Lifting straps are made of synthetic fiber materials, and there are many synthetic fiber materials used to manufacture lifting straps. The more common ones are polyester lifting straps, polypropylene lifting straps, and nylon lifting straps. And currently, the most popular sling is polyester sling. So what is the reason why polyester sling is more popular?
Firstly, polyester material has excellent strength, with polyester staple fibers having a strength of 2.6-5.7 cN/dtex and high-strength fibers having a strength of 5.6-8.0 cN/dtex. At the same time, it has the characteristic of low moisture absorption, which makes its strength in a wet state basically the same as in a dry state, and will not be greatly affected. The impact strength is four times higher than that of nylon.
Next is the heat resistance of polyester, which is made by melt spinning method. The formed fibers can be further melted by heating and belong to thermoplastic fibers. Moreover, the melting point of polyester is relatively high, and its specific heat capacity and thermal conductivity are relatively small. Therefore, the heat resistance and insulation properties of polyester fibers are much better than those of other synthetic fibers.
Finally, the corrosion resistance of polyester is very good. Polyester itself has excellent corrosion resistance, which is manifested in its resistance to acidic corrosive agents such as bleaching agents, oxidants, hydrocarbons, ketones, petroleum products, and inorganic acids. It is resistant to dilute alkali and not afraid of mold, but hot alkali can decompose it. It also has strong acid and alkali resistance, as well as UV resistance. Apart from polypropylene, which can rival it, there are basically no rivals.
Compared with most lifting belts, polyester lifting belts may not rank first in a single item, but they are definitely at the forefront, and the ranking of each item is very high. In terms of overall strength, polyester lifting straps are currently the best, which is also the main reason why most people choose polyester lifting straps.