The tarpaulin must consider its breathability

Update:14-03-2020
Summary:

The tent is mainly composed of two parts, one is an alu […]

The tent is mainly composed of two parts, one is an aluminum alloy main frame, and the other is a tarpaulin. Tents and tarpaulin products can protect from rain, heat and cold. Therefore, such products are required to have certain performance.

1. The basic performance requirements of the tarpaulin are considered from the various uses of the tarpaulin. The requirements that should generally be met are: (1) light weight, easy to fold, convenient handling, high strength, wear resistance, and long service life. (3) waterproof performance and Good breathability, anti-condensation water on the inside (4) acid and alkali resistance, mildew resistance, corrosion resistance (5) good weather resistance, flame retardant and fire resistance (6) no wicking effect, no moisture conduction phenomenon will occur. Tarpaulins generally require the function of "three defenses". That is waterproof, fireproof (flame retardant), and mildew proof.

2. Main performance indicators When specifically designing or using the product, the following performance indicators of the tarpaulin should be considered. Permeability: The tarpaulin must be considered for its air permeability, especially for military tarpaulins. The factors that affect air permeability are the base fabric structure, density, material, type of waterproof finishing agent, and resin adhesion. As the amount of resin adhered increased, the air permeability of the plastic tarpaulin decreased.

Of course this depends on the finishing agent used. Generally, most tents with air permeability are made of paraffin or acrylic resin, such as cotton, vinylon, lacquer, etc. Especially as a large tent for inflatable buildings, the tensile strength is extremely important. Generally, the base fabric uses long-strength fabrics such as high-strength polyester and vinylon. Waterproof finishing by vinyl chloride resin and chlorosulfonylated polyethylene resin. The strength of the product is mainly determined by the strength of the fiber material and the density of the fabric.

3. Elongated leather and dimensional stability: As eaves tents and large tents, they are 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 tarpaulin damage is mainly caused by tearing, so the tear strength is an important indicator of tarpaulin. The tear strength is related to whether the tarpaulin will be broken due to the action of foreign objects or for some reason to expand around after forming a hole, forming a large structural crack. Therefore, when the tension is high. Both high tensile strength and high tear strength of the tarpaulin are required.

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 structure to form a coating film. If the resin adhesion amount per unit area exceeds a certain level, water resistance is not a problem.