A family of elastomer composites has been developed which has outstanding tear resistance, and good tensile strength and elongation to failure as measured in a standard tensile test. These composites constitute a family in that they all are sparsely reinforced by a fishnet‐like webbing of reinforcement. The members of the family differ in that the reinforcements can be as flexible as soft polyurethane rod or as stiff as carbon fiber with 3000 strands per fiber. All these composites produce outstanding tear strength and an increase in the elongation to failure in an ASTM Die‐C type of tear test. The intersections of the polyurethane rod reinforcements prove to be effective crack arrestors.
One objective of the work discussed in this paper is to develop a material with high snag resistance, where snagging is the glancing penetration of a composite sheet by sharp objects. The best material of those tested to date is a soft polyure‐thane sheet reinforced sparsely with a web of extruded polyurethane fiber. Stiff carbon fibers sparsely distributed also give good snagging resistance, but closely spaced stiff fibers do not perform well in the ASTM Standard test for snag resistance.
according to analyzing and summarizing the literature of ilmenite concentrate smelting titanium slag, comes to conclude: the production process of ilmenite concentrate smelting titanium slag can be divided into the one-step method and two-step method, dominated by two-step method at home; foreign dominated by two-step. This paper introduces the main content of one-step method and two-step method, and compares the two methods from aspects of technology, quality, cost and environmental protection, and finally summarizes it.
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