1. Breathability
The air permeability of the tarpaulin must be considered, especially for military tent fabrics. The factors that affect the air permeability include the base fabric structure, density, material, type of waterproof finishing agent, amount of resin adhesion, etc. As the amount of resin adhesion increases, the air permeability of the tarpaulin decreases. Of course this is related to the finishing agent used. Generally, most breathable tents are made of short woven fabrics such as cotton, vinylon, and lacquer that have been finished with paraffin or acrylic resin.
2. Tensile strength
The tarpaulin must withstand various tensions when in use. For example, when it is tightened, it will be subject to tension; during use, it will be subject to additional forces such as wind, rain, and rain. Despite these external forces, they are still required to maintain their original shape and not be easily deformed. This requires the tarpaulin to have high tensile strength, and there should not be a large difference in tensile strength in the warp and weft directions. Especially for large tents used in inflatable buildings, the tensile strength is extremely important. Generally, the base fabric is made of high-strength polyester, vinylon and other long fiber fabrics. It is waterproofed 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 eaves tents and large tents, they are often used under tension. The fabric elongation should not be too large, and its dimensional stability is determined by the creep characteristics of the material.
4. Tear strength
Tarpaulin damage is mainly caused by tearing, so tearing strength is an important indicator of tarpaulin. Tear strength is related to whether the tarpaulin will be broken due to the action of flying foreign objects or whether it will expand around 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 tarpaulin. Through dipping and finishing, vinyl chloride resin is filled in the gaps of the fabric tissue to form a coating film. If the amount of resin adhesion per unit area exceeds a certain level, water resistance is not a problem. If the coating film is thin, it will easily break when it is bent, rubbed, or worn on the surface, which may cause muddy water.
6. Flame retardancy
From the perspective of safety, tarpaulins are required to have good flame retardancy. Flame retardancy can be obtained by selecting flame retardant fiber and flame retardant base fabric. It can also be achieved by adding flame retardant to the coating agent. The amount of flame retardant added is directly related to the flame retardant effect.
