Haitung Group Limited, one of the leading agents of Sinopec, is renowned for its distribution and export of various petrochemical products. One of their core products, Polyvinyl Alcohol (PVA), is a versatile and widely used polymer that finds application in various industries including textiles, adhesives, construction, and packaging. PVA is available in different grades, each with its own set of properties and applications. In this article, we will provide a PVA grade selection guide to help businesses and manufacturers choose the right grade of PVA for their specific needs.

PVA, also known as PVOH (poly vinyl alcohol), is a water-soluble polymer that has excellent film-forming, emulsifying, and adhesive properties. It is commonly used as a coating agent, emulsifier, and as a component in adhesives, textiles, and paper products. When it comes to selecting the right grade of PVA, it is important to consider factors such as the degree of hydrolysis, viscosity, and the polymerization degree.

The degree of hydrolysis refers to the extent to which the vinyl acetate monomer units in PVA have been hydrolyzed to vinyl alcohol. PVA with a higher degree of hydrolysis will have more hydroxyl groups, making it more water-soluble and giving it better film-forming properties. This makes it suitable for applications such as textile sizing, paper coatings, and adhesives.

On the other hand, PVA with a lower degree of hydrolysis will have more residual acetate groups, which can impart better chemical and thermal resistance to the polymer. This makes it suitable for applications such as packaging films, mold release agents, and synthetic fibers.

Viscosity is another important factor to consider when selecting a PVA grade. The viscosity of PVA solutions is directly related to the molecular weight of the polymer. PVA with higher viscosity will have longer polymer chains, resulting in stronger films and better barrier properties. This makes high viscosity PVA suitable for applications such as packaging films, adhesives, and coatings.

Lower viscosity PVA, on the other hand, will have shorter polymer chains, resulting in easier solubility and better penetration. This makes it suitable for applications such as textile sizing, paper coatings, and emulsions.

Polymerization degree is a measure of the average number of vinyl alcohol units in a PVA polymer chain. PVA with a higher degree of polymerization will have longer polymer chains, resulting in stronger and more durable materials. This makes it suitable for applications such as textiles, adhesives, and paper products.

On the other hand, PVA with a lower degree of polymerization will have shorter polymer chains, resulting in materials with more flexibility and elongation. This makes it suitable for applications such as emulsions, coatings, and mold release agents.

In conclusion, selecting the right grade of PVA is essential for achieving the desired performance in various applications. Factors such as degree of hydrolysis, viscosity, and polymerization degree play a crucial role in determining the properties of PVA and its suitability for specific applications. With the right grade of PVA, businesses and manufacturers can ensure the quality and performance of their products in the market. As a leading distributor of petrochemicals, Haitiung Group Limited prides itself on providing high-quality PVA and other products to meet the diverse needs of its customers.