Cold vs Hot Water PVA Film: How to Choose Thickness & Type

 Cold Water vs Hot Water PVA Film: How to Choose the Right Film for Your Product and Machine

Over 70% of pod leakage and sealing problems are caused by wrong film selection, not the machine. Too thin film breaks. Too thick film won’t dissolve. Wrong dissolution temperature causes residue complaints.

This guide from POLYVA will help you choose the right PVA film the first time.

 The Two Main Types: Cold Water vs Hot Water Soluble

Cold-Water-Soluble PVA Film

Dissolves in water above 10-15°C within 2-5 minutes. This is the standard for 90% of packaging applications: laundry pods, dishwasher capsules, agrochemical sachets, dyes, cement additives. Consumers use cold or warm water, so fast dissolution is critical.

Hot-Water-Soluble PVA Film

Dissolves only above 60-65°C. It stays intact in cold water but disappears in hot wash. Main uses: hospital infectious laundry bags, embroidery backing, garment packaging that prevents dust but dissolves in industrial washing. Also used as mold-release film.

Choosing the wrong type is fatal: hot-water film used for laundry pods will leave film pieces on clothes in cold wash.

 Thickness Matters: 25 to 200 Micron Guide

| Thickness | Best For | Dissolution Time at 25°C |

| :--- | :--- | :--- |

| 25-40 micron | Embroidery, water transfer printing | 30-60 sec |

| 75-85 micron | Light laundry pods 8-15ml | 2-3 min |

| 90-110 micron | XL pods, dishwasher, detergent sheets | 3-5 min |

| 120-150 micron | Agrochemicals 100g-1kg, dyes | 5-8 min |

| 150-200 micron | Heavy industrial blocks, concrete additives | 8-12 min |

Thicker film = stronger sealing and puncture resistance, but slower dissolving. POLYVA lab tests your chemical load to balance strength vs speed.