Chen licensing of sling is a mid-range brand-chen, the color loading zone, a safety factor of six times its width and thickness relative to 5-fold safety factor harness its thickness and width should be higher, corresponding to 6-fold safety factor the minimum breaking force, on the understanding that: If the rated load of 3 tons of lifting belt, lifting belt sheath with a minimum breaking load is: rated load 3 t × 6-fold safety factor = 18 t minimum breaking force. 6-fold safety factor sling black line is a solid line, 5-fold safety factor is dashed black line. Dyeing sling required to achieve pure color, color uniformity, Henan lifting belt, there is no clear color too, if they have a color in sling dyeing process, then we can through the following methods to solve, can be reduced chromatic aberration minimum, so as to achieve a uniform shade, round sling, can be placed in 2% -4% PALEGAL-SF in the dyeing bath which, by adjusting the pH 4-5 acetic acid, heated to between 125-135 ℃, in dye bath dyeing process 1-2h began to heat up. Flat sling _ synthetic fiber loading zone (certified) _ sling from Hebei, Henan Chen force sling Manufacturing Limited. Hebei chen sling Manufacturing Co., Ltd. (www.chenlisling.com) Hebei Baoding, stacking handling machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Chen led force in a sling with the staff warmly welcome all inquiries negotiations to create chen sling a better future.