Description①　Spandex can be elongated 4-7 times and hark back after disengagement.②　Every yarn is made of several spun yarn which is uniform tension.③　Resilient force of every Dtex is 3 times than elastics.④　The stess and strain curves is more smooth.Keeping smooth resiliency force in the effective area.⑤　Wide elongation area.The uniform design specification of elastic force is from 2.0-4.0 times elongation.⑥　About 3kgs per roll.SpecificationAbout testing item840DBroken prolongation(%)500Broken intensity(CN)610Plastic distortation(%)<6Elastic recovery rate(% )>94Specific gravity0.9-1.2Intenerate point(°C)175-200Oiliness (% )<3Equivalent does (m/kg)about 14900  Website:http://www.alldiapermaterials.com