Technologies of Film Forming Equipment for Water-Soluble Pods

The film forming link is a crucial part in the production of water-soluble beads, as the quality of the water-soluble film directly affects the dissolution speed, sealing performance and storage stability of the finished product. The film forming equipment for water-soluble beads mainly targets polyvinyl alcohol (PVA) and its modified materials, adopting advanced forming technologies to produce films that meet strict standards.

The mainstream film forming technologies currently include blow molding and casting. Blow molding equipment uses hot air to blow the melted PVA material into a film bubble, which is then cooled and flattened to form a thin film. This technology has the advantages of high production efficiency and uniform film thickness, suitable for large-scale continuous production. Casting equipment coats the PVA solution on a smooth metal roller, and forms a film after drying and curing. The film produced by this method has high transparency and stable mechanical properties, suitable for high-end water-soluble bead products.

The core of film forming equipment lies in the precise control of temperature, pressure and speed parameters. The temperature of the melting zone is usually controlled between 150-180℃, and the cooling temperature is adjusted according to the film thickness to avoid film brittleness or poor adhesion. In addition, the equipment is equipped with online thickness detection devices to monitor the film thickness in real-time and adjust parameters automatically . With the development of environmental protection materials, the film forming equipment has also been upgraded to adapt to biodegradable PVA modified films, helping the industry achieve green development.