Test method for coefficient of friction of polyethylene shrink film

Why do pickled vegetables become rancid, mildewed, and swollen? What properties should be focused on when inspecting the material of instant coffee packaging? What are the common packaging forms of instant coffee?

At present, the main packaging methods include bags, barrels, and cups. Most of them are fried and non-fried. The moisture content of these two forms of instant noodles is relatively low. Among them, the noodle cake is easy to become soft, and it also creates conditions for the reproduction of microorganisms, which can easily cause the noodle cake to become moldy. This r...

There are many types and forms of pharmaceutical products, most of which are sensitive to oxygen, easily oxidized and deteriorated, discolored, and smelly, etc., which not only affect the curative effect of the product, but the toxic and harmful substances produced by oxidation can even endanger life. Medicines with ingredients such as calcium salts tend to absorb carbon...