What are the excellent characteristics of water soluble film?

● Environmentally friendly
PVA film products are green packaging materials, which are neither toxic nor hinder the growth and reproduction of microorganisms, and can be completely degraded.
PVA material has both water and biological degradation characteristics. First, it dissolves in water to form a glue solution and penetrates into the soil to increase the agglomeration, air permeability and water retention of the soil. It is especially suitable for sandy soil transformation. The PVA material in the soil can be decomposed by bacterial strains isolated in the soil, and finally degraded into CO2 and h2O.

● water soluble
1. It is soluble in cold water, and the water-soluble speed can be designed and selected. According to its dissolution speed, it is divided into three types: instant, medium and slow. The dissolution rate depends on the water temperature and film thickness. The higher the water temperature, the faster the dissolution, and vice versa.
2. According to the appearance, it can be divided into smooth and embossed
3. According to the color, it can be divided into colorless and colored (red, blue, yellow, green, etc.)

● Security
PVA film can avoid direct contact between users and toxic substances;

● Transparency and gloss
The transparency and gloss of PVA film are superior to other films.

● moisture permeability
The moisture permeability of PVA film is similar to that of cellophane. It is a film with extremely high moisture permeability, and no fog droplets are generated when packaging hot and humid items.
The water content of the water-soluble film will vary with the ambient humidity. Usually, the water-soluble film is encapsulated with PE film to keep its water content unchanged. When the water-soluble film is taken out from the PE film, the water content will change with the ambient humidity, and the performance will also change.

● Barrier
PVA film has strong permeability to moisture and ammonia, but has excellent barrier properties to oxygen, nitrogen, hydrogen, helium, argon and carbon dioxide. The use of PVA film can keep the components of the packaged product and itself intact. smell.

● Anti-static
Many plastic films have strong electrification properties, while PVA films have almost no static electricity. In the process of packaging products with PVA film, the plasticity will not be reduced or electrostatic dust will not be caused by static electricity.

● Printability
PVA film has strong polarity and good printing performance. It can be printed without electric spark treatment. It has been widely used in special printing industry, such as water transfer film substrate.

● Strength and weather resistance
PVA film has good strength and toughness, high tensile strength, and its tear resistance ranks first among all kinds of films.

● Moisture and gas permeability
The water-soluble film has strong permeability to moisture and ammonia, but has good barrier properties to oxygen, nitrogen, hydrogen and carbon dioxide. These characteristics make it possible to keep the ingredients and original smell of the packaged products intact.

● Oil and organic solvent resistance
PVA film has excellent oil resistance (vegetable oil, animal oil, mineral oil), fat resistance, organic solvent and carbohydrate resistance. However, strong alkalis, strong acids, chlorine radicals and other substances that can chemically react with PVA (such as borax, boric acid, some dyes, etc.) are not suitable for PVA film packaging.