PVA water-soluble film

Technical overview

There are two main methods in producing PVA water-soluble films:

l   Water-soluble method: PVA is dissolved in water then poured onto a steel strip through a slot die, and then moisture is removed with an oven, forming a thin film.

l   Extrusion method: PVA is mixed with related formulas and then films are formed by an extrusion machine.

Applications

Chemical packaging, embroidery, textile packaging, food packaging, electronics packaging, agricultural packaging, interior and exterior of bicycles and vehicles, gifts and stationary, decoration, furniture, communication industry, sports equipment etc.

Features

l   PVA films do not yellow

l   The dissolving rate can be controlled

Key techniques

l   PVA raw material selection

l   Choice of additives

l   Extrusion process selection

l   PVA raw material moisture control

l   Screw configuration design

l   Slot die and extrusion method design