How to make PVC coated fabric? (Some methods)

The following is a breakdown of the steps involved in manufacturing PVC-coated fabric:

I. Preparing the Fabric Base

Selecting a sturdy base fabric: Use a high-density woven polyester fabric (sturdy like canvas) or nylon fabric, and clean it to ensure a clean surface.
Stretching and mounting:  Stretch the fabric roll onto a conveyor belt, similar to a printing and dyeing factory, ready for coating.

II. Preparing the "PVC Plastic Paste"

Turning plastic granules into a paste: Mix PVC powder with plasticizers (to soften the plastic) and stabilizers (to prevent sun damage and cracking), stirring it into a thick white paste.
Adding functional additives:
For fire resistance? Add "flame retardants" (similar to fire extinguishing agents).
For mildew resistance? Add "antibacterial agents".
Want color? Add color paste and mix well.

III. Coating the Fabric with the Paste

Even coating with a doctor blade (common method):
The conveyor belt carries the fabric through the paste tank, and a thin steel blade (doctor blade) scrapes the PVC paste onto the fabric surface, controlling the thickness.
Like spreading batter: The fabric is the pan, and the doctor blade spreads the paste into a thin layer.
Immersion method (for thicker coatings):
The entire roll of fabric is immersed in the paste tank, and after removal, excess paste is squeezed out. This is suitable for making waterproof pond liners.

IV. Shaping and Setting in the "Oven"

High-temperature baking: The coated fabric enters a high-temperature drying tunnel (around 200℃), where the PVC paste melts into a smooth film, firmly adhering to the fabric.
Cooling and embossing:
After coming out of the oven, it is flattened with cold rollers to prevent wrinkles.
Want a pattern? While still hot, use an embossing roller to create raised or recessed textures (such as imitation leather patterns).

V. Finishing and Quality Inspection

Trimming and deburring: Trim off the edges and check the coating for uniformity and absence of bubbles before rolling the fabric.
Performance testing:
Pour water to see if it penetrates (waterproof test).
Fold repeatedly to see if it cracks (flexibility test).