摘要 |
PURPOSE: An inducing ring made by injection-molding polypropylene, ultraviolet absorbing agents, heat stabilizers, oxidants, colorants, plasticizers and the like is provided. The product has good hardness and is useful as agricultural materials for building a vinyl house. CONSTITUTION: Polypropylene is mixed with ultraviolet absorbing agents, heat stabilizers, oxidants, colorants, plasticizers, fillers, foaming agents, lubricating agents and antistatic agents, plasticized at 200deg.C and then injection molded to give an inducing ring for agricultural use. |