Factors affecting the quality and life of tarpaulin

Tarpaulin is a waterproof material with high strength, good toughness and softness. It is often used as canvas (canvas), polyester with polyurethane coating or made of polyethylene plastic. Tarpaulins usually have sturdy grommets at the corners or edges for easy lashing, hanging or covering. So do you know what are the factors that affect the quality and life of tarpaulins? 1. Tear strength: The breakage of the tarpaulin is mainly caused by tearing, so the tear 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. Both high tensile strength and high tear strength are required for the tarpaulin. 2. 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. 3. Flame retardancy: Starting from the safety of use, the tarpaulin is required to have good flame retardancy. Flame retardancy can be obtained by selecting flame retardant fibers and flame retardant base fabrics. 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. 4. Air permeability: The air permeability of tarpaulins is 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 decreased. Of course this depends on the finishing agent used. Generally, most of the tents with air permeability are made of cotton, vinylon, lacquer and other short fiber fabrics finished with paraffin or acrylic resin. 5. Tensile strength: The tarpaulin must bear 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 deformed. 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. 6. Retraction stability is also called elongation skin and dimensional stability: as eaves tents 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. Of course, it is not necessary for tarpaulins to have all the above elements. Depending on the type and functionalization of use, the detection indicators are also different.

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