In the specific product design or use, the following properties of the tarpaulin should be considered.
The air permeability of tarpaulins must be considered, especially for military tent fabrics. The factors affecting air permeability include base fabric organization, density, material, type of waterproof finishing agent, and resin adhesion. With the increase of resin adhesion, the air permeability of the tarpaulin covers fabric decreased. Of course this depends on the finishing agent used. Generally, most of the tents with air permeability are products of short fiber fabrics such as cotton, vinylon and lacquer that are finished with paraffin or acrylic resin.
2. Tensile strength
The tarpaulin must be subjected to various tensions during use, such as tension when it is fixed; it must be subjected to additional forces such as wind, rain, and province during use. Despite these external forces, they are still required to maintain their original shape and not easily deform, which requires the tarpaulin to have a high tensile strength, and there should not be too much difference in the tensile strength of the warp and weft. In particular, the tensile strength of large tents used as inflatable buildings is extremely important. Generally, the base fabric is made of high-strength polyester, vinylon and other long-fiber fabrics. Waterproof finishing with vinyl chloride resin and chlorosulfonated polyethylene resin. The strength of the product is mainly determined by the strength of the fiber material and the density of the fabric.
3. Elongation and dimensional stability
As canopies and large tents, it is often used under tension. The elongation of the fabric should not be too large, and its dimensional stability is determined by the creep characteristics of the material.
4. Tear strength
The damage of the tarpaulin is mainly caused by tearing, so the tearing strength is an important indicator of the tarpaulin. The tear strength is related to whether the tarpaulin will break due to the action of flying foreign objects or expand to the surrounding after forming holes for some reasons, forming large structural cracks. So, when the tension is high. The tarpaulin is required to have both high tensile strength and high tear strength.
5. Water resistance
Water resistance is an important characteristic of tarpaulins. By dipping and finishing, the vinyl chloride fat is filled in the gaps of the fabric to form a coating film. If the resin adhesion amount per unit area exceeds a certain level, water resistance will not be a problem. If the coating film is thin, when it is bent, rubbed or worn on the surface, the coating film is easily broken, which may cause muddy water.