Precautions for heating aluminum foil bags

How much can aluminum foil bag withstand?

The highest temperature that an aluminum foil bag can withstand is determined by the contents of the bag, as well as the inner material. The average aluminum foil can withstand 270 degrees. So under normal conditions, it's perfectly fine to heat regular food or milk.

So let's look at heating the aluminum foil bag

1, aluminum foil surface cleanliness should be high, no oil and dust, surface tension should be high, should reach more than 72mN/m. A simple method is to test with distilled water, which should be fully saturated on the surface of the foil. If the surface of aluminum foil oil is serious, it will affect the composite fastness of aluminum foil and other materials, especially the packaging bag after high temperature cooking, will occur delayer stripping phenomenon.

2, the number of pinholes of aluminum foil should be less. Aluminum foil should be the best barrier material, but if its own pinhole, its barrier will be discounted, gas, light will quickly direct penetration, content will soon deteriorate. In general, the thicker the foil, the smaller the number of pinholes. For example, a 7 micron thick foil should have fewer than 200 pinholes per square meter. A 9 micron thick foil should have fewer than 100 pinholes per square meter. No matter how thick the foil, the diameter of the pinhole should not be greater than 20 microns.

3, the quality of aluminum foil to soft, folding should not be easy to break, to have a better toughness, purchased aluminum foil should be stored in a dry state, and do not place for too long, should be used as soon as possible, to prevent the aluminum foil moisture absorption oxidation and deterioration.