Yiwu Shengwei preferred procurement elastic webbing companies, cheap, specializing in the production elastic belt, knitted belt, and other products. Combustion: the use of fire to ignite, observe the state of flame, smell it emitted after combustion, post-combustion residue see, in order to determine the elastic band material. A cotton fiber and hemp fiber cotton fiber and hemp fiber are just near the flame that is burning, burning quickly, the flame was yellow, take the blue smoke. Both burning odor and burning ashes after difference is that the issue of paper burning smell of cotton, hemp ash smell burning issue; after combustion, there is very little powder ashes cotton elastic supply of imports, was black or gray, hemp is to produce a small amount of white powder ashes. Yiwu Shengwei preferred procurement elastic webbing companies, cheap, specializing in the production elastic belt, knitted belt, and other products. Reporters learned from the industry associations, in 2003 the industry developed a total of more than 300 new varieties, including four new products in Zhejiang Province grade imported color elastic band, two new products Jinhua city, Yiwu municipal new product 5. At present, Yiwu production of ribbon products in addition to some fire hose outside, basic to civilian-based. Civilian products, though large, but the overall value of the technical requirements are not high.