it in hot water.

Then let the hot water flush the bottle cap and bottle body, and use the principle of thermal expansion and cold contraction to unscrew it.

Is the water hot or cold?

It is not absorbed by the heat, but the negative pressure that forms in the cup after the hot water is cold. So you need to reheat the water in the cup before you can open it, such as soaking the cup in hot water. However, since you have a double-layer cup, it is difficult for this method to heat up quickly.

Depending on the material of the lid, you can try to warp the lid with a flathead screwdriver, just like you would if you were opening a canned bottle. In particular, be careful not to press against the glass, which may damage the cup.

The water is hot expansion and contraction, when the water temperature is high relative to the volume is slightly larger, now the volume is cold and the volume is reduced, and the water cup is sealed and the air balance pressure is not entered, so that the pressure in the cup is less than the outside, so it can not be unscrewed. The solution is to put the cup into the hot water to re-heat the water in the cup and restore the volume, you can blanch for a while and then twist and try, if not, continue to heat.

Put the cup in hot water, and the temperature of the water should not be lower than the water you poured into the cup, and soak it for a while, and it will unscrew.

The exterior can be opened with hot water!

The reason is that the air pressure on the outside of the cup is greater than the air pressure on the inside. The external air pressure creates an additional force on the lid, so that the lid of the cup cannot be opened.

There are six ways to open the mountain:

1. Turn the cup upside down and pat the bottom of the cup, and then twist the lid vigorously to unscrew the lid of the cup.

2. Soak the cup in hot water, so that when the water in the stainless steel thermos cup heats up and the volume expands, it is easy to open.

3. You can put the cup in the refrigerator to freeze, and after taking it out, pour the lid with hot water to open it easily.

4. Use a metal sheet (such as a key) to gently pry down the gap between the cup mouth and the cup lid, and it is easy to open with a little air. Nian Lu.

5. Twist vigorously, when the force we use is large to a certain extent (that is, when the friction between the force we use and the cup lid is greater than the pressure formed by the temperature difference), the cup lid will be unscrewed.

6. Quickly heat the lid of the cup so that there is a gap between it and the cup, and then it can be opened.

1. Turn the cup upside down, slap the bottom of the cup a few times, and then screw the cap.

2. Twist vigorously when the force we use is large to a certain extent (that is, when the friction between the force we use and the lid is greater than the pressure formed by the temperature difference), the lid will be unscrewed.

3. Use a key (other flake-like metal is also OK, insert it wider, without hurting the lid) to gently pry it at the gap between the lid and the mouth of the cup, and the air will enter with a snort, and it is easy to open with a slight twist.

4. If you can't open it, the cup is generally under negative pressure, so you can soak the cup in hot water, and when the water in the cup heats up and the volume expands, it is easy to open.

5. Put it in the refrigerator first and freeze it, and pour hot water on the lid (just the lid) after taking it out to ensure that you can open it.

6. Heat the lid of the cup quickly so that there is a gap between it and the cup.

7. If you can't open it, it is generally negative pressure in the cup, you can put the cup in hot water to soak, and when the water in the cup is heated up and the volume expands, it is easy to open.

<>1. Turn the cup upside down and pat the bottom of the cup, and then twist the lid vigorously to open it.

2. You can put the cup in the refrigerator to freeze, and pour the lid with hot water after taking it out, and then you can open it.

3. Use a metal sheet (such as a key) to gently pry down the gap between the cup mouth and the cup lid, and open it with a little air.

4. When the force we use is large to a certain extent (that is, when the friction between the force we use and the lid is greater than the pressure formed by the temperature difference), it can be opened.

5. Heat the lid of the cup quickly, so that there is a gap between it and the cup, and then it can be opened.