Raw material belt has been one of the indispensable sealing materials in life, but there are many kinds of raw material belt on the market, how to choose and buy high-quality raw material belt. Now raw material belt manufacturers-yongfeng tell you: You can first observe the raw material belt: pull out raw material belt with the eye to see, the quality of a good connoisseur to see. A good raw material belt, first of all, its texture must be very uniform, pure color, surface smooth without texture, no impurities, hand touch: Finger pulp touch the surface of raw material belt, feel smooth, with a strong silky smooth, and no stick. Stretch a raw material belt: Light Longitudinal tensile, belt surface is not easy to deformation and fracture (to force to break) ; lateral tensile side width, it can withstand at least 3 times its own tensile width. In line with the above requirements of raw material belt, then this raw material belt quality is qualified.