Whether the self-heating lunch box is poisonous or not, the pace of life in modern society is very fast, and many office workers have a short meal time. In order to choose disposable or self-heating lunch boxes conveniently and quickly, many people are worried about whether self-heating lunch boxes are harmful to human body after long-term use. Let's see if the self-heating lunch box is poisonous.

Is the self-heating lunch box poisonous? 1 Self-heating lunch box has the advantages of small volume, high thermal efficiency, long heat generation duration, no environmental pollution and no harm to human body.

In outdoor sports, the product can be used to heat food conveniently and safely, including in carriages and tents, when it is inconvenient or forbidden to use naked flame due to severe weather such as strong wind, dust, rain, snow and low temperature. When the heater is working, the water consumption is only about 100ml, and clean water is not needed.

Firefighters from the Propaganda Department of the Fire Prevention Supervision Section of the Tongzhou District Fire Brigade in Beijing said that the self-heating hot pot uses the food self-heating technology, and the self-heating rice also uses this technology. Self-heating hot pot is a sandwich structure, the lunch box on the top is used to hold ingredients and water, and the heating bag on the bottom is used. First put the ingredients on the upper layer and add water, then take out the heating bag from the sealed plastic bag and put it on the lower layer and add water.

Then quickly put the lunch box on the top and cover it, open the exhaust hole, and wait for the heating bag on the bottom to work. 10~ 15 minutes can be eaten. The heating package has different formulas, but it is mainly composed of quicklime, activated carbon, iron powder and aluminum powder. When lime comes into contact with water, it will release a lot of heat, which is the main heat source of heating package.

Activated carbon is an adsorbent, which is beneficial to the adhesion, full contact and chemical reaction of various effective components. Iron powder and aluminum powder can react with oxygen to release a small amount of heat, and the heating package is packed with high-density non-woven fabric. If there is no flame, the state of spontaneous combustion can hardly be achieved.

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In order to eat self-heating hot pot safely, firefighters from the Propaganda Department of the Fire Supervision Department of Tongzhou District Fire Brigade in Beijing reminded consumers to pay attention to the following points:

1, the water heated after the heating package reaction can not be used again, nor can it be used for washing hands or cleaning food;

2. Don't put it on ordinary glass, otherwise it may lead to broken glass;

3, be sure to open the vent to exhaust hot air, so as to avoid small explosion caused by excessive pressure in the box;

4. Try to put it on a horizontal surface to prevent hot water containing chemicals from overflowing; 5. The reactants used in the heating package are not environmentally friendly, so it is recommended to recycle them after cooling.

Is the self-heating lunch box poisonous? 2 heating package will not produce harmful gas.

Food self-heating technology was first developed for the needs of military field operations. With the continuous progress of this technology, it has gradually entered the public's field of vision.

There are many kinds of heating packages, and the composition changes from single component to composite component, such as magnesia-iron powder type, quicklime iron type, quicklime aluminum type and so on.

The principle of heat production is no longer a single chemical reaction, but two or more chemical reactions release heat at the same time. This can achieve the purpose of stabilizing heat release, prolonging heat release time and reducing raw material cost.

The heating process of the heating package is simple, and basically no harmful gas will be generated during the exothermic process, so there is no need to worry about pollution.

At present, most of the heating packages used for convenience foods are quicklime-aluminum. When in use, when put into water, a chemical reaction will occur and then heat will be released. The heat generated by the heating bag can make the water reach the boiling point in a short time, generate steam, and the food placed on the upper layer can be heated quickly.

The heating package before heating is the most harmful

If the heating package is eaten by mistake before use, it will cause oral and digestive tract mucosal burns, which is the most harmful. The raw materials in the heating bag can react with the water and gastric acid in the mouth and stomach, generating heat, which in turn causes gastrointestinal irritation and burns, leading to mucosal erosion, and even a series of symptoms such as water and electrolyte disorder. The more you eat by mistake, the more serious the symptoms are!

In addition to eating by mistake, we should also be alert to accidental inhalation. Inhaling a large amount of powder and particles in the fever bag will irritate and burn the respiratory mucosa, leading to respiratory irritation, dry throat, hoarseness and other symptoms.

