我们判断，4 月份美国商业原油库存将创历史新高，若OPEC 及G20国家在5 月份按计划量减产，并且部分北美洲和欧洲国家“复工”，则4 月底-5 月初或为油价的底部区间。若“复工”晚于预期，OPEC 和G20 减产执行率过低，库存可能在5-6 月份饱和。最近两周，受到医用聚丙烯如口罩等产品需求大幅增长的影响，聚丙烯、丙烯、线型低密度聚乙烯等价格出现上涨。因熔喷布扩产周期较长，短期内其他聚丙烯及聚乙烯产品无法替代熔喷布，部分不符合要求的“熔喷布”进入市场。随着国内对违法商品的打击，聚丙烯拉丝料及线型低密度聚乙烯等产品价格有望回落。

Quartz word is derived from querkluftertz, an old German word which means whitish vein quartz. The word Quartz is also derived from ancient Greek word krustallos, which means, ice, because it was believed that the quartz is ice which never melts. The Sumerians cut and carved several quartz stones and used them as a cylinder seals and ring seals. The Egyptians made beads, scarab figures, and other jewelry from quartz stones. Quartz is a hard, crystalline mineral which consists of silicon and oxygen atoms. These atoms are linked with each other to form SiO4 silicon–oxygen tetrahedra. The global quartz report focuses on revenue generated from various quartz material as well as end-user industry utilizing quartz including electronics & semiconductor, solar, buildings & construction, medical, optics and telecommunication and other. Moreover, the report analyzes the current market trends of Quartz in different regions and suggests the future growth opportunities by analyzing government regulations & policies, thereby further increasing the consumer acceptance of Quartz. The factors driving the growth of the market includes increasing use of Quartz in end-user industries such as alumina, pulp & paper, soap and detergent, water treatment, and others. In addition, with rise in the chemical industry, the demand for Quartz is expected to increase significantly, as it is used in manufacturing of organic and inorganic chemicals.

Synthetic diamonds are widely used in superabrasive tools, such as grinding wheels, and cutting, drilling, and dressing tools, for manufacturing products in the automotive, medical, aerospace, and electronics industries. Sharp edge retention and higher strength of superabrasive tools provide higher productivity and better performance, when compared to other manufacturing tools. • In the aerospace industry, super abrasives are widely used, owing to the characteristics, such as hardness, longevity, resistance to abnormal temperatures, and chemical inertness. The application of super abrasive include tooling and grinding solutions for turbine engines and grinding tools for aero structural compounds and air frame. • The aerospace industry is experiencing a stagnant growth, owing to the strengthening of passenger travel demand and rising global military expenditure for the air force industry. Backlog of new aircraft orders and the constant resurgence of business aircraft may further add to the growth of the aerospace industry.

Currently, the largest application of silicone is in the construction industry, where its applications range from structural glazing and weatherproofing to energy- efficient materials used in the buildings. In the era of modern construction, silicone offers flexible solutions for the construction sector, which ranges from caulk, seals, coatings to intricate silicone profiles and expansive sections fitted to glass, steel, and plastics. Besides, silicone has facilitated the construction sector to produce wide range of custom solutions to offer insulation and protection benefits. Besides, silicone also helps to improve in-shop productivity and reduce material waste, while extending building life and reducing lifecycle costs. During 2018, the global construction industry grew by about 3.5%, and is further likely to witness growth in the coming years due to robust performance of the construction sector. Asia-Pacific and North American regions have been witnessing a strong growth in the residential construction sector. Asia-Pacific has been witnessing strong growth in the residential construction in countries, such as India, China, Philippines, Vietnam, and Indonesia. Besides in North America, high housing demand due to growing population and increased immigrants, and trend of nuclear families are some of the factors driving the residential construction in the region.