What is the function of tarpaulin?

The tent is mainly composed of two parts, one is aluminum alloy main frame, and the other is tarpaulin. Tarpaulins and tarpaulins can be used to prevent rain, heat and cold. Therefore, these products are required to have certain special properties. Qingdao oasis tarpaulin factory comes to tell you what the necessary properties of tarpaulin are?

（1） Basic performance requirements of tarpaulin

Considering the various uses of tarpaulin, the general requirements should be met are:

(1) Light weight, easy to fold, easy to carry and operate;

(2) High strength, wear resistance and long service life;

(3) Good waterproof and air permeability, anti condensation water on the inner side;

(4) Acid and alkali resistance, mold resistance and corrosion resistance;

(5) Good weather resistance, flame retardant and fireproof;

(6) No wicking effect, no moisture conduction.

Tarpaulins are generally required to have the "Three Prevention" function. Namely, waterproof, fireproof (flame retardant) and mould proof.

（2） Main performance indicators

In the specific product design or use, the following performance indicators of tarpaulin shall be considered.

1. Air permeability: the air permeability of tarpaulin must be considered, especially the military tarpaulin. The influencing factors of air permeability include the structure, density, material, type of waterproof finishing agent, resin adhesion, etc. With the increase of resin adhesion, the air permeability of tarpaulin decreased. Of course, this is related to the finishing agent used. Most of the tents with air permeability are made of cotton, vinylon, lacquered fiber and other short-lived fabrics treated with paraffin or acrylic resin.

2. Tensile strength: the tarpaulin shall bear various tensions during use, such as tension during fixation; In the process of use, it is subject to the effect of wind, rain, and other additional forces. Despite these external forces, they are still required to keep their original shape and not easily deform, which requires that the tarpaulin has high tensile strength and there should not be too large difference in tensile strength in the longitudinal and latitudinal directions. In particular, the tensile strength Ji of a large tent used as an inflatable building is 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. Extended skin and dimensional stability: it is often used under tension as eaves tent and large tent The elongation of 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 tarpaulin 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 break due to the action of flying foreign objects or expand around after forming holes for some reasons to form large structural cracks. So when the tension is large. The canopy cloth is required to have both high tensile strength and high tear strength.

5. Water resistance: water resistance is an important characteristic of tarpaulin. Through impregnation, the vinyl chloride resin is filled in the gap of the fabric to form a coating film. If the amount of resin adhesion per unit area exceeds a certain level or more, the water resistance is not a problem. If the film is thin, it is easy to break when it is bent, rubbed or worn, which may cause mud.

6. Flame retardancy: from the safety of use, it is required that the tarpaulin has good flame retardancy. Flame retardancy can be obtained by selecting flame retardant fiber and flame retardant base cloth It can also be achieved by adding flame retardant to the coating agent. The amount of flame retardant added has a direct relationship with the flame retardant effect.

In addition to the above performance requirements, the tarpaulin is also required to have excellent cold resistance, heat resistance, tarpaulin, creep resistance, repeated fatigue resistance, abrasion resistance and bending and bending resistance.