Wanwei PVA

PVA (polyvinyl alcohol) is a white, powdery resin obtained by hydrolysis of polyvinyl acetate. Since my country began researching and producing it in the 1960s, its current output ranks first in the world. Polyvinyl alcohol film is great because it's really clear, lightweight, and can keep gases out. It's tough, won't tear easily, and can handle wear. Plus, it can dissolve in water and break down naturally under the right conditions. It is one of the new green materials that has developed rapidly in recent years.   At present, the high-barrier packaging materials on the market mainly include polyvinylidene chloride (PVDC), ethylene-vinyl alcohol copolymer (EVOH) and polyvinyl alcohol (PVA). Polyvinylidene chloride (PVDC) is mainly used in the coating process. PVDC has good oxygen and water vapor barrier properties, and the coating can be heat-sealed with low cost. However, PVDC because of the chloride ions in its structure, it cannot be recycled and reused. When the waste is incinerated, it will also produce hydrogen chloride, dioxins and other toxic and harmful substances to the human body and the surrounding environment. Europe and the United States have begun to restrict its use.     Ethylene-vinyl alcohol copolymer (EVOH) has excellent barrier properties and excellent processability. It has excellent transparency, gloss, mechanical strength, elasticity, wear resistance, cold resistance and surface strength. It only produces CO2 and H20 when incinerated, and is an excellent green and environmentally friendly packaging material. However, when the ambient temperature is relatively high, its barrier properties deteriorate sharply, so it is not suitable for use alone. It is mostly used in the production of multi-layer co-extruded films, such as EVOH five-layer co-extruded films, but most of the equipment relies on imports and is costly.   Polyvinyl alcohol (PVA,PVA 2688 & PVA 088-60) contains a large number of hydroxyl groups in its molecular structure and has hygroscopic energy. As the humidity increases, its gas barrier function decreases. It needs to be coated or plasticized in large quantities before it can be processed and formed. Therefore, the modified PVA coating film that has been hydrophobically modified is often used in the coating process. It has been widely used in the United States and Japan, and has begun to flourish in my country in recent years.   The continuous development and progress of society has prompted people to put forward more requirements and expectations for new materials that are safe, environmentally friendly, degradable and recyclable. The development of the technology of modified PVA coating film that has emerged will not stop. The booming plastic processing industry calls for the birth of new generations of new products. It can be expected that in the near future, as the technology of modified PVA coating film becomes more mature, its share in the structural grade and economic benefits of plastic packaging market products will become larger and larger.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

I. Definition of Carboxylated Polyvinyl Alcohol (CPVA)Carboxylated polyvinyl alcohol（CPVA) is a hydrogen-modified polymer obtained through a carboxylation reaction based on polyvinyl alcohol (PVA，PVA 088-60 & PVA 2688). CPVA  has typically higher solubility and better performance than unmodified PVA.     II. Functions of Carboxylated Polyvinyl Alcohol PlasticizerCPVA can be used as a plasticizer to improve the processing properties and flexibility of plastics. It is often used in the production of soft plastics, coatings, and rubber products. AdhesiveCPVA can act as an adhesive, forming strong bonds between different materials. For example, when used as glue, it can bond materials such as paper, wood, and plastic together. LubricantCPVA can function as a lubricant, reducing friction on contact surfaces and extending the lifespan of materials. It is commonly used in industrial applications such as metalworking, textile manufacturing, and plastic processing. III. Applications of Carboxylated Polyvinyl Alcohol Packaging MaterialsCPVA is used in manufacturing food packaging materials, such as wrapping paper, plastic films, and straws. This polymer is not only safe and environmentally friendly but also provides excellent flexibility and water resistance, offering effective protection for food packaging. Paper CoatingCPVA is used to coat paper, enhancing its strength and water resistance. It is commonly applied in the production of books, magazines, and other paper-based products. Medical FieldCPVA is used to manufacture medical products, such as sutures and artificial cartilage. It has good biocompatibility and poses no adverse effects when in contact with human tissues, ensuring the safety and reliability of medical materials.   ConclusionCarboxylated polyvinyl alcohol is a multifunctional material with applications as a plasticizer, adhesive, and lubricant. It is widely used in packaging materials, paper coatings, and the medical field.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com