Accidentally touching the powder in the heating bag, if there is no water, the problem is not big; If you encounter water, you may burn your skin. Therefore, it is particularly important to avoid the powder in the heating bag from contacting the eyes. Everyone must remember this reminder: it is forbidden to tear open the heating bag.

Be careful of burns during self-heating.

In the process of self-heating, the temperature of the heating package itself can reach more than 150 degrees Celsius, and the temperature of the steam generated can reach as high as 200 degrees Celsius. Accidentally touching it will burn!

If obvious white foam and lime-like substances spill into food during heating, it is best not to eat them again. These substances may contain a large number of unreacted alkaline substances, which may cause irritation or burns to the digestive tract after ingestion. If only a small amount of hot water overflows into the food during heating, it may affect the flavor of the food, but it is harmless and can be eaten normally.

Treat the remaining water after heating.

The used heating bag will become very hard, and there is basically no harm at this time. Pay attention to the residual water after heating. The heated water is alkaline, and its pH value is 10~ 1 1 according to the acid-base test paper. This kind of water also contains a variety of salts and oxides. Eating it by mistake may have potential health hazards, but it will not cause acute organ damage.

Don't drink the water soaked in the heating bag, but if you don't take a sip or two, you'll be fine. If your fingers are accidentally immersed in water, there will be no obvious skin irritation, but for the sake of safety, it is best to dump them.

Correct heating is the last word.

The packaging of self-heating food is marked with the use method and precautions of heating package, as long as it is not illegal to operate, there will be no danger. Attention should be paid to the following matters:

1. Do not use hot water when heating.

Don't block the air outlet at the top of the lunch box.

3. Fever bag is not food, so it must not be eaten, especially to prevent children from eating by mistake. Never let children tear or eat the raw materials of the heating package by mistake.

4. If you accidentally eat the raw materials of the heating package, you can take egg white or milk orally and see a doctor in time.

Is the self-heating lunch box poisonous? 3 the harm of self-heating lunch boxes.

1. The heating package must be used in strict accordance with the instructions, and the air holes should be opened during the heating process, so that the self-heating rice can heat the food under safe and controllable conditions to avoid accidental injuries such as explosion and steam burns.

2. If the heating package is not damaged, the rice can be heated normally. However, if the heating bag is damaged, there may be potential safety hazards, and the heated rice will be contaminated by the substances in the heating bag and cannot be eaten.

Although self-heating rice is very convenient, it is recommended not to eat it for a long time. The main hazard is the lack of vitamins and additives. It is recommended to eat more fresh fruits and vegetables to ensure a balanced diet.

4. Is self-heating rice carcinogenic? Self-heating rice contains additives and may also contain preservatives, which is harmful to health after long-term consumption; When the lunch box is heated, it will produce harmful substances more or less; It is easy to be polluted during processing and storage. It is recommended to eat less.

Steam cooked rice at 150℃

Self-heated rice, also known as instant rice, is a box lunch made of high-quality rice with refined meat, fresh vegetables and mushrooms. Adopting a series of advanced high-tech technologies, vacuum sealed packaging and high-temperature sterilization. It has a heating bag, which can heat up within 3-5 seconds after encountering water, the temperature can be as high as 150℃, the steam temperature can reach 200℃, and the longest heat preservation time can reach 3 hours, so it is easy to make raw rice into cooked rice.

How can self-heated rice quickly reach high temperature in a short time?

It turns out that the heating bag in the self-heating rice is made of coke powder, activated carbon, salt, quicklime and other substances, which will produce high temperature when it meets water. These things are not toxic and have no direct contact with rice, so they have no effect on human body. However, although the heated water is not toxic, it does not meet the drinking water standard. The public should handle it carefully after using it to avoid drinking it.

How to eat self-heating rice: open the package, put the vegetable bag on the bottom layer, tear open the heating bag and put it on the bottom layer of the box, and introduce the water bag into the heating belt. After 2 minutes, the heating bag begins to smoke. Put the lunch box on it and start to heat the rice. Cover it and heat it for about 8- 15 minutes. After heating, pour the dish into the rice and serve.