BT

News dynamics


Classification and functional characteristics of tarpaulins

Release time:

2016-01-23 11:43

The rough definition of tarpaulin is: a thicker cotton or linen fabric. Tarpaulin was originally used for sails and got its name. Generally, plain weave is used, and a small amount of twill weave is used. The warp and weft yarns are woven with multi-strand threads.
Generally, tarpaulins are generally divided into two categories according to the material used: coarse tarpaulins and fine tarpaulins.
1. Rough tarpaulin is also called tarpaulin. The fabric is strong and resistant to folding and has good waterproof properties. It is used for covering automobile transportation and open-air warehouses and setting up tents in the wild;
2. The warp and weft yarns of fine tarpaulin are used to make labor protection clothing and supplies. After dyeing, they can also be used as fabrics for shoes, travel bags, backpacks, etc.
In addition, there are rubber tarpaulins, shielding tarpaulins for fire protection and radiation protection, and tarpaulins for paper machines.
The tarpaulin has the functions of rainproof, heatproof, coldproof, etc. It has good waterproof performance and breathability, and the inside is anti-condensation. It is acid and alkali resistant, mildew-proof, and anti-corrosion. It has good weather resistance, flame retardant, and fireproof. It has high strength and resistance to Wear and long service life are all advantages of tarpaulin.
What are the performance characteristics of tarpaulins currently sold on the market?
1. Breathability: The breathability of tarpaulins must be considered, especially military tent fabrics. The factors that affect breathability include 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, if it is tightened when fixed, 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 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: Tarpaulin damage is mainly caused by tearing, so tear 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, the tarpaulin is 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.