a commonly used material : Vinyl-coated for polyester

Vinyl-coated polyester is a commonly used material for flexible fabric structures. Consists of polyester scrim, glue or glue, and an external PVC coating. The scrim supports the coating (initially applied in liquid form) and provides the resulting fabric with tensile strength, elongation, tear strength, and dimensional stability. According to its formulation, the PVC coating makes the material waterproof, resistant to dust, mold, oils, salts, chemicals and UV rays, giving the material high strength and durability. It can be sewn or heat-sealed by radio frequency (RF) welding or hot air welding.

The tensile strength of the base fabric depends on the size and strength of the yarn (denier) and the number of yarns per straight line distance. The larger the thread and the more threads per inch, the greater the tensile strength of the finished product.

The binder acts as a chemical bond between the polyester fibers and the outer coating, preventing the fibers from sucking and absorbing water into the scrim. This prevents damage from water absorbed during the freeze-thaw cycle.

What is PVA glue made from? PVA is a rubbery synthetic polymer with the formula (C4H6O2)n. It belongs to the polyvinyl esters family with the general formula [RCOOCHCH2]. It is a type of thermoplastic. Polyvinyl acetate is a component of a widely used glue type, commonly referred to as wood glue, white glue, carpenter’s glue, school glue, Elmer’s glue (in the US), or PVA glue.

PVC coatings (vinyl silicone sol or plastisol) contain chemicals to achieve the desired color, water, mold resistance and flame retardancy. The light transmittance of the cloth also varies from very transparent to completely opaque. After the coating is applied to the scrim, the cloth passes through a heating chamber to dry the liquid coating.