The main performance of the tarpaulin should be considered when designing or using the tarpaulin.
1. Air permeability
Tarpaulins must consider their breathability, especially military tent fabrics. The influencing factors of breathability include the structure of the base fabric, density, material, type of waterproof finishing agent, and resin adhesion. 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 air-permeable tents are made of cotton, vinylon, lacquer and other short-woven fabrics finished with paraffin wax or acrylic resin.
2. Tensile strength
The tarpaulin must be subjected to various tensions during use. For example, when it is fixed, it will be tensioned; during use, it will be subjected to additional forces such as wind, rain, and energy saving. Despite these external forces, they are still required to maintain their original shape and not easily deform. This requires the tarp to have a higher tensile strength, and there should not be too much difference in tensile strength in the warp and weft directions. Especially 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 eaves tents and large tents, they are often used under tension. Fabric elongation should not be too large, and its dimensional stability is determined by the creep characteristics of the material.
4. Tearing strength
Tarpaulin damage is mainly caused by tearing, so tear strength is an important indicator of tarpaulin. The tear strength is related to whether the tarpaulin will break due to the action of flying foreign objects or expand to the surroundings after forming a hole for some reason, forming a large structural crack. Therefore, when the tension is high. The tarpaulin is required to have high tensile strength and high tear strength.
5. Water resistance
Water resistance is an important feature of tarpaulin. Through dipping and finishing, the vinyl chloride fat 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, the coating film is easy to crack when it is bent, rubbed or the surface is worn, which may cause muddy water.
6. Flame retardancy
From the safety of use, the tarpaulin is required to have better 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.
In addition to the above-mentioned performance requirements, tarpaulin also requires superior cold resistance, heat resistance, tarpaulin, creep resistance, repeated fatigue resistance, abrasion resistance, and bending resistance.