Can oil pressed stuff be packed in plastic bags

The composition of the plastic bag and the oil can be similar to each other, so it is best not to use a plastic bag.

It is better not to use plastic bags for oil presses.

Oil can pass through plastic bags because of the structure and properties of the plastic. Plastics are composed of long chain-like polymers, and their molecular structure contains a large number of non-polar bonds, so it has good isolation and corrosion resistance, excellent physical and chemical properties, and is easy to make and process. However, due to its structure, plastic materials have a certain degree of air permeability.

In this case, the oil molecule is a non-polar molecule that is similar to the plastic molecule, and they are also similar in physical and chemical properties. Because the oil molecules are relatively small, the oil molecules are able to pass through the gaps between the plastic molecules, forming a tiny osmotic flow inside the plastic material and allowing it to pass through the plastic bag.

On the other hand, in the process of processing and using plastic bags, because of the presence of additives such as plasticizers, or because of the temperature and pressure in the process of material processing, the degree of polymerization of plastics is different, and the bonds between molecules are not tight enough, resulting in a large gap between plastic molecules. As a result, the molecules of different plastics have different gaps between them, and the size of the molecules that pass through them also differs.

In addition, the speed at which oil penetrates through the plastic bag is affected by many other factors. For example, temperature, pressure, and oil concentration are all important factors that affect the passage of oil through plastic bags. The higher the oil concentration, the higher the temperature, and the higher the pressure, the faster the oil will penetrate.

In short, the oil can pass through the plastic bag because of the existence of the intermolecular gap of the plastic, and under the action of osmotic force, the oil molecules form a certain physical flow between the molecular interstitials, so as to penetrate out. However, the factors that cannot be completely avoided are the influence of factors such as temperature, pressure and concentration differences on the permeation velocity. <>

1.The main component of plastic bags is polyvinyl chloride, which is organic. Oils are fatty acid glycerides and are also organic. According to the principle of similar miscibility, oil can theoretically dissolve plastic bags.

2.Since the main component of plastic bags is polyvinyl chloride, polyvinyl chloride is a polymer compound. Molecules are bound together by intermolecular forces. There is a lot of gap. can be passed through the oil molecules.

The density of oil is less than that of plastic bags.