PVOH/PVA Water-Soluble Film is a high-polymer film made from polyvinyl alcohol (PVOH or PVA), known for its excellent water solubility, biodegradability, and eco-friendly properties. It is widely used in packaging, pharmaceuticals, agriculture, and industrial fields, particularly in scenarios requiring environmental sustainability or specific dissolution characteristics.
Key Properties
- Water Solubility:
- Dissolves quickly in water, with the dissolution rate depending on film thickness, water temperature, and water quality.
- Dissolution temperature typically ranges from 5°C to 90°C.
- Biodegradability:
- Fully biodegradable by microorganisms, causing no environmental pollution.
- Mechanical Properties:
- High tensile strength and flexibility.
- High transparency and good gloss.
- Barrier Properties:
- Excellent barrier properties against oxygen, oils, and organic solvents.
- Eco-Friendliness:
- Non-toxic, odorless, and compliant with food and pharmaceutical safety standards.
- Printability:
- Smooth surface, suitable for printing and coating.
Applications
- Packaging Industry:
- Detergent Packaging: Used for single-dose detergent pods (e.g., laundry pods) that dissolve upon contact with water.
- Pesticide Packaging: Used for water-soluble pesticide bags, reducing exposure risks.
- Dye and Chemical Packaging: Provides safe and convenient packaging solutions.
- Pharmaceutical Field:
- Drug Packaging: Used for single-dose drug packaging, making it convenient for patients.
- Medical Dressings: Used as a base material for water-soluble dressings.
- Agricultural Field:
- Seed Coating: Used for water-soluble seed coating materials.
- Fertilizer Packaging: Used for water-soluble fertilizer bags.
- Industrial Field:
- Temporary Protective Films: Used for temporary protection of metal, glass, and other surfaces, easily washable.
- Embroidery Backing: Used for water-soluble embroidery backings, leaving clean embroidery patterns after dissolution.
- Environmental Field:
- Biodegradable Trash Bags: Used for eco-friendly trash bags, reducing plastic pollution.
Technical Parameters
- Thickness: Typically 20–100 microns, customizable based on requirements.
- Dissolution Temperature: Cold-soluble (5°C–25°C), medium-soluble (25°C–60°C), hot-soluble (60°C–90°C).
- Tensile Strength: ≥ 30 MPa.
- Elongation at Break: ≥ 150%.
- Transparency: ≥ 90%.
Production Process
- Raw Material Preparation: Dissolve PVOH/PVA resin in water to form a uniform solution.
- Casting: Apply the solution onto a smooth surface using a casting machine to form a film.
- Drying: Dry the film at an appropriate temperature to remove moisture.
- Rolling: Roll the dried film for further processing or packaging.
Advantages
- Eco-Friendly: Fully biodegradable, reducing plastic pollution.
- Safe: Non-toxic and odorless, suitable for food and pharmaceutical packaging.
- Convenient: Dissolves upon contact with water, easy to use.
- Versatile: Suitable for various industries and applications.
Storage and Usage
- Store in a cool, dry place, avoiding high temperature and humidity.
- Avoid contact with sharp objects to prevent film damage.
- Select the appropriate dissolution temperature based on requirements.
Summary
PVOH/PVA water-soluble film is an eco-friendly, safe, and versatile high-polymer material widely used in packaging, pharmaceuticals, agriculture, and industrial fields. Its excellent water solubility and biodegradability make it an ideal alternative to traditional plastic films. If you need more information about its applications or technical details, feel free to ask!